CN116983704B

CN116983704B - Condensing device and method

Info

Publication number: CN116983704B
Application number: CN202311260674.0A
Authority: CN
Inventors: 纪雪峰; 陈亮; 范威威
Original assignee: Shanghai Liangwei Electromechanical Engineering Co ltd
Current assignee: Shanghai Liangwei Electromechanical Engineering Co ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2023-12-22
Anticipated expiration: 2043-09-27
Also published as: CN116983704A

Abstract

The invention relates to a condensing device and a condensing method. The ammonia gas buffer device has the advantages that the buffer unit is arranged between the ammonia gas source and the condensing unit, so that the buffer unit can buffer ammonia gas entering the condensing unit, the unstable condition of the pressure of the ammonia gas entering the condensing unit can be solved, the rapid increase and the rapid decrease of the pressure of the ammonia gas are avoided, a more stable and continuous gas source is provided for the condensing unit, and the danger caused by the rapid increase of the pressure in a pipeline for a short time is avoided; the analysis unit is arranged in the buffer unit, so that ammonia entering the buffer unit can be analyzed, whether the ammonia is polluted or not is judged, the ammonia reaching the standard is conveyed to the condensation unit, and the polluted ammonia is conveyed to the waste discharge unit; through setting up the recovery unit for the contaminated liquid ammonia or ammonia are retrieved in buffer unit, still are used for retrieving too much liquid ammonia.

Description

Condensing device and method

Technical Field

The invention relates to NH ₃ The technical field of condensation technology in purification technology, in particular to a condensation device and a condensation method.

Background

Ultra-pure ammonia is the main material of microelectronic silicon nitride masking films, in recent years, the global information industry has rapidly developed, and according to the latest statistics of the consumption of global electronic chemicals, the asia-pacific area, especially China, has become the dominant market of the global electronic industry and chemicals thereof, and the explosive development of semiconductor industry required by the information industry has also rapidly increased the demand of high-purity electronic chemicals. The resistivity of the product is greatly changed by doping trace impurity elements into the pure semiconductor product, so that the purity requirement of the semiconductor industry on chemical materials is extremely high.

In the prior art, chinese patent (CN 218248580U) discloses an ultrapure ammonia rectification device, which comprises a rectification kettle shell, a heating box, a receiving box, a stirring mechanism and a condensation component; the main principle of the device is that ammonia is conveyed to a condensation block through a pump, then ammonia flowing through a condenser is condensed by a cold clot, then a bottom opening of a U-shaped pipe in the cold clot is provided with a receiving header pipe and a valve, and then condensed liquid ammonia flows to a finished product collecting box through a collecting pipe. However, this solution has the following drawbacks:

1) In the prior art, the detection and analysis functions are not available, the ammonia gas/water can be polluted in all links of condensation, the polluted liquid ammonia can not be detected in real time without the detection and analysis functions, and whether the finished liquid ammonia is polluted or not can not be known;

2) The prior art scheme has no recovery and tail gas treatment functions of the polluted liquid ammonia/ammonia, and the polluted liquid ammonia/ammonia can not be recovered or discharged to cause pollution to a finished product tank;

3) In the prior art, ammonia is conveyed by a pump, the pump conveying has pulse, the condition of excessively high instantaneous pressure possibly exists, and the potential risk is brought to the system;

4) In the prior art, the pressure detection and pressure relief functions are not provided, the liquid ammonia is easy to gasify, and if special conditions are met, the pressure of the system is too high, so that dangers exist;

at present, no effective solution is proposed for solving the problems that whether the ammonia gas/water is polluted in each condensation link, the polluted ammonia gas cannot be recovered or discharged, the pipeline pressure is possibly excessively high in the moment of ammonia gas delivery and the like exist in the related technology.

Disclosure of Invention

The invention aims at overcoming the defects in the prior art, and provides a condensing device and a condensing method, so as to solve the problems that whether the ammonia gas/water is polluted in each condensing link, the polluted ammonia gas cannot be recovered or discharged, the pipeline pressure is possibly excessively high in the moment of ammonia gas conveying and the like in the related art.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

in a first aspect, the present invention provides a condensing unit comprising:

the buffer unit is communicated with an ammonia source and is used for acquiring and buffering ammonia;

the condensing unit is communicated with the buffer unit and is used for condensing ammonia gas to obtain liquid ammonia;

the analysis unit is communicated with the buffer unit and is used for analyzing the ammonia gas;

the recovery unit is communicated with the buffer unit and is used for recovering liquid ammonia and ammonia gas;

the waste discharge unit is communicated with the buffer unit and is used for discharging waste gas in the buffer unit;

the pressure relief unit is communicated with the buffer unit and is used for relieving pressure when the pressure of the buffer unit reaches a preset pressure threshold value.

In some of these embodiments, the buffer unit includes:

the buffer element is respectively communicated with an ammonia gas source, the condensing unit, the analysis unit, the recovery unit, the waste discharge unit and the pressure relief unit and is used for obtaining ammonia gas, buffering the ammonia gas and transmitting the ammonia gas to the condensing unit;

And the first heating element is communicated with the buffer element and is used for heating and gasifying the liquid ammonia generated by ammonia condensation of the buffer element.

In some of these embodiments, the buffer unit further comprises:

the liquid level monitoring element is arranged on the buffer element and is used for monitoring the liquid level of liquid ammonia of the buffer element.

In some of these embodiments, the condensing unit comprises:

and the condensing element is communicated with the buffer unit and is positioned at the downstream of the buffer unit and used for condensing ammonia gas to obtain liquid ammonia.

In some of these embodiments, the analysis unit comprises:

and the first analysis element is communicated with the buffer unit and is used for analyzing the ammonia gas of the buffer unit.

In some of these embodiments, the recovery unit comprises:

the first recovery element is used for communicating the buffer unit with a recovery tank and recovering liquid ammonia in the buffer unit;

and the second recovery element is communicated with the buffer unit, the first-stage condensation system and the third-stage condensation system and is used for recovering the ammonia gas in the buffer unit.

In some of these embodiments, the recovery unit further comprises:

the second pressure monitoring element is arranged on the pipeline communicated with the second recovery element and used for monitoring the pressure of the pipeline.

In some of these embodiments, the waste unit comprises:

and the first waste discharge element is used for communicating the buffer unit with the tail gas treatment tank and discharging the polluted ammonia gas of the buffer unit.

In some of these embodiments, the pressure relief unit comprises:

the first pressure relief element is communicated with the buffer unit and used for relieving pressure when the pressure of the buffer unit reaches a preset pressure threshold value.

In some of these embodiments, the pressure relief unit further comprises:

the first pressure monitoring element is arranged on a pipeline communicated with the buffer unit and used for monitoring the pressure in the pipeline.

In some of these embodiments, further comprising:

and the evaporation unit is respectively communicated with the condensation unit, the analysis unit, the recovery unit, the waste discharge unit and the pressure relief unit and is used for acquiring and transmitting liquid ammonia to a finished product tank.

In some of these embodiments, the analysis unit further comprises:

the second analysis element is arranged on the evaporation unit and is used for analyzing the liquid ammonia of the evaporation unit.

In some of these embodiments, the recovery unit further comprises:

a third recovery element communicating the evaporation unit with a recovery tank for delivering liquid ammonia in the evaporation unit to the recovery tank;

and the fourth recovery element is communicated with the evaporation unit and the first-stage condensation system and the third-stage condensation system and is used for conveying the gas of the evaporation unit to the first-stage condensation system or the third-stage condensation system.

In some of these embodiments, the waste unit further comprises:

and the second waste discharge element is used for communicating a pipeline between the evaporation unit and the finished product tank with the tail gas treatment tank and discharging polluted ammonia in the pipeline.

In some of these embodiments, the pressure relief unit further comprises:

the second pressure relief element is communicated with the evaporation unit and is used for relieving pressure when the pressure of the evaporation unit reaches a preset pressure threshold value;

And the third pressure relief element is communicated with the pipeline between the evaporation unit and the finished product tank and is used for relieving pressure under the condition that the pressure in the pipeline reaches a preset pressure threshold value.

In some of these embodiments, the pressure relief unit further comprises:

and the third pressure monitoring element is arranged on a pipeline communicated with the evaporation element and is used for monitoring the pressure of the evaporation element and the pipeline.

In some of these embodiments, the evaporation unit comprises:

at least one evaporation element, the evaporation element is communicated with the condensing unit and is used for storing liquid ammonia;

and the second heating element is communicated with the evaporation element and is used for heating and gasifying the liquid ammonia of the evaporation element.

In some of these embodiments, further comprising:

and the purging unit is communicated with the evaporation unit and is used for purging the evaporation unit and the pipeline.

In some of these embodiments, the purge unit comprises:

the first purging element is communicated with an input pipeline of the evaporation unit and is used for purging the evaporation unit;

And the second purging element is communicated with the output pipeline of the evaporation unit and is used for purging the whole device.

In some of these embodiments, the purge unit further comprises:

and the fourth pressure monitoring element is arranged on a pipeline which is respectively communicated with the first purging element and the second purging element and is used for monitoring the pressure of the pipeline.

In a second aspect, the present invention also provides a condensation method applied to the condensation device according to the first aspect.

Compared with the prior art, the invention has the following technical effects:

1. the buffer unit is arranged between the ammonia gas source and the condensing unit, so that the buffer unit can buffer ammonia entering the condensing unit, the unstable condition of the pressure of the ammonia entering the condensing unit can be solved, the rapid increase and the rapid decrease of the pressure of the ammonia are avoided, a more stable and continuous gas source is provided for the condensing unit, and the danger caused by the rapid increase of the pressure in a pipeline for a short time is avoided.

2. The analysis unit is arranged in the buffer unit, so that ammonia entering the buffer unit can be analyzed, whether the ammonia is polluted or not is judged, and the ammonia reaching the standard is conveyed to the condensing unit and the polluted ammonia is conveyed to the waste discharge unit.

3. Through setting up the recovery unit for in the buffer unit contaminated liquid ammonia or buffer unit in the liquid ammonia too much circumstances with liquid ammonia carry to the recovery jar, still be used for carrying to one-level condensing system or tertiary condensing system to the contaminated ammonia in the buffer unit.

4. By arranging the pressure relief unit, the pressure is relieved under the condition that the pressure in the buffer unit and the pipeline exceeds the preset pressure, so that the safety of the whole device is ensured.

Drawings

FIG. 1 is a schematic diagram of a frame of a condensing unit according to an embodiment of the present invention;

FIG. 2 is a schematic diagram (one) of a buffer unit according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a condensing unit according to an embodiment of the invention;

FIG. 4 is a schematic diagram (one) of an analysis unit according to an embodiment of the present invention;

FIG. 5 is a schematic diagram (one) of a recovery unit according to an embodiment of the invention;

FIG. 6 is a schematic diagram (one) of a waste discharge unit according to an embodiment of the present invention;

FIG. 7 is a schematic diagram (one) of a pressure relief unit according to an embodiment of the present invention;

FIG. 8 is a schematic diagram (II) of a buffer unit according to an embodiment of the present invention;

FIG. 9 is a schematic diagram (II) of a pressure relief unit according to an embodiment of the present invention;

FIG. 10 is a schematic diagram (II) of a recovery unit according to an embodiment of the invention;

FIG. 11 is a schematic diagram of a frame of a condensing unit according to an embodiment of the present invention (II);

FIG. 12 is a schematic diagram (one) of an evaporation unit according to an embodiment of the invention;

FIG. 13 is a schematic diagram (II) of an analysis unit according to an embodiment of the present invention;

FIG. 14 is a schematic diagram (III) of a recovery unit according to an embodiment of the invention;

FIG. 15 is a schematic view of a waste discharge unit according to an embodiment of the present invention (II);

FIG. 16 is a schematic diagram (III) of a pressure relief unit according to an embodiment of the present invention;

FIG. 17 is a schematic diagram (one) of a purge unit according to an embodiment of the present invention;

FIG. 18 is a schematic diagram (IV) of a pressure relief unit according to an embodiment of the present invention;

fig. 19 is a schematic diagram (two) of a purge unit according to an embodiment of the present invention.

Wherein the reference numerals are as follows: 100. a buffer unit; 110. a buffer element; 120. a first heating element; 130. a first valve element; 140. a second valve element; 150. a liquid level monitoring element;

200. a condensing unit; 210. a condensing element;

300. an analysis unit; 310. a first analysis element; 320. a second analysis element;

400. a recovery unit; 410. a first recovery element; 420. a second recovery element; 430. a third valve element; 440. a fourth valve element; 450. a second pressure monitoring element; 460. a third recovery element; 470. a fourth recovery element; 480. a ninth valve element; 490. a tenth valve element;

500. A waste discharging unit; 510. a first waste discharge element; 520. a fifth valve element; 530. a second waste discharging element; 540. an eleventh valve element;

600. a pressure relief unit; 610. a first pressure relief element; 620. a sixth valve element; 630. a first pressure monitoring element; 650. a second pressure relief element; 660. a third pressure relief element; 670. a twelfth valve element; 680. a thirteenth valve element; 690. a third pressure monitoring element;

700. an evaporation unit; 710. an evaporation element; 720. a second heating element; 730. a seventh valve element; 740. an eighth valve element;

800. a purge unit; 810. a first purge element; 820. a second purge element; 830. a fourteenth valve element; 840. a fifteenth valve element; 850. and a fourth pressure monitoring element.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described and illustrated below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments provided herein, are intended to be within the scope of the present application.

It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is possible for those of ordinary skill in the art to apply the present application to other similar situations according to these drawings without inventive effort. Moreover, it should be appreciated that while such a development effort might be complex and lengthy, it would nevertheless be a routine undertaking of design, fabrication, or manufacture for those of ordinary skill having the benefit of this disclosure, and thus should not be construed as having the benefit of this disclosure.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is to be expressly and implicitly understood by those of ordinary skill in the art that the embodiments described herein can be combined with other embodiments without conflict.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar terms herein do not denote a limitation of quantity, but rather denote the singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein refers to two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.

Example 1

This embodiment relates to a condensing device in the present invention.

In an exemplary embodiment of the present invention, as shown in fig. 1, a condensing apparatus includes a buffer unit 100, a condensing unit 200, an analyzing unit 300, a recovery unit 400, a waste discharging unit 500, and a pressure releasing unit 600. Wherein, the buffer unit 100 is communicated with an ammonia gas source and is used for acquiring and buffering ammonia gas; the condensing unit 200 is communicated with the buffer unit 100 and is used for condensing ammonia gas to obtain liquid ammonia; the analysis unit 300 is in communication with the buffer unit 100 for analyzing ammonia gas; the recovery unit 400 is communicated with the buffer unit 100 and is used for recovering liquid ammonia and ammonia gas; the waste discharging unit 500 communicates with the buffer unit 100 to discharge the waste gas in the buffer unit 100; the pressure relief unit 600 is in communication with the buffer unit 100, and is configured to relieve pressure when the pressure of the buffer unit 100 reaches a preset pressure threshold.

As shown in fig. 2, the buffer unit 100 includes a buffer element 110 and a first heating element 120. The buffer element 110 is respectively communicated with an ammonia source, the condensing unit 200, the analyzing unit 300, the recycling unit 400, the waste discharging unit 500 and the pressure releasing unit 600, and is used for obtaining ammonia, buffering the ammonia and transmitting the ammonia to the condensing unit 200; the first heating element 120 is in communication with the buffer element 110 for heating and gasifying the ammonia condensed by the ammonia gas of the buffer element 110.

It should be noted that, the buffer element 110 may buffer the ammonia gas entering the condensing unit 200, so as to solve the unstable pressure of the ammonia gas entering the condensing unit 200, avoid the rapid increase and decrease of the pressure of the ammonia gas, and provide a more stable and continuous air source for the condensing unit 200, thereby avoiding the danger caused by the rapid increase of the pressure in a short time in the pipeline.

It should be noted that, after the ammonia gas enters the buffer element 110, heat exchange may occur due to the ammonia gas entering the buffer element 110, so that the ammonia gas is condensed into liquid and deposited on the bottom of the buffer element 110; by gasifying the liquid ammonia at the bottom of the buffer element 110 through the first heating element 120, the occurrence of deposition of a large amount of liquid ammonia at the bottom of the buffer element 110 can be reduced.

The buffer element 110 is connected to the ammonia gas source through an air inlet pipe. The number of the air inlet pipelines can be several, and the air inlet pipelines are arranged in parallel. The number of air intake lines may be set according to the input rate of ammonia gas, and is not excessively limited herein. The number of the air intake pipes may be 2, 3, 4, or the like.

Specifically, the buffer element 110 includes a buffer tank, a first buffer port, a second buffer port, a third buffer port, a fourth buffer port, a fifth buffer port, and a sixth buffer port. The first buffer port is arranged at the side part of the buffer tank and is communicated with an ammonia source (i.e. a purification device); the second buffer port is arranged at the top of the buffer tank and is communicated with the condensing unit 200; the third buffer port is disposed at a side position of the buffer tank and communicates with the analysis unit 300; the fourth buffer port is arranged at the side part of the buffer tank and communicated with the first heating element 120 through a pipeline, and is used for conveying liquid ammonia to the first heating element 120; the fifth buffer port is arranged at the side part of the buffer tank and communicated with the first heating element 120, and is used for acquiring ammonia gas transmitted by the first heating element 120; the sixth buffer port is provided at the bottom position of the buffer tank and communicates with the recovery unit 400.

The number of the first buffer ports is matched with the number of the air inlet pipelines. Generally, the number of the first buffer ports is equal to the number of the air inlet pipelines, that is, the first buffer ports are in one-to-one correspondence with the air inlet pipelines. It should be noted that the number of the first buffer ports may be 2, 3, 4, etc.

Specifically, the first heating element 120 includes a first heating member, a first heating circuit, and a second heating circuit. Wherein, two ends of the first heating pipeline are respectively communicated with the fourth buffer port and the first heating element; two ends of the second heating pipeline are respectively communicated with the fifth buffer port and the first heating part.

In some of these embodiments, the first heating element includes, but is not limited to, a heater.

In some of these embodiments, the first heating circuit and the second heating circuit include, but are not limited to, stainless steel pipes.

Further, the damping unit 100 further comprises a first valve element 130. The first valve element 130 is disposed in a pipeline that communicates with the ammonia gas source and the buffer unit 100, and is used for controlling the opening or closing between the ammonia gas source and the buffer unit 100.

The first valve element 130 is disposed in the intake line.

In some of these embodiments, the first valve element 130 comprises a first manual diaphragm valve. Wherein, a first manual diaphragm valve is arranged on the air inlet pipeline and used for opening or closing the communication between the ammonia gas source and the buffer element 110.

The number of the first manual diaphragm valves is matched with the number of the air inlet pipelines. Typically, the number of first manual diaphragm valves is equal to the number of air intake lines, i.e. the first manual diaphragm valves are in one-to-one correspondence with the air intake lines. It should be noted that the number of the first manual diaphragm valves may be 2, 3, 4, or the like.

Further, the damping unit 100 further comprises a second valve element 140. The second valve element 140 is disposed in a pipeline between the buffer element 110 and the first heating element 120, and is used for controlling the opening or closing between the buffer element 110 and the first heating element 120.

Specifically, the second valve element 140 includes a second manual diaphragm valve and a third manual diaphragm valve. Wherein, the second manual diaphragm valve is arranged on the first heating pipeline and is used for opening or closing the communication between the buffer element 110 and the first heating element; a third manual diaphragm valve is provided in the second heating line for opening or closing the communication of the buffer element 110 with the first heating element.

As shown in fig. 3, the condensing unit 200 includes a condensing element 210. The condensing element 210 is in communication with the buffer unit 100 and is located downstream of the buffer unit 100, and is configured to condense ammonia gas to obtain liquid ammonia.

Specifically, condensing element 210 is in communication with buffer element 110 and is located downstream of buffer element 110.

Specifically, the condensing element 210 includes a condensing member, a first condensing line, and a second condensing tube. Wherein a first end of the first condensing line is in communication with the condensing member, and a second end of the first condensing line is in communication with the second buffer port of the buffer element 110; the first end and the condensate intercommunication of second condensation pipeline, the second end and the finished product jar intercommunication of second condensation pipeline for with liquid ammonia canning.

In some of these embodiments, the condensing element includes, but is not limited to, a condenser.

In some of these embodiments, the first condensing piping and the second condensing tube include, but are not limited to, stainless steel tubes.

As shown in fig. 4, the analysis unit 300 includes a first analysis element 310. Wherein the first analyzing element 310 is in communication with the buffer unit 100 for analyzing ammonia gas of the buffer unit 100.

Specifically, the first analyzing element 310 is in communication with the buffer element 110 for analyzing the ammonia of the buffer element 110.

Specifically, the first analysis element 310 includes a first analysis piece and a first analysis line. Wherein a first end of the first analytical tubing is in communication with the third buffer port of buffer element 110 and a second end of the first analytical tubing is in communication with the first analytical member.

It should be noted that, the first analyzing element 310 may detect the purity of the ammonia gas in the buffer element 110, that is, may convey the ammonia gas into the condensing element 210 for condensation when the purity of the ammonia gas in the buffer element 110 meets the standard, and may recycle the ammonia gas to the three-stage condensing system through the recycling unit 400 when the purity of the ammonia gas in the buffer element 110 does not meet the standard.

In some of these embodiments, the first analytical element includes, but is not limited to, a purity analyzer.

In some of these embodiments, the first analytical line comprises, but is not limited to, a stainless steel tube.

As shown in fig. 5, the recovery unit 400 includes a first recovery element 410 and a second recovery element 420. Wherein the first recovery element 410 communicates the buffer unit 100 with the recovery tank for recovering the liquid ammonia in the buffer unit 100; the second recovery element 420 communicates the buffer unit 100 with the primary condensing system and the tertiary condensing system for recovering ammonia gas in the buffer unit 100.

Specifically, the first recovery element 410 communicates the buffer element 110 with the recovery tank for recovering the liquid ammonia in the buffer element 110; the second recovery element 420 communicates the buffer element 110 with the primary condensing system and the tertiary condensing system for recovering the ammonia gas in the buffer element 110.

Specifically, the first recovery element 410 includes a first recovery line. The first end of the first recovery pipeline is communicated with the sixth buffer port, and the second end of the first liquid recovery pipeline is communicated with the recovery tank.

In some of these embodiments, the first recovery line includes, but is not limited to, stainless steel tubing.

Specifically, the second recovery element 420 includes a second recovery line and a third recovery line. The first end of the second recovery pipeline is communicated with the first condensation pipeline, and the second end of the second recovery pipeline is communicated with the three-stage condensation system; the first end of the third recovery pipeline is communicated with the first recovery pipeline, and the second end of the third recovery pipeline is communicated with the first-stage condensation system.

In some embodiments, the second recovery line, the third recovery line, include, but are not limited to, stainless steel tubing.

Further, the recovery unit 400 further comprises a third valve element 430. The third valve element 430 is disposed in the first recovery line for controlling communication between the buffer element 110 and the recovery tank.

Specifically, the third valve element 430 includes a fourth manual diaphragm valve, a first pneumatic diaphragm valve, and a first one-way valve. The fourth manual diaphragm valve is arranged on the first recovery pipeline and is used for enabling a worker to manually close or open the communication between the buffer element 110 and the recovery tank; the first pneumatic diaphragm valve is arranged on the first recovery pipeline and is positioned at the downstream of the third manual diaphragm valve and is used for switching on or switching off the communication between the buffer element 110 and the first recovery pipeline;

The first check valve is arranged on the first recovery pipeline and positioned at the downstream of the first pneumatic diaphragm valve and is used for preventing the liquid ammonia entering the first recovery pipeline from flowing reversely.

Further, the recovery unit 400 further comprises a fourth valve element 440. The fourth valve element 440 is disposed in the second recovery pipeline and the third recovery pipeline, and is used for controlling the buffer element 110 to be communicated with the first-stage condensation system and the third-stage condensation system.

Specifically, the fourth valve element 440 includes a second one-way valve, a second pneumatic diaphragm valve, and a third one-way valve. The second check valve is arranged on the second recovery pipeline and is used for preventing the ammonia gas entering the second recovery pipeline from flowing back; the second pneumatic diaphragm valve is arranged on the third recovery pipeline and used for opening or closing the communication between the second recovery pipeline and the third recovery pipeline; the third check valve is arranged on the third recovery pipeline and positioned at the downstream of the second pneumatic diaphragm valve and is used for preventing the ammonia gas entering the third recovery pipeline from flowing back.

As shown in fig. 6, the waste discharging unit 500 includes a first waste discharging member 510. Wherein the first waste discharging element 510 communicates the buffer unit 100 with the exhaust gas treatment tank for discharging the contaminated ammonia gas of the buffer unit 100.

Specifically, the first waste element 510 communicates the buffer element 110 with the exhaust treatment tank for discharging the contaminated ammonia gas of the buffer element 110.

Specifically, the first waste element 510 includes a first waste line. Wherein, the first end of the first waste discharge pipeline is communicated with the buffer element 110, and the second end of the first waste discharge pipeline is communicated with the tail gas treatment tank.

In some of these embodiments, the first waste line includes, but is not limited to, stainless steel tubing.

Further, the exhaust unit 500 further includes an exhaust gas treatment element. The exhaust gas treatment element is disposed in the first exhaust pipeline, and is used for treating the polluted ammonia gas in the buffer unit 100.

In some of these embodiments, the exhaust treatment element includes, but is not limited to, NH ₃ A wet scrubber.

Further, the waste unit 500 further includes a fifth valve element 520. The fifth valve element 520 is disposed in the first exhaust pipeline, and is used for controlling the buffer element 110 to communicate with the exhaust gas treatment tank.

Specifically, the fifth valve element 520 includes a third pneumatic diaphragm valve and a fourth one-way valve. Wherein, the third pneumatic diaphragm valve is arranged on the first waste discharge pipeline and is used for opening or closing the communication between the first waste discharge pipeline and the buffer element 110; the fourth one-way valve is arranged on the first waste discharge pipeline and positioned at the downstream of the third pneumatic diaphragm valve and is used for preventing the gas entering the first waste discharge pipeline from flowing backwards.

As shown in fig. 7, the pressure relief unit 600 includes a first pressure relief element 610. The first pressure relief element 610 is in communication with the buffer unit 100, and is configured to perform pressure relief when the pressure of the buffer unit 100 reaches a preset pressure threshold.

Specifically, the first pressure relief element 610 is in communication with the cushioning element 110 for relieving pressure when the pressure of the cushioning element 110 reaches a preset pressure threshold.

Specifically, the first pressure relief element 610 includes a first pressure relief line and a first pressure relief piece. Wherein, the first end of the first pressure relief pipeline is communicated with the buffer element 110, and the second end of the first pressure relief pipeline is communicated with the tail gas treatment tank; the first pressure release piece is arranged on the first pressure release pipeline, and the first pressure release piece can release pressure on the buffer element 110 and the pipeline under the condition that the pressure in the buffer element 110 and the pipeline is greater than 1.5 MPa.

In some of these embodiments, the first pressure relief line includes, but is not limited to, a stainless steel tube.

In some of these embodiments, the first pressure relief member includes, but is not limited to, a relief valve.

Further, the pressure relief unit 600 further comprises a sixth valve element 620. The sixth valve element 620 is disposed in the first pressure relief pipeline, and is used for controlling communication between the buffer element 110 and the exhaust gas treatment tank.

Specifically, sixth valve element 620 includes a fifth pneumatic diaphragm valve and a fifth one-way valve. The fifth pneumatic diaphragm valve is disposed in the first pressure relief pipeline, and is used for opening or closing the communication between the buffer element 110 and the first pressure relief pipeline; the fifth one-way valve is arranged on the first pressure relief pipeline and positioned at the downstream of the fourth pneumatic diaphragm valve and is used for preventing the gas entering the first pressure relief pipeline from flowing backwards.

The application method of the embodiment is as follows:

first gas supply

The first valve element 130 is manually opened to place the ammonia source in communication with the buffer element 110, thereby allowing ammonia gas into the buffer element 110.

(II) Ammonia analysis

The system activates the first analysis element 310 such that the first analysis element 310 analyzes the ammonia gas in the buffer element 110 to determine whether the ammonia gas in the buffer element 110 is contaminated.

(III) first liquid ammonia gasification

The second valve element 140 is manually opened so that liquid ammonia at the bottom of the buffer element 110 enters the first heating element 120, and the system activates the first heating element 120 to heat and gasify the liquid ammonia and re-deliver it into the buffer element 110.

(IV) Ammonia condensation

In the case where the ammonia gas in the buffer member 110 is not contaminated, the system activates the condensing member 210, thereby condensing the ammonia gas entering the condensing member 210 and obtaining liquid ammonia.

Fifth, first liquid ammonia recovery

In the case where the liquid ammonia in the buffer member 110 is contaminated or the liquid ammonia in the buffer member 110 is excessive, the third valve member 430 is opened so that the liquid ammonia can flow into the recovery tank.

Sixth first gas recovery

By opening the fourth valve element 440, the ammonia gas reaching the standard in the buffer element 110 can be introduced into the first-stage condensation system and the third-stage condensation system for re-condensation, so that the recovery of the ammonia gas reaching the standard is realized.

(seventh) first gas discharge

In the event that ammonia gas within the buffer element 110 is contaminated, the fifth valve element 520 is opened so that the contaminated ammonia gas may be passed into the exhaust gas processor.

Eighth first pressure relief

When the pressure in the buffer element 110 and the pipeline exceeds the preset pressure, the system opens the sixth valve element 620, so that the buffer element 110 and the gas in the pipeline are depressurized.

The embodiment has the advantages that the buffer unit is arranged between the ammonia gas source and the condensing unit, so that the buffer unit can buffer the ammonia gas entering the condensing unit, the unstable condition of the pressure of the ammonia gas entering the condensing unit can be solved, the rapid increase and the rapid decrease of the pressure of the ammonia gas are avoided, a more stable and continuous gas source is provided for the condensing unit, and the danger caused by the rapid increase of the pressure in a pipeline for a short time is avoided; by arranging the analysis unit, the ammonia entering the buffer unit can be analyzed to judge whether the ammonia is polluted or not, so that the ammonia reaching the standard is conveyed to the condensation unit, and the polluted ammonia is conveyed to the waste discharge unit; the recovery unit is used for conveying liquid ammonia into the recovery tank under the condition of polluted liquid ammonia in the buffer unit or excessive liquid ammonia in the buffer unit, and conveying the polluted ammonia in the buffer unit to the primary condensation system or the tertiary condensation system; by arranging the pressure relief unit, the pressure is relieved under the condition that the pressure in the buffer unit and the pipeline exceeds the preset pressure, so that the safety of the whole device is ensured.

Example 2

This embodiment is a modified embodiment of embodiment 1.

As shown in fig. 8, the buffer unit 100 further includes a liquid level monitoring element 150. The liquid level monitoring element 150 is disposed on the buffer element 110, and is configured to monitor a liquid level of liquid ammonia in the buffer element 110.

Specifically, the liquid level monitoring element 150 is disposed at a bottom position of a sidewall of the buffer element 110, and is configured to control the recovery unit 400 to be turned on when the liquid ammonia of the buffer element 110 reaches a preset volume, and recover the liquid ammonia of the buffer element 110 into the recovery tank.

In some of these embodiments, the fluid level monitoring element 150 includes, but is not limited to, a fluid level gauge.

As shown in fig. 9, the pressure relief unit 600 further includes a first pressure monitoring element 630. The first pressure monitoring element 630 is disposed on a pipeline in communication with the buffer element 110, and is used for monitoring the pressure of the pipeline.

Specifically, the first pressure monitoring element 630 includes a first pressure gauge and a first pressure sensor. Wherein the first pressure gauge and the first pressure sensor are disposed in a pipeline in communication with the buffer element 110.

It should be noted that, in the case that the pressure in the buffer element 110 monitored by the first pressure monitoring element 630 exceeds 1.3MPa, the system may start the early warning module of the device to perform early warning; in the case that the pressure in the buffer element 110 monitored by the first pressure monitoring element 630 exceeds 1.5MPa, the system opens the pressure relief unit 600 to relieve the pressure of the buffer element 110 and the pipeline, so as to ensure the safety of the whole device.

In addition, the first pressure monitoring element 630 also includes a sixth manual diaphragm valve. Wherein, a fourth manual diaphragm valve is disposed in the pipeline communicated with the first pressure monitoring element 630, for opening or closing the communication between the first pressure monitoring element 630 and the buffer element 110.

As shown in fig. 10, the recovery unit 400 further comprises a second pressure monitoring element 450. The second pressure monitoring element 450 is disposed in a pipeline in communication with the second recovery element 420, and is configured to monitor a pressure of the pipeline.

Specifically, the second pressure monitoring element 450 includes a second pressure gauge and a second pressure sensor. Wherein, second manometer and second pressure sensor set up in the second recovery pipeline.

In addition, the second pressure monitoring element 450 also includes a seventh manual diaphragm valve. Wherein a seventh manual diaphragm valve is provided in the second recovery line for opening or closing communication of the first pressure monitoring element 630 with the first recovery element 410.

The method of use of this embodiment is the same as that of embodiment 1, and will not be described here again.

The embodiment has the advantages that by arranging the liquid level monitoring element, the liquid ammonia volume at the bottom of the buffer element can be monitored, and under the condition of excessive liquid ammonia in the buffer element, the system controls the recovery unit to be started so as to recover the excessive liquid ammonia at the bottom of the buffer element into the recovery tank; through setting up first pressure monitoring element, carry out real-time supervision to the pressure in the buffer element, under the too high circumstances of pressure in buffer element and pipeline, the pressure release unit is opened to the system and is released to buffer element and pipeline to guarantee the security of whole device.

Example 3

This embodiment is a modification of embodiment 1 to embodiment 2.

As shown in fig. 11, the condensing device further includes an evaporation unit 700. The evaporation unit 700 is respectively communicated with the condensation unit 200, the analysis unit 300, the recovery unit 400, the waste discharge unit 500 and the pressure relief unit 600, and is used for acquiring and transmitting liquid ammonia to a finished product tank.

As shown in fig. 12, the evaporation unit 700 includes at least one evaporation element 710 and a second heating element 720. Wherein the evaporation element 710 is in communication with the condensing unit 200 for storing liquid ammonia; the second heating element 720 communicates with the vaporizing element 710 for vaporizing the liquid ammonia within the vaporizing element 710.

Specifically, the evaporation element 710 communicates with the condensation element 210.

Specifically, the evaporation element 710 includes an evaporation tank, a first evaporation port, a second evaporation port, a third evaporation port, a fourth evaporation port, a fifth evaporation port, a sixth evaporation port, and a seventh evaporation port. Wherein, the first evaporation port is arranged at the side part of the evaporation tank and is communicated with the condensing unit 200; the second evaporation port is disposed at a side position of the evaporation tank and communicates with the analysis unit 300; the third evaporation port is arranged at the bottom of the evaporation tank and is communicated with the second heating element 720 for delivering ammonia gas to the evaporation tank; the fourth evaporation port is arranged at the side part of the evaporation tank and communicated with the second heating element 720, and is used for conveying the liquid ammonia to the second heating element 720; the fifth evaporation port is arranged at the bottom of the evaporation tank and is communicated with the recovery unit 400; the sixth evaporation port is disposed at the top of the evaporation tank and communicates with the recovery unit 400; the seventh evaporation port is disposed at the top position of evaporation and communicates with the pressure relief unit 600.

In addition, the number of the evaporation elements 710 is 2, and each of the 2 evaporation elements 710 is respectively communicated with the condensation unit 200, the analysis unit 300, the recovery unit 400, the waste discharge unit 500, and the pressure relief unit 600.

In some embodiments, the number of the evaporation elements 710 may be 3, 4, etc., i.e., the number of the evaporation elements 710 may be set according to actual needs, which is not limited herein.

Specifically, the second heating element 720 includes a second heating member, a third heating circuit, and a fourth heating circuit. The first end of the third heating pipeline is communicated with the second heating element, and the second end of the third heating pipeline is communicated with a third evaporation port of the evaporation tank; the first end of the fourth heating pipeline is communicated with the second heating piece, and the second end of the fourth heating pipeline is communicated with a fourth evaporation port of the evaporation tank.

In some of these embodiments, the second heating element includes, but is not limited to, a heater.

In some embodiments, the third heating circuit, the fourth heating circuit, include, but are not limited to, stainless steel tubing.

It should be noted that the number of the second heating elements 720 is 1. The 1 second heating element 720 is respectively in communication with a number of evaporation elements 710.

Further, the evaporation unit 700 further comprises a seventh valve element 730. The seventh valve element 730 is disposed in a pipeline in communication with the evaporation element 710, and is used for controlling the communication between the condensation element 210, the product tank and the evaporation element 710.

Specifically, seventh valve element 730 includes a fifth pneumatic diaphragm valve and a sixth pneumatic diaphragm valve. Wherein, the fifth pneumatic diaphragm valve is disposed in the second condensation pipeline, and is used for opening or closing the communication between the condensation element 210 and the evaporation element 710; a sixth pneumatic diaphragm valve is provided in the communication line between the evaporation element 710 and the product tank for opening or closing the communication between the evaporation element 710 and the product tank.

Further, the evaporation unit 700 further comprises an eighth valve element 740. The eighth valve element 740 is disposed on the second heating pipeline, and is used for controlling the communication between the evaporation element 710 and the second heating element 720.

Specifically, the eighth valve element 740 includes an eighth manual diaphragm valve and a ninth manual diaphragm valve. Wherein, the eighth manual diaphragm valve is disposed in the third heating pipeline and is used for opening or closing the communication between the evaporation element 710 and the second heating element; a ninth manual diaphragm valve is provided to the fourth heating line for opening or closing communication of the evaporation element 710 with the second heating member.

As shown in fig. 13, the analysis unit 300 further comprises a second analysis element 320. The second analysis element 320 is disposed in the evaporation unit 700, and is used for analyzing liquid ammonia in the evaporation unit 700.

Specifically, the second analysis element 320 is disposed on the evaporation element 710, and is used for analyzing the liquid ammonia of the evaporation element 710.

Specifically, the second analysis element 320 includes a second analysis element and a second analysis line. Wherein the first end of the second analysis pipeline is communicated with the second evaporation port, and the second end of the second analysis pipeline is communicated with the second analysis piece.

It should be noted that, the second analysis element 320 may perform purity detection on the liquid ammonia in the evaporation element 710, that is, may transfer the liquid ammonia to the product tank when the purity of the liquid ammonia in the evaporation element 710 meets the standard; in the case that the purity of the liquid ammonia in the evaporation element 710 does not meet the standard, the system starts the second heating element 720 to heat and gasify the liquid ammonia in the evaporation element 710, and conveys the gasified liquid ammonia to the first-stage condensation system and the third-stage condensation system for condensation; in addition, in the case where the liquid ammonia in the evaporation element 710 is excessive, the liquid ammonia in the evaporation element 710 may also be delivered to the recovery tank.

In some of these embodiments, the second analytical element includes, but is not limited to, a purity analyzer.

In some of these embodiments, the second analytical tubing includes, but is not limited to, stainless steel tubing.

It should be noted that the number of the second analysis elements 320 is adapted to the number of the evaporation elements 710. Generally, the number of second analysis elements 320 is equal to the number of evaporation elements 710, i.e. the second analysis elements 320 are in one-to-one correspondence with the evaporation elements 710.

As shown in fig. 14, the recovery unit 400 further includes a third recovery element 460 and a fourth recovery element 470. Wherein the third recovery element 460 communicates the evaporation unit 700 with the recovery tank for delivering the liquid ammonia in the evaporation unit 700 to the recovery tank; the fourth recovery element 470 communicates the evaporation unit 700 with the primary condensing system, the tertiary condensing system, for delivering the gas within the evaporation unit 700 to the primary condensing system or the tertiary condensing system.

Specifically, the third recovery element 460 communicates the evaporation element 710 with the recovery tank; the fourth recovery element 470 communicates the evaporation element 710 with a primary condensing system, a tertiary condensing system.

Specifically, the third recovery element 460 includes a fourth recovery line. Wherein, the first end of the fourth recovery pipeline is communicated with a fourth evaporation port at the bottom of the evaporation element 710, and the second end of the fourth recovery pipeline is communicated with the recovery tank.

In some of these embodiments, the fourth recovery line includes, but is not limited to, stainless steel tubing.

It should be noted that the number of the third recovery elements 460 is adapted to the number of the evaporation elements 710. Generally, the number of the third recovery elements 460 is equal to the number of the evaporation elements 710, i.e., the third recovery elements 460 are in one-to-one correspondence with the evaporation elements 710.

Specifically, the fourth recovery element 470 includes a fifth recovery line and a sixth recovery line. Wherein, the first end of the fifth recovery pipeline is communicated with a fourth evaporation port at the top of the evaporation element 710, and the second end of the fifth recovery pipeline is communicated with a three-stage condensation system; the first end of the sixth recovery pipeline is communicated with the fifth recovery pipeline, and the second end of the sixth recovery pipeline is communicated with the first-stage condensation system.

In some embodiments thereof, the fifth recovery line, the sixth recovery line include, but are not limited to, stainless steel tubing.

It should be noted that the number of the fourth recovery elements 470 is adapted to the number of the evaporation elements 710. Generally, the number of fourth recovery elements 470 is equal to the number of evaporation elements 710, i.e., the fourth recovery elements 470 are in one-to-one correspondence with the evaporation elements 710.

Further, the recovery unit 400 further comprises a ninth valve element 480. A ninth valve element 480 is provided to the fourth recovery line for controlling communication of the evaporation element 710 with the recovery tank.

Specifically, the ninth valve element 480 includes a tenth manual diaphragm valve, a seventh pneumatic diaphragm valve, and a sixth one-way valve. The tenth manual diaphragm valve is arranged on the fourth recovery pipeline and is used for enabling a worker to manually close or open the communication between the buffer element 110 and the fourth recovery pipeline; a seventh pneumatic diaphragm valve is disposed in the fourth recovery line downstream of the sixth manual diaphragm valve for switching on or off communication of the buffer element 110 with the fourth recovery line; the sixth check valve is arranged on the fourth recovery pipeline and is positioned at the downstream of the seventh pneumatic diaphragm valve and is used for preventing the liquid ammonia entering the fourth pipeline from flowing reversely.

The number of the ninth valve elements 480 is adapted to the number of the third recovery elements 460. Generally, the number of ninth valve elements 480 is equal to the number of third recovery elements 460, i.e., the ninth valve elements 480 are in one-to-one correspondence with the third recovery elements 460.

Further, the recovery unit 400 further comprises a tenth valve element 490. The tenth valve element 490 is disposed in the fifth recovery line and the sixth recovery line, and is used for controlling the communication between the evaporation element 710 and the first condensation system and the third condensation system.

Specifically, the tenth valve element 490 includes an eighth pneumatic diaphragm valve, a seventh one-way valve, a ninth pneumatic diaphragm valve, and an eighth one-way valve. Wherein, the eighth pneumatic diaphragm valve is arranged on the fifth recovery pipeline and is used for opening or closing the communication between the evaporation element 710 and the three-stage condensation system; the seventh one-way valve is arranged on the fifth recovery pipeline and is positioned at the downstream of the eighth pneumatic diaphragm valve and is used for preventing the ammonia gas entering the fifth recovery pipeline from flowing back; a ninth pneumatic diaphragm valve is disposed in the sixth recovery line for opening or closing the communication between the evaporation element 710 and the primary condensing system; the eighth one-way valve is arranged on the sixth recovery pipeline and is positioned at the downstream of the ninth pneumatic diaphragm valve and used for preventing the ammonia gas entering the sixth recovery pipeline from flowing back.

It should be noted that the number of tenth valve elements 490 is adapted to the number of fourth recovery elements 470. Generally, the number of tenth valve elements 490 is equal to the number of fourth recovery elements 470, i.e., the tenth valve elements 490 are in one-to-one correspondence with the fourth recovery elements 470.

As shown in fig. 15, the waste discharging unit 500 further includes a second waste discharging member 530. Wherein the second waste discharging member 530 communicates a pipe between the evaporation unit 700 and the finishing tank with the tail gas treating tank for discharging the contaminated ammonia gas in the pipe.

Specifically, the second waste element 530 communicates the piping between the evaporation element 710 and the finished tank with the tail gas treatment tank.

Specifically, the second waste element 530 includes a second waste line. Wherein a first end of the second waste discharge line is in communication with the line between the evaporation element 710 and the finished canister and a second end of the second waste discharge line is in communication with the tail gas processor.

In some of these embodiments, the second waste line includes, but is not limited to, stainless steel tubing.

Further, the waste unit 500 further includes an eleventh valve element 540. Wherein an eleventh valve element 540 is provided on the second exhaust line for controlling the communication of the line between the evaporation unit 700 and the finishing tank with the exhaust gas processor.

Specifically, the eleventh valve element 540 includes a tenth pneumatic diaphragm valve and a ninth one-way valve. Wherein, the tenth pneumatic diaphragm valve is arranged on the second waste discharge pipeline and is used for opening or closing the pipeline communication between the second waste discharge pipeline and the evaporation element 710 and the finished product tank; the ninth one-way valve is arranged on the second waste discharge pipeline and is positioned at the downstream of the seventh manual diaphragm valve and used for preventing the gas entering the second waste discharge pipeline from flowing backwards.

As shown in fig. 16, pressure relief unit 600 further includes a second pressure relief element 650 and a third pressure relief element 660. The second pressure relief element 650 is in communication with the evaporation unit 700, and is configured to perform pressure relief when the pressure of the evaporation unit 700 reaches a preset pressure threshold; the third pressure relief element 660 is in communication with the line between the evaporation unit 700 and the finished tank for pressure relief in case the pressure in the line reaches a preset pressure threshold.

Specifically, the second pressure relief element 650 includes a second pressure relief line and a second pressure relief piece. Wherein, the first end of the second pressure relief pipeline is communicated with the seventh evaporation port of the evaporation element 710, and the second end of the second pressure relief pipeline is communicated with the tail gas treatment tank; the second pressure release piece is disposed in the second pressure release pipeline, and the second pressure release piece can release pressure of the evaporation element 710 and the pipeline when the pressure in the evaporation element 710 and the pipeline is greater than 1.5 MPa.

In some of these embodiments, the second pressure relief line includes, but is not limited to, a stainless steel tube.

In some of these embodiments, the second pressure relief member includes, but is not limited to, a relief valve.

It should be noted that the number of the second pressure relief elements 650 is adapted to the number of the evaporation elements 710. Generally, the number of second pressure relief elements 650 is equal to the number of evaporation elements 710, i.e. the second pressure relief elements 650 are in one-to-one correspondence with the evaporation elements 710.

Further, the pressure relief unit 600 further comprises a twelfth valve element 670. Wherein the twelfth valve element 670 is disposed on the second pressure relief pipeline for controlling communication between the evaporation element 710 and the exhaust gas treatment device.

Specifically, the twelfth valve element 670 includes an eleventh manual diaphragm valve and a tenth one-way valve. The eleventh manual diaphragm valve is disposed in the second pressure relief pipeline, and is used for opening or closing the communication between the evaporation element 710 and the second pressure relief pipeline; the tenth one-way valve is arranged on the second pressure relief pipeline and positioned at the downstream of the eleventh manual diaphragm valve and is used for preventing the gas entering the second pressure relief pipeline from flowing backwards.

It should be noted that the number of twelfth valve elements 670 is adapted to the number of second pressure relief elements 650. Generally, the number of twelfth valve elements 670 is equal to the number of second pressure relief elements 650, i.e., twelfth valve elements 670 are in one-to-one correspondence with second pressure relief elements 650.

Specifically, third pressure relief element 660 includes a third pressure relief line, a third pressure relief piece, and a rupture disc. Wherein, the first end evaporation unit 700 of the third pressure relief pipeline is communicated with the pipeline between the finished product tanks, and the second end of the third pressure relief pipeline is communicated with the tail gas treatment tank; the third pressure relief piece is arranged on a third pressure relief pipeline, and the pipeline can be subjected to pressure relief under the condition that the pressure in the pipeline is greater than 1.5 MPa; the rupture disk is arranged on the third pressure relief pipeline and is positioned at the upstream of the third pressure relief piece, and the rupture disk is broken down under the condition that the pressure in the pipeline is greater than 1.5MPa, so that the system controls the third pressure relief piece to be opened.

In some of these embodiments, the third pressure relief line includes, but is not limited to, a stainless steel tube.

In some of these embodiments, the third pressure relief member includes, but is not limited to, a relief valve.

Further, the pressure relief unit 600 further comprises a thirteenth valve element 680. The thirteenth valve element 680 is disposed in the third pressure relief pipeline, and is used for controlling the communication between the pipeline between the evaporation unit 700 and the finished product tank and the exhaust gas processor.

Specifically, thirteenth valve element 680 includes a twelfth manual diaphragm valve and an eleventh one-way valve. The twelfth manual diaphragm valve is arranged on the third pressure relief pipeline and is used for opening or closing the communication between the pipeline between the evaporation unit 700 and the finished product tank and the tail gas processor; the eleventh one-way valve is arranged on the third pressure relief pipeline and is positioned at the downstream of the twelfth manual diaphragm valve and used for preventing the gas entering the third pressure relief pipeline from flowing backwards.

Further, the condensing apparatus further includes a purge unit 800. The purge unit 800 is in communication with the evaporation unit 700, and is used for purging the evaporation unit 700 and the pipeline.

As shown in fig. 17, the purge unit 800 includes a first purge element 810 and a second purge element 820. Wherein, the first purging element 810 is communicated with an input pipeline of the evaporation unit 700 and is used for purging the evaporation unit 700; the second purge element 820 is in communication with the output line of the evaporation unit 700 for purging the entire apparatus.

Specifically, the first purge element 810 is in communication with the input line of the evaporation element 710; the second purge element 820 is in communication with the output line of the evaporation element 710.

Specifically, the first purge element 810 comprises a first gas supply and a first purge line. Wherein a first end of the first purge line is in communication with a first gas supply, a second end of the first purge line is in communication with the evaporation element 710, and the first gas supply is for supplying a purge gas.

The purge gas supplied from the first gas supply member is GN ₂ (namely, the nitrogen with the purity of more than 99.999 percent).

It should be noted that the number of the first purge lines is adapted to the number of the evaporation elements 710. Typically, the number of first purge lines is equal to the number of evaporation elements 710, i.e. the first purge lines are in one-to-one correspondence with the evaporation elements 710.

Specifically, the second purge element 820 includes a second gas supply and a second purge line. Wherein the first end of the second purge line is in communication with a second gas supply, the second end of the second purge line is in communication with the evaporation element 710, and the second gas supply is for supplying a purge gas.

The purge gas supplied from the second gas supply member is PHe (i.e., helium gas having a purity of 99.999% or higher).

Further, the purge unit 800 further includes a fourteenth valve element 830. Wherein, the fourteenth valve element 830 is disposed in the first purge line for controlling the communication between the first gas supply and the evaporation element 710.

Specifically, fourteenth valve element 830 includes a twelfth one-way valve. Wherein a twelfth check valve is provided with a first purge line for opening or closing the communication of the first gas supply with the evaporation element 710.

It should be noted that the number of fourteenth valve elements 830 is adapted to the number of first purge lines. Generally, the number of fourteenth valve elements 830 is equal to the number of first purge lines, i.e., the fourteenth valve elements 830 are in one-to-one correspondence with the first purge lines.

Further, the purge unit 800 further includes a fifteenth valve element 840. Wherein a fifteenth valve element 840 is provided in the second purge line for controlling communication of the second gas supply with the evaporation element 710.

Specifically, the fifteenth valve element 840 includes an eleventh air operated diaphragm valve and a thirteenth one-way valve. Wherein an eleventh pneumatic diaphragm valve is disposed in the second purge line for opening or closing communication of the second gas supply with the evaporation element 710; a thirteenth one-way valve is disposed in the second purge line downstream of the eleventh pneumatic diaphragm valve for preventing backflow of gas into the second purge line.

The application method of the embodiment is as follows:

ninth, analysis of liquid ammonia

The system opens seventh valve element 730 to open the communication of condensing element 210 with vaporizing element 710 so that liquid ammonia enters vaporizing element 710;

the ninth valve element 480 is manually opened to open the communication between the second analyzing element 320 and the vaporizing element 710 so that the second analyzing element 320 can analyze the liquid ammonia in the vaporizing element 710.

(ten) liquid ammonia delivery

In the event that liquid ammonia meets the criteria, the system opens seventh valve element 730 to open the communication of vaporizing element 710 with the finished tank so that the finished tank can be filled with liquid ammonia meeting the criteria.

(eleven) second liquid ammonia gasification

In the event that liquid ammonia is not compliant, the system opens eighth valve element 740 to open communication between vaporizing element 710 and second heating element 720;

The system turns on the second heating element 720 to vaporize the liquid ammonia in the vaporization element 710.

(twelve) second liquid ammonia recovery

In the event that there is too much or contaminated liquid ammonia in vaporization element 710, the system opens ninth valve element 480 to open the recovery tank to communicate with vaporization element 710 so that liquid ammonia in vaporization element 710 is delivered into the recovery tank.

Thirteenth second gas recovery

In the case that the liquid ammonia does not meet the standard, the system opens the ninth valve element 480 to open the first condensation system, the third condensation system, and the evaporation element 710, so that the gas gasified by the second heating element 720 can be delivered to the first condensation system or the third condensation system for condensation.

(fourteen) second gas discharge

In the event that liquid ammonia is not in compliance, the system opens tenth valve element 490 so that gas entering the conduit between vaporizing element 710 and the finished tank can be vented to the exhaust gas processor through second waste element 530.

Fifteen second pressure relief

In the event that the pressure within the evaporation element 710 exceeds a preset pressure threshold, the system opens the eleventh valve element 540 such that the second pressure relief element 650 can relieve pressure from the evaporation element 710;

In the event that a preset pressure threshold is exceeded in the conduit between the evaporation element 710 and the finished tank, the system opens the twelfth valve element 670 so that the third pressure relief element 660 can relieve the conduit.

Sixteen purge

In the event that purging of the evaporation element 710 is desired, the system activates the first purge element 810, opening the fourteenth valve element 830 so that the purge gas can purge the evaporation element 710;

in the event that purging of the entire apparatus is desired, the system activates the second purge element 820, opening the fifteenth valve element 840 so that the purge gas may purge the entire apparatus.

The embodiment has the advantages that the evaporation element is arranged, so that the liquid ammonia obtained through the condensation element can be introduced into the evaporation element, the second analysis element can analyze the liquid ammonia in the evaporation element, the second heating element can be started to gasify the liquid ammonia in the evaporation element under the condition that the liquid ammonia in the evaporation element does not meet the standard, the gas is conveyed to the primary condensation system or the tertiary condensation system for condensation through the recovery unit, and the liquid ammonia in the evaporation element can be recovered to the recovery tank, so that the liquid ammonia is recovered and purified again under the condition that the ammonia is polluted in the condensation process; through setting up second decompression component and third decompression component, carry out the pressure release to evaporation component and pipeline, can guarantee the security of whole device.

Example 4

This embodiment is a modified embodiment of embodiment 3.

As shown in fig. 18, the pressure relief unit 600 further includes a third pressure monitoring element 690. The third pressure monitoring element 690 is disposed in a pipeline in communication with the evaporation element 710, and is used for monitoring the evaporation element 710 and the pressure in the pipeline.

Specifically, the third pressure monitoring element 690 includes a third pressure gauge and a third pressure sensor. Wherein the third pressure gauge and the third pressure sensor are disposed in a pipeline in communication with the evaporation element 710.

It should be noted that, when the pressure in the evaporation element 710 monitored by the third pressure monitoring element 690 exceeds 1.3MPa, the system may start the early warning module of the device to perform early warning; in the case that the pressure in the evaporation element 710 monitored by the third pressure monitoring element 690 exceeds 1.5MPa, the system opens the second pressure relief element 650 to relieve the pressure in the evaporation element 710, so as to ensure the safety of the whole device.

In addition, the first pressure monitoring element 630 also includes a thirteenth manual diaphragm valve. Wherein a thirteenth manual diaphragm valve is disposed in the line in communication with the third pressure monitoring element 690 for opening or closing the communication of the third pressure monitoring element 690 with the evaporation element 710.

As shown in fig. 19, the purge unit 800 further includes a fourth pressure monitoring element 850. The fourth pressure monitoring element 850 is disposed in a pipeline communicating with the first purge element 810 and the second purge element 820, and is used for monitoring the pressure in the pipeline.

Specifically, the fourth pressure monitoring element 850 includes a fourth pressure gauge and a fourth pressure sensor. Wherein the fourth pressure gauge and the fourth pressure sensor are disposed in a line in communication with the second purge element 820.

It should be noted that, when the pressure in the second purge line monitored by the fourth pressure monitoring element 850 exceeds 1.3MPa, the system may start the early warning module of the device to perform early warning; under the condition that the pressure in the second purging pipeline monitored by the fourth pressure monitoring element 850 exceeds 1.5MPa, the system opens the third pressure relief element 660 to relieve the pressure of the second purging pipeline, so that the safety of the whole device is ensured.

In addition, the fourth pressure monitoring element 850 also includes a fourteenth manual diaphragm valve. Wherein a fourteenth manual diaphragm valve is provided in the line communicating with the fourth pressure monitoring element 850 for opening or closing the communication of the fourth pressure monitoring element 850 with the second purge line.

The method of use of this embodiment is the same as that of embodiment 3, and will not be described here again.

The advantage of this embodiment is that by setting the third pressure monitoring element and the fourth pressure monitoring element, the pressure in the evaporation element 710, i.e. the pipeline, is monitored in real time, and under the condition that the pressure in the evaporation element and the pipeline is too high, the system can open the pressure relief unit to relieve the pressure of the evaporation element and the pipeline, thereby ensuring the safety of the whole device.

Example 5

The embodiment relates to a condensing method, which is applied to condensing devices in embodiments 1-4.

In one exemplary embodiment of the invention, a condensation process comprises:

(one) purging

The system activates the first purge element 810, the second purge element 820, and opens the fourteenth valve element 830, the fifteenth valve element 840 so that the purge gas can purge the evaporation element 710 as well as the entire apparatus.

(II) gas supply

(III) Ammonia analysis

(IV) first liquid ammonia gasification

(V) Ammonia condensation

Sixth, first liquid ammonia recovery

(seventh) first gas recovery

Eighth first gas discharge

(nine) first pressure relief

(ten) liquid ammonia analysis

Eleven liquid ammonia delivery

(twelve) second liquid ammonia gasification

Thirteenth second liquid ammonia recovery

(fourteen) second gas recovery

In the case that the liquid ammonia does not meet the standard, the system opens the ninth valve element 480 to open the first condensation system, the third condensation system and the evaporation element 710, so that the gas gasified by the second heating element 720 can be transferred to the first condensation system or the third condensation system for condensation.

Fifteen second gas emissions

Sixteen second pressure relief

In the event that the pressure within the evaporation element 710 exceeds a preset pressure threshold, the system opens the twelfth valve element 670 so that the second pressure relief element 650 can relieve pressure from the evaporation element 710;

in the event that a preset pressure threshold is exceeded in the conduit between the evaporation element 710 and the finished tank, the system opens the thirteenth valve element 680 so that the third pressure relief element 660 can relieve the conduit.

More specifically, the condensation method of the present embodiment is as follows:

(1) The system activates the first purge element 810, the second purge element 820, opens the eleventh pneumatic diaphragm valve, the fifth manual diaphragm valve so that purge gas can enter the evaporation element 710 and the pipeline through the twelfth one-way valve, the thirteenth one-way valve, and purges the evaporation element 710 and the whole device.

(2) The first manual diaphragm valve is manually opened to place the ammonia gas source in communication with the buffer element 110, thereby allowing ammonia gas into the buffer element 110.

(3) The system activates the first analysis element 310 such that the first analysis element 310 analyzes the ammonia gas in the buffer element 110 to determine whether the ammonia gas in the buffer element 110 is contaminated.

(4) The second manual diaphragm valve is opened manually so that liquid ammonia at the bottom of the buffer element 110 enters the first heating element 120, and the system activates the first heating element 120 to heat and gasify the liquid ammonia and re-deliver the liquid ammonia into the buffer element 110.

(5) In the case where the ammonia gas in the buffer member 110 is not contaminated, the system activates the condensing member 210, thereby condensing the ammonia gas entering the condensing member 210 and obtaining liquid ammonia.

(6) In the case that the liquid ammonia in the buffer element 110 is contaminated or the liquid ammonia in the buffer element 110 is excessive, the third manual diaphragm valve and the first pneumatic diaphragm valve are opened so that the liquid ammonia can flow into the recovery tank through the first check valve.

(7) The ammonia gas reaching the standard in the buffer element 110 can be introduced into the three-stage condensation system through the second one-way valve for re-condensation, so that the recovery of the ammonia gas reaching the standard is realized.

(8) The second pneumatic diaphragm valve is opened, and the ammonia gas reaching the standard in the buffer element 110 can be introduced into the first-stage condensation system through the third one-way valve to be condensed again.

(9) In case the ammonia gas in the buffer element 110 is contaminated, the third pneumatic diaphragm valve is opened so that the contaminated ammonia gas can be led to the exhaust gas processor through the fourth one-way valve.

(10) Under the condition that the pressure in the buffer element 110 and the pipeline exceeds the preset pressure, the system opens the fourth pneumatic diaphragm valve, so that the gas in the buffer element 110 and the pipeline can be decompressed through the first decompression piece and the fifth one-way valve.

(11) In the case that the ammonia gas detected by the first analysis element 310 meets the standard, the system opens the fifth pneumatic diaphragm valve to open the communication between the condensation element 210 and the evaporation element 710, so that the liquid ammonia enters the evaporation element 710;

the sixth manual diaphragm valve is manually opened to open the communication between the second analyzing element 320 and the vaporizing element 710 so that the second analyzing element 320 can analyze the liquid ammonia in the vaporizing element 710.

(12) In the event that liquid ammonia meets the criteria, the system opens a sixth pneumatic diaphragm valve to open the communication of evaporation element 710 with the finished tank so that the finished tank can be filled with liquid ammonia meeting the criteria.

(13) In the event that liquid ammonia does not meet the criteria, the system opens the fifth manual diaphragm valve and activates the second heating element 720 to open the communication of the vaporizing element 710 with the second heating element 720, thereby vaporizing the liquid ammonia within the vaporizing element 710.

(14) In the event that there is too much or contaminated liquid ammonia in the evaporation element 710, the system opens the sixth manual diaphragm valve, the seventh pneumatic diaphragm valve, to open the recovery tank to communicate with the evaporation element 710 so that liquid ammonia in the evaporation element 710 can be delivered into the recovery tank through the sixth one-way valve.

(15) In the case that the liquid ammonia does not meet the standard, the system opens the eighth pneumatic diaphragm valve to open the communication between the first-stage condensing system and the evaporation element 710, so that the gas gasified by the second heating element 720 can be conveyed to the first-stage condensing system through the seventh one-way valve for condensation;

the ninth air-operated diaphragm valve may also be opened to open the communication between the tertiary condensing system and the evaporation element 710, so that the gas vaporized through the second heating element 720 may be delivered to the tertiary condensing system through the eighth one-way valve for condensation.

(16) In the event that liquid ammonia does not meet the criteria, the system opens the tenth pneumatic diaphragm valve so that gas entering the conduit between vaporizing element 710 and the finishing tank can be vented to the tail gas processor through the ninth one-way valve.

(17) In the event that the pressure within the evaporation element 710 exceeds a preset pressure threshold, the system opens a seventh manual diaphragm valve, allowing the evaporation element 710 to be depressurized through a second venting member, a tenth one-way valve.

(18) In the event that a preset pressure threshold is exceeded in the conduit between the evaporation element 710 and the finished tank, the system opens an eighth manual diaphragm valve, venting the conduit through a third venting member, an eleventh one-way valve.

Example 6

This example is a specific embodiment of the present invention, and corresponds to examples 1 to 4.

A condensing system comprises a buffer module, a condensing module, an analysis module, a recovery module, a waste discharge module, a pressure relief module, an evaporation module and a purging module.

The BUFFER module comprises a BUFFER column (BUFFER-1), a heater (H-01), manual diaphragm valves (MV 01, MV02, MV03 and MV 04), a liquid level meter (LS 01), a pressure gauge (PG 01) and a pressure sensor (PT 01).

Wherein the condensing module includes a condenser (C-1211).

Wherein the analysis module comprises an analyzer (TIA 01, TIA 02).

The recovery module comprises manual diaphragm valves (MV 05, MV011, MV 19), pneumatic diaphragm valves (AV 01, AV04, AV06, AV07, AV08, AV12, AV13, AV 015), one-way valves (CV 04, CV06, CV08, CV09, CV010, CV13, CV14, CV15, CV 19), pressure gauges (PG 02) and pressure sensors (PT 02).

Wherein the waste discharge module comprises a pneumatic diaphragm valve (AV 02), a one-way valve (CV 02, CV 17) and a manual diaphragm valve (MV 27)

The pressure relief module comprises manual diaphragm valves (MV 07, MV15, MV23 and MV 26), safety valves (SV 01, SV02, SV03 and SV 04), one-way valves (CV 03, CV07, CV11 and CV 16) and rupture disks (PRD).

The evaporation module comprises an evaporation tank (V-1212A, V-1212B), a heater (H-02), manual diaphragm valves (MV 10, MV12, MV18, MV 20), pneumatic diaphragm valves (AV 05, AV09, AV11, AV 14), pressure gauges (PG 03, PG 04) and pressure sensors (PT 03, PT 04).

The purging module comprises a purging gas (1 ST rebailer ZONE, ABSORBER ZONE), a pneumatic diaphragm valve (AV 17), one-way valves (CV 05, CV12, CV 18), a pressure gauge (PG 05) and a pressure sensor (PT 05).

The application method of the embodiment is as follows:

(1) The system starts ST rebiler ZONE, absorper ZONE, opens AV17, MV10, MV18 so that purge gas can enter V-1212A, V-1212B and the piping through CV05, CV12, CV18 and purge V-1212A, V-1212B and the whole plant.

(2) MV01 and MV02 are manually opened, so that ABSORBER PACKAGE is communicated with BUFFER-1, and ammonia gas enters BUFFER-1.

(3) The system starts TIA01, so that TIA01 analyzes ammonia in BUFFER-1 to judge whether the ammonia in BUFFER-1 is polluted or not.

(4) And manually opening MV03 and MV04 to enable liquid ammonia at the bottom of the BUFFER-1 to enter H-01, starting the system to start the H-01, heating and gasifying the liquid ammonia and conveying the liquid ammonia into the BUFFER-1 again.

(5) In the case where the ammonia gas in BUFFER-1 is not contaminated, the system starts up C-1211, thereby condensing the ammonia gas entering C-1211 and obtaining liquid ammonia.

(6) In case that the liquid ammonia in BUFFER-1 is contaminated or the liquid ammonia in BUFFER-1 is excessive, MV05, AV01 is opened so that the liquid ammonia can flow into the recovery tank through CV 19.

(7) Excessive ammonia reaching the standard in BUFFER-1 can be introduced into a three-stage condensing system through CV04 to be condensed again, so that the recovery of the ammonia reaching the standard is realized.

(8) The AV06 is opened and the ammonia gas reaching the standard in the buffer element 110 can be further introduced into the primary condensing system through the CV10 to be condensed again.

(9) In case the ammonia gas in BUFFER-1 is contaminated, AV02 is opened so that the contaminated ammonia gas can be led to the exhaust gas processor through CV 02.

(10) When the pressure in the BUFFER-1 and the pipeline exceeds the preset pressure, the system opens MV07 so that the BUFFER element 110 and the gas in the pipeline can be depressurized through SV01 and CV 03.

(11) In the case that the ammonia gas detected by TIA01 meets the standard, the system opens AV09 to open the communication between C-1211 and V-1212A, V-1212B, so that liquid ammonia enters V-1212A, V-1212B;

the system starts TIA02 so that TIA02 can analyze the liquid ammonia in V-1212A, V-1212B.

(12) In the case that the liquid ammonia meets the standard, the system opens AV14 to open V-1212A, V-1212B communication with the finishing tank so that the finished tank can be filled with the liquid ammonia meeting the standard.

(13) In the case that the liquid ammonia does not meet the standard, the system opens MV10, MV12, MV18, MV20 and starts H-02 to open the communication between the V-1212A, V-1212B element and H-02, thereby gasifying the liquid ammonia in V-1212A, V-1212B.

(14) In the event that the liquid ammonia in V-1212A, V-1212B is too much or contaminated, the system opens MV11, AV04, MV19, AV15 to open the recovery tank to V-1212A, V-1212B so that the liquid ammonia in V-1212A, V-1212B can be transported into the recovery tank through CV06, CV 13.

(15) Under the condition that the liquid ammonia does not meet the standard, the system opens AV08 to open the communication between the three-stage condensation system and V-1212A, V-1212B, so that the gas gasified by H-02 can be conveyed to the three-stage condensation system for condensation through CV 08;

AV08, AV07 may also be opened to open the primary condensing system to V-1212A, V-1212B so that H-02 vaporized gas may be transported to the tertiary condensing system via CV09 for condensation.

(16) In the event that liquid ammonia does not meet the criteria, the system opens AV16 so that gas entering the conduit between V-1212A, V-1212B and the finishing tank can be vented to the tail gas processor through CV 17.

(17) In the event that the pressure within V-1212A, V-1212B exceeds a preset pressure threshold, the system opens MV15, MV23, and the evaporation element 710 may be depressurized via SV02, CV07, SV03, CV 11.

(18) In the event that a preset pressure threshold is exceeded in the conduit between V-1212A, V-1212B and the finished tank, the system opens MV26 and PRD is broken down, causing SV04, CV16 to vent the conduit.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A condensing device for condensing ultra-pure ammonia gas, comprising:

the pressure relief unit is communicated with the buffer unit and is used for relieving pressure when the pressure of the buffer unit reaches a preset pressure threshold value;

the evaporation unit is respectively communicated with the condensation unit, the analysis unit, the recovery unit, the waste discharge unit and the pressure relief unit and is used for acquiring and transmitting liquid ammonia to a finished product tank;

the purging unit is communicated with the evaporation unit and is used for purging the evaporation unit and the pipeline;

wherein, the buffer unit includes:

the first heating element is communicated with the buffer element and is used for heating and gasifying liquid ammonia generated by the buffer element due to ammonia condensation;

wherein the analysis unit includes:

a first analysis element in communication with the buffer unit for analyzing ammonia gas of the buffer unit;

2. The condensing device of claim 1, wherein the condensing unit comprises:

the condensing element is communicated with the buffer unit and positioned at the downstream of the buffer unit and is used for condensing ammonia gas to obtain liquid ammonia; and/or

The recovery unit includes:

a first recovery element which communicates the buffer unit with a recovery tank for recovering liquid ammonia of the buffer unit;

The second recovery element is used for communicating the buffer unit with the first-stage condensation system and the third-stage condensation system and recovering ammonia gas of the buffer unit; and/or

The waste discharging unit includes:

the first waste discharge element is used for communicating the buffer unit with the tail gas treatment tank and discharging the polluted ammonia gas of the buffer unit; and/or

The pressure relief unit includes:

3. The condensing device of claim 2, wherein the buffer unit further comprises:

the liquid level monitoring element is arranged on the buffer element and is used for monitoring the liquid level of liquid ammonia of the buffer element; and/or

The pressure relief unit further includes:

the first pressure monitoring element is arranged on a pipeline communicated with the buffer unit and is used for monitoring the pressure of the pipeline; and/or

The recovery unit further includes:

4. A condensation device according to claim 1, wherein,

the recovery unit further includes:

the fourth recovery element is used for communicating the evaporation unit with the first-stage condensation system and the third-stage condensation system and conveying the gas of the evaporation unit to the first-stage condensation system or the third-stage condensation system; and/or

The waste discharge unit further includes:

the second waste discharge element is used for communicating a pipeline between the evaporation unit and the finished product tank with the tail gas treatment tank and discharging polluted ammonia in the pipeline; and/or

The pressure relief unit further includes:

the third pressure relief element is communicated with a pipeline between the evaporation unit and the finished product tank and is used for relieving pressure when the pressure in the pipeline reaches a preset pressure threshold value; and/or

The evaporation unit includes:

5. The condensing device of claim 4, wherein the pressure relief unit further comprises:

6. The condensing device of claim 1, wherein the purge unit comprises:

7. The condensing device of claim 6, wherein the purge unit further comprises:

and the fourth pressure monitoring element is arranged on a pipeline which is respectively communicated with the first purging element and the second purging element and is used for monitoring the pressure in the pipeline.

8. A condensation method, characterized in that it is applied to a condensation device according to any one of claims 1 to 7.