CN214335564U - Device for controlling chloride ion content of urea high-pressure temperature-regulating water - Google Patents
Device for controlling chloride ion content of urea high-pressure temperature-regulating water Download PDFInfo
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- CN214335564U CN214335564U CN202120566154.2U CN202120566154U CN214335564U CN 214335564 U CN214335564 U CN 214335564U CN 202120566154 U CN202120566154 U CN 202120566154U CN 214335564 U CN214335564 U CN 214335564U
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Abstract
The utility model discloses a urea high pressure thermoregulation water chloride ion content controlling means, including on-line monitoring device and controlling means, on-line monitoring device sets up on the high pressure thermoregulation water outlet line of high pressure scrubber, controlling means sets up on the high pressure thermoregulation water inlet line of high pressure scrubber. The online monitoring device is provided with a stop valve from front to back respectively according to the flow, samples and leads to drench on the spot, and coil heat exchanger, thermometer, conductivity meter, controlling means includes current limiting device, pneumatic control valve, discharges the funnel, and online monitoring device and controlling means all are connected with well accuse DCS system. The utility model discloses the flow is simple, and the reliability is high, and all equipment acquire easily, and economic suitability is good, can be according to the effectual chloride ion content control with high pressure temperature-regulating water of technology demand in certain extent.
Description
Technical Field
The utility model belongs to the technical field of the urea technology, a controlling means is related to, concretely relates to urea high pressure temperature regulating water chloride ion content controlling means.
Background
In the urea process by the carbon dioxide stripping method, a high-pressure washing tower is one of important devices of a high-pressure ring, and plays a role in recovering unreacted ammonia and carbon dioxide in a synthesis tower, the ammonia and the carbon dioxide react in the device to generate the methylammonium, and the heat of a byproduct is taken away by high-pressure temperature-adjusting water.
In actual production, because the high-pressure temperature-adjusting water is a relatively closed circulating system, only water can be supplemented and water cannot be drained in the normal production process, along with the increase of the running time, the water quality of the high-pressure temperature-adjusting water is deteriorated due to various reasons and is mainly reflected in the increase of substances such as chloride ions and the like. The increased chlorine ions in the high-pressure temperature-regulating water can cause uniform corrosion, intergranular corrosion, crevice corrosion, pitting corrosion and other corrosion to equipment pipelines, particularly chlorine salt deposition is easily generated in crevices between heat exchange tubes and baffles of a high-pressure washer heat exchanger, and the corrosion to the heat exchange tubes and tube plates is very serious. In domestic fertilizer enterprises, the shutdown of a urea system caused by the leakage of a heat exchange pipe of a high-pressure scrubber occurs for many times, so that serious economic loss is caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure, convenient to use, safe and reliable can be according to the effectual urea high pressure temperature regulating water chloride ion content controlling means with high pressure temperature regulating water control in certain extent of technology demand.
In order to realize the purpose, the technical scheme of the utility model is that: the device for controlling the content of chloride ions in the urea high-pressure temperature-regulating water is provided, wherein: the device comprises an online monitoring device and a control device, wherein the online monitoring device is arranged on a high-pressure temperature-regulating water outlet pipeline of a high-pressure washer, and the control device is arranged on a high-pressure temperature-regulating water inlet pipeline of the high-pressure washer; the on-line monitoring device is respectively provided with an on-line monitoring device cut-off valve, an on-site sampling and sprinkling guide, a coiled heat exchanger, a conductivity meter and a transmitter from front to back according to the flow; the control device is respectively provided with a flow limiting device, a pneumatic regulating valve and a discharge funnel from front to back according to the flow; and the online monitoring device and the control device are both connected with the central control DCS system. The central control DCS system controls the opening of the pneumatic regulating valve through data collected by the conductivity meter, an analyst samples periodically at a local sampling point, and an analysis result is collated with the conductivity meter, so that the reliability of the high-pressure temperature-regulating water chloride ion content control device is ensured.
Furthermore, a thermometer is arranged between the coil type heat exchanger and the conductivity meter, the high-pressure temperature-regulating water flows out and then is cooled through the coil type heat exchanger, and the temperature is displayed by the thermometer.
Further, the flow limiting device is a discharge cut-off valve, and the maximum amount of the high-pressure temperature-regulating water discharged outwards is limited through the opening degree of the discharge cut-off valve.
Furthermore, the coiled heat exchanger adopts circulating cooling water for cooling, in order to prevent pipeline blockage, the circulating cooling water flows through a shell pass, and high-pressure temperature-regulating water flows through a tube pass. In order to ensure the heat exchange effect, an exhaust valve is arranged on the shell side of the coil type heat exchanger, and scale should be periodically cleaned on the shell side.
Furthermore, the circulating cooling water pipeline of the coil type heat exchanger is provided with the regulating valve, so that the water quantity can be conveniently regulated when the environmental temperature changes and the shell side scales.
Furthermore, a regulating valve is arranged in front of the conductivity meter to regulate the flow of the high-pressure temperature-regulating water entering the conductivity meter.
Furthermore, the pneumatic control valve is closed in case of accident and is provided with a hand wheel so as to reduce the influence on the high-pressure temperature regulating water system when the instrument system breaks down.
Furthermore, a water replenishing pipeline is arranged on a high-pressure temperature-adjusting water inlet pipeline of the high-pressure washer.
Further, a high point vent line is provided on the heat exchanger shell side of the high pressure scrubber.
Furthermore, a flow limiting orifice plate is arranged on a high-point exhaust pipeline on the shell side of the high-pressure scrubber heat exchanger.
The utility model discloses urea high pressure thermoregulation water chloride ion content controlling means has following beneficial effect:
1. the utility model discloses structural design is simple, convenient to use, safe and reliable, and all equipment acquire easily, and economic suitability is good.
2. The utility model discloses the current limiting device is adopted to the emission mode, reduces the influence to the system, and the trip valve can with conductance appearance automatic connection, convenient to use.
3. The utility model discloses a carry out high pressure temperature adjusting water moisturizing, exhaust and discharge process to high pressure scrubber, adjusted the content of the aquatic chloride ion that adjusts the temperature of high pressure in the high pressure scrubber effectively, not only improved the quality of water of high pressure temperature adjusting water, still improved the life of equipment.
Drawings
FIG. 1 is a schematic structural view of a chloride ion content control device for high-pressure temperature-regulated urea water according to the present invention;
in the figure: 1. a trip valve of an online monitoring device; 2. sampling and draining on site; 3. a coil heat exchanger; 4. a thermometer; 5. a conductivity meter; 6. a transmitter; 7. a discharge shut-off valve; 8. a pneumatic regulating valve; 9. a discharge hopper; 10. an exhaust line; 11. a high pressure scrubber; 12. and (5) water replenishing pipelines.
Detailed Description
In order to explain the technical content and the structural characteristics of the device for controlling the chloride ion content of the urea high-pressure temperature-regulating water of the present invention in detail, the following description is made with reference to the accompanying drawings.
As shown in fig. 1, the utility model discloses urea high pressure thermoregulation water chloride ion content controlling means, including on-line monitoring device and controlling means, on-line monitoring device sets up on the high pressure thermoregulation water outlet pipe line of high pressure scrubber 11, controlling means sets up on the high pressure thermoregulation water inlet pipe line of high pressure scrubber 11.
The on-line monitoring device is respectively provided with an on-line monitoring device cut-off valve 1, an on-site sampling and sprinkling guide 2, a coil type heat exchanger 3, a thermometer 4, a conductivity meter 5 and a transmitter 6 from front to back according to the flow. The high-pressure temperature-adjusting water flows out and then is cooled through the coil type heat exchanger 3, and the temperature is displayed by the thermometer 4. The coiled heat exchanger 3 adopts circulating cooling water for cooling, and in order to prevent pipeline blockage, the circulating cooling water flows through a shell pass, and high-pressure temperature-regulating water flows through a tube pass. In order to ensure the heat exchange effect, an exhaust valve is arranged on the shell side of the coil type heat exchanger 3, and scale should be periodically cleaned on the shell side. The circulating cooling water pipeline of the coil type heat exchanger 3 is provided with the regulating valve, and when the environmental temperature changes and the shell side scales, the water quantity can be conveniently regulated. The regulating valve is arranged in front of the conductivity meter 5 to regulate the flow of the high-pressure temperature-regulating water entering the conductivity meter 5.
The control device is respectively provided with a flow limiting device (a discharge cut-off valve 7), a pneumatic regulating valve 8 and a discharge funnel 9 from front to back according to the flow. The maximum amount of the high-pressure temperature-regulating water discharged outside is limited by the opening degree of the discharge cut-off valve 7. The pneumatic control valve 8 is closed in case of accident and is provided with a hand wheel so as to reduce the influence on the high-pressure temperature regulating water system when the instrument system breaks down.
And the online monitoring device and the control device are both connected with the central control DCS system. The central control DCS system controls the opening of the pneumatic regulating valve 8 through data collected by the conductivity meter 5, an analyst samples at a local sampling point periodically, and an analysis result is corrected with the conductivity meter, so that the reliability of the high-pressure temperature-regulating water chloride ion content control device is ensured.
A high-point exhaust line 10 is provided on the heat exchanger shell side of the high-pressure scrubber 11, and a water supply line 12 is provided on the high-pressure temperature-controlled water inlet line of the high-pressure scrubber 11. And a flow limiting pore plate is arranged on a high-point exhaust pipeline on the shell side of the high-pressure scrubber heat exchanger.
The utility model discloses a work flow as follows:
install on-line monitoring device trip valve 1 on high pressure thermoregulation water outlet line at high pressure scrubber 11, set up behind the valve and take a sample on the spot and lead to drench 2, high pressure thermoregulation water that draws gets into coiled heat exchanger 3 and cool down, the temperature after the cooling is shown by thermometer 4 on the outlet line, when ambient temperature changes or other reasons need be adjusted, through the recirculated cooling water regulating valve control temperature of adjustment coiled heat exchanger 3 in suitable scope, then send to conductivity meter 5, be equipped with flow control valve in front of conductivity meter 5 with the size and the stability of control flow, the data that conductivity meter 5 gathered are sent to the DCS system through changer 6. The DCS system controls the opening of the pneumatic regulating valve 8 through calculation, online replacement of high-pressure temperature-regulating water is achieved, the discharge cut-off valve 7 also plays a role in limiting flow in order to prevent system fluctuation caused by overlarge discharge capacity, and discharged water is recycled through the discharge hopper 9. Because the noncondensable gas is introduced by continuous water replenishing and discharging, the high-point exhaust of the high-pressure washer needs to be opened and discharged periodically so as to ensure the heat exchange effect of the heat exchanger.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. The utility model provides a urea high pressure thermoregulation water chloridion content controlling means which characterized in that: the device comprises an online monitoring device and a control device, wherein the online monitoring device is arranged on a high-pressure temperature-regulating water outlet pipeline of a high-pressure washer, and the control device is arranged on a high-pressure temperature-regulating water inlet pipeline of the high-pressure washer; the on-line monitoring device is respectively provided with an on-line monitoring device cut-off valve, an on-site sampling and sprinkling guide, a coiled heat exchanger, a conductivity meter and a transmitter from front to back according to the flow; the control device is respectively provided with a flow limiting device, a pneumatic regulating valve and a discharge funnel from front to back according to the flow; and the online monitoring device and the control device are both connected with the central control DCS system.
2. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 1, which is characterized in that: and a thermometer is arranged between the coil type heat exchanger and the conductivity meter.
3. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 1, which is characterized in that: the flow limiting device is a discharge cut-off valve and is used for limiting the maximum amount of high-pressure temperature-regulating water discharged outwards.
4. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 1, which is characterized in that: the coiled heat exchanger adopts circulating cooling water for cooling, the circulating cooling water flows through a shell pass, and high-pressure temperature-regulating water flows through a tube pass.
5. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 4, which is characterized in that: and a circulating cooling water pipeline of the coil type heat exchanger is provided with an adjusting valve for adjusting water quantity.
6. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 1, which is characterized in that: and a regulating valve is arranged in front of the conductivity meter.
7. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 1, which is characterized in that: the pneumatic control valve is closed in case of accident and is provided with a hand wheel.
8. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 1, which is characterized in that: and a water replenishing pipeline is arranged on a high-pressure temperature-adjusting water inlet pipeline of the high-pressure washer.
9. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 1, which is characterized in that: a high point vent line is provided on the heat exchanger shell side of the high pressure scrubber.
10. The device for controlling the chloride ion content of the urea high-pressure temperature-regulating water according to claim 1, which is characterized in that: and a flow limiting orifice plate is arranged on a high-point exhaust pipeline on the shell side of the high-pressure scrubber heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120566154.2U CN214335564U (en) | 2021-03-19 | 2021-03-19 | Device for controlling chloride ion content of urea high-pressure temperature-regulating water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120566154.2U CN214335564U (en) | 2021-03-19 | 2021-03-19 | Device for controlling chloride ion content of urea high-pressure temperature-regulating water |
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| Publication Number | Publication Date |
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| CN214335564U true CN214335564U (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120566154.2U Active CN214335564U (en) | 2021-03-19 | 2021-03-19 | Device for controlling chloride ion content of urea high-pressure temperature-regulating water |
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| CN (1) | CN214335564U (en) |
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2021
- 2021-03-19 CN CN202120566154.2U patent/CN214335564U/en active Active
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