CN215585960U - Gas recovery and reprocessing device - Google Patents
Gas recovery and reprocessing device Download PDFInfo
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- CN215585960U CN215585960U CN202121763543.0U CN202121763543U CN215585960U CN 215585960 U CN215585960 U CN 215585960U CN 202121763543 U CN202121763543 U CN 202121763543U CN 215585960 U CN215585960 U CN 215585960U
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Abstract
The utility model belongs to the technical field of reaction gas treatment of aluminum slurry liquid in a reaction tank. A gas recovery and reprocessing device comprises an absorption tower, a packing layer, a gas inlet unit, a circulating pumping unit, a spray water unit, a liquid outlet and an exhaust pipeline, wherein the absorption tower comprises a lower absorption section, a middle absorption section and an upper absorption section which are sequentially arranged from bottom to top; the circulating pumping unit comprises a circulating pump and a heat exchanger, a water inlet of the circulating pump is communicated with the bottom of the corresponding absorption section, and a water outlet of the circulating pump is communicated to the upper part of the packing layer of the corresponding absorption section through the heat exchanger. This application can improve the processing and the absorption to the mist to can carry out secondary recycle to the solution after handling and gaseous, whole production facility treatment effeciency is high, and water resource utilization rate is high, more energy-concerving and environment-protective.
Description
Technical Field
The utility model belongs to the technical field of reaction gas treatment of aluminum slurry in a reaction tank, and particularly relates to a gas recovery and reprocessing device.
Background
In carrying out the production process, the mist that reaction tank aluminium mortar liquid reaction produced, main gas that produces has ammonia, methane, hydrogen sulfide, can form combustible gas to methane and hydrogen wherein, and hydrogen sulfide gas can be through reaction absorption, the ammonia is through forming the aqueous ammonia absorption, however current absorption tower structural design is unreasonable, can't realize gaseous effective absorption and handle, not only consume a large amount of water resources, and solution concentrations such as aqueous ammonia of getting rid of are unstable, need further processing when carrying out secondary use, be unfavorable for the optimization of whole processing procedure, be unfavorable for the secondary recycle to waste gas.
Disclosure of Invention
The utility model aims to solve the problems and the defects, and provides a gas recovery and reprocessing device which is reasonable in structural design, can improve the treatment and absorption of mixed gas, can perform secondary recovery and utilization on the treated solution and gas, is high in treatment efficiency of the whole production equipment, is high in water resource utilization rate, and is more energy-saving and environment-friendly.
In order to realize the purpose, the adopted technical scheme is as follows:
a gas recovery reprocessing apparatus comprising:
the absorption tower comprises a lower absorption section, a middle absorption section and an upper absorption section which are sequentially arranged from bottom to top, wherein a first partition plate and a first overflow pipe are arranged between the middle absorption section and the lower absorption section, and a second partition plate and a second overflow pipe are arranged between the upper absorption section and the middle absorption section;
the packing layers are arranged in the lower absorption section, the middle absorption section and the upper absorption section;
the gas to be treated enters the gas-liquid separator after being cooled by the raw material cooler, a gas outlet of the gas-liquid separator is communicated to the lower part of the packing layer of the lower absorption section, and a liquid outlet of the gas-liquid separator is communicated to the bottom of the lower absorption section or the middle absorption section;
the circulating pumping units are correspondingly arranged on the lower absorption section, the middle absorption section and the upper absorption section and comprise circulating pumps and heat exchangers, a water inlet of each circulating pump is communicated with the bottom of the corresponding absorption section, and a water outlet of each circulating pump is communicated to the upper parts of the packing layers of the corresponding absorption sections through the heat exchangers;
the spray water unit is communicated with the top of the absorption tower;
the liquid outlet is arranged at the bottom of the absorption tower, and a liquid outlet pump is communicated with the liquid outlet through a liquid outlet pipeline; and
an exhaust duct disposed at a top of the absorption tower.
According to the gas recovery and reprocessing device of the present invention, preferably, the gas inlet unit further includes a reaction tank, and after the gas to be processed passes through the reaction tank, the unreacted gas is communicated with the gas inlet of the raw material cooler.
According to the gas recovery and reprocessing device, the gas recovery and reprocessing device preferably further comprises a refrigerant circulating unit, the refrigerant circulating unit comprises a circulating refrigerant liquid inlet pipe and a circulating refrigerant liquid outlet pipe, refrigerant inlets of the raw material cooler and the heat exchanger are connected with the circulating refrigerant liquid inlet pipe, and refrigerant outlets of the raw material cooler and the heat exchanger are connected with the circulating refrigerant liquid outlet pipe.
According to the gas recovery and reprocessing device of the present invention, preferably, the side walls of the lower absorption section, the middle absorption section and the upper absorption section are all provided with liquid level detection sensors.
According to the gas recovery and re-treatment device, the spray water unit preferably comprises a water conveying pipe, a soft water cooler and an intermediate tank, and the water outlet end of the intermediate tank is communicated to the top of the absorption tower.
According to the gas recovery and re-treatment device, a packing layer is preferably arranged in the absorption tower between the water outlet of the spray water unit and the water outlet of the circulating pump in the upper absorption section.
According to the gas recovery and re-treatment device of the utility model, preferably, a spray pipe is connected to the water outlet of the spray water unit and the water outlet of each circulating pump.
By adopting the technical scheme, the beneficial effects are as follows:
this application structural design is reasonable, can improve processing and absorption to the mist to can carry out secondary recycle to the solution after handling and gaseous, whole production facility treatment effeciency is high, and water resource utilization rate is high, more energy-concerving and environment-protective. This application is through carrying out sectional type structural design to the absorption tower, and it can carry out packing absorption many times to gas to make the ammonia in the gas mix with water by furthest, make the gas that the absorption tower got rid of be the combustible gas that ammonia content is few, avoid causing the pollution to the environment when carrying out tail gas reutilization, the concentration of aqueous ammonia can obtain effectual control in addition, is more convenient for carry on subsequent application. This application is through carrying out chemical reaction earlier to mist, and the absorption of packing is carried out again, and the treatment effeciency is high and ejection of compact is effectual, and among its each district's circulation, cooling and the filler absorption process, more can realize relatively independent sectional type and handle, the effectual treatment effeciency and the effect that has improved in the unit space.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the utility model and are not to be construed as limiting the utility model to all embodiments thereof.
FIG. 1 is a schematic structural diagram of a gas recovery and reprocessing apparatus according to an embodiment of the present invention.
Number in the figure:
100 is an absorption tower, 110 is a lower absorption section, 120 is an intermediate absorption section, 130 is an upper absorption section, 141 is a first baffle, 142 is a first overflow pipe, 151 is a second baffle, and 152 is a second overflow pipe;
200 is a filler layer;
310 is a raw material cooler, 320 is a gas-liquid separator;
400 is a reaction tank, 401 is a sodium hydrosulfide neutralizing tank, 402 is a sodium hydroxide circulating pump, and 403 is a sodium hydrosulfide discharging pump;
500 is a circulating pump, 501 is a heat exchanger;
601 is a soft water cooler, 602 is an intermediate tank;
a circulating refrigerant liquid inlet pipe 701 and a circulating refrigerant liquid outlet pipe 702;
801 is a liquid discharge pump, 802 is an exhaust pipeline;
901 is a circulating water upper water pipeline, 902 is a circulating water lower water pipeline, 903 is a mixed ammonia-containing gas pipeline, 904 is a sodium hydroxide solution pipeline, 905 is a steam condensate pipeline, 906 is a saturated steam pipeline, 907 is a soft water pipeline, 909 is a sodium hydrosulfide pipeline, 910 is a liquid level detection sensor.
Detailed Description
Illustrative aspects of embodiments of the utility model are described more fully hereinafter with reference to the accompanying drawings, in which specific embodiments of the utility model are shown. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art.
In the description of the present invention, it should be understood that the terms "first" and "second" are used to describe various elements of the utility model, and are not intended to limit any order, quantity, or importance, but rather are used to distinguish one element from another.
It should be noted that when an element is referred to as being "connected," "coupled," or "connected" to another element, it can be directly connected, coupled, or connected, but it is understood that intervening elements may be present therebetween; i.e., positional relationships encompassing both direct and indirect connections.
It should be noted that the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
It should be noted that terms indicating orientation or positional relationship such as "upper", "lower", "left", "right", and the like, are used only for indicating relative positional relationship, which is for convenience in describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operated in a specific orientation; when the absolute position of the object to be described is changed, the relative positional relationship may also be changed accordingly.
Referring to fig. 1, the application discloses a gas recovery and reprocessing device, which comprises an absorption tower 100, a packing layer 200, a gas inlet unit, a circulating pumping unit, a spray water unit, a liquid outlet and an exhaust pipeline 802, wherein the absorption tower comprises a lower absorption section 110, a middle absorption section 120 and an upper absorption section 130 which are sequentially arranged from bottom to top, a first partition plate 141 and a first overflow pipe 142 are arranged between the middle absorption section 120 and the lower absorption section 110, and a second partition plate 151 and a second overflow pipe 152 are arranged between the upper absorption section 130 and the middle absorption section 120; a filler layer 200 is arranged in each of the lower absorption section 110, the middle absorption section 120 and the upper absorption section 130; the gas inlet unit comprises a raw material cooler 310 and a gas-liquid separator 320, gas to be treated enters the gas-liquid separator 320 after being cooled by the raw material cooler 310, a gas outlet of the gas-liquid separator 320 is communicated with the lower part of the packing layer 200 of the lower absorption section 110, and a liquid outlet of the gas-liquid separator 320 is communicated with the bottom of the lower absorption section 110 or the middle absorption section 120; circulating pumping units are correspondingly arranged on the lower absorption section 110, the middle absorption section 120 and the upper absorption section 130, each circulating pumping unit comprises a circulating pump 500 and a heat exchanger 501, a water inlet of each circulating pump 500 is communicated with the bottom of the corresponding absorption section, and a water outlet of each circulating pump 500 is communicated to the upper part of the corresponding packing layer 200 of the absorption section through the heat exchanger 501; the spray water unit is communicated with the top of the absorption tower 100; the liquid outlet is arranged at the bottom of the absorption tower, and a liquid outlet pump 801 is communicated with the liquid outlet through a liquid outlet pipeline; an exhaust pipe 802 is provided at the top of the absorption tower 100.
The gas inlet unit further comprises a reaction tank 400, and after the gas to be treated passes through the reaction tank 400, the unreacted gas is communicated with the gas inlet of the raw material cooler 310. The method is characterized in that mixed gas generated by reacting aluminum slurry liquid in a reaction tank mainly comprises ammonia gas, methane, hydrogen gas and hydrogen sulfide, and the hydrogen sulfide gas needs to be removed by reacting in the reaction tank, so that a sodium hydrosulfide intermediate tank is arranged, a sodium hydroxide solution is introduced into a sodium hydrosulfide neutralization tank, the sodium hydroxide solution in the sodium hydrosulfide neutralization tank is sprayed into the reaction tank through a sodium hydroxide circulating pump, the mixed gas is introduced into the reaction tank, and the gas and the solution are fully mixed and reacted through a filler layer in the reaction tank, so that the hydrogen sulfide in the reaction tank is removed; and a sodium hydrosulfide discharging pump is further arranged at the lower part of the sodium hydrosulfide neutralizing tank and used for replacing and discharging the solution, a heat exchange pipeline is arranged in the sodium hydrosulfide intermediate tank in order to ensure the reaction temperature, and saturated steam is introduced into the heat exchange pipeline or the solution is heated by electric heating. The mixed gas after hydrogen sulfide removal enters a raw material cooler for further treatment.
Further, because the condensation of the vapor that contains the ammonia in order to improve among the reaction process, this application is at corresponding position equipartition heat exchanger to refrigerant circulation unit has been arranged in unison, refrigerant circulation unit includes circulation refrigerant feed liquor pipe and circulation refrigerant drain pipe, the refrigerant import of raw materials cooler and heat exchanger all through the branch pipe with circulation refrigerant feed liquor union coupling, the refrigerant export of raw materials cooler and heat exchanger all through the branch pipe with circulation refrigerant drain pipe is connected. In order to further realize temperature control, temperature detection sensors are arranged at spraying liquid outlets of the raw material cooler and the heat exchanger, and control valves are arranged on branch pipes of corresponding circulating refrigerant liquid outlet pipes, so that the flow of the refrigerant is controlled, and the temperature is adjusted.
Further, all be provided with liquid level detection sensor on the lateral wall of the lower absorption section of this application, well absorption section and last absorption section for observe the liquid level, the liquid level detection sensor of lower absorption section simultaneously can also be used for controlling the action of flowing back pump.
The spray water unit comprises a water conveying pipe, a soft water cooler and an intermediate tank, wherein the water outlet end of the intermediate tank is communicated to the top of the absorption tower. The intermediate tank can avoid the water flow change in the spraying process, improve the overall stability and facilitate the adaptability adjustment of the whole process.
The utility model provides a be provided with the packing layer in the absorption tower between the delivery port of spray water unit and the delivery port of circulating pump in last absorption section, and in order to improve the homogeneity that sprays, all be connected with the shower at the delivery port of spray water unit, the delivery port of each circulating pump.
This application structural design is reasonable, can improve processing and absorption to the mist to can carry out secondary recycle to the solution after handling and gaseous, whole production facility treatment effeciency is high, and water resource utilization rate is high, more energy-concerving and environment-protective. This application is through carrying out sectional type structural design to the absorption tower, and it can carry out packing absorption many times to gas to make the ammonia in the gas mix with water by furthest, make the gas that the absorption tower got rid of be the combustible gas that ammonia content is few, avoid causing the pollution to the environment when carrying out tail gas reutilization, the concentration of aqueous ammonia can obtain effectual control in addition, is more convenient for carry on subsequent application. This application is through carrying out chemical reaction earlier to mist, and the absorption of packing is carried out again, and the treatment effeciency is high and ejection of compact is effectual, and among its each district's circulation, cooling and the filler absorption process, more can realize relatively independent sectional type and handle, the effectual treatment effeciency and the effect that has improved in the unit space.
In the specific working process, after the mixed gas enters the system, hydrogen sulfide and sodium hydroxide in the mixed gas react to generate sodium hydrosulfide, gas which does not participate in the reaction is cooled to normal temperature in a raw material cooler, then enters the bottom of an absorption tower, ammonia water separated by a gas-liquid separator sinks to the bottom of the absorption tower, the ammonia water can be communicated to a lower absorption section and also can be communicated to a middle absorption section, gas which is not absorbed enters a packing layer of the lower absorption section, is mixed with dilute ammonia water flowing from the upper part and absorbed, the ammonia water downwards enters the bottom of the absorption tower, the ammonia water at the bottom of the lower absorption section is pumped into a lower section tower heat exchanger by a circulating pump of the lower absorption section, after temperature reduction, the gas is leached at the upper part of the packing layer of the lower absorption section, the ammonia gas flowing upwards is circularly absorbed, the remaining ammonia gas continuously enters the packing layer of the middle absorption section upwards, is mixed with the dilute ammonia water flowing from the upper part and absorbed, and the ammonia water is downwards stored at the bottom of the middle absorption section, and pumping the circulating pump of the middle absorption section into a heat exchanger of the middle section tower, leaching the upper part of a packing layer of the middle absorption section after cooling, circularly absorbing the ammonia gas going upwards, and flowing into the bottom of the absorption tower of the next layer when the ammonia water exceeds the liquid level of the corresponding overflow pipe. The residual ammonia gas which is not absorbed and the soft water added from the top of the tower are absorbed into dilute ammonia water, the dilute ammonia water downwards enters an upper absorption section, and the spraying absorption is realized through a circulating pump repeatedly; and finally, conveying the ammonia water product with the concentration of 20% in the bottom of the absorption tower from the bottom of the absorption tower to the outside by an ammonia water discharge pump, and conveying the ammonia content in the non-condensable gas at the top of the tower to the next working procedure, wherein the ammonia content is less than or equal to 10 ppm.
While the preferred embodiments for carrying out the utility model have been described in detail, it should be understood that they have been presented by way of example only, and not limitation as to the scope, applicability, or configuration of the utility model in any way. The scope of the utility model is defined by the appended claims and equivalents thereof. Many modifications may be made to the foregoing embodiments by those skilled in the art, which modifications are within the scope of the present invention.
Claims (7)
1. A gas recovery reprocessing apparatus comprising:
the absorption tower comprises a lower absorption section, a middle absorption section and an upper absorption section which are sequentially arranged from bottom to top, wherein a first partition plate and a first overflow pipe are arranged between the middle absorption section and the lower absorption section, and a second partition plate and a second overflow pipe are arranged between the upper absorption section and the middle absorption section;
the packing layers are arranged in the lower absorption section, the middle absorption section and the upper absorption section;
the gas to be treated enters the gas-liquid separator after being cooled by the raw material cooler, a gas outlet of the gas-liquid separator is communicated to the lower part of the packing layer of the lower absorption section, and a liquid outlet of the gas-liquid separator is communicated to the bottom of the lower absorption section or the middle absorption section;
the circulating pumping units are correspondingly arranged on the lower absorption section, the middle absorption section and the upper absorption section and comprise circulating pumps and heat exchangers, a water inlet of each circulating pump is communicated with the bottom of the corresponding absorption section, and a water outlet of each circulating pump is communicated to the upper parts of the packing layers of the corresponding absorption sections through the heat exchangers;
the spray water unit is communicated with the top of the absorption tower;
the liquid outlet is arranged at the bottom of the absorption tower, and a liquid outlet pump is communicated with the liquid outlet through a liquid outlet pipeline; and
an exhaust duct disposed at a top of the absorption tower.
2. The gas recovery and reprocessing apparatus according to claim 1, wherein the gas inlet unit further comprises a reaction tank, and after the gas to be processed passes through the reaction tank, the unreacted gas is communicated with the gas inlet of the raw material cooler.
3. The gas recovery and reprocessing apparatus of claim 1 further comprising a cryogen circulation unit comprising a circulating cryogen inlet pipe and a circulating cryogen outlet pipe, the cryogen inlets of the feed cooler and heat exchanger each being connected to the circulating cryogen inlet pipe, and the cryogen outlets of the feed cooler and heat exchanger each being connected to the circulating cryogen outlet pipe.
4. The gas recovery and reprocessing apparatus of claim 1 wherein the side walls of said lower, middle and upper absorption sections are each provided with a level detection sensor.
5. The gas recovery and reprocessing apparatus according to claim 1, wherein said spray water unit comprises a water delivery pipe, a soft water cooler and an intermediate tank, and a water outlet end of said intermediate tank is communicated to a top of the absorption tower.
6. The gas recovery and reprocessing apparatus of claim 1 wherein a packing layer is provided in the absorber between the water outlet of the spray water unit and the water outlet of the circulation pump in the upper absorption section.
7. The gas recovery and reprocessing apparatus according to claim 1, wherein a shower pipe is connected to each of the water outlet of the shower water unit and the water outlet of each of the circulation pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121763543.0U CN215585960U (en) | 2021-07-30 | 2021-07-30 | Gas recovery and reprocessing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121763543.0U CN215585960U (en) | 2021-07-30 | 2021-07-30 | Gas recovery and reprocessing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215585960U true CN215585960U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121763543.0U Active CN215585960U (en) | 2021-07-30 | 2021-07-30 | Gas recovery and reprocessing device |
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| CN (1) | CN215585960U (en) |
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2021
- 2021-07-30 CN CN202121763543.0U patent/CN215585960U/en active Active
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