CN216457934U - Multistage absorption improvement device of HCL tail gas in chemical production - Google Patents
Multistage absorption improvement device of HCL tail gas in chemical production Download PDFInfo
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- CN216457934U CN216457934U CN202123295690.2U CN202123295690U CN216457934U CN 216457934 U CN216457934 U CN 216457934U CN 202123295690 U CN202123295690 U CN 202123295690U CN 216457934 U CN216457934 U CN 216457934U
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Abstract
The utility model discloses a multistage absorption improvement device of HCL tail gas among chemical production, fall membrane ware, second grade and fall membrane ware and dilute acid and fall the membrane ware by oneself including synthesis jar, raw materials gas pipe, one-level, the raw materials gas pipe sets up on the outer wall of synthesis jar, the one-level falls the membrane ware and sets up the one side at the synthesis jar, just the one-level falls the membrane ware and passes through air duct and synthesis jar intercommunication, the second grade falls the membrane ware and sets up the one side that falls the membrane ware at the one-level, just the second grade falls the membrane ware and passes through one-level gas-supply pipe and one-level falling membrane ware intercommunication, the dilute acid falls the one side that the membrane ware set up at the second grade falls the membrane ware by oneself, just the dilute acid falls the membrane ware by oneself and passes through second grade gas-supply pipe and second grade falling membrane ware intercommunication. The utility model discloses not only the heat transfer is effectual, has prolonged the absorption flow, improves absorption efficiency and stable acid concentration, guarantees sour quality, can in time make the regulation according to product concentration, and the reaction is more sensitive, and the absorption effect is thorough moreover, and is more secure.
Description
Technical Field
The utility model relates to a HCL tail gas treatment technical field specifically is a multistage absorption improvement device of HCL tail gas in chemical production.
Background
In the chemical industry of China, the difficulty of how to treat tail gas of HCL is faced no matter HC I is prepared by a combustion synthesis method of organic chemical engineering or by-product HC I in the intermediate production process of the organic chemical engineering, and according to the corrosion characteristic of HCL gas, the following characteristics exist in the actual production: the gas has high corrosivity to carbon steel equipment, so that the service life of the equipment is short, and the production cost of enterprises is increased; the traditional process has poor absorption effect twice, large fluctuation range of product concentration and substandard quality; HCL tail gas emission does not reach the standard and does not meet the national environmental protection requirement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multistage absorption improvement device of HCL tail gas among chemical production to propose the device and receive the corruption easily in solving above-mentioned background art, life is short, and the absorption effect is poor, the substandard problem of HCL exhaust emissions.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a multistage absorption improvement device of HCL tail gas in chemical production, falls membrane ware, second grade and falls membrane ware and dilute acid and fall the membrane ware by oneself including synthesis jar, raw materials gas pipe, one-level, the raw materials gas pipe sets up on the outer wall of synthesis jar, the one-level falls the membrane ware and sets up the one side at the synthesis jar, just the one-level falls the membrane ware and passes through air duct and synthesis jar intercommunication, the second grade falls one side that the membrane ware set up at the one-level and falls the membrane ware, just the second grade falls the membrane ware and passes through one-level gas-supply pipe and one-level falling membrane ware intercommunication, the dilute acid falls one side that the membrane ware set up at the second grade and falls the membrane ware by oneself, just the dilute acid falls the membrane ware by oneself and passes through second grade gas-supply pipe and second grade falling membrane ware intercommunication.
Preferably, the graphite tubes are arranged in the first-stage film falling device and the second-stage film falling device, so that the heat exchange effect is good, and the absorption temperature is effectively guaranteed.
Preferably, circulating acid pipes are arranged among the first-stage membrane lowering device, the second-stage membrane lowering device and the dilute acid self-membrane lowering device, and circulating water enters from the lower part to the higher part and can be fully contacted with HCL gas.
Preferably, one side of the dilute acid self-falling film device is provided with a filler alkali liquor tower, and the filler alkali liquor tower is communicated with the dilute acid self-falling film device through a tail gas treatment pipe, so that further spraying treatment is performed on the HCL gas.
Preferably, the top that the membrane ware is fallen by oneself to diluted acid is installed the feed liquor pipe, just the internally mounted of feed liquor pipe has the flowmeter, can in time make the regulation according to product concentration.
Preferably, first shower and second shower are installed respectively to the inside of packing alkali lye tower, just equidistant shower nozzle is all installed to the bottom of first shower and second shower, and it advances the pipe to install alkali lye on the outer wall of packing alkali lye tower, and alkali lye advances to manage and all feeds through with first shower and second shower, is convenient for spout alkali lye, and the absorption effect is thoroughly more secure.
Preferably, the delivery pipe is installed on the top of filler alkali lye tower, just install the alkali lye exit tube on the outer wall of filler alkali lye tower bottom, be convenient for discharge gas and alkali lye to the outside.
Preferably, install the filler pipe on the outer wall of feed liquor pipe one side, just the internally mounted of filler pipe has the check valve, is convenient for adjust the watered position of pure water.
Compared with the prior art, the beneficial effects of the utility model are that: the multistage HCL tail gas absorption improving device in chemical production has the advantages that the heat exchange effect is good, the absorption process is prolonged, the absorption efficiency is improved, the acid concentration is stabilized, the acid quality is ensured, the multistage HCL tail gas absorption improving device can be adjusted in time according to the product concentration, the reaction is more sensitive, the absorption effect is thorough, and the improvement is more ensured;
(1) through the arrangement of the first-stage membrane lowering device, the first-stage gas pipe, the second-stage membrane lowering device, the second-stage gas pipe, the graphite pipe, the dilute acid self-membrane lowering device and the circulating acid pipe, HCL gas enters the first-stage membrane lowering device through the gas guide pipe and contacts and absorbs acid circulating liquid flowing down from the circulating acid pipe at the upper part, residual HCL gas which is not completely absorbed further flows to the second-stage membrane lowering device through the first-stage gas pipe and reacts and absorbs the circulating liquid, and a very small amount of HCL gas continues to flow to the dilute acid self-membrane lowering device through the second-stage gas pipe and contacts and absorbs the dilute acid absorbing liquid added with pure water again, because the first-stage membrane lowering device and the second-stage membrane lowering device both adopt a graphite pipe array structure, the circulating water is lowered in height, the equipment has good heat exchange effect under the corrosion-resistant condition, the absorption temperature is effectively ensured, and all the acid falling membrane absorbing equipment adopts high-low serial connection, so that the absorption flow is prolonged, the absorption efficiency is improved, the acid concentration is stabilized, and the acid quality is ensured;
(2) by arranging the liquid inlet pipe, the flowmeter, the water adding pipe and the check valve, the flowmeter is arranged at the bottom of the liquid inlet pipe, the water adding pipe is arranged on one side of the liquid inlet pipe, the check valve is arranged in the water adding pipe, the position of a pure water adding port is changed, the circulating liquid flowmeter is additionally arranged, adjustment can be timely carried out according to the concentration of a product, and the reaction is more sensitive;
(3) through being provided with filler alkali lye tower, first shower, the second shower, alkali lye advances the pipe, the shower nozzle, because the end of handling at gas is provided with filler alkali lye tower, dilute acid falls the inside gas of membrane ware by oneself and enters into filler alkali lye tower through tail gas treatment pipe, alkali lye advances to manage through alkali lye and enters into first shower and second shower, and spray out through the shower nozzle, alkali lye and terminal tail gas contact absorption against the current once more, thoroughly guarantee that tail gas is qualified, improvement filler formula alkali lye absorption tower is independent absorbing device, do not receive external system influence, the absorption effect is thoroughly more secure.
Drawings
Fig. 1 is a schematic front view of the present invention;
fig. 2 is an enlarged schematic structural view of a point a in fig. 1 according to the present invention;
fig. 3 is a schematic view of a cross-sectional enlarged structure of a one-stage falling film machine according to the present invention;
FIG. 4 is a schematic view of the cross-sectional enlarged structure of the packed alkali liquid tower of the present invention;
fig. 5 is a schematic view of the first spraying pipe of the present invention in a bottom view.
In the figure: 1. a synthesis tank; 2. a raw material gas pipe; 3. an air duct; 4. a first-stage membrane lowering device; 5. a primary gas delivery pipe; 6. a secondary membrane falling device; 7. a secondary gas pipe; 8. a circulating acid pipe; 9. a dilute acid self-falling membrane device; 10. a packed lye tower; 11. a tail gas treatment pipe; 12. a liquid inlet pipe; 13. a flow meter; 14. a water feeding pipe; 15. a check valve; 16. a graphite tube; 17. a first shower pipe; 18. a second shower pipe; 19. a discharge pipe; 20. feeding alkali liquor into the pipe; 21. an alkali liquor outlet pipe; 22. and (4) a spray head.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention.
Referring to fig. 1-5, the present invention provides an embodiment: a multistage absorption improvement device for HCL tail gas in chemical production comprises a synthesis tank 1, a raw gas pipe 2, a first-stage membrane lowering device 4, a second-stage membrane lowering device 6 and a dilute acid self-membrane lowering device 9, wherein the raw gas pipe 2 is arranged on the outer wall of the synthesis tank 1;
the primary membrane lowering device 4 is arranged on one side of the synthesis tank 1, and the primary membrane lowering device 4 is communicated with the synthesis tank 1 through the gas guide pipe 3;
the secondary membrane lowering device 6 is arranged on one side of the primary membrane lowering device 4, and the secondary membrane lowering device 6 is communicated with the primary membrane lowering device 4 through a primary gas conveying pipe 5;
the graphite pipes 16 are arranged in the primary film falling device 4 and the secondary film falling device 6, so that the heat exchange effect is good, and the absorption temperature is effectively ensured;
circulating acid pipes 8 are arranged among the first-stage membrane falling device 4, the second-stage membrane falling device 6 and the dilute acid self-falling device 9, and circulating water is in low-in high-out state and can be in full contact with HCL gas;
the dilute acid self-falling film device 9 is arranged on one side of the secondary film falling device 6, and the dilute acid self-falling film device 9 is communicated with the secondary film falling device 6 through a secondary gas conveying pipe 7;
a filler alkali liquor tower 10 is arranged on one side of the dilute acid self-falling film device 9, and the filler alkali liquor tower 10 is communicated with the dilute acid self-falling film device 9 through a tail gas treatment pipe 11, so that further spraying treatment can be conveniently carried out on the HCL gas;
a first spray pipe 17 and a second spray pipe 18 are respectively arranged inside the packed alkali liquid tower 10, spray heads 22 with equal intervals are arranged at the bottom ends of the first spray pipe 17 and the second spray pipe 18, an alkali liquid inlet pipe 20 is arranged on the outer wall of the packed alkali liquid tower 10, and the alkali liquid inlet pipe 20 is communicated with the first spray pipe 17 and the second spray pipe 18, so that alkali liquid can be conveniently sprayed out, and the absorption effect is thoroughly and more guaranteed;
the top end of the packed alkali liquor tower 10 is provided with a discharge pipe 19, and the outer wall of the bottom of the packed alkali liquor tower 10 is provided with an alkali liquor outlet pipe 21, so that gas and alkali liquor can be conveniently discharged to the outside;
a liquid inlet pipe 12 is arranged at the top end of the dilute acid self-falling film device 9, and a flowmeter 13 is arranged inside the liquid inlet pipe 12 and can be adjusted in time according to the product concentration;
the outer wall of one side of the liquid inlet pipe 12 is provided with a water adding pipe 14, and the inside of the water adding pipe 14 is provided with a check valve 15, so that the position of adding water into the pure water can be conveniently adjusted.
When the embodiment of the application is used: firstly, raw material gas is introduced into a synthesis tank 1 through a raw material gas pipe 2, high-temperature HCL gas is formed through combustion synthesis, then the HCL gas enters a primary membrane lowering device 4 through a gas guide pipe 3 and contacts and absorbs acid circulating liquid flowing down from the upper part through a circulating acid pipe 8, the rest HCL gas which is not completely absorbed further flows to a secondary membrane lowering device 6 through a primary gas transmission pipe 5 and reacts and absorbs with the circulating liquid, a very small amount of HCL gas continuously flows to a dilute acid self-membrane lowering device 9 through a secondary gas transmission pipe 7 and contacts and absorbs with dilute acid absorbing liquid added with pure water again, as the primary membrane lowering device 4 and the secondary membrane lowering device 6 both adopt a graphite pipe 16-row-pipe structure, circulating water is low in height, the equipment has good heat exchange effect under the condition of corrosion resistance, the absorption temperature is effectively ensured, and all acid falling membrane absorption equipment are sequentially connected in series at high and low levels, the absorption flow is prolonged, the absorption efficiency is improved, the acid concentration is stabilized, the acid quality is ensured, then, because the bottom of the liquid inlet pipe 12 is provided with the flowmeter 13, meanwhile, one side of the liquid inlet pipe 12 is provided with the water adding pipe 14, the inside of the water adding pipe 14 is provided with the check valve 15, the position of a pure water adding port is changed, the circulating liquid flowmeter 13 is added, the adjustment can be timely made according to the product concentration, the reaction is more sensitive, in addition, because the tail end of the gas treatment is provided with the filler alkali liquor tower 10, the gas in the dilute acid self-falling film device 9 enters the filler alkali liquor tower 10 through the tail gas treatment pipe 11, the alkali liquor enters the first spraying pipe 17 and the second spraying pipe 18 through the alkali liquor inlet pipe 20 and is sprayed out through the spray head 22, the alkali liquor and the tail gas at the tail end are contacted and absorbed in a counter current again, the tail gas is thoroughly ensured to be qualified, the filler type alkali liquor absorption tower is improved to be an independent absorption device and is not influenced by an external system, the absorption effect is thoroughly ensured, the treated gas is discharged through the discharge pipe 19, the alkali liquor is discharged through the alkali liquor outlet pipe 21, and the work of the multistage HCL tail gas absorption improvement device in the chemical production is completed.
Claims (8)
1. A multistage HCL tail gas absorption improvement device in chemical production is characterized by comprising a synthesis tank (1), a raw gas pipe (2), a first-stage membrane lowering device (4), a second-stage membrane lowering device (6) and a dilute acid self-membrane lowering device (9), the raw material gas pipe (2) is arranged on the outer wall of the synthesis tank (1), the primary membrane falling device (4) is arranged on one side of the synthesis tank (1), and the first-stage membrane falling device (4) is communicated with the synthesis tank (1) through an air duct (3), the secondary membrane falling device (6) is arranged on one side of the primary membrane falling device (4), and the secondary membrane lowering device (6) is communicated with the primary membrane lowering device (4) through a primary gas conveying pipe (5), the dilute acid self-falling film device (9) is arranged at one side of the secondary film falling device (6), and the dilute acid automatic membrane falling device (9) is communicated with the secondary membrane falling device (6) through a secondary gas conveying pipe (7).
2. The multistage absorption improvement device of HCL tail gas in chemical production of claim 1, characterized in that: the first-stage film falling device (4) and the second-stage film falling device (6) are both internally provided with graphite tubes (16).
3. The multistage absorption improvement device of HCL tail gas in chemical production of claim 1, characterized in that: circulating acid pipes (8) are arranged among the first-stage membrane falling device (4), the second-stage membrane falling device (6) and the dilute acid self-falling membrane device (9).
4. The multistage absorption improvement device of HCL tail gas in chemical production of claim 1, characterized in that: one side of the dilute acid self-falling film device (9) is provided with a filler alkali liquor tower (10), and the filler alkali liquor tower (10) is communicated with the dilute acid self-falling film device (9) through a tail gas treatment pipe (11).
5. The multistage absorption improvement device of HCL tail gas in chemical production of claim 1, characterized in that: the top of the dilute acid self-falling membrane device (9) is provided with a liquid inlet pipe (12), and the inside of the liquid inlet pipe (12) is provided with a flowmeter (13).
6. The multistage absorption improvement device of HCL tail gas in chemical production of claim 4, characterized in that: first shower (17) and second shower (18) are installed respectively to the inside of packing alkali lye tower (10), just equidistant shower nozzle (22) are all installed to the bottom of first shower (17) and second shower (18), and it advances pipe (20) to install alkali lye on the outer wall of packing alkali lye tower (10), and alkali lye advances pipe (20) and all communicates with first shower (17) and second shower (18).
7. The multistage absorption improvement device of HCL tail gas in chemical production of claim 4, characterized in that: the top of packing alkali lye tower (10) is installed the delivery pipe (19), just install alkali lye exit tube (21) on the outer wall of packing alkali lye tower (10) bottom.
8. The multistage absorption improvement device of HCL tail gas in chemical production of claim 5, characterized in that: install filler pipe (14) on the outer wall of feed liquor pipe (12) one side, just the internally mounted of filler pipe (14) has check valve (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123295690.2U CN216457934U (en) | 2021-12-24 | 2021-12-24 | Multistage absorption improvement device of HCL tail gas in chemical production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123295690.2U CN216457934U (en) | 2021-12-24 | 2021-12-24 | Multistage absorption improvement device of HCL tail gas in chemical production |
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| Publication Number | Publication Date |
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| CN216457934U true CN216457934U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123295690.2U Active CN216457934U (en) | 2021-12-24 | 2021-12-24 | Multistage absorption improvement device of HCL tail gas in chemical production |
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