Anti-blocking system for air inlet pipe of sodium hydrosulfide reactor

Abstract

The utility model relates to the technical field of blockage prevention of air inlet pipes of sodium hydrosulfide reactors, and particularly discloses a blockage prevention system for an air inlet pipe of a sodium hydrosulfide reactor, which comprises a reactor, the top end of the reactor is connected with an air inlet pipe, a discharge pipe at the bottom of the reactor is connected with a gas purging pipeline, and the discharge pipe is connected with a liquid caustic soda back-flushing component; the end, away from the discharging pipe, of the liquid caustic soda back-flushing assembly is connected to the air inlet pipe. Compared with the prior art, due to the arrangement of the liquid caustic soda back-flushing assembly, liquid caustic soda in the reactor can form circulation, a turbulent flow state is formed at the joint of a gas purging pipeline, crystal substances can be flushed away, crystal aggregation of the gas inlet pipe is reduced, the gas inlet pipe is prevented from being blocked, and the reaction contact time of the liquid caustic soda and hydrogen sulfide in acid gas is prolonged; the absorption rate is improved, and the problem that the environment is polluted by black smoke emitted by a torch is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-blocking of the inlet pipe of a sodium hydrosulfide reactor, and specifically discloses an anti-blocking system for the inlet pipe of a sodium hydrosulfide reactor. Background Art

[0002] Acid gas devices generally refer to equipment and systems used to treat or purify acid gas-containing substances. These devices are widely used in multiple industries such as chemical engineering, electroplating, semiconductor, electronics, metallurgy, and pharmaceuticals to treat the acid waste gas generated during the production process.

[0003] The acid gas device is a device for treating acid gas from an acid water stripping device and a solvent regeneration device, and its reactor inlet pipe is very easy to be blocked. Among them, the acid gas in the solvent regeneration device contains more CO2 and NH3 gases, which react with liquid caustic soda to form salts, which is the main reason for blocking the inlet pipe of the sodium hydrosulfide reactor, and at the same time, it will also cause pressure buildup in the front pipeline.

[0004] To deal with the blockage, it is necessary to use steam to blow and dredge, which needs to be done 2 times per shift (about once every 4 hours). However, hydrogen sulfide in the acid gas cannot be completely absorbed, resulting in black smoke from the flare and polluting the environment. Moreover, using steam to blow will lead to unstable operation, and a large amount of steam entering the sodium hydrosulfide reactor will cause a decrease in the concentration of sodium hydrosulfide. Later, it is necessary to use steam to heat and concentrate and remove moisture, which not only causes waste of energy but also prolongs the discharging time. Summary of the Utility Model

[0005] Aiming at the above deficiencies of the prior art, the utility model provides an anti-blocking system for the inlet pipe of a sodium hydrosulfide reactor to solve the problem that hydrogen sulfide in the acid gas cannot be completely absorbed, resulting in black smoke from the flare and polluting the environment.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] An anti-blocking system for the inlet pipe of a sodium hydrosulfide reactor includes a reactor. The top of the reactor is connected to an inlet pipe, and a gas purge pipeline is connected to the bottom discharge pipe of the reactor. A liquid caustic soda backwashing component is connected to the discharge pipe; one end of the liquid caustic soda backwashing component far away from the discharge pipe is connected to the inlet pipe. Through the setting of the liquid caustic soda backwashing component, the liquid caustic soda in the reactor can form a cycle, making the connection of the gas purge pipeline in a turbulent state, which can wash away the crystallized substances, reduce the crystallization aggregation in the inlet pipe, avoid blocking the inlet pipe, and increase the reaction contact time between the liquid caustic soda and hydrogen sulfide in the acid gas, improve the absorption rate, and reduce the problem of black smoke pollution from the flare.

[0008] Preferably, the liquid caustic soda backwashing assembly includes a circulation pipe; one end of the circulation pipe is connected to the discharge pipe, and the other end is connected to the inlet gas pipe; a filtering unit and a circulation pump are sequentially connected to the circulation pipe. The arrangement of the filtering unit on the circulation pipe can filter out crystals, prevent the crystals from damaging the mechanical seal of the circulation pump, extend its service life, and reduce the operation cost.

[0009] Preferably, a nozzle is provided at the connection end of the circulation pipe and the inlet gas pipe. It can increase the contact area between the liquid caustic soda in the circulation pipe and the acidic gas in the inlet gas pipe, and ensure the absorption of the acidic gas.

[0010] Preferably, the filtering unit includes a coarse filter and a fine filter; the drain pipes of the coarse filter and the fine filter are connected to a collection tank. The coarse filter can filter out large particle crystals; the fine filter mainly filters out fine crystals and coke powder, prevents the crystals from damaging the mechanical seal of the circulation pump and wearing the nozzle, extends its service life, and reduces the operation cost.

[0011] Preferably, the collection tank is connected to a recycling pump through a pipeline; the liquid outlet of the recycling pump is connected to the circulation pipe. The collection tank can collect the crystals filtered out by the filtering unit, and the recycling pump can pump the crystals back into the circulation pipe again, increasing the utilization rate of the liquid caustic soda.

[0012] Preferably, a connecting pipe is connected between the collection tank and the inlet gas pipe. It can utilize the negative pressure in the reactor to draw back the materials in the collection tank.

[0013] Preferably, the gas purging pipeline includes a steam purging pipe and a nitrogen purging pipe. Nitrogen purging can avoid increasing the moisture in the reactor, avoid subsequent concentration operations, reduce energy input, and ensure the discharging time.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. Through the arrangement of the liquid caustic soda backwashing assembly, the liquid caustic soda in the reactor can form a circulation, making the connection part of the gas purging pipeline in a turbulent state, which can wash away the crystals, reduce the crystal accumulation in the inlet gas pipe, prevent the inlet gas pipe from being blocked, and increase the reaction contact time between the liquid caustic soda and hydrogen sulfide in the acidic gas, improve the absorption rate, and reduce the problem of environmental pollution caused by black smoke from the flare.

[0016] 2. Nitrogen purging can avoid increasing the moisture in the reactor, avoid subsequent concentration operations, reduce energy input, and ensure the discharging time. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0018] Figure 1 This is a schematic structural diagram of the present utility model.

[0019] Explanation of the reference numerals in the drawings:

[0020] 1 - Reactor, 2 - Discharge pipe, 3 - Inlet gas pipe, 4 - Circulation pipe, 5 - Circulation pump, 6 - Coarse filter, 7 - Fine filter, 8 - Drain pipe, 9 - Collection tank, 10 - Recovery pump, 11 - Nozzle, 12 - Connecting pipe, 13 - Steam purging pipe, 14 - Nitrogen purging pipe, 15 - Connecting valve. Specific embodiments

[0021] In order to enable those skilled in the art of this technology to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0022] As Figure 1 shown, an anti - clogging system for the inlet gas pipe of a sodium hydrosulfide reactor includes a reactor 1. An inlet gas pipe 3 is connected to the top of the reactor 1. A gas purging pipeline is connected to the discharge pipe 2 at the bottom of the reactor 1, and a liquid caustic soda back - flushing assembly is connected to the discharge pipe 2. One end of the liquid caustic soda back - flushing assembly far from the discharge pipe 2 is connected to the inlet gas pipe 3. Through the setting of the liquid caustic soda back - flushing assembly, the liquid caustic soda in the reactor 1 can form a cycle, making the connection of the gas purging pipeline in a turbulent state, which can wash away the crystallized substances, reduce the crystallization accumulation in the inlet gas pipe 3, avoid clogging the inlet gas pipe 3, and increase the reaction contact time between the liquid caustic soda and hydrogen sulfide in the acidic gas, improve the absorption rate, and reduce the problem of environmental pollution caused by black smoke from the flare.

[0023] In the above setting, the liquid caustic soda backwashing assembly includes a circulation pipe 4; one end of the circulation pipe 4 is connected to the discharge pipe 2, and the other end is connected to the intake pipe 3; a filtering unit and a circulation pump 5 are sequentially connected to the circulation pipe 4. A nozzle 11 is provided at the connection end of the circulation pipe 4 and the intake pipe 3. It can increase the contact area between the liquid caustic soda in the circulation pipe 4 and the acidic gas in the intake pipe 3, ensuring the absorption of the acidic gas. The filtering unit includes a coarse filter 6 and a fine filter 7; the drain pipes 8 of the coarse filter 6 and the fine filter 7 are connected to a collection tank 9. The coarse filter 6 can filter out large particle crystallizations; the fine filter 7 mainly filters out fine crystallizations and coke powder, avoiding the damage of the circulation pump 5's mechanical seal and the wear of the nozzle 11, prolonging their service life, and reducing the operation cost. Valves are cooperatively provided on the pipelines among the coarse filter 6, the fine filter 7, and the collection tank 9. Valves are provided on the inlet and outlet pipelines of the coarse filter 6 and the fine filter 7. A pipeline is connected between the liquid inlet pipe and the liquid outlet pipe of the fine filter 7, and a valve is provided on this pipeline. In order to increase the circulation speed of the circulation pipe 4, the fine filter 7 is closed using this pipeline, and only the coarse filter 6 is used for filtering.

[0024] Among them, the collection tank 9 is connected with a recovery pump 10 through a pipeline; the liquid outlet of the recovery pump 10 is connected to the circulation pipe 4, and the connection is arranged on one side of the liquid outlet of the circulation pump 5. The collection tank 9 can collect the crystallizations filtered out by the filtering unit and pump the crystallizations back into the circulation pipe 4 through the recovery pump 10, increasing the utilization rate of the liquid caustic soda. A connecting pipe 12 is connected between the collection tank 9 and the intake pipe 3. It can utilize the negative pressure in the reactor 1 to suck back the materials in the collection tank 9. A valve is provided on the connecting pipe 12. When there is more material in the collection tank 9, part of the material is extracted through the connecting pipe 12 using the negative pressure in the reactor 1, and the remaining material can be pumped back using the recovery pump 10. The gas purging pipeline includes a steam purging pipe 13 and a nitrogen purging pipe 14. Nitrogen purging can avoid increasing the moisture in the reactor 1, avoid subsequent concentration operations, reduce energy input, and ensure the discharging time. Drain pipes are respectively provided on the steam purging pipe 13 and the nitrogen purging pipe 14. A pipeline is connected between the steam purging pipe 13 and the nitrogen purging pipe 14, and a connecting valve 15 is provided on the pipeline. When cleaning the steam purging pipe 13 and the nitrogen purging pipe 14, the valves on the drain pipes are opened, the connection valves of the steam purging pipe 13, the nitrogen purging pipe 14, and the discharge pipe 2 are closed, and the gas purging pipeline is purged and cleaned using the steam purging pipe 13 or the nitrogen purging pipe 14.

[0025] Although the present utility model has been described in detail by referring to the accompanying drawings and in conjunction with the preferred embodiments, the present utility model is not limited thereto. Without departing from the spirit and essence of the present utility model, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present utility model, and these modifications or substitutions should all be within the scope covered by the present utility model. / Any person skilled in the art within the technical scope disclosed by the present utility model can easily conceive of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the said claims.

Claims

1. A sodium hydrosulfide reactor inlet pipe anti-blocking system, comprising a reactor (1), an inlet pipe (3) is connected to the top of the reactor (1), and a gas purge pipeline is connected to the bottom discharge pipe (2) of the reactor (1), characterized in that, A liquid caustic soda backwashing assembly is connected to the discharge pipe (2); one end of the liquid caustic soda backwashing assembly away from the discharge pipe (2) is connected to the intake pipe (3).

2. The sodium hydrosulfide reactor inlet pipe anti-blocking system according to claim 1, characterized in that, The liquid caustic soda backwashing assembly includes a circulation pipe (4); one end of the circulation pipe (4) is connected to the discharge pipe (2), and the other end is connected to the intake pipe (3); a filtering unit and a circulation pump (5) are sequentially connected to the circulation pipe (4).

3. The sodium hydrosulfide reactor inlet pipe anti-blocking system according to claim 2, wherein, A nozzle (11) is arranged at the connection end of the circulation pipe (4) and the intake pipe (3).

4. The sodium hydrosulfide reactor inlet pipe anti-blocking system according to claim 3, characterized in that, The filtering unit includes a coarse filter (6) and a fine filter (7); the sewage discharge pipes (8) of the coarse filter (6) and the fine filter (7) are connected to a collection tank (9).

5. The sodium hydrosulfide reactor inlet pipe anti-clogging system according to claim 4, characterized in that, The collection tank (9) is connected with a recovery pump (10) through a pipeline; the liquid outlet of the recovery pump (10) is connected to the circulation pipe (4).

6. The sodium hydrosulfide reactor inlet pipe anti-blocking system according to claim 5, characterized in that, A communicating pipe (12) is connected between the collection tank (9) and the intake pipe (3).

7. The sodium hydrosulfide reactor inlet pipe anti-blocking system according to claim 1, characterized in that, The gas purging pipeline includes a steam purging pipe (13) and a nitrogen purging pipe (14).

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