Absorption tower for chemical tail gas treatment

Abstract

The utility model discloses an absorption tower for chemical tail gas treatment, which belongs to the technical field of waste gas treatment and comprises a tower body, the bottom of the tower body is fixedly connected with a tail gas inlet pipe, a water pipe network is fixed on the inner wall of the tower body, a plurality of spray heads are fixedly connected on the water pipe network, a filler layer is arranged above the water pipe network, and the spray heads are fixedly connected on the filler layer. The outer side of the filler layer is fixedly connected with the inner wall of the tower body, the bottom of the tower body is fixedly connected with a waste liquid collecting pool, the bottom of the waste liquid collecting pool is provided with an aeration device, and the aeration device is fixedly communicated with the tail gas inlet pipe. Dust in waste gas can be preliminarily cleaned through microporous aeration, finally, organic pollutants in the waste gas are further filtered, adsorbed and catalytically oxidized through the multiple filler layers, and the device is low in purification cost, high in purification efficiency and good in effect.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a chemical tail gas treatment absorption tower. Background Art

[0002] Chemical tail gas treatment absorption tower is a device specially designed to treat harmful components in tail gas generated during chemical production. It removes pollutants from the gas phase through physical or chemical means to achieve the purpose of tail gas purification.

[0003] The operating principle of an exhaust gas absorber typically involves three steps: absorption, adsorption, and reaction. Exhaust gas first enters the absorber, where pollutants are adsorbed onto the absorbent's surface. Subsequently, the pollutants in the adsorbent react chemically with the absorbent, transforming them into harmless substances. This method effectively removes pollutants from industrial exhaust or converts them into harmless substances.

[0004] The exhaust gas absorption tower is filled with an absorption liquid. When the exhaust gas passes through the absorption tower, the harmful substances in it will be absorbed by the solvent in the absorption liquid (such as water) and may be converted into components in the aqueous solution through chemical reactions. In this process, the harmful substances can be transferred from the gas phase to the liquid phase through physical absorption or chemical absorption (chemical reaction with the solvent).

[0005] In the existing chemical tail gas treatment, the single method of filtration and adsorption has poor effect, low efficiency and high treatment cost. Therefore, an adsorption tower that combines multiple methods to improve the treatment efficiency and treatment effect of chemical tail gas is needed. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a chemical tail gas treatment absorption tower.

[0007] The technical solution of the utility model is: a chemical tail gas treatment absorption tower, comprising a tower body, the bottom of the tower body is fixedly connected to a tail gas inlet pipe, the inner wall of the tower body is fixedly provided with a water pipe network, a plurality of nozzles are fixedly connected to the water pipe network, a packing layer is provided above the water pipe network, the outer side of the packing layer is fixedly connected to the inner wall of the tower body, the bottom of the tower body is fixedly connected to a waste liquid collection pool, the bottom of the waste liquid collection pool is provided with an aeration device, and the aeration device is fixedly connected to the tail gas inlet pipe.

[0008] Furthermore, the aeration device includes a main pipe, a plurality of auxiliary pipes are fixedly connected on both sides of the main pipe, a plurality of branch pipes are fixedly connected on both sides of the auxiliary pipe, and aeration holes are provided on the upper surfaces of the main pipe, auxiliary pipes and branch pipes.

[0009] Description: The incoming gas is evenly dispersed at the bottom of the waste liquid collection tank through the main pipe, auxiliary pipe and branch pipe in the aeration device.

[0010] Furthermore, the packing layer includes a plurality of fixed grids for fixedly connecting to the outer wall of the tower body, and packing particles are laid on top of the fixed grids.

[0011] Description: The purpose of purifying tail gas is achieved by multi-layer adsorption filtration through filler particles.

[0012] Furthermore, a liquid pump is fixedly connected to the waste liquid collection pool, a water outlet of the liquid pump is fixedly connected to a filter tube, and the end of the filter tube is connected to a filter.

[0013] Description: Filter and recycle the wastewater in the waste liquid collection pool to improve the efficiency of water use for gas washing and save water resources.

[0014] Furthermore, the filter includes a filter housing, a card slot is provided in the middle of the filter housing, a filter screen is connected in the card slot, a sealing door for replacing the filter screen is provided on the top of the filter housing, a sedimentation tank is provided on the left side of the filter housing, a cleaning door is provided at the bottom of the sedimentation tank, and the right end of the filter housing is connected to the water pipe network through a pipe.

[0015] Note: Replace the filter through the sealed door. The dust blocked by the filter will be deposited in the sedimentation tank in the form of sediment.

[0016] The beneficial effects of the utility model are:

[0017] The utility model uses an alkaline solution to wash chemical waste gas, and microporous aeration can preliminarily clean dust in the waste gas. At the same time, the sulfur dioxide gas in the waste gas reacts with the alkaline solution to remove the sulfur dioxide gas in the waste gas. The alkaline solution sprayed by the water pipe network and the unreacted sulfur dioxide gas continue to react in the tower. Finally, the organic pollutants in the waste gas are further filtered, adsorbed and catalytically oxidized through multiple layers of fillers to adsorb and oxidize and decompose. The purification cost of this device is low, the purification efficiency is high, and the effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0020] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0021] Figure 4It is a schematic diagram of the top structure of the water pipe network of the utility model.

[0022] Figure 5 It is a schematic diagram of the top view of the aeration device of the utility model.

[0023] Among them, 1-tower body, 2-exhaust gas inlet pipe, 3-water pipe network, 4-nozzle, 5-packing layer, 6-waste liquid collection tank, 7-aeration device, 71-main pipeline, 72-auxiliary pipeline, 73-branch pipeline, 74-aeration hole, 51-fixed grid, 52-packing particles, 61-liquid pump, 62-filter tube, 63-filter, 631-filter housing, 632-card slot, 633-filter screen, 634-sealing door, 635-sedimentation tank, 636-cleaning door. DETAILED DESCRIPTION

[0024] Example 1:

[0025] like Figure 1 As shown, a chemical tail gas treatment absorption tower includes a tower body 1, and a tail gas inlet pipe 2 is fixedly connected to the bottom of the tower body 1. Figure 4 As shown, a water pipe network 3 is fixed to the inner wall of the tower body 1, and a plurality of nozzles 4 are fixedly connected to the water pipe network 3. A packing layer 5 is provided above the water pipe network 3, and the outer side of the packing layer 5 is fixedly connected to the inner wall of the tower body 1. A waste liquid collection tank 6 is fixedly connected to the bottom of the tower body 1, and an aeration device 7 is provided at the bottom of the waste liquid collection tank 6. The aeration device 7 is fixedly connected to the exhaust gas inlet pipe 2.

[0026] like Figure 5 As shown, the aeration device 7 includes a main pipe 71, multiple auxiliary pipes 72 are fixedly connected on both sides of the main pipe 71, and multiple branch pipes 73 are fixedly connected on both sides of the auxiliary pipe 72. Aeration holes 74 are provided on the upper surfaces of the main pipe 71, the auxiliary pipes 72 and the branch pipes 73.

[0027] The incoming gas is evenly dispersed at the bottom of the waste liquid collection tank through the main pipe 71, the auxiliary pipe 72 and the branch pipe 73 in the aeration device 7.

[0028] like Figure 3 As shown, the packing layer 5 includes a plurality of fixed grids 51 for fixedly connecting to the outer wall of the tower body 1 , and packing particles 52 are laid on top of the fixed grids 51 .

[0029] The filler particles 52 are used for multi-layer adsorption filtration to achieve the purpose of purifying the tail gas.

[0030] In this embodiment, the solution introduced into the water pipe network is a sodium hydroxide solution with a concentration of 5%, which reacts with sulfur dioxide to generate sodium sulfate and water without generating exhaust gas. The packing layer 5 has four layers. The first layer uses honeycomb zeolite molecular sieve as the packing particles 52, the second layer uses Mg-Cu / Al2O3 catalyst (existing technology) as the packing particles 52, the third layer uses iron-carbon balls as the packing particles 52, and the fourth layer uses activated carbon particles as the packing particles 52.

[0031] Example 2:

[0032] The difference between this embodiment and embodiment 1 is that a liquid pump 61 is fixedly connected to the waste liquid collection pool 6 , the water outlet of the liquid pump 61 is fixedly connected to a filter tube 62 , and the end of the filter tube 62 is connected to a filter 63 .

[0033] The waste water in the waste liquid collection tank 6 is filtered and recycled to improve the use efficiency of the water used for gas washing and save water resources.

[0034] like Figure 2 As shown, the filter 63 includes a filter housing 631, a card slot 632 is provided in the middle of the filter housing 631, a filter screen 633 is carded in the card slot 632, a sealing door 634 for replacing the filter screen 633 is provided on the top of the filter housing 631, a sedimentation tank 635 is provided on the left side of the filter housing 631, a cleaning door 636 is provided at the bottom of the sedimentation tank 635, and the right end of the filter housing 631 is connected to the water pipe network 3 through a pipe.

[0035] The filter 633 is replaced through the sealing door 634 , and the dust blocked by the filter 633 is deposited in the sedimentation tank 635 in the form of sediment.

[0036] Compared with Example 1, Example 2 filters the wastewater in the waste liquid collection tank 6 through the filter 63, filters the sediment in the wastewater through the filter 63, and then re-sprays it through the water pipe network 3 to react with the sulfur dioxide gas in the exhaust gas to neutralize it.

[0037] The working method of the above embodiment 2 comprises the following steps:

[0038] S1. Waste gas enters the aeration device through the tail gas inlet pipe, and sulfur dioxide gas enters the waste liquid collection tank 6 through the aeration holes 7 on the main pipe 71, the auxiliary pipe 72, and the branch pipe 73, reacts with the alkaline solution to generate inorganic salts, and the dust in the waste gas forms suspended matter in the waste liquid collection tank 6.

[0039] S2: The waste liquid is pumped into the filter 63 by the liquid pump 61. After filtering through the filter 633, the sediment in the waste liquid accumulates in the sedimentation tank 635. After filtering through the filter 633, the waste liquid enters the water pipe network 3 and is sprayed into the tower through the nozzle 4. It mixes with the dust in the rising exhaust gas again and then falls into the waste liquid collection tank 6.

[0040] S3. After passing through the water pipe network 3, the waste gas continues to rise and is filtered and adsorbed by the packing layer 5 to remove organic matter in the waste gas and purify the waste gas.

[0041] In the above embodiments, the liquid pump 61 is a commercially available product. As long as it can achieve the functions of the present invention, those skilled in the art can choose to use it according to common knowledge, and no special limitation is made here.

Claims

1. A chemical tail gas treatment absorption tower, characterized in that: The invention comprises a tower body (1), wherein the bottom of the tower body (1) is fixedly connected to an exhaust gas inlet pipe (2), the inner wall of the tower body (1) is fixedly connected to a water pipe network (3), a plurality of nozzles (4) are fixedly connected to the water pipe network (3), a packing layer (5) is provided above the water pipe network (3), the outer side of the packing layer (5) is fixedly connected to the inner wall of the tower body (1), the bottom of the tower body (1) is fixedly connected to a waste liquid collection pool (6), the bottom of the waste liquid collection pool (6) is provided with an aeration device (7), and the aeration device (7) is fixedly connected to the exhaust gas inlet pipe (2).

2. A chemical tail gas treatment absorption tower according to claim 1, characterized in that: The aeration device (7) comprises a main pipe (71), a plurality of auxiliary pipes (72) are fixedly connected to both sides of the main pipe (71), a plurality of branch pipes (73) are fixedly connected to both sides of the auxiliary pipe (72), and aeration holes (74) are provided on the upper surfaces of the main pipe (71), the auxiliary pipes (72), and the branch pipes (73).

3. A chemical tail gas treatment absorption tower according to claim 1, characterized in that: The packing layer (5) comprises a plurality of fixed grids (51) for fixedly connecting to the outer wall of the tower body (1), and packing particles (52) are laid above the fixed grids (51).

4. A chemical tail gas treatment absorption tower according to claim 1, characterized in that: A liquid extraction pump (61) is fixedly connected to the waste liquid collection pool (6), a water outlet of the liquid extraction pump (61) is fixedly connected to a filter tube (62), and the end of the filter tube (62) is connected to a filter (63).

5. A chemical tail gas treatment absorption tower as claimed in claim 4, characterized in that: The filter (63) comprises a filter housing (631), a card slot (632) is provided in the middle of the filter housing (631), a filter screen (633) is carded in the card slot (632), a sealing door (634) for replacing the filter screen (633) is provided on the top of the filter housing (631), a sedimentation tank (635) is provided on the left side of the filter housing (631), a cleaning door (636) is provided at the bottom of the sedimentation tank (635), and the right end of the filter housing (631) is connected to the water pipe network (3) through a pipeline.

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