Tail gas treatment device for molecular sieve filtering process

Abstract

The utility model belongs to the technical field of waste gas treatment, and relates to a tail gas treatment device for a molecular sieve filtering process, which comprises a plant, a belt filter arranged in the plant, a shed cover matched with the belt filter arranged in the plant, a gas collecting pipe arranged at the top of the shed cover and penetrating through the plant, and a first-stage absorption tower connected with the gas collecting pipe through a first induced draft fan, the first-stage absorption tower is provided with a spraying assembly and a first-stage circulating pump matched with the spraying assembly, and a check curtain for shielding the belt filter is arranged on the periphery of the shed cover. The device is simple in structure, the problem of amine-containing tail gas in the filtering process can be effectively solved, the problem of discharging the amine-containing tail gas in a plant is effectively solved, meanwhile, the influence of the tail gas on the health of production operators is avoided, the amine-containing tail gas is introduced into the crystallization tail gas odor treatment system through the induced draft fan, and the production efficiency is improved. The purposes of saving energy, reducing consumption, reducing cost, improving efficiency and reducing emission of waste gas can be achieved, and pollution of smoke dust, nitric oxide and the like to the environment is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste gas treatment and relates to a tail gas treatment device for a molecular sieve filtration process. Background Art

[0002] The basic process of molecular sieve production is to mix silica gel and sodium aluminate solution, add template, and generate molecular sieve by hydrothermal synthesis under certain conditions. Then, a series of operation processes such as filtration and washing, activation and modification, drying and roasting are carried out to produce qualified molecular sieve products.

[0003] At present, the filtration process is divided into one and two stages. The first stage is washing with chemical water, and the second stage is washing with dilute sulfuric acid and chemical water. Since the molecular sieve series currently produced need to add templates for industrial production, when the molecular sieve slurry is spread on the belt filter through the transfer pump for water washing and filtration, the flushing of chemical water will cause the molecular sieve slurry to emit the amine smell of the template and choke the nose; when the second stage is washed with dilute sulfuric acid and chemical water, ion exchange will also occur due to the flushing, and the amine smell of the template will be emitted. This will also have a certain impact on the health of production operators.

[0004] The existing Chinese invention patent with publication number CN114887462A is an ammonia tail gas treatment device and treatment method, including an induced draft fan, a reactor, a first-level packed absorption tower, a first-level packed tower condenser, and a first-level circulation pump. The induced draft fan is connected to the reactor, and the top of the reactor is connected to the bottom of the first-level packed absorption tower; the top of the first-level packed absorption tower is connected to the tail gas packed absorption tower, the bottom of the tail gas packed absorption tower is connected to the tail gas circulation pump via a buffer tank, the tail gas circulation pump is connected to the upper part of the tail gas packed absorption tower to form a circulation, and the top of the tail gas packed absorption tower is connected to the induced draft fan. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a tail gas treatment device for a molecular sieve filtration process.

[0006] The exhaust gas treatment device of the molecular sieve filtration process described in the utility model comprises a factory building, in which a belt filter is arranged, a shed cover adapted to the belt filter is arranged in the factory building, a gas collecting pipe penetrating the factory building is arranged on the top of the shed cover, the gas collecting pipe is connected to a primary absorption tower through a first induced draft fan, the primary absorption tower is provided with a spray assembly and a primary circulation pump adapted thereto, and curtains for shielding the belt filter are arranged around the shed cover.

[0007] Working process or working principle:

[0008] During operation, the hood on the first and second cross-belt filters introduces the amine-containing waste gas from the gas collecting pipe into the primary absorption tower through the first induced draft fan, and the organic amines in the waste gas are sprayed and absorbed by the spray liquid.

[0009] The shed cover is fixed inside the factory building through a supporting frame.

[0010] The plant is provided with an exhaust pipe connected to the air collecting pipe. Since some exhaust gas will overflow from the plant, in order to avoid excessive artificial inhalation and prevent direct discharge into the air, the air in the plant is also sucked into the primary absorption tower through the exhaust pipe through the first induced draft fan for purification.

[0011] The primary absorption tower is connected to the secondary absorption tower through a pipeline. The secondary absorption tower is provided with a spray assembly and a secondary circulation pump adapted thereto. The secondary absorption tower is connected to a second induced draft fan. The harmful substances in the tail gas are effectively absorbed through the two-stage absorption towers, and then the qualified tail gas is discharged through the second induced draft fan.

[0012] The barrier curtains include side barrier curtains on the left and right sides and entry and exit barrier curtains at the front and rear ends. The side barrier curtains and entry and exit barrier curtains are both formed by splicing a number of independent curtains. By splicing a number of curtains, the barrier curtains can be opened at any position to check the internal working conditions.

[0013] The bottom of the side curtain exceeds the upper surface of the belt filter, and the bottom of the inlet and outlet curtain is located 5-10 cm above the upper surface of the belt filter. The bottom of the inlet and outlet curtain is higher than the belt filter to avoid blocking the movement of the conveyed object.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model has a simple structure and can effectively solve the problem of amine-containing tail gas in the filtration process, effectively deal with the problem of amine-containing tail gas emission in the factory, and also avoid the impact on the health of production operators caused by tail gas. The amine-containing waste gas is introduced into the crystallization tail gas odor treatment system through the induced draft fan, which can achieve the purpose of energy saving and consumption reduction, cost reduction and efficiency improvement, and waste gas emission reduction, and reduce the pollution of smoke, nitrogen oxides, etc. to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0017] Figure 2 It is a schematic structural diagram of an upper shed cover of a filter device in one embodiment of the utility model.

[0018] In the figure: 1. canopy; 2. factory building; 3. air collecting pipe; 4. air outlet pipe; 5. first induced draft fan; 6. primary absorption tower; 7. secondary absorption tower; 8. second induced draft fan; 9. secondary circulation pump; 10. primary circulation pump; 11. support frame; 12. side curtain; 13. inlet and outlet curtain; 14. belt filter. DETAILED DESCRIPTION

[0019] Example 1

[0020] like Figure 1-2 As shown, the exhaust gas treatment device of the molecular sieve filtration process described in the utility model comprises a plant 2, in which a belt filter 14 is arranged, in which a shed 1 adapted to the belt filter 14 is arranged, on the top of the shed 1 an air collecting pipe 3 penetrating the plant 2 is arranged, the air collecting pipe 3 is connected to a primary absorption tower 6 via a first induced draft fan 5, the primary absorption tower 6 is provided with a spray assembly and a primary circulation pump 10 adapted thereto, and curtains for shielding the belt filter 14 are arranged around the shed 1; the shed 1 is fixed to the inside of the plant 2 via a support frame 11; an exhaust pipe 4 connected to the exhaust pipe 3 is arranged on the plant 2, and since part of the exhaust gas will overflow from the plant 2, in order to avoid excessive artificial inhalation and prevent direct discharge into the air, the air in the plant 2 is also sucked into the primary absorption tower 6 via the first induced draft fan 5 via the exhaust pipe 4. Purification; the first-level absorption tower 6 is connected to the second-level absorption tower 7 through a pipeline, the second-level absorption tower 7 is provided with a spray assembly and a second-level circulation pump 9 adapted thereto, the second-level absorption tower 7 is connected to the second induced draft fan 8, and the harmful substances in the exhaust gas are effectively absorbed by the two-stage absorption towers, and then the qualified exhaust gas is discharged through the second induced draft fan 8; the curtains include side curtains 12 on the left and right sides and inlet and outlet curtains 13 at the front and rear ends, the side curtains 12 and the inlet and outlet curtains 13 are both formed by splicing a number of independent curtains, and the curtains can be opened at any position to view the internal working conditions through the splicing of a number of curtains; the bottom of the side curtain 12 exceeds the upper surface of the belt filter 14, the bottom of the inlet and outlet curtain 13 is located 5-10 cm above the upper surface of the belt filter 14, and the bottom of the inlet and outlet curtain 13 is higher than the belt filter 14 to avoid blocking the movement of the conveyed material.

[0021] Working process or working principle:

[0022] During operation, the hood 1 on the first and second cross-belt filters 14 introduces the amine-containing waste gas from the gas collecting pipe 3 to the primary absorption tower 6 through the first induced draft fan 5, and the organic amines in the waste gas are sprayed and absorbed by the spray liquid. The gas after spraying and absorption in the primary absorption tower 6 enters the secondary absorption tower 7 to be sprayed and absorbed again, and the exhaust gas purified twice is discharged through the second induced draft fan 8.

[0023] The utility model has a simple structure and can effectively solve the problem of amine-containing tail gas in the filtration process, effectively deal with the emission problem of amine-containing tail gas in the factory 2, and also avoid the impact on the health of production operators caused by tail gas. The amine-containing waste gas is introduced into the crystallization tail gas odor treatment system through the induced draft fan, which can achieve the purpose of energy saving and consumption reduction, cost reduction and efficiency improvement, and waste gas emission reduction, and reduce the pollution of smoke, nitrogen oxides, etc. to the environment.

[0024] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A tail gas treatment device for a molecular sieve filtration process, comprising a plant (2), wherein a belt filter (14) is provided in the plant (2), characterized in that: The factory building (2) is provided with a canopy (1) adapted to the belt filter (14); a gas collecting pipe (3) penetrating the factory building (2) is provided on the top of the canopy (1); the gas collecting pipe (3) is connected to a primary absorption tower (6) via a first induced draft fan (5); the primary absorption tower (6) is provided with a spray assembly and a primary circulation pump (10) adapted thereto; curtains are provided around the canopy (1) to shield the belt filter (14).

2. The tail gas treatment device of the molecular sieve filtration process according to claim 1, characterized in that: The canopy cover (1) is fixed inside the factory building (2) via a support frame (11).

3. The tail gas treatment device of the molecular sieve filtration process according to claim 2, characterized in that: The factory building (2) is provided with an air outlet pipe (4) which is connected to the air collecting pipe (3).

4. The tail gas treatment device of the molecular sieve filtration process according to claim 3, characterized in that: The primary absorption tower (6) is connected to a secondary absorption tower (7) via a pipeline. The secondary absorption tower (7) is provided with a spray assembly and a secondary circulation pump (9) adapted thereto. The secondary absorption tower (7) is connected to a second induced draft fan (8).

5. The tail gas treatment device of the molecular sieve filtration process according to any one of claims 1 to 4, characterized in that: The barrier curtains include side barrier curtains (12) on the left and right sides and entry and exit barrier curtains (13) at the front and rear ends. Both the side barrier curtains (12) and the entry and exit barrier curtains (13) are formed by splicing a number of independent curtains.

6. The tail gas treatment device of the molecular sieve filtration process according to claim 5, characterized in that: The bottom of the side curtain (12) exceeds the upper surface of the belt filter (14), and the bottom of the inlet and outlet curtain (13) is located 5-10 cm above the upper surface of the belt filter (14).

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