Molecular sieve crystallization high-temperature tail gas peculiar smell treatment device

Abstract

The utility model relates to a molecular sieve crystallization high-temperature tail gas peculiar smell treatment device, which belongs to the technical field of environmental protection devices and comprises a primary heat exchanger, a secondary heat exchanger, a water vapor separation tank and a tail gas absorption tower which are sequentially connected in series in a pipeline. The primary heat exchanger and the secondary heat exchanger are connected with the cooling system through pipelines; the primary heat exchanger is connected with a high-temperature amine-containing tail gas collecting pipeline; the top of the tail gas absorption tower is connected with an exhaust pipeline; high-temperature tail gas is condensed from a gas state to a liquid state through the two-stage heat exchanger, then amine-containing sewage is intercepted through the water vapor separation tank, a small amount of residual amine-containing tail gas is absorbed through the tail gas absorption tower, and finally treated clean gas is discharged to the atmosphere; the high-temperature amine-containing tail gas purification device can purify high-temperature amine-containing tail gas discharged during pressure relief sampling, so that environment pollution is avoided, green and low-carbon production is guaranteed, and the tail gas is prevented from affecting physical and psychological health of staff.

Description

Technical Field

[0001] The utility model relates to a molecular sieve crystallization high-temperature tail gas odor treatment device, belonging to the technical field of environmental protection devices. Background Art

[0002] The production process of molecular sieves needs to go through several processes such as crystallization synthesis, exchange filtration, activation modification, drying and calcination, and grinding to finally produce qualified molecular sieve products.

[0003] Crystallization synthesis is one of the important links in the molecular sieve production process, and this process is the basis for synthesizing molecular sieves. Currently, the crystallization synthesis of molecular sieves is carried out in a beating tank through a weighing and metering system, and chemical water, silica gel, low-bias solution, and seed crystals are collected in sequence for stirring. After the collection of materials is completed, the mixed slurry is transferred to the crystallization kettle. The crystallization kettle is sealed and begins to heat up. It is operated according to the process requirements and starts constant temperature crystallization after reaching the temperature. The material in the crystallization kettle is crystallized at constant temperature for a specified time and the crystallization ends. The pressure is released and samples are taken for analysis. If qualified, it is transferred to the crystallization intermediate tank.

[0004] After the crystallization reaction is completed, it is usually necessary to conduct pressure relief sampling and analysis before transferring the material. Since the materials currently used contain a small amount of amines, the amine gas in the kettle will be discharged through the pressure relief valve during pressure relief sampling. At this time, the temperature of the amine-containing tail gas is usually between 180℃ and 190℃. With the increasing intensity of environmental protection inspections, if a large amount of amine-containing tail gas is discharged without treatment, it will pollute the environment, which is not conducive to green and low-carbon production, and will also have an adverse effect on the physical and mental health of employees. Utility Model Content

[0005] In view of the above deficiencies in the existing technology, the technical problem to be solved by the present invention is: to provide a molecular sieve crystallization high-temperature tail gas odor treatment device, which can purify the high-temperature amine-containing tail gas discharged by the pressure relief valve, avoid environmental pollution, and ensure green and low-carbon production.

[0006] The molecular sieve crystallization high-temperature tail gas odor treatment device described in the utility model includes a primary heat exchanger, a secondary heat exchanger, a water vapor separation tank and a tail gas absorption tower. The primary heat exchanger, the secondary heat exchanger, the water vapor separation tank and the tail gas absorption tower are connected in series in a pipeline; the primary heat exchanger and the secondary heat exchanger are connected to the cooling system through a pipeline; the primary heat exchanger is connected to the high-temperature amine-containing tail gas collection pipeline; and the top of the tail gas absorption tower is connected to the external exhaust pipeline.

[0007] The technical solution of the utility model is to provide a molecular sieve crystallization high-temperature exhaust odor treatment device, which condenses the high-temperature exhaust gas from gas to liquid through a two-stage heat exchanger, then intercepts amine-containing wastewater through a water vapor separation tank, and finally absorbs the remaining small amount of amine-containing exhaust gas through a tail gas absorption tower.

[0008] Preferably, the cooling system includes a cooling water storage tank, a chiller and a cooling water pump. The chiller is used to refrigerate and cool the cooling water. The cooling water storage tank is provided with a water supply port A. The cooling water storage tank is used to replenish and temporarily store cooling water, and to mix and cool the heated cooling water. The chiller, cooling water pump and cooling water storage tank are connected in sequence.

[0009] Preferably, the chiller is connected to the water inlet of the primary heat exchanger, the water outlet of the primary heat exchanger is connected to the water inlet of the secondary heat exchanger, and the water outlet of the secondary heat exchanger is connected to the cooling water storage tank.

[0010] Preferably, the water vapor separation tank is connected to a material transfer pump, and the amine-containing wastewater treated in the tank is discharged or reused for production through the material transfer pump.

[0011] Preferably, a circulation pump is provided on one side of the tail gas absorption tower, the inlet of the circulation pump is connected to the water tank at the bottom of the tail gas absorption tower, and the outlet of the circulation pump is connected to the spray pipe inside the tail gas absorption tower; a water supply port B is also provided on the tail gas absorption tower.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The molecular sieve crystallization high-temperature tail gas odor treatment device described in the present invention condenses the high-temperature tail gas from gas to liquid through a two-stage heat exchanger, then intercepts the amine-containing wastewater through a water vapor separation tank, and then absorbs the remaining small amount of amine-containing tail gas through a tail gas absorption tower, and finally discharges the treated clean gas into the atmosphere; the utility model can purify the high-temperature amine-containing tail gas discharged during pressure relief sampling, avoid polluting the environment, ensure green and low-carbon production, and prevent tail gas from affecting the physical and mental health of employees. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] In the figure: 1. High-temperature amine-containing tail gas collection pipeline; 2. Primary heat exchanger; 3. Secondary heat exchanger; 4. Water supply port B; 5. External discharge pipeline; 6. Circulation pump; 7. Tail gas absorption tower; 8. Transfer pump; 9. Water vapor separation tank; 10. Cooling water storage tank; 11. Cooling water pump; 12. Chiller; 13. Water supply port A. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, this embodiment is implemented by the following technical solutions: including a primary heat exchanger 2, a secondary heat exchanger 3, a water vapor separation tank 9 and a tail gas absorption tower 7, the primary heat exchanger 2, the secondary heat exchanger 3, the water vapor separation tank 9 and the tail gas absorption tower 7 are sequentially connected in series in the pipeline; the primary heat exchanger 2 and the secondary heat exchanger 3 are connected to the cooling system through a pipeline; the primary heat exchanger 2 is connected to the high-temperature amine-containing tail gas collection pipeline 1; the top of the tail gas absorption tower 7 is connected to the external exhaust pipe 5.

[0017] In this embodiment, the cooling system includes a cooling water storage tank 10, a chiller 12 and a cooling water pump 11. The chiller 12 is used to cool the cooling water. The cooling water storage tank 10 is provided with a water replenishment port A13. The cooling water storage tank 10 is used to replenish and temporarily store cooling water, and to mix and cool the heated cooling water. The chiller 12, the cooling water pump 11 and the cooling water storage tank 10 are connected in sequence.

[0018] The chiller 12 is connected to the water inlet of the primary heat exchanger 2, the water outlet of the primary heat exchanger 2 is connected to the water inlet of the secondary heat exchanger 3, and the water outlet of the secondary heat exchanger 3 is connected to the cooling water storage tank 10. The water vapor separation tank 9 is connected to the material transfer pump 8, through which the treated amine-containing wastewater in the tank is discharged or reused in production. A circulating pump 6 is provided on one side of the tail gas absorption tower 7. The inlet of the circulating pump 6 is connected to the water tank at the bottom of the tail gas absorption tower 7, and the outlet of the circulating pump 6 is connected to the spray pipe inside the tail gas absorption tower 7. The tail gas absorption tower 7 is also provided with a water supply port B4.

[0019] The working process of this utility model is:

[0020] The high-temperature amine-containing tail gas is transported by the high-temperature amine-containing tail gas collection pipeline 1 and enters the primary heat exchanger 2. In the primary heat exchanger 2, the high-temperature amine-containing tail gas changes from gas to liquid through indirect heat exchange with cooling water; then it enters the secondary heat exchanger 3. In the secondary heat exchanger 3, the temperature of the amine-containing tail gas continues to drop through indirect heat exchange with cooling water; the cooled amine-containing tail gas enters the water vapor separation tank 9 through the pipeline, and the liquid amine-containing wastewater is intercepted by the water vapor separation tank 9. The amine-containing wastewater is discharged to the outside through the transfer pump 8 or reused in production; then the tail gas enters the tail gas absorption tower 7, and the tail gas absorption tower 7 absorbs the remaining small amount of amine-containing tail gas. Finally, the treated clean gas is discharged to the atmosphere through the external discharge pipe 5.

Claims

1. A molecular sieve crystallization high-temperature tail gas odor treatment device, characterized in that: The system comprises a primary heat exchanger (2), a secondary heat exchanger (3), a water vapor separation tank (9) and a tail gas absorption tower (7), wherein the primary heat exchanger (2), the secondary heat exchanger (3), the water vapor separation tank (9) and the tail gas absorption tower (7) are sequentially connected in series in a pipeline; the primary heat exchanger (2) and the secondary heat exchanger (3) are connected to a cooling system via a pipeline; the primary heat exchanger (2) is connected to a high-temperature amine-containing tail gas collection pipeline (1); and the top of the tail gas absorption tower (7) is connected to an external discharge pipeline (5).

2. The molecular sieve crystallization high-temperature tail gas odor treatment device according to claim 1, characterized in that: The cooling system comprises a cooling water storage tank (10), a chiller (12) and a cooling water pump (11); the cooling water storage tank (10) is provided with a water supply port A (13); the chiller (12), the cooling water pump (11) and the cooling water storage tank (10) are connected in sequence.

3. The molecular sieve crystallization high-temperature tail gas odor treatment device according to claim 2, characterized in that: The chiller (12) is connected to the water inlet of the primary heat exchanger (2), the water outlet of the primary heat exchanger (2) is connected to the water inlet of the secondary heat exchanger (3), and the water outlet of the secondary heat exchanger (3) is connected to the cooling water storage tank (10).

4. The molecular sieve crystallization high-temperature tail gas odor treatment device according to claim 1, characterized in that: The water vapor separation tank (9) is connected to the material transfer pump (8).

5. The molecular sieve crystallization high-temperature tail gas odor treatment device according to claim 1, characterized in that: A circulation pump (6) is provided on one side of the tail gas absorption tower (7), the inlet of the circulation pump (6) is connected to a water tank at the bottom of the tail gas absorption tower (7), and the outlet of the circulation pump (6) is connected to a spray pipe inside the tail gas absorption tower (7); a water supply port B (4) is provided on the tail gas absorption tower (7).

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