Multi-stage spraying absorption tower

Abstract

The utility model relates to a multistage spraying absorption tower which is characterized in that the multistage spraying absorption tower comprises a first tower body, a second tower body and an absorbent solution tank, the first tower body and the second tower body are arranged above the absorbent solution tank, the lower ends of the first tower body and the second tower body are communicated with the absorbent solution tank, and the lower ends of the first tower body and the second tower body are communicated with the absorbent solution tank. A first tower packing layer and a second tower spraying layer are arranged in the first tower body and the second tower body respectively, and a first gas uniform distributor communicated with a first tower gas inlet pipeline is arranged in the portion, below the first tower packing layer, of the first tower body. A second gas uniform distributor communicated with the gas inlet pipeline of the second tower is also arranged in the tower body of the second tower below the spraying layer of the second tower; and the gas inlet pipeline of the second tower is communicated with a gas outlet in the top of the tower body of the first tower through a communicating pipeline. According to the utility model, the two absorption towers are communicated and integrally designed, so that the treatment capacity of the absorption towers is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste gas treatment and overhauling gas treatment technical field, specifically to a kind of multistage spray's absorption tower. BACKGROUND

[0002] The waste gas discharged by petroleum, petrochemical, fine chemical production contains a large amount of volatile VOCs gas, particulate matter, water vapor, malodorous components, etc. Direct discharge of these VOCs waste gas will cause serious impact on the environment, such as causing photochemical smog, destroying the ozone layer, and exacerbating the greenhouse effect, etc. Moreover, VOCs waste gas will also cause harm to human health, such as causing respiratory diseases, damaging the nervous system, and even causing cancer, etc. The state limits the emission of VOCs and has introduced relevant environmental protection regulations, and local governments implement stricter emission standards and treatment requirements. For VOCs treatment, existing technologies include condensation technology, absorption technology, adsorption technology, combustion technology, and biotechnology, etc. Nowadays, people often use absorption towers to treat VOCs waste gas, but the existing absorption tower has great limitations, as it can only be treated by absorption technology, with limited treatment capacity, which cannot meet the demand. Therefore, it is particularly important to design a multistage spray's absorption tower to solve the above problems. SUMMARY

[0003] The utility model discloses a multistage spray's absorption tower which solves the above problems, and the two absorption towers are connected and designed integrally, greatly increasing the treatment capacity of the absorption tower.

[0004] To solve the above technical problems, the utility model provides a kind of multistage spray's absorption tower, it is characterized by: including one tower body, two tower body and absorbent solution tank, the one tower body and the two tower body of absorbent solution tank are arranged at the top, the lower end of one tower body and two tower body are communicated with absorbent solution tank, one tower filler layer and two tower spray layer are respectively arranged in one tower body and two tower body, first gas distributor that is communicated with one tower inlet pipe is arranged in the one tower body below one tower filler layer, second gas distributor that is communicated with two tower inlet pipe is also arranged in the two tower body below two tower spray layer, two tower inlet pipe is communicated with the outlet of the top of one tower body by communicating pipeline, the one tower body and the two tower body are all provided with spray layer, demister and demister spray structure.

[0005] Further, two liquid storage chambers are provided in the absorbent solution tank, and the two liquid storage chambers are controlled to be connected or closed by a communicating valve arranged therebetween. The one tower body and the two tower body are respectively arranged directly above the two liquid storage chambers connected thereto.

[0006] Further, the first tower body above the first tower filler layer is provided with a first tower spray layer, the first tower spray layer is communicated with a liquid storage chamber below the first tower body through a first tower absorption liquid circulating pump, a first tower demister is arranged in the first tower body above the first tower spray layer, and a first tower demister spray structure is arranged above the first tower demister and between the first tower demister and the first tower spray layer.

[0007] Further, the second tower body above the second tower filler layer is provided with a second tower spray layer, the second tower spray layer is communicated with a liquid storage chamber below the second tower body through a second tower absorption liquid circulating pump, a second tower demister is arranged in the second tower body above the second tower spray layer, and a second tower demister spray structure is arranged above the second tower demister and between the second tower demister and the second tower spray layer.

[0008] Further, the bottom of the first tower spray layer and the second tower spray layer is provided with a plurality of spray heads, and the spray directions of the plurality of spray heads are staggered.

[0009] After the above structure is adopted, the beneficial effects of the present application are as follows:

[0010] 1. The two absorption towers are communicated and designed integrally, so that the processing capacity of the absorption tower is greatly increased.

[0011] 2. The spray layer, the demister and the demister spray structure are arranged in the absorption tower body, so that different components of VOCs can be processed in sections, different types of absorbents are arranged, different components in different ranges are processed in sections, for example, the first spray tower can absorb and process low-melting-point and low-boiling-point organic matters, and the second spray tower can absorb and process high-melting-point and high-boiling-point organic matters, so that the comprehensive processing capacity of VOCs is improved, and the practicality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0013] Figure 1 Fig. 1 is a structural schematic view of the present application.

[0014] Figure 2 Fig. 3 is a layout schematic view of the first gas distributor and the first tower gas inlet pipeline.

[0015] In the figure: 1 is a tower body of a first tower, 2 is a gas inlet pipeline of the first tower, 3 is an absorbent solution tank, 4 is a packing layer of the first tower, 5 is a spraying layer of the first tower, 6 is a demister of the first tower, 7 is an absorbent solution circulating pump of the first tower, 8 is a connecting pipeline, 9 is a connecting valve, 10 is a gas inlet pipeline of a second tower, 11 is a tower body of the second tower, 12 is a packing layer of the second tower, 13 is a spraying layer of the second tower, 14 is a demister of the second tower, 15 is an absorbent solution circulating pump of the second tower, 16 is a spraying structure of the demister of the first tower, and 17 is a spraying structure of the demister of the second tower. DETAILED DESCRIPTION

[0016] As shown in the figure, the multi-stage spraying absorption tower comprises a tower body 1 of a first tower, a tower body 11 of a second tower and an absorbent solution tank 3, the tower body of the first tower and the tower body of the second tower are arranged above the absorbent solution tank, the lower ends of the tower body of the first tower and the tower body of the second tower are connected with the absorbent solution tank, the tower body of the first tower and the tower body of the second tower are respectively provided with a packing layer 4 of the first tower and a packing layer 12 of the second tower, the tower body of the first tower below the packing layer of the first tower is provided with a first gas distributor connected with the gas inlet pipeline 2 of the first tower, the tower body of the second tower below the spraying layer of the second tower is also provided with a second gas distributor connected with the gas inlet pipeline 10 of the second tower, the gas inlet pipeline of the second tower is connected with the gas outlet at the top of the tower body of the first tower through the connecting pipeline 8, and the tower body of the first tower and the tower body of the second tower are respectively provided with a spraying layer, a demister and a spraying structure of the demister. Figure 1 Figure 2 The two absorption towers are connected and designed integrally, different components of VOCs can be treated in sections, different types of absorbents are arranged to treat different components in sections, for example, the first spraying tower can be used for absorbing and treating low-melting-point and low-boiling-point organic matters, the second spraying tower can be used for absorbing and treating high-melting-point and high-boiling-point organic matters, and the same absorbent can also be used for absorbing and treating VOCs gas with all components, so that the comprehensive treatment ability of VOCs is improved, and the practicality is improved.

[0017] As shown in the figure, two liquid storage chambers are arranged in the absorbent solution tank, the two liquid storage chambers are connected or closed through the connecting valve 9 arranged therebetween, and the tower body of the first tower and the tower body of the second tower are arranged directly above the two liquid storage chambers connected therewith. Figure 1 The two liquid storage chambers can be stored respectively or connected to form a large solution tank.

[0018] As shown in the figure, the two liquid storage chambers are connected through the connecting valve 9 arranged therebetween. Figure 1 ​The tower body 1, above the packing layer, includes a spray layer 5. This spray layer is connected to the storage chamber directly below the tower body via a circulating absorbent pump 7. A demister 6 is also installed above the spray layer within the tower body. A demister spray structure 16 is installed above the demister and between the demister and the spray layer. Waste gas is evenly dispersed into the tower body 1 via gas pipes and a gas distributor. The absorbent is pumped from the absorbent solution tank 3 to the spray layer 5 via the circulating absorbent pump 7. The absorbent adheres to the packing layer 4, and the waste gas and absorbent react fully within the packing layer 4. The reacted waste gas undergoes gas-liquid separation via the demister 6 to ensure the outlet moisture content meets the downstream operating conditions.

[0019] like Figure 1 The No. 2 tower body, above the packing layer shown, includes a No. 2 tower spray layer 13. This spray layer is connected to the storage chamber directly below the No. 2 tower body via a No. 2 absorbent circulation pump 15. A No. 2 tower demister 14 is installed inside the No. 2 tower body above the spray layer. A No. 2 tower demister spray structure 17 is installed above the demister and between the demister and the spray layer. The treated waste gas is transported to the No. 2 absorption tower through pipelines and evenly dispersed into the interior of the No. 2 tower body 11 via gas pipelines and a gas distributor. The absorbent is pumped from the absorbent solution tank 3 to the spray layer 13 via the No. 2 absorbent circulation pump 15, adhering to the spray layer 13. The waste gas and absorbent react fully in the No. 2 tower packing layer 12. The reacted waste gas undergoes gas-liquid separation via the No. 2 tower demister 14.

[0020] like Figure 1 The bottom of the spray layers in towers one and two shown are equipped with several nozzles, and the spraying directions of these nozzles are staggered. This design allows the spray coverage to reach 200% of the tower's inner diameter, increasing the mixing degree between the waste gas and the absorption solution, thereby improving the absorption efficiency.

[0021] The absorbent circulation pump in this design uses frequency conversion control, which can be adjusted in real time according to the concentration, composition and flow rate of the waste gas to ensure the removal rate of waste gas. The inlet pipe is equipped with a gas distributor, which ensures that the gas is evenly distributed in the tower, so that the gas and absorbent solution can be better mixed and react fully. Each spray device is connected to an independent liquid supply system, which can flexibly adjust the type and flow rate of the spray liquid according to the composition and concentration of the waste gas, thereby enhancing the targeting and effectiveness of waste gas treatment.

[0022] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical scheme falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application are deemed to be within the protection scope of the present application.

Claims

1. A multi-stage spray absorbing tower characterized by: The utility model relates to a double-tower absorption tower, including a first tower body (1), a second tower body (11) and an absorbent solution tank (3), the first tower body and the second tower body are arranged at the top of the absorbent solution tank, the lower end of the first tower body and the second tower body are communicated with the absorbent solution tank, a first tower filler layer (4) and a second tower spray layer (13) are arranged in the first tower body and the second tower body respectively, a first gas distributor is arranged in the first tower body below the first tower filler layer and communicated with a first tower gas inlet pipeline (2), a second gas distributor is also arranged in the second tower body below the second tower spray layer and communicated with a second tower gas inlet pipeline (10), the second tower gas inlet pipeline is communicated with the gas outlet at the top of the first tower body through a connecting pipeline (8), and the first tower body and the second tower body are provided with a spray layer, a demister and a demister spray structure.

2. A multi-stage spray absorption column according to claim 1, wherein: Two liquid storage chambers are formed in the absorbent solution tank and are communicated or closed by a connecting valve (9) arranged between the two liquid storage chambers, and the first tower body and the second tower body are arranged directly above the two liquid storage chambers communicated with the first tower body and the second tower body respectively.

3. A multi-stage spray absorbing tower according to claim 2, characterized in that: A first tower spray layer (5) is arranged in the first tower body above the first tower filler layer, the first tower spray layer is communicated with the liquid storage chamber directly below the first tower body through a first tower absorbent liquid circulating pump (7), a first tower demister (6) is further arranged in the first tower body above the first tower spray layer, and a first tower demister spray structure (16) is arranged above the first tower demister and between the first tower demister and the first tower spray layer.

4. A multi-stage spray absorbing tower according to claim 2, wherein: A second tower spray layer (13) is arranged in the second tower body above the second tower filler layer, the second tower spray layer is communicated with the liquid storage chamber directly below the second tower body through a second tower absorbent liquid circulating pump (15), a second tower demister (14) is arranged in the second tower body above the second tower spray layer, and a second tower demister spray structure (17) is arranged above the second tower demister and between the second tower demister and the second tower spray layer.

5. A multi-stage spray absorbing tower according to claim 1, wherein: The bottom of the first tower spray layer and the second tower spray layer is provided with a plurality of spray heads, and the spray directions of the plurality of spray heads are arranged in a staggered manner.

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