Chlorine-containing medium rotational flow washing integrated treatment device

Abstract

The utility model provides a chlorine-containing medium rotational flow washing integrated treatment device, the device is composed of a venturi washing module and a rotational flow washing module, the venturi washing module comprises a chlorine-containing medium input port, an alkaline washing liquid input port and a washing nozzle, and primary treatment is carried out through atomization washing. And the gas-liquid mixture enters the cyclone washing module, the module is provided with a guide vane cyclone separation washing unit, the chlorine-containing gas is further treated by utilizing cyclone separation and liquid column interception, and gas-liquid separation is realized. The device is compact in structure and easy and convenient to operate, chlorine-containing media can be effectively removed through mutual cooperation of all the modules, and an efficient and convenient scheme is provided for treatment of chlorine-containing medium gas in the current chlor-alkali chemical industry.

Description

Technical Field

[0001] The utility model relates to the technical field of chlorine-containing hazardous medium gas disposal, in particular to a chlorine-containing medium swirl washing integrated disposal device. Background Technique

[0002] In the production process of the chlor-alkali industry, it is inevitable to generate chlorine-containing waste gas. Chlorine-containing waste gas is a serious pollutant. Among them, chlorinated aromatic hydrocarbons have biological toxicity, and their chemical properties are stable, making them difficult to be biodegradable and remaining persistent in the environment, posing a serious threat to the ecological environment and human health. In recent years, huge economic losses caused by the leakage of chlorine-containing waste gas have occurred from time to time.

[0003] Currently, the main conventional methods for disposing of high-risk chlorine-containing media include the synthetic hydrochloric acid method, the liquid chlorine generation method, and the chlorine recovery method. However, the above methods generally have problems such as low grading disposal efficiency, an upper limit on the processing capacity, and a large floor area of the device, making it difficult to meet the disposal requirements of high-risk chlorine-containing media.

[0004] For example, the publication number CN1883769A discloses a purification method and device for chlorine-containing waste gas. The device is a device in which chlorine-containing waste gas is introduced into two scrubbers and a separation tower connected in series. Lime milk is sprayed on the upper parts of the first and second scrubbers. Through the chemical action of the lime milk and the chlorine-containing waste gas in the tower, the chlorine content in the chlorine-containing waste gas is greatly reduced, achieving the effect of purifying the chlorine-containing waste gas. The purified waste gas coming out of the second scrubber enters the separation tower for gas-liquid separation. The purified waste gas is sent to the chimney for emission through the gas outlet at the upper part of the separation tower by a fan. This invention can operate continuously and has a good purification effect in production. However, this device is used for the treatment of high-concentration chlorine-containing waste gas, with a large amount of reagent used and poor economy. In addition, this device has a large floor area and high maintenance costs, and cannot effectively dispose of suddenly leaked chlorine-containing waste gas in a timely manner.

[0005] Publication No. CN101634453A discloses a flue gas quenching process and device for incineration of chlorine-containing waste liquid and waste gas. The process feeds chlorine-containing waste liquid / waste gas into an incinerator, reacts with sufficient oxygen in the incinerator, and the organic matter therein is oxidized and decomposed into CO2, H2O, HCl and a very small amount of Cl2, etc. The high-temperature flue gas directly enters the quenching tower, and is rapidly cooled to below 90°C under the action of cooling water, and then enters the packing tower for alkali washing and then discharged into the atmosphere through the chimney. The equipment mainly includes an incinerator, which is connected to a waste liquid / waste gas supply system, a fuel system and a combustion-supporting air system. The tail of the incinerator is also directly connected to a quenching tower, which sprays dilute hydrochloric acid by a cooling water ring to cool the flue gas and absorb HCl in the flue gas; the quenching tower is connected to the alkali absorption system of the packing tower. The device can effectively reduce the generation of dioxins and meet the requirements of environmental protection and energy saving. However, the device will produce a large amount of absorption waste liquid during operation, and a special cooling device is required, which consumes a large amount of cooling water. In addition, the device occupies a large area, has high maintenance costs, and cannot effectively deal with sudden leakage of chlorine-containing waste gas in a timely manner. Summary of the invention

[0006] In order to solve the problems of low chlorine-containing medium disposal efficiency, upper limit of treatment volume and large device footprint in the prior art, the utility model provides a chlorine-containing medium cyclone washing integrated disposal device using cyclone washing, which washes the chlorine-containing medium gas once through atomization, intercepts the chlorine-containing medium gas through a liquid column washing, and separates the chlorine-containing medium gas once through cyclone separation, thereby completing the washing and separation disposal of the chlorine-containing medium gas.

[0007] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0008] A chlorine-containing medium cyclone washing integrated treatment device, comprising a Venturi washing module (1) and a cyclone washing module (2), characterized in that the Venturi washing module (1) comprises a Venturi washing pipe (14) and a chlorine-containing medium input port (11) connected to an external suction power, a liquid inlet pipe (16) is located at the tapered section of the Venturi washing pipe (14), has an alkaline washing liquid input port (12) and a washing nozzle (15), and a primary washing output port (13) is located at the connection between the Venturi washing pipe and the cyclone washing module (2);

[0009] The cyclone washing module (2) comprises a cylindrical barrel with a conical bottom, a tangential input port (21) is provided at the bottom of the barrel to communicate with the primary washing output port (13) of the venturi washing module (1), an upper side wall has a tangential clean gas outlet (23), a waste liquid outlet (22) is provided at the bottom end of the conical bottom, and a guide vane cyclone washing module (3) is provided in the barrel below the tangential clean gas outlet (23);

[0010] The flow guiding vane cyclone washing module (3) includes flow guiding vanes (31) fixedly connected to the side wall of the cylinder and tangent to the side wall of the cylinder. A liquid supplement pipe (32) with liquid supplement holes (33) is arranged at the center of the flow guiding vanes (31) and coaxially with the flow guiding vanes. The liquid supplement holes (33) are evenly distributed along the axial direction.

[0011] The swirling direction inside the cylinder of the swirling washing module (2) is the same as the rotating direction of the flow guiding vanes (31) in the flow guiding vane cyclone washing module (3).

[0012] The number of liquid supplement holes (33) between adjacent two layers of flow guiding vanes (31) is adjusted according to the total treatment amount of the chlorine-containing medium.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. In the venturi washing module of the present utility model, the alkaline washing liquid is supplemented according to the self-priming principle, and the liquid supplement amount is automatically adjusted with the suction treatment amount of the external suction power equipment. Thus, the alkaline washing liquid and the chlorine-containing medium gas are fully mixed and reacted in the venturi washing pipe. In this process, while realizing the full one-time washing reaction of the alkaline washing liquid and the chlorine-containing medium gas in the venturi washing pipe, it avoids the waste caused by excessive alkaline washing liquid, reduces the cost, and improves the economic benefits.

[0015] 2. In the flow guiding vane cyclone washing module of the present utility model, the alkaline washing liquid forms a uniform liquid column in the flow guiding vanes through the liquid supplement holes on the perforated liquid supplement pipe. While intercepting the chlorine-containing medium gas, it also forms a uniform liquid film on the blade surface along the flow guiding vanes, increasing the interception surface area of the chlorine-containing medium gas, being more conducive to the capture of the chlorine-containing medium by the alkaline washing liquid droplets, further deepening the secondary washing process of the chlorine-containing medium gas, and ensuring the washing efficiency of the device for the chlorine-containing medium gas.

[0016] 3. The device of the present utility model has a compact structure and is integrated. It is not affected by the terrain environment, can effectively dispose of sudden leakage of chlorine-containing medium gas in a timely manner, and can effectively dispose of the chlorine-containing medium gas through the primary washing in the venturi washing module, the secondary washing in the flow guiding vane cyclone washing module, and the gas-liquid separation process. In this process, both the washing efficiency and the economic benefits are ensured. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings will be briefly described below. It should be noted that the drawings are provided to further understand the present utility model. It only constitutes a part of this specification to further explain the present utility model and does not constitute a limitation to the present utility model. And in the drawings, each part is not necessarily drawn according to the actual proportion.

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

[0019] Among them: 1. Venturi scrubbing module; 11. Chlorine-containing medium input port; 12. Alkaline scrubbing liquid input port; 13. Primary scrubbing output port; 14. Venturi scrubbing pipe; 15. Scrubbing nozzle; 16. Liquid inlet pipe; 2. Cyclone scrubbing module; 21. Tangential input port; 22. Waste liquid outlet; 23. Tangential clean gas outlet; 3. Guide vane cyclone scrubbing module; 31. Guide vane; 32. Supplementary liquid pipe; 33. Supplementary liquid hole.

[0020] Figure 2 This is a schematic cross-sectional structure diagram of the Venturi scrubbing module of the present utility model.

[0021] Among them: 11. Chlorine-containing medium input port; 12. Alkaline scrubbing liquid input port; 13. Primary scrubbing output port; 14. Venturi scrubbing pipe; 15. Scrubbing nozzle; 16. Liquid inlet pipe.

[0022] Figure 3 This is a schematic cross-sectional structure diagram of the guide vane cyclone scrubbing module of the present utility model.

[0023] Among them: 31. Guide vane; 32. Supplementary liquid pipe; 33. Supplementary liquid hole. Specific embodiments

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. However, it should be understood that these embodiments are only used to illustrate the present utility model and do not constitute a limitation to the scope of the present utility model. The test methods without specific conditions noted in the following embodiments are usually carried out under conventional conditions or according to the conditions recommended by the manufacturer. Unless otherwise specified, all percentages and parts are by weight.

[0025]

Embodiment 1

[0026] The chlorine-containing medium cyclone washing integrated disposal device includes a Venturi washing module 1 and a cyclone washing module 2. The Venturi washing module 1 has a chlorine-containing medium input port 11, an alkaline washing liquid input port 12, and a primary washing output port 13. An external suction power device is connected to the chlorine-containing medium input port 11 to suck the chlorine-containing medium gas into the Venturi washing module 1. During this process, a negative pressure environment is formed inside the Venturi washing pipe 11. Under the action of the negative pressure, the alkaline washing liquid enters the Venturi washing module 1 through the alkaline washing liquid input port 12 and reacts with the chlorine-containing medium gas in a primary washing reaction. During this process, the alkaline washing liquid becomes small droplets under the atomization and fragmentation action of the washing nozzle 15, with an increased specific surface area. The two-phase mixture flows tangentially through the primary washing output port 13 and enters the cyclone washing cylinder module 2. This process will cause the two-phase mixture flow to generate a swirling motion after entering the cyclone washing cylinder, extending the washing time and enabling the alkaline washing liquid and the chlorine-containing medium gas to be fully mixed and react. An external liquid supplement power device is connected to the perforated liquid supplement pipe 32 in the guide vane cyclone washing module 3 for liquid supplement. The alkaline washing liquid forms a uniform liquid column inside the guide vane cyclone washing module 3 through the liquid supplement holes 33 on the perforated liquid supplement pipe 32. The chlorine-containing medium collides with the liquid column inside the guide vane 31 to undergo a secondary washing reaction. At the same time, under the action of the guide vane 31, the gas-liquid two-phase flow is forced to undergo a strong swirling motion. The smaller droplets collide and coalesce in the swirling field to become larger droplets. Due to the density and size differences between the gas-liquid two-phase, they have different dynamic characteristics under the coupled action of the swirling field and the gravitational field, and are given different migration speeds and displacements. The liquid phase is thrown to the wall of the cyclone washing cylinder by the larger centrifugal force and separated from the two-phase fluid to complete gas-liquid separation. The cyclone washing cylinder module 2 is provided with a waste liquid outlet 22 and a tangential clean gas outlet 23. The waste liquid generated inside the cyclone washing cylinder is discharged through the waste liquid outlet 22, and the clean gas is discharged through the tangential clean gas outlet 23.

[0027] As Figure 3 shown, according to the suction treatment capacity of the external suction power device, the adjustment range of the number of layers of the guide vanes in the guide vane cyclone washing module 3 is 4 - 12. The guide vane 31 is tangent to the perforated liquid supplement pipe 32 and the side wall of the cyclone washing cylinder, rotates around the central axis, and the rotation direction is the same as the direction of the tangential input port 21 of the cyclone washing cylinder module 2.

[0028]

Example 2

[0029] As Figure 3 shown, according to the suction treatment capacity of the external suction power device, the adjustment range of the number of liquid supplement holes 33 between two adjacent layers of guide vanes 31 in the guide vane cyclone washing module 3 is 4 - 16. The liquid supplement holes 33 are evenly distributed around the central axis, so as to form a uniform liquid column inside the guide vane cyclone washing module 3.

[0030] The cross-sectional shape of the liquid replenishment hole 33 can be regular and uniform, such as circular, rectangular, etc. The liquid replenishment volume of the external liquid replenishment power device is adjusted according to the suction treatment volume of the external suction power device. The cross-sectional shape of the liquid replenishment hole 33 can be adjusted according to the liquid replenishment volume to ensure the largest liquid column area in contact with the chlorine-containing medium gas, so that the chlorine-containing medium gas can be fully washed.

[0031]

Example 3

[0032] Simulate the leakage of chlorine-containing medium gas in the laboratory, and use the device of the present utility model to treat the leaked chlorine-containing medium gas. The total flow rate of the simulated chlorine-containing medium gas is 10 m3 / h, the volume ratio of the chlorine-containing medium is 0% to 100%, and the volume ratio of the chlorine-containing medium starts from 0% and is increased by 25% for each group of experiments. The alkaline washing liquid is 0.1 mol / L sodium hydroxide solution.

[0033] Design parameters: Assemble the device of the present utility model as shown in Figure 1 . The number of layers of the guide vanes in the guide vane cyclone washing module 3 is set to 8. The guide vanes 31 are tangent to the perforated liquid replenishment pipe 32 and the side wall of the cyclone washing cylinder, rotate around the central axis, and the rotation direction is the same as the tangential input port 21 direction of the cyclone washing cylinder module 2. The cross-sectional shape of the liquid replenishment hole 33 is set to a regular and uniform circle and is evenly distributed along the axis.

[0034] Practical effect: After the leaked chlorine-containing medium gas is treated by the device of the present utility model, the measured mass concentration of the chlorine-containing medium in the final discharged gas of the four groups of experiments is less than 0.8 mg / m3, meeting the national environmental protection discharge standard of GB 11984-2008.

Claims

1. A chlorine-containing medium swirl washing integrated treatment device, comprising a Venturi washing module (1) and a swirl washing module (2), characterized in that, The Venturi scrubbing module (1) includes a Venturi scrubbing pipe (14) and a chlorine-containing medium input port (11) communicating with an external suction power. The liquid inlet pipe (16) is located in the tapered section of the Venturi scrubbing pipe (14), and has an alkaline scrubbing liquid input port (12) and a scrubbing nozzle (15). The primary scrubbing output port (13) is located at the connection between the Venturi scrubbing pipe and the cyclone scrubbing module (2). The cyclone scrubbing module (2) includes a cylindrical barrel with a conical bottom. The lower part of the barrel is provided with a tangential input port (21) communicating with the primary scrubbing output port (13) of the Venturi scrubbing module (1). The upper side wall has a tangential clean gas outlet (23). The bottom end of the conical bottom has a waste liquid outlet (22). A guide vane cyclone scrubbing module (3) is arranged in the barrel below the tangential clean gas outlet (23). The guide vane cyclone scrubbing module (3) includes guide vanes (31) fixedly connected to the side wall of the barrel and tangent to the side wall of the barrel. A liquid supply pipe (32) with liquid supply holes (33) is arranged at the center of the guide vanes (31) and coaxial with the guide vanes. The liquid supply holes (33) are evenly distributed along the axial direction.

2. The integrated chlorine-containing medium cyclone washing and disposal device according to claim 1, characterized in that, The swirling direction in the barrel of the cyclone scrubbing module (2) is the same as the rotating direction of the guide vanes (31) in the guide vane cyclone scrubbing module (3).

3. The integrated treatment device for chlorine-containing medium cyclone washing as claimed in claim 1, wherein, The number of the liquid supply holes (33) between adjacent two layers of guide vanes (31) is adjusted according to the total treatment amount of the chlorine-containing medium.

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