CN102853435A - Dual-tower shock-cooling and sprinkling desulphurization purification integrated smoke purifying device - Google Patents

Abstract

The invention relates to a flue gas purification device integrated with double-tower quenching, spraying, desulfurization and purification, which includes a flue gas quenching tower and a desulfurization purification device, and is characterized in that the flue gas quenching tower and the desulfurization purification device are set to include a flue gas quenching tower, The integrated device of spray desulfurization purification tower, cooling water tank and lye tank; the tops of cooling water tank and lye tank are fixedly connected to the quench tower and spray desulfurization purification tower respectively, and the upper part of the flue gas quench tower body is provided with flue gas inlet and connection The gas-liquid nozzle for compressed gas and cooling water of the cooling water tank, and the bottom of the water return port are set. The upper part of the spray desulfurization purification tower is provided with a flue gas outlet and a spray head connected to the lye tank. The deflector and the liquid return port, and the bottom of the flue gas quenching tower communicate with the flue gas inlet at the bottom of the spiral deflector through the connecting flue. The beneficial effects of the invention are: compact structure, small body and light weight, excellent effects of rapid cooling and spraying desulfurization and purification, and clean production is realized.

Description

A flue gas purification device integrated with twin-tower quenching, spray desulfurization and purification

technical field

The invention relates to a flue gas quenching and desulfurization purification device in the field of medical waste treatment, in particular to a twin-tower type quenching, spray desulfurization and purification integrated flue gas purification device suitable for vehicle-mounted small medical waste treatment facilities.

Background technique

Medical waste is a special hazardous waste with wide influence and great harm. It ranks first in the National Catalog of Hazardous Wastes. If it is not handled properly or discarded arbitrarily and spreads into the living environment, it can lead to the spread of germs and epidemics, posing a great threat to the lives and health of the people.

At present, designated units for centralized treatment of medical waste have been set up in large and medium-sized cities in my country. However, the medical waste produced by small and medium-sized medical institutions in areas below the county level, especially in the vast rural areas, is difficult to be included in the medical wastes above the city level due to the wide distribution or remote location, the small amount of production, and the high transportation costs. The centralized collection and processing network has become a blind spot for medical waste disposal. According to the relevant state regulations, in rural areas that do not have the conditions for centralized disposal of medical waste, medical and health institutions should dispose of the medical waste they generate on the spot according to the requirements. If they can be incinerated, they should be incinerated in time; . In response to the above requirements, in recent years, the field of medical waste treatment has been concentrating on the research of vehicle-mounted medical waste ashing facilities, so as to realize the convenient and environmentally friendly treatment of small batches and timely treatment of small batches. Way.

Flue gas cooling, desulfurization and purification are important processes in the ashing treatment of medical waste, but the existing large-scale medical waste treatment system uses a flue gas quenching tower and a multi-stage desulfurization purification device due to the large amount of flue gas to be processed and the complex composition of the flue gas. Form a flue gas purification system with scattered layout, large volume, large floor area and complex operation. In addition, the desulfurization purification adopts dry or semi-dry process, which consumes a large amount of deoxidizer and produces a large amount of desulfurization waste. Improper treatment can easily cause secondary pollution. Above defect all can't be applicable to vehicle-mounted small medical waste ashing facility. How to realize the miniaturization and portability of the device, meet the process requirements of ashing treatment of medical waste, and prevent secondary pollution has become a problem explored by the industry.

Contents of the invention

The main purpose of the present invention is to address the above problems, to provide a dual-tower type quenching, spray desulfurization and purification integrated flue gas purification device suitable for vehicle-mounted small medical waste treatment facilities, and can meet the technological requirements of ashing treatment of medical waste , to achieve clean production.

The technical solution adopted by the present invention to solve its technical problems is:

A double-tower type quenching, spraying desulfurization purification integrated flue gas purification device, including a flue gas quenching tower, a desulfurization purification device, characterized in that the flue gas quenching tower and desulfurization purification device are set to include a flue gas quenching tower, a spraying The integrated device of desulfurization purification tower, cooling water tank and lye tank; the quench tower and spray desulfurization purification tower are respectively fixedly connected to the top of the cooling water tank and lye tank, and the upper part of the flue gas quench tower body is provided with a flue gas inlet And the gas-liquid nozzle connected to the compressed gas and the cooling water of the cooling water tank, the bottom is provided with a return port, the upper part of the spray desulfurization purification tower is provided with a flue gas outlet and a spray head connected to the lye tank lye, at the bottom of the spray desulfurization purification tower A spiral deflector and a liquid return port for forming swirling flue gas are provided, and the bottom of the flue gas quenching tower communicates with the flue gas inlet at the bottom of the spiral deflector through a connecting flue.

The spiral deflector includes a cylinder whose top surface is a closed cover and the bottom is open, and a number of strip-shaped exhaust ports are arranged on the circumferential side wall of the cylinder parallel to the center line of the cylinder and evenly distributed across the side wall of the cylinder. , on the outer cylinder wall of each strip-shaped exhaust port, an inclined guide vane is arranged along the strip-shaped exhaust port.

The included angle θ between the inclined baffle and the cylindrical section passing through the connecting portion of the inclined baffle and the side wall of the cylinder is 30°-70°.

The closed cover on the top surface of the cylinder is a sandwich curved cover with an upper surface convex and a lower surface convex downward.

The water return port of the flue gas quenching tower and the liquid return port of the spray desulfurization purification 45 tower are respectively connected to the cooling water tank and the lye tank through the return water dust collection net and the liquid return dust collection net through pipelines.

The beneficial effects of the present invention are: to provide a double-tower quenching, spray desulfurization and purification integrated flue gas purification device using a wet process, the flue gas quenching tower, spray desulfurization purification tower, cooling water tank and lye tank Integrated into one, compared with the traditional external cooling water and lye pipeline structure, it has compact structure, small body and light weight, strong portability, no desulfurization waste, no external discharge of circulating water, realizing clean production and preventing secondary pollution . The rapid cooling effect is good, and the time for flue gas to drop from 600°C to 200°C is less than 1 second. In particular, the spiral deflector is installed in the spray desulfurization purification tower, which improves the desulfurization purification effect, and the desulfurization efficiency is greater than 89%. The dust removal efficiency of the flue gas with a particle size of <10 μm is higher than 95%, and the removal rate of dioxins in the flue gas is higher than 96%, which meets the technological requirements for ashing treatment of medical waste.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a cross-sectional view of the helical deflector in Fig. 1 .

In the figure: 1 flue gas quenching tower, 11 flue gas inlet, 12 water return port, 13 water adding port, 14 lye adding port, 2 spray desulfurization purification tower, 21 flue gas outlet, liquid return port 22, 3 spray head, 41-42 water pump, 5 conjoined tanks, 51 cooling water tank, 52 lye tank, 61-62 dust collection net, 7 connecting flue, 8 gas-liquid nozzle, 9 spiral deflector, 91 strip exhaust port, 92 Inclined deflectors, 10 compressors.

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Detailed ways

Figures 1 to 2 show a double-tower quenching, spray desulfurization and purification integrated flue gas purification device, including a flue gas quenching tower and a desulfurization purification device, which are characterized in that the flue gas quenching tower and the desulfurization purification device are arranged as An integrated device including flue gas quenching tower 1 , spray desulfurization purification tower 2 , cooling water tank 51 and lye tank 52 ; The tops of the cooling water tank 51 and the lye tank 52 are respectively fixedly connected to the above-mentioned flue gas quenching tower 1 and the spray desulfurization purification tower 2, and the upper part of the quenching tower body is provided with a flue gas inlet 11 and a gas-liquid nozzle 8 communicating with compressed gas and cooling water. , The bottom is provided with a water return port 12. In this example, the flue gas inlet 11 is set on the top of the flue gas quenching tower body, the gas-liquid nozzle 8 is set on the upper part of the flue gas quenching tower body through the side wall of the tower body, and the cooling water in the cooling water tank 51 is delivered to the gas by the water pump 41. The liquid spray head 8, the compressed gas is supplied to the gas-liquid spray head 8 by the compressor 10 through the gas pipeline.

The upper part of the spray desulfurization purification tower 2 is provided with a flue gas outlet 21 and a spray head 3 communicating with the lye tank 52 for lye. In this example, the flue gas outlet 21 is set on the top of the spray desulfurization purification tower body, the spray head 3 is set on the upper part of the flue gas quenching tower body through the side wall of the tower body, and the spray head 3 adopts a commercially available spiral nozzle. A spiral deflector 9 and a liquid return port 22 forming a swirling flue gas are arranged at the bottom of the spray desulfurization purification tower. The spiral deflector 9 includes a cylinder whose top surface is a closed cover and the bottom is open. On the side wall parallel to the center line of the cylinder, a number of strip-shaped exhaust ports 91 are arranged longitudinally through the side wall of the cylinder body, and on the outer cylinder wall of each strip-shaped exhaust port, inclined guide vanes 92 are arranged along the strip-shaped exhaust ports. , as shown in Figure 2, the angle θ between the inclined guide vane 92 and the cylindrical section passing through the connecting portion of the guide vane and the side wall of the cylinder body is 30°-70°. The bottom of the flue gas quenching tower communicates with the flue gas inlet at the bottom of the spiral deflector 9 through the connecting flue 7 . Through the strip-shaped exhaust port of the spiral deflector and the inclined deflector vane, the flue gas entering from the bottom of the spiral deflector forms a high-speed vortex airflow, which can fully contact with the spray lye from top to bottom, Achieve good desulfurization and dust removal purification effect. In particular, the closed cover on the top surface of the cylinder is a sandwich curved cover with an upper surface convex and a lower surface convex downward. In this way, the formation of turbulent flow can be prevented in the cylinder, which is more conducive to the desulfurization and purification of flue gas.

In order to filter out smoke and dust, the return port 12 of the flue gas quenching tower and the return port 22 of the spray desulfurization purification tower are respectively connected to the cooling water tank 51 and the lye tank 52 through the return water dust collection net 61 and the return liquid dust collection net 62 through pipelines .

When the present invention is applied in a vehicle-mounted small-scale medical waste treatment facility, the flue gas produced by the combustion of medical waste in the first combustion chamber of the rapid ashing furnace enters the second combustion chamber, and the temperature in the second combustion chamber can reach 850-900°C, and the flue gas is in the second combustion chamber. After the secondary combustion treatment in the secondary combustion chamber, most of the organic gases are removed, and the remaining high-temperature flue gas enters the flue gas quenching tower 1 and the spray desulfurization purification tower 2 sequentially under the action of the system induced draft negative pressure. The flue gas quenching tower adopts The commercially available high-efficiency atomizing gas-liquid nozzle, because the compressed air and cooling water passed through the gas-liquid nozzle form a high-speed downward water mist, which flows in the same direction as the downward flue gas and fully contacts, so that the temperature of the high-temperature flue gas drops rapidly. During the operation, the flue gas after quenching enters the lye spray desulfurization purification tower 2, and the flue gas removes most of the acid gas and further cools down. The temperature of the flue gas after the treatment of the above two towers can be reduced to 100 ℃ ~ 150 ℃ , to meet the requirements of quenching and spraying desulfurization purification process

The above descriptions are only preferred embodiments of the present invention, and do not impose any restrictions on the shape, material and structure of the present invention. All simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims (6)

1. a double-tower type chilling, spray desulfurizing and purifying integrated fume purifier, comprise flue gas quenching tower, desulfurization purifier, it is characterized in that the integrated apparatus that described flue gas quenching tower and desulfurization purifier are arranged to comprise flue gas quenching tower, are sprayed desulfurizing and purifying tower, cooling water tank and lye tank; Be fixedly connected with respectively described quench tower and spray desulfurizing and purifying tower at the top of cooling water tank and lye tank, gas-liquid shower nozzle, bottom that flue gas quenching tower tower body top arranges the cooling water of gas approach and connection Compressed Gas and cooling water tank arrange water return outlet, spray desulfurizing and purifying tower top arranges exhanst gas outlet and is communicated with the spray head of lye tank alkali lye, at spray desulfurizing and purifying tower inner bottom part spiral stream guidance device and the liquid return hole that forms the eddy flow flue gas is set, the flue gas quenching tower bottom is communicated with the gas approach of described spiral stream guidance device bottom by connecting flue.

2. a kind of double-tower type chilling according to claim 1, spray desulfurizing and purifying integrated fume purifier, it is characterized in that described spiral stream guidance device comprises that an end face is the cylinder of closure body bottom-open, on cylindrical shell surrounding place side wall, with the cylinder center line parallel is uniform some bar shaped exhaust outlets that pass through cylinder lateral wall are set, outside each bar shaped exhaust outlet, along the bar shaped exhaust outlet inclination flow deflector are set on the side tube-wall.

3. a kind of double-tower type chilling according to claim 2, spray desulfurizing and purifying integrated fume purifier is characterized in that the angle theta between the cylinder tangent plane of described inclination flow deflector and mistake itself and cylinder lateral wall connecting portion is 30 °-70 °.

4. according to claim 2 or 3 described a kind of double-tower type chillings, spray desulfurizing and purifying integrated fume purifier, the closure body that it is characterized in that described cylinder end face is interlayer curved surface lid protruding under the upper surface epirelief lower surface.

5. according to claim 1,2 or 3 described a kind of double-tower type chillings, spray desulfurizing and purifying integrated fume purifier, it is characterized in that described flue gas quenching tower water return outlet and the liquid return hole that is connected the desulfurizing and purifying tower respectively by pipeline through the backwater dust-collecting net be connected liquid dust-collecting net connection cooling water tank and lye tank.

6. a kind of double-tower type chilling according to claim 4, spray desulfurizing and purifying integrated fume purifier, it is characterized in that described flue gas quenching tower water return outlet and the liquid return hole that is connected the desulfurizing and purifying tower respectively by pipeline through the backwater dust-collecting net be connected liquid dust-collecting net connection cooling water tank and lye tank.

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