CN103657306A - Waste gas treatment device - Google Patents

Abstract

The invention relates to a waste gas treatment device, which includes a waste gas purifier and a waste gas collection and discharge system. The waste gas purifier consists of a waste gas washing and dust removal area, a waste gas oxidation absorption area, a waste gas alkalization absorption area, a first mist eliminator, Exhaust gas acidification absorption zone, second demister. The exhaust gas washing and dust removal area is equipped with tap water spraying device and dust wastewater collection conical tank, the exhaust gas oxidation absorption area is equipped with exhaust gas oxidation absorption components, the exhaust gas alkalization absorption area is equipped with exhaust gas alkalization absorption components, and the exhaust gas acidification absorption area is equipped with There are waste gas acidification absorption components. A heat exchanger is arranged in front of the flue gas discharge cylinder. The invention can effectively purify waste gas with relatively high dust concentration, effectively treat various organic and inorganic waste gases, various acidic and alkaline waste gases, and solve the problem of air pollution caused by waste gas sources such as factory workshops and garbage stations.

Description

Exhaust gas treatment device

technical field

The invention relates to the technical field of exhaust gas treatment, in particular to an exhaust gas treatment device with complex components.

Background technique

In recent years, the occurrence of smog has become more and more frequent, which has greatly affected people's life and work. The generation of smog is the result of a combination of various factors, and industrial waste gas emissions account for a large proportion, so the increase in waste gas pollution The governance of environmental protection has become one of the important contents of the current environmental protection work.

The Chinese patent "Complex Waste Gas Comprehensive Treatment System" (patent number: 201210235730.0) discloses a waste gas comprehensive treatment system device, which has the advantages of simple structure and high treatment efficiency. However, the patented device has the following defects: ①It is not suitable for processing complex waste gas with high dust concentration; ②When the amount of waste gas is large, the consumption of activated carbon is relatively large, and the operating cost is high.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the technical problems of the above patents and provide a treatment system device suitable for treating high-concentration dust waste gas, which can effectively treat various organic and inorganic waste gases, various acidic and alkaline waste gases.

The technical solution adopted by the present invention to solve the technical problem is: an exhaust gas treatment system device, including an exhaust gas purifier and an exhaust gas collection and discharge system for inputting and outputting exhaust gas to the exhaust gas purifier, and the interior of the exhaust gas purifier is sequentially from bottom to top It is the waste gas washing and dust removal area, the waste gas oxidation absorption area, the waste gas alkalization absorption area, the first demister, the waste gas acidification absorption area, and the second demister. The waste gas dedusting area is provided with a waste gas inlet, and the waste gas inlet is provided with a gas diversion triangle cone. The waste gas inlet is connected to the waste gas collection and delivery system through a pipeline, and a waste gas outlet is provided above the second waste gas demister.

The exhaust gas washing and dust removal area is provided with an exhaust gas washing and dust removal assembly, and the exhaust gas washing and dust removal assembly includes a tap water spray device located on the upper part of the exhaust gas washing and dust removal assembly, and a dust and wastewater collection conical groove located at the lower part of the exhaust gas washing and dust removal assembly. The dusty wastewater collection taper tank is connected to the wastewater sedimentation tank through valves and pipes, and the wastewater is discharged into the municipal sewage pipe network after it reaches the standard.

The exhaust gas oxidation absorption area is provided with an exhaust gas oxidation absorption assembly, and the exhaust gas oxidation absorption assembly includes an ozone oxidation water spray device located on the upper part of the exhaust gas oxidation absorption assembly, an ozone oxidation water storage tank located at the lower part of the exhaust gas oxidation absorption assembly and a set The ozone aeration pan in the ozonated water storage tank, the ozone aeration pan is connected to the ozone generator through the aeration tank, and also has the function of pumping the ozonated water in the ozonized water storage tank into the ozonated water spraying device Ozone oxidation water circulation pump.

The exhaust gas alkalization absorption area is provided with an exhaust gas alkalinization absorption component, and the exhaust gas alkalinization absorption component includes an alkaline solution spraying device located on the upper part of the exhaust gas alkalization component, and an alkaline solution spray device located on the lower part of the exhaust gas alkalinization absorption component. A water storage tank and an alkaline solution circulation pump for pumping the alkaline solution in the alkaline solution water storage tank into the alkaline solution spraying device.

The exhaust gas acidification absorption area is provided with an exhaust gas acidification absorption assembly, and the exhaust gas acidification absorption assembly includes an acid solution spray device located on the upper part of the exhaust gas oxidation assembly, an acid solution water storage tank located at the lower part of the exhaust gas acidification absorption assembly, and an acid solution storage tank. The acidic solution in the tank is pumped into the acidic solution circulating pump of the acidic solution spraying device.

A first mist eliminator is provided between the exhaust gas alkalization absorption assembly and the exhaust gas acidification absorption assembly, and a second mist eliminator is provided between the exhaust gas acidification absorption assembly and the exhaust gas outlet. The demister collects the large liquid droplets in the flue gas and returns them to reduce the moisture in the flue gas. Its working principle is that the flue gas enters the mist eliminator, passes through a series of bends, and is discharged from the top. Due to the effect of its mass and kinetic energy, the water droplet falls in a straight line when passing through the curve, collides with the surface of the demister, and bounces back under the action of gravity.

In order to facilitate equipment maintenance and equipment rotation, the exhaust gas purifier has two sets that are set up in parallel as backup or work at the same time. The exhaust gas inlets of the two sets of exhaust gas purifiers are connected to the exhaust gas collection and delivery system through pipelines and valves. The exhaust gas inlet of the purifier is connected to the exhaust cylinder through pipelines and valves. The switch can be realized through the valve, and when the amount of exhaust gas is large, the two sets of equipment can also be operated at the same time.

Specifically, the middle of the exhaust gas purifier is cylindrical, and the upper and lower ends are conical containers. The tank body of the exhaust gas purifier is provided with an observation port and a maintenance and replacement port. The volume can be determined according to the amount of gas to be treated, and it can be placed vertically.

Further matched with the cylindrical container, the ozonated water storage tank, alkaline solution storage tank and acidic solution storage tank are in the shape of a circular basin, and the ozone oxidation water storage tank, alkaline solution storage tank and acidic solution storage tank are above the All are equipped with a spray water gathering device, and the diameter of the lower end of the spray water gathering device is smaller than the diameters of the ozone oxidation water storage tank, the alkaline solution storage tank and the acid solution storage tank. The spray water gathering device can make the spray water gather and flow back to the ozone oxidation water storage tank, the alkaline solution storage tank and the acidic solution storage tank.

Further, in order to supplement the absorption solution in time, the waste gas alkalization absorption assembly also includes an alkali adding device, and the alkali adding device includes a lye tank and a stirring device, and the lye tank is connected to the alkaline solution through pipelines and valves to circulate Pump; the exhaust gas acidification component also includes an acid adding device, the acid adding device includes an acid liquid tank and a stirring device, and the acid liquid tank is connected to the acid solution circulation pump through a pipeline and a valve. The ratio concentration of the absorption solution is determined according to the amount of waste gas to be treated and the concentration of waste gas.

Further, the ozonated water spraying device, the alkaline solution spraying device and the acidic solution spraying device are spiral spraying devices. The sprayed water is in the form of mist, and the water mist intersects and merges without leaving any dead angle, which is conducive to expanding the contact area between the exhaust gas and the solution, and improving the absorption rate and absorption effect.

The alkaline solution used in the waste gas alkalization absorption component is sodium hydroxide solution or lime water, and the acid solution used in the waste gas acidification absorption component is sulfuric acid or hydrochloric acid.

As a further preferred device, the ozone generator is an intermediate frequency ozone generator. It can generate ozone with a concentration of more than 10mg/L, and consumes less power, occupies a small area, and can realize automatic control.

As a further preferred device, the mist eliminator is a baffle plate mist eliminator or a swirl plate mist eliminator.

Further, a heat exchanger is used to heat the purified waste gas with industrial waste heat, so as to increase the diffusion capacity of the purified waste gas and reduce the appearance of visible smoke.

The beneficial effect of the present invention is that the waste gas treatment system device of the present invention has a simple structure and is easy to manufacture. Firstly, after washing and dust removal and ozone oxidation, it enters the waste gas alkalization absorption component, and after being dehumidified by the demister, enters the waste gas acidification absorption component, and then After being dehumidified by the demister, it is heated and discharged, which can effectively treat various organic and inorganic waste gases, various acidic and alkaline waste gases; it can effectively purify high-concentration dust waste gas, and solve waste gas sources such as factory workshops, garbage stations, sewage biochemical aeration tanks, etc. The problem of exhaust pollution.

Description of drawings

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

Fig. 1 is the structural block diagram of the embodiment of the waste gas treatment system device of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the exhaust gas purifier in an embodiment of the present invention;

Fig. 3 is the flowchart of the embodiment of the present invention;

In the figure: 1. Exhaust gas purifier, 10. Exhaust gas washing and dust removal area, 11. Exhaust gas oxidation absorption area, 12. Exhaust gas alkalization absorption area, 13. Exhaust gas acidification absorption area, 14. Exhaust gas inlet, 15. Gas diversion triangular cone , 16. Exhaust gas outlet, 1-1. Tap water spray device, 1-2. Dust waste water collection cone tank, 2-1. Ozone oxidation water spray device, 2-2. Ozone oxidation water storage tank, 2-3 .Ozone oxidation water circulation pump, 2-4. Ozone aeration pan, 2-5. Ozone generator, 3-1. Alkaline solution spray device, 3-2. Alkaline solution water storage tank, 3-3. Alkaline Solution circulating pump, 3-4. Alkali adding device, 4-1. Acidic solution spraying device, 4-2. Acidic solution water storage tank, 4-3. Acidic solution circulating pump, 4-4. Acid adding device, 17. First demister, 18. Second demister, 19. Spray water gathering device.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

The embodiment of the exhaust gas treatment system device of the present invention as shown in Figures 1 to 3 includes an exhaust gas purifier 1 and an exhaust gas collection and delivery system for inputting and outputting exhaust gas to the exhaust gas purifier 1. Exhaust gas washing and dust removal area 10, exhaust gas oxidation absorption area 11, exhaust gas alkalization absorption area 12 and exhaust gas acidification absorption area 13, exhaust gas washing and dust removal area 10 is provided with exhaust gas inlet 14, and exhaust gas inlet 14 is connected to the exhaust gas collection and transportation system through pipelines, exhaust gas purification The top of the device 1 is provided with a waste gas outlet 16, and the waste gas outlet 16 is connected to the heat exchanger through a pipeline, and the heated waste gas is discharged through the exhaust pipe.

The exhaust gas washing and dust removal area 10 is provided with an exhaust gas washing and dust removal assembly, and the exhaust gas washing and dust removal assembly includes a tap water spray device 1-1 located at the upper part of the exhaust gas washing and dust removal assembly, and a dust and wastewater collecting water located at the lower part of the exhaust gas washing and dust removal assembly. Conical tank 1-2, dusty wastewater collection The conical tank 1-2 is connected to the wastewater sedimentation tank through valves and pipes, and the wastewater is discharged into the municipal sewage pipe network after the wastewater is treated up to the standard.

The exhaust gas oxidation absorption area 11 is provided with an exhaust gas oxidation absorption assembly, the exhaust gas oxidation absorption assembly includes an ozone oxidation water spray device 2-1 located at the upper part of the exhaust gas oxidation absorption area 11, and an ozone oxidation water storage tank 2 located at the lower part of the exhaust gas oxidation absorption area 11 -2 and the ozone aeration pan 2-4 placed in the ozonated water storage tank 2-2, the ozone aeration pan 2-4 communicates with the ozone generator 2-5 through the aeration tank, and also has the ozonated water storage tank The ozonated water in 2-2 is pumped into the ozonated water circulating pump 2-3 of the ozonized water spraying device 2-1, and the ozonator 2-5 is an intermediate frequency ozonator; the solution is consumed in the ozonated water storage tank 2-2 When, the solution can be replenished automatically, and the clear water needs to be replaced when the solution chroma in the ozonated water storage tank 2-2 becomes darker or when the turbidity is higher.

The exhaust gas alkalization absorption area 12 is equipped with an exhaust gas alkalization absorption assembly, which includes an alkaline solution spray device 3-1 located at the upper part of the exhaust gas alkalization absorption area 12, and an alkaline spray device 3-1 located at the lower part of the exhaust gas alkalization absorption area 12. Solution water storage tank 3-2 and the alkaline solution circulation pump 3-3 that pumps the alkaline solution in the alkaline solution water storage tank 3-2 into the alkaline solution spraying device 3-1, and the waste gas alkalization absorption component also includes adding The alkali device 3-4, the alkali adding device 3-4 comprises an lye tank and a stirring device, and the lye tank is connected to the alkaline solution circulating pump 3-3 through a pipeline and a valve.

The exhaust gas acidification absorption area 13 is provided with an exhaust gas acidification absorption assembly, and the exhaust gas acidification absorption assembly includes an acid solution spray device 4-1 located at the upper part of the exhaust gas acidification absorption area 13, an acid solution water storage tank 4-2 located at the lower part of the exhaust gas acidification absorption area 13 and Pump the acidic solution in the acidic solution storage tank 4-2 into the acidic solution circulating pump 4-3 of the acidic solution spraying device 4-1, the exhaust gas acidification component also includes an acid adding device 4-4, which includes An acid tank and a stirring device, the acid tank is connected to the acid solution circulation pump 4-3 through pipelines and valves.

A baffle type first mist eliminator 17 is provided between the waste gas alkalization absorption area 12 and the waste gas acidification absorption area 13 , and a baffle type second demister 18 is provided between the waste gas acidification absorption area 13 and the waste gas outlet 16 .

The middle of the waste gas purifier 1 is cylindrical, and the top and bottom are conical containers. The tank body of the waste gas purifier 1 is provided with an observation port and a maintenance and replacement port. Ozone oxidation water storage tank 2-2, alkaline solution storage tank 3-2 and acidic solution storage tank 4-2 are round basin shape, and ozone oxidation water storage tank 2-2, alkaline solution storage tank 3-2 and acidic solution Water storage tank 4-2 top is all provided with spray water gathering device 19, and the lower end diameter of spray water gathering device 19 is less than ozone oxidation water storage tank 2-2, alkaline solution water storage tank 3-2 and acidic solution water storage tank 4- 2 in diameter.

The ozonated water spraying device 2-1, the alkaline solution spraying device 3-1 and the acidic solution spraying device 4-1 are spiral spraying devices.

The alkaline solution used in the waste gas alkalization absorption component is sodium hydroxide solution or lime water, and the acid solution used in the waste gas acidification absorption component is sulfuric acid or hydrochloric acid.

Exhaust gas generated by exhaust gas sources such as workshops is collected by the exhaust gas collection and conveying system and enters the exhaust gas purifier 1 through the exhaust gas inlet 14. Due to the action of the gas diversion triangle cone 15, the exhaust gas is scattered and evenly distributed, and the tap water flows from the evenly distributed spraying device 1-1. It is sprayed out to wash and remove dust from the waste gas. Particles in the waste gas are intercepted and absorbed and fall into the lower part of the dust waste water collection cone tank 1-2, and enter the waste water sedimentation tank through valves and pipes. After the waste water is treated up to the standard, it is discharged into the municipal sewage pipe network. The exhaust gas rises into the oxidation absorption zone 11, and the ozonated water is sprayed from the evenly distributed ozonated water spraying device 2-1 to form countless fine mist droplets, which will undergo a chemical reaction after being fully mixed with the exhaust gas, and the harmful substances in the exhaust gas will be eliminated. It is oxidized into small molecular substances that are easy to absorb and adsorb, and part of it is absorbed in ozone-oxidized water. The exhaust gas continues to rise and contacts the alkaline solution sprayed by the alkaline solution spraying device 3-1, the acidic substances in the exhaust gas react with the alkaline substances, and the reaction products flow into the lower alkaline solution water storage tank 3-2 along with the alkaline solution , and then enter the first demister 17, where the droplets in the exhaust gas are intercepted; the exhaust gas continues to rise and contacts the acidic solution sprayed by the acid solution spraying device 4-1, and the alkaline substances in the exhaust gas react with the acid reaction, the reaction product flows into the lower acid solution water storage tank 4-2 along with the acid solution, and then enters the second demister 18, where the liquid droplets in the exhaust gas are intercepted, so that the exhaust gas is processed into a clean gas, which is realized after heating. Discharge.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (5)

1. an emission-control equipment, comprise catalytic converter (1) and to the gas sampling exhaust system of catalytic converter (1) input and output waste gas, it is characterized in that: in described catalytic converter (1), from bottom, be upwards followed successively by waste gas cleaning dust district (10), off-gas oxidizing uptake zone (11), waste gas alkalization uptake zone (12) and gas acidized uptake zone (13), waste gas cleaning dust district (10) is provided with exhaust gas inlet (14), exhaust gas inlet (14) is by pipeline connection gas sampling induction system, catalytic converter (1) top is provided with waste gas outlet (16), waste gas outlet (16) connects heat exchanger by pipeline, waste gas after heating discharges by aiutage,

In described waste gas cleaning dust district (10), be provided with waste gas cleaning dust assembly, described waste gas cleaning dust assembly comprises and is positioned at the running water spray equipment (1-1) on waste gas cleaning dust assembly top, the dust waste water that the is positioned at waste gas cleaning dust assembly bottom cone tank (1-2) that catchments;

In described off-gas oxidizing uptake zone (11), be provided with off-gas oxidizing absorbent assembly, described off-gas oxidizing absorbent assembly comprises the ozone oxidation water spray system (2-1) that is positioned at top, off-gas oxidizing uptake zone (11), be arranged in the ozone oxidation water aqua storage tank (2-2) of bottom, off-gas oxidizing uptake zone (11) and be placed in the ozonation aerated dish (2-4) of ozone oxidation water aqua storage tank (2-2), described ozonation aerated dish (2-4) is communicated with ozone generator (2-5) by aeration tank, also there is the ozone oxidation water-circulating pump (2-3) that the ozone oxidation water in ozone oxidation water aqua storage tank (2-2) is pumped into ozone oxidation water spray system (2-1),

Described waste gas alkalization uptake zone (12) is provided with waste gas alkalization absorbent assembly, described waste gas alkalization absorbent assembly comprise be arranged in waste gas alkalization top, uptake zone (12) alkaline solution spray equipment (3-1), be positioned at the alkaline solution aqua storage tank (3-2) of waste gas alkalization bottom, uptake zone (12) and the alkaline solution of alkaline solution aqua storage tank (3-2) pumped into the alkaline solution circulating pump (3-3) of alkaline solution spray equipment (3-1);

Described gas acidized uptake zone (13) is provided with gas acidized absorbent assembly, described gas acidized absorbent assembly comprise be arranged in top, gas acidized uptake zone (13) acid solution spray equipment (4-1), be positioned at the acid solution aqua storage tank (4-2) of bottom, gas acidized uptake zone (13) and the acid solution of acid solution aqua storage tank (4-2) pumped into the acid solution circulating pump (4-3) of acid solution spray equipment (4-1);

Between described waste gas alkalization uptake zone (12) and gas acidized uptake zone (13), be provided with baffle plate type the first demister (17), between gas acidized uptake zone (13) and waste gas outlet (16), be provided with baffle plate type the second demister (18);

Described ozone oxidation water aqua storage tank (2-2), alkaline solution aqua storage tank (3-2) and acid solution aqua storage tank (4-2) are circle basin shape, ozone oxidation water aqua storage tank (2-2), alkaline solution aqua storage tank (3-2) and acid solution aqua storage tank (4-2) top are equipped with shower water aggregation apparatus (19), and the lower end diameter of shower water aggregation apparatus (19) is less than the diameter of ozone oxidation water aqua storage tank (2-2), alkaline solution aqua storage tank (3-2) and acid solution aqua storage tank (4-2).

2. emission-control equipment as claimed in claim 1, it is characterized in that: described catalytic converter (1) has and is arranged in parallel standby or two covers of simultaneously working each other, the exhaust gas inlet (14) of two cover catalytic converters (1) is all communicated with gas sampling induction system by pipeline and valve, and the waste gas outlet (16) of two cover catalytic converters (1) is all connected heat exchanger and aiutage with valve by pipeline.

3. the emission-control equipment as described in claim 1,2, is characterized in that: in the middle of described catalytic converter (1), for cylindrical, upper and lower two ends are toot, offer observation port and maintenance replacement port on the tank body of catalytic converter (1).

4. emission-control equipment as claimed in claim 1, is characterized in that: the described dust waste water cone tank (1-2) that catchments is connected effluent settling chamber by valve with pipeline, after wastewater treatment is up to standard, enters municipal wastewater pipe network.

5. emission-control equipment as claimed in claim 1, is characterized in that: described the first demister (17) and the second demister (18) are deflection plate demister or overflowing board demister.

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