阅读说明：本技术 一种废气净化系统 (Waste gas purification system ) 是由 谭旭能 于 2018-08-16 设计创作，主要内容包括：本发明涉及一种废气净化系统,沿气流移动方向依次包括集气罩、除尘设备、碱性喷淋塔、活性炭吸附装置和排气烟囱；并通过排气管道依次连接；在所述集气罩与所述除尘设备之间设置有第一风机和气体流量控制阀；所述活性炭吸附装置和排气烟囱之间设置有气体检测传感器、第二风机和气体回流管道,所述气体回流管道的进气端连通在所述第二风机和排气烟囱之间的排气管道上,所述气体回流管道的出气端连通在所述碱性喷淋塔的进气口处。本发明的带有自检装置的废气净化系统通过集气罩收集废气,再通过组合工艺去除废气中的颗粒物、粉尘、酸性气体和有机气体,再通过气体检测传感器自动检测处理后的气体是否达标,确保废气的排放达到环保要求。(The invention relates to a waste gas purification system, which sequentially comprises a gas collecting hood, a dust removing device, an alkaline spray tower, an active carbon adsorption device and an exhaust chimney along the moving direction of an air flow; and are connected in sequence through an exhaust pipeline; a first fan and a gas flow control valve are arranged between the gas collecting hood and the dust removing equipment; be provided with gaseous detection sensor, second fan and gas return line between active carbon adsorption device and the exhaust chimney, the inlet end intercommunication of gas return line is in on the exhaust duct between second fan and the exhaust chimney, the end intercommunication of giving vent to anger of gas return line is in the air inlet department of alkaline spray tower. The waste gas purification system with the self-checking device collects waste gas through the gas collecting hood, removes particulate matters, dust, acid gas and organic gas in the waste gas through a combined process, and automatically detects whether the treated gas reaches the standard through the gas detection sensor, so that the emission of the waste gas is ensured to meet the environmental protection requirement.)

1. An exhaust gas purification system characterized in that: the waste gas purification system sequentially comprises a gas collecting hood, a dust removal device, an alkaline spray tower, an active carbon adsorption device and an exhaust chimney along the moving direction of the gas flow; the gas-collecting hood, the dust-removing equipment, the alkaline spray tower, the active carbon adsorption device and the exhaust chimney are all connected in sequence through an exhaust pipeline;

a first fan and a gas flow control valve are arranged between the gas collecting hood and the dust removing equipment;

a gas detection sensor, a second fan and a gas backflow pipeline are arranged between the activated carbon adsorption device and the exhaust chimney, the gas detection sensor is installed in the exhaust pipeline between the activated carbon adsorption device and the second fan, the gas inlet end of the gas backflow pipeline is communicated with the exhaust pipeline between the second fan and the exhaust chimney, and the gas outlet end of the gas backflow pipeline is communicated with the gas inlet of the alkaline spray tower;

the air exhaust device is characterized in that a first electromagnetic valve is installed on the air backflow pipeline, a second electromagnetic valve is installed on the air exhaust pipeline between the second fan and the air exhaust chimney, and an air suction pump is installed on the air backflow pipeline.

2. The exhaust gas purification system according to claim 1, characterized in that: the alkaline spray tower comprises a spray tower body, a main spray pipe, branch spray pipes and a spray head; the spraying main pipe penetrates into the spraying tower body from the outside, and the tail end of the spraying main pipe is connected with the spraying branch pipe; the spraying branch pipes are arranged inside the spraying tower body and are positioned below the air inlet of the spraying tower body; the spray headers are distributed on the spray branch pipes, and the spray faces of the spray headers are upward.

3. An exhaust gas purification combination according to claim 2, wherein: the alkaline spray tower also comprises a washing filler layer, wherein the inside of the washing filler layer is filled with filler, and the filler can be hollow sphere or rosette filler.

4. An exhaust gas purification combination according to claim 3, wherein: the alkaline spray tower also comprises a spray water tank, the spray water tank is positioned below the washing filler layer, the bottom of the spray water tank is provided with a water outlet, and the water outlet is communicated with a spray water pump; and the water outlet end of the spray water pump is communicated with the water inlet of the spray main pipe.

5. An exhaust gas purification combination according to claim 1 or 4, wherein: the first solenoid valve is installed at an inlet end portion of the gas return duct.

6. The exhaust gas purification system according to claim 5, characterized in that: the second electromagnetic valve is installed between the air inlet end of the gas return pipeline and the exhaust chimney.

7. The exhaust gas purification system according to claim 6, characterized in that: the air guide flow dividing pipe is installed at the air inlet of the active carbon adsorption device, and the reducer pipe is installed at the air outlet of the active carbon adsorption device.

8. The exhaust gas purification system according to claim 7, characterized in that: the gas collecting hood is horn-shaped, and the gas collecting hood is hermetically connected with an external waste gas pipeline.

9. The exhaust gas purification system according to claim 8, characterized in that: the first fan is an axial flow fan.

10. The exhaust gas purification system according to claim 9, characterized in that: the second fan is a centrifugal fan.

Technical Field

The invention relates to the field of environmental protection, in particular to a purification system containing organic gas generated by a plastic plant.

Background

The waste gas purification mainly refers to the treatment of industrial waste gas generated in industrial places, such as dust particles, smoke and dust, peculiar smell gas, toxic and harmful gas and the like. Common waste gas purification includes factory smoke waste gas purification, workshop dust waste gas purification, organic waste gas purification, acid-base waste gas purification, chemical waste gas purification, odor deodorization purification and the like.

At present, the rapid development of plastic plants is brought about due to the large use of plastic products, and the problems of waste gas pollution and the like caused by the rapid development of the plastic plants are frequently caused. Plastics factory produces waste gas and mainly contains dust, volatile organic compounds, acid gas etc. because its waste gas produces the condition various, waste gas composition is complicated, and the waste gas composition that often produces different time quantums is all different, causes great influence when giving the processing, leads to exhaust-gas treatment can't reach the effect that needs, is unfavorable for environmental protection.

Disclosure of Invention

The invention aims to overcome the defects and shortcomings in the prior art and provides a purification system containing organic gas generated by a plastic plant.

The invention is realized by the following technical scheme: a waste gas purification system comprises a gas collecting hood, a dust removing device, an alkaline spray tower, an active carbon adsorption device and an exhaust chimney in sequence along the moving direction of air flow; the gas-collecting hood, the dust-removing equipment, the alkaline spray tower, the active carbon adsorption device and the exhaust chimney are all connected in sequence through an exhaust pipeline; a first fan and a gas flow control valve are arranged between the gas collecting hood and the dust removing equipment; a gas detection sensor, a second fan and a gas backflow pipeline are arranged between the activated carbon adsorption device and the exhaust chimney, the gas detection sensor is installed in the exhaust pipeline between the activated carbon adsorption device and the second fan, the gas inlet end of the gas backflow pipeline is communicated with the exhaust pipeline between the second fan and the exhaust chimney, and the gas outlet end of the gas backflow pipeline is communicated with the gas inlet of the alkaline spray tower; the air exhaust device is characterized in that a first electromagnetic valve is installed on the air backflow pipeline, a second electromagnetic valve is installed on the air exhaust pipeline between the second fan and the air exhaust chimney, and an air suction pump is installed on the air backflow pipeline.

Further, the alkaline spray tower comprises a spray tower body, a main spray pipe, branch spray pipes and a spray head; the spraying main pipe penetrates into the spraying tower body from the outside, and the tail end of the spraying main pipe is connected with the spraying branch pipe; the spraying branch pipes are arranged inside the spraying tower body and are positioned below the air inlet of the spraying tower body; the spray headers are distributed on the spray branch pipes, and the spray faces of the spray headers are upward.

Further, the alkaline spray tower also comprises a washing filler layer, wherein the inside of the washing filler layer is filled with a filler, and the filler can be a hollow sphere or a rosette filler.

Further, the alkaline spray tower also comprises a spray water tank, the spray water tank is positioned below the washing filler layer, the bottom of the spray water tank is provided with a water outlet, and the water outlet is communicated with a spray water pump; and the water outlet end of the spray water pump is communicated with the water inlet of the spray main pipe.

Further, the first solenoid valve is installed at an inlet end portion of the gas return duct.

Further, the second electromagnetic valve is installed between the air inlet end of the gas return pipeline and the exhaust chimney.

Further, the air guide shunt tubes are installed at the air inlets of the activated carbon adsorption devices, and the reducer tubes are installed at the air outlets of the activated carbon adsorption devices.

Furthermore, the gas-collecting hood is trumpet-shaped, and the gas-collecting hood is connected with an external waste gas pipeline in a sealing mode.

Further, the first fan is an axial flow fan.

Further, the second fan is a centrifugal fan.

Compared with the prior art, the waste gas purification system with the self-checking device collects waste gas through the gas collecting hood, and then treats particulate matters, dust and the like in the waste gas through the dust removal device; the alkaline spray tower sprays alkaline liquor to adsorb and neutralize acid gas in the waste gas, and the spray surface is arranged to be upward, so that alkaline liquid moves upward first and then moves downward under the action of gravity, the movement track of the alkaline liquid is prolonged, the contact area of the alkaline liquid and the waste gas is enlarged, and the acid gas in the waste gas can be better removed; then adsorbing the organic gas in the waste gas by an activated carbon adsorption device, thereby realizing diversified treatment of the waste gas with complex components in the plastic plant; the treated waste gas is automatically detected whether to reach the standard through a gas detection sensor, if the treated gas reaches the standard, the treated gas is discharged through an exhaust chimney, and if the treated gas does not reach the standard, the treated gas is conveyed into the alkaline spray tower again through a gas backflow pipeline for further treatment, so that the emission of the waste gas is ensured to meet the environmental protection requirement.

In order that the invention may be more clearly understood, specific embodiments thereof will be described hereinafter with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic configuration diagram of an exhaust gas purification system of the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 1, fig. 1 is a schematic structural view of an exhaust gas purification system according to the present invention.

The invention provides a waste gas purification system which sequentially comprises a gas collecting hood 1, a dust removing device 2, an alkaline spray tower 3, an active carbon adsorption device 4 and an exhaust chimney 5 along the moving direction of air flow, wherein the devices are sequentially connected through an exhaust pipeline.

The gas collecting channel 1 is horn-shaped, and the gas collecting channel 1 is hermetically connected with an external waste gas pipeline.

The dust removing device 2 can be used for treating particulate matters, dust and the like in waste gas in one of cyclone dust removal, cloth bag dust removal, centrifugal dust removal and other modes.

The alkaline spray tower 3 comprises a spray tower body 31, a main spray pipe 21, a branch spray pipe 33, a spray header 34, a washing filler layer 34 and a spray water tank 35. The spraying main pipe 32 penetrates from the outside to the inside of the spraying tower body 31, and the tail end of the spraying main pipe 32 is connected with the spraying branch pipe 33; the spray branch pipes 33 are arranged inside the spray tower body 31 and are positioned below the air inlet of the spray tower body 31; the spray headers 34 are distributed on the spray branch pipes 33, the spray surfaces of the spray headers are upward, the spray surfaces are upward, so that the alkaline liquid moves upward first and then moves downward under the action of gravity. The washing filler layer 34 is filled with filler, and the filler can be hollow sphere or rosette filler; the spray water tank 35 is positioned below the washing filler layer 34, and the bottom of the spray water tank is provided with a water outlet which is communicated with the spray water pump 8. And the water outlet end of the spray water pump 8 is communicated with the water inlet of the spray main pipe.

The air inlet of the active carbon adsorption device 4 is provided with an air guide flow dividing pipe, and the air outlet of the active carbon adsorption device 4 is provided with a reducer pipe. Preferably, a rain hat 15 is arranged on the top of the exhaust stack 5.

A first fan 6 and a gas flow control valve 7 are arranged between the gas collecting hood 1 and the dust removing device 2; preferably, the first fan 6 is an axial fan. A gas detection sensor 9, a second fan 10 and a gas return pipeline 14 are arranged between the activated carbon adsorption device 4 and the exhaust chimney 5; preferably, the second fan is a centrifugal fan.

The gas detection sensor 9 is installed in an exhaust pipeline between the activated carbon adsorption device 4 and the second fan 10, the gas inlet end of the gas return pipeline 14 is communicated with the exhaust pipeline between the second fan 10 and the exhaust chimney 5, and the gas outlet end of the gas return pipeline 14 is communicated with the gas inlet of the alkaline spray tower 3; the gas return duct 14 is fitted with a first solenoid valve 11 mounted at the inlet end portion of the gas return duct.

A second electromagnetic valve 12 is installed on an exhaust pipeline between the second fan 10 and the exhaust chimney 5, and specifically, the second electromagnetic valve 12 is installed between an air inlet end of the gas return pipeline 14 and the exhaust chimney 5; and the gas return pipeline is provided with a suction pump 13.

The working principle of the waste gas purification system is as follows:

the waste gas purification system provided by the invention mainly aims at the treatment process of waste gas containing organic gas generated by a plastic plant, and the waste gas G enters the gas collecting hood 1 under the suction action of the first fan 6 and enters the dust removal device 2 through the exhaust pipeline to remove particulate matters, dust and the like in the waste gas; then the alkaline solution enters an alkaline spray tower 3, the alkaline solution is upwards sprayed out from a spray header 34 due to the upward spray surface, the movement track of the alkaline solution firstly upwards and then downwards falls under the action of gravity, the alkaline solution contacts acid gas in waste gas in the whole process, and the alkaline solution and the acid gas are subjected to neutralization reaction to generate neutral salt or precipitate; the alkaline liquid mixed with the salt or the precipitate continuously falls into the washing filler layer 34, the precipitate is filtered onto the washing filler layer 34, the alkaline liquid continuously falls into the spray water tank 35, and then is pumped into the main spray pipe 21 under the action of the spray water pump 8, and the processes are circulated, so that the aim of removing the acid gas in the waste gas is fulfilled; furthermore, the gas flow control valve 7 can be adjusted according to actual requirements to control the flow of the waste gas; and the alkaline liquid in the shower bath 35 is slowly neutralized and evaporated during the circulation, the alkaline liquid in the shower bath 35 needs to be periodically replenished.

The treated waste gas continuously enters the activated carbon adsorption device 4 along the exhaust pipeline under the action of the suction force of the second fan 10, and the activated carbon adsorption device 4 is used for removing organic gas in the waste gas; the waste gas from the outlet of the activated carbon adsorption device 4 passes through the gas detection sensor 9, and can detect whether various pollutants in the waste gas reach the emission standard, if so, the first electromagnetic valve 11 is closed, and the second electromagnetic valve 12 is opened, so that the gas reaching the standard is discharged into the atmospheric environment through the exhaust chimney 5; if not up to standard, then open first solenoid valve 11, close second solenoid valve 12, will not up to standard gas through aspiration pump 13, pump to the entrance of alkaline spray column 3, once more alkaline spray column 3 gets rid of acid gas, active carbon adsorption device 4 gets rid of organic gas to whether rethread gas detection sensor 9 detects up to standard, so circulation can ensure that the waste gas that contains organic gas that the plastics factory produced discharges up to standard, can not cause the pollution to the atmospheric environment.

Compared with the prior art, the waste gas purification system with the self-checking device collects waste gas through the gas collecting hood, and then treats particulate matters, dust and the like in the waste gas through the dust removal device; the alkaline spray tower sprays alkaline liquor to adsorb and neutralize acid gas in the waste gas, and the spray surface is arranged to be upward, so that alkaline liquid moves upward first and then moves downward under the action of gravity, the movement track of the alkaline liquid is prolonged, the contact area of the alkaline liquid and the waste gas is enlarged, and the acid gas in the waste gas can be better removed; then adsorbing the organic gas in the waste gas by an activated carbon adsorption device, thereby realizing diversified treatment of the waste gas with complex components in the plastic plant; the treated waste gas is automatically detected whether to reach the standard through a gas detection sensor, if the treated gas reaches the standard, the treated gas is discharged through an exhaust chimney, and if the treated gas does not reach the standard, the treated gas is conveyed into the alkaline spray tower again through a gas backflow pipeline for further treatment, so that the emission of the waste gas is ensured to meet the environmental protection requirement.

The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.