WO2016188208A1

WO2016188208A1 - Safe and reliable cyclic washing type waste gas treatment system

Info

Publication number: WO2016188208A1
Application number: PCT/CN2016/077063
Authority: WO
Inventors: 韦建敏; 赵兴文; 张晓蓓; 张小波
Original assignee: 成都虹华环保科技股份有限公司
Priority date: 2015-05-27
Filing date: 2016-03-23
Publication date: 2016-12-01

Abstract

A cyclic washing type waste gas treatment system, comprising an upper computer, a plurality of PLC control cabinets and a plurality of waste gas treatment devices. The upper computer is connected to the PLC control cabinets. The PLC control cabinets are connected to the waste gas treatment devices. Each waste gas treatment device comprises a pre-filter assembly, a washing assembly, an induced draft fan and an exhaust assembly, wherein the pre-filter assembly, the washing assembly, the induced draft fan and the exhaust assembly are sequentially connected by means of a pipeline; the exhaust assembly comprises a sensor for detecting gas content, a control unit for a gating outlet and opening and closing units for two outlets; the sensor is disposed at an inlet of the exhaust assembly; an output end of the sensor is connected to the control unit; and the control unit is connected to the opening and closing units. The system can remotely control a plurality of organic waste gas treatment devices, thereby improving the efficiency.

Description

A safe and reliable circulating water-washing exhaust gas treatment system

[0001] The present invention relates to a safe and reliable circulating water-washing exhaust gas treatment system.

Background technique

[0002] Exhaust gas purification mainly refers to the work of industrial waste gas generated in industrial places such as dust particles, smoke, dust, odorous gas, toxic and harmful gases, common exhaust gas purification, factory dust and exhaust gas purification, workshop dust exhaust gas purification, organic Exhaust gas purification, exhaust gas odor purification, acid and alkali exhaust gas purification, chemical waste gas purification, etc., the currently commonly used exhaust gas treatment device is an exhaust gas treatment tower.

[0003] The water absorption method is a commonly used exhaust gas treatment method, and the method uses the device to be simple, low in use cost, and suitable for treating gaseous and liquid pollutants. The conventional water absorption method generally adopts a horizontal type, and a labyrinth baffle is arranged inside the device to make the exhaust gas meander, and a spray device is arranged above the labyrinth to spray the exhaust gas, and then the water separator is disposed at the end. This type of equipment has a large internal space. In order to ensure the water mist effect, many cone nozzles must be arranged. Due to the large number of nozzles, a circulating pump with a large power is required, which consumes a high amount of energy; Small, very easy to block, resulting in heavy maintenance work; this type of device has high air resistance, and must choose a higher pressure fan, so the general fan power is larger, the cost is higher; because the water and gas contact surface is smaller, the treatment effect is better Poor; the equipment covers a large area, the cost is high, and the amount of wastewater generated is large.

technical problem

[0004] The object of the present invention is to overcome the deficiencies of the prior art and to provide a safe and reliable circulating water-washing waste gas treatment system.

Problem solution

Technical solution

[0005] The object of the present invention is achieved by the following technical solutions: A safe and reliable circulating water-washing exhaust gas treatment system, comprising a host computer, a plurality of PLC control cabinets and a plurality of exhaust gas treatment devices; The upper computer is connected with the PLC control cabinet, and the PLC control cabinet is connected with the exhaust gas treatment device;

[0006] The exhaust gas treatment device includes a pre-filtration assembly, a water washing assembly, an induced draft fan, and an exhaust assembly; The pre-filter assembly, the water washing assembly, the induced draft fan and the exhaust assembly are sequentially connected by a pipe, the exhaust assembly includes two outlets, one of which is for discharging gas, and the other is connected to the pre-filter assembly; An air replenishing valve is disposed between the filter assembly and the water washing component;

[0007] The pre-filter assembly includes a filter housing and a plurality of filter plates disposed in parallel inside the filter housing; the inner wall of the filter housing is provided with a slot for use with the filter plate; the filter plate includes installation a frame, a filter plate disposed inside the mounting frame, and a filter disposed on both sides of the filter plate; the filter plate is installed inside the filter housing through the slot;

[0008] The water washing assembly includes a water washing casing, an air inlet, an air outlet, an air outlet rotor, a water spray nozzle, a circulating water tank, a circulating water pump, a recovery funnel, and a water pipe; the bottom side of the water washing casing is provided with an air inlet The top of the washing shell is provided with an air outlet, and the air outlet flap is arranged at the bottom of the air outlet; the recycling funnel is arranged at the bottom of the water washing shell, and the recycling funnel is connected with the circulating water tank, and the circulating water tank is connected with the water spray nozzle through the circulating water pump and the water pipe;

[0009] The exhaust assembly includes a sensor for detecting a gas content, a control unit for a gate outlet, and a shutoff unit for two outlets; the sensor is disposed at an inlet of the exhaust assembly, and an output end of the sensor Connected to the control unit, the control unit is connected to the shut-off unit.

[0010] The control unit comprises a comparator and an outlet gate, the first input of the comparator is connected to the sensor, and the input of the second input of the comparator is a threshold of the detected gas, and the output of the comparator The end is connected to the outlet selector, and the outlet gate controls the closing of the closing unit according to the high and low levels of the comparator output; the closing unit comprises a first closing unit and a second closing unit, the first closing unit The unit receives a low level hiccup, receives a high level turn-off, and the second closed unit receives a low level turn-off and receives a high level hiccup.

[0011] The air outlet, the air outlet vane, the water spray nozzle and the recovery funnel are distributed from top to bottom along the axis of the water washing casing; the axis of the air inlet is perpendicular to the axis of the water washing casing.

[0012] The water pipe is provided with a control valve for controlling the flow of water.

[0013] The water washing assembly further includes a plurality of filter nets, and the filter net is disposed inside the circulating water tank.

[0014] The exhaust gas treatment device further includes at least one photocatalytic component, the photocatalytic component being disposed between the water washing component and the induced draft fan;

[0015] The photocatalytic assembly includes a photocatalytic housing and a plurality of ultraviolet lamps disposed inside the photocatalytic housing The interval between the ultraviolet lamps and the interval between the ultraviolet tubes and the casing, the installation direction of the ultraviolet lamps is parallel to the direction of the air flow; the inner wall of the photocatalytic casing is provided with a titanium dioxide coating.

[0016] The filter plate is an activated carbon fiber filter plate.

[0017] The filter housing of the pre-filter assembly is provided with a first door body for convenient warranty, and the first door body is provided with a handle.

[0018] The photocatalytic assembly is further provided with a second door body with an observation window, and the second door body is provided with a handle.

[0019] The water spray nozzle is a spiral large diameter nozzle.

Advantageous effects of the invention

Beneficial effect

[0020] The beneficial effects of the invention are as follows: (1) The PLC control cabinet is controlled by the upper computer, and the organic waste gas treatment device is remotely controlled by the PLC control cabinet, which is safe and reliable, that is, the plurality of organic waste gas treatment devices can be remotely controlled. (2) The water-washing component of the invention has no airflow inside, no obvious obstruction, less air resistance, and a smaller power induced draft fan can be selected, thereby achieving the effect of saving resources and cost;

(3) Adopt large-caliber nozzles, which should not be blocked, and reduce the amount of post-maintenance work; (4) Replenishing the water-washing exhaust gas treatment device through the photocatalytic assembly, so that the exhaust gas treatment effect is better; the structure of the photocatalytic assembly is convenient for the ultraviolet lamp Cleaning of dust and oil on the surface of the pipe to ensure ultraviolet transmittance and irradiation intensity;

(5) Effectively remove organic particles and improve the degradation rate of organic waste gas through pre-filter components and multi-layer activated carbon filter plate structure; (6) It has the characteristics of stable and reliable operation, low operating cost and convenient maintenance; (7) Adopting cycle detection function When the exhaust emission does not reach the standard, the circulation is further improved to improve the quality of the exhaust gas; (8) When the circulation is too long, the host computer can send the staff to the pre-filter component and wash it after receiving this information. The components or photocatalytic components are inspected to avoid damage to the device due to excessive use of the turns, resulting in inefficient exhaust gas treatment between long turns.

Brief description of the drawing

DRAWINGS

1 is a block diagram showing the structure of the present invention;

2 is a schematic structural view of an exhaust gas treatment device; 3 is a schematic structural view of an exhaust unit circuit.

Embodiments of the invention

[0024] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings: As shown in FIG. 1, a safe and reliable circulating water-washing exhaust gas treatment system includes a host computer, a plurality of PLC control cabinets and a plurality of exhaust gases. Processing device; the upper computer is connected with a PLC control cabinet, and the PLC control cabinet is connected with an exhaust gas treatment device;

[0025] As shown in FIG. 2, the exhaust gas treatment device includes a pre-filter assembly, a water washing assembly, an induced draft fan, and an exhaust assembly; the pre-filter assembly, the water washing assembly, the induced draft fan, and the exhaust assembly are sequentially connected through a pipeline. The exhaust assembly includes two outlets, one of which is for discharging gas, and the other of which is connected to the pre-filter assembly; an air replenishing valve is disposed between the pre-filter assembly and the water-washing assembly;

[0026] The pre-filter assembly includes a filter housing and a plurality of filter plates disposed in parallel inside the filter housing; the inner wall of the filter housing is provided with a slot for use with the filter plate; the filter plate includes installation a frame, a filter plate disposed inside the mounting frame, and a filter disposed on both sides of the filter plate; the filter plate is installed inside the filter housing through the slot;

[0027] The water washing assembly comprises a water washing shell, an air inlet, an air outlet, an air outlet rotor, a water spray nozzle, a circulating water tank, a circulating water pump, a recycling funnel and a water pipe; the bottom side of the water washing shell is provided with an air inlet The top of the washing shell is provided with an air outlet, and the air outlet flap is arranged at the bottom of the air outlet; the recycling funnel is arranged at the bottom of the water washing shell, and the recycling funnel is connected with the circulating water tank, and the circulating water tank is connected with the water spray nozzle through the circulating water pump and the water pipe;

[0028] As shown in FIG. 3, the exhaust assembly includes a sensor for detecting a gas content, a control unit for a gate outlet, and a shutoff unit for two outlets; the sensor is disposed at an inlet of the exhaust assembly Wherein, the output of the sensor is connected to the control unit, and the control unit is connected to the shut-off unit.

[0029] The control unit includes a comparator and an outlet gate, the first input of the comparator is connected to the sensor, and the input of the second input of the comparator is a threshold of the detected gas, and the output of the comparator The end is connected to the outlet selector, and the outlet gate controls the closing of the closing unit according to the high and low levels of the comparator output; the closing unit comprises a first closing unit and a second closing unit, the first closing unit The unit receives a low level hiccup, receives a high level turn-off, and the second closed unit receives a low level turn-off and receives a high level hiccup. [0030] The air outlet, the air outlet vane, the water spray nozzle and the recovery funnel are distributed from top to bottom along the axis of the water washing casing; the axis of the air inlet is perpendicular to the axis of the water washing casing.

[0031] The water pipe is provided with a control valve for controlling the flow of water.

[0032] The water washing assembly further includes a plurality of filter nets, and the filter net is disposed inside the circulating water tank.

[0033] The exhaust gas treatment device further includes at least one photocatalytic component, the photocatalytic component being disposed between the water washing component and the induced draft fan;

[0034] The photocatalytic assembly includes a photocatalytic housing and a plurality of ultraviolet tubes disposed inside the photocatalytic housing; the spacing between the ultraviolet tubes and the spacing between the ultraviolet tubes and the housing are the same, The installation direction of the ultraviolet lamp tube is parallel to the air flow direction; the inner wall of the photocatalytic outer casing is provided with a titanium dioxide coating.

[0035] The filter plate is an activated carbon fiber filter plate.

[0036] The filter housing of the pre-filter assembly is provided with a first door body for convenient warranty, and the first door body is provided with a handle.

[0037] The photocatalytic assembly is further provided with a second door body with an observation window, and the second door body is provided with a handle.

[0038] The water spray nozzle is a spiral large diameter nozzle.

[0039] After the hydrazine is used, the exhaust gas to be treated passes through the pre-treatment component, enters the air inlet, and enters the water-washing casing due to the thrust of the exhaust gas itself, and the exhaust gas is fully mixed with water under the action of the water spray nozzle and then swirled through the air outlet port. The air outlet is sent out, and the water flows through the recovery funnel into the circulating water tank, and is reused under the action of the circulating water pump to achieve the effect of cleaning the exhaust gas and reducing the energy consumption. After that, it enters the photocatalytic module, and after being subjected to high-energy ultraviolet photocatalytic oxidation treatment, it is detected by the sensor. If the result of the test is qualified, it is discharged from the induced draft fan of the negative pressure to the discharge of 15 meters, or the pre-filter component is returned. cycle. The PLC control cabinet controls the operation of the organic exhaust gas treatment unit. The PLC control cabinet controls the operation of the organic exhaust gas treatment device. The host computer monitors the status of the PLC control cabinet. When the circulation time is too long, the host computer can send the staff to check the pre-filter component or the photocatalytic component after receiving this information, so as to avoid the damage of the device caused by the excessive use of the turn-up period. Exhaust gas treatment.

Claims

Claim

[Claim 1] A safe and reliable circulating water-washing exhaust gas treatment system, comprising: a host computer, a plurality of PLC control cabinets and a plurality of exhaust gas treatment devices; said upper computer and PL C control cabinet Connecting, the PLC control cabinet is connected to the exhaust gas treatment device; the exhaust gas treatment device comprises a pre-filter assembly, a water washing assembly, an induced draft fan and an exhaust assembly; the pre-filter assembly, the water washing assembly, the induced draft fan and the exhaust assembly pass through the pipeline Connected in sequence, the exhaust assembly includes two outlets, one of which is for discharging gas, and the other is connected to the pre-filter assembly; an air replenishing valve is disposed between the pre-filter assembly and the water washing assembly;

The pre-filter assembly includes a filter housing and a plurality of filter plates disposed in parallel inside the filter housing; the inner wall of the filter housing is provided with a slot for use with the filter plate; the filter plate includes a mounting frame and a setting a filter plate inside the frame and a filter disposed on both sides of the filter plate; the filter plate is installed inside the filter housing through a slot; the water washing component includes a water washing shell, an air inlet, an air outlet, and an air outlet leaf , a water spray nozzle, a circulating water tank, a circulating water pump, a recovery funnel and a water pipe; the bottom side of the water washing casing is provided with an air inlet, the top of the water washing casing is provided with an air outlet, and the air outlet nozzle is disposed at the bottom of the air outlet; It is disposed at the bottom of the water-washed casing, and the recycling funnel is connected with the circulating water tank, and the circulating water tank is connected to the water spray nozzle through the circulating water pump and the water pipe;

The exhaust assembly includes a sensor for detecting a gas content, a control unit for strobing the outlet, and a shut-off unit for two outlets; the sensor is disposed at an inlet of the exhaust assembly, and the output end of the sensor and the control unit Connected, the control unit is connected to the shut-off unit.

[Claim 2] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 1, wherein: said control unit comprises a comparator and an outlet gate, the first of the comparator The input end is connected to the sensor, the second input end of the comparator is a threshold value of the detection gas, the output end of the comparator is connected to the outlet selector, and the outlet gate is controlled according to the high and low level of the comparator output. The closing unit includes a first closing unit and a second closing unit, the first closing unit receiving a low level hiccup, receiving a high level shutdown, and the second closing unit receiving a low power Closed, received a high level of snoring

[Claim 3] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 1, wherein: the air outlet, the air outlet rotor, the water spray nozzle and the recovery funnel are along the axis of the water washing casing Distributed from top to bottom; the axis of the inlet is perpendicular to the axis of the washed casing.

[Claim 4] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 1, wherein: the water pipe is provided with a control valve for controlling the flow of water.

[Claim 5] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 1, wherein: the water washing component further comprises a plurality of filter nets, and the filter net is disposed in a circulation Inside the water tank.

[Claim 6] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 1, wherein: said exhaust gas treatment device further comprises at least one photocatalytic component, said photocatalytic component setting Between the water washing component and the bow I fan;

The photocatalytic assembly comprises a photocatalytic housing and a plurality of ultraviolet tubes disposed inside the photocatalytic housing; the spacing between the ultraviolet tubes and the spacing between the ultraviolet tubes and the housing, the ultraviolet tubes The mounting direction is parallel to the airflow direction; the inner wall of the photocatalytic outer casing is provided with a titanium dioxide coating.

[Claim 7] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 1, wherein: the filter plate is an activated carbon fiber filter plate.

[Claim 8] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 1, wherein: the filter housing of the pre-filter assembly is provided with a first door body for convenient warranty, The first door body is provided with a handle.

[Claim 9] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 6, wherein: the photocatalytic module is further provided with a second door body having an observation window, The second door body is provided with a handle.

[Claim 10] A safe and reliable circulating water-washing exhaust gas treatment system according to claim 1, wherein the water spray nozzle is a spiral large-diameter nozzle.