CN216825480U

CN216825480U - Chromium acid mist-containing environment-friendly purification treatment device

Info

Publication number: CN216825480U
Application number: CN202122578622.0U
Authority: CN
Inventors: 周明君; 周长建
Original assignee: Shanghai Baochen Environmental Technology Co ltd
Current assignee: Shanghai Huachang Intelligent System Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-06-28
Anticipated expiration: 2031-10-26

Abstract

The utility model discloses a chromium acid mist-containing environment-friendly purification treatment device, it relates to exhaust-gas treatment technical field. The device comprises a dry coarse purifier, a wet fine filter, a plurality of exhaust hoods and a fan, wherein the exhaust hoods are arranged in a coating chamber, the exhaust hoods are connected to an inlet of the dry coarse purifier through a pipeline, chromium fog waste gas generated in a raw liquid tank is also connected to the inlet of the dry coarse purifier through a pipeline, an outlet of the dry coarse purifier is connected with an inlet of the wet fine filter, and an outlet of the wet fine filter is connected with the fan. The utility model discloses can carry out efficient purification treatment to the chromic acid fog, purifying effect is good, concentrates the emission, reaches the emission requirement, effective environmental protection and health, and application prospect is wide.

Description

Chromium acid mist-containing environment-friendly purification treatment device

Technical Field

The utility model relates to a waste gas treatment technical field, concretely relates to contain chromium acid fog environmental protection purification unit.

Background

The coating machine is usually arranged in a totally-enclosed coating chamber, and the concentration of chromic acid mist generated in the environment of the coating chamber is less than or equal to 0.025mg/Nm due to the volatilization of chromic acid coating liquid on the surfaces of a roller coating roller and strip steel³pH about 1.5;while the stock solution tank of chromic acid coating solution needs to be stirred during solution preparation, the concentration of the solution is about 1000mg/Nm³The pH of the chromic acid mist is about 1.5, the chromic acid mist not only pollutes the environment, but also seriously harms human health, has harm to human skin and respiratory tract, needs to be purified and treated, and is intensively discharged through environment-friendly purification treatment, so that the special emission limit value of GB28665-2012 'emission Standard of atmospheric pollutants for Steel Rolling industry' is 0.07mg/Nm³The requirements of (2). Based on this, it is especially necessary to design a novel chromium acid mist-containing environment-friendly purification device.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a chromium acid mist-containing environmental protection purification treatment device, simple structure, reasonable in design can concentrate the emission to chromic acid mist purification treatment, and purifying effect is good, environmental protection and health, and the practicality is strong, easily uses widely.

In order to achieve the above purpose, the present invention is realized by the following technical solution: the utility model provides a chromium acid mist containing environmental protection purification unit, includes dry-type coarse purification ware, wet process fine filter, exhaust hood and fan, and the exhaust hood is provided with a plurality ofly, and the exhaust hood is located the coating room, the exhaust hood connect to the import of dry-type coarse purification ware through the pipeline, chromium fog waste gas that produces in the raw liquor jar also connects to the import of dry-type coarse purification ware through the pipeline, the export of dry-type coarse purification ware links to each other with the import of wet process fine filter, the export of wet process fine filter is connected with the fan.

Preferably, the dry type coarse purifier comprises a baffle plate, a filter screen and active carbon, the baffle plate, the filter screen and the active carbon are sequentially arranged from front to back, the baffle plate is used for reducing the air flow velocity entering the purifying box body, and the filter screen and the active carbon are used for treating chromic acid mist.

Preferably, the filter screen is a multilayer diamond-shaped plastic gas-liquid filter screen, the number of the filter screen layers is preferably 10-12, and the filter screen layers are arranged in the outer frame of the filter grid in a criss-cross mode layer by layer, so that high demisting efficiency is guaranteed.

The utility model has the advantages that: the device can carry out efficient purification treatment on the chromic acid mist, has good purification effect, is intensively discharged, meets the discharge requirement, effectively protects the environment and the human health, and has wide application prospect.

Drawings

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments;

FIG. 1 is a schematic diagram of the present invention;

fig. 2 is a schematic structural view of the spray absorption system provided by the present invention.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1-2, the following technical solutions are adopted in the present embodiment: an environment-friendly purification treatment device containing chromium acid mist comprises a dry type coarse purifier 1, a wet type fine filter 2, an exhaust hood 3 and a fan 4, wherein the exhaust hood 3 is provided with a plurality of exhaust hoods 3, the exhaust hoods 3 are positioned in a coating chamber, the exhaust hoods 3 are connected to an inlet of the dry type coarse purifier 1 through pipelines, chromium mist waste gas generated in a raw liquid tank 5 is also connected to an inlet of the dry type coarse purifier 1 through a pipeline, an outlet of the dry type coarse purifier 1 is connected with an inlet of the wet type fine filter 2, and an outlet of the wet type fine filter 2 is connected with the fan 4.

It is worth noting that the dry type coarse purifier 1 comprises a baffle plate, a filter screen and active carbon, the baffle plate, the filter screen and the active carbon are sequentially arranged from front to back, the baffle plate is used for reducing the air velocity entering the purifying box body, the filter screen and the active carbon are used for treating chromic acid mist, and the grid type purifier needs to be washed by clean water according to working conditions to avoid blockage.

In addition, the filter screen is a multilayer diamond-shaped plastic gas-liquid filter screen, the number of the screen layers of the filter screen is preferably 10-12, the filter screen is arranged in the outer frame of the filter grid in a criss-cross mode layer by layer, secondary fog drops are not easy to generate, and high demisting efficiency is guaranteed.

In the embodiment, the chromium fog is removed by the combination of the dry coarse purifier 1 and the wet fine filter 2, because of the dry coarse purificationThe chemical device 1 can ensure that the chromium fog in the coating chamber reaches the environmental-friendly discharge index, the removal rate of the chromium fog is more than or equal to 98 percent, but the concentration of the volatile matter in the raw liquid tank is about 1000mg/Nm³The chromic acid mist purification reaches the standard, so the chromium mist is removed by a wet fine filter 2.

The working principle is as follows: the fan 4 acts, chromium fog waste gas in a coating room and a raw liquid tank is collected through the exhaust hood 3 at the front end, and then the chromium fog waste gas is concentrated to enter the chromium acid fog-containing environment-friendly purification device. Chromium fog waste gas is firstly purified and recovered in a dry type coarse purifier 1 in a dry type, the density of chromic acid fog is high and the chromic acid fog is easy to agglomerate through a grid type purifier, chromic acid fog drops with different grain sizes collide with each other in air flow to form large grains, and after entering a purifying box body, the air flow speed is reduced through a baffle plate and the chromic acid fog waste gas is separated out under the action of gravity. When the chromic acid fog of certain gas velocity passes through the filter screen grid layer, under the effect of inertia effect and interlock effect, the chromic acid fog is attached to the net, constantly adheres to and makes the droplet increase and descend along the net, flows into the hydrops case at last, and this filterable efficiency is relevant with droplet size, gas velocity and gas volume, and through adding a layer of active carbon absorption after the net formula purifies, the chromic acid fog of the assurance handling most. The waste gas purified by the dry type coarse purifier 1 enters the wet type fine filter 2 to remove chromium fog.

In order to ensure that the tail gas reaches the standard, the specific embodiment can also be provided with a spray absorption system (figure 2) after dry purification and recovery, and the spray absorption system sprays the tail gas in a reciprocating manner by a spray circulating pump 6 so as to achieve the purpose of gas washing and purification. An online detection liquid level meter 8 and a pH meter are additionally arranged on a circulating liquid water tank 7 and a pipeline bypass of the washing packed tower, and when the pH value is set to be less than 9, a dosing pneumatic valve and a dosing metering pump are started to replenish liquid into the circulating liquid water tank 7 until the pH value is about 10. When the water supply device normally works, the liquid level is at the position A, if the liquid level is low, the water inlet electric valve 9 starts automatic water supply, the water inlet manual valve 10 is in a normally open state, the water inlet bypass manual valve 11 is in a normally closed state, the water drainage manual valve 12 is in a normally open state, and the water drainage electric valve 13 is in a closed state; when the liquid level is lower than the position B, the spraying circulating pump 6 stops working; and discharging the wastewater in the water tank every 12 hours, starting the water discharging electric valve 13 at the moment, closing the water inlet electric valve 9, reducing the liquid level to a position B, stopping the spraying circulating pump 6, stopping the water discharging electric valve 13 when the liquid level is reduced to a lower limit C, starting the water inlet electric valve 9, automatically supplementing water, and closing the water inlet electric valve 9 when the liquid level reaches a set liquid level A.

The embodiment carries out efficient purification treatment on the chromic acid mist, and the chromic acid mist is intensively discharged through environmental protection purification treatment, so that the special discharge limit value of GB28665-2012 'emission Standard of atmospheric pollutants for Steel Rolling industry' is 0.07mg/Nm³The method protects the environment and human health and has wide market application prospect.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a chromium acid mist containing environmental protection purification unit, its characterized in that includes dry-type coarse purification ware (1), wet process fine filter (2), exhaust hood (3) and fan (4), and exhaust hood (3) are provided with a plurality ofly, and exhaust hood (3) are located the coating room, exhaust hood (3) connect to the import of dry-type coarse purification ware (1) through the pipeline, the import of dry-type coarse purification ware (1) is also connected to through the pipeline to the chromium fog waste gas that produces in raw liquid jar (5), and the export of dry-type coarse purification ware (1) links to each other with the import of wet process fine filter (2), and the export of wet process fine filter (2) is connected with fan (4).

2. The environmental protection purification treatment device containing chromium acid mist according to claim 1, wherein the dry type coarse purifier (1) comprises a baffle plate, a filter screen and active carbon, and the baffle plate, the filter screen and the active carbon are sequentially arranged from front to back.

3. The chromium acid mist-containing environment-friendly purification treatment device as claimed in claim 2, wherein the filter screen is a multi-layer diamond-shaped plastic gas-liquid filter screen.

4. The environmentally friendly chromate solution purification treatment device as claimed in claim 3, wherein the number of the filter screen layers is 10-12, and the filter screen layers are arranged in the outer frame of the filter grid in a criss-cross manner.