The utility model relates to a device for treating waste gas in the process of producing PVC gloves and a method thereof

- Jun 24, 2019-

【 patent abstract 】The invention discloses a kind of PVC gloves production process of waste gas treatment plant and its methods, including adsorption tank, layered slot, rectifying column, it also includes through the exhaust pipe connection device, spray condensation of separator, as described in the exit of the exhaust gas atomization cooling separator with adsorption tank is linked together, atomization cooling separator at the bottom of the solvent mixture of export are connected to the layered slot;The atomized water inlet on the upper part of atomized condensation separator is connected with the stratified groove;The atomizing condensation separator and the waste heat refrigeration device are circularly connected through low-temperature cold water pipeline.The waste gas can recover most of the solvent through the step condensation of atomizing condensation separator, reduce the load of the adsorption system of the activated carbon adsorption tank, reduce environmental pollution, and realize the recycling of heat energy, the recycling of atomized water and desorption water, and the recycling of solvent.

[patent description]

The utility model relates to a device for treating waste gas in the process of producing PVC gloves and a method thereof

Technical field

The invention belongs to the technical field of waste gas treatment, relates to a waste gas treatment device and a method in the process of producing PVC gloves.

Background technology

In the production of PVC gloves, PVC powder by the solvent, plasticizer and other material blend on the production line after high temperature baking, shed a lot of the smell of cooking gas, its main ingredients for the D series solvent, plasticizer, and a small amount of dust, the emissions from above 120 ° c, usually cause serious atmospheric pollution discharge atmospheric directly, affect the worker and production and living of the residents.

At present most of the factories are collected by the gas collection system after electrostatic adsorption removal after simple condensation, the traditional treatment method is usually the first direct will exhaust cooling in the 120 ° C to 70 ° C degrees or so, again through the electrostatic oil mist in the exhaust, and capture part can be recycled plasticizer and solvent oil, this method is less than 50% of the rate of recovered solvents, and consumes a lot of circulating water cooling high temperature exhaust gas, because of the waste gas containing flash point 60?Solvent oil at 70 °C is prone to fire and even explosion in the process of using static electricity.Due to the low removal rate, the exhaust gas has strong odor, and the recycled mixed liquid is dark brown, which can only be used as fuel for cheap takeaway waste oil, wasting valuable organic resources.

The utility model relates to an organic waste gas recycling and recycling device, which can completely adsorb and recycle organic waste gas for production, desorption waste water is heated to steam, and can be recycled, but the solvent recovered by the recycling device without rectification treatment is waste water mixture, with low purity.A no secondary pollution can be a variety of organic waste gas treatment plant of recycling, the device including waste collection device, gas filter, blower, exhaust temperature adjusting device, cooling tower, water chestnut, adsorption stripping device, so the heat exchange device, layered device, distillation device, the device through multistage heat exchange device makes full use of high temperature exhaust gas and stripping steam clean gas waste heat heating and pre rectification solutions, effectively reduce the equipment operation cost, distillation residual liquid with steam heating into secondary steam, reduce the secondary pollution, improve the recovery rate, but the device of exhaust gas temperature adjusting device is not in detail.

[invention content]

In order to solve the above problems, the invention aims to provide a kind of waste gas treatment device and method in the production process of PVC gloves that can maximize the utilization of heat energy and realize the recycling of organic waste gas.

To achieve the above purposes, the invention adopts the following technical scheme:

A kind of waste gas treatment device in the production process of PVC gloves, including adsorption tank, layered tank, distillation tower, the upper part of the adsorption tank is provided with desorption steam inlet, the bottom of the adsorption tank is provided with desorption solvent mixture outlet, the top of the adsorption tank is provided with clean gas outlet;The outlet of the solvent mixture of the adsorption tank is connected with the stratification groove, and the inlet of the solvent at the bottom of the distillation column is connected with the stratification groove.The utility model is characterized by: it also includes waste heat refrigeration device connected by exhaust gas pipeline and atomizing condensation separator. The exhaust outlet of the atomizing condensation separator is connected to the adsorption tank, and the outlet of the solvent mixture at the bottom of the atomizing condensation separator is connected to the layered tank.The atomized water inlet on the upper part of the atomizing and condensing separator is connected with the stratified groove;The atomizing condensing separator and the waste heat refrigeration device are circularly connected through low-temperature cold water pipeline.The adsorption tank is activated carbon adsorption tank;The adsorption tank is at least 2;The atomizing and condensing separator is provided with a filtering layer internally;The outlet of the top fraction of the rectification tower is connected with a reflux tank.

The utility model relates to a waste gas treatment method in the production process of PVC gloves, the steps of which include:

A) collect the waste gas from the PVC production line and put it into the waste heat refrigeration device to cool the waste gas for the first time. At the same time, the waste gas from the PVC production line serves as the heat source of the waste heat refrigeration device to heat the lithium bromide solution in the waste heat refrigeration device to prepare low-temperature cold water and realize the recycling of heat energy.

B) put the exhaust gas after the first cooling in step a) into the atomized condensation separator. After the exhaust gas is treated with atomized water in the atomized condensation separator, part of the dust and plasticizer in the exhaust gas are removed;Once again, circulating water is injected into the atomizing and condensing separator to cool the exhaust gas for a second time;Then the low-temperature cold water prepared in the waste heat refrigeration device is fed into the atomizing and condensing separator to cool the exhaust gas for the third time.Finally, the exhaust gas after three times of cooling passes through the filtration layer in the atomized condensation separator for filtration, and passes the filtered exhaust gas into the activated carbon adsorption tank. After adsorption treatment, clean air is formed and discharged through the outlet of the clean air in the activated carbon adsorption tank.The use of activated carbon adsorption tank adsorption can remove a small amount of low boiling point solvent oil in the exhaust gas, finally discharge standard clean air.The atomized water is sprayed into the exhaust gas to remove dust, which can reduce the use of water and absorb the heat energy of part of the exhaust gas;Using circulating water and low-temperature moisture produced by waste heat refrigeration device to reduce the temperature of waste gas, while saving water, the temperature of waste gas will be reduced to the expected temperature;High precision hydrophobic filter material filter layer is adopted to remove small droplets and solid particles floating in waste gas;

C) settle the mixed liquid settled at the bottom of the atomization and condensation separator into the stratified groove in the atomization and condensation separator;

D) steam is injected into the adsorption tank for desorption treatment, and the mixture of desorbed solvent and water enters the stratified tank;

E) the upper oil layer of the stratified tank enters the distillation tower for rectification treatment, and the solvent after rectification treatment flows into the finished solvent storage tank for storage;The lower water layer of the stratified tank enters the water layer storage tank, and the water in the water layer storage tank is atomized into atomized condensation separator through atomized chestnut, so as to realize water recycling.

During the rectification process, the distillate at the top of the distillation column is taken into the reflux liquid storage tank, and part of the solvent in the reflux liquid storage tank flows back into the distillation column, and the other part is stored in the finished solvent storage tank.

The above a PVC gloves production waste gas processing method, in the process of it by waste gas treatment plant, waste gas treatment plant including adsorption tank, layered trough, rectifying column, adsorption tank equipped with stripping steam inlet, the top of the adsorption at the bottom of the tank is equipped with, the export of the attached solvent mixture, adsorption at the top of the tank is equipped with clean gas exports;The outlet of the solvent mixture of the adsorption tank is connected with the stratification groove, and the inlet of the solvent at the bottom of the distillation column is connected with the stratification groove.The waste gas treatment device also includes waste heat refrigeration device connected by waste gas pipeline and atomizing condensation separator. The exhaust outlet of the atomizing condensation separator is connected to the adsorption tank, and the outlet of solvent mixture at the bottom of the atomizing condensation separator is connected to the layered tank.The atomized water inlet on the upper part of the atomizing and condensing separator is connected with the stratified groove;The atomizing condensing separator and the waste heat refrigeration device are circularly connected through low-temperature cold water pipeline.The adsorption tank is activated carbon adsorption tank, and the adsorption tank is at least 2.The atomizing and condensing separator is provided with a filtering layer.The outlet of the top fraction of the rectification tower is connected with a reflux tank.

Beneficial effects of the present invention is: according to the characteristics of composite PVC product industry emissions of craft waste gas of comprehensive treatment process for the production of PVC gloves, to solve the traditional technology and the low recovery rate, waste of resources, such as below-standard emissions problem, make full use of heat energy in the system resources and recycling of organic solvents, heat and water recycling.

医用手套5