Manufacturing method of waste gas treatment device in the production process of PVC gloves

- Dec 26, 2020-

Background technique:


In the production process of PVC gloves, after the PVC powder is mixed with solvent oil, plasticizer and other substances, it is baked at a high temperature in the production line oven, and a large amount of peculiar fume gas is volatilized. Its main ingredients are D series solvent oil, increasing For plasticizers, the exhaust gas discharge temperature is usually above 120°C. Direct emission to the atmosphere will cause serious pollution, affect the production and life of employees and surrounding residents, and waste a lot of heat.


At present, most factories are collected by the gas gathering system and then subjected to electrostatic adsorption and removal after simple condensation. This traditional treatment method usually first cools the exhaust gas at 120°C to about 70°C, and then electrostatically captures the oil mist in the exhaust gas. Part of the plasticizer and solvent oil can be recovered. The recovery volume rate of this method is extremely low, and explosion accidents are prone to occur during the use of high-voltage static electricity. The exhaust gas has a strong peculiar smell, and the recovered mixed liquid is used as kerosene, which cannot be reused for production and wastes raw materials and heat.


A device and method for treating waste gas in the production process of PVC gloves. The device can recover organic waste gas solvent oil for production, but the waste heat refrigeration equipment in the device consumes less heat in winter, and the cooling effect is not good, and a lot of waste Thermal energy, activated carbon desorption requires high-temperature steam to consume energy, and activated carbon needs to be replaced regularly, which is costly.

pvc vinyl glove dipping machine

Technical realization elements:


The purpose of the utility model is to overcome the above-mentioned defects and propose a waste gas treatment device in the production process of PVC gloves.


The waste gas treatment device in the production process of PVC gloves of the utility model includes a stratification tank, a rectification tower, a solvent storage tank, a heat exchanger, a cooler, an electrostatic adsorber, an induced draft fan, a spray tower, and a circulating pool. The outlet of the pool is connected to the inlet of the rectification tower through a pipeline, and the outlet of the rectification tower is connected to the solvent storage tank through a pipeline. The tube side inlet of the heat exchanger is connected with the exhaust gas, and the tube side outlet is connected to the cooling unit through the pipeline in turn The discharge port of the electrostatic adsorber is connected with the feed port of the stratified tank through the first branch pipe, and the water outlet at the bottom of the spray tower is connected to the spray tower through the spray pump. The spray layer of the shower tower is connected, the discharge port at the bottom of the spray tower is connected with the feed port of the stratification tank through a second branch pipe, and the water outlet of the circulating pool is connected with the mist removal layer of the spray tower through a cleaning pump.


The cooler includes a primary cooler and a secondary cooler that are connected in sequence, the primary cooler is connected to a circulating water pool through a pipeline, and the secondary cooler is connected to a lithium bromide refrigeration unit through a pipeline.


The water outlet at the bottom of the leaching tower is communicated with the water outlet of the stratification tank through a third branch pipe.


Working principle and process: The exhaust gas produced by the PVC production line is cooled by a heat exchanger for the first time, and the heat in the exhaust gas is recovered to provide a heat source for the lithium bromide refrigeration unit to prepare chilled water. The exhaust gas after the first cooling is passed to the first stage The cooler performs a second cooling, the cold medium in the primary cooler is the circulating water in the circulating pool; then the exhaust gas enters the secondary cooler for the third cooling, and the secondary cooler is passed into the lithium bromide refrigerator. Chill water at 7°C, cool the exhaust gas to 15°C. At this temperature, plasticizer and solvent oil in the exhaust gas will condense into small droplets, which are easy to adsorb to electrostatic equipment, reduce the possibility of fire, and increase safety. 15°C exhaust gas enters static electricity The adsorber performs electrostatic adsorption, and the adsorbed solvent oil enters the stratified pool through the pipeline. After passing through the electrostatic adsorber, traces of organic waste gas remain in the gas. The gas is blown into the spray tower through the induced draft fan, and the spray pump and The cleaning pump makes the gas in the spray tower pass through the spray layer and the defogging layer in turn to remove the splash water mist and small particles. The sprayed mixed liquid flows into the stratification tank through the second branch, and the mixed solution in the stratification tank passes through the static After layering, the solvent oil in the upper layer is rectified in the rectification tower and then enters the solvent storage tank for storage, and the water in the lower layer is returned to the spray tower through the third branch for recycling.


The beneficial effect of the utility model is that by setting a heat exchanger, a primary cooler, and a secondary cooler, the temperature is lowered three times, so that the plasticizer and solvent oil in the exhaust gas are condensed into small droplets, which is easy to adsorb by the electrostatic adsorber. And reduce the possibility of fire and increase safety; by setting up spray towers, stratified pools, and second and third branches, the clean water in the lower layer of the stratified pool can be recycled, and the organic solvent, heat and water can be recycled, reused and discharged. Up to standard.

Technical features:


1. A waste gas treatment device in the production process of PVC gloves, including a stratification tank, a rectification tower, and a solvent storage tank. The discharge port of the stratification tank is connected to the inlet of the rectification tower through a pipeline, and the outlet of the rectification tower passes through The pipeline is connected to the solvent storage tank, which is characterized in that it also includes a heat exchanger, a cooler, an electrostatic adsorber, an induced draft fan, a spray tower, and a circulating pool. The tube side inlet of the heat exchanger is connected with the exhaust gas, and the tube side outlet passes through The pipeline is connected to the tube side of the cooler, the electrostatic adsorber, the induced draft fan, and the spray tower in sequence. The discharge port of the electrostatic adsorber communicates with the feed port of the stratification tank through the first branch pipe, and the water outlet at the bottom of the spray tower The spraying pump is connected to the spraying layer of the spraying tower, the outlet at the bottom of the spraying tower is connected to the feed inlet of the stratification tank through the second branch pipe, and the water outlet of the circulating pool is connected to the demisting layer of the spraying tower through the cleaning pump .


2. The exhaust gas treatment device in the production process of PVC gloves according to claim 1, characterized in that: the cooler comprises a primary cooler and a secondary cooler connected in sequence, and the primary cooler is connected to The circulating pool is connected, and the secondary cooler is connected to the lithium bromide refrigeration unit through a pipeline.


3. The waste gas treatment device in the production process of PVC gloves according to claim 2, characterized in that: the water outlet at the bottom of the leaching tower is connected to the water outlet of the stratification tank through a third branch pipe.

Technical summary

The utility model relates to an exhaust gas treatment device, in particular to an exhaust gas treatment device in the production process of PVC gloves. The utility model condenses the plasticizer and solvent oil in the exhaust gas into small liquid droplets through three times of cooling, which is easy to adsorb by the electrostatic adsorber and reduces the possibility of fire. The utility model includes a heat exchanger, a cooler, an electrostatic adsorber, an induced draft fan, a spray tower, and a circulating pool. The tube side inlet of the heat exchanger is connected with exhaust gas, and the tube side outlet is connected to the cooler tube side in turn through a pipeline. Electrostatic adsorber, induced draft fan, spray tower, the discharge port of the electrostatic adsorber communicates with the feed port of the stratification tank through the first branch pipe, and the water outlet at the bottom of the spray tower is sprayed with the spray tower through the spray pump The discharge port at the bottom of the spray tower is connected with the feed port of the stratification tank through a second branch pipe, and the water outlet of the circulating pool is connected with the mist removal layer of the spray tower through a cleaning pump.