Volatile organic compound treatment device in styrene-acrylic emulsion production

Abstract

The utility model belongs to the technical field of chemical equipment, and discloses a volatile organic compound treatment device in styrene-acrylic emulsion production, which comprises a reaction kettle, and a discharge port at the bottom of the reaction kettle is communicated with a spray device arranged at the upper part of an inner cavity of a spray tower body through a pipeline and a discharge pump. A gas outlet in the top of the reaction kettle communicates with a gas inlet in the bottom of the adsorption tower through a pipeline and a first vacuum pump; a liquid outlet in the bottom of the spray tower is communicated to a finished product storage tank through a pipeline and a discharge pump; a gas outlet in the top of the spray tower is communicated to a gas inlet in the bottom of the adsorption tower through a pipeline and a second vacuum pump; a gas outlet in the top of the adsorption tower communicates with a chimney through a pipeline and a third vacuum pump; a plurality of splitter plates are arranged in the spray tower from top to bottom, and a plurality of adsorption layers are arranged in the adsorption tower from top to bottom. According to the utility model, the content of volatile organic compounds in the styrene-acrylic emulsion is effectively reduced, and the product quality and the environmental safety are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and specifically relates to a volatile organic matter treatment device in the production of styrene-acrylic emulsion. Background Art

[0002] Styrene acrylic emulsion refers to a class of chemicals formed by emulsion polymerization of styrene, acrylamide and acrylates. It is widely used in the fields of paint dyeing and printing adhesives in the printing and dyeing industry, paint adhesives in the construction industry, adhesives in wood processing, etc.

[0003] Since the polymerization reaction of styrene-acrylic emulsion is carried out in emulsion, each reaction monomer undergoes polymerization reaction under the action of initiator. In the initial stage, it absorbs heat for reaction, and then releases heat as the reaction proceeds. The unreacted free monomers and added film-forming aids during production cause styrene-acrylic emulsion products to contain a large amount of volatile organic compounds (VOCs). If these volatile organic compounds are not treated and directly discharged, they will not only pollute the environment, but also seriously endanger human health. However, existing styrene-acrylic emulsion manufacturers still use traditional production processes, resulting in high content of volatile organic compounds in the production workshop and in the product, bad odor, and serious impact on personal safety and product quality. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a volatile organic matter treatment device in the production of styrene acrylic emulsion, which overcomes the defects in the prior art, effectively reduces the volatile organic matter content in the styrene acrylic emulsion, and ensures product quality and environmental safety.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A volatile organic matter treatment device in the production of styrene-acrylic emulsion comprises a reactor, a discharge port at the bottom of the reactor is connected to a spray device arranged at the upper part of the inner cavity of a spray tower body through a pipeline and a discharge pump, a gas outlet at the top of the reactor is connected to an air inlet at the bottom of an adsorption tower through a pipeline and a first vacuum pump; a liquid outlet at the bottom of the spray tower is connected to a finished product storage tank through a pipeline and a discharge pump, a gas outlet at the top of the spray tower is connected to an air inlet at the bottom of the adsorption tower through a pipeline and a second vacuum pump; a gas outlet at the top of the adsorption tower is connected to a chimney through a pipeline and a third vacuum pump; a plurality of diverter plates are arranged from top to bottom in the spray tower, and a plurality of adsorption layers are arranged from top to bottom in the adsorption tower.

[0007] Preferably, the spray device comprises a spray coil, a plurality of liquid outlets are evenly arranged below the wall of the spray coil, and the liquid outlets are all connected to a spray nozzle. The spray nozzle forms a mist of the material, which is conducive to the volatilization of volatile organic matter in the material.

[0008] Preferably, the diverter plate is a triangular structure with the top facing upwards composed of two strip plates, the lower parts of the two strip plates are connected to support columns arranged parallel to the strip plates through a plurality of support strips, and both ends of the support columns are fixedly connected to the wall of the spray tower.

[0009] Preferably, the diverter plates are arranged in several layers, each layer is arranged in several rows; and the diverter plates between two adjacent layers are arranged in a staggered manner.

[0010] The use of a diverter plate allows the material to form several waterfall-like falling flows, which is beneficial to the volatilization of volatile organic compounds.

[0011] Preferably, the adsorption layer is an adsorption layer in which activated carbon layers and activated alumina layers are alternately arranged. Volatile organic matter in the gas is completely eliminated through the alternating adsorption of activated carbon and activated alumina.

[0012] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] The utility model sprays the styrene-acrylic emulsion with a smaller volume through the spraying device, and the volatile organic matter is more likely to volatilize, thereby improving the volatilization efficiency; the styrene-acrylic emulsion is more dispersed through the diversion of the diverter plate, and the volatile organic matter is more likely to volatilize; under the action of the vacuum pump, the volatile organic matter in the material can be volatilized to the greatest extent possible, and then transported to the adsorption tower to be adsorbed by the adsorption layer, so that the volatile organic matter is fixed in the adsorption layer, and the remaining gas is discharged through the chimney.

[0014] In short, the utility model effectively reduces the content of volatile organic matter in styrene acrylic emulsion, ensuring product quality and environmental safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0016] Among them, 1. Reactor; 2. Spray tower; 21. Spray device; 22. Diverter plate; 3. Adsorption tower; 31. Adsorption layer; 4. Finished product storage tank; 5. Chimney. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1As shown, a volatile organic compound treatment device in the production of styrene-acrylic emulsion includes a reactor 1, a discharge port (not marked) at the bottom of the reactor 1 is connected to a spray device 21 arranged at the upper part of the inner cavity of a spray tower 2 through a pipeline (not marked) and a discharge pump (not marked), a gas outlet (not marked) at the top of the reactor 1 is connected to an air inlet at the bottom of an adsorption tower 3 through a pipeline and a first vacuum pump (not marked); a liquid outlet (not marked) at the bottom of the spray tower 2 is connected to a finished product storage tank 4 through a pipeline and a discharge pump (not marked), a gas outlet (not marked) at the top of the spray tower 2 is connected to an air inlet (not marked) at the bottom of the adsorption tower 3 through a pipeline and a second vacuum pump (not marked); a gas outlet (not marked) at the top of the adsorption tower 3 is connected to a chimney 5 through a pipeline and a third vacuum pump (not marked); 5 layers of diverter plates 22 are arranged in the spray tower 2, and 6 layers of adsorption layers 31 are arranged from top to bottom in the adsorption tower 3.

[0019] In actual application, when the reaction kettle 1 is reacting, the generated gas is transported to the adsorption tower 3 through the gas outlet and the first vacuum pump; after the reaction in the reaction kettle 1 is completed, the styrene-acrylic emulsion that has not yet cooled is transported to the spray tower 2 through the discharge pump, and the hot material is sprayed through the spray device 21 and the diversion of the diverter plate 22, as well as the micro-vacuum state formed by the second vacuum pump, so that the volatile organic matter in the material will be volatilized to the greatest extent possible and transported to the adsorption tower 3 through the second vacuum pump for adsorption; the gas containing volatile organic matter from the reaction kettle 1 and the spray tower 2 is alternately adsorbed by the activated carbon layer and the activated alumina layer in the adsorption tower 3, and the volatile organic matter can be adsorbed into the activated carbon and the activated alumina to the maximum extent. Through monitoring, the adsorption rate of the adsorption layer 31 for volatile organic matter can reach more than 90%, and the remaining gas is colorless and odorless, meets the national emission standards, and is discharged through the chimney 5.

[0020] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A device for treating volatile organic compounds in the production of styrene-acrylic emulsion, characterized in that: It includes a reactor, the discharge port at the bottom of the reactor is connected to the spray device arranged at the upper part of the inner cavity of the spray tower body through a pipeline and a discharge pump, the gas outlet at the top of the reactor is connected to the gas inlet at the bottom of the adsorption tower through a pipeline and a first vacuum pump; the liquid outlet at the bottom of the spray tower is connected to the finished product storage tank through a pipeline and a discharge pump, the gas outlet at the top of the spray tower is connected to the gas inlet at the bottom of the adsorption tower through a pipeline and a second vacuum pump; the gas outlet at the top of the adsorption tower is connected to the chimney through a pipeline and a third vacuum pump; a plurality of layers of diverter plates are arranged from top to bottom in the spray tower; a plurality of adsorption layers are arranged from top to bottom in the adsorption tower.

2. The volatile organic compound treatment device in the production of styrene-acrylic emulsion according to claim 1, characterized in that: The spray device comprises a spray coil, a plurality of liquid outlets are evenly arranged below the tube wall of the spray coil, and the liquid outlets are all connected with a spray nozzle.

3. The volatile organic compound treatment device in the production of styrene-acrylic emulsion according to claim 1, characterized in that: The diverter plate is a triangular structure with the top facing upwards, which is composed of two strips. The lower parts of the two strips are connected to support columns arranged parallel to the strips through a plurality of support strips, and the two ends of the support columns are fixedly connected to the wall of the spray tower.

4. The volatile organic compound treatment device in the production of styrene-acrylic emulsion according to claim 1, characterized in that: The diverter plates are arranged in a plurality of layers, and each layer is arranged in a plurality of rows; the diverter plates between two adjacent layers are arranged in a staggered manner.

5. The device for treating volatile organic compounds in the production of styrene-acrylic emulsion according to claim 1, characterized in that: The adsorption layer is an adsorption layer in which activated carbon layers and activated alumina layers are alternately arranged.

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