Drying device for preparing high-purity nitrous oxide by recovering adipic acid tail gas

Abstract

The utility model relates to a drying device, in particular to a drying device for preparing high-purity nitrous oxide by recovering adipic acid tail gas, which belongs to the technical field of adipic acid tail gas treatment and comprises a treatment mounting box, a liquid purification filter element is mounted at one end of the treatment mounting box, and a drying filter element is arranged on one side of the liquid purification filter element. A molecular filtering structure is designed on the other side of the drying filter element, a purification treatment filter element is clamped to one side of the molecular filtering structure, a product storage bin is designed at the other end of the treatment mounting box, and an air outlet control pump is mounted at one end of the product storage bin. The device is rapidly connected with an external structure, the use convenience of the device is improved, products pass through the device and are guided, corresponding gas is correspondingly treated and then is collected, and the classified collection efficiency of the products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drying device, concretely to a drying device for recycling adipic acid tail gas to prepare high-purity nitrous oxide, and belongs to the technical field of adipic acid tail gas treatment. BACKGROUND

[0002] Adipic acid tail gas mainly refers to the waste gas generated in the production process of adipic acid. These waste gases contain a variety of harmful components, which pose a threat to the environment and human health. A large amount of tail gas is generated in the production process of adipic acid, which contains valuable gas components such as nitrous oxide (N2O). Traditionally, these tail gases are directly discharged into the atmosphere, not only causing resource waste, but also having a negative impact on the environment. With the improvement of environmental awareness and technological progress, people have begun to explore methods to recover and purify nitrous oxide from adipic acid tail gas.

[0003] The existing application number for a device for recycling adipic acid tail gas and purifying to prepare high-purity nitrous oxide is CN201721323846.4, which includes a liquefaction separation process and a refrigeration process. The adipic acid tail gas is compressed by a compressor, then passes through decarburization, drying to remove acidic gases and moisture, and is pressurized again. It enters the cold box for cooling and liquefaction separation. Liquid nitrous oxide is collected from the bottom of the rectification tower, and high-pressure nitrogen-rich tail gas is discharged from the top of the tower and enters the turbine expander TU1 for expansion and cooling to provide cold energy. The refrigeration process uses air as the refrigerant, which is compressed, dried, and purified before entering the cold box for heat exchange and cooling. The turbine expander provides the cold energy required for the rectification tower and heat exchanger. The device has a simple process flow and is easy to operate. The refrigerant is easy to obtain and not prone to leakage. The recovery device recovers adipic acid tail gas and purifies to prepare high-purity nitrous oxide, improving the added value of the product and achieving clean production.

[0004] The above-mentioned device has a simple process, improves the preparation effect of high-purity nitrous oxide, but does not detail the specific structure of the device, which is not convenient for overall installation and fixation, reduces the convenience of device use, and usually contains other components in the nitrous oxide product. The separation and storage effect of the above-mentioned device is poor.

[0005] Therefore, the utility model is proposed. Utility model content

[0006] The purpose of the utility model is to provide a drying device for recycling adipic acid tail gas to prepare high-purity nitrous oxide, which has an integrated structure, enhances the installation convenience of the device and the separation function of the device.

[0007] The utility model discloses a drying device for recycling adipic acid tail gas to prepare high-purity nitrous oxide, which realizes the above-mentioned purposes through the following technical solutions.

[0008] Further, in order to preliminarily purify the product, the liquid purification filter element comprises a liquid storage tank, one end of the processing mounting box is provided with an air inlet treatment groove, the liquid storage tank is slidingly connected to the inside of the air inlet treatment groove, and a fixed cover plate is hingedly connected to one side of the upper end of the air inlet treatment groove.

[0009] Further, in order to control the conveying direction of the product, a one-way air inlet valve is embeddedly installed at the lower end of the liquid storage tank, an air inlet connecting pipe is embeddedly installed at the lower end of the air inlet treatment groove, the one-way air inlet valve is slidingly connected to the inside of the air inlet connecting pipe, an air outlet hole is formed at one side of the upper end of the liquid storage tank, and a waterproof air-permeable valve is fixedly installed in the air outlet hole.

[0010] Further, in order to dry the gas, the drying filter element comprises a dustproof air-permeable bag, the dustproof air-permeable bag is filled with a moisture-absorbing material, a moisture-absorbing adjusting groove is formed in the inside of the processing mounting box, and the dustproof air-permeable bag is slidingly connected to the inside of the moisture-absorbing adjusting groove.

[0011] Further, in order to flexibly replace the drying filter element, an air outlet connecting groove is formed at one side of the upper end of the moisture-absorbing adjusting groove, the waterproof air-permeable valve and the air outlet connecting groove are slidingly connected to each other, and a moisture-absorbing sealing plate is hingedly connected to one side of the lower end of the moisture-absorbing adjusting groove.

[0012] Further, in order to separate the gas in the product, the molecular filtration structure comprises a coarse molecular filtration membrane and a fine molecular filtration membrane, separation connecting holes are formed at both ends of one side of the moisture-absorbing adjusting groove, the coarse molecular filtration membrane is embeddedly installed in the inside of the separation connecting hole at the lower side, and the fine molecular filtration membrane is embeddedly installed in the inside of the separation connecting hole at the upper side.

[0013] Further, in order to improve the processing effect of the product, the purification treatment filter element comprises a filter mounting frame, reaction mounting grooves are formed at both sides of the processing mounting box, the filter mounting frame is slidingly connected to the inside of the reaction mounting groove, air-permeable waterproof membranes are fixedly installed at both sides of the filter mounting frame, and functional materials are filled between the air-permeable waterproof membranes.

[0014] Further, in order to increase the storage effect of the gas, one side of the reaction installation groove is communicated with the separation connecting hole respectively, and the other side of the reaction installation groove is inlaid with a one-way output valve, which is communicated with the product storage bin.

[0015] The technical effects and advantages of the utility model are that: through the processing installation box, a plurality of filtering and drying structures are assembled, the device is quickly connected with external structures, the convenience of the device is improved, the product passes through the inside of the device and is guided, the corresponding gas is treated and collected, and the classification and collection efficiency of the product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a side sectional view structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the liquid purification filter element part in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the purification treatment filter element in the utility model;

[0020] In the drawing: 1, processing installation box; 2, liquid purification filter element; 201, liquid storage tank; 202, fixed cover plate; 203, one-way air inlet valve; 204, waterproof air valve; 3, drying filter element; 301, dustproof air bag; 302, moisture absorbing material; 303, moisture absorbing sealing plate; 4, molecular filtration structure; 5, purification treatment filter element; 501, filtering installation frame; 502, air-permeable waterproof membrane; 503, functional material; 504, one-way output valve; 6, product storage bin; 7, air outlet control pump. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figures 1-4As shown, a drying device for recovering high-purity nitrous oxide from adipic acid tail gas, comprising a treatment mounting box 1, one end of the treatment mounting box 1 is provided with a liquid purification filter element 2, which is used for purifying the liquid impurities in the tail gas, one side of the liquid purification filter element 2 is provided with a drying filter element 3, which is used for removing the moisture in the tail gas to ensure the dryness of the tail gas, the other side of the drying filter element 3 is designed with a molecular filtration structure 4, which is used for further separating different components in the tail gas or removing specific impurities, one side of the molecular filtration structure 4 is clamped with a purification treatment filter element 5, which is used for deep purification of the tail gas to prepare high-purity nitrous oxide, the other end of the treatment mounting box 1 is designed with a product storage bin 6, which is used for storing high-purity nitrous oxide after purification treatment, one end of the product storage bin 6 is provided with an air outlet control pump 7, which is used for controlling the discharge of high-purity nitrous oxide.

[0023] The liquid purification filter element 2 comprises a liquid storage tank 201, one end of the treatment mounting box 1 is provided with an air inlet treatment groove, the liquid storage tank 201 is slidably connected to the inside of the air inlet treatment groove, a fixed cover plate 202 is hinged to one side of the upper end of the air inlet treatment groove, a one-way air inlet valve 203 is embeddedly installed at the lower end of the liquid storage tank 201, an air inlet connecting pipe is embeddedly installed at the lower end of the air inlet treatment groove, the one-way air inlet valve 203 is slidably connected to the inside of the air inlet connecting pipe, an air outlet hole is formed at one side of the upper end of the liquid storage tank 201, and a waterproof air permeable valve 204 is fixedly installed in the air outlet hole. This design of liquid purification filter element 2 can efficiently remove liquid impurities in the tail gas, while ensuring the dryness and purification effect of the tail gas. Through the design of sliding connection and hinge connection, the whole device is convenient to install, disassemble and maintain. In addition, the use of one-way air inlet valve 203 and waterproof air permeable valve 204 also improves the reliability and safety of the device.

[0024] The drying filter element 3 comprises a dustproof air-permeable bag 301, the inside of the dustproof air-permeable bag 301 is filled with a moisture absorbing material 302, a moisture absorbing adjusting groove is formed in the inside of the treatment mounting box 1, the dustproof air-permeable bag 301 is slidably connected to the inside of the moisture absorbing adjusting groove, an air outlet connecting groove is formed at one side of the upper end of the moisture absorbing adjusting groove, the waterproof air permeable valve 204 and the air outlet connecting groove are slidably connected to each other, and a moisture absorbing sealing plate 303 is hinged to one side of the lower end of the moisture absorbing adjusting groove. This design of drying filter element 3 can efficiently remove moisture in the tail gas, while ensuring the dryness and purification effect of the tail gas. Through the design of sliding connection and hinge connection, the whole device is convenient to install, disassemble and maintain. In addition, the use of dustproof air-permeable bag 301 and waterproof air permeable valve 204 also improves the reliability and safety of the device. This design ensures that the tail gas can fully contact with the moisture absorbing material 302 when passing through the drying filter element 3, thereby achieving the best drying effect.

[0025] The molecular filtration structure 4 includes a coarse molecular filtration membrane and a fine molecular filtration membrane, and the moisture adjusting groove is provided with a separation connecting hole at each end of one side, the coarse molecular filtration membrane is inlaidly installed in the separation connecting hole at the lower side, and the fine molecular filtration membrane is inlaidly installed in the separation connecting hole at the upper side. This design ensures that impurities in the tail gas can be gradually removed when the tail gas passes through the molecular filtration structure 4, thereby achieving a higher purification effect. The combination of the coarse molecular filtration membrane and the fine molecular filtration membrane can not only remove larger particles in the tail gas, but also remove smaller particles, so that the tail gas is sufficiently purified before reaching the subsequent purification treatment filter core 5. In addition, the design of the molecular filtration structure 4 also takes into account the need for easy replacement and maintenance. When the coarse molecular filtration membrane or the fine molecular filtration membrane reaches saturation or needs to be replaced, it can be replaced by opening the corresponding connecting hole without disassembling the entire treatment installation box 1. This design improves the reliability and ease of use of the entire device.

[0026] The purification treatment filter core 5 includes a filter installation frame 501, and the treatment installation box 1 is provided with a reaction installation groove at each side, the filter installation frame 501 is slidingly connected to the inside of the reaction installation groove, the filter installation frame 501 is fixedly installed with a breathable waterproof membrane 502 at each side, the breathable waterproof membranes 502 are filled with functional materials 503, one side of the reaction installation groove is in communication with the separation connecting holes, and the other side of the reaction installation groove is inlaidly installed with a one-way output valve 504 for controlling the outflow direction of the tail gas to ensure that the tail gas can only enter the product storage bin 6 and cannot flow back. The one-way output valve 504 is in communication with the product storage bin 6. This design of the purification treatment filter core 5 can efficiently remove specific impurities in the tail gas, ensuring that the tail gas is sufficiently purified before reaching the product storage bin 6. Through the design of sliding connection and one-way valve, the entire device is easy to install, disassemble and maintain. In addition, the use of the breathable waterproof membrane 502 and the functional material 503 improves the reliability and purification effect of the device. This design ensures that the tail gas can be in full contact with the functional material 503 when passing through the purification treatment filter core 5, thereby achieving the best purification effect.

[0027] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0028] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A drying apparatus for recovering adipic acid tail gas to produce high-purity nitrous oxide, comprising a processing installation box (1), characterized in that: One end of the processing installation box (1) is equipped with a liquid purification filter element (2), a drying filter element (3) is provided on one side of the liquid purification filter element (2), a molecular filtration structure (4) is designed on the other side of the drying filter element (3), a purification processing filter element (5) is clamped on one side of the molecular filtration structure (4), a product storage bin (6) is designed on the other end of the processing installation box (1), and an exhaust control pump (7) is installed on one end of the product storage bin (6).

2. The drying apparatus for producing high-purity nitrous oxide from adipic acid tail gas according to claim 1, characterized in that: The liquid purification filter element (2) includes a liquid storage tank (201). One end of the treatment installation box (1) is provided with an air inlet treatment groove. The liquid storage tank (201) is slidably engaged inside the air inlet treatment groove. A fixed cover plate (202) is hinged to one side of the upper end of the air inlet treatment groove.

3. The drying apparatus for producing high-purity nitrous oxide from adipic acid tail gas according to claim 2, characterized in that: A one-way air inlet valve (203) is embedded in the lower end of the liquid storage tank (201), and an air inlet connecting pipe is embedded in the lower end of the air inlet treatment tank. The one-way air inlet valve (203) is slidably engaged inside the air inlet connecting pipe. An air outlet is opened on one side of the upper end of the liquid storage tank (201), and a waterproof vent valve (204) is fixedly installed inside the air outlet.

4. The drying apparatus for producing high-purity nitrous oxide from adipic acid tail gas according to claim 3, characterized in that: The drying filter element (3) includes a dustproof and breathable bag (301), the dustproof and breathable bag (301) is filled with moisture-absorbing material (302), the processing installation box (1) has a moisture-absorbing adjustment groove inside, and the dustproof and breathable bag (301) is slidably snapped into the moisture-absorbing adjustment groove.

5. The drying apparatus for producing high-purity nitrous oxide from recovered adipic acid tail gas according to claim 4, characterized in that: An air outlet connection groove is provided on one side of the upper end of the moisture absorption regulating groove. The waterproof and breathable valve (204) is slidably engaged with the air outlet connection groove. A moisture absorption sealing plate (303) is hinged to one side of the lower end of the moisture absorption regulating groove.

6. The drying apparatus for producing high-purity nitrous oxide from adipic acid tail gas according to claim 4, characterized in that: The molecular filtration structure (4) includes a coarse molecular filtration membrane and a fine molecular filtration membrane. Separation connection holes are provided at both ends of one side of the moisture-absorbing regulating groove. The coarse molecular filtration membrane is embedded in the lower separation connection hole, and the fine molecular filtration membrane is embedded in the upper separation connection hole.

7. The drying apparatus for producing high-purity nitrous oxide from adipic acid tail gas according to claim 6, characterized in that: The purification filter element (5) includes a filter mounting frame (501). Both sides of the treatment mounting box (1) are provided with reaction mounting grooves. The filter mounting frame (501) is slidably engaged with the inside of the reaction mounting groove. Breathable and waterproof membranes (502) are fixedly installed on both sides of the filter mounting frame (501). Functional materials (503) are filled between the breathable and waterproof membranes (502).

8. The drying apparatus for producing high-purity nitrous oxide from adipic acid tail gas according to claim 7, characterized in that: One side of the reaction mounting tank is connected to the separation connection hole, and a one-way output valve (504) is embedded in the other side of the reaction mounting tank. The one-way output valve (504) is connected to the product storage bin (6).

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