Casting solvent catcher

Abstract

The utility model provides a tape casting solvent catcher which comprises a rack, a refrigerating system is arranged on the rack and comprises an evaporator, a steam inlet is formed in the evaporator and communicated with a waste gas header pipe in the tape casting process, and two output ends of the evaporator are respectively communicated with a filter and a purified liquid storage device. Condensable gas in the waste gas is condensed into liquid to enter the purified liquid storage device, an air exhaust port is formed in the filter, and non-condensable gas in the waste gas enters the filter to be filtered and then is exhausted through the air exhaust port. According to the utility model, the organic solvent in the waste gas of the tape casting process can be effectively recovered, the condensable organic solvent is condensed into liquid, the liquid is stored in the purified liquid storage device and finally discharged back to the tape casting equipment storage tank, so that the solvent is recycled, the loss of the solvent is reduced, the raw material cost of an enterprise is reduced, and the economic benefit of the enterprise is improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of tape casting technology, in particular to a tape casting solvent catcher. Background Art

[0002] Currently, in the field of tape casting processes (such as the tape casting process of alumina or aluminum nitride), the conventional waste gas treatment model is that the exhaust gas from each exhaust section is first converged into a centralized waste gas main. The waste gas is then transported through pipelines to the waste gas treatment center established in the factory. After undergoing washing and adsorption operations, it is further dried and finally enters the RTO (regenerative thermal oxidizer) for incineration treatment.

[0003] However, for relatively small cast film equipment companies with low exhaust volumes, this centralized exhaust gas treatment model presents numerous drawbacks. The equipment required for centralized exhaust gas treatment is massive and complex, involving energy scrubbing, adsorption, and RTO devices. These devices not only have short operating cycles but also require frequent replacement of adsorption materials. Furthermore, the RTO equipment requires a continuous supply of auxiliary fuel. These factors contribute to high operating costs for exhaust gas treatment, placing a heavy financial burden on production operations and significantly limiting their growth. Utility Model Content

[0004] 1. Technical problems to be solved by the utility model:

[0005] The utility model provides a casting solvent catcher, which is used to solve the technical problems existing in the above background technology.

[0006] 2. Technical solution:

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is: a casting solvent capturer, comprising a frame, a refrigeration system is arranged on the frame, the refrigeration system comprises an evaporator, a steam inlet is arranged on the evaporator, the steam inlet is connected to the exhaust gas main pipe in the casting process, the two output ends of the evaporator are respectively connected to the filter and the purified liquid storage, the condensable gas in the exhaust gas is condensed into liquid and enters the purified liquid storage, the filter is provided with an air outlet, the non-condensable gas in the exhaust gas enters the filter, is filtered and then discharged through the air outlet.

[0008] Preferably, the refrigeration system also includes a compressor, an oil separator, a condenser, a drying filter, a refrigerant liquid reservoir, an electronic expansion valve and an evaporator. The outlet of the compressor is connected to the inlet of the oil separator, the outlet of the oil separator is connected to the condenser, the outlet of the condenser is connected to the drying filter, the refrigerant liquid reservoir, and the electronic expansion valve in sequence, the outlet of the electronic expansion valve is connected to the evaporator, and the outlet of the evaporator is then connected to the inlet of the compressor to form a closed circulation system.

[0009] Preferably, a fan is provided on the top of the rack, the fan is arranged above the condenser, and the air inlet of the fan is close to the condenser.

[0010] Preferably, a liquid level gauge is provided in the purified liquid storage, and the output end of the purified liquid storage is connected to the storage tank of the casting equipment. When the purified liquid storage is full, it is automatically discharged into the storage tank of the casting equipment. The purified liquid storage generates an air seal by air pressure to prevent the condensed liquid from volatilizing again.

[0011] 3.Beneficial effects:

[0012] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0013] The utility model can effectively recover the organic solvent in the waste gas of the casting process, condense the condensable organic solvent into liquid and store it in the purified liquid storage device, and finally discharge it back to the storage tank of the casting equipment, so as to realize the recovery and reuse of the solvent, reduce the loss of the solvent, and reduce the raw material cost of the enterprise. The recovery and reuse of the solvent directly reduces the cost of the enterprise to purchase new solvents, and in the long run, it saves the enterprise a lot of money. Compared with the traditional centralized waste gas treatment method, the casting solvent catcher does not require large equipment and frequent replacement of adsorption materials and auxiliary fuels, which significantly reduces equipment investment, operation and maintenance costs, and improves the economic benefits of the enterprise.

[0014] The utility model effectively reduces the emission of organic solvents and other harmful substances in the exhaust gas by condensing and recovering the condensable gas in the exhaust gas and filtering and purifying the non-condensable gas, greatly reduces the pollution to the atmospheric environment, and helps to improve the regional air quality.

[0015] The purified liquid storage of the utility model is provided with a liquid level gauge, which can automatically monitor the liquid level and automatically discharge it into the storage tank of the casting equipment when it is full. The air seal is generated by air pressure to prevent the secondary volatilization of the condensed liquid, thereby reducing manual operation and solvent volatilization loss. At the same time, the overall structure of the equipment is stable, and the various components work well together, which reduces the probability of failure and ensures long-term stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the utility model from another angle;

[0018] Figure 3 This is a schematic diagram of the external structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the external structure of the utility model from another angle.

[0020] Reference numerals:

[0021] 1. Frame; 2. Condenser; 3. Fan; 4. Filter; 5. Air exhaust outlet; 6. Dry filter; 7. Evaporator; 8. Steam inlet; 9. Compressor; 10. Purified liquid storage; 11. Oil separator; 12. Electronic expansion valve; 13. Refrigerant liquid storage tank. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," "provided with," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] It should be noted that the structures not introduced in the present invention do not involve the design points and improvement directions of the present invention, and are the same as the existing technology or can be implemented by using the existing technology, so they are not described in detail here. Example

[0027] Refer to the attached Figures 1 to 4 A casting solvent capture device includes a frame 1, a refrigeration system is provided on the frame 1, the refrigeration system includes an evaporator 7, a steam inlet 8 is provided on the evaporator 7, the steam inlet 8 is connected to the exhaust gas main pipe in the casting process, and the two output ends of the evaporator 7 are respectively connected to the filter 4 and the purified liquid storage 10. The condensable gas in the exhaust gas is condensed into liquid and enters the purified liquid storage 10. The filter 4 is provided with an air outlet 5. The non-condensable gas in the exhaust gas enters the filter 4, is filtered, and then is discharged through the air outlet 5.

[0028] The refrigeration system also includes a compressor 9, an oil separator 11, a condenser 2, a drying filter 6, a refrigerant liquid reservoir 13, an electronic expansion valve 12 and an evaporator 7. The outlet of the compressor 9 is connected to the inlet of the oil separator 11, the outlet of the oil separator 11 is connected to the condenser 2, the outlet of the condenser 2 is connected to the drying filter 6, the refrigerant liquid reservoir 13, and the electronic expansion valve 12 in sequence, the outlet of the electronic expansion valve 12 is connected to the evaporator 7, and the outlet of the evaporator 7 is connected to the inlet of the compressor 9 to form a closed circulation system.

[0029] A fan 3 is provided on the top of the rack 1 . The fan 3 is arranged above the condenser 2 , and an air inlet of the fan 3 is close to the condenser 2 .

[0030] A liquid level gauge is provided in the purified liquid storage 10. The output end of the purified liquid storage 10 is connected to the storage tank of the casting equipment. When the purified liquid storage 10 is full, it is automatically discharged into the storage tank of the casting equipment. The purified liquid storage 10 generates an air seal by air pressure to prevent the condensed liquid from volatilizing again.

[0031] Working principle:

[0032] The waste gas generated during the casting process enters the steam inlet 8 of the evaporator 7 through the waste gas main. The waste gas contains organic solvent vapor. At this time, the refrigeration system starts working. The compressor 9 sucks in the low-temperature, low-pressure refrigerant gas and compresses it into a high-temperature, high-pressure gas. After the gas is discharged into the oil separator 11 to separate the lubricating oil, it enters the condenser 2. In the condenser 2, under the action of the fan 3, the refrigerant gas exchanges heat with the outside air and is cooled and liquefied. It then passes through the drying filter 6 to remove moisture and impurities, the refrigerant liquid reservoir 13 for storage and regulation, and the electronic expansion valve 12 for throttling and pressure reduction, becoming a low-temperature, low-pressure refrigerant liquid mixture that enters the evaporator tube of the evaporator 7.

[0033] The absorption tubes inside the evaporator 7 and the cold plate outside the discharge pipe transfer heat to the refrigerant inside the tubes through heat conduction and convection. The refrigerant inside the tubes absorbs the heat from the organic solvent vapor, causing it to evaporate and absorb heat from the surrounding environment, thereby achieving vaporization. During this process, the organic solvent vapor outside the tubes is continuously captured and liquefied, converging and separating into small droplets, eventually forming a large liquid mass. Under the influence of external pressure and gravity, as well as the internal structural design of the evaporator 7, the liquid condensables are separated from the non-condensable gases. The liquid then flows through the confluence pipe into the purified liquid storage 10. Simultaneously, a small amount of condensed vapor with a low boiling point (including non-condensable gases and a small amount of partially condensed condensable gases) flows toward the other output end of the evaporator 7 and enters the filter 4.

[0034] In the filter 4, the adsorption material can well adsorb the condensable vapors that have not been captured and not completely condensed, and further separate the air. The small amount of residual liquid condensables will gather on the surface or inside the filter element to form droplets and flow downward along the filter element under the action of gravity, and finally gather in the liquid collection area at the bottom of the filter 4. After collection, the liquid can also enter the recovery tank and other subsequent treatments, and the purified non-condensable gas is discharged from the air outlet 5.

[0035] After the liquid condensable material enters the recovery tank, air pressure is used to create an air seal to prevent the condensed liquid from volatilizing again. In the purified liquid storage 10, the liquid level gauge monitors the liquid level in real time. When the liquid level reaches the set height and the purified liquid storage 10 is full, the liquid is automatically discharged into the storage tank of the casting equipment.

[0036] The collector can effectively recover the organic solvent in the waste gas of the casting process, condense the condensable organic solvent into liquid and store it in the purified liquid storage 10, and finally discharge it back to the casting equipment storage tank, thereby realizing the recovery and reuse of the solvent, reducing the loss of solvent and reducing the raw material cost of the enterprise.

[0037] By condensing and recovering the condensable gas in the exhaust gas and filtering and purifying the non-condensable gas, the emission of harmful substances in the exhaust gas is greatly reduced, the pollution to the environment is reduced, and environmental protection requirements are met.

[0038] Compared with the traditional centralized waste gas treatment method, for small-scale cast film equipment companies, this catcher does not require large centralized waste gas treatment equipment, frequent replacement of adsorption materials, and the use of auxiliary fuels, which reduces the company's equipment investment, operation and maintenance costs in waste gas treatment and improves the company's economic benefits.

[0039] The above-mentioned embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, which all fall within the scope of protection of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.

Claims

1. A casting solvent catcher, comprising a frame (1), characterized in that: The frame (1) is provided with a refrigeration system, which includes an evaporator (7). The evaporator (7) is provided with a steam inlet (8), and the steam inlet (8) is connected to the exhaust gas main pipe in the casting process. The two output ends of the evaporator (7) are respectively connected to the filter (4) and the purified liquid storage (10). The condensable gas in the exhaust gas is condensed into liquid and enters the purified liquid storage (10). The filter (4) is provided with an air outlet (5). The non-condensable gas in the exhaust gas enters the filter (4), is filtered, and is then discharged through the air outlet (5).

2. The casting solvent trap according to claim 1, wherein: The refrigeration system further comprises a compressor (9), an oil separator (11), a condenser (2), a drying filter (6), a refrigerant liquid reservoir (13), an electronic expansion valve (12) and an evaporator (7), wherein the outlet of the compressor (9) is connected to the inlet of the oil separator (11), the outlet of the oil separator (11) is connected to the condenser (2), the outlet of the condenser (2) is connected to the drying filter (6), the refrigerant liquid reservoir (13) and the electronic expansion valve (12) in sequence, the outlet of the electronic expansion valve (12) is connected to the evaporator (7), and the outlet of the evaporator (7) is further connected to the inlet of the compressor (9), forming a closed circulation system.

3. The casting solvent trap according to claim 2, wherein: A fan (3) is provided on the top of the frame (1), and the fan (3) is arranged above the condenser (2), with an air inlet of the fan (3) close to the condenser (2).

4. The casting solvent trap according to claim 1, wherein: A liquid level gauge is provided in the purified liquid storage (10), and the output end of the purified liquid storage (10) is connected to the storage tank of the casting equipment. When the purified liquid storage (10) is full, the purified liquid storage (10) is automatically discharged into the storage tank of the casting equipment. An air seal is generated in the purified liquid storage (10) by air pressure to prevent the condensed liquid from volatilizing again.

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