Dehumidifying air-blast system for recycling dezincification waste heat

Abstract

The utility model relates to the technical field of metallurgical industry production, and discloses a dehumidification air-blast system for recycling dezincification waste heat, which comprises an air pretreatment unit, a dezincification waste heat recycling unit, a dezincification waste heat recycling unit, a dezincification waste heat recycling unit, a dezincification waste heat recycling unit and a dezincification waste heat recycling unit, the dehumidification unit is connected with the air pretreatment unit, and the dehumidification unit is used for dehumidifying the clean compressed air to form dry air; the dezincification condenser comprises a conveying pipeline and a heat exchange pipeline, the conveying pipeline is connected with the dehumidification unit and used for being connected with the dezincification reduction furnace, the heat exchange pipeline makes contact with the conveying pipeline, and a heat exchange medium in the heat exchange pipeline is used for heating dry air in the conveying pipeline; according to the dezincification reduction furnace, the temperature of air blown into the dezincification reduction furnace can be greatly increased, and the reduction efficiency is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical industrial production technology, and in particular to a dehumidification blower system for recovering and reusing waste heat from zinc removal. Background Technology

[0002] For pyrometallurgical dezincification technology, dehumidification blasting technology is crucial for ensuring the efficiency, output, and overall operational effectiveness of the dezincification reduction furnace. This technology reduces the heat consumed by moisture decomposition within the furnace, thereby saving coke combustion and lowering the fuel ratio. Specifically, the core of dehumidification blasting technology is to increase the dryness of the blast air by removing moisture, and then blow this dry air into the furnace through a blower to improve system thermal and combustion efficiency.

[0003] There are three main types of dehumidification blower technology: freeze-drying, adsorption dehumidification, and a combination of freeze-drying and adsorption dehumidification. Among them, the combined freeze-drying and adsorption dehumidification method combines the advantages of both methods, making it a highly efficient and energy-saving dehumidification method. Specifically, this method first lowers the air temperature to cause water vapor to condense into liquid water (water vapor saturation precipitation), removing the moisture through physical separation; then, the moisture-absorbing material on a rotating wheel further continuously adsorbs and dehumidifies, achieving deep removal of moisture from the air.

[0004] The dry air produced by the above three dehumidification blower technologies is at a low temperature. When blown into the zinc dehydration reduction furnace, it will consume the heat in the furnace, which is not conducive to the smooth operation of the furnace. Utility Model Content

[0005] The purpose of this invention is to provide a dehumidification blower system for recovering and reusing waste heat from zinc removal, aiming to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a dehumidification blower system for recovering and reusing waste heat from zinc removal, comprising:

[0007] An air pretreatment unit is used to connect to an air source and to filter and compress the air output from the air source to form clean compressed air.

[0008] A dehumidifier unit is connected to the air pretreatment unit, and the dehumidifier unit is used to dehumidify the clean compressed air to form dry air;

[0009] A zinc stripping condenser includes a delivery pipeline and a heat exchange pipeline. The delivery pipeline is connected to the dehumidifier unit and is used to connect to the zinc stripping reduction furnace. The heat exchange pipeline is in contact with the delivery pipeline, wherein the heat exchange medium in the heat exchange pipeline is used to heat the dry air in the delivery pipeline.

[0010] Optionally, the heat exchange pipeline includes a heat-conducting layer disposed on the inner wall of the delivery pipeline and a heat exchange pipe disposed within the heat-conducting layer.

[0011] Optionally, the air pretreatment unit includes an air filter and an air compressor, the air source is connected to the air filter, and the air filter is connected to the air compressor.

[0012] Optionally, the air filter includes a filtered air inlet, a filtered air outlet, and a filter grille disposed between the filtered air inlet and the filtered air outlet.

[0013] Optionally, the air compressor includes a compressed air inlet, a compressed air outlet, and a compression screw disposed between the compressed air inlet and the compressed air outlet.

[0014] Optionally, the dehumidifier unit includes a refrigerated dehumidifier and a rotary dehumidifier, wherein the refrigerated dehumidifier is connected to the air compressor, and the rotary dehumidifier is connected to the refrigerated dehumidifier.

[0015] Optionally, the refrigeration dehumidifier includes an evaporator, a condenser, and a fan.

[0016] Optionally, the rotary dehumidifier includes a dehumidification inlet, a dehumidification outlet, and a rotary wheel disposed between the dehumidification inlet and the dehumidification outlet, wherein the rotary wheel is provided with a moisture-absorbing layer.

[0017] Optionally, it also includes a compressor chiller and a cooling tower, wherein the compressor chiller is connected to the refrigeration dehumidifier, and the cooling tower is connected to both the compressor chiller and the refrigeration dehumidifier.

[0018] Optionally, it also includes a blower, which is connected to both the conveying pipeline and the zinc removal reduction furnace, so that the heated dry air in the conveying pipeline moves toward the zinc removal reduction furnace.

[0019] This utility model discloses the following technical effects: the air is filtered and compressed by the air pretreatment unit to form clean compressed air, and the clean compressed air is dehumidified by the dehumidification unit to form dry air. The dry air is then introduced into the delivery pipeline in the zinc stripping condenser. In the delivery pipeline, the dried low-temperature air is indirectly heated by the heat exchange pipeline, which greatly increases the temperature of the air blown into the zinc stripping reduction furnace and enhances the reduction efficiency. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0022] Figure 2 This is a schematic diagram of the air filter of this utility model;

[0023] Figure 3 This is a schematic diagram of the air compressor of this utility model;

[0024] Figure 4 This is a schematic diagram of the refrigeration dehumidifier of this utility model;

[0025] Figure 5 This is a schematic diagram of the rotary dehumidifier of this utility model;

[0026] Figure 6 This is a schematic diagram of the zinc removal condenser of this utility model;

[0027] Figure 7 This is a schematic diagram of the internal structure of the heat exchange pipe of this utility model;

[0028] Figure 8 This is a schematic diagram of the blower of this utility model;

[0029] Figure 9 This is a schematic diagram of the zinc removal reduction furnace of this utility model;

[0030] Figure 10 This is a schematic diagram of the cooling water tower of this utility model.

[0031] In the diagram: 1. Air pretreatment unit; 11. Air filter; 111. Filtered air inlet; 112. Filtered air outlet; 113. Filter grille; 12. Air compressor; 121. Compressed air inlet; 122. Compressed air outlet; 123. Compressor screw; 2. Dehumidifier unit; 21. Refrigerated dehumidifier; 211. Evaporator; 212. Condenser; 213. Fan; 22. Rotary dehumidifier; 221. Dehumidification inlet; 222. Dehumidification outlet; 223. Rotary wheel; 224. Regeneration air inlet; 225. Regeneration air outlet; 226. Heating device; 3. Zinc removal condenser; 31. Delivery pipeline; 32. Heat exchange pipeline; 321. Heat-conducting layer; 322. Heat exchange pipe; 4. Zinc removal reduction furnace; 5. Compression refrigeration unit; 6. Cooling tower; 7. Blower. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1-10 This utility model provides a dehumidification blower system for recovering and reusing waste heat from zinc removal, comprising:

[0035] Air pretreatment unit 1 is used to connect to an air source and to filter and compress the air output from the air source to form clean compressed air.

[0036] Dehumidifier 2 is connected to air pretreatment unit 1. Dehumidifier 2 is used to dehumidify clean compressed air to form dry air.

[0037] The zinc removal condenser 3 includes a conveying pipeline 31 and a heat exchange pipeline 32. The conveying pipeline 31 is connected to the dehumidifier unit 2 and is used to connect to the zinc removal reduction furnace 4. The heat exchange pipeline 32 is in contact with the conveying pipeline 31. The heat exchange medium in the heat exchange pipeline 32 is used to heat the dry air in the conveying pipeline 31.

[0038] Air is filtered and compressed by air pretreatment unit 1 to form clean compressed air, and dehumidified by dehumidifier unit 2 to form dry air. The dry air is then introduced into the delivery pipeline 31 in zinc stripping condenser 3. In the delivery pipeline 31, the dried low-temperature air is indirectly heated by heat exchange pipeline 32, which significantly increases the temperature of the air blown into zinc stripping reduction furnace 4, thereby enhancing the reduction efficiency.

[0039] In a further optimized design, the air pretreatment unit 1 includes an air filter 11 and an air compressor 12. An air source is connected to the air filter 11, and the air filter 11 is connected to the air compressor 12. The air filter 11 includes a filtered air inlet 111, a filtered air outlet 112, and a filter grille 113 disposed between the filtered air inlet 111 and the filtered air outlet 112. The air compressor 12 includes a compressed air inlet 121, a compressed air outlet 122, and a compression screw 123 disposed between the compressed air inlet 121 and the compressed air outlet 122.

[0040] The air filter 11 has an airflow of 1000 m³ / h at its air inlet 111. It filters dust and particulate matter in the air through multiple layers of filter grilles 113 to obtain clean air. Clean air not only improves subsequent dehumidification efficiency but also prevents pipe blockage and corrosion. The air compressor 12 compresses air through the rotational motion of the compression screw 123 within the cylinder, with a compressed air pressure of 7-10 bar. The increased temperature of the compressed air helps improve heat exchange efficiency, making it easier for water vapor in the air to condense into liquid water, thereby improving the dehumidification effect. Under the same volume, the compressed air contains a higher water vapor content, meaning more moisture can be condensed during cooling, thus improving dehumidification efficiency.

[0041] Further optimizing the design, the dehumidifier unit 2 includes a refrigerated dehumidifier 21 and a rotary dehumidifier 22. The refrigerated dehumidifier 21 is connected to the air compressor 12, and the rotary dehumidifier 22 is connected to the refrigerated dehumidifier 21. The refrigerated dehumidifier 21 includes an evaporator 211, a condenser 212, and a fan 213. It also includes a compressor refrigeration unit 5 and a cooling tower 6. The compressor refrigeration unit 5 is connected to the refrigerated dehumidifier 21, and the cooling tower 6 is connected to both the compressor refrigeration unit 5 and the refrigerated dehumidifier 21.

[0042] The refrigerant in the dehumidifier 21 is low-temperature chilled water (soft water, T=6℃) prepared by the compressor refrigeration unit 5. Pre-treated ambient air enters the dehumidifier 21 and undergoes indirect heat exchange with the low-temperature chilled water in the evaporator 211 of the dehumidifier 21, causing the temperature to drop to 8℃. The chilled water temperature rises to 14℃ and returns to the compressor refrigeration unit 5 for cooling and recirculation. Inside the dehumidifier 21, moisture in the low-temperature air precipitates as liquid water (dehumidification condensate) due to supersaturation. The condensed dehumidification condensate collects on the fins of the evaporator 211 and flows into the collection tank, then into the cooling tower 6 through the drain pipe. The cooling water in the cooling tower 6 is cooled by the compressor refrigeration unit 5 to ensure normal operation of the equipment. The dehumidified low-temperature air enters the condenser 212 of the dehumidifier 21 through the pressure difference generated by the fan 213, where it exchanges heat with the waste heat from condensation, resulting in a slight temperature increase (to 10-15℃).

[0043] The design is further optimized so that the rotary dehumidifier 22 includes a dehumidification inlet 221, a dehumidification outlet 222, and a rotary wheel 223 disposed between the dehumidification inlet 221 and the dehumidification outlet 222. A moisture-absorbing layer is disposed on the rotary wheel 223.

[0044] Furthermore, the rotary dehumidifier 22 also includes a regenerated air inlet 224, a regenerated air outlet 225, and a heating device 226. The heating device 226 is located at the regenerated air inlet 224, and the rotary wheel 223 is located between the regenerated air inlet 224 and the regenerated air outlet 225.

[0045] After being dehumidified by the refrigeration dehumidifier 21, the air enters the rotary dehumidifier 22 through the gas pipe for deep dehumidification. The rotary wheel 223 is composed of a special ceramic fiber carrier and a desiccant (moisture-absorbing layer). The air entering through the dehumidification inlet 221 captures the moisture in the air through the rotation of the rotary wheel 223. The processing fan sends the dried air from the dehumidification outlet 222 through the gas pipe to the next process.

[0046] The rotary dehumidifier 22's rotor 223 is divided into a dehumidification zone and a regeneration zone. After absorbing moisture, the rotor 223 moves to the regeneration zone. At this time, regeneration air (warm air, air pressure > 500 Pa) supplied from the regeneration air inlet 224 drives the moisture out of the regeneration air outlet 225, reactivating the moisture-absorbing material and allowing the rotor 223 to continue working. The drive motor rotates the dehumidification rotor 8-18 times per hour, continuously repeating the moisture absorption and regeneration actions to provide dry air. The regeneration air can be heated using a heating device 226 (steam heater or electric heater). Thus, the clean compressed air after two continuous dehumidification processes is transformed into low-temperature dry air (T = 10℃, d...). p <5g / m 3 ).

[0047] The scheme is further optimized. The heat exchange pipeline 32 includes a heat-conducting layer 321 disposed on the inner wall of the delivery pipeline 31 and a heat exchange pipe 322 disposed within the heat-conducting layer 321.

[0048] The heat-conducting layer 321 is preferably a graphene brick layer, and the heat exchange pipe 322 is preferably a copper pipe. With excellent thermal conductivity, graphite can effectively improve the heat transfer efficiency within the zinc stripping condenser 3, providing an efficient solution for heating low-temperature gases. Furthermore, graphite itself possesses excellent corrosion resistance and high-temperature resistance, making it suitable for high-temperature and highly corrosive environments, effectively ensuring the service life of the zinc stripping condenser 3. After the low-temperature dry air is heated in the zinc stripping condenser 3 through indirect heat exchange, the air temperature increases significantly from 10℃ to 550℃; it can also lower the temperature within the zinc stripping condenser 3, thereby improving the zinc recovery rate.

[0049] Further optimization of the scheme also includes a blower 7, which is connected to the conveying pipeline 31 and the zinc removal reduction furnace 4 respectively, so that the heated dry air in the conveying pipeline 31 moves toward the zinc removal reduction furnace 4.

[0050] High-temperature, dry air enters the centrifugal blower and is then forced into the zinc stripping reduction furnace 4 at a pressure of 3500-5000 Pa, with an air volume of 1000 m³ / h. 3 / h, air temperature is 550℃, absolute humidity d p <5g / m 3High-temperature, dry air can not only reduce the fuel ratio in the reduction process, but also improve gas flow inside the furnace and increase the reaction rate.

[0051] This system has excellent dehumidification and heating effects. The high-temperature dry air generated is blown into the zinc removal and reduction furnace, which helps to improve the reduction efficiency in the furnace and enhance the zinc removal effect.

[0052] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A de-zincing waste heat recovery and reuse dehumidifying air blast system, characterized in that, The application relates to an air pre-treatment unit (1) for connecting with an air source and filtering and compressing air output by the air source to form clean compressed air; a dehumidification unit (2) connected with the air pre-treatment unit (1), the dehumidification unit (2) being used for dehumidifying the clean compressed air to form dry air; a dezinc condenser (3) comprising a conveying pipeline (31) and a heat exchange pipeline (32), the conveying pipeline (31) being connected with the dehumidification unit (2), the conveying pipeline (31) being used for connecting with a dezinc reduction furnace (4), and the heat exchange pipeline (32) being in contact with the conveying pipeline (31), wherein a heat exchange medium in the heat exchange pipeline (32) is used for heating the dry air in the conveying pipeline (31). The heat exchange pipeline (32) comprises a heat conduction layer (321) arranged on the inner wall of the conveying pipeline (31) and a heat exchange pipeline (322) arranged in the heat conduction layer (321). The air pre-treatment unit (1) comprises an air filter (11) and an air compressor (12), the air source is connected with the air filter (11), and the air filter (11) is connected with the air compressor (12). The air filter (11) comprises a filtered air inlet (111), a filtered air outlet (112) and a filter grid (113) arranged between the filtered air inlet (111) and the filtered air outlet (112).

2. The de-zincing waste heat recovery and reuse dehumidifying air blast system of claim 1, wherein: The air compressor (12) comprises a compressed air inlet (121), a compressed air outlet (122) and a compression screw (123) arranged between the compressed air inlet (121) and the compressed air outlet (122).

3. The de-zincing waste heat recovery and reuse dehumidified air blast system of claim 1, wherein: The dehumidification unit (2) comprises a refrigeration dehumidification machine (21) and a rotary dehumidification machine (22), the refrigeration dehumidification machine (21) is connected with the air compressor (12), and the rotary dehumidification machine (22) is connected with the refrigeration dehumidification machine (21).

4. The de-zincing waste heat recovery and reuse dehumidified air blast system of claim 3, wherein: The refrigeration dehumidification machine (21) comprises an evaporator (211), a condenser (212) and a fan (213).

5. The de-zincing waste heat recovery and reuse dehumidified air blast system of claim 3, wherein: The rotary dehumidification machine (22) comprises a dehumidification inlet (221), a dehumidification outlet (222) and a rotary wheel (223) arranged between the dehumidification inlet (221) and the dehumidification outlet (222), and the rotary wheel (223) is provided with a moisture absorption layer.

6. The de-zincing waste heat recovery and reuse dehumidified air blast system of claim 3, wherein: The application further comprises a compression refrigeration unit (5) connected with the refrigeration dehumidification machine (21) and a cooling water tower (6) connected with the compression refrigeration unit (5) and the refrigeration dehumidification machine (21) respectively.

7. The de-zincing waste heat recovery and reuse dehumidified air blast system of claim 6, wherein: The application further comprises a blower (7) connected with the conveying pipeline (31) and the dezinc reduction furnace (4) respectively, so that the heated dry air in the conveying pipeline (31) moves towards the dezinc reduction furnace (4).

8. The de-zincing waste heat recovery and reuse dehumidified air blast system of claim 6, wherein: ​ 9. The de-zincing waste heat recovery and reuse dehumidified air blast system of claim 6, wherein: ​ 10. The de-zincing waste heat recovery and reuse dehumidified air blast system of claim 1, wherein: ​

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