Device for efficiently eliminating white gas from factory chimneys and recovering heat
Through the composite technical route of condensation-reheat-heat recovery, combined with Ω-generator and thermal dehumidifier, the problem of poor elimination of white gas in factory chimneys is solved, efficient elimination and heat recovery are achieved, and energy utilization is improved.
Patent Information
- Application Number
- CN202420450459.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-08
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-03-08
AI Technical Summary
The prior art has problems such as high energy consumption, high cost and difficulty in effectively reducing gas temperature when eliminating white gases in factory chimneys, resulting in poor white gas elimination effect.
The composite technology route of condensation-reheat-heat recovery is adopted, and through multi-stage cooling and reheat technology, combined with Ω-generator and thermal dehumidifier, the gas is efficiently cooled and dehumidified, and the heat energy is recovered through the heat recovery heat treatment machine.
It realizes efficient elimination of white gas in factory chimneys, reduces gas temperature, increases unsaturation, avoids the formation of white gas, and recovers a large amount of heat energy, improving energy utilization.
Smart Images
Figure CN222718225U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of equipment for eliminating white gas from chimneys, in particular to a device for efficiently eliminating white gas from factory chimneys and recovering heat energy. Background Art
[0002] A large amount of saturated hot and humid gas generated during factory production is discharged from the chimney. The water vapor in the gas condenses into small water droplets when it meets the lower temperature external air, forming a fan-shaped smoke flow visible to the naked eye. A large number of small water droplets are scattered under the sunlight, forming a visual phenomenon of white gas, commonly known as "big white smoke".
[0003] At present, there are mainly the following methods for the treatment of this white gas worldwide:
[0004] 1. Direct heating technology:
[0005] In direct heating technologies, such as gas heating, there are problems such as increased pollutant emissions and high operating costs. Since the current goal of reheating technology development is to improve the gas diffusion effect, the design value of the exhaust temperature after heating is usually between 70 and 80°C. However, when the ambient temperature is low (about 15°C), "wet plume" will still occur. The higher the temperature of the saturated wet flue gas, the lower the ambient temperature and the greater the humidity, the more obvious the wet plume will be. The main disadvantage of this technology is that it requires a high-temperature heat source for heating, resulting in high energy consumption and high cost of use.
[0006] 2. Direct cooling technology:
[0007] This technology mainly reduces the gas temperature to condense and precipitate a large amount of water in the white gas, thereby avoiding the occurrence of "wet smoke phenomenon". This method can not only recover a large amount of condensed water, but also reduce the concentration of various pollutants such as smoke in the gas. At present, spray cooling and condenser heat exchange cooling technology are the main condensation technologies. However, the actual temperature reduction of this method is limited, especially when the ambient temperature is high, its cooling ability will be weakened, and it is difficult to reduce the temperature below 20°C. The main disadvantage of this technology is that the unit capacity demand is large, and the investment cost and operating expenses are high.
[0008] 3. Cooling and reheating technology:
[0009] Both the heating and cooling condensation technologies have certain limitations. By fully combining the characteristics of the two technologies, the adaptability of the white gas elimination environment can be expanded to a certain extent. The gas is first cooled by heat exchange with a cold source (circulating water, cold water, etc.), and part of the water in the flue gas is condensed. Then, the temperature is increased by heat exchange with a heat source (steam, high-temperature flue gas, etc.). When the temperature rises to a certain level, the flue gas is discharged into the air through the smoke exhaust pipe, which can effectively eliminate the white smoke. The main disadvantage of this technology is that it has a large demand for cold and heat sources, resulting in high energy consumption, high investment costs and high operating costs.
[0010] 4. Air mixing technology
[0011] This technology is a cooling or heating method, which only replaces the traditional medium with cold air and hot air to cool or heat the exhaust gas. However, this method adds a large amount of dry fresh air to the exhaust gas, which can effectively reduce the moisture content and relative humidity of the exhaust gas. Compared with the traditional single cooling or heating technology, it can have relatively low energy consumption, but it still requires cold source and heat source for heat exchange, and the investment cost and operating cost are relatively high.
[0012] In addition, the white gas contains a lot of heat energy, which cannot be used, resulting in a waste of energy. Therefore, a device for efficiently eliminating white gas from factory chimneys and recovering heat energy is proposed to solve the above problems. Utility Model Content
[0013] In view of the above existing technical problems, the utility model provides a device for efficiently eliminating white gas from factory chimneys and recovering heat energy, which is characterized by comprising a treatment box, an air counter-treatment machine, a thermal efficiency dehumidifier, a thermal efficiency desaturator, an Ω-generator, a heat recovery thermal efficiency treatment machine, a relay tank, and a water pump. The thermal efficiency dehumidifier is installed at the end of the treatment box, and the air counter-treatment machine is installed on both sides of the treatment box. The Ω-generator is installed in the treatment box, and the thermal efficiency desaturator is installed at the side of the Ω-generator in the treatment box. One end of the thermal efficiency desaturator is connected to the thermal efficiency dehumidifier, and the other end of the thermal efficiency desaturator is connected to the thermal efficiency dehumidifier through a water pump A. A heat recovery thermal efficiency treatment machine is arranged between the connection between the thermal efficiency desaturator and the thermal efficiency dehumidifier, and one end of the heat recovery thermal efficiency treatment machine is connected to the relay tank, and the other end of the heat recovery thermal efficiency treatment machine is connected to the relay tank through a water pump B.
[0014] The air inlet of the processing box is connected to the factory chimney.
[0015] The air outlet of the processing box is connected to the smoke exhaust pipe.
[0016] Furthermore, an electric air valve is installed on the factory chimney.
[0017] Furthermore, the location where the Ω-generator is installed in the processing box is located at the rear side of the thermal dehumidification dehydrator.
[0018] Furthermore, the treatment box is provided with a drain port for discharging water generated by gas condensation during the flue gas cooling process.
[0019] Beneficial effects of the utility model:
[0020] The utility model proposes a composite technical route of condensation-reheating-heat recovery, and adopts a solution of "coagulation dehydration + rotary dehydration + unsaturated accelerated discharge + heat recovery". This solution uses multi-stage cooling to significantly reduce the temperature of the white gas in the factory chimney, and adopts reheating technology. It uses closed-loop circulation technology to heat the outlet gas while cooling. Therefore, no new pollutants are generated in this process to increase the unsaturation of the gas so that it cannot form white gas when discharged. At the same time, a heat recovery system is used to use its heat for heat recovery as a production or living heat source. The recovered heat is stored in a relay tank, which can be used to preheat the factory boiler soft water system, or preheat the location where the production process needs to be heated, or used for heating the factory, thereby improving the utilization rate of recovered heat energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the overall structure connection of the device for efficiently eliminating white gas from factory chimneys and recovering heat energy according to the utility model;
[0022] Figure 2 It is a schematic diagram of the working process of the device for efficiently eliminating white gas from factory chimneys and recovering heat energy of the utility model;
[0023] Figure 3 This is a schematic diagram of the structure of the Ω-generator of the device for efficiently eliminating white gas from factory chimneys and recovering heat energy according to the utility model;
[0024] Figure 4 It is the gas water content-temperature change curve;
[0025] As shown in the figure: 1. Thermal efficiency dehumidifier, 2. Processing box, 3. Ω-generator, 4. Thermal efficiency desaturator, 5. Air hedge processor, 6. Heat recovery thermal efficiency processor, 7. Water pump A, 8. Relay tank, 9. Water pump B, 10. Factory chimney, 101. Electric air valve, 11. Smoke exhaust pipe. DETAILED DESCRIPTION
[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0029] Example 1
[0030] As shown in the figure, the factory chimney 10 is connected to the air inlet of the processing box 2, an electric air valve 101 is installed on the factory chimney 10, a thermal efficiency dehumidification and dehydration machine 1 is installed at the air inlet end of the processing box 2, air counter-treatment machines 5 are respectively installed on both sides of the processing box 2, an Ω-generator 3 is installed in the processing box 2, and a thermal efficiency desaturator 4 is installed at a position beside the Ω-generator 3 in the processing box 2. One end of the thermal efficiency desaturator 4 is connected to the thermal efficiency dehumidification and dehydration machine 1, and the other end of the thermal efficiency desaturator 4 is connected to the thermal efficiency dehumidification and dehydration machine 1 through a water pump A7. A heat recovery thermal effect treatment machine 6 is arranged between the thermal efficiency desaturator 4 and the thermal efficiency dehumidification and dehydration machine 1, one end of the heat recovery thermal effect treatment machine 6 is connected to a relay tank 8, and the other end of the heat recovery thermal effect treatment machine 6 is connected to the relay tank 8 through a water pump B9. A drain port is arranged on the processing box 2 for cooling the flue gas to discharge water generated by gas condensation.
[0031] Example 2
[0032] Start the electric air valve 101, the flue gas enters the processing box 2 through the factory chimney 10, and physically contacts the thermal dehumidification dehydrator 1 installed at the air inlet end of the processing box 2 to exchange energy. The exchanged gas will be cooled and condensed for the first time, and the generated condensed water will be discharged through the drain port set on the processing box 2.
[0033] The gas that has undergone the first cooling treatment enters the processing box 2, and is evenly mixed with the natural air of the air counter-processor 5 installed on both sides of the processing box 2. Due to the low outdoor temperature, the temperature will drop again after mixing with the gas, and some condensed water will be discharged from the drain port set on the processing box 2 again.
[0034] Next, these mixed gases enter the Ω-generator 3. The porous and multi-faceted structure of the Ω-generator 3 increases the gas collision specific surface area inside the treatment box 2, which can quickly capture the water molecules after the flue gas is cooled, thereby improving the dehumidification efficiency.
[0035] The mixed gas comes into physical contact with the thermal desaturator 4 at the outlet port of the treatment box 2. The temperature of the mixed gas will be increased and discharged through the exhaust pipe 11. In this process, the humidity of the exhaust gas is greatly reduced, thus avoiding the formation of white smoke plume from the exhaust gas.
[0036] The treated white gas is cooled at the thermal efficiency dehumidifier and dehydrator 1, and the heat medium in the circulation pipeline connected between the thermal efficiency dehumidifier and dehydrator 1 and the thermal efficiency desaturator 4 is heated, and the heated heat medium heats the gas at the thermal efficiency desaturator 4, and the heat medium is cooled at the same time. The heat exchange transfer is transmitted through the water pump A7. The heat medium in the pipeline of the water pump A7 is a closed cycle, and no secondary pollution will be generated. At the same time, the heat energy in the heat medium during the transfer process is recovered by the heat recovery thermal effect treatment machine 6, and the heat medium is further cooled, thereby improving the heat exchange efficiency. The heat recovery thermal effect treatment machine 6 transfers heat to the relay tank through the water pump B9, and the heat recovered in the heat recovery thermal effect treatment machine 6 is stored in the relay tank 8, which is convenient for the subsequent production or life heat utilization.
[0037] The heat transfer medium used by the water pump in the system is antifreeze. Antifreeze has high heat exchange efficiency, which improves the energy transfer efficiency of each thermal efficiency machine and improves the cooling and heating effects. The main heat energy exchange of the system adopts a closed circulation method to limit the use of antifreeze. There is no need to worry about winter antifreeze problems for antifreeze, and the pipes do not need to be insulated and heated, which increases the heat dissipation effect between the heat medium and the air, thereby achieving economical and efficient operation.
[0038] Use the gas moisture content-temperature curve to illustrate:
[0039] The gas moisture content-temperature change curve is shown in the figure below. The curve can be regarded as the dew point relationship. The white gas discharged by the factory always has white water vapor, that is, the emission state is on the upper right side of the curve. The gas enters the equipment at 70-80℃. First, it passes through the thermal dehumidification dehydrator 1 in the cooling section to cool the gas to 60-70℃. At this time, a large amount of condensed water is precipitated from the gas, reaching an oversaturated state. The gas moves downward to the left on the graph; then it enters the mixed air section, and the gas passes through the air counter-processor 5 to add a large amount of cold air, which increases the gas volume by 4-5 times and the temperature The temperature is further reduced by 5-10℃, while the gas volume is increased, the water content and relative humidity of the gas are reduced, and the gas moves to the left and downward on the graph again; the gas passes through the Ω-generator to intercept a large amount of condensed water again, and the water content drops again, causing the gas to move downward on the graph, so that the gas reaches the dew point or is lower than the dew point; the gas finally passes through the thermal efficiency desaturator 4 of the temperature rising section, causing the gas to shift to the right on the graph, so that the gas is on the right side of the curve, and the gas cannot reach the dew point. At this time, the exhaust gas no longer condenses and no small water droplets appear, so that the white gas of the exhaust gas is eliminated.
[0040] The heat recovery heat treatment machine 6 recovers the heat energy in the exhaust gas and uses it to produce medium-temperature hot water, and the heat energy can be retained in the relay tank 8. The recovered heat energy raises the temperature of 10 tons of water per hour from normal temperature (normal water temperature is around 15°C, and the lowest temperature in winter can reach 5°C) to above 60°C, which can save preheating energy consumption in production and life, and can greatly save the gas usage of boilers. It is estimated that the natural gas usage cost can be saved by about one million yuan per year.
[0041] The Ω-generator used in this application is a prior art device, such as Figure 3 As shown in the figure, the porous and multifaceted structure in the Ω generator is used to increase the specific surface area of gas collision inside the equipment, which can quickly capture water molecules after the flue gas is cooled, thereby improving the dehumidification and dehydration efficiency. The Ω-generator can quickly capture water molecules after the flue gas is cooled, which can meet the low temperature state in winter to eliminate white gas. The Ω-generator is an innovative product designed to improve the dehumidification effect in winter and effectively save energy in summer. Its main function is to quickly capture water molecules after the flue gas is cooled, thereby improving the dehumidification and dehydration efficiency.
[0042] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A device for efficiently eliminating white gas from factory chimneys and recovering heat energy, characterized by: It includes a treatment box, an air counter-treatment machine, a thermal efficiency dehumidifier and dehydrator, a thermal efficiency desaturator, an Ω-generator, a heat recovery thermal efficiency treatment machine, a relay tank, and a water pump. The thermal efficiency dehumidifier and dehydrator are installed at the end of the treatment box, and air counter-treatment machines are installed on both sides of the treatment box respectively. The Ω-generator is installed in the treatment box, and the thermal efficiency desaturator is installed at a position beside the Ω-generator in the treatment box. One end of the thermal efficiency desaturator is connected to the thermal efficiency dehumidifier and the other end of the thermal efficiency desaturator is connected to the thermal efficiency dehumidifier and dehydrator through water pump A. A heat recovery thermal efficiency treatment machine is arranged between the thermal efficiency desaturator and the thermal efficiency dehumidifier and dehydrator. One end of the heat recovery thermal efficiency treatment machine is connected to the relay tank, and the other end of the heat recovery thermal efficiency treatment machine is connected to the relay tank through water pump B.
2. The device for efficiently eliminating white gas from factory chimneys and recovering heat energy according to claim 1 is characterized in that The air inlet of the processing box is connected to the factory chimney.
3. The device for efficiently eliminating white gas from factory chimneys and recovering heat energy according to claim 1 is characterized in that The air outlet of the processing box is connected to the smoke exhaust pipe.
4. The device for efficiently eliminating white gas from factory chimneys and recovering heat energy according to claim 2 is characterized in that An electric air valve is installed on the factory chimney.