A wet electrostatic precipitation system for removing deposited particles by thermoelectric refrigeration and simultaneously recovering water heat

Abstract

A wet electrostatic precipitator system for removing deposited particles and synergistically recovering water heat via thermoelectric cooling includes a dust removal mechanism for flue gas ionization, dust removal, flue gas waste heat recovery, and moisture removal; a thermoelectric cooling mechanism for simultaneously generating cooling and heating, wherein the cooling is supplied to the dust removal mechanism and the heating is stored in a heat storage tank; a high-voltage power supply mechanism for providing high-voltage power to the dust removal mechanism; and a solar low-voltage power supply mechanism for providing low-voltage DC power to the thermoelectric cooling mechanism. The cooling generated at the cold end of the thermoelectric element causes partial condensation of the flue gas, forming uniform and dense droplets on the surface of the collecting electrode. The droplets remove the particles deposited on the surface of the collecting electrode. Some condensable gaseous components in the flue gas are condensed and collected under the thermoelectric cooling effect, while the sensible heat and latent heat of condensation of the flue gas are transferred to the heat storage tank. This invention has the advantages of good removal effect of deposited particles, flue gas heat recovery, and reduced carbon emissions.

Description

Technical Field

[0001] This invention belongs to the field of dust removal and flue gas purification technology, specifically relating to a wet electrostatic dust removal system that uses thermoelectric cooling to remove deposited particles and synergistically recover water heat. Background Technology

[0002] Solid dust, SO3 droplets, and condensable gases emitted from industries such as energy and chemicals contribute to severe air pollution. Developing synergistic purification technologies for multiple pollutants is crucial for mitigating heavy pollution episodes and improving public health. Furthermore, the scarcity of available water resources is a significant challenge facing domestic industries, making the development of water-saving technologies and the realization of water resource recycling essential.

[0003] Wet electrostatic precipitators are widely used as the final stage in flue gas purification systems to remove fine particulate matter and droplets from flue gas after wet desulfurization. The dust removal efficiency of wet electrostatic precipitators is significantly affected by the particles deposited on the collecting electrode surface. The more particles deposited, the lower the dust removal efficiency. Wet electrostatic precipitators remove deposited particles by spraying water onto the collecting electrode surface. However, water is often unevenly distributed on the electrode surface, resulting in localized dry spots that affect dust removal efficiency. Secondly, wet electrostatic precipitators consume a large amount of water during operation, further contributing to water scarcity. Furthermore, frequent spark discharges often occur during water spraying, leading to equipment instability and reduced dust removal efficiency.

[0004] Patent application CN117753559A discloses a wet electrostatic precipitator, including a dust collection box and further comprising: two anode belts vertically and symmetrically rotated inside the dust collection box; a cathode rod vertically installed at the top of the dust collection box, with an exhaust slot at the top of the dust collection box; a synchronous rotation assembly installed outside the dust collection box, used to simultaneously rotate the two anode belts in opposite directions; and two cleaning assemblies symmetrically arranged, used to clean the surface of the anode belts. This device allows the cross tube to rotate when dust-laden gas enters the dust collection box, thereby ensuring uniform distribution of the dust-laden gas inside the dust collection box. Furthermore, the continuous rotation of the anode belts allows for simultaneous renewal of the anode plates during gas cleaning, improving the adsorption effect of the anode plates on dust in the dust-laden gas. This technical solution utilizes the mechanical movement of the anode (dust collection electrode) to remove dust deposited on the anode. However, this solution has a complex mechanical structure, high regular maintenance costs, and requires external power to drive the anode rotation, increasing energy consumption. Furthermore, the scheme lacks the ability to recover the large amounts of heat and moisture contained in the flue gas.

[0005] Patent application CN220346157U discloses a wet electrostatic precipitator, including a dust removal assembly. The dust removal assembly includes a housing, an air inlet hood, an air inlet pipe, an air outlet pipe, a mounting plate, a discharge electrode, a dust collection electrode, a water pump, a water supply pipe, a connecting pipe, a water spray pipe, a nozzle, a filter plate, a rotating shaft, a rotating plate, a brush, a motor, a driving bevel gear, a driven bevel gear, a dust collection trough, and a collection hopper. The left side wall of the air inlet hood is connected to the air inlet pipe, and the right side wall of the housing is connected to the air outlet pipe. During operation, the flue gas to be treated is introduced into the housing through the inlet duct and inlet hood. The gas between the discharge electrode and the collecting electrode undergoes thorough ionization, filling the housing with positively and negatively charged ions. Dust particles in the flue gas collide with these ions and become charged as they pass between the discharge and collecting electrodes. These charged dust particles then reach the collecting electrode and are captured. A water pump draws external water, which is then sprayed through nozzles to wash the dust particles from the collecting electrode surface into the collection hopper, achieving the dust removal effect. However, this method requires a large amount of water to remove dust deposited on the collecting electrode surface, and suffers from uneven distribution of the water mist from the nozzles on the collecting electrode surface, resulting in incomplete dust removal. Furthermore, this method lacks the function of recovering heat and moisture from the flue gas. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention aims to provide a wet electrostatic precipitator system that uses thermoelectric cooling to remove deposited particles and synergistically recover water heat. The system introduces cooling energy into a novel collecting electrode via a thermoelectric cooling mechanism, causing uniformly distributed condensate droplets to form on the electrode surface. This achieves self-purification of dust on the electrode surface and recovery of moisture and condensable components from the flue gas. By combining a heat storage medium (water) with the thermoelectric cooling mechanism, heat from the flue gas is recovered and stored in a heat storage tank, achieving flue gas heat recovery. Finally, a solar photovoltaic power generation system provides energy for thermoelectric cooling or high-voltage discharge, thereby reducing carbon emissions.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0008] A wet electrostatic precipitator system for removing deposited particles using thermoelectric cooling and synergistically recovering hydrothermal heat includes:

[0009] Dust removal unit 21 is used for flue gas ionization, dust removal, flue gas waste heat recovery and moisture removal;

[0010] Thermoelectric refrigeration mechanism is used to generate both cold and heat simultaneously, wherein the cold energy is supplied to the dust removal mechanism 21 and the heat is stored in the heat storage tank 6;

[0011] High-voltage power supply mechanism 5 is used to provide high-voltage power supply to dust removal mechanism 21;

[0012] The solar low-voltage power supply unit 22 is used to provide low-voltage DC power to the thermoelectric refrigeration unit.

[0013] The dust removal mechanism 21 includes a dust removal chamber 23. One end of the dust removal chamber 23 has a dust removal mechanism inlet 2, and the other end has a dust removal mechanism outlet 7. Inside the dust removal chamber 23, along the flue gas flow direction from the dust removal mechanism inlet 2 to the dust removal mechanism outlet 7, a discharge electrode 10 and a collection electrode 3 are arranged in sequence. A repulsion electrode 12 is also arranged on one side of the collection electrode 3, and the repulsion electrode 12 is close to the dust removal mechanism outlet 7. A water and dust collection trough 4 is arranged at the bottom of the dust removal chamber 23.

[0014] The thermoelectric refrigeration mechanism includes a distributed thermoelectric refrigeration mechanism 171 arranged inside the collecting electrode 3 of the dust removal mechanism 21 or a centralized thermoelectric refrigeration mechanism 172 arranged outside the dust removal mechanism 21.

[0015] The high-voltage power supply mechanism 5 includes a high-voltage output terminal and a grounding terminal. The high-voltage output terminal of the high-voltage power supply mechanism 5 is connected to the discharge electrode 10 and the repulsion electrode 12 respectively, and the grounding terminal of the high-voltage power supply mechanism 5 is connected to the collection electrode 3.

[0016] Alternatively, the high-voltage power supply mechanism 5 can convert low voltage into high voltage through a boost circuit to supply power to the dust removal mechanism 21.

[0017] The solar low-voltage power supply mechanism 22 includes a solar photovoltaic panel 8 and a battery 9, which generates low-voltage DC power to provide low-voltage DC power to the thermoelectric cooling mechanism.

[0018] The decentralized thermoelectric cooling mechanism 171 includes a water-cooled plate 15 located inside the collecting electrode 3. The water-cooled plate 15 has thermoelectric elements 16 and collecting plates 14 symmetrically distributed from the inside to the outside. The hot end of the thermoelectric element 16 is in contact with the water-cooled plate 15, and the cold end of the thermoelectric element 16 is in contact with the collecting plate 14. The inlet of the water-cooled plate 15 is connected to the heat storage medium tank 1, and the outlet of the water-cooled plate 15 is connected to the heat storage tank 6. The thermoelectric element 16 of the decentralized thermoelectric cooling mechanism 171 is connected to the power output terminal of the solar low-voltage power supply mechanism 22.

[0019] The centralized thermoelectric cooling mechanism 172 includes a cavity, with a thermoelectric element 16 disposed inside the cavity. Water-cooled plates and insulation layers 18 are symmetrically distributed on both sides of the thermoelectric element 16 from the inside out. The water-cooled plates include a cold-end water-cooled plate 19 on one side of the thermoelectric element 16 and a hot-end water-cooled plate 20 on the other side of the thermoelectric element 16. The inlet of the hot-end water-cooled plate 20 is connected to the heat storage medium tank 1, and the outlet of the hot-end water-cooled plate 20 is connected to the heat storage tank 6. The heat storage tank 6 and the heat storage medium tank 1 are connected to form a circulation. The collecting electrode 3 inside the dust removal mechanism 21 includes a water-cooled plate 15 on the inner side and collecting plates 14 distributed on both sides of the water-cooled plate 15. The water-cooled plate 15 and the cold-end water-cooled plate 19 are interconnected. Cooling water circulates in the cold-end water-cooled plate 19 and the water-cooled plate 15. The thermoelectric element 16 of the centralized thermoelectric cooling mechanism 172 is connected to the power output terminal of the solar low-voltage power supply mechanism 22.

[0020] The water-cooled plate 15 contains a channel, and a water-cooled plate inlet 11 and a water-cooled plate outlet 13 are respectively opened on the water-cooled plate 15. The water-cooled plate inlet 11 is connected to the outlet of the heat storage medium tank 1, and the water-cooled plate outlet 13 is connected to the inlet of the heat storage tank 6.

[0021] The water-cooled plate 15, the thermoelectric element 16, and the collecting plate 14 are tightly connected by a thermally conductive material; the collecting plate 14 is a flat plate or a finned plate with enhanced heat exchange.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) Excellent removal effect of deposited particles. Traditional wet electrostatic precipitators remove deposited particles from the surface of the collecting electrode by spraying water from nozzles. However, this method suffers from uneven water distribution on the collecting electrode surface and unstable particle removal effect. The thermoelectric cooling mechanism and novel collecting electrode 3 of this invention can promote the condensation of water vapor and condensable components in the flue gas on the surface of the collecting electrode 3. The condensate droplets are evenly and finely distributed, and the deposited particles are removed with the movement of the droplets, resulting in a good removal effect.

[0024] 2) Recovery of condensable components in flue gas to avoid air pollution, and recovery of moisture in flue gas. The present invention uses the cold surface (enhanced heat exchange surface) of the collecting electrode 3 to conduct convective heat exchange with the flue gas, which can promote the condensation of water vapor in the flue gas, and can also promote the condensation of condensable components such as SO3, preventing them from being emitted into the atmosphere and causing pollution.

[0025] 3) Recovery of waste heat from flue gas. In existing technologies, the temperature of flue gas in wet electrostatic precipitators is generally between 40 and 50°C, making heat recovery difficult, resulting in low energy quality, and the flue gas is in a supersaturated state within the wet electrostatic precipitator. The cold end of the thermoelectric element 16 in this invention can effectively recover both sensible and latent heat from the flue gas, resulting in a significantly higher output temperature from the hot end of the thermoelectric element 16 compared to the flue gas temperature. This leads to higher quality recovered heat and easier downstream waste heat utilization.

[0026] 4) Avoid spark discharge caused by water spraying. The condensable components in the flue gas condense into uniform and dense droplets on the surface of the collecting electrode 3, avoiding the problem of large water droplet splashing caused by water spraying. Therefore, frequent spark discharge is not generated, which improves the operational stability of the wet electrostatic precipitator system.

[0027] In summary, this invention constructs an electrostatic dust removal system that integrates thermoelectric cooling with a novel collecting electrode, achieving self-purification of the electrostatic dust removal collecting electrode (eliminating the need for water spraying and scraping facilities in traditional electrostatic dust removal systems) and synergistically recovering condensable components (including moisture) and heat from flue gas. It has the advantages of efficiently removing deposited particles from the collecting electrode plate, stable operation, and water and energy saving. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the wet electrostatic dust removal system of the present invention, which employs a decentralized thermoelectric refrigeration mechanism 171.

[0029] Figure 2 This is a schematic diagram of the internal structure of the dust removal mechanism 21 of the present invention.

[0030] Figure 3 This is a schematic diagram of the internal structure of the collecting electrode 3 in the wet electrostatic dust removal system of the present invention, which employs a decentralized thermoelectric refrigeration mechanism 171.

[0031] Figure 4 This is a schematic diagram of the structure of the water-cooled plate 5 inside the collecting electrode 3 in the wet electrostatic dust removal system of the present invention, which uses a decentralized thermoelectric refrigeration mechanism 171.

[0032] Figure 5 This is a schematic diagram of the wet electrostatic dust removal system of the present invention, which uses a centralized thermoelectric refrigeration mechanism 172.

[0033] Figure 6 This is a schematic diagram of the centralized thermoelectric refrigeration mechanism 172 of the present invention.

[0034] Figure 7 This is a schematic diagram of the internal structure of the collecting electrode 3 in the wet electrostatic dust removal system of the centralized thermoelectric refrigeration mechanism 172 of the present invention.

[0035] In the diagram: 1. Thermal storage medium tank; 2. Dust collector inlet; 3. Collecting electrode; 4. Water and dust collection trough; 5. High-voltage power supply mechanism; 6. Thermal storage tank; 7. Dust collector outlet; 8. Solar photovoltaic panel; 9. Battery; 10. Discharge electrode; 11. Water-cooled plate inlet; 12. Repulsion electrode; 13. Water-cooled plate outlet; 14. Collecting plate; 15. Water-cooled plate; 16. Thermoelectric element; 171. Distributed thermoelectric refrigeration mechanism; 172. Centralized thermoelectric refrigeration mechanism; 18. Insulation layer; 19. Cold-end water-cooled plate; 20. Hot-end water-cooled plate; 21. Dust removal mechanism; 22. Solar low-voltage power supply mechanism; 23. Dust removal chamber. Detailed Implementation

[0036] The invention will now be described in further detail with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the invention in any way.

[0037] This invention provides a wet electrostatic precipitator system that removes particles deposited on the surface of the collecting electrode by utilizing condensable gaseous components carried by the flue gas itself and recovers and stores heat in the flue gas.

[0038] A wet electrostatic dust removal system that uses thermoelectric cooling to remove deposited particles and synergistically recovers water heat includes a dust removal mechanism 21, a thermoelectric cooling mechanism, a high-voltage power supply mechanism 5, and a solar low-voltage power supply mechanism 22.

[0039] Dust removal unit 21 is used for flue gas ionization, dust removal, flue gas waste heat recovery and moisture removal;

[0040] Thermoelectric refrigeration mechanism is used to generate both cold and heat simultaneously, wherein the cold energy is supplied to the dust removal mechanism 21 and the heat is stored in the heat storage tank 6;

[0041] High-voltage power supply mechanism 5 is used to provide high-voltage power supply to dust removal mechanism 21;

[0042] The solar low-voltage power supply unit 22 is used to provide low-voltage DC power to the thermoelectric refrigeration unit.

[0043] The dust removal mechanism 21 includes a dust removal chamber 23. One end of the dust removal chamber 23 has a dust removal mechanism inlet 2, and the other end has a dust removal mechanism outlet 7. Inside the dust removal chamber 23, along the flue gas flow direction from the dust removal mechanism inlet 2 to the dust removal mechanism outlet 7, a discharge electrode 10 and a collection electrode 3 are arranged in sequence. A repulsion electrode 12 is also arranged on one side of the collection electrode 3, and the repulsion electrode 12 is close to the dust removal mechanism outlet 7. A water and dust collection trough 4 is arranged at the bottom of the dust removal chamber 23.

[0044] The discharge electrode 10 is located upstream of the collecting electrode 3 and the repulsion electrode 12, generating an ion wind from the inlet to the outlet for use under conditions without a fan. The collecting electrode 3 and the repulsion electrode 12 are arranged at intervals.

[0045] The thermoelectric refrigeration mechanism includes a distributed thermoelectric refrigeration mechanism 171 arranged inside the collecting electrode 3 of the dust removal mechanism 21 or a centralized thermoelectric refrigeration mechanism 172 arranged outside the dust removal mechanism 21.

[0046] The thermoelectric refrigeration mechanism also includes a cold water storage tank, a pump, pipes connecting to the water-cooled plate 15 in the collecting electrode 3, and a heat storage tank 6.

[0047] The high-voltage power supply mechanism 5 includes a high-voltage output terminal and a grounding terminal. The high-voltage output terminal of the high-voltage power supply mechanism 5 is connected to the discharge electrode 10 and the repulsion electrode 12 respectively, and the grounding terminal of the high-voltage power supply mechanism 5 is connected to the collection electrode 3.

[0048] Alternatively, the high-voltage power supply mechanism 5 can convert low voltage into high voltage through a boost circuit to supply power to the dust removal mechanism 21.

[0049] The solar low-voltage power supply mechanism 22 includes a solar photovoltaic panel 8 and a battery 9, which generates low-voltage DC power to provide low-voltage DC power to the thermoelectric cooling mechanism.

[0050] The collecting electrode 3 can be formed by a sandwich structure consisting of a thermoelectric element 16, a heat dissipation element at the hot end of the thermoelectric cooling mechanism, and a collecting plate 14, forming a distributed thermoelectric cooling mechanism 171, which is arranged inside the dust removal mechanism 21; specifically:

[0051] The decentralized thermoelectric cooling mechanism 171, arranged inside the collecting electrode 3 of the dust removal mechanism 21, includes a water-cooled plate 15 located on the inner side. The water-cooled plate 15 has thermoelectric elements 16 and collecting plates 14 symmetrically distributed from the inside to the outside. The hot end of the thermoelectric element 16 is in contact with the water-cooled plate 15, and the cold end of the thermoelectric element 16 is in contact with the collecting plate 14. The water-cooled plate 15 contains a channel, and a water-cooled plate inlet 11 and a water-cooled plate outlet 13 are respectively opened on the water-cooled plate 15. The water-cooled plate inlet 11 of the water-cooled plate 15 is connected to the outlet of the heat storage medium tank 1, and the water-cooled plate outlet 13 of the water-cooled plate 15 is connected to the inlet of the heat storage tank 6. The heat storage medium in the heat storage medium tank 1 flows into the water-cooled plate 15, transferring the heat of the thermoelectric element 16 to the heat storage tank 6. The thermoelectric element 16 of the decentralized thermoelectric cooling mechanism 171 is connected to the power output terminal of the solar low-voltage power supply mechanism 22.

[0052] The water-cooled plate 15, the thermoelectric element 16, and the collecting plate 14 are tightly connected by a heat-conducting material.

[0053] The thermoelectric element 16 can be integrated with the hot-end heat dissipation structure and the cold-end heat dissipation structure to form a centralized thermoelectric cooling mechanism 172, which is centrally arranged outside the dust removal mechanism 21. The heat generated by the element is introduced into the heat storage tank 6, and the cold energy generated by the element is introduced into the collecting electrode 3 of the dust removal mechanism 21 through a fluid medium; specifically:

[0054] The centralized thermoelectric cooling mechanism 172, arranged outside the dust removal mechanism 21, includes a cavity. A thermoelectric element 16 is disposed inside the cavity. Water-cooled plates and insulation layers 18 are symmetrically distributed on both sides of the thermoelectric element 16 from the inside out. The water-cooled plates include a cold-end water-cooled plate 19 on one side of the thermoelectric element 16 and a hot-end water-cooled plate 20 on the other side. The inlet of the hot-end water-cooled plate 20 is connected to the heat storage medium tank 1, and the outlet of the hot-end water-cooled plate 20 is connected to the heat storage tank 6. The heat storage tank 6 and the heat storage medium tank 1 are connected to form a circulation. The heat storage medium in the heat storage medium tank 1 flows... The heat is absorbed by the hot end of the thermoelectric element 16 and then flows into the heat storage tank 6. After the heat is transferred to the heat storage tank 6, it flows into the heat storage medium tank 1. The collecting electrode 3 inside the dust removal mechanism includes a water-cooled plate 15 located on the inner side and collecting plates 14 distributed on both sides of the water-cooled plate 15. The water-cooled plate 15 is connected to the cold end water-cooled plate 19. Cooling water circulates in the cold end water-cooled plate 19 and the water-cooled plate 15 to provide cooling for the collecting electrode 3. The thermoelectric element 16 of the centralized thermoelectric cooling mechanism 172 is connected to the power output terminal of the solar low-voltage power supply mechanism 22.

[0055] The heat generated at the hot end of the thermoelectric refrigeration mechanism is transferred to the heat storage tank 6 through a fluid medium.

[0056] The heat in the heat storage tank 6 of the thermoelectric refrigeration mechanism can be transferred to the phase change heat storage material.

[0057] The collecting plate 14 can be made into a flat plate or an extended surface structure (finned plate) to enhance condensation heat transfer.

[0058] The collecting electrode 3 has an integrated heat exchange structure inside, which reduces the surface temperature of the collecting electrode 3 to below the flue gas saturation temperature.

[0059] The water and dust collection tank 4 stores and collects dust-laden droplets that have fallen off the surface of the electrode 3.

[0060] The wet electrostatic precipitator system provided by this invention, which uses thermoelectric cooling to remove deposited particles and synergistically recovers water heat, can be used to remove particulate matter and condensable components from flue gas emitted by industries such as energy and chemical engineering.

[0061] Example 1:

[0062] like Figure 1 As shown, this embodiment of the invention provides a wet electrostatic dust removal system consisting of a dust removal mechanism 21, a high-voltage power supply mechanism 5, a solar low-voltage power supply mechanism 22, and a decentralized thermoelectric refrigeration mechanism 171.

[0063] like Figure 2As shown, the dust removal mechanism 21 includes a discharge electrode 10, a repulsion electrode 12, and a collection electrode 3. A water and dust collection trough 4 is provided at the bottom of the dust removal mechanism 21. The discharge electrode 10 is located upstream of the flue gas flow direction, while the collection electrode 3 and the repulsion electrode 12 are located downstream of the flue gas flow direction, which facilitates the generation of ion wind. The high-voltage power supply mechanism 5 has its high-voltage end connected to the discharge electrode 10 and the repulsion electrode 12, and its low-voltage end connected to the collection electrode 3.

[0064] like Figures 3-4 As shown, the collecting electrode 3 of the dust removal mechanism 21 has a multi-layer sandwich structure, with a water-cooled plate 15 at the innermost layer. Thermoelectric elements 16 and the collecting plate 14 are symmetrically distributed from the inside out. Each layer of components is tightly connected by a thermally conductive material (thermal grease). The hot and cold ends of the thermoelectric elements 16 are respectively attached to the collecting plate 14 and the water-cooled plate 15. The water-cooled plate 15 contains channels, and a water supply mechanism (heat storage medium tank 1) pumps room-temperature water into the water-cooled plate inlet 11 of the water-cooled plate 15. Water that has absorbed heat from the hot and cold ends of the thermoelectric elements flows out from the water-cooled plate 15. The water flows out of the outlet 13 of the water-cooled plate and into the heat storage mechanism (heat storage tank 6); the fluid passes through the water-cooled plate 15 to remove the heat from the hot end of the thermoelectric element 16; the collecting plate 14 removes the cold energy of the thermoelectric element 16, causing the flue gas adjacent to the collecting electrode 3 to condense and remove the dust deposited on the surface of the collecting plate 14; the collecting plate 14 outside the collecting electrode 3 can be a flat plate or a finned plate with enhanced heat exchange; the hot water in the heat storage tank 6 can be directly supplied to other processes that require heating or the heat of the hot water can be transferred to the phase change material through a low-temperature phase change heat storage process. The solar low-voltage power supply mechanism 22 provides low-voltage DC power to the thermoelectric element 16.

[0065] Example 2:

[0066] like Figure 5 As shown, this embodiment of the invention provides a wet electrostatic dust removal system consisting of a centralized thermoelectric refrigeration unit 172, a solar low-voltage power supply unit 22, a high-voltage power supply unit 5, and a dust removal unit 21.

[0067] like Figure 6 As shown, the core components of the centralized thermoelectric cooling mechanism 172 include an inner thermoelectric element 16, water-cooled plates (cold-end water-cooled plate 19 and hot-end water-cooled plate 20) tightly attached to the hot and cold ends of the thermoelectric element 16, and an insulation layer 18 on the outer side of the water-cooled plates. Cooling water in the cold-end water-cooled plate 19, which is in contact with the cold end of the thermoelectric element 16, and water-cooled plate 15 in the collecting electrode 3 of the dust removal mechanism 21 form a cold water circulation. Water in the hot-end water-cooled plate 20, which is in contact with the hot end of the thermoelectric element 16, and water in the heat storage medium tank 1 and the heat storage tank 6 form a hot water circulation. The heat from the hot water in the heat storage tank 6 can be used to heat or transfer to the phase change heat storage material. A low-voltage solar power supply mechanism 22 provides low-voltage DC power to the centralized thermoelectric cooling mechanism 172. A high-voltage power supply mechanism 5 provides high-voltage power to the dust removal mechanism 21.

[0068] like Figure 7 As shown, the dust removal mechanism 21's collecting electrode 3 includes an inner water-cooled plate 15 and an outer collecting plate 14. The fluid flowing inside the water-cooled plate 15 originates from the cold water output from the cold end (cold end water-cooled plate 19) of the thermoelectric refrigeration system. The collecting plate 14 can be a flat plate or a finned plate with enhanced heat exchange.

[0069] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A wet electrostatic precipitator system for removing deposited particles using thermoelectric cooling and synergistically recovering hydrothermal heat, characterized in that, include: Dust removal mechanism (21) is used for flue gas ionization, dust removal, flue gas waste heat recovery and moisture removal; Thermoelectric refrigeration mechanism is used to generate both cold and heat simultaneously, wherein the cold is supplied to the dust removal mechanism (21) and the heat is stored in the heat storage tank (6); High-voltage power supply mechanism (5) is used to provide high-voltage power supply to the dust removal mechanism (21); A solar low-voltage power supply mechanism (22) is used to provide low-voltage DC power to a thermoelectric refrigeration mechanism; The thermoelectric refrigeration mechanism includes a decentralized thermoelectric refrigeration mechanism (171) arranged inside the collecting electrode (3) of the dust removal mechanism (21); The decentralized thermoelectric cooling mechanism (171) includes a water-cooled plate (15) located inside the collecting electrode (3). The water-cooled plate (15) has thermoelectric elements (16) and a collecting plate (14) symmetrically distributed from the inside to the outside. The hot end of the thermoelectric element (16) is in contact with the water-cooled plate (15), and the cold end of the thermoelectric element (16) is in contact with the collecting plate (14). The inlet of the water-cooled plate (15) is connected to the heat storage medium tank (1), and the outlet of the water-cooled plate (15) is connected to the heat storage tank (6). The thermoelectric element (16) of the decentralized thermoelectric cooling mechanism (171) is connected to the power output terminal of the solar low-voltage power supply mechanism (22).

2. A wet electrostatic precipitator system for removing deposited particles using thermoelectric cooling and synergistically recovering water heat, characterized in that, include: Dust removal mechanism (21) is used for flue gas ionization, dust removal, flue gas waste heat recovery and moisture removal; Thermoelectric refrigeration mechanism is used to generate both cold and heat simultaneously, wherein the cold is supplied to the dust removal mechanism (21) and the heat is stored in the heat storage tank (6); High-voltage power supply mechanism (5) is used to provide high-voltage power supply to the dust removal mechanism (21); A solar low-voltage power supply mechanism (22) is used to provide low-voltage DC power to a thermoelectric refrigeration mechanism; The thermoelectric refrigeration mechanism includes a centralized thermoelectric refrigeration mechanism (172) arranged outside the dust removal mechanism (21); The centralized thermoelectric refrigeration mechanism (172) includes a cavity, on the inside of which a thermoelectric element (16) is disposed. Water-cooled plates and insulation layers (18) are symmetrically distributed on both sides of the thermoelectric element (16) from the inside out. The water-cooled plates include a cold-end water-cooled plate (19) on one side of the thermoelectric element (16) and a hot-end water-cooled plate (20) on the other side of the thermoelectric element (16). The inlet of the hot-end water-cooled plate (20) is connected to the heat storage medium tank (1), and the outlet of the hot-end water-cooled plate (20) is connected to the heat storage tank (6). (6) It is connected to the heat storage medium tank (1) to form a circulation; the collecting electrode (3) inside the dust removal mechanism (21) includes a water-cooled plate (15) located on the inner side and a collecting plate (14) distributed on both sides of the water-cooled plate (15). The water-cooled plate (15) is connected to the cold end water-cooled plate (19). The cooling water circulates in the cold end water-cooled plate (19) and in the water-cooled plate (15). The thermoelectric element (16) of the centralized thermoelectric refrigeration mechanism (172) is connected to the power output end of the solar low-voltage power supply mechanism (22).

3. A wet electrostatic precipitator system for removing deposited particles and synergistically recovering hydrothermal heat using thermoelectric refrigeration as described in claim 1 or 2, characterized in that, The dust removal mechanism (21) includes a dust removal chamber (23), with a dust removal mechanism inlet (2) at one end and a dust removal mechanism outlet (7) at the other end. Inside the dust removal chamber (23), along the flue gas flow direction from the dust removal mechanism inlet (2) to the dust removal mechanism outlet (7), a discharge electrode (10) and a collection electrode (3) are arranged in sequence. A repulsion electrode (12) is also arranged on one side of the collection electrode (3), and the repulsion electrode (12) is close to the dust removal mechanism outlet (7). A water and dust collection trough (4) is arranged at the bottom of the dust removal chamber (23).

4. A wet electrostatic precipitator system for removing deposited particles and synergistically recovering hydrothermal heat using thermoelectric refrigeration as described in claim 1 or 2, characterized in that, The high-voltage power supply mechanism (5) includes a high-voltage output terminal and a grounding terminal. The high-voltage output terminal of the high-voltage power supply mechanism (5) is connected to the discharge electrode (10) and the repulsion electrode (12) respectively, and the grounding terminal of the high-voltage power supply mechanism (5) is connected to the collection electrode (3). Alternatively, the high-voltage power supply mechanism (5) can convert low voltage into high voltage through a boost circuit to supply power to the dust removal mechanism (21).

5. A wet electrostatic precipitator system for removing deposited particles and synergistically recovering hydrothermal heat using thermoelectric refrigeration as described in claim 1 or 2, characterized in that, The solar low-voltage power supply mechanism (22) includes a solar photovoltaic panel (8) and a battery (9) to generate low-voltage DC power and provide low-voltage DC power to the thermoelectric cooling mechanism.

6. The wet electrostatic precipitator system for removing deposited particles and synergistically recovering hydrothermal heat using thermoelectric refrigeration according to claim 1, characterized in that, The water-cooled plate (15) contains a channel, and a water-cooled plate inlet (11) and a water-cooled plate outlet (13) are respectively opened on the water-cooled plate (15). The water-cooled plate inlet (11) is connected to the outlet of the heat storage medium tank (1), and the water-cooled plate outlet (13) is connected to the inlet of the heat storage tank (6).

7. A wet electrostatic precipitator system for removing deposited particles and synergistically recovering hydrothermal heat using thermoelectric refrigeration as described in claim 1 or 2, characterized in that, The water-cooled plate (15), the thermoelectric element (16), and the collecting plate (14) are tightly connected by a heat-conducting material; the collecting plate (14) is a flat plate or a finned plate with enhanced heat exchange.

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