Thermal power plant boiler waste heat recycling device

Abstract

The utility model provides a heat-engine plant boiler waste heat recycling device, which relates to the technical field of boiler waste heat recycling, and comprises a first recycling box, an air inlet pipe mounted at the top of the first recycling box, a connecting pipe head mounted at the outer end of the air inlet pipe, and a second recycling box arranged on one side of the outer end of the first recycling box, and the heat exchange assembly is arranged in the first recycling box and the second recycling box and comprises a heat exchange pipe, a heat dissipation plate, a fixing sleeve head, a connecting pipe and a water inlet pipe. According to the heat-engine plant boiler waste heat recycling device, waste heat generated by the boiler is recycled through the heat exchange assembly, after water is heated, hot water can be provided for a bath room of a plant area, workers can conveniently take a bath, resources are saved, and meanwhile pollution caused by the fact that waste heat is discharged into the atmospheric environment along with smoke can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of boiler waste heat recovery and utilization technology, specifically a waste heat recovery and utilization device for thermal power plant boilers. Background Technology

[0002] A thermal power plant boiler is an energy conversion device. The energy input to the boiler includes the chemical energy of the fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. The original meaning of "boiler" refers to a water-filled container heated over a fire, while "furnace" refers to the place where fuel is burned. A boiler consists of two main parts: the boiler and the furnace. The hot water or steam produced in the boiler can directly provide the heat energy needed for industrial production and daily life. It can also be converted into mechanical energy through a steam power unit, or further converted into electrical energy through a generator. Boilers that provide hot water are called hot water boilers, mainly used for domestic purposes, with some applications in industrial production. Currently, when thermal power plant boilers are in use, they generate a large amount of waste heat that is discharged into the atmosphere with the flue gas, causing an increase in atmospheric temperature and polluting the air environment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a waste heat recovery and utilization device for boilers in thermal power plants. The waste heat generated by the boiler is recovered and reused through heat exchange components. After heating the water, it can provide hot water for the shower room in the plant area, which is convenient for workers to take a shower. At the same time, it saves resources and avoids the waste heat being discharged into the atmosphere with the flue gas, causing pollution.

[0004] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0005] A waste heat recovery and utilization device for a thermal power plant boiler includes: a first recovery box, an air inlet pipe installed on the top of the first recovery box, a connecting pipe head installed at the outer end of the air inlet pipe, a second recovery box disposed on one side of the outer end of the first recovery box, and a heat exchange assembly disposed inside the first recovery box and the second recovery box. The heat exchange assembly includes: a heat exchange pipe, a heat dissipation plate, a fixing sleeve, a connecting pipe, and a water inlet pipe.

[0006] Preferably, both the first and second recycling bins are equipped with heat exchange tubes, multiple heat dissipation plates are installed on the heat exchange tubes, and a fixing sleeve is installed on the heat exchange tubes. A connecting pipe is fixedly installed between the first and second recycling bins, and a water inlet pipe is installed on the top of the first and second recycling bins. A sealing cap is threaded onto the top of the water inlet pipe.

[0007] Preferably, the heat exchange tube has an "S" shaped structure, and the heat sink is made of copper-aluminum alloy.

[0008] Preferably, a temperature sensor is fixedly installed inside both the first and second recycling bins, and an electronic display screen connected to the temperature sensor via a wire is installed on the top of both the first and second recycling bins.

[0009] Preferably, a water pump a is fixedly installed at the bottom of the outer end of both the first and second recycling bins, a water pump a is installed between the water pump a and the first and second recycling bins, and a drain pipe a is installed on the top of the water pump a.

[0010] Preferably, a processing box is installed at the outer end of the second recycling box, an exhaust pipe is installed between the processing box and the second recycling box, a water supply pipe is installed inside the processing box, multiple nozzles are installed at the bottom of the water supply pipe, and an air outlet pipe is installed on one side of the outer end of the processing box.

[0011] Preferably, the nozzle has a collection net at its bottom, sliders are installed on both sides of the bottom of the collection net, concave grooves are installed on both sides of the inner wall of the treatment box and are slidably connected to the sliders, a water pump b is fixedly installed at the bottom of the outer end of the treatment box, a water pump b is installed between the water pump b and the treatment box, and a drain pipe b is installed on the top of the water pump b.

[0012] The beneficial effects of this utility model are:

[0013] The heat exchange component of this invention can recover and reuse the waste heat generated by the boiler. After heating the water, it can provide hot water for the factory's shower room, making it convenient for workers to take showers. This saves resources and also avoids waste heat being discharged into the atmosphere with the flue gas, causing pollution. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic cross-sectional view of the present invention.

[0016] Figure 3 This is a schematic diagram of the heat sink structure of this utility model.

[0017] Figure 4 This is a schematic diagram of the internal structure of the processing box of this utility model.

[0018] Figure 5 This is a schematic diagram of the collection net structure of this utility model.

[0019] Figures 1-5In the middle: 1. First recycling bin; 101. Air inlet pipe; 102. Connecting pipe head; 103. Heat exchange pipe; 104. Heat dissipation plate; 105. Fixing sleeve; 106. Connecting pipe; 107. Water inlet pipe; 2. Second recycling bin; 3. Temperature sensor; 301. Electronic display screen; 4. Water pump a; 401. Water suction pipe a; 402. Drain pipe a; 5. Processing bin; 501. Exhaust pipe; 502. Water supply pipe; 503. Nozzle; 504. Air outlet pipe; 505. Collection net; 506. Slider; 507. Concave chute; 508. Water pump b; 509. Drain pipe b. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments. Example

[0022] like Figures 1-5 As shown, a waste heat recovery and utilization device for a thermal power plant boiler includes: a first recovery box 1, an air inlet pipe 101 installed on the top of the first recovery box 1, a connecting pipe head 102 installed at the outer end of the air inlet pipe 101, a second recovery box 2 disposed on one side of the outer end of the first recovery box 1, and a heat exchange assembly disposed inside the first recovery box 1 and the second recovery box 2. The heat exchange assembly includes: a heat exchange pipe 103, a heat dissipation plate 104, a fixing sleeve 105, a connecting pipe 106, and a water inlet pipe 107.

[0023] The first recycling bin 1 and the second recycling bin 2 are both equipped with heat exchange tubes 103. Multiple heat dissipation plates 104 are installed on the heat exchange tubes 103. Fixed sleeves 105 are installed on the heat exchange tubes 103. A connecting pipe 106 is fixedly installed between the first recycling bin 1 and the second recycling bin 2. A water inlet pipe 107 is installed on the top of the first recycling bin 1 and the second recycling bin 2. A sealing cap is threaded to the top of the water inlet pipe 107.

[0024] When the boiler in a thermal power plant is in use, the connecting pipe 102 at one end of the flue gas pipe and the inlet pipe 101 is fixedly installed. The connecting pipe 102 has a filter screen inside to filter particles in the flue gas. The other end of the inlet pipe 101 is fixedly installed to the heat exchange tube 103 inside the first recovery box 1. Then, the heat exchange tubes 103 inside the first recovery box 1 and the second recovery box 2 are fixedly connected via the connecting pipe 106. The exhaust pipe 501 passes through the interior of the second recovery box 2 and is fixedly installed to one end of the heat exchange tube 103 inside the second recovery box 2, ensuring that the entire pipeline is interconnected and the flue gas can flow away. At this time, the sealing cap at the top of the water inlet pipe 107 is opened, allowing water to flow from the water inlet pipe 107 to the first… Cold water is added to the recycling bins 1 and 2. After filling, the sealing cap is tightened on the top of the water inlet pipe 107 to prevent debris from entering. The large amount of waste heat generated by the boiler in the thermal power plant is discharged into the flue pipe along with the flue gas and then enters the heat exchange tube 103 through the air inlet pipe 101. The heat exchange tube 103 and the heat dissipation plate 104 come into contact with the cold water in the first recycling bin 1. The heat dissipation plate 104 absorbs the waste heat in the heat exchange tube 103 and dissipates it into the first recycling bin 1, which can heat the cold water in the first recycling bin 1 and recover and reuse the waste heat generated by the boiler. After the water is heated, it can provide hot water for the shower room in the plant area, which is convenient for workers to take a shower. At the same time, it saves resources and avoids the waste heat being discharged into the atmosphere with the flue gas, causing pollution.

[0025] After the waste heat is initially recovered and utilized in the first recovery tank 1, the remaining hot flue gas will enter the heat exchange tube 103 of the second recovery tank 2 through the connecting pipe 106. The waste heat in the heat exchange tube 103 can be absorbed again through the heat dissipation plate 104 on the heat exchange tube 103 and dissipated into the second recovery tank 2. This can heat the cold water in the second recovery tank 2. During use, the heat exchange tube 103 can be fixedly installed with the inner wall of the first recovery tank 1 and the second recovery tank 2 through the fixing sleeve 105, so that the heat exchange tube 103 can be used stably inside the first recovery tank 1 and the second recovery tank 2.

[0026] The heat exchange tube 103 has an "S" shaped structure, and the heat dissipation plate 104 is made of copper-aluminum alloy. When the heat exchange tube 103 is installed inside the first recovery box 1 and the second recovery box 2, the "S" shaped structure of the heat exchange tube 103 allows the flue gas to flow out of the heat exchange tube 103 for a longer time, thus increasing the contact time with the cold water inside the first recovery box 1 and the second recovery box 2. This means that more of the waste heat can be dissipated to heat the cold water inside the first recovery box 1 and the second recovery box 2. Furthermore, the heat dissipation plate 104 is made of copper-aluminum alloy, which gives it excellent thermal conductivity, allowing the waste heat in the heat exchange tube 103 to be transferred into the first recovery box 1 and the second recovery box 2.

[0027] Temperature sensors 3 are fixedly installed inside the first recycling tank 1 and the second recycling tank 2. Electronic display screens 301 connected to the temperature sensors 3 via wires are installed on the top of the first recycling tank 1 and the second recycling tank 2. When the waste heat is introduced into the first recycling tank 1 and the second recycling tank 2 to heat the cold water, the temperature sensors 3 can detect the water temperature inside the first recycling tank 1 and the second recycling tank 2 and transmit the detected information to the electronic display screen 301 via electrical signals. The specific water temperature value can be displayed on the electronic display screen 301.

[0028] The temperature sensor 3 can be model WZP-291. Its working principle is as follows: The temperature sensor 3 is generally composed of three parts: a temperature sensing element, a conversion element, and a temperature conversion circuit. The function of the temperature sensing element is to convert the sensed temperature signal into a quantity that is easily measurable and has a certain relationship with the temperature. The function of the conversion element is to convert the physical quantity output by the temperature sensing element into an electrical quantity output. The function of the conversion circuit is to convert the electrical quantity output by the conversion element into an easily measurable electrical quantity, such as voltage, current, frequency, etc. The temperature sensor 3 is a mature and conventional technology in this technical field, and this solution does not make any improvements to the circuit or program of the temperature sensor 3. The circuit and signal connection method between the temperature sensor 3 and the electronic display screen 301 is also a common and conventional technology, so its circuit and signal connection relationship will not be described in detail.

[0029] The first recycling bin 1 and the second recycling bin 2 are both fixedly equipped with water pumps a4 at their outer bottoms. Water pumps a401 are installed between water pumps a4 and the first recycling bin 1 and the second recycling bin 2. A drain pipe a402 is installed on the top of water pumps a4. When the water temperature shown on the electronic display screen 301 is suitable for showering, the drain pipe a402 can be connected to the water storage tank in the factory's shower room. When water pumps a4 are started, they generate negative pressure suction in the water pumps a401, which can draw out the hot water from the first recycling bin 1 or the second recycling bin 2. The hot water is then pumped by water pumps a4 and discharged into the drain pipe a402, and then transported through the pipeline to the water storage tank in the factory's shower room for storage, so that the factory workers can use it for showering.

[0030] The second recycling box 2 has a processing box 5 installed at its outer end. An exhaust pipe 501 is installed between the processing box 5 and the second recycling box 2. A water supply pipe 502 is installed inside the processing box 5. Multiple nozzles 503 are installed at the bottom of the water supply pipe 502. An exhaust pipe 504 is installed on one side of the outer end of the processing box 5. After the waste heat in the flue gas is utilized, the flue gas is discharged into the processing box 5 from the exhaust pipe 501. The outer end of the water supply pipe 502 can be connected to an external pipe. Water is drawn into the water supply pipe 502 through the external pipe and then delivered to the nozzles 503 to spray water mist, which combines with the flue gas inside the processing box 5 to reduce dust in the flue gas and prevent it from being discharged with the flue gas and causing atmospheric pollution. The flue gas after dust removal can be discharged outside the processing box 5 from the exhaust pipe 504.

[0031] The nozzle 503 has a collection net 505 at its bottom, and sliders 506 are installed on both sides of the bottom of the collection net 505. The inner wall of the treatment box 5 has concave grooves 507 that are slidably connected to the sliders 506. A water pump b508 is fixedly installed at the bottom of the outer end of the treatment box 5. A water pump b is installed between the water pump b508 and the treatment box 5. A drain pipe b509 is installed on the top of the water pump b508.

[0032] After the flue gas is sprayed for dust suppression, the wastewater and impurities fall into the collection net bag 505. The collection net bag 505 collects the impurities, while the wastewater falls into the bottom of the treatment tank 5 and is collected. The drain pipe b509 can be connected to the water storage tank in the factory toilet. When the water pump b508 is started, the water pump b508 generates a negative pressure suction in the water suction pipe b, which can draw out the wastewater collected at the bottom of the treatment tank 5. The wastewater is then discharged into the drain pipe b509 by the water pump b508 and transported to the water storage tank in the factory toilet for use in flushing toilets. After the collection net bag 505 collects the impurities, the outer door of the treatment tank 5 can be opened, and the collection net bag 505 can be pulled out. The slider 506 can slide in the concave groove 507 to remove the collection net bag 505, making it easy to clean the collected impurities and avoid clogging the collection net bag 505, which would affect normal use.

[0033] Working principle:

[0034] When the boiler in a thermal power plant is in use, the connecting pipe 102 at one end of the flue gas pipe and the inlet pipe 101 is fixedly installed. The connecting pipe 102 has a filter screen inside to filter particles in the flue gas. The other end of the inlet pipe 101 is fixedly installed to the heat exchange tube 103 inside the first recovery box 1. Then, the heat exchange tubes 103 inside the first recovery box 1 and the second recovery box 2 are fixedly connected via the connecting pipe 106. The exhaust pipe 501 passes through the interior of the second recovery box 2 and is fixedly installed to one end of the heat exchange tube 103 inside the second recovery box 2, ensuring that the entire pipeline is interconnected and the flue gas can flow away. At this time, the sealing cap at the top of the water inlet pipe 107 is opened, allowing water to flow from the water inlet pipe 107 to the first… Cold water is added to the recycling bins 1 and 2. After filling, the sealing cap is tightened on the top of the water inlet pipe 107 to prevent debris from entering. The large amount of waste heat generated by the boiler in the thermal power plant is discharged into the flue pipe along with the flue gas and then enters the heat exchange tube 103 through the air inlet pipe 101. The heat exchange tube 103 and the heat dissipation plate 104 come into contact with the cold water in the first recycling bin 1. The heat dissipation plate 104 absorbs the waste heat in the heat exchange tube 103 and dissipates it into the first recycling bin 1, which can heat the cold water in the first recycling bin 1 and recover and reuse the waste heat generated by the boiler. After the water is heated, it can provide hot water for the shower room in the plant area, which is convenient for workers to take a shower. At the same time, it saves resources and avoids the waste heat being discharged into the atmosphere with the flue gas, causing pollution.

[0035] After the residual heat in the flue gas is utilized, the flue gas is discharged into the treatment box 5 from the exhaust pipe 501. The outer end of the water supply pipe 502 can be connected to an external pipe. Water is drawn into the water supply pipe 502 through the external pipe and then delivered to the nozzle 503 to spray water mist, which combines with the flue gas inside the treatment box 5 to reduce dust in the flue gas and prevent it from causing atmospheric pollution when discharged with the flue gas. The flue gas after dust removal can be discharged outside the treatment box 5 from the exhaust pipe 504.

[0036] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0037] The above provides a detailed description of a waste heat recovery and utilization device for a thermal power plant boiler provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A waste heat recovery and utilization device for boilers in thermal power plants, characterized in that, include: First recycling bin (1); An air inlet pipe (101) is installed on the top of the first recycling bin (1). The connecting pipe head (102) is installed at the outer end of the air intake pipe (101); The second recycling bin (2) is located on one side of the outer end of the first recycling bin (1); The heat exchange components are installed inside the first recycling bin (1) and the second recycling bin (2). The heat exchange components include: heat exchange tube (103), heat dissipation plate (104), fixing sleeve (105), connecting pipe (106) and water inlet pipe (107).

2. The waste heat recovery and utilization device for thermal power plant boilers according to claim 1, characterized in that, Both the first recycling bin (1) and the second recycling bin (2) are equipped with heat exchange tubes (103), and multiple heat dissipation plates (104) are installed on the heat exchange tubes (103). A fixing sleeve (105) is installed on the heat exchange tubes (103). A connecting pipe (106) is fixedly installed between the first recycling bin (1) and the second recycling bin (2). A water inlet pipe (107) is installed on the top of the first recycling bin (1) and the second recycling bin (2). A sealing cap is threaded onto the top of the water inlet pipe (107).

3. The waste heat recovery and utilization device for thermal power plant boilers according to claim 2, characterized in that, The heat exchange tube (103) has an "S" shaped structure, and the heat sink (104) is made of copper-aluminum alloy.

4. The waste heat recovery and utilization device for thermal power plant boilers according to claim 1, characterized in that, Temperature sensors (3) are fixedly installed inside the first recycling bin (1) and the second recycling bin (2). Electronic displays (301) connected to the temperature sensors (3) via wires are installed on the top of the first recycling bin (1) and the second recycling bin (2).

5. The waste heat recovery and utilization device for thermal power plant boilers according to claim 1, characterized in that, A water pump a (4) is fixedly installed at the bottom of the outer end of the first recycling bin (1) and the second recycling bin (2). A water pump a (401) is installed between the water pump a (4) and the first recycling bin (1) and the second recycling bin (2). A drain pipe a (402) is installed on the top of the water pump a (4).

6. The waste heat recovery and utilization device for thermal power plant boilers according to claim 1, characterized in that, A processing box (5) is installed at the outer end of the second recycling box (2). An exhaust pipe (501) is installed between the processing box (5) and the second recycling box (2). A water supply pipe (502) is installed inside the processing box (5). Multiple nozzles (503) are installed at the bottom of the water supply pipe (502). An air outlet pipe (504) is installed on one side of the outer end of the processing box (5).

7. The waste heat recovery and utilization device for thermal power plant boilers according to claim 6, characterized in that, The nozzle (503) is provided with a collection net (505) at the bottom. The collection net (505) is equipped with sliders (506) on both sides of the bottom. The inner wall of the treatment box (5) is equipped with concave grooves (507) that are slidably connected to the sliders (506). A water pump b (508) is fixedly installed at the bottom of the outer end of the treatment box (5). A water pump b is installed between the water pump b (508) and the treatment box (5). A drain pipe b (509) is installed on the top of the water pump b (508).

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