Heat recovery device for high temperature slag of boiler

Abstract

The present invention discloses a heat recovery device for high-temperature slag of a boiler, wherein the device solves the problem that the current device cannot recover the heat of the high-temperature slag, comprises a high-temperature boiler, a second water tank, and a hot air blower. A collecting component is arranged on the outer side of the high-temperature boiler, and the collecting component comprises a collecting box, a first slide rail, a second slide rail, a slag collecting box, and a first ventilation pipe. The collecting box is fixedly installed at the bottom of the high-temperature boiler, and two groups of the slide rails are fixedly installed on both sides of the inner wall of the collecting box. The slag collecting box is slidably connected to the two groups of slide rails. One end of the first ventilation pipe passes through the box wall of the collecting box, and the other end is connected to the hot air blower. Hot air is drawn into the second ventilation pipe through the hot air blower to heat the pipe body, thereby heating the water in the second water tank, and the heat of the high-temperature slag is recovered to heat the domestic water of the factory, thereby reducing the energy consumption of the factory and reusing the high-temperature slag to achieve the effect of energy saving and emission reduction.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat recovery, and in particular relates to a heat recovery device for high-temperature slag of a boiler. Background Art

[0002] The boilers of iron and steel plants across the country produce about 300 kg of slag for every ton of pig iron produced, and the discharge temperature is about 1450°C. One ton of blast furnace slag contains about 1700 MJ of heat, which is equivalent to the calorific value of 0.058 tons of standard coal. Boiler slag is obviously a high-grade waste heat resource with high recycling value. At present, most iron and steel enterprises generally discharge the slag directly to the outside of the furnace body after cooling through the ash discharge pipe. The temperature of the slag discharged from the boiler is very high, which greatly wastes the heat in the slag ash, is not conducive to the recycling of waste heat, and thus forms a waste of resources.

[0003] Most of the existing devices do not have the function of reusing high-temperature slag and can only discharge it into a slag trough for collection. The heat of the slag is not effectively recovered, resulting in a large amount of resource waste. At the same time, the heat in the boiler cannot be efficiently utilized. Summary of the invention

[0004] The purpose of the present invention is to provide a heat recovery device for high-temperature slag of a boiler and a method of using the device in order to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a heat recovery device for high-temperature slag of a boiler and a method of use, comprising a high-temperature boiler, wherein a cooling component, a collecting component and a heating component are arranged on the outside of the high-temperature boiler, the collecting component comprises a collecting box, a first slide rail, a second slide rail, a slag collecting box, a first ventilation pipe, a fourth electric valve, a wastewater discharge pipe, a fifth electric valve and a temperature sensor, the collecting box is fixedly mounted on the bottom of the high-temperature boiler, a cabinet door is hinged on the outside of the collecting box, the first slide rail is fixedly mounted on one side of the inner wall of the collecting box, the second slide rail is fixedly mounted on the other side of the inner wall of the collecting box, the slag collecting box is slidably connected to the two sets of slide rails, one end of the first ventilation pipe passes through the box wall of the collecting box, and the other end is connected to the hot air blower, and the fourth electric valve is fixedly mounted inside the first ventilation pipe.

[0006] The present invention further illustrates that the wastewater discharge pipe is arranged on one side of the collection box, and the fifth electric valve is arranged inside the wastewater discharge pipe.

[0007] The present invention further describes that the temperature sensor is fixedly mounted on the inner box wall of the collection box.

[0008] The present invention further illustrates that a water-cooling pipeline is built into the furnace wall of the high-temperature boiler, an air inlet pipe is arranged on the top of one end of the furnace body of the high-temperature boiler, the air inlet pipe is externally connected to a gas conveying device, a feed port is arranged on one side of the furnace body of the high-temperature boiler, a first air outlet pipe is arranged on the top of the furnace body of the high-temperature boiler, a second air outlet pipe is arranged on the first air outlet pipe, one end of the second air outlet pipe is connected to a three-pipe joint, a third air outlet pipe and a fourth air outlet pipe are connected to the three-pipe joint, the other end of the third air outlet pipe penetrates through the furnace wall of the high-temperature boiler and extends into the interior, the other end of the fourth air outlet pipe penetrates through the box wall of the collecting box and extends to the outside through the inside of the collecting box and is connected to an external hot gas treatment device, and a slag discharge pipe is arranged at the bottom of the furnace body of the high-temperature boiler.

[0009] The present invention further illustrates that three groups of electric valves are fixedly installed inside the three-pipe joint, specifically including: A first electric valve connected to and controlling the opening and closing of the third air outlet pipe; A second electric valve connected to and controlling the opening and closing of the second air outlet pipe; The third electric valve is connected to and controls the opening and closing of the fourth air outlet pipe.

[0010] The present invention further illustrates that the cooling component includes a first water tank, a first water inlet, a first water outlet, a first water pipe, a second water inlet, a second water pipe, and a flushing nozzle. The first water tank is arranged on the ground of the production workshop and is located on one side of the high-temperature boiler. The first water inlet is opened at the top of the first water tank, and the first water outlet is arranged on one side of the box body of the first water tank. One end of the first water pipe is connected to the first water outlet, and the other end passes through the furnace wall of the high-temperature boiler and is connected to the built-in water-cooling pipeline of the high-temperature boiler. The second water inlet is arranged on the first water tank and is located on one side of the first water outlet. One end of the second water pipe is connected to the second water inlet, and the other end passes through the furnace wall of the high-temperature boiler and is connected to the built-in water-cooling pipeline of the high-temperature boiler. The first water tank, the first water pipe, the second water pipe and the built-in water-cooling pipeline of the high-temperature boiler constitute a water circulation loop. The flushing nozzle is fixedly installed on one side of the interior of the high-temperature boiler and is connected to the built-in water-cooling pipeline of the high-temperature boiler.

[0011] The present invention further describes that the heating assembly includes a second water tank, a second ventilation pipe, a third water inlet, a second water outlet, and a hot air blower. The second water tank is arranged on the ground of the production workshop, located on one side of the high-temperature boiler, the third water inlet is arranged on one side of the second water tank, and the second water outlet is arranged on the second water tank, located on one side of the third water inlet.

[0012] The present invention further describes that the hot air blower is arranged on the floor of the production workshop, one end of the second ventilation pipe passes through the box wall of the second water tank, extends into the interior and then extends to the outside and is connected to an external gas processing device for subsequent processing, and the other end is connected to the hot air blower.

[0013] The specific method is as follows: S1. When the equipment program detects that the working time of the high-temperature boiler is T1, the equipment program controls the opening value of the third electric valve to be X1. At this time, the high-temperature boiler has just started to operate, and the internal temperature is low and needs to be preheated. The equipment program controls the opening value of the third electric valve to the minimum, reducing the discharge of gas after heating and accelerating the preheating of the high-temperature boiler; S2. When the device program detects that the working time of the high-temperature boiler is T2, the high-temperature boiler has been running for a period of time and the internal temperature has also increased. The device program controls the opening value of the third electric valve to X2. Under the condition that the gas in the high-temperature boiler can flow normally, the opening value of the third electric valve is slightly increased to prevent the excessive hot gas generated in the high-temperature boiler from being unable to be discharged in time and causing damage to the boiler; S3. When the equipment program detects that the working time of the high-temperature boiler is T3, the equipment program controls the opening value of the third electric valve to be X3 and controls the opening of the first electric valve, opens the third electric valve to the maximum and opens the first electric valve together, and diverts the hot gas in the high-temperature boiler to the air inlet pipe, which can preheat the gas transported in by the air inlet pipe. The third electric valve is opened to the maximum to ensure the normal circulation of gas in the high-temperature boiler.

[0014] The specific method is as follows: S1, when the device program detects that the value of the temperature sensor is M1, the temperature in the collection box is low at this time, the device program has no operation, the hot air blower is in the off state, and the fourth electric valve is in the off state; S2, when the equipment program detects that the value of the temperature sensor is M2, the equipment program determines that high-temperature slag has fallen into the collection box, and the equipment program controls the fourth electric valve to open, the hot air blower starts at a speed of V1, and the hot air blower slowly draws hot air into the second ventilation duct; S3. When the equipment program detects that the value of the temperature sensor is M3, the equipment program determines that a large amount of high-temperature slag has been stored in the collection box. The equipment program controls the speed of the hot air blower to increase to V2, and the hot air blower quickly draws hot air into the second ventilation duct.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention is provided with a collecting assembly on the outer side of the high-temperature boiler, the collecting assembly includes a collecting box, a first slide rail, a second slide rail, a slag collecting box, a first ventilation pipe, a fourth electric valve, a wastewater discharge pipe, a fifth electric valve, and a temperature sensor; the collecting box is fixedly mounted on the bottom of the high-temperature boiler; a cabinet door is hingedly mounted on the outer side of the collecting box; the first slide rail is fixedly mounted on one side of the inner wall of the collecting box; the second slide rail is fixedly mounted on the other side of the inner wall of the collecting box; one end of the first ventilation pipe passes through the box wall of the collecting box, and the other end is connected to the hot air blower; the fourth electric valve is fixedly mounted inside the first ventilation pipe, and the hot air blower draws the slag into the second ventilation pipe to heat the pipe body, thereby heating the factory domestic water in the second water tank, recovering the heat of the high-temperature slag for heating the factory domestic water, reducing the energy consumption of the factory, and reusing the high-temperature slag to achieve the effect of energy saving and emission reduction; By using the equipment program in conjunction with the hot air blower and temperature sensor, the temperature of the collected slag can be detected. When the amount of high-temperature slag increases, the hot gas it generates will also increase. At this time, controlling the hot air blower to increase the speed can effectively improve the heat recovery efficiency of the high-temperature slag and reduce the waste of hot gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is another perspective overall structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the pipeline of a high temperature boiler 1 of the present invention; Figure 4 The present invention Figure 3 Schematic diagram of the internal structure of the middle area A; Figure 5 is a schematic diagram of a cooling component 2 of the present invention; Figure 6 It is a schematic diagram of the position of the flushing nozzle 24 of the present invention; Figure 7 is a schematic diagram of the collection component 3 of the present invention; Figure 8 is a schematic diagram of a slag collecting box 33 of the present invention; Fig. 9 It is a schematic diagram of the interior of the collection box 31 of the present invention; Fig.10 It is a schematic diagram of the internal water cooling pipeline of the high temperature boiler 1 of the present invention; Fig.11is a schematic diagram of a heating assembly 4 of the present invention; Fig.12 is a schematic diagram of the internal piping of the second water tank 41 of the present invention; Fig.13 The present invention Fig.11 Schematic diagram of the internal structure of the middle area B; Fig.14 The present invention Fig.11 Schematic diagram of the internal structure of the middle area C.

[0017] In the figure: 1, high temperature boiler; 12, air inlet pipe; 13, feed port; 14, first air outlet pipe; 141, second air outlet pipe; 142, three-way joint; 1421, first electric valve; 1422, second electric valve; 1423, third electric valve; 143, third air outlet pipe; 144, fourth air outlet pipe; 15, slag discharge pipe; 2. Cooling component; 21. First water tank; 211. First water inlet; 22. First water outlet; 221. First water pipe; 23. Second water inlet; 231. Second water pipe; 24. Flushing nozzle; 3. Collection assembly; 31. Collection box; 321. First slide rail; 322. Second slide rail; 33. Slag collection box; 34. First ventilation pipe; 341. Fourth electric valve; 35. Wastewater discharge pipe; 351. Fifth electric valve; 36. Temperature sensor; 4. Heating component; 41. Second water tank; 411. Second ventilation pipe; 412. Third water inlet; 413. Second water outlet; 42. Hot air blower. DETAILED DESCRIPTION

[0018] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-14The present invention provides a technical solution: a heat recovery device for high-temperature slag of a boiler and a method for using the same, comprising a high-temperature boiler 1, a water-cooling pipeline is built into the furnace wall of the high-temperature boiler 1, which is used for water cooling during production to prevent workers from accidentally touching the furnace body at high temperature and causing burns, an air inlet pipe 12 is arranged on the top of one end of the furnace body of the high-temperature boiler 1, the air inlet pipe 12 is externally connected to a gas conveying device, which is used to convey fresh air into the high-temperature boiler 1 to ensure sufficient combustion inside the boiler, a feed port 13 is arranged on one side of the furnace body of the high-temperature boiler 1, which is used to convey coal into the boiler, a first air outlet pipe 14 is arranged on the top of the furnace body of the high-temperature boiler 1, a second air outlet pipe 141 is arranged on the first air outlet pipe 14, and the two groups of air outlet pipes are used to discharge the high-temperature gas generated in the high-temperature boiler 1, one end of the second air outlet pipe 141 is connected to a three-pipe joint 142, the three-pipe joint 142 is connected to a third air outlet pipe 143 and a fourth air outlet pipe 144, and the three-pipe joint 142 is used to discharge the high-temperature gas generated in the high-temperature boiler 1 through multiple pipes Three groups of electric valves are fixedly installed inside the three-pipe joint 142, specifically including: a first electric valve (1421), which is connected to and controls the opening and closing of the third outlet pipe (143); a second electric valve (1422), which is connected to and controls the opening and closing of the second outlet pipe (141); and a third electric valve (1423), which is connected to and controls the opening and closing of the fourth outlet pipe (144). The three groups of electric valves are used to control the circulation of hot gas in cooperation with the equipment program. The other end of the third outlet pipe 143 penetrates the furnace wall of the high-temperature boiler 1 and extends into the interior. The other end of the fourth outlet pipe 144 penetrates the box wall of the collecting box 31 and extends to the outside through the box body of the collecting box 31 and is connected to an external hot gas treatment device. The three groups of outlet pipes are used to recover the high-temperature gas generated in the high-temperature boiler 1 and reuse it. A slag discharge pipe 15 is provided at the bottom of the furnace body of the high-temperature boiler 1 for discharging the slag in the high-temperature boiler 1. A cooling component 2, a collecting component 3, and a heating component 4 are provided on the outside of the high-temperature boiler 1.

[0020] The cooling component 2 includes a first water tank 21, a first water inlet 211, a first water outlet 22, a first water pipe 221, a second water inlet 23, a second water pipe 231, and a flushing nozzle 24; The first water tank 21 is arranged on the floor of the production workshop, located on one side of the high-temperature boiler 1, and is used to store cooling water. A water pump is built in the first water tank 21 (not shown in the figure). The first water inlet 211 is opened on the top of the first water tank 21, and is used to supply water to the first water tank 21 from an external water source. The first water outlet 22 is arranged on one side of the box body of the first water tank 21. One end of the first water pipe 221 is connected to the first water outlet 22, and the other end passes through the furnace wall of the high-temperature boiler 1 and is connected to the built-in water cooling pipeline of the high-temperature boiler 1. The second water inlet 23 is arranged on the first water tank 21, and is located on one side of the first water outlet 22. The second water pipe 221 One end of 231 is connected to the second water inlet 23, and the other end passes through the furnace wall of the high-temperature boiler 1 and is connected to the built-in water cooling pipeline of the high-temperature boiler 1. The first water tank 21, the first water pipe 221, the second water pipe 231 and the built-in water cooling pipeline of the high-temperature boiler 1 constitute a water circulation loop, which is used to circulate water and cool the high-temperature boiler 1 during production. The flushing nozzle 24 is fixedly installed on one side of the interior of the high-temperature boiler 1. The flushing nozzle 24 is equipped with an electric valve (not shown in the figure) and is connected to the built-in water cooling pipeline of the high-temperature boiler 1. It is used to spray cooling water to flush the inside of the high-temperature boiler 1 after the production of the high-temperature boiler 1 is completed.

[0021] The collecting assembly 3 includes a collecting box 31, a first slide rail 321, a second slide rail 322, a slag collecting box 33, a first ventilation pipe 34, a fourth electric valve 341, a wastewater discharge pipe 35, a fifth electric valve 351, and a temperature sensor 36; The collecting box 31 is fixedly installed at the bottom of the high-temperature boiler 1 and is used to store the high-temperature slag dropped from the inside of the high-temperature boiler 1. A cabinet door is hinged on the outside of the collecting box 31. The first slide rail 321 is fixedly installed on one side of the inner wall of the collecting box 31, and the second slide rail 322 is fixedly installed on the other side of the inner wall of the collecting box 31. The two sets of slide rails are used to slide with the slag collecting box 33. The slag collecting box 33 is slidably connected to the two sets of slide rails. The body of the slag collecting box 33 is a metal screen, which can effectively collect the high-temperature slag. One end of the first ventilation pipe 34 passes through the collecting box 31. The box wall has one end connected to the hot air blower 42, and the other end is connected to the collection box 31. The fourth electric valve 341 is fixedly installed inside the first ventilation pipe 34, and is used to cooperate with the equipment program to control the circulation of hot air. The wastewater discharge pipe 35 is set on one side of the collection box 31, and is used to discharge the wastewater generated during cleaning. The fifth electric valve 351 is set inside the wastewater discharge pipe 35, and is used to cooperate with the equipment program to control drainage. The temperature sensor 36 is fixedly installed on the inner box wall of the collection box 31, and is used to cooperate with the equipment program to detect the internal temperature of the collection box 31.

[0022] The heating assembly 4 includes a second water tank 41, a second ventilation pipe 411, a third water inlet 412, a second water outlet 413, and a hot air blower 42; The second water tank 41 is arranged on the floor of the production workshop, located on one side of the high-temperature boiler 1. The hot air blower 42 is arranged on the floor of the production workshop, and is used to draw the hot air in the collection box 31 into the second ventilation pipe 411. One end of the second ventilation pipe 411 passes through the box wall of the second water tank 41, extends into the interior, and then extends to the outside and is externally connected to a gas treatment device for subsequent processing. The other end is connected to the hot air blower 42. The third water inlet 412 is arranged on one side of the second water tank 41, and is used to connect an external water source to provide water to the second water tank 41. The second water outlet 413 is arranged on the second water tank 41, and is located on one side of the third water inlet 412.

[0023] The high temperature boiler 1 is equipped with a device program, which can control the opening and closing of five groups of electric valves, the opening and closing of the built-in water pump of the first water tank 21, the opening and closing of the hot air blower 42, and the opening and closing of the built-in electric valve of the flushing nozzle 24; Five groups of electric valves, the built-in water pump of the first water tank 21, the temperature sensor 36, the hot air blower 42, and the built-in electric valves of the flushing nozzle 24 are all connected to the equipment program signal. The high-temperature boiler 1 provides power to the internal devices through an external power supply, and the built-in water pump of the first water tank 21 and the hot air blower 42 are powered by an external power supply.

[0024] Embodiment 1: When the staff needs to use the boiler for production operation, the staff first turns on the external power supply, the high-temperature boiler 1 starts, the equipment program starts, the equipment program controls the first electric valve 1421 to close, the second electric valve 1422 and the third electric valve 1423 to open, the staff pours coal into the high-temperature boiler 1 from the feed port 13, the high-temperature boiler 1 starts to operate, and the air enters the high-temperature boiler 1 from the air intake pipe 12. At this time, the equipment program sets the working time of the high-temperature boiler 1 to T1, T2, T3, and the opening value of the third electric valve 1423 is X1, X2, X3. When the equipment program detects that the working time of the high-temperature boiler 1 is T1, the equipment program controls the opening value of the third electric valve 1423 to X1. At this time, the high-temperature boiler 1 has just started to run, and the internal temperature is low and needs to be preheated. The equipment program controls the opening value of the third electric valve 1423 to be the minimum, which reduces the discharge of gas after heating and speeds up the preheating of the high-temperature boiler 1. When the equipment program detects that the working time of the high-temperature boiler 1 is T2, the high-temperature boiler 1 has been running for a period of time and the internal temperature has also increased. The equipment program controls the opening value of the third electric valve 1423 to be X2. While ensuring that the gas in the high-temperature boiler 1 can circulate normally, the opening value of the third electric valve 1423 is slightly increased to prevent the excessive hot gas generated in the high-temperature boiler 1 from being unable to be discharged in time and causing damage to the boiler. When the equipment program detects that the working time of the high-temperature boiler 1 is T3, the equipment program controls the opening value of the third electric valve 1423 to be X3 and controls the first electric valve 1421 to be opened, opens the third electric valve 1423 to the maximum and opens the first electric valve 1421 together, and diverts the hot gas in the high-temperature boiler 1 to the air intake pipe 12, so that the gas delivered by the air intake pipe 12 can be preheated. The third electric valve 1423 is opened to the maximum to ensure the normal circulation of gas in the high-temperature boiler 1.

[0025] By using three groups of electric valves in conjunction with the equipment program, the working time of the high-temperature boiler 1 can be detected and the stage of the high-temperature boiler 1 can be determined. In the preheating stage, the opening size of the third electric valve 1423 can be reduced to reduce the outflow of hot air and increase the preheating speed of the high-temperature boiler 1. When the preheating of the high-temperature boiler 1 is completed and the normal operation begins, the equipment program opens the first electric valve 1421 to preheat the air inhaled by the high-temperature boiler 1 with the hot air generated in the high-temperature boiler 1, preventing the entry of cold air that reduces the temperature in the high-temperature boiler 1 and causes incomplete combustion.

[0026] Embodiment 2: When the high-temperature boiler 1 starts to work normally, high-temperature slag will be produced as the coal is burned during the production process. The high-temperature slag will fall into the collection box 31 along the slag discharge pipe 15, and then fall on the slag collection box 33. At this time, since there is still a lot of residual heat left in the slag, the temperature in the collection box 31 will increase significantly, and a section of the fourth air outlet pipe 144 is arranged in an S shape above the interior of the collection box 31. The high-temperature gas in the fourth air outlet pipe 144 will also heat the air in the collection box 31. At this time, the equipment program detects the value of the temperature sensor 36. The equipment program sets the temperature values ​​to M1, M2, and M3, and the speeds of the hot air blower 42 to V1 and V2. When the equipment program detects that the value of the temperature sensor 36 is M1 At this time, the temperature in the collection box 31 is low, the equipment program has no operation, the hot air blower 42 is in a closed state, and the fourth electric valve 341 is in a closed state. When the equipment program detects that the value of the temperature sensor 36 is M2, the equipment program determines that high-temperature slag has fallen into the collection box 31, and the equipment program controls the fourth electric valve 341 to open, and the hot air blower 42 starts at a speed of V1. The hot air blower 42 slowly draws hot air into the second ventilation duct 411. When the equipment program detects that the value of the temperature sensor 36 is M3, the equipment program determines that a large amount of high-temperature slag has been stored in the collection box 31. The equipment program controls the speed of the hot air blower 42 to increase to V2, and the hot air blower 42 quickly draws hot air into the second ventilation duct 411.

[0027] A section of the second ventilation pipe 411 is arranged in an S shape on the bottom surface of the second water tank 41. When the high-temperature gas enters the second ventilation pipe 411, the pipe body of the second ventilation pipe 411 will be heated to heat the water in the second water tank 41. The water in the second water tank 41 is the factory's domestic water, which can be used for cleaning the floor or other equipment in the production workshop, or for daily washing of the staff. When the value of the temperature sensor 36 reaches M3, there is a lot of high-temperature slag in the collection box 31 and a large amount of hot air is generated. The hot air blower 42 draws it into the second ventilation pipe 411 to heat its pipe body, thereby heating the factory's domestic water in the second water tank 41, and recovers the heat of the high-temperature slag for heating the factory's domestic water, reducing the factory's energy consumption, and reusing the high-temperature slag to achieve the effect of energy saving and emission reduction.

[0028] By using the equipment program in conjunction with the hot air blower 42 and the temperature sensor 36, the temperature of the collected slag can be detected. When the amount of high-temperature slag increases, the hot gas it generates will also increase. At this time, controlling the hot air blower to increase the speed can effectively improve the heat recovery efficiency of the high-temperature slag and reduce the waste of hot gas.

[0029] Embodiment three: When the high-temperature boiler 1 is in production operation, the cold water in the first water tank 21 will circulate and cool the furnace body of the high-temperature boiler 1 to prevent the high-temperature furnace body from scalding the staff. The equipment program controls the built-in water pump in the first water tank 21 to start, and the cold water flows out from the first water outlet 22 to the first water pipe 221, and then enters the built-in water cooling pipeline of the high-temperature boiler 1 through the second water pipe 231 and flows back to the first water tank 21 to complete the water cooling circulation operation. When the production operation of the high-temperature boiler 1 is completed, the cooling water in the first water tank 21 will become hot water. After waiting for the high-temperature boiler 1 to cool down slightly, the staff uses tools to open the door of the collection box 31, and pulls out the slag collection box 33, and takes out the slag in the slag collection box 33 for collection. The slag still contains a large amount of coal, which can be crushed and made into coal bricks for daily use. The slag is reused to recover the remaining coal heat energy in the slag and reduce environmental pollution. After the slag is collected, the staff puts the slag collection box 33 back to its original position.

[0030] After the staff takes out the high-temperature slag, the equipment program is controlled to perform the cleaning operation. The equipment program controls the built-in water pump of the first water tank 21 to start, the built-in electric valve of the flushing nozzle 24 to open, the fifth electric valve 351 to open, and the fourth electric valve 341 to close. The flushing nozzle 24 sprays hot water to flush the slag remaining inside the high-temperature boiler 1. Since the water in the first water tank 21 is used to cool the high-temperature boiler 1 in the above operation, the heat of the furnace body of the high-temperature boiler 1 is recovered during the water circulation process, and the water in the first water tank 21 has become hot water Using hot water for flushing can prevent the high-temperature boiler 1 from coming into contact with cold water under high temperature and causing the temperature to drop suddenly, resulting in deformation of the furnace body. The residual slag will fall into the slag collection box 33, and the sewage generated during cleaning will be discharged to the outside from the wastewater discharge pipe 35. The equipment program sets the flushing time to T4. When the flushing time T4 is reached, the equipment program sends a completion message to the staff and controls the built-in water pump of the first water tank 21, the built-in electric valve of the flushing nozzle 24, and the fifth electric valve 351 to be closed. At this time, the staff takes out the slag collection box 33 and pours out the slag.

[0031] By using the first water tank 21 in conjunction with the equipment program, the furnace body of the high-temperature boiler 1 can be water-cooled during production operations to prevent workers from accidentally touching it and getting scalded. At the same time, the heat on the furnace body of the high-temperature boiler 1 can also be recovered. When the water in the first water tank 21 becomes hot water, it can be used to clean the high-temperature boiler 1. The hot water can prevent the furnace body at high temperature from deforming due to contact with cold water, and can also flush out the residual slag in the high-temperature boiler 1. After being flushed by water, the slag becomes damp and contains moisture. The damp slag can be used to make slag cement, thereby realizing the diversity of the secondary utilization of slag.

[0032] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat recovery device for high-temperature slag of a boiler, comprising a high-temperature boiler (1), characterized in that: The outer side of the high-temperature boiler (1) is provided with a cooling component (2), a collecting component (3), and a heating component (4); The collecting assembly (3) comprises a collecting box (31), a first slide rail (321), a second slide rail (322), a slag collecting box (33), a first ventilation pipe (34), a fourth electric valve (341), a wastewater discharge pipe (35), a fifth electric valve (351), and a temperature sensor (36); The collecting box (31) is fixedly mounted on the bottom of the high-temperature boiler (1); a cabinet door is hingedly mounted on the outer side of the collecting box (31); the first slide rail (321) is fixedly mounted on one side of the inner wall of the collecting box (31); the second slide rail (322) is fixedly mounted on the other side of the inner wall of the collecting box (31); the slag collecting box (33) is slidably connected to the two sets of slide rails; one end of the first ventilation pipe (34) passes through the box wall of the collecting box (31); the other end is connected to the hot air blower (42); and the fourth electric valve (341) is fixedly mounted inside the first ventilation pipe (34); The wastewater discharge pipe (35) is arranged on one side of the collection box (31), and the fifth electric valve (351) is arranged inside the wastewater discharge pipe (35); The temperature sensor (36) is fixedly mounted on the inner box wall of the collection box (31); A water cooling pipeline is built into the furnace wall of the high-temperature boiler (1); an air inlet pipe (12) is arranged at the top of one end of the furnace body of the high-temperature boiler (1); the air inlet pipe (12) is externally connected to a gas delivery device; a feed inlet (13) is arranged at one side of the furnace body of the high-temperature boiler (1); a first air outlet pipe (14) is arranged at the top of the furnace body of the high-temperature boiler (1); a second air outlet pipe (141) is arranged on the first air outlet pipe (14); one end of the second air outlet pipe (141) is connected to a three-pipe connection A head (142), a third gas outlet pipe (143) and a fourth gas outlet pipe (144) are connected to the three-pipe joint (142), the other end of the third gas outlet pipe (143) penetrates the furnace wall of the high-temperature boiler (1) and extends into the interior, the other end of the fourth gas outlet pipe (144) penetrates the box wall of the collecting box (31), extends to the outside through the box body of the collecting box (31) and is connected to an external hot gas treatment device, and a slag discharge pipe (15) is provided at the bottom of the furnace body of the high-temperature boiler (1); The cooling component (2) comprises a first water tank (21), a first water inlet (211), a first water outlet (22), a first water pipe (221), a second water inlet (23), a second water pipe (231), and a flushing nozzle (24); The first water tank (21) is arranged on the floor of the production workshop and is located on one side of the high-temperature boiler (1); the first water inlet (211) is opened at the top of the first water tank (21); the first water outlet (22) is arranged on one side of the body of the first water tank (21); one end of the first water pipe (221) is connected to the first water outlet (22); the other end passes through the furnace wall of the high-temperature boiler (1) and is connected to the built-in water cooling pipeline of the high-temperature boiler (1); the second water inlet (23) is arranged on the first water tank (21); Located on one side of the first water outlet (22), one end of the second water pipe (231) is connected to the second water inlet (23), and the other end penetrates the furnace wall of the high-temperature boiler (1) and is connected to the built-in water cooling pipeline of the high-temperature boiler (1); the first water tank (21), the first water pipe (221), the second water pipe (231) and the built-in water cooling pipeline of the high-temperature boiler (1) form a water circulation loop; the flushing nozzle (24) is fixedly installed on one side of the interior of the high-temperature boiler (1) and is connected to the built-in water cooling pipeline of the high-temperature boiler (1); The heating component (4) comprises a second water tank (41), a second ventilation pipe (411), a third water inlet (412), a second water outlet (413), and a hot air blower (42); The second water tank (41) is arranged on the floor of the production workshop, located on one side of the high-temperature boiler (1); the third water inlet (412) is arranged on one side of the second water tank (41); and the second water outlet (413) is arranged on the second water tank (41), located on one side of the third water inlet (412).

2. The heat recovery device for high-temperature slag of a boiler according to claim 1, characterized in that: Three groups of electric valves are fixedly installed inside the three-pipe joint (142), specifically including: a first electric valve (1421) connected to and controlling the opening and closing of the third air outlet pipe (143); A second electric valve (1422) connected to and controlling the opening and closing of the second air outlet pipe (141); The third electric valve (1423) is connected to and controls the opening and closing of the fourth air outlet pipe (144).

3. The heat recovery device for high-temperature slag of a boiler according to claim 1, characterized in that: The hot air blower (42) is arranged on the floor of the production workshop, one end of the second ventilation pipe (411) penetrates the wall of the second water tank (41), extends into the interior, then extends to the outside and is connected to an external gas processing device for subsequent processing, and the other end is connected to the hot air blower (42).

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