Device for spraying coal by using waste heat of discharged smoke of power generation boiler

Abstract

The utility model belongs to the technical field of recovery and utilization of exhaust smoke waste heat of a power generation boiler, and particularly relates to a device for spraying coal by using exhaust smoke waste heat of the power generation boiler, which comprises a power generation boiler waste smoke guide component, and a power generation boiler waste smoke filter component is arranged at the end part of the power generation boiler waste smoke guide component. A connecting assembly is arranged on the side of the power generation boiler waste smoke filtering assembly, a power generation boiler chimney is fixedly connected to the bottom of the connecting assembly, the power generation boiler waste smoke guiding assembly comprises a first smoke passing pipeline, a first induced draft fan is installed at the end of the first smoke passing pipeline, and the side of the first induced draft fan communicates with a second smoke passing pipeline; a first valve is mounted at the top of the second smoke pipeline, and a second valve is arranged on the side of the first valve; according to the utility model, the residual smoke generated in the operation of the power generation boiler can be filtered and then led to the coal injection machine for recycling, so that resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of recovery and utilization of exhaust heat from power generation boilers, in particular to a device for using exhaust heat from power generation boilers for coal injection. Background Art

[0002] Coal injection machine is a new type of coal-burning auxiliary equipment. Through special mechanical design, it can improve the combustion efficiency of coal powder, thereby saving fuel and improving the combustion rate. Coal injection machine, also called coal grinding powder injection machine, is a new type of coal-saving and coal-burning equipment, which can greatly save the use of coal powder and reduce the waste of coal powder.

[0003] In the existing steel enterprises, during the gas power generation process, the exhaust temperature of boilers is about 140℃. In general steel plants, this part of waste heat is not utilized and is discharged into the air in vain, resulting in a waste of heat energy. However, the coal injection machine in the ironmaking plant requires a large amount of heat energy to remove moisture from the anthracite, and the production of heat energy requires a certain amount of waste of resources. In addition, the smoke discharged from the exhaust chimney of the power generation boiler contains some dust. If this dust is directly directed to the coal injection machine with the hot air flow, it is easy to block the pipeline of the coal injection machine's gas supply system.

[0004] Therefore, in order to solve the above problems, a device for utilizing the waste heat of exhaust gas from power generation boilers for coal injection is proposed. Utility Model Content

[0005] In order to make up for the shortcomings of the existing technology, the problem that the exhaust temperature of boilers in the coal gas power generation process of existing steel enterprises is about 140℃ is solved. In general steel plants, this part of waste heat is not utilized and is discharged into the air in vain, resulting in a waste of heat energy. However, the coal injection machine in the iron and steel plant requires a large amount of heat energy to remove the moisture in the anthracite, and the production of heat energy requires a certain amount of waste of resources. In addition, the smoke discharged from the exhaust chimney of the power generation boiler contains some dust. If these dusts are directly directed to the coal injection machine with the hot air flow for use, it is easy to block the pipeline of the coal injection machine gas supply system.

[0006] The technical solution adopted by the utility model to solve its technical problems is: the device for using the waste heat of exhaust gas from a power generation boiler for coal injection described in the utility model comprises a waste smoke guide component for a power generation boiler, a waste smoke filter component for a power generation boiler is installed at the end of the waste smoke guide component for a power generation boiler, and a connecting component is arranged on the side of the waste smoke filter component for a power generation boiler, and the bottom of the connecting component is fixedly connected to the chimney of the power generation boiler, the waste smoke guide component for a power generation boiler comprises a first smoke passage duct, a first induced draft fan is installed at the end of the first smoke passage duct, and a second smoke passage duct is connected to the side of the first induced draft fan, and the A first valve is installed on the top of the second smoke duct, and a second valve is arranged on the side of the first valve, one end of the second smoke duct is connected with a smoke exhaust chimney, and the other end of the second smoke duct is connected with the third smoke duct, one side of the third smoke duct is connected with a fourth smoke duct, and the other side of the third smoke duct is connected with a fifth smoke duct, a second induced draft fan is installed inside the fifth smoke duct, and a heating furnace is arranged on the side of the second induced draft fan, an end of the fifth smoke duct is connected with an air supply mechanism of a coal injection machine, and a coal injection machine body is installed on the side of the air supply mechanism of the coal injection machine.

[0007] Preferably, the first smoke duct is connected to the smoke exhaust chimney through the second smoke duct, and the first smoke duct is connected to the third smoke duct through the second smoke duct.

[0008] Preferably, the third smoke duct forms a connecting structure with the air supply mechanism of the coal injection machine through the fifth smoke duct, the second induced draft fan, the heating furnace, and the third smoke duct forms a connecting structure with the air supply mechanism of the coal injection machine through the fourth smoke duct.

[0009] Preferably, the residual smoke filtering assembly of the power generation boiler includes an impurity filter cylinder, the interior of the impurity filter cylinder is fixedly connected to a filter bag, and the end of the impurity filter cylinder is fixedly connected to a first sealing gasket, the outer wall of the impurity filter cylinder is integrally connected to a first threaded ring, and the external thread of the first threaded ring is connected to a limiting nut, the top thread of the limiting nut is connected to a second threaded ring, and the inner wall of the second threaded ring is integrally connected to a smoke delivery pipe.

[0010] Preferably, the smoke delivery pipe forms a connecting structure with the first smoke delivery pipe through the impurity filter cylinder, and the smoke delivery pipe forms a detachable structure with the smoke delivery pipe through the first thread ring, the limiting nut and the second thread ring, and two limiting nuts are symmetrically arranged about the horizontal center axis of the impurity filter cylinder.

[0011] Preferably, the connecting assembly includes a residual smoke collector, the bottom end of the residual smoke collector is connected to an insertion pipe opening, and the outer wall of the insertion pipe opening is fixedly connected to a second sealing gasket, the outside of the residual smoke collector is fixedly connected to a first mounting flange, and a fixing bolt passes through the side of the first mounting flange, the end of the fixing bolt is threadedly connected to a fixing nut, and the top of the fixing nut is tightly fitted with the second mounting flange.

[0012] Preferably, the insertion pipe opening and the chimney of the power generation boiler form a nested structure, the first mounting flange forms a detachable structure with the second mounting flange through fixing bolts and fixing nuts, and the second mounting flange and the chimney of the power generation boiler are fixedly connected.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model is provided with a residual smoke guide component for a power generation boiler, which can guide the residual smoke containing a large amount of heat generated during the operation of the power generation boiler to the coal injection machine through a pipeline for use, so as to assist it in drying the coal powder, so as to facilitate the recycling of the residual smoke, reduce the heat emission, and facilitate environmental protection. At the same time, the recycling of the residual heat is also convenient for saving resources, and a multi-stage pipeline is provided, which can adjust whether the residual smoke is used directly or after heating according to the water seal content in the coal powder, so as to facilitate improving its flexibility, so that the residual smoke can better serve the coal powder drying;

[0015] 2. The utility model is provided with a residual smoke filtering component for a power generation boiler. After the residual smoke is discharged from the power generation boiler, it will be filtered first and then sent to the coal injection machine for use, so as to remove particulate matter in the residual smoke and prevent it from entering the coal injection machine and clogging the pipeline. The impurity filter cartridge can be disassembled to facilitate cleaning and unblocking of the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model as a whole viewed from the front;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the utility model from a top view;

[0019] Figure 3 It is a three-dimensional structural schematic diagram of the residual smoke guide component of the power generation boiler of the utility model;

[0020] Figure 4 This is a schematic diagram of the explosion structure of the residual smoke filtering component of the power generation boiler of the utility model;

[0021] Figure 5 It is a three-dimensional structural schematic diagram of a partially opened state of the connecting component of the utility model.

[0022] In the figure: 1. residual smoke guide assembly of power generation boiler; 2. residual smoke filter assembly of power generation boiler; 3. connection assembly; 4. chimney of power generation boiler; 101. first smoke duct; 102. first induced draft fan; 103. second smoke duct; 104. first valve; 105. second valve; 106. smoke exhaust chimney; 107. third smoke duct; 108. fourth smoke duct; 109. fifth smoke duct; 110. second induced draft fan; 111. heating furnace; 112. 2. Air supply mechanism of coal injection machine; 113. Main body of coal injection machine; 201. Impurity filter cartridge; 202. Filter bag; 203. First sealing gasket; 204. First threaded ring; 205. Limiting nut; 206. Second threaded ring; 207. Smoke supply pipe; 301. Residual smoke collecting tube; 302. Insert pipe mouth; 303. Second sealing gasket; 304. First mounting flange; 305. Fixing bolt; 306. Fixing nut; 307. Second mounting flange. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] like Figure 1 As shown, a device for using the waste heat of exhaust gas from a power generation boiler for coal injection comprises a waste smoke guide assembly 1 for a power generation boiler, a waste smoke filter assembly 2 for a power generation boiler is installed at the end of the waste smoke guide assembly 1, a connecting assembly 3 is arranged on the side of the waste smoke filter assembly 2, and a waste smoke chimney 4 for a power generation boiler is fixedly connected to the bottom of the connecting assembly 3.

[0026] like Figure 3As shown, the device for using the waste heat of exhaust gas from a power generation boiler for coal injection, the waste smoke guide assembly 1 of the power generation boiler is used to transport the waste smoke generated by the power generation boiler to the coal injection machine for recycling and utilization, so as to save resources, the waste smoke guide assembly 1 of the power generation boiler comprises a first smoke passage duct 101, a first induced draft fan 102 is installed at the end of the first smoke passage duct 101, and a second smoke passage duct 103 is connected to the side of the first induced draft fan 102, a first valve 104 is installed on the top of the second smoke passage duct 103, and a second valve 105 is arranged on the side of the first valve 104, and a second valve 105 is arranged on the side of the first valve 104, and a first valve 106 is arranged on the side of the first valve 106. One end of the second smoke duct 103 is connected to a smoke exhaust chimney 106, and the other end of the second smoke duct 103 is connected to a third smoke duct 107, one side of the third smoke duct 107 is connected to a fourth smoke duct 108, and the other side of the third smoke duct 107 is connected to a fifth smoke duct 109, a second induced draft fan 110 is installed inside the fifth smoke duct 109, and a heating furnace 111 is arranged on the side of the second induced draft fan 110, and the end of the fifth smoke duct 109 is connected to a coal injection machine air supply mechanism 112, and the coal injection machine air supply mechanism 112 is connected to the coal injection machine air supply mechanism 113. A coal injection machine body 113 is installed on the side of the air mechanism 112, the first smoke duct 101 is connected to the smoke exhaust chimney 106 through the second smoke duct 103, the first smoke duct 101 is connected to the third smoke duct 107 through the second smoke duct 103, the third smoke duct 107 is connected to the coal injection machine air supply mechanism 112 through the fifth smoke duct 109, the second induced draft fan 110, and the heating furnace 111, and the third smoke duct 107 is connected to the coal injection machine air supply mechanism 112 through the fourth smoke duct 108. 2 constitutes a connecting structure, which can guide the residual smoke containing a large amount of heat generated during the operation of the power generation boiler to the coal injection machine through a pipeline for use, so as to assist it in drying the coal powder, so as to facilitate the recycling of the residual smoke, reduce heat emissions, and protect the environment. At the same time, the recycling of the residual heat is also convenient for saving resources. In addition, a multi-stage pipeline is provided, which can adjust whether the residual smoke is used directly or after heating according to the water seal content in the coal powder, so as to improve its flexibility and enable the residual smoke to better serve the coal powder drying.

[0027] like Figure 4As shown, the device for coal injection is used for the waste heat of the exhaust gas of the power generation boiler, and the residual smoke filtering component 2 of the power generation boiler is used to filter and clean the particulate matter in the residual smoke. The residual smoke filtering component 2 of the power generation boiler includes an impurity filter cartridge 201, and the interior of the impurity filter cartridge 201 is fixedly connected with a filter bag 202, and the end of the impurity filter cartridge 201 is fixedly connected with a first sealing gasket 203, the outer wall of the impurity filter cartridge 201 is integrally connected with a first thread ring 204, and the external thread of the first thread ring 204 is connected with a limiting nut 205, the top of the limiting nut 205 is threadedly connected with a second thread ring 206, and the inner wall of the second thread ring 206 is integrally connected with a smoke delivery pipe 207, the smoke delivery pipe 207 forms a connecting structure with the first smoke passage 101 through the impurity filter cartridge 201, and the smoke delivery pipe 207 forms a detachable structure with the smoke delivery pipe 207 through the first threaded ring 204, the limiting nut 205, and the second threaded ring 206, and two limiting nuts 205 are symmetrically arranged about the horizontal center axis of the impurity filter cartridge 201. After the residual smoke is discharged from the power generation boiler, it will be filtered first and then sent to the coal injection machine for use, so as to remove the particulate matter in the residual smoke and prevent it from entering the coal injection machine and clogging the pipeline, and the impurity filter cartridge 201 can be disassembled, so as to clean and dredge the filter bag 202.

[0028] like Figure 5 As shown, the device for using the waste heat of exhaust gas from a power generation boiler for coal injection, the connecting component 3 includes a waste smoke collecting tube 301, the bottom end of the waste smoke collecting tube 301 is connected to an insertion nozzle 302, and the outer wall of the insertion nozzle 302 is fixedly connected to a second sealing gasket 303, the outside of the waste smoke collecting tube 301 is fixedly connected to a first mounting flange 304, and a fixing bolt 305 penetrates the side of the first mounting flange 304, the end of the fixing bolt 305 is threadedly connected to a fixing nut 306, and the top of the fixing nut 306 is tightly fitted with a second mounting flange 307, the insertion nozzle 302 and the chimney 4 of the power generation boiler form a nested structure, the first mounting flange 304 and the second mounting flange 307 form a detachable structure through the fixing bolts 305 and the fixing nuts 306, and the second mounting flange 307 and the chimney 4 of the power generation boiler are fixedly connected.

[0029] Working principle: The smoke generated during the operation of the power generation boiler will be discharged upward through the power generation boiler chimney 4. The residual smoke collecting tube 301 at the top of the power generation boiler chimney 4 will collect the smoke and transport it to the smoke delivery pipe 207. Then, it will pass through the power generation boiler residual smoke filtering component 2 and be transported to the inside of the second smoke passage 103. When the smoke passes through the impurity filter cylinder 201, the filter bag 202 inside it will filter the smoke and use the fibers in the bag to filter out some particulate matter in the smoke. After long-term use, when there are more impurities left in the filter bag 202, the limit nut 205 can be rotated to make the thread on the inner wall of the limit nut 205 disengage from the first thread circle 204. Then, the impurity filter cylinder 201 can be removed, and then the filter bag 202 inside it can be cleaned.

[0030] The residual smoke after filtration enters the second smoke duct 103 under the action of the first induced draft fan 102. When the coal injection device is not started, the second valve 105 can be opened to discharge the residual smoke into the air through the smoke exhaust chimney 106. When the coal injection machine is running and the coal powder inside needs to be dried, the first valve 104 can be opened to introduce the residual smoke into the third smoke duct 107. In spring, autumn and winter, the moisture content in the coal powder is low, and the heat contained in the residual smoke itself is sufficient to dry the coal powder. At this time, the valve close to the fourth smoke duct 108 can be opened to directly introduce the residual smoke into the coal injection machine air supply mechanism 112 through the fourth smoke duct 108 for use. In summer, the moisture content in the coal powder is higher. At this time, the valve close to the fifth smoke duct 109 can be opened to allow the residual smoke to be introduced into the coal injection machine air supply mechanism 112 for use after being reheated by the heating furnace 111.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A device for using waste heat from exhaust gas of power generation boiler for coal injection, characterized in that: It comprises a power generation boiler residual smoke guide assembly (1), a power generation boiler residual smoke filter assembly (2) is installed at the end of the power generation boiler residual smoke guide assembly (1), a connecting assembly (3) is arranged on the side of the power generation boiler residual smoke filter assembly (2), and the bottom of the connecting assembly (3) is fixedly connected to the power generation boiler chimney (4); The residual smoke guide assembly (1) of the power generation boiler comprises a first smoke passage duct (101), a first induced draft fan (102) is installed at the end of the first smoke passage duct (101), and a second smoke passage duct (103) is connected to the side of the first induced draft fan (102), a first valve (104) is installed at the top of the second smoke passage duct (103), and a second valve (105) is arranged on the side of the first valve (104), one end of the second smoke passage duct (103) is connected to a smoke exhaust chimney (106), and the other end of the second smoke passage duct (103) is connected to a A third smoke duct (107), one side of the third smoke duct (107) is connected to a fourth smoke duct (108), and the other side of the third smoke duct (107) is connected to a fifth smoke duct (109), a second induced draft fan (110) is installed inside the fifth smoke duct (109), and a heating furnace (111) is arranged on the side of the second induced draft fan (110), an end of the fifth smoke duct (109) is connected to a coal injection machine air supply mechanism (112), and a coal injection machine body (113) is installed on the side of the coal injection machine air supply mechanism (112).

2. The device for using waste heat from exhaust gas of power generation boiler for coal injection according to claim 1, characterized in that: The first smoke duct (101) forms a communication structure with the smoke exhaust chimney (106) through the second smoke duct (103), and the first smoke duct (101) forms a communication structure with the third smoke duct (107) through the second smoke duct (103).

3. The device for using waste heat from exhaust gas of power generation boiler for coal injection according to claim 1, characterized in that: The third smoke duct (107) forms a communication structure with the coal injection machine air supply mechanism (112) via the fifth smoke duct (109), the second induced draft fan (110), the heating furnace (111), and the third smoke duct (107) forms a communication structure with the coal injection machine air supply mechanism (112) via the fourth smoke duct (108).

4. The device for using waste heat from exhaust gas of power generation boiler for coal injection according to claim 1, characterized in that: The power generation boiler residual smoke filtering assembly (2) comprises an impurity filter cartridge (201), the interior of the impurity filter cartridge (201) is fixedly connected to a filter bag (202), and the end of the impurity filter cartridge (201) is fixedly connected to a first sealing gasket (203), the outer wall of the impurity filter cartridge (201) is integrally connected to a first threaded ring (204), and the outer thread of the first threaded ring (204) is connected to a limiting nut (205), the top of the limiting nut (205) is threadedly connected to a second threaded ring (206), and the inner wall of the second threaded ring (206) is integrally connected to a smoke delivery pipe (207).

5. The device for using waste heat from exhaust gas of power generation boiler for coal injection according to claim 4, characterized in that: The smoke delivery pipe (207) forms a connecting structure with the first smoke passage pipe (101) through the impurity filter cartridge (201), and the smoke delivery pipe (207) forms a detachable structure with the smoke delivery pipe (207) through the first thread ring (204), the limiting nut (205), and the second thread ring (206), and two limiting nuts (205) are symmetrically arranged about the horizontal center axis of the impurity filter cartridge (201).

6. The device for using waste heat from exhaust gas of power generation boiler for coal injection according to claim 1, characterized in that: The connecting assembly (3) comprises a residual smoke collecting tube (301), the bottom end of the residual smoke collecting tube (301) is connected to an insertion pipe opening (302), and the outer wall of the insertion pipe opening (302) is fixedly connected to a second sealing gasket (303), the outside of the residual smoke collecting tube (301) is fixedly connected to a first mounting flange (304), and a fixing bolt (305) passes through the side of the first mounting flange (304), the end of the fixing bolt (305) is threadedly connected to a fixing nut (306), and the top of the fixing nut (306) is tightly fitted with the second mounting flange (307).

7. The device for using waste heat from exhaust gas of power generation boiler for coal injection according to claim 6, characterized in that: The insertion pipe opening (302) and the power generation boiler chimney (4) form a nested structure, the first mounting flange (304) and the second mounting flange (307) form a detachable structure through fixing bolts (305) and fixing nuts (306), and the second mounting flange (307) and the power generation boiler chimney (4) are fixedly connected.

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