Boiler blow-off recovery device for thermal power plant

Abstract

The utility model relates to the technical field of boiler sewage recovery, and discloses a thermal power plant boiler blow-off recovery device which comprises a bottom plate and a treatment box, a filtering mechanism extending to the top of the treatment box is arranged in the treatment box, and a waste heat recovery mechanism fixedly connected with the treatment box is arranged at the top of the bottom plate. According to the thermal power plant boiler blow-off recovery device, sewage generated by a boiler of an electric power plant is introduced into the treatment box from the water inlet pipe, impurities in the sewage can be filtered out through the filter plate, filtered water is discharged from the drainage pipe, when many impurities are accumulated on the filter plate, the electric push rod is started to retract the output end of the electric push rod, and under transmission of the connecting rod, the sewage is recycled. The mounting base is pulled to move upwards, a first scraping plate and a second scraping plate scrape impurities attached to the inner walls of the filter plate and the treatment box in the upward moving process, the scraped impurities fall into a frame defined by the mounting base, the first scraping plate and the second scraping plate, and pouring of the impurities is achieved by inserting a sealing cover; and the advantage that the filtered impurities are convenient to clean is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler sewage recovery, in particular to a boiler sewage recovery device for a thermal power plant. Background Art

[0002] The boiler of a thermal power plant is the core equipment used for power generation and heat supply in a thermal power plant. It uses the heat energy generated by combustion to heat water into steam, thereby driving the steam turbine to generate electricity, and can directly use part of the heat energy for heating. Boiler blowdown is an important part of the operation of the boiler in a thermal power plant. Its main purpose is to discharge part of the boiler water contaminated by salt and water slag in the boiler to maintain the boiler water quality and safe operation of the boiler.

[0003] The wastewater in the boiler generally contains more impurities. If it is discharged directly, it will have an adverse effect on the environment. Therefore, it is often necessary to filter the wastewater first. However, the filter holes of the commonly used filter net are easily blocked after long-term use, which affects the subsequent filtering effect. In addition, the water temperature of boiler wastewater is usually above 100 degrees Celsius. Direct discharge wastes heat sources. Therefore, a thermal power plant boiler wastewater recovery device is proposed to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of the utility model is to provide a boiler wastewater recovery device for a thermal power plant to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a boiler wastewater recovery device for a thermal power plant comprises a bottom plate and a processing box, wherein a filtering mechanism extending to the top of the processing box is arranged inside the processing box, and a waste heat recovery mechanism fixedly connected to the processing box is arranged on the top of the bottom plate;

[0006] The filtering mechanism includes a mounting frame, a filter plate is fixedly connected to the interior of the mounting frame, a cover is movably connected to the top of the processing box, an electric push rod is fixedly connected to the top of the cover, a connecting rod is fixedly connected to the output end of the electric push rod, a mounting seat is fixedly connected to the bottom of the connecting rod, a first scraper is fixedly connected to the top of the mounting seat, and a second scraper is fixedly connected to the top of the mounting seat.

[0007] Preferably, the treatment box is fixedly connected to the top of the base plate, a water inlet pipe is fixedly connected to the left side of the inner wall of the treatment box, a drain pipe is fixedly connected to the inner bottom wall of the treatment box, and two support legs are fixedly connected to the bottom of the treatment box and on the left and right sides of the drain pipe and are symmetrically distributed front to back.

[0008] Preferably, the installation frame is located inside the processing box, the front and rear sides of the installation frame are fixedly connected with guide blocks, the front and rear sides of the inner wall of the processing box are provided with installation grooves adapted to the guide blocks, and the installation groove is located on the left side of the drain pipe.

[0009] Through the above technical scheme, with the coordinated use of the guide block and the mounting groove, the mounting frame can be disassembled and assembled, thereby achieving the purpose of replacing the filter plate. The mounting groove is located on the left side of the drain pipe to ensure that the filter plate is located on the left side of the drain pipe. The boiler sewage first passes through the filter plate to filter out impurities and then is discharged from the drain pipe.

[0010] Preferably, the output end of the electric push rod extends to the bottom of the cover, and the connecting rod is located on the left side of the installation frame.

[0011] Preferably, the number of the first scrapers is two and they are relatively distributed left and right, the first scraper on the right side is in contact with the filter plate, the first scraper on the left side is in contact with the left side of the inner wall of the processing box, the number of the second scrapers is two and they are symmetrically distributed front to back, the second scraper on the front side is in contact with the front side of the inner wall of the processing box, and the second scraper on the rear side is in contact with the rear side of the inner wall of the processing box.

[0012] Through the above technical solution, the first scraper and the second scraper are moved from bottom to top, so as to scrape off the impurities attached to the inner wall of the processing box and the filter plate, thereby preventing the filter holes of the filter plate from being blocked.

[0013] Preferably, the waste heat recovery mechanism comprises a water tank, the inner wall of which is filled with thermal insulation cotton, and an annular pipe is fixedly connected to the outer side of the treatment box.

[0014] Through the above technical solution, the filling of the thermal insulation cotton can keep the water in the water tank warm and prevent the water temperature from dropping too quickly.

[0015] Preferably, the water tank is fixedly connected to the top of the base plate and is located on the right side of the treatment box, the annular pipe is connected to the water tank, a connecting pipe is fixedly connected to one side of the annular pipe, and a water outlet pipe is fixedly connected to the right side of the inner wall of the water tank.

[0016] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0017] First, the utility model passes the sewage generated by the boiler of the electric heating plant into the treatment box from the water inlet pipe, and the impurities in the sewage can be filtered out through the filter plate, and the filtered water is discharged from the drain pipe. When a large amount of impurities are accumulated on the filter plate, the electric push rod is started to retract its output end, and the mounting seat is pulled up under the transmission of the connecting rod. During the upward movement, the first scraper and the second scraper respectively scrape off the impurities attached to the filter plate and the inner wall of the treatment box, and the scraped impurities fall into the frame surrounded by the mounting seat, the first scraper and the second scraper. The impurities are dumped by inserting the cover, so that the filtered impurities are easy to clean.

[0018] Second, the utility model generally uses a relatively high temperature of sewage discharged from boilers in electric power plants. The tap water is passed from the connecting pipe into the annular pipe, and the high-temperature boiler sewage in the treatment box is used to heat the tap water. The heated tap water is stored in the water tank and insulated by thermal insulation cotton. When needed, it can be taken from the water outlet pipe, thereby achieving the benefit of waste heat recovery from boiler sewage in thermal power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the processing box of the utility model;

[0021] Figure 3 It is a three-dimensional schematic diagram of the connection between the connecting rod and the mounting seat of the utility model;

[0022] Figure 4 It is a cutaway schematic diagram of the water tank of the utility model.

[0023] Among them: 1. bottom plate; 2. treatment box; 3. filter mechanism; 4. waste heat recovery mechanism; 31. installation frame; 311. guide block; 312. installation groove; 32. filter plate; 33. cover; 34. electric push rod; 35. connecting rod; 36. mounting seat; 37. first scraper; 38. second scraper; 41. water tank; 42. thermal insulation cotton; 43. annular pipe; 431. connecting pipe. DETAILED DESCRIPTION

[0024] 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.

[0025] The utility model provides the following technical solutions:

[0026] Embodiment 1

[0027] See also Figure 1 , Figure 2 and Figure 3 The boiler sewage recovery device of a thermal power plant includes a bottom plate 1 and a treatment box 2. The treatment box 2 is fixedly connected to the top of the bottom plate 1. The left side of the inner wall of the treatment box 2 is fixedly connected with an inlet pipe. The inner bottom wall of the treatment box 2 is fixedly connected with a drain pipe. The bottom of the treatment box 2 and the left and right sides of the drain pipe are fixedly connected with two supporting legs that are symmetrically distributed front and back. The inside of the treatment box 2 is movably connected with a filtering mechanism 3 extending to the top thereof. The filtering mechanism 3 includes a mounting frame 31. The inside of the mounting frame 31 is fixedly connected with a filter plate 32. The top of the treatment box 2 is movably connected with a cover 33. The top of the cover 33 is fixedly connected with an electric push rod 34. The output end of the electric push rod 34 is fixedly connected with a connecting rod 35. The bottom of the connecting rod 35 is fixedly connected with a mounting seat 36. The top of the mounting seat 36 is fixedly connected with a first scraper 37, a second scraper 38 is fixedly connected to the top of the mounting seat 36, the mounting frame 31 is located inside the processing box 2, and the front and rear sides of the mounting frame 31 are fixedly connected with guide blocks 311. The front and rear sides of the inner wall of the processing box 2 are provided with mounting grooves 312 adapted to the guide blocks 311, and the mounting groove 312 is located on the left side of the drain pipe. The output end of the electric push rod 34 extends to the bottom of the cover 33, and the connecting rod 35 is located on the left side of the mounting frame 31. The number of the first scraper 37 is two and they are relatively distributed left and right. The first scraper 37 on the right side is in contact with the filter plate 32, and the first scraper 37 on the left side is in contact with the left side of the inner wall of the processing box 2. The number of the second scraper 38 is two and they are symmetrically distributed front and back. The front second scraper 38 is in contact with the front side of the inner wall of the processing box 2, and the rear second scraper 38 is in contact with the rear side of the inner wall of the processing box 2.

[0028] Through the above technical solution, the sewage generated by the boiler of the electric heating plant is introduced into the treatment box 2 through the water inlet pipe, and the impurities in the sewage can be filtered out through the filter plate 32, and the filtered water is discharged from the drain pipe. When a large amount of impurities are accumulated on the filter plate 32, the electric push rod 34 is started to retract its output end, and the mounting seat 36 is pulled up under the transmission of the connecting rod 35. During the upward movement, the first scraper 37 and the second scraper 38 respectively scrape off the impurities attached to the filter plate 32 and the inner wall of the treatment box 2, and the scraped impurities fall into the frame surrounded by the mounting seat 36, the first scraper 37 and the second scraper 38. The impurities are dumped by inserting the cover 33, so that the filtered impurities are easy to clean.

[0029] Embodiment 2

[0030] See also Figure 1 and Figure 4, and on the basis of Example 1, it is further obtained that: the top of the bottom plate 1 is fixedly connected with a waste heat recovery mechanism 4 fixedly connected to the treatment box 2, the waste heat recovery mechanism 4 includes a water tank 41, the inner wall of the water tank 41 is filled with insulation cotton 42, the outer side of the treatment box 2 is fixedly connected with an annular pipe 43, the water tank 41 is fixedly connected to the top of the bottom plate 1 and is located on the right side of the treatment box 2, the annular pipe 43 is connected to the water tank 41, one side of the annular pipe 43 is fixedly connected with a connecting pipe 431, and the right side of the inner wall of the water tank 41 is fixedly connected with a water outlet pipe.

[0031] Through the above technical scheme, the temperature of sewage discharged from the boiler of a general electric power plant is relatively high. The tap water is passed from the connecting pipe 431 into the annular pipe 43, and the tap water is heated by the high-temperature boiler sewage in the treatment box 2. The heated tap water is stored in the water tank 41 and is insulated by the insulation cotton 42. When needed, it can be taken from the water outlet pipe, thereby achieving the benefit of waste heat recovery of boiler sewage in thermal power plants.

[0032] In actual operation, when this device is in use, first start the electric push rod 34 to place the mounting seat 36 on the inner bottom wall of the treatment box 2, then discharge the boiler sewage of the thermal power plant into the treatment box 2 from the water inlet pipe, and filter the impurities in the sewage through the filter plate 32. By moving the mounting seat 36 upward, under the action of the first scraper 37 and the second scraper 38, the impurities attached to the inner wall of the treatment box 2 and the filter plate 32 are scraped off, and tap water is poured into the connecting pipe 431. The high-temperature sewage heats the tap water in the annular pipe 43 and stores the heated tap water in the water tank 41. The insulation cotton 42 is used to keep the heated tap water warm. When needed, the tap water is taken from the outlet pipe in the water tank 41 for use, thereby achieving the purpose of recovering the waste heat of the boiler sewage.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A boiler wastewater recovery device for a thermal power plant, comprising a bottom plate (1) and a treatment box (2), characterized in that: The processing box (2) is provided with a filtering mechanism (3) extending to the top thereof, and the top of the bottom plate (1) is provided with a waste heat recovery mechanism (4) fixedly connected to the processing box (2); The filtering mechanism (3) comprises a mounting frame (31), the interior of which is fixedly connected to a filtering plate (32), the top of the processing box (2) is movably connected to a sealing cover (33), the top of the sealing cover (33) is fixedly connected to an electric push rod (34), the output end of the electric push rod (34) is fixedly connected to a connecting rod (35), the bottom of the connecting rod (35) is fixedly connected to a mounting seat (36), the top of the mounting seat (36) is fixedly connected to a first scraper (37), and the top of the mounting seat (36) is fixedly connected to a second scraper (38).

2. The thermal power plant boiler wastewater recovery device according to claim 1 is characterized in that: The treatment box (2) is fixedly connected to the top of the base plate (1); a water inlet pipe is fixedly connected to the left side of the inner wall of the treatment box (2); a drainage pipe is fixedly connected to the inner bottom wall of the treatment box (2); and two support legs are fixedly connected to the bottom of the treatment box (2) and located on the left and right sides of the drainage pipe and are symmetrically distributed front to back.

3. The thermal power plant boiler wastewater recovery device according to claim 2 is characterized in that: The installation frame (31) is located inside the treatment box (2); guide blocks (311) are fixedly connected to the front and rear sides of the installation frame (31); installation grooves (312) adapted to the guide blocks (311) are provided on the front and rear sides of the inner wall of the treatment box (2); and the installation groove (312) is located on the left side of the drain pipe.

4. The thermal power plant boiler wastewater recovery device according to claim 1, characterized in that: The output end of the electric push rod (34) extends to the bottom of the cover (33), and the connecting rod (35) is located on the left side of the installation frame (31).

5. The thermal power plant boiler wastewater recovery device according to claim 1, characterized in that: The number of the first scrapers (37) is two and they are relatively distributed on the left and right sides. The first scraper (37) on the right side is in contact with the filter plate (32), and the first scraper (37) on the left side is in contact with the left side of the inner wall of the processing box (2). The number of the second scrapers (38) is two and they are symmetrically distributed front to back. The second scraper (38) on the front side is in contact with the front side of the inner wall of the processing box (2), and the second scraper (38) on the rear side is in contact with the rear side of the inner wall of the processing box (2).

6. The thermal power plant boiler wastewater recovery device according to claim 1, characterized in that: The waste heat recovery mechanism (4) comprises a water tank (41), the inner wall of the water tank (41) is filled with thermal insulation cotton (42), and the outer side of the processing box (2) is fixedly connected with an annular pipe (43).

7. The thermal power plant boiler wastewater recovery device according to claim 6, characterized in that: The water tank (41) is fixedly connected to the top of the bottom plate (1) and is located on the right side of the treatment tank (2); the annular pipe (43) is connected to the water tank (41); a connecting pipe (431) is fixedly connected to one side of the annular pipe (43); and a water outlet pipe is fixedly connected to the right side of the inner wall of the water tank (41).

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