Thermal power plant boiler slag recovery device

Abstract

The utility model belongs to the technical field of thermal power plants, and discloses a thermal power plant boiler slag recovery device which comprises a combustion mechanism used for combusting downward-flowing slag and further comprises a lower box mechanism installed at the bottom of the combustion mechanism and used for converging the slag to be discharged, and a slag discharging mechanism used for spirally pushing the slag to be discharged is installed in the middle of the lower box mechanism. The lower box mechanism is detachably connected with the combustion mechanism; the box discharging mechanism comprises a flow guide box, a conveying channel is arranged at the bottom of the flow guide box, a discharging pipe is arranged at the bottom of one end of the conveying channel, and a lower connecting edge is arranged on the circumference of the top of the flow guide box. According to the boiler slag recovery device for the thermal power plant, the flow guide box with the wide upper part and the narrow lower part is arranged, so that slag convergence is ensured, and the slag recovery effect is improved; through up-and-down disassembly and connection, disassembly, assembly, repair and maintenance are facilitated; and through the arrangement of deslagging at the bottom of the end head, the entering of unreliable air is reduced, and the combustion stability of the boiler is ensured.

Description

Technical Field

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

[0002] Slag generated by thermal power plants is an industrial solid waste, primarily composed of silicon dioxide, aluminum oxide, iron oxide, calcium oxide, and magnesium oxide. Recycled slag can be used in a variety of ways, including as a building material and road construction, soil improvement, water treatment, pollution control, and as a raw material in industrial production.

[0003] In comparison, the Chinese patent with announcement number CN110594766A discloses an automatic slag discharge device for a combustion furnace in a thermal power plant, comprising a base, a combustion mechanism, a slag discharge mechanism and an induction mechanism, wherein the combustion mechanism is arranged above the base, the slag discharge mechanism is arranged on the right side of the base and the combustion mechanism, and the induction mechanism is arranged between the base and the combustion mechanism; the combustion mechanism comprises a combustion furnace body, a slag filter plate is provided on the inner wall of the combustion furnace body, and a slag discharge port is opened on the left side of the combustion furnace body; the slag discharge mechanism comprises a motor, a driving shaft is provided on the output shaft of the motor, a driving wheel is provided on the right side of the driving shaft, a driven wheel for use with the driving wheel is provided at the bottom of the right side of the combustion furnace body and corresponding to the position of the driving wheel, the driving wheel and the driven wheel are connected by a belt drive, a conveying roller is provided on the left side of the driven wheel, and the left side of the conveying roller passes through the combustion furnace body and extends into the interior thereof.

[0004] However, the above patent adopts the combination of plane and spiral pushing, and the slag is easily accumulated on both sides of the conveying roller, which reduces the slag discharge effect. Therefore, a new equipment needs to be designed. Utility Model Content

[0005] The purpose of the utility model is to provide a slag recovery device for a thermal power plant boiler to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A slag recovery device for a thermal power plant boiler comprises a combustion mechanism for burning downstream slag, and also comprises a lower box mechanism installed at the bottom of the combustion mechanism for gathering the slag for discharge, a slag discharge mechanism for spirally pushing the slag for discharge is installed in the middle of the lower box mechanism, and the lower box mechanism and the combustion mechanism are connected by disassembly and assembly; the lower box mechanism comprises a guide box, the guide box adopts a structure that is wide at the top and narrow at the bottom, a conveying path is provided at the bottom of the guide box, a discharge pipe is provided at the bottom of one end of the conveying path, and a lower connecting edge is provided on the top circumference of the guide box; the slag discharge mechanism comprises a transmission shaft, an electric motor is provided at one end of the transmission shaft, and spiral blades are provided on the circumference of the transmission shaft.

[0008] Furthermore: the combustion mechanism includes a combustion furnace body, a slag filter plate is arranged in the combustion furnace body, an air intake pipe is arranged near the bottom of the slag filter plate, an air intake valve is installed on the air intake pipe, and an upper connecting edge is arranged on the circumference of the bottom of the combustion furnace body.

[0009] Furthermore: the upper connecting edge and the lower connecting edge are connected by bolts, and there are 7 evenly distributed intake pipes.

[0010] Furthermore, the lower connecting edge, the guide box and the conveying channel are integrally formed and made of Q345 steel material.

[0011] Furthermore: the cross-sectional shape of the guide box is an inverted trapezoid.

[0012] Furthermore: the spiral blades and the transmission shaft are welded together, and the transmission shaft is connected to the guide box bearing.

[0013] Compared with the prior art, the beneficial effects are:

[0014] 1. The setting of the guide box with a wide top and narrow bottom ensures the slag convergence and improves the slag recovery effect;

[0015] 2. The upper and lower disassembly and connection settings make it easy to disassemble, repair and maintain;

[0016] 3. The setting of slag discharge at the bottom of the end reduces the entry of unreliable air and ensures the stability of boiler combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a thermal power plant boiler slag recovery device according to the utility model;

[0018] Figure 2 This is a schematic diagram of the combustion mechanism of a thermal power plant boiler slag recovery device described in the utility model;

[0019] Figure 3 This is a schematic diagram of the lower box mechanism of a thermal power plant boiler slag recovery device described in the utility model;

[0020] Figure 4 The utility model is a schematic diagram of a slag discharge mechanism of a slag recovery device for a thermal power plant boiler.

[0021] In the accompanying drawings, 101 is the combustion furnace body; 102 is the slag filter plate; 103 is the air inlet pipe; 104 is the air inlet valve; 105 is the upper connecting edge; 201 is the guide box; 202 is the conveying path; 203 is the discharge pipe; 204 is the lower connecting edge; 301 is the motor; 302 is the transmission shaft; 303 is the spiral blade. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1-4 A slag recovery device for a thermal power plant boiler includes a combustion mechanism for burning downstream slag, and a lower box mechanism installed at the bottom of the combustion mechanism for collecting the slag and discharging it. A slag discharge mechanism for spirally pushing the slag out is installed in the middle of the lower box mechanism, and the lower box mechanism and the combustion mechanism are connected by disassembly and assembly.

[0024] In this embodiment, the combustion mechanism includes a combustion furnace body 101, a slag filter plate 102 is provided in the combustion furnace body 101, an air inlet pipe 103 is provided near the bottom of the slag filter plate 102 of the combustion furnace body 101, 7 air inlet pipes 103 are evenly distributed, and an air inlet valve 104 is installed on the air inlet pipe 103. An upper connecting edge 105 is provided on the circumference of the bottom of the combustion furnace body 101. The upper connecting edge 105 and the lower connecting edge 204 are bolted together to facilitate the disassembly and assembly of the lower box mechanism. When the air inlet valve 104 is opened, compressed air enters the combustion furnace body 101 from the air inlet pipe 103, passes through the slag filter plate 102 to support combustion, and the slag passes through the slag filter plate 102 and falls into the guide box 201;

[0025] In this embodiment: the lower box mechanism includes a guide box 201, which adopts a structure that is wide at the top and narrow at the bottom. The cross-section of the guide box 201 is an inverted trapezoid. A conveying path 202 is provided at the bottom of the guide box 201, and a discharge pipe 203 is provided at the bottom of one end of the conveying path 202. A lower connecting edge 204 is provided on the top circumference of the guide box 201. The lower connecting edge 204, the guide box 201 and the conveying path 202 are integrally formed and made of Q345 steel. The slag falls into the guide box 201 and slides down along the inner wall of the guide box 201 into the conveying path 202, and is discharged from the discharge pipe 203 at one end of the bottom of the conveying path 202.

[0026] In this embodiment: the slag discharge mechanism includes a transmission shaft 302, the transmission shaft 302 is connected to the guide box 201 bearing, an electric motor 301 is provided at one end of the transmission shaft 302, and spiral blades 303 are provided on the circumference of the transmission shaft 302. The spiral blades 303 and the transmission shaft 302 are welded together, and the motor 301 drives the spiral blades 303 to rotate through the transmission shaft 302, thereby pushing the slag to move along the conveyor path 202.

[0027] Working principle: Open the air intake valve 104 to allow compressed air to enter the combustion furnace body 101 from the air intake pipe 103, pass through the slag filter plate 102 to support combustion, and the slag passes through the slag filter plate 102 and falls into the guide box 201, and slides down along the inner wall of the guide box 201 into the conveying path 202. At the same time, the guide box 201 supports the motor 301 to drive the spiral blade 303 to rotate through the transmission shaft 302, pushing the slag to move along the conveying path 202 and be discharged from the discharge pipe 203 at one end of the bottom of the conveying path 202.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A slag recovery device for a thermal power plant boiler, comprising a combustion mechanism for burning downstream slag, characterized in that: It also includes a lower box mechanism installed at the bottom of the combustion mechanism for collecting slag and discharging it, a slag discharge mechanism for spirally pushing the slag and discharging it is installed in the middle of the lower box mechanism, and the lower box mechanism and the combustion mechanism are connected by disassembly; The lower box mechanism comprises a flow guide box (201), the flow guide box (201) adopts a structure that is wide at the top and narrow at the bottom, a conveying path (202) is arranged at the bottom of the flow guide box (201), a discharge pipe (203) is arranged at the bottom of one end of the conveying path (202), and a lower connecting edge (204) is arranged on the circumference of the top of the flow guide box (201); The slag discharge mechanism comprises a transmission shaft (302), one end of the transmission shaft (302) is provided with a motor (301), and the circumference of the transmission shaft (302) is provided with spiral blades (303); The combustion mechanism comprises a combustion furnace body (101), a slag filter plate (102) is arranged inside the combustion furnace body (101), an air intake pipe (103) is arranged near the bottom of the slag filter plate (102) of the combustion furnace body (101), an air intake valve (104) is installed on the air intake pipe (103), and an upper connecting edge (105) is arranged on the circumference of the bottom of the combustion furnace body (101).

2. A thermal power plant boiler slag recovery device according to claim 1, characterized in that: The upper connecting edge (105) and the lower connecting edge (204) are connected by bolts, and seven intake pipes (103) are evenly distributed.

3. A thermal power plant boiler slag recovery device according to claim 1, characterized in that: The lower connecting edge (204), the guide box (201) and the conveying channel (202) are integrally formed and made of Q345 steel material.

4. A thermal power plant boiler slag recovery device according to claim 1, characterized in that: The cross-sectional shape of the flow guide box (201) is an inverted trapezoid.

5. A thermal power plant boiler slag recovery device according to claim 1, characterized in that: The spiral blade (303) and the transmission shaft (302) are welded together, and the transmission shaft (302) and the guide box (201) are bearing-connected.

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