Power plant fuel management device

Abstract

The utility model discloses a power plant fuel management device which comprises a management box and further comprises a management assembly arranged in the management box and used for controlling and managing the surface temperature of pulverized coal fuel, the management assembly comprises a first multi-way pipe arranged on one side of the management box, and an air inlet pipe is arranged on the side, away from the management box, of the first multi-way pipe. An air heater is arranged at the end, away from the first multi-way pipe, of the air inlet pipe. Through the arrangement of the management assembly, pulverized coal fuel is preheated before entering the combustion furnace, so that management control over the surface temperature of the pulverized coal fuel is achieved, the preheated pulverized coal fuel can rapidly reach a stable combustion state after entering the combustion furnace, the flammability of the pulverized coal fuel is improved, and the combustion efficiency of the pulverized coal fuel is improved. And the loss of pulverized coal fuel in the combustion process is reduced, so that the fuel expenditure cost of a power plant is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power plant fuel management, in particular to a power plant fuel management device. Background Art

[0002] During the combustion of pulverized coal fuel in thermal power plants, conveyor belts are used to transport pulverized coal. Although automatic transportation of pulverized coal is achieved to ensure the continuity of pulverized coal combustion in the combustion furnace, the lack of management and control over the surface temperature of the pulverized coal causes low-temperature pulverized coal to be transported into the furnace for combustion. The combustion of low-temperature pulverized coal not only leads to a relatively slow combustion speed, but also reduces its combustion completeness, thereby affecting the loss of pulverized coal during the combustion process and increasing the fuel expenditure cost of the power plant.

[0003] Therefore, there is an urgent need for a power plant fuel management device to solve the above problems. Utility Model Content

[0004] The purpose of the present utility model is to provide a fuel management device for a power plant, so as to solve the problem of lack of management and control over the surface temperature of pulverized coal proposed in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a fuel management device for a power plant, comprising a management box, a feed hopper provided at the top of the management box, a stirring rod provided in the feed hopper, and a management component provided in the management box for controlling and managing the surface temperature of pulverized coal fuel;

[0006] The management component includes a first multi-way pipe arranged on one side of the management box, an air inlet pipe is provided on the side of the first multi-way pipe away from the management box, a hot air blower is provided on the end of the air inlet pipe away from the first multi-way pipe, and the management box is provided with a circulation component for recycling hot air and a conveying component for multi-stage conveying of pulverized coal fuel.

[0007] The circulation component includes a second multi-way tube fixedly connected to the side of the management box away from the first multi-way tube, a circulation tube is provided on one side of the second multi-way tube, a connecting tube is provided at the air inlet end of the hot air blower, the other end of the circulation tube is connected to the connecting tube, and a filter plate is provided at the end of the second multi-way tube that communicates with the interior of the management box.

[0008] A temperature detector is provided on the inner wall of the management box.

[0009] The conveying assembly includes multiple conveyor belts arranged in a management box, and the conveyor belts are staggered. Each conveyor belt is set away from the feed hopper and passes through the management box and extends to the combustion furnace. A collecting hopper is provided at the drop point of two adjacent conveyor belts, and the collecting hopper is connected to the inner wall of the management box.

[0010] The management box is provided with an anti-piling assembly for preventing coal powder from accumulating on each conveyor belt. The anti-piling assembly includes an anti-piling plate slidably connected to the side of each conveyor belt close to the coal powder conveying. Each anti-piling plate is provided with a plurality of anti-piling rods on the side close to the coal powder. The management box is provided with a linkage assembly for synchronously moving each anti-piling plate.

[0011] The linkage assembly includes multiple groups of two symmetrically arranged guide rods fixedly connected to the management box, and the side walls of two adjacent guide rods are slidably connected with guide plates, and the opposite sides of the two guide plates are connected to the anti-stacking plate. The side walls of the management box are slidably connected with multiple linkage rods, one end of each linkage rod is connected to the anti-stacking plate, and the other end of each linkage rod is fixedly connected to the linkage plate. A U-shaped plate is fixedly connected to the side of the management box close to the linkage plate, and the U-shaped plate is arranged astride the linkage plate, and a push rod motor is provided on the side away from the management box, and the output end of the push rod motor is connected to the linkage plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model preheats the pulverized coal fuel before entering the combustion furnace through the setting of the management component, thereby realizing the management and control of the surface temperature of the pulverized coal fuel. The preheated pulverized coal fuel can quickly reach a stable combustion state after entering the combustion furnace, which helps to improve the combustibility of the pulverized coal fuel and reduce the loss of the pulverized coal fuel during the combustion process, thereby further reducing the fuel expenditure cost of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the management component structure of the present utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the conveying component of the present utility model;

[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0018] In the figure: 101, management box; 102, feed hopper; 103, stirring rod; 201, first multi-way pipe; 202, air inlet pipe; 203, hot air blower; 301, second multi-way pipe; 302, circulation pipe; 303, connecting pipe; 4, temperature detector; 501, conveyor belt; 502, collecting hopper; 601, anti-piling plate; 602, anti-piling rod; 701, guide rod; 702, guide plate; 703, linkage rod; 704, linkage plate; 705, U-shaped plate; 706, push rod motor. DETAILED DESCRIPTION

[0019] 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.

[0020] Example 1

[0021] See also Figure 1-Figure 4 The fuel management device of a power plant shown in the figure includes a management box 101, a feed hopper 102 is provided at the top of the management box 101, a stirring rod 103 is provided in the feed hopper 102, and a management component is provided in the management box 101 for controlling the surface temperature of the pulverized coal fuel;

[0022] The management component includes a first multi-way pipe 201 provided on one side of the management box 101. An air inlet pipe 202 is provided on the side of the first multi-way pipe 201 away from the management box 101. A hot air blower 203 is provided on the end of the air inlet pipe 202 away from the first multi-way pipe 201. The management box 101 is provided with a circulation component for recycling hot air and a conveying component for multi-stage conveying of pulverized coal fuel.

[0023] It should be noted here that: through the setting of the management component, the pulverized coal fuel is preheated before entering the combustion furnace, thereby realizing the management and control of the surface temperature of the pulverized coal fuel. After the preheated pulverized coal fuel enters the combustion furnace, it can quickly reach a stable combustion state, which helps to improve the combustibility of the pulverized coal fuel and reduce the loss of pulverized coal fuel during the combustion process, thereby further reducing the fuel expenditure cost of the power plant.

[0024] See also Figure 1 and Figure 2 The circulation assembly shown in the figure includes a second multi-way pipe 301 fixedly connected to the side of the management box 101 away from the first multi-way pipe 201, a circulation pipe 302 is provided on one side of the second multi-way pipe 301, a connecting pipe 303 is provided at the air inlet end of the hot air blower 203, the other end of the circulation pipe 302 is connected to the connecting pipe 303, and a filter plate is provided at one end of the second multi-way pipe 301 that communicates with the interior of the management box 101;

[0025] It should be noted here that: by setting up the circulation component, the recycling of hot air is achieved, reducing the waste of heat energy.

[0026] See also Figure 3 and Figure 4 , the inner wall of the management box 101 shown in the figure is provided with a temperature detector 4;

[0027] It should be noted here that the temperature inside the management box 101 is detected by the provision of the temperature detector 4 .

[0028] See also Figure 3 and Figure 4 The conveying assembly shown in the figure includes a plurality of conveyor belts 501 arranged in the management box 101. The conveyor belts 501 are staggered. One of the conveyor belts 501 away from the feed hopper 102 passes through the management box 101 and extends to the combustion furnace. A collecting hopper 502 is provided at the drop-off point of two adjacent conveyor belts 501. The collecting hopper 502 is connected to the inner wall of the management box 101.

[0029] It should be noted here that: through the setting of the conveying component, not only the residence time of the pulverized coal fuel in the management box 101 is increased, and the time it is blown by hot air is prolonged, but also the pulverized coal fuel is turned over during the alternating conveying of the pulverized coal fuel by the multi-stage conveyor belt 501, thereby improving the preheating effect of the pulverized coal fuel.

[0030] Working principle: When the pulverized coal fuel is transported to the combustion furnace, the pulverized coal fuel is first fed into the feed hopper 102 through the feeding hopper, and then stirred by the stirring rod 103 to reduce the probability of the pulverized coal fuel agglomerating. After stirring, the pulverized coal fuel will fall onto the conveyor belt 501 under the action of gravity.

[0031] In the process of the pulverized coal fuel falling from the feed hopper 102 to the conveyor belt 501, the hot air blower 203 is started to continuously blow hot air from the first multi-way pipe 201 to the management box 101, so that the pulverized coal fuel is preheated and heated under the continuous blowing of the hot air. In the process of the conveyor belt 501 conveying, the pulverized coal fuel is transported in multiple stages by using multiple staggered conveyor belts 501, which not only increases the residence time of the pulverized coal fuel in the management box 101 and prolongs the time it is blown by the hot air, but also increases the heat dissipation of the pulverized coal fuel in the multi-stage conveyor belt 501. During the alternating fuel conveying process, the pulverized coal fuel is turned over, thereby improving the preheating effect of the pulverized coal fuel. The preheated pulverized coal fuel will be conveyed to the aggregate bin by the conveying action of the conveyor belt 501, and finally sprayed into the combustion chamber of the combustion furnace through the pulverized coal spray gun for combustion. After entering the combustion furnace, the preheated pulverized coal fuel can quickly reach a stable combustion state, thereby helping to improve the combustibility of the pulverized coal fuel and reduce the loss of pulverized coal fuel during the combustion process, thereby further reducing the fuel expenditure cost of the power plant.

[0032] And in the process of preheating the pulverized coal fuel, when the hot air hits the side wall of the management box 101, it will flow from the second multi-way pipe 301 to the circulation pipe 302, and finally enter the interior of the management box 101 again under the suction of the hot air blower 203, thereby realizing the recycling of the hot air and reducing the waste of heat energy. At the same time, under the monitoring of the temperature detector 4, when the temperature in the management box 101 reaches the required temperature, the hot air blower 203 is stopped, thereby reducing the loss of electricity while ensuring the necessary temperature for preheating the pulverized coal fuel, thereby reducing the cost of preheating the pulverized coal fuel.

[0033] Example 2

[0034] Please refer to 3 and Figure 4 This embodiment further explains Example 1. The management box 101 shown in the figure is provided with an anti-pile assembly for preventing the accumulation of coal powder on each conveyor belt 501. The anti-pile assembly includes an anti-pile plate 601 slidably connected to the side of each conveyor belt 501 close to the coal powder conveying. Each anti-pile plate 601 is provided with a plurality of anti-pile rods 602 on the side close to the coal powder. The management box 101 is provided with a linkage assembly for synchronously moving each anti-pile plate 601.

[0035] It should be noted here that: through the setting of the anti-piling component and the use of the linkage component, each anti-piling rod 602 is driven to move back and forth on the surface of the conveyor belt 501, so as to utilize the reciprocating movement of the anti-piling rod 602 to flatten the pulverized coal fuel on the surface of the conveyor belt 501, thereby avoiding the pulverized coal fuel from piling up too thickly and causing a decrease in the heating effect.

[0036] See also Figure 3 and Figure 4 , the linkage assembly shown in the figure includes multiple groups of two symmetrically arranged guide rods 701 fixedly connected to the management box 101, and the side walls of the two adjacent guide rods 701 are slidably connected with guide plates 702, and the opposite sides of the two guide plates 702 are connected to the anti-stacking plate 601, and the side walls of the management box 101 are slidably connected with multiple linkage rods 703, one end of each linkage rod 703 is connected to the anti-stacking plate 601, and the other end of each linkage rod 703 is fixedly connected to a linkage plate 704, and a U-shaped plate 705 is fixedly connected to the side of the management box 101 close to the linkage plate 704, and the U-shaped plate 705 is arranged astride the linkage plate 704, and a push rod motor 706 is provided on the side away from the management box 101, and the output end of the push rod motor 706 is connected to the linkage plate 704;

[0037] It should be noted here that: through the setting of the linkage component, during the startup of the push rod motor 706, the linkage plate 704 will be driven to move back and forth. During the reciprocating movement of the linkage plate 704, under the driving force and the guiding action of the guide rod 701 and the guide plate 702, the anti-piling plate 601 will be driven to move back and forth, thereby further driving each anti-piling rod 602 to move back and forth on the surface of the conveyor belt 501, thereby utilizing the reciprocating movement of the anti-piling rod 602 to flatten the pulverized coal fuel on the surface of the conveyor belt 501, thereby avoiding the pulverized coal fuel from accumulating too thickly and causing a decrease in the heating effect.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A fuel management device for a power plant, comprising: A management box (101), wherein a feed hopper (102) is provided at the top of the management box (101), and a stirring rod (103) is provided in the feed hopper (102); It is characterized by further comprising: A management component provided in the management box (101) for controlling and managing the surface temperature of the pulverized coal fuel; The management component comprises a first multi-way pipe (201) arranged on one side of the management box (101); an air inlet pipe (202) is provided on a side of the first multi-way pipe (201) away from the management box (101); a hot air blower (203) is provided on one end of the air inlet pipe (202) away from the first multi-way pipe (201); and the management box (101) is provided with a circulation component for recycling hot air and a conveying component for multi-stage conveying of pulverized coal fuel.

2. A power plant fuel management device according to claim 1, characterized in that: The circulation component comprises a second multi-way pipe (301) fixedly connected to a side of the management box (101) away from the first multi-way pipe (201); a circulation pipe (302) is provided on one side of the second multi-way pipe (301); a connecting pipe (303) is provided at the air inlet end of the hot air blower (203); the other end of the circulation pipe (302) is connected to the connecting pipe (303); and a filter plate is provided at one end of the second multi-way pipe (301) communicating with the interior of the management box (101).

3. A power plant fuel management device according to claim 1, characterized in that: The inner wall of the management box (101) is provided with a temperature detector (4).

4. A power plant fuel management device according to claim 1, characterized in that: The conveying assembly includes a plurality of conveyor belts (501) arranged in a management box (101), and each of the conveyor belts (501) is staggered. Each of the conveyor belts (501) is arranged away from a feed hopper (102) and passes through the management box (101) and extends to the combustion furnace. A collecting hopper (502) is provided at the drop point of two adjacent conveyor belts (501), and the collecting hopper (502) is connected to the inner wall of the management box (101).

5. The power plant fuel management device according to claim 1, characterized in that: The management box (101) is provided with an anti-pile assembly for preventing coal powder from piling up on each conveyor belt (501), the anti-pile assembly comprising an anti-pile plate (601) slidably connected to the side of each conveyor belt (501) close to the coal powder conveying, a plurality of anti-pile rods (602) are provided on the side of each anti-pile plate (601) close to the coal powder, and the management box (101) is provided with a linkage assembly for synchronously moving each anti-pile plate (601).

6. A power plant fuel management device according to claim 5, characterized in that: The linkage assembly comprises a plurality of groups of two mutually symmetrically arranged guide rods (701) fixedly connected to the management box (101); the side walls of two adjacent guide rods (701) are slidably connected with guide plates (702); the opposite sides of the two guide plates (702) are connected to the anti-stacking plate (601); the side wall of the management box (101) is slidably connected with a plurality of linkage rods (703); one end of each linkage rod (703) is connected to the anti-stacking plate (601); the other end of each linkage rod (703) is fixedly connected to the linkage plate (704); a U-shaped plate (705) is fixedly connected to the side of the management box (101) close to the linkage plate (704); the U-shaped plate (705) is arranged to straddle the linkage plate (704); and a push rod motor (706) is provided on the side away from the management box (101); the output end of the push rod motor (706) is connected to the linkage plate (704).

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