Coal saving device for boiler

Abstract

The utility model discloses a boiler coal saving device which comprises a boiler body and further comprises a feeding pipe arranged on one side of the boiler body, one side of the feeding pipe is connected with a hopper through a connecting pipe, one end of a conical material collecting bin is connected with the feeding pipe, the other end of the conical material collecting bin is provided with a pulverized coal spray gun, and the pulverized coal spray gun is connected with the feeding pipe. The feeding pipe is provided with a preheating assembly used for preheating pulverized coal and a conveying assembly used for conveying the pulverized coal. By arranging the preheating assembly and utilizing the temperature of high-temperature waste gas, pulverized coal is preheated before injection, so that the flammability of the pulverized coal is improved, the loss of the pulverized coal in the combustion process is reduced, the energy consumption is reduced, the high-temperature waste gas generated by combustion of the boiler body exchanges heat with the pulverized coal to be combusted through heat exchange, and the combustion efficiency is improved. And waste gas is effectively utilized for heat exchange, so that the utilization efficiency of the high-temperature waste gas is improved while the emission treatment of the high-temperature waste gas is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a boiler coal-saving device. Background Art

[0002] A boiler is an energy converter. It is a device that uses the heat energy released by fuel combustion or other heat energy to heat the working medium water or other fluids to certain parameters. The boiler is divided into two parts: the "pot" and the "furnace". The "pot" is a pressurized component that holds water and steam, and heats, vaporizes and separates the water. The "furnace" is a place where fuel combustion or other heat energy is released, and it has combustion equipment, a combustion chamber, a furnace, and a heat-releasing flue.

[0003] When the boiler burns pulverized coal, its surface temperature is relatively low due to safety considerations during storage. When the pulverized coal is transported from the storage chamber to the furnace body for combustion, the low-temperature pulverized coal not only causes a relatively slow combustion speed, but also reduces its completeness of combustion, thereby affecting the loss of pulverized coal during the combustion process and increasing the energy consumption expenditure of boiler combustion.

[0004] Therefore, a boiler coal-saving device is urgently needed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a boiler coal-saving device to solve the problem of failure to preheat the pulverized coal proposed in the above-mentioned background technology.

[0006] The utility model solves the technical problem by providing a boiler coal-saving device, comprising a boiler body, a smoke outlet pipe being arranged on one side of the boiler body, a water inlet pipe being spirally arranged in the boiler body and a metal filter plate being arranged on the side of the water inlet pipe close to the combustion chamber, and also comprising a feed pipe arranged on one side of the boiler body, one side of the feed pipe being connected to a hopper through a connecting pipe, a control valve being arranged on the side wall of the connecting pipe, a conical aggregate bin being fixedly connected to one side of the boiler body close to the feed pipe, one end of the conical aggregate bin being connected to the feed pipe, a coal powder spray gun being arranged on the other end of the conical aggregate bin, a preheating assembly for preheating coal powder and a conveying assembly for conveying coal powder being arranged on the feed pipe;

[0007] The preheating assembly comprises a preheating tube spirally wound on the side wall of the feed pipe, and one end of the preheating tube is connected to the smoke outlet pipe.

[0008] A conical collecting cover is arranged in the smoke outlet pipe, the conical large end of the conical collecting cover is arranged close to the boiler body, and the other end of the preheating tube is connected to the conical small end of the conical collecting cover.

[0009] The conveying assembly includes two rotating rollers rotatably connected to a feed pipe, the two rotating rollers are connected via a conveyor belt, a rotating motor is provided on the outer wall of the feed pipe, and an output end of the rotating motor is connected to one of the two rotating rollers.

[0010] The feed pipe is provided with a processing assembly for processing the coal powder accumulated on the conveyor belt. The processing assembly includes a plurality of sliding plates slidably connected to the feed pipe. A side of each sliding plate close to the conveyor belt is connected to a plurality of processing rods through a T-shaped plate. The feed pipe is provided with a driving assembly for driving each processing rod.

[0011] Adjacent sliding plates are connected via fixing plates.

[0012] The driving assembly includes two symmetrically arranged T-shaped rods fixedly connected to the inner wall of the feed pipe, each sliding plate is slidably connected to the T-shaped rod, and a push rod motor is provided at one end of the feed pipe away from the boiler body, and the output end of the push rod motor is connected to the sliding plate.

[0013] Compared with the prior art, the beneficial effect of the utility model is that: the utility model preheats the coal powder before injection by utilizing the temperature of the high-temperature exhaust gas through the setting of the preheating component, thereby improving the combustibility of the coal powder, reducing the loss of coal powder during the combustion process, and reducing energy consumption. The high-temperature exhaust gas generated by the combustion of the boiler body is exchanged with the coal powder to be burned through heat exchange, and the exhaust gas heat is effectively used, thereby ensuring the emission treatment of the high-temperature exhaust gas while improving the utilization efficiency of the high-temperature exhaust gas. 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 internal structure of the boiler body of the utility model;

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

[0017] In the figure: 101, boiler body; 102, smoke outlet pipe; 103, water inlet pipe; 104, metal filter plate; 2, feed pipe; 3, connecting pipe; 4, hopper; 5, control valve; 6, conical collecting bin; 7, pulverized coal spray gun; 8, preheating pipe; 9, conical collecting cover; 1001, rotating roller; 1002, conveyor belt; 1003, rotating motor; 1101, sliding plate; 1102, T-plate; 1103, processing rod; 1104, fixed plate; 1201, T-rod; 1202, push rod motor. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are given below. The specific embodiments are only used to further illustrate the present invention in detail and do not limit the protection scope of the present invention.

[0019] Example 1

[0020] See also Figure 1-Figure 3 A boiler coal-saving device shown in the figure comprises a boiler body 101, a smoke outlet pipe 102 is arranged on one side of the boiler body 101, a water inlet pipe 103 is spirally arranged in the boiler body 101, and a metal filter plate 104 is arranged on the side of the water inlet pipe 103 close to the combustion chamber, and also comprises a feed pipe 2 arranged on one side of the boiler body 101, one side of the feed pipe 2 is connected to a hopper 4 through a connecting pipe 3, a control valve 5 is arranged on the side wall of the connecting pipe 3, a conical aggregate bin 6 is fixedly connected to the side of the boiler body 101 close to the feed pipe 2, one end of the conical aggregate bin 6 is connected to the feed pipe 2, and a coal powder spray gun 7 is arranged on the other end of the conical aggregate bin 6, and a preheating component for preheating coal powder and a conveying component for conveying coal powder are arranged on the feed pipe 2;

[0021] The preheating assembly includes a preheating tube 8 spirally wound on the side wall of the feed tube 2, and one end of the preheating tube 8 is connected to the smoke outlet pipe 102;

[0022] It should be noted here that: by setting up the preheating component and utilizing the temperature of the high-temperature exhaust gas, the pulverized coal is preheated before injection, thereby improving the combustibility of the pulverized coal, reducing the loss of pulverized coal during the combustion process, and reducing energy consumption. The high-temperature exhaust gas generated by the combustion of the boiler body 101 is exchanged with the pulverized coal to be burned through heat exchange, and the exhaust gas is effectively utilized for heat exchange, thereby ensuring the emission treatment of the high-temperature exhaust gas while improving the utilization efficiency of the high-temperature exhaust gas.

[0023] It is worth noting that the use of the pulverized coal spray gun 7 helps to ensure that the pulverized coal can be evenly distributed and fully burned. As a prior art, its specific structure and working principle have been mastered by those skilled in the art, and will not be elaborated here.

[0024] See also Figure 2 In the smoke outlet pipe 102 shown in the figure, a conical collecting cover 9 is provided in the smoke outlet pipe 102, the conical large end of the conical collecting cover 9 is arranged close to the boiler body 101, and the other end of the preheating tube 8 is connected to the conical small end of the conical collecting cover 9;

[0025] It should be noted here that the provision of the conical collecting cover 9 facilitates the guidance of high-temperature exhaust gas into the preheating tube 8 .

[0026] See also Figure 2 and Figure 3The conveying assembly shown in the figure includes two rotating rollers 1001 rotatably connected to the feeding pipe 2, the two rotating rollers 1001 are connected by a conveyor belt 1002, the outer wall of the feeding pipe 2 is provided with a rotating motor 1003, and the output end of the rotating motor 1003 is connected to one of the two rotating rollers 1001;

[0027] It should be noted here that the provision of the conveying assembly facilitates the conveying of the pulverized coal falling from the hopper 4 .

[0028] It is worth noting that the conveyor belt 1002 is made of high temperature resistant material.

[0029] Working principle: When the boiler body 101 is fed with pulverized coal for combustion so as to continuously release heat energy to heat the liquid in the water inlet pipe 103, firstly, the amount and speed of the pulverized coal falling from the hopper 4 are controlled by the control function of the control valve 5. When the pulverized coal falls from the hopper 4 to the conveyor belt 1002, the pulverized coal will be transported to the conical aggregate bin 6 under the conveying function of the conveyor belt 1002, and finally sprayed into the combustion chamber of the boiler body 101 through the pulverized coal spray gun 7 for combustion, thereby continuously releasing heat energy and realizing continuous heating of the liquid in the water inlet pipe 103.

[0030] At the same time, in the process of conveying pulverized coal by the conveyor belt 1002, the high-temperature exhaust gas generated by the combustion of the boiler body 101 is guided into the preheating pipe 8 by the conical collecting cover 9, and because the preheating pipe 8 is spirally wound on the side wall of the feed pipe 2, the feed pipe 2 is heated by the high-temperature exhaust gas, and the pulverized coal flowing in the feed pipe 2 is further preheated, and the high-temperature exhaust gas used for preheating will flow back to the smoke outlet pipe 102 again, thereby ensuring the discharge treatment of the high-temperature exhaust gas while realizing the secondary utilization of the high-temperature exhaust gas, so that the pulverized coal is preheated before injection, thereby improving the combustibility of the pulverized coal, reducing the loss of pulverized coal during the combustion process, and reducing energy consumption. The high-temperature exhaust gas generated by the combustion of the boiler body 101 is exchanged with the pulverized coal to be burned through heat exchange, effectively utilizing the exhaust gas for heat exchange, and improving the utilization efficiency of the high-temperature exhaust gas.

[0031] Example 2

[0032] See also Figure 3 , this embodiment further explains Example 1, the feed pipe 2 shown in the figure is provided with a processing assembly for processing the coal powder accumulated on the conveyor belt 1002, the processing assembly includes a plurality of sliding plates 1101 slidably connected to the feed pipe 2, and a plurality of processing rods 1103 are connected to each sliding plate 1101 on a side close to the conveyor belt 1002 through a T-shaped plate 1102, and a driving assembly for driving each processing rod 1103 is provided on the feed pipe 2;

[0033] It should be noted here that: through the setting of the processing component, under the action of the driving component, each processing rod 1103 is driven to move back and forth on the conveyor belt 1002, so that the coal powder accumulated on the conveyor belt 1002 is moved and flattened, thereby improving the uniformity and preheating effect of the coal powder.

[0034] It is worth noting that the processing rods 1103 on two adjacent T-shaped plates 1102 are staggered, thereby improving the flattening processing effect on the coal powder.

[0035] See also Figure 2 and Figure 3 , the adjacent sliding plates 1101 shown in the figure are connected by a fixing plate 1104;

[0036] It should be noted here that: by disposing the fixed plate 1104 , it is convenient to connect the sliding plates 1101 , so as to facilitate the synchronous movement of the sliding plates 1101 .

[0037] See also Figure 2 and Figure 3 The driving assembly shown in the figure includes two T-shaped rods 1201 fixedly connected to the inner wall of the feed pipe 2 and arranged symmetrically with each other, each sliding plate 1101 is slidably connected to the T-shaped rod 1201, and a push rod motor 1202 is provided at one end of the feed pipe 2 away from the boiler body 101, and the output end of the push rod motor 1202 is connected to the sliding plate 1101;

[0038] It should be noted here that: through the setting of the driving component, the driving action of the push rod motor 1202 and the guiding action of the two T-shaped rods 1201 will be used to push each sliding plate 1101 to move back and forth, thereby further pushing each processing rod 1103 to move back and forth.

[0039] Anything not described in the present invention is applicable to the prior art.

Claims

1. A boiler coal-saving device, comprising: A boiler body (101), wherein a smoke outlet pipe (102) is provided on one side of the boiler body (101), and a water inlet pipe (103) and a metal filter plate (104) are spirally provided inside the boiler body (101) and arranged on a side of the water inlet pipe (103) close to the combustion chamber; It is characterized by further comprising: A feed pipe (2) is arranged on one side of the boiler body (101), one side of the feed pipe (2) is connected to a hopper (4) via a connecting pipe (3), a control valve (5) is provided on the side wall of the connecting pipe (3), a conical material collection bin (6) is fixedly connected to one side of the boiler body (101) close to the feed pipe (2), one end of the conical material collection bin (6) is connected to the feed pipe (2), a coal powder spray gun (7) is provided at the other end of the conical material collection bin (6), and a preheating component for preheating coal powder and a conveying component for conveying coal powder are provided on the feed pipe (2); The preheating assembly comprises a preheating tube (8) spirally wound on the side wall of the feed tube (2), and one end of the preheating tube (8) is connected to the smoke outlet pipe (102).

2. A boiler coal saving device according to claim 1, characterized in that: A conical collecting cover (9) is arranged inside the smoke outlet pipe (102), the conical large end of the conical collecting cover (9) is arranged close to the boiler body (101), and the other end of the preheating tube (8) is connected to the conical small end of the conical collecting cover (9).

3. A boiler coal saving device according to claim 1, characterized in that: The conveying assembly comprises two rotating rollers (1001) rotatably connected to a feed pipe (2); the two rotating rollers (1001) are connected via a conveyor belt (1002); a rotating motor (1003) is provided on the outer side wall of the feed pipe (2); an output end of the rotating motor (1003) is connected to one of the two rotating rollers (1001).

4. A boiler coal saving device according to claim 3, characterized in that: The feed pipe (2) is provided with a processing assembly for processing the coal powder accumulated on the conveyor belt (1002), and the processing assembly includes a plurality of sliding plates (1101) slidably connected to the feed pipe (2), and a side of each sliding plate (1101) close to the conveyor belt (1002) is connected to a plurality of processing rods (1103) via a T-shaped plate (1102), and the feed pipe (2) is provided with a driving assembly for driving each processing rod (1103).

5. A boiler coal saving device according to claim 4, characterized in that: Adjacent sliding plates (1101) are connected via a fixing plate (1104).

6. A boiler coal saving device according to claim 4, characterized in that: The driving assembly comprises two T-shaped rods (1201) fixedly connected to the inner wall of the feed pipe (2) and symmetrically arranged with each other, each of the sliding plates (1101) being slidably connected to the T-shaped rods (1201), and a push rod motor (1202) is provided at one end of the feed pipe (2) away from the boiler body (101), and the output end of the push rod motor (1202) is connected to the sliding plate (1101).

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