Gas-coal dual combustion burner for double chamber lime kiln

Abstract

The utility model relates to double -barreled lime kiln technical field especially relates to a gas -coal dual -purpose burner for double -barreled lime kiln. Include: first spray gun, second spray gun, gas pipe and coal powder pipe, the first spray gun is worn into second spray gun inside and forms the concentric arrangement, the middle part of coal powder pipe and gas pipe is 90 degrees bending, and is equipped with protection assembly at the bending, coal powder pipe and gas pipe are connected with first spray gun and second spray gun respectively, and form annular channel between both, the utility model discloses a gas pipe and coal powder pipe suit formation annular channel, can form the conveying channel of inside powder outer gas, can choose fuel supply according to need, and the design of protection assembly, strengthens the protection ability of bending under the premise of guaranteeing the stable supply of material, effectively avoids the emergence of the leakage.

Description

Technical Field

[0001] This utility model relates to the field of double-chamber lime kiln technology, and in particular to a gas-coal combustor for double-chamber lime kilns. Background Technology

[0002] The lime kiln is the core equipment in the lime production process. Raw limestone is heated to 1100℃ in the kiln and calcined to produce lime. The double-chamber kiln is the most advanced vertical kiln equipment in lime production. In the double-chamber lime kiln production process, fuels such as pulverized coal or coal gas are evenly injected into the kiln chamber through burners (usually called spray guns) installed on the kiln shell to provide heat to the kiln chamber and ensure that the stone inside the kiln can be calcined to produce good finished lime. Traditional double-chamber kiln burners usually only supply one type of fuel to the kiln, either coal gas or pulverized coal. However, in actual production, depending on changes in fuel supply, it is often necessary to change the fuel or use both coal gas and pulverized coal simultaneously to calcine lime. Furthermore, there is a risk of erosion and leakage at the bends. Therefore, there is an urgent need for a combined gas-coal burner for double-chamber lime kilns. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gas-coal combustor for a double-chamber lime kiln, which addresses the above-mentioned technical deficiencies. The combustor forms an annular channel through the gas pipe and the pulverized coal pipe, which can form a conveying channel for internal pulverized coal and external gas. It can select the fuel supply as needed, and the design of the protective components strengthens the protection capability at the bends while ensuring stable material supply, effectively avoiding leakage.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a gas-coal combustor for a double-chamber lime kiln, comprising: a first spray gun, a second spray gun, a gas pipe, and a pulverized coal pipe; the first spray gun penetrates into the interior of the second spray gun and forms a concentric arrangement; the pulverized coal pipe and the gas pipe are bent at 90 degrees in the middle, and a protective component is provided at the bend; the pulverized coal pipe and the gas pipe are respectively connected to the first spray gun and the second spray gun, and an annular channel is formed between them.

[0005] Preferably, the protective component includes an elbow connector and an elbow protector; the two ends of the elbow connector are respectively connected to the horizontal section and the vertical section inside the gas pipe, and the interior is in communication with the annular channel; the elbow protector is installed on the outside of the bend of the pulverized coal pipe and is fixedly connected to the elbow connector.

[0006] Preferably, a positioning component is provided below the vertical section of the annular channel.

[0007] Preferably, the left end of the first spray gun is provided with a first inlet and a second inlet.

[0008] Preferably, an inspection port is provided at the lower left end of the first spray gun.

[0009] Preferably, the second spray gun is provided with a third inlet and a fourth inlet.

[0010] Preferably, the horizontal section of the second spray gun is provided with a fixing component that connects to the spray gun protection box.

[0011] Compared with the prior art, the present invention has the following advantages: 1. The first spray gun delivers pulverized coal into the double-chamber lime kiln through the pulverized coal pipe, while the annular channel formed between the second spray gun and the first spray gun can deliver coal gas into the double-chamber lime kiln, which greatly enhances the applicability of fuel in production and ensures the production efficiency of lime. 2. The design of the protective components enables the connection between the gas supply section at the bend and the annular channel. The traditional circular bend is replaced with a square 90° bend design, and the ends of the horizontal and vertical sections are equipped with blocking plates that allow only the pulverized coal pipe to pass through, forming an integrated structure. Together with the bend protection component and the bend connector, a protective space is formed, which can effectively prevent leakage after the pulverized coal pipe is washed away and damaged by pulverized coal. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a gas-coal combustor for a double-chamber lime kiln. Figure 2 This is a schematic diagram of the structure at point AA; Figure 3 This is a schematic diagram showing the connection between the pulverized coal pipe and the first spray gun. Figure 4 This is a schematic diagram showing the connection between the gas pipe and the second spray gun.

[0013] In the diagram: 1. First spray gun; 2. Second spray gun; 3. Gas pipe; 4. Pulverized coal pipe; 5. Protective assembly; 6. Circular channel; 7. Fixing assembly; 101. First inlet; 102. Second inlet; 103. Inspection port; 201. Third inlet; 202. Fourth inlet; 501. Elbow connector; 502. Elbow protection component; 601. Positioning assembly. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0015] Specific implementation method one: Combining Figure 1-4 As shown, a gas-coal combustor for a double-chamber lime kiln includes: a first spray gun 1, a second spray gun 2, a gas pipe 3, and a pulverized coal pipe 4; the first spray gun 1 penetrates into the interior of the second spray gun 2 and forms a concentric arrangement; the middle of the pulverized coal pipe 4 and the gas pipe 3 are both bent at 90 degrees, and a protective component 5 is provided at the bend; the pulverized coal pipe 4 and the gas pipe 3 are respectively connected to the first spray gun 1 and the second spray gun 2, and an annular channel 6 is formed between them.

[0016] Preferred embodiments, in combination Figure 1 , Figure 3 and Figure 4 As shown, the protective component 5 includes an elbow connector 501 and an elbow protector 502. The elbow connector is a square 90° elbow with end plates at the ends of the horizontal and vertical sections that allow the pulverized coal pipe 4 to pass through. The two ends of the elbow connector 501 are connected to the horizontal and vertical sections inside the gas pipe 3, respectively, and are in communication with the annular channel 6. The elbow protector 502 is installed on the outside of the bend of the pulverized coal pipe 4 and is fixedly connected to the elbow connector 501 to form a separate protective space to prevent leakage after the pulverized coal pipe 4 is damaged by pulverized coal, thus enhancing safety.

[0017] Preferred embodiments, in combination Figure 1 and Figure 2 As shown, a positioning component 601 is provided below the vertical section of the annular channel 6. The positioning component 601 consists of multiple ribs arranged at an angle, preferably three. By connecting with the gas pipe 3 and the pulverized coal pipe 4, it can keep the two concentric and fixed, and has a stabilizing effect on the gas passing through the vertical section.

[0018] Preferred embodiments, in combination Figure 1 and Figure 3 As shown, the left end of the first spray gun 1 is provided with a first inlet 101 and a second inlet 102. The first inlet 101 is the cooling air inlet of the pulverized coal pipe 4, while the second inlet 102 is the pulverized coal inlet. The two are staggered to avoid interference.

[0019] Preferred embodiments, in combination Figure 1 As shown, an inspection port 103 is provided at the lower left end of the first spray gun 1 to facilitate subsequent maintenance operations.

[0020] Preferred embodiments, in combination Figure 1 and Figure 4 As shown, the second spray gun 2 is provided with a third inlet 201 and a fourth inlet 202. The third inlet 201 is the cooling air inlet of the gas pipe 3, and the fourth inlet 202 is the gas inlet. The two are also arranged in a staggered manner to avoid interference.

[0021] Preferred embodiments, in combination Figure 1 and Figure 4 As shown, the horizontal section of the second spray gun 2 is equipped with a fixing component 7 that connects to the spray gun protection box. The fixing component adopts a structural design with flanges at both ends and a steel pipe in the middle to achieve the connection with the spray gun protection box.

[0022] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A gas-coal combustor for a double-chamber lime kiln, characterized in that, include: The system consists of a first spray gun (1), a second spray gun (2), a gas pipe (3), and a pulverized coal pipe (4). The first spray gun (1) is inserted into the second spray gun (2) and arranged concentrically. The pulverized coal pipe (4) and the gas pipe (3) are bent at a (90) degree in the middle and a protective component (5) is provided at the bend. The pulverized coal pipe (4) and the gas pipe (3) are respectively connected to the first spray gun (1) and the second spray gun (2), and an annular channel (6) is formed between them.

2. A gas-coal combustor for a double-chamber lime kiln according to claim 1, characterized in that: The protective component (5) includes an elbow connector (501) and an elbow protector (502); the two ends of the elbow connector (501) are respectively connected to the horizontal section and the vertical section inside the gas pipe (3), and the inside is in communication with the annular channel (6); the elbow protector (502) is installed on the outside of the bend of the pulverized coal pipe (4) and is fixedly connected to the elbow connector (501).

3. A gas-coal combustor for a double-chamber lime kiln according to claim 1, characterized in that: A positioning component (601) is provided below the vertical section of the annular channel (6).

4. A gas-coal combustor for a double-chamber lime kiln according to claim 1, characterized in that: The left end of the first spray gun (1) is provided with a first inlet (101) and a second inlet (102).

5. A gas-coal combustor for a double-chamber lime kiln according to claim 1, characterized in that: The first spray gun (1) has an inspection port (103) located at the lower left end.

6. A gas-coal combustor for a double-chamber lime kiln according to claim 1, characterized in that: The second spray gun (2) is provided with a third inlet (201) and a fourth inlet (202).

7. A gas-coal combustor for a double-chamber lime kiln according to claim 1, characterized in that: The horizontal section of the second spray gun (2) is provided with a fixing component (7) that is connected to the spray gun protection box.

Images