Pulverized coal conveying pipe device of double-chamber kiln

Abstract

The utility model discloses a pulverized coal conveying pipe device of a double-chamber kiln, which relates to the field of pulverized coal conveying equipment of the double-chamber kiln and comprises a pulverized coal conveying fan, a pulverized coal conveyor, a pulverized coal distributor, a pulverized coal hose, a first pulverized coal hard pipe with a bent part and a spray gun. The output end of the second pulverized coal hard pipe is connected behind the bent portion of the first pulverized coal hard pipe, the input end of the second pulverized coal hard pipe is connected in front of the bent portion of the first pulverized coal hard pipe, the main pulverized coal input end of the first pulverized coal hard pipe and the main pulverized coal output end of the second pulverized coal hard pipe are connected with an air bag, and the main pulverized coal output end of the first pulverized coal hard pipe and the main pulverized coal output end of the second pulverized coal hard pipe are connected with flow meters. Compared with the prior art, periodic injection is adopted, cleaning of the inner wall of the pulverized coal hard pipe is achieved, and blockage of the pulverized coal hard pipe is reduced; by arranging the second pulverized coal hard pipe and the flow meter, the second bypass pulverized coal hard pipe can be started under the condition that the detected flow is zero, normal production is effectively guaranteed, and smoothness of the pulverized coal hard pipe is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of double-chamber kiln coal powder conveying equipment, in particular to a double-chamber kiln coal powder conveying pipe device. Background Art

[0002] The double-chamber kiln coal powder conveying system is the calcining equipment of the double-chamber kiln. Figure 1 As shown, the coal powder conveying pipe device is composed of a Roots blower 101, a coal powder conveyor 102, a coal powder distributor 103, a coal powder hose 104, a coal powder hard pipe 105, a spray gun 106, etc. Each kiln chamber of the double-chamber kiln has 33 spray guns, which are used for coal powder conveying and calcining, and are important equipment for the double-chamber kiln. During normal production, the Roots blower sends compressed gas into the coal powder conveying system, and the coal powder conveyor sends coal powder into the coal powder pipeline. Driven by the compressed gas, after the coal powder enters the coal powder pipeline, it is sent into the combustion chamber spray gun by the compressed gas through the coal powder distributor, the coal powder hose, the coal powder hard pipe, and the spray gun, and mixed with the combustion-supporting air at the spray gun head for combustion. The coal powder hard pipe is connected to the spray gun through a flange.

[0003] During coal making, due to improper operation, the coal powder itself carries a lot of water, resulting in the coal powder moisture content exceeding 3.5%. In this case, the coal powder is easy to adhere to the inner wall of the coal powder hard pipe elbow, causing the coal powder pipe to be blocked, and the coal powder cannot pass through the spray gun smoothly into the kiln, resulting in the blocked spray gun in the kiln unable to calcine. Daily inspections require manual touch and feel of the elbow. After the blockage is found, the pipe is knocked to clear the blockage to ensure the smoothness of the pipe and to ensure that the coal powder is fully distributed and burned. If the cleaning is not timely and thorough, it is easy to cause product imbalance. Summary of the invention

[0004] The utility model provides a double-chamber kiln coal powder conveying pipe device, which can solve the problem that the elbow of the existing coal powder conveying pipeline cannot be cleaned in time after being blocked, resulting in unsmooth coal powder conveying in the pipeline and insufficient distribution and combustion of the coal powder.

[0005] In order to solve the above problems, the technical solution of the utility model is: the device includes a coal powder conveying fan, a coal powder conveyor, a coal powder distributor, a coal powder hose, a coal powder hard pipe 1 with a bending portion and a spray gun, a coal powder hard pipe 2 is connected in parallel to the side of the coal powder hard pipe 1, the output end of the coal powder hard pipe 2 is connected after the bending portion of the coal powder hard pipe 1, the input end of the coal powder hard pipe 2 is connected before the bending portion of the coal powder hard pipe 1, an air bag is connected to the total coal powder input end of the coal powder hard pipe 1 and the coal powder hard pipe 2, and a flow meter is connected to the total coal powder output end of the coal powder hard pipe 1 and the coal powder hard pipe 2.

[0006] In the above technical solution, a more specific solution may be: an electric valve five is provided at the connection between the pulverized coal hose and the pulverized coal conveyor.

[0007] Furthermore: the input end and output end of the pulverized coal rigid tube 1 are respectively provided with electric valve 1 and electric valve 2; the input end and output end of the pulverized coal rigid tube 2 are respectively provided with electric valve 3 and electric valve 4.

[0008] Further: the gas outlet of the air bag is equipped with an electric pneumatic valve.

[0009] Furthermore: a flange for connecting to the spray gun is installed on the pipeline between the flow meter and the furnace wall.

[0010] Further: the flow meter is connected to an alarm device.

[0011] Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0012] 1. By connecting the second pulverized coal hard pipe in parallel to the side of the first pulverized coal hard pipe, and installing an air bag on the total input end of the pulverized coal hard pipe, a periodic blowing setting is adopted to clean the inner wall of the pulverized coal hard pipe and reduce the blockage of the pulverized coal hard pipe; by setting the second pulverized coal hard pipe and the flow meter, it is possible to start the bypass of the second pulverized coal hard pipe when the detected flow rate is 0, effectively ensuring normal production and achieving unobstructed pulverized coal hard pipe.

[0013] 2. The modification of this device is relatively simple. By adding a bypass coal powder hard pipe, an electric pneumatic valve, and an air bag device, the coal powder pipeline can be cleaned regularly, which effectively ensures the smooth flow of the coal powder pipeline and meets the needs of process production. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the prior art structure.

[0015] Figure 2 It is a schematic diagram of the structure of the utility model.

[0016] Serial number description:

[0017] Coal powder conveying fan 1, coal powder conveyor 2, coal powder distributor 3, coal powder hose 4, coal powder hard pipe 1 5, spray gun 6, coal powder hard pipe 2 7, air bag 8, flow meter 9, electric valve 5 10, electric valve 1 11, electric valve 2 12, electric valve 3 13, electric valve 4 14, electric pneumatic valve 15, furnace wall 16, flange 17. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purposes, features and advantages of the utility model easier to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. In the following description, many specific details are set forth in order to fully understand the utility model, but the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0019] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figure 2 The double-chamber kiln coal powder conveying pipe device shown in the figure includes a coal powder conveying fan 1, a coal powder conveyor 2, a coal powder distributor 3, a coal powder hose 4, a coal powder hard pipe 1 5 with a bending portion and a spray gun 6 according to the conveying direction of the coal powder. A coal powder hard pipe 2 7 is connected in parallel beside the coal powder hard pipe 1 5. The output end of the coal powder hard pipe 2 is connected after the bending portion of the coal powder hard pipe 1 5, and the input end of the coal powder hard pipe 2 is connected before the bending portion of the coal powder hard pipe 1 5. An air bag 8 is connected to the total coal powder input end of the coal powder hard pipe 1 5 and the coal powder hard pipe 2 7. A flow meter 9 is connected to the total coal powder output end of the coal powder hard pipe 1 5 and the coal powder hard pipe 2 7. The flow meter 9 is installed at the total coal powder output On the horizontal section at the end, the flow meter 9 is connected to an alarm device for detecting changes in the coal powder flow rate. In the present design, when the flow meter detects that the coal powder flow rate value is 0, an alarm prompt will be issued to the main control room; an electric valve five 10 is provided at the connection between the coal powder hose 4 and the coal powder conveyor 2, and an electric valve one 11 and an electric valve two 12 are provided at the input and output ends of the coal powder hard pipe 5 respectively; an electric valve three 13 and an electric valve four 14 are provided at the input and output ends of the coal powder hard pipe 2 7 respectively, the gas outlet of the air bag 8 is equipped with an electric pneumatic valve 15, and a flange 17 for connecting with the spray gun 6 is provided on the pipeline between the flow meter 9 and the furnace wall 16.

[0021] In normal production, the coal powder hard pipe 15 is used as the coal powder spray gun conveying pipeline, that is, the electric valve 11 and the electric valve 2 12 are opened, and the coal powder hard pipe 2 7 is reserved, that is, the electric valve 3 13 and the electric valve 4 14 are closed; in this design scheme, the value detected by the flow meter 9 is low, close to 0m 3 / h, feedback is given to the system, and the system automatically closes the electric valve 11 and the electric valve 2 12, and opens the electric valve 3 13 and the electric valve 4 14, that is, the coal powder hard pipe 2 7 is used to transport the coal powder; the blowing time is set for the air bag 8, such as when the combustion time of the double-chamber kiln is set to stop, the coal powder hard pipe is blown; when the combustion time of the double-chamber kiln combustion chamber is close to 0, the electric valve 5 10 is closed, and the electric pneumatic valve 15 is opened, and the coal powder hard pipe 1 5 or the coal powder hard pipe 2 7 is instantly blown to ensure that the coal powder hard pipe is clean; the air bag 8 is connected to the coal powder hard pipe, and the working pressure is about 5-7bar; in other design schemes, the flow rate displayed on the flow meter can also be manually observed. When the flow meter shows that the coal powder flow value is close to 0, the electric valve 11 and the electric valve 2 12 are manually closed, and the electric valve 3 13 and the electric valve 4 14 are opened, that is, the coal powder hard pipe 2 7 is used to transport the coal powder.

[0022] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical scheme and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-chamber kiln coal powder conveying pipe device, comprising a coal powder conveying fan, a coal powder conveyor, a coal powder distributor, a coal powder hose, a coal powder hard pipe with a bending portion, and a spray gun, characterized in that: A coal powder hard tube 2 is connected in parallel to the side of the coal powder hard tube 1, the output end of the coal powder hard tube 2 is connected after the bending part of the coal powder hard tube 1, the input end of the coal powder hard tube 2 is connected before the bending part of the coal powder hard tube 1, an air bag is connected to the total coal powder input end of the coal powder hard tube 1 and the coal powder hard tube 2, and a flow meter is connected to the total coal powder output end of the coal powder hard tube 1 and the coal powder hard tube 2.

2. The double-chamber kiln coal powder conveying pipe device according to claim 1 is characterized in that: An electric valve five is arranged at the connection between the pulverized coal hose and the pulverized coal conveyor.

3. The double-chamber kiln coal powder conveying pipe device according to claim 1 or 2, characterized in that: The input end and output end of the pulverized coal rigid pipe 1 are respectively provided with an electric valve 1 and an electric valve 2; the input end and output end of the pulverized coal rigid pipe 2 are respectively provided with an electric valve 3 and an electric valve 4.

4. The double-chamber kiln coal powder conveying pipe device according to claim 3 is characterized in that: The gas outlet of the air bag is equipped with an electric pneumatic valve.

5. The double-chamber kiln coal powder conveying pipe device according to claim 4 is characterized in that: A flange for connecting with the spray gun is arranged on the pipeline between the flow meter and the furnace wall.

6. The double-chamber kiln coal powder conveying pipe device according to claim 4, characterized in that: The flow meter is connected to an alarm device.

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