Automatic unblocking device for pulverized coal conveying pipe of double-chamber kiln

Abstract

The utility model discloses an automatic unblocking device for a pulverized coal conveying pipe 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 pulverized coal hard pipe with a bent part and a spray gun, and an electric heating device is sleeved outside the bent part of the pulverized coal hard pipe. The input end of the pulverized coal hard pipe is connected with the output end of the air pocket, the output end of the pulverized coal hard pipe is connected with the flow meter, and the pulverized coal hard pipe is a pulverized coal metal pipe. Compared with the prior art, the air pocket is arranged on the pulverized coal hard pipe, and periodic injection is adopted, so that the inner wall of the pulverized coal pipe is cleaned, and blockage of the pulverized coal hard pipe is reduced; by arranging the electric heating device and the flow meter, the electric heating device can be started under the condition that the detected flow is zero, the moisture of pulverized coal in the pulverized coal hard pipe is effectively removed, meanwhile, under the action of the air bag, the pulverized coal pipe is smooth, and the electric heating device is arranged at the elbow part of the pulverized coal hard pipe, so that the moisture of the easily-blocked part is effectively removed.

Description

Technical Field

[0001] The utility model relates to the technical field of double-chamber kiln coal powder conveying equipment, in particular to an automatic blockage clearing device for a double-chamber kiln coal powder conveying pipe. 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 or not cleaned thoroughly, it is easy to cause product imbalance. Summary of the invention

[0004] The utility model provides an automatic clearing device for a double-chamber kiln coal powder conveying pipe, which can solve the problem that the elbow of the existing coal powder conveying pipe cannot be cleared in time after being blocked, resulting in unsmooth coal powder conveying in the pipe 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 with a bending portion and a spray gun, an electric heating device is installed outside the bending portion of the coal powder hard pipe, the input end of the coal powder hard pipe is connected to the output end of the air bag, and a flow meter is connected to the output end of the coal powder hard pipe, and the coal powder hard pipe is a coal powder metal pipe.

[0006] In the above technical solution, a more specific solution may be: an electric valve 2 is provided at the connection between the pulverized coal hose and the pulverized coal conveyor.

[0007] Further: an electric valve is provided at the input end of the coal powder hard pipe.

[0008] Further: the gas output end of the air bag is provided with an electric pneumatic valve.

[0009] Further: 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 installing an air bag on the pulverized coal hard pipe and adopting a periodic blowing setting, the inner wall of the pulverized coal pipe can be cleaned and the clogging of the pulverized coal hard pipe can be reduced; by setting an electric heating device and a flow meter, when the detected flow rate is 0, the electric heating device can be started to effectively remove the moisture of the pulverized coal in the pulverized coal hard pipe. At the same time, under the action of the air bag, the pulverized coal pipe can be unobstructed. The electric heating device is set at the elbow of the pulverized coal hard pipe to effectively remove the moisture in the easily blocked part.

[0013] 2. The modification of this device is relatively simple. By adding air bags and electric heating devices, regular cleaning of the pulverized coal pipeline can be achieved, which effectively ensures the smooth flow of the pulverized coal 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 5, spray gun 6, electric heating device 7, air bag 8, flow meter 9, electric valve two 10, electric valve one 11, electric pneumatic valve 12, furnace wall 13, flange 14. 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 automatic unclogging device for coal powder conveying pipe of double-chamber kiln shown in the figure comprises coal powder conveying fan 1, coal powder conveyor 2, coal powder distributor 3, coal powder hose 4, coal powder metal pipe 5 with bending part and spray gun 6, and electric heating device 7 is sleeved outside the bending part of each coal powder metal pipe, and the electric heating device 7 is wrapped outside the coal powder metal pipe. The electric heating device has its own temperature measuring device, which is used to keep the temperature of the bending part of the coal powder metal pipe 5 at about 100-150°C. The input end of the coal powder metal pipe is connected with the output end of the air bag 8, and the air bag 8 is used to spray compressed gas into the coal powder pipe; the output end of the coal powder hard pipe is connected with a flow meter. Table 9, flow meter 9 is connected to an alarm device, and the flow meter is used to detect changes in the coal powder flow rate. In this design, when it is found that the coal powder flow rate has no value, an alarm prompt will be issued to the main control room; an electric valve 2 10 is provided at the connection between the coal powder hose 4 and the coal powder conveyor, and an electric valve 11 is provided at the input end of the coal powder metal tube 5; an electric pneumatic valve 12 is provided at the gas output end of the air bag 8; a blowing time is set for the air bag, such as when the double-chamber kiln combustion time is set to stop, each coal powder metal tube is blown; a flange 14 for connecting to a spray gun is installed on the pipeline between the flow meter 9 and the furnace wall 13.

[0021] In normal production, the pulverized coal metal pipe 5 is used as the pulverized coal spray gun delivery pipeline, the electric valve 11 and the electric valve 2 10 are opened. In this design, the value detected by the flow meter 9 is low, close to 0m 3 / h, feedback is given to the system, and the system starts the electric heating device 19 to heat the pulverized coal iron pipe 13. When the temperature reaches 150°C, the heating stops automatically. Set the blowing time for the air bag. For example, when the combustion time of the double-chamber kiln is set to stop, each spray gun pipe is sprayed. When the combustion time of the double-chamber kiln combustion chamber is close to 0, close the electric valve 10, open the electric pneumatic valve 12, and spray the pulverized coal metal pipe instantly to ensure that the pulverized coal metal pipe is clean. The function of the electric heating device is to remove moisture from the pulverized coal. By matching the air bag, the air bag is more conducive to cleaning the pulverized coal that blocks the metal pipe. The air bag 8 is connected to the pulverized coal metal pipe 5, and the working pressure is about 5-7bar.

[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. An automatic unblocking device for a double-chamber kiln coal powder conveying pipe, 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: An electric heating device is sleeved outside the bending part of the pulverized coal hard pipe, the input end of the pulverized coal hard pipe is connected to the output end of the air bag, and a flow meter is connected to the output end of the pulverized coal hard pipe. The pulverized coal hard pipe is a pulverized coal metal pipe.

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

3. The automatic unblocking device for the coal powder conveying pipe of a double-chamber kiln according to claim 1 or 2, characterized in that: An electric valve 1 is arranged at the input end of the coal powder hard pipe.

4. The automatic unblocking device for the coal powder conveying pipe of a double-chamber kiln according to claim 3 is characterized in that: The gas output end of the air bag is provided with an electro-pneumatic valve.

5. The automatic unblocking device for the coal powder conveying pipe of the double-chamber kiln 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 automatic unblocking device for the coal powder conveying pipe of a double-chamber kiln according to claim 4 is characterized in that: The flow meter is connected to an alarm device.

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