Pulverized coal distributor

Abstract

The utility model relates to the technical field of distributors, in particular to a pulverized coal distributor which comprises an air inlet pipe, air conveying cylinders are arranged on the left side and the right side of the upper portion of the air inlet pipe, a plurality of branch pipes which are annularly distributed at equal intervals are communicated with the edges of the upper portions of the air conveying cylinders, and opening and closing assemblies are arranged between the branch pipes and the air inlet pipe. The opening and closing assembly comprises a flow sensor, a first electromagnetic valve, a second electromagnetic valve, a PLC and a buzzer alarm and is used for controlling opening and closing of the gas conveying cylinder, the gas inlet pipe is in a Y shape, the lower portion of the gas conveying cylinder communicates with two lower pipes, the two lower pipes communicate with the left side and the right side of the upper end of the gas inlet pipe through bolts correspondingly, and an access hole is formed in the upper end of the gas conveying cylinder. A maintenance cover used for shielding the maintenance opening is connected to the upper portion of the gas conveying cylinder through bolts, a reinforcing ring is connected between the outer portion of the branch pipe and the gas conveying cylinder, and a reinforcing plate is connected between the lower pipe and the gas conveying cylinder. According to the utility model, the situation that coal ash transportation needs to be suspended for maintenance when the gas transmission cylinder or the branch pipe leaks is avoided, and continuous supply of coal ash is well ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of distributors, and discloses a pulverized coal distributor. Background Art

[0002] A pulverized coal distributor is a device used to distribute pulverized coal. The pulverized coal is used for a boiler burner. The pulverized coal distributor includes an air inlet pipe, a distribution cylinder, and a plurality of branch pipes. The air inlet pipe is connected to the lower end of the distribution cylinder, and there are several branch pipes connected to the upper end of the distribution cylinder. The distribution of the branch pipes is usually evenly distributed at equal intervals. The pulverized coal distributor is installed in a direct-fired coal pulverizing system. Under the action of high-pressure wind, the pulverized coal enters the interior of the distribution cylinder through the air inlet pipe. The air and pulverized coal entering the interior of the distribution cylinder are evenly distributed into several branch pipes. The diameter of the air inlet pipe is larger than that of the branch pipes, so as to ensure the smoothness of the pulverized coal entering the interior of the distribution cylinder through the air inlet pipe. The several branch pipes communicate with the boiler burner. When the pulverized coal enters the interior of the boiler burner, it can burn, providing fuel for the boiler burner. The several branch pipes are also evenly distributed at equal intervals on the boiler burner. When the pulverized coal enters the interior of the boiler burner, it can burn more fully and stably, ensuring the full utilization of the pulverized coal, achieving a certain degree of energy-saving effect, and at the same time, it can also achieve better combustion safety and reliability. When the existing pulverized coal distributor is working, it usually needs to transport pulverized coal through high-pressure air for a long time. The high-pressure air plus the friction of the pulverized coal itself usually scour the interior of the pulverized coal distributor for a long time. Under long-term use, the body of the pulverized coal distributor is prone to damage, resulting in adverse effects such as pulverized coal leakage, which seriously affects the service life of the pulverized coal distributor, and further affects the distribution of pulverized coal by the pulverized coal distributor and even the normal combustion of the boiler burner. During the maintenance process of the boiler burner, it is usually necessary to suspend the transportation of pulverized coal, thus affecting the normal operation of the boiler burner. Summary of the Utility Model

[0003] The purpose of the utility model is to address the above-mentioned problems and deficiencies, and provide a pulverized coal distributor that can scrape the hydraulic oil on the inner wall of the kettle well, effectively improve the uniformity of the hydraulic oil being heated, and ensure the quality of the hydraulic oil processing reaction.

[0004] A pulverized coal distributor includes an air inlet pipe;

[0005] On the left and right sides above the air inlet pipe, there are air delivery cylinders. Above the air delivery cylinders, the edges are connected with several branch pipes evenly distributed in a ring at equal intervals. Between the branch pipes and the air inlet pipe, there is an opening and closing component. The opening and closing component includes a flow sensor, a solenoid valve 1, a solenoid valve 2, a PLC controller, and a buzzer alarm. The opening and closing component is used to control the opening and closing of the air delivery cylinders.

[0006] Preferably, the intake pipe is Y-shaped, and a lower pipe is connected to the lower part of the air delivery cylinder. The two lower pipes are respectively connected to the left and right sides of the upper end of the intake pipe through bolts.

[0007] Preferably, a maintenance opening is provided at the upper end of the air delivery cylinder, and a maintenance cover for covering the maintenance opening is connected above the air delivery cylinder through bolts.

[0008] Preferably, a reinforcing ring is connected between the outside of the branch pipe and the air delivery cylinder, and a reinforcing plate is connected to the outside between the lower pipe and the air delivery cylinder.

[0009] Preferably, a number of flow sensors are provided and are respectively installed on the outside of a number of the branch pipes, and the PLC controller and the buzzer alarm are both installed at the upper end of the intake pipe.

[0010] Preferably, solenoid valves II are installed on the outside of the left and right sides of the upper end of the intake pipe, a number of solenoid valves I are provided and are respectively installed on the outside of a number of the branch pipes, and the flow sensors, solenoid valves I, solenoid valves II and the buzzer alarm are all in signal connection with the PLC controller.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The reinforcing plate and the reinforcing ring are made of tungsten steel, which has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, etc. Especially its high hardness and good wear resistance. The reinforcing ring can improve the connection stability between the branch pipe and the air delivery cylinder, and the reinforcing plate can improve the connection stability between the lower pipe and the air delivery cylinder, thereby protecting the connections between the branch pipe and the air delivery cylinder and between the lower pipe and the air delivery cylinder to a certain extent under the impact of high-pressure gas, and improving the stability of the pulverized coal distributor;

[0013] The flow sensor can detect the flow rate of the pulverized coal in the corresponding branch pipe. Set a minimum flow rate inside the PLC controller, and this minimum flow rate is the flow rate inside the branch pipe when the air delivery cylinder or the branch pipe leaks. For example, when the flow sensor outside the left branch pipe detects that the pulverized coal flow rate is less than this minimum flow rate, the flow sensor transmits a signal to the PLC controller. The PLC controller controls the buzzer alarm to emit an alarm sound. At the same time, the PLC controller controls the solenoid valve I and solenoid valve II on the left to close and the solenoid valve I and solenoid valve II on the right to open. At this time, the high-pressure gas and coal ash can be distributed through the lower pipe, air delivery cylinder and branch pipe on the right, avoiding the need to suspend the transportation of coal ash for maintenance when the air delivery cylinder or the branch pipe leaks, and preferably ensuring the continuous supply of coal ash. The buzzer alarm can also remind the user to timely repair the leaking air delivery cylinder or branch pipe. Description of the Drawings

[0014] Figure 1Schematic diagram of the overall front sectional structure of the present utility model;

[0015] Figure 2 For the present utility model Figure 1 Schematic diagram of the enlarged structure of part A;

[0016] Figure 3 For the present utility model Figure 1 Schematic diagram of the enlarged structure of part B.

[0017] Markings in the figure: intake pipe 101, reinforcement plate 102, lower pipe 103, air delivery cylinder 104, maintenance cover 105, inspection opening 106, branch pipe 107, reinforcement ring 108, flow sensor 109, solenoid valve 1 110, solenoid valve 2 111, PLC controller 112, buzzer alarm 113. Specific implementation mode

[0018] As Figures 1 to 3 shown, the present application is a pulverized coal distributor, including an intake pipe 101;

[0019] On the upper left and right sides of the intake pipe 101, air delivery cylinders 104 are provided. At the upper edge of the air delivery cylinder 104, a number of branch pipes 107 are connected in an annular and equally spaced manner. Between the branch pipes 107 and the intake pipe 101, there is an opening and closing assembly. The opening and closing assembly includes a flow sensor 109, solenoid valve 1 110, solenoid valve 2 111, a PLC controller 112, and a buzzer alarm 113. The opening and closing assembly is used to control the opening and closing of the air delivery cylinder 104;

[0020] The intake pipe 101 is in a Y shape. The lower part of the air delivery cylinder 104 is connected to a lower pipe 103. The two lower pipes 103 are respectively connected to the upper left and right sides of the intake pipe 101 through bolts;

[0021] When the pulverized coal distributor is working, the upper ends of a number of branch pipes 107 on the left and right sides are equally spaced and connected to the boiler burner. First, open the solenoid valve 1 110 and solenoid valve 2 111 on one side. For example, first open the solenoid valve 1 110 and solenoid valve 2 111 on the left side, close the solenoid valve 1 110 and solenoid valve 2 111 on the right side, then connect the intake pipe 101 to the pulverized coal conveying structure. The high-pressure gas of the pulverized coal conveying structure drives the pulverized coal into the interior of the intake pipe 101. The pulverized coal is driven by the high-pressure gas and enters the interior of the left air delivery cylinder 104 through the left end of the intake pipe 101. The pulverized coal entering the interior of the left air delivery cylinder 104 can enter the interior of the boiler burner through a number of equally spaced branch pipes 107 on the left side. Ignite in the boiler burner, and at this time the pulverized coal can burn, thus completing the distribution and combustion of the pulverized coal;

[0022] A reinforcing ring 108 is connected between the outside of the branch pipe 107 and the air delivery cylinder 104, and a reinforcing plate 102 is connected to the outside between the lower pipe 103 and the air delivery cylinder 104;

[0023] The materials of the reinforcing plate 102 and the reinforcing ring 108 are tungsten steel, which has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. In particular, its high hardness and wear resistance are better. Since a reinforcing ring 108 is connected between the outside of the branch pipe 107 and the air delivery cylinder 104, and a reinforcing plate 102 is connected to the outside between the lower pipe 103 and the air delivery cylinder 104, the reinforcing ring 108 can improve the connection stability between the branch pipe 107 and the air delivery cylinder 104, and the reinforcing plate 102 can improve the connection stability between the lower pipe 103 and the air delivery cylinder 104, thereby protecting the connections between the branch pipe 107 and the air delivery cylinder 104 and between the lower pipe 103 and the air delivery cylinder 104 to a certain extent under the impact of high-pressure gas, and improving the stability of the pulverized coal distributor;

[0024] A number of flow sensors 109 are provided and are respectively installed on the outside of a number of the branch pipes 107, and the PLC controller 112 and the buzzer alarm 113 are both installed at the upper end of the air inlet pipe 101;

[0025] Two-way solenoid valves 111 are installed on the outer sides of the left and right sides at the upper end of the air inlet pipe 101, a number of solenoid valves 110 are provided and are respectively installed on the outside of a number of the branch pipes 107, and the flow sensors 109, the solenoid valves 110, the two-way solenoid valves 111, and the buzzer alarm 113 are all connected to the PLC controller 112 by signals;

[0026] Since a number of flow sensors 109 are provided and are respectively installed on the outside of a number of branch pipes 107, the flow sensors 109 can detect the flow rate of the pulverized coal in the corresponding branch pipes 107. A minimum flow rate is set inside the PLC controller 112, and this minimum flow rate is the flow rate inside the branch pipe 107 when the air delivery cylinder 104 or the branch pipe 107 leaks. For example, when the flow sensor 109 outside the left branch pipe 107 detects that the pulverized coal flow rate is less than this minimum flow rate, the flow sensor 109 transmits a signal to the PLC controller 112. The PLC controller 112 controls the buzzer alarm 113 to emit an alarm sound. At the same time, the PLC controller 112 controls the left solenoid valve 110 and the two-way solenoid valve 111 to close and opens the right solenoid valve 110 and the two-way solenoid valve 111. At this time, the high-pressure gas and the coal ash can be distributed through the right lower pipe 103, the air delivery cylinder 104, and the branch pipe 107, avoiding the need to suspend the transportation of the coal ash for maintenance when the air delivery cylinder 104 or the branch pipe 107 leaks, preferably ensuring the continuous supply of the coal ash, and the buzzer alarm 113 can also remind the user to promptly repair the leaking air delivery cylinder 104 or branch pipe 107;

[0027] An inspection opening 106 is provided at the upper end of the air delivery cylinder 104, and a maintenance cover 105 for covering the inspection opening 106 is bolted above the air delivery cylinder 104;

[0028] Since an inspection opening 106 is provided at the upper end of the air delivery cylinder 104 and a maintenance cover 105 for covering the inspection opening 106 is bolted above the air delivery cylinder 104, when the user performs maintenance on the air delivery cylinder 104, the bolts between the maintenance cover 105 and the air delivery cylinder 104 can be removed. At this time, the inspection opening 106 can be opened, and the user can then perform maintenance on the inside of the air delivery cylinder 104 through the inspection opening 106. When the user needs to remove the entire air delivery cylinder 104 for maintenance, the bolts between the lower pipe 103 and the intake pipe 101 can be removed, thereby completing the disassembly of the lower pipe 103 and removing the entire air delivery cylinder 104 for maintenance.

Claims

1. A pulverized coal distributor, comprising an intake pipe (101), characterized in that: On the upper left and right sides of the intake pipe (101), air delivery cylinders (104) are provided. At the upper edge of the air delivery cylinder (104), a number of branch pipes (107) are connected in an annular and equally spaced manner. An opening and closing assembly is provided between the branch pipe (107) and the intake pipe (101). The opening and closing assembly includes a flow sensor (109), a solenoid valve one (110), a solenoid valve two (111), a PLC controller (112), and a buzzer alarm (113). The opening and closing assembly is used to control the opening and closing of the air delivery cylinder (104).

2. The pulverized coal distributor according to claim 1, wherein: The intake pipe (101) is in a Y shape. A lower pipe (103) is connected to the lower part of the air delivery cylinder (104). An external reinforcing plate (102) is connected between the two lower pipes (103) and the air delivery cylinder (104). The two lower pipes (103) are respectively connected to the upper left and right sides of the upper end of the intake pipe (101) through bolts.

3. A pulverized coal distributor according to claim 1, characterized in that: An inspection opening (106) is opened at the upper end of the air delivery cylinder (104). A maintenance cover (105) for covering the inspection opening (106) is connected to the upper part of the air delivery cylinder (104) through bolts.

4. A pulverized coal distributor according to claim 1, characterized in that: The inner side of the branch pipe (107) is connected to the air delivery cylinder (104), and there is a reinforcing ring (108) at the connection.

5. The pulverized coal distributor according to claim 2, wherein: A number of flow sensors (109) are provided and are respectively installed outside a number of the branch pipes (107). The PLC controller (112) and the buzzer alarm (113) are both installed at the upper end of the intake pipe (101).

6. The pulverized coal distributor according to claim 5, characterized in that: Solenoid valves two (111) are installed on the outer sides of the upper left and right sides of the upper end of the intake pipe (101). A number of solenoid valves one (110) are provided and are respectively installed outside a number of the branch pipes (107). The flow sensor (109), the solenoid valve one (110), the solenoid valve two (111), and the buzzer alarm (113) are all connected to the PLC controller (112) in a signal manner.

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