A delivery pump device

Abstract

This invention relates to a delivery pump device, the device comprising a 20M 3 The system includes a nitrogen tank, a conveying pump 1, a conveying pump 2, a coal feeding pipeline, a coal conveying pipeline, a coal powder collector, a vibrating screen, a rotary valve, a No. 5 blast furnace coal powder silo, a No. 4 blast furnace coal powder silo, a conveying pump 1 conveying air valve 1, a conveying pump 1 conveying air valve 2, a conveying pump 1 conveying air valve 3, a conveying pump 2 conveying air valve 1, a conveying pump 2 conveying air valve 2, a conveying pump 2 conveying air valve 3, and a conveying pump 1 conveying air valve 1, etc. This technical solution enables the conveying pumps to continuously supply coal to the coal powder silo, reducing the environmental risks of vibrating screen blockage and loose connections emitting coal powder.

Description

Technical Field

[0001] This invention relates to a conveying pump device, belonging to the field of pulverized coal conveying technology for blast furnace pulverized coal injection. Background Technology

[0002] Since the D-series pulverizing conveying pumps were put into operation in July 2021, the venting pipes of conveying pump one and conveying pump two have been frequently blocked after one month of use. After stopping pulverizing, the manual valve of the venting pipe is disassembled, and maintenance personnel use a hammer to continuously knock on the venting pipe while continuously blowing the pipe with compressed air. The time required to clear the venting pipe is very long, at least 3 hours. This seriously affects the hourly output of the high-speed mill in the pulverizing system, which cannot meet the requirements of the high coal ratio of the blast furnace, affecting the coal consumption per unit hour of the blast furnace and the stable and smooth operation of the blast furnace. By utilizing planned ventilation shutdowns to lift the ash from the top of the vent pipe to the top of the bag filter hopper, coal dust often accumulates in the ash hopper, causing it to overflow into the vent pipe. This blockage in the vent pipe of the conveying pump can easily lead to clogging of the vibrating screen if the pulverizing process is not stopped in time. This can result in coal dust leakage from the vibrating screen during pulverizing, causing environmental pollution at the pulverized coal injection site. Additionally, the flexible connection at the inlet of the vibrating plug can also become clogged, potentially leading to environmental incidents. Therefore, a new solution is urgently needed to address these technical problems. Summary of the Invention

[0003] This invention addresses the problems existing in the prior art by providing a conveying pump device. This technical solution enables the conveying pump to continuously supply coal to the coal powder silo, reducing the environmental risks of vibrating screen blockage and flexible connection leakage of coal powder.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: a delivery pump device, the device comprising a 20M... 3 Nitrogen tank, conveying pump 1, conveying pump 2, coal feeder pipeline, coal conveying pipeline, coal powder collector, vibrating screen, rotary valve, No. 5 blast furnace coal powder bin, No. 4 blast furnace coal powder bin, conveying pump 1 conveying air valve 1, conveying pump 1 conveying air valve 2, conveying pump 1 conveying air valve 3, conveying pump 2 conveying air valve 1, conveying pump 2 conveying air valve 2, conveying pump 2 conveying air valve 3, conveying pump 1 inlet valve, conveying pump 1 inlet valve, conveying pump 1 outlet valve, conveying pump 2 outlet valve, conveying pump 2 conveying valve 1, conveying pump 1 conveying valve 1, conveying pump 2 conveying valve 2, conveying pump 1 conveying valve 2, conveying pump 1 exhaust valve, conveying pump 2 exhaust valve, conveying pump 1 coal feeder valve, conveying pump 2 coal feeder valve, coal feeder valve purging nitrogen shut-off valve, purging nitrogen pipeline, coal powder collector safety nitrogen valve, nitrogen tank outlet manual valve 3, nitrogen tank outlet pressure regulating valve 2, nitrogen tank outlet manual valve 2, and nitrogen tank outlet pressure regulating valve 1, the 20M 3 The nitrogen tank is located to the left of transfer pump one and transfer pump two, the 20M 3The nitrogen tank is connected to the first and second conveying pumps via conveying gas pipelines. The conveying gas pipelines (37) and (38) are equipped with a manual valve for the nitrogen tank outlet, a pressure regulating valve for the nitrogen tank outlet, a manual valve for the nitrogen tank outlet, a pressure regulating valve for the nitrogen tank outlet, a conveying gas valve for the first conveying pump, a conveying gas valve for the first conveying pump, a conveying gas valve for the first conveying pump, a conveying gas valve for the first conveying pump, a conveying gas valve for the first conveying pump, a conveying gas valve for the second conveying pump, and a conveying gas valve for the second conveying pump. A vibrating screen is installed on the upper part of the first and second conveying pumps. The vibrating screen is connected to the first and second conveying pumps via a coal discharge pipeline. The coal discharge pipeline is equipped with a coal discharge valve for the first conveying pump, a coal discharge valve for the second conveying pump, an inlet valve for the first conveying pump, and an inlet valve for the second conveying pump.

[0005] The coal feeding pipe is connected to the left side via a purging nitrogen pipe. The purging pipe is equipped with a coal feeding valve and a purging nitrogen shut-off valve. The pulverized coal collector is located above the vibrating screen. The vibrating screen and the pulverized coal collector are connected via the coal feeding pipe. The coal feeding pipe is equipped with a star-shaped unloader. The upper part of the pulverized coal collector is connected to a safety nitrogen pipe. The safety nitrogen pipe is equipped with a safety nitrogen valve for the pulverized coal collector. The pulverized coal collector is connected to conveying pump one and conveying pump two via pressure relief pipes. The pressure relief pipes are equipped with exhaust valves for conveying pump one and conveying pump two. Conveying pump one and conveying pump two are connected to the pulverized coal silos of blast furnace No. 5 and No. 4 via a coal conveying pipe and a pulverized coal conveying pipe shared by conveying pump one and conveying pump two. The coal conveying pipe is equipped with an outlet valve for conveying pump one and an outlet valve for conveying pump two, as well as a conveying valve one for conveying pump one and a conveying valve one for conveying pump two. The shared pulverized coal conveying pipe is equipped with a conveying valve two for conveying pump two and a conveying valve two for conveying pump one.

[0006] A method for conveying coal using a conveying pump device, the method comprising the following steps:

[0007] Step 1: Open the inlet valve of the delivery pump.

[0008] Step 2: Open the coal discharge valve of the conveying pump;

[0009] Step 3: When the weight of the conveyor pump one reaches 8t, open the inlet valve and coal discharge valve of the conveyor pump two;

[0010] Step 4: Close the coal discharge valve of the conveying pump;

[0011] Step 5: Close the inlet valve of the transfer pump;

[0012] Step 6: Open both the first and second delivery valves of the delivery pump;

[0013] Step 7: Simultaneously open the first conveying air valve, the second conveying air valve, the third conveying air valve, and the outlet valve of the conveying pump to supply coal to the coal powder silo.

[0014] Step 8: When the tank weight of the first pump becomes 0T, close the first pump air valve, the second pump air valve, the third pump air valve, the outlet valve, and the first pump air valve.

[0015] Step 9: Open the first, second, and third air valves of the first conveyor pump. When the pressure of the first conveyor pump is 150Pa, close the first, second, and third air valves of the first conveyor pump and open the exhaust valve of the first conveyor pump to release the nitrogen pressure from the conveyor pump to the coal powder collector.

[0016] Step 10: When the weight of the conveyor pump 2 reaches 8t, open the inlet valve and coal discharge valve of the conveyor pump 1.

[0017] Step 11: Close the coal supply valve of the conveying pump;

[0018] Step 12: Close the second inlet valve of the transfer pump;

[0019] Step 13: Open the second delivery valve and the first delivery valve of the second delivery pump;

[0020] Step 14: Simultaneously open the delivery air valve 1, delivery air valve 2, delivery air valve 3, and outlet valve of the second delivery pump;

[0021] Step 15: When the tank weight of the second transfer pump becomes 0T, close the first transfer air valve, the second transfer air valve, the third transfer air valve, the outlet valve, and the first transfer valve of the second transfer pump.

[0022] Step 16: Open the air valve 1, air valve 2 and air valve 3 of the second pump. When the pressure of the second pump is 150Pa, close the air valve 1, air valve 2 and air valve 3 of the second pump and open the exhaust valve of the second pump.

[0023] Step 17: Repeat steps 2 to 17 to ensure that the conveying pump continuously supplies coal to the coal powder silo.

[0024] A method for installing a delivery pump device, the method comprising the following steps:

[0025] a. Fix the bag collector on the steel frame platform, and weld a section of pipe to the conical part of the bag collector. The welding dimensions are determined according to the specific dimensions in the drawings.

[0026] b. Install the star-shaped ash discharge valve onto the pipe in the upper collector cone section, install a pipe section below the star-shaped ash discharge valve, and install a vibrating screen below this pipe section. The welding dimensions should be positioned according to the specific dimensions in the drawings.

[0027] c. Install a section of pipe under the vibrating screen, and then install two more sections of pipe at a certain angle behind this section of pipe. The welding dimensions are determined according to the specific dimensions in the drawings.

[0028] d. Install 20m³ pump one and pump two on the fixed platform, and position the welding dimensions according to the specific dimensions in the drawings;

[0029] e. 10m 3 The nitrogen cylinder is installed on the fixed platform, and the welding dimensions are determined according to the specific dimensions in the drawings.

[0030] f. Connect one section of pipe to the nitrogen tank outlet and install a manual valve. After connecting the manual valve to the pipe section, connect three pipes to this pipe section. One pipe connects to the tee pipe under the vibrating screen, one pipe connects to the first conveying pump, and the other pipe connects to the second conveying pump. The welding dimensions are determined according to the specific dimensions in the drawings.

[0031] g. Install an inlet valve on the top of both pump 1 and pump 2. The welding dimensions should be determined according to the specific dimensions in the drawings.

[0032] h. Connect a section of pipe to the top right side of both pump 1 and pump 2, connect an exhaust valve to the back of the pipe, and connect another section of pipe after the valve directly to the cone of the pulverized coal collector. The welding dimensions should be determined according to the specific dimensions in the drawings.

[0033] I. Connect the nitrogen manual valve to the left side of pump 1 and pump 2, connect a section of pipe after the valve, connect a pressure regulating valve after the pipe, connect another section of pipe after the valve, and connect three pipes to pump 1 and pump 2 after the pipe. Install three gas valves on the pipes, and connect pipes to pump 1 and pump 2 after the valves. The welding dimensions are determined according to the specific dimensions in the drawings.

[0034] j. Connect pump 1 and pump 2 to the outlet valve, connect a section of pipeline after the valve, and connect the conveying valve after the pipeline. The welding dimensions are determined according to the specific dimensions in the drawing.

[0035] K. Connect a section of pipeline after the conveying valves of conveying pump 1 and conveying pump 2 to the top of the No. 4 blast furnace pulverized coal and the No. 5 blast furnace pulverized coal silo. Connect the conveying valve before this section of pipeline enters the top of the pulverized coal silo, and connect a section of pipeline after the valve directly to the top of the No. 4 blast furnace pulverized coal silo and the No. 5 blast furnace pulverized coal silo. The welding dimensions are positioned according to the specific dimensions in the drawings.

[0036] Compared with existing technologies, this invention has the following advantages: 1. The method is simple and convenient to operate; 2. It reduces equipment maintenance costs; 3. It ensures the coal supply per unit hour of blast furnace, ensures the completion of the high coal ratio of blast furnace, and ensures stable and smooth operation of blast furnace; 4. It realizes continuous coal supply from the conveying pump to the pulverized coal silo; 5. It prevents coal blockage in the venting pipe of the conveying pump; 6. It eliminates the environmental risks of coal blockage in the vibrating screen and coal dust leakage from the flexible connection. This technical solution is a supplementary improvement to the process of pulverized coal injection system in blast furnace smelting of metallurgical systems. It is simple to operate, practical, easy to operate and control, and safe and reliable. It solves the problem of continuous coal supply from the conveying pump to the pulverized coal silo when there is no pulverized coal silo below the pulverized coal collector, solves the problem of blockage in the venting pipe of the conveying pump, and solves the environmental risks of vibrating screen blockage and coal dust leakage from the flexible connection. It addresses the convenience of blast furnace production operation and fills the gaps in this process. It can achieve good economic benefits and satisfactory social benefits, and it is worth promoting and using this method in the same industry. Attached Figure Description

[0037] Figure 1 This is a simplified structural diagram illustrating the application effect of the present invention.

[0038] In the diagram: 1-Pulverized coal collector, 2-Rotary rotary valve, 3-Vibrating screen, 4-Pump 1, 5-Pump 2, 6-Pulverized coal bin for blast furnace No. 5, 7-Pulverized coal bin for blast furnace No. 4, 8-Safety nitrogen valve for pulverized coal collector, 9-Purge nitrogen shut-off valve for coal discharge valve, 10-Pump 1 coal discharge valve, 11-Pump 2 coal discharge valve, 12-Nitrate tank outlet manual valve 1, 13-Nitrate tank manual valve, 14-Nitrate tank drain valve, 15-Nitrate tank outlet manual valve 2, 16-Nitrate tank outlet pressure regulating valve 1, 17-Pump 1 conveying gas valve 1, 18-Pump 1 conveying gas valve 2, 19- 20-Inlet valve of pump 1, 21-Exhaust valve of pump 1, 22-Outlet valve of pump 1, 23-Manual valve 3 for nitrogen tank outlet, 24-Pressure regulating valve 2 for nitrogen tank outlet, 25-Inlet valve 1 of pump 2, 26-Inlet valve 2 of pump 2, 27-Inlet valve 3 of pump 2, 28-Inlet valve of pump 2, 29-Exhaust valve of pump 2, 30-Outlet valve of pump 2, 31-Inlet valve 1 of pump 2, 32-Inlet valve 1 of pump 1, 33-Inlet valve 2 of pump 2, 34-Inlet valve 2 of pump 1, 35-20M 3 Nitrogen tank, 36-Purge nitrogen pipeline, 37-Transfer pump 2 gas pipeline, 38-Transfer pump 1 gas pipeline, 39-Coal conveying pipeline, 40-Transfer pump 1 pressure relief pipeline, 41-Transfer pump 2 coal conveying pipeline, 42-Transfer pump 2 pressure relief pipeline, 43-Coal conveying pipeline, 44-Powder conveying pipeline shared by transfer pump 1 and transfer pump 2. Detailed Implementation

[0039] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0040] Example 1: See Figure 1 A delivery pump device, the device comprising 20M 3 Nitrogen tank 35, conveying pump 1 4, conveying pump 2 5, coal feeder 39, coal conveying pipeline 43, coal conveying pipeline 44, pulverized coal collector 1, vibrating screen 3, rotary valve 2, pulverized coal bin for blast furnace No. 5 6, pulverized coal bin for blast furnace No. 4 7, conveying pump 1 conveying air valve 1 17, conveying pump 1 conveying air valve 2 18, conveying pump 1 conveying air valve 3 19, conveying pump 2 conveying air valve 1 25, conveying pump 2 conveying air valve 2 26, conveying pump 2 conveying air valve 3 27, inlet valve for conveying pump 1 20, inlet valve for conveying pump 1 28, outlet valve for conveying pump 1 22, conveying... Pump 2 outlet valve 30, pump 2 conveying valve 1 31, pump 1 conveying valve 1 32, pump 2 conveying valve 2 33, pump 1 conveying valve 2 34, pump 1 exhaust valve 21, pump 2 exhaust valve 29, pump 1 coal discharge valve 10, pump 2 coal discharge valve 11, coal discharge valve 9, purging nitrogen shut-off valve, purging nitrogen pipeline 36, coal powder collector safety nitrogen valve 8, nitrogen tank outlet manual valve 3 23, nitrogen tank outlet pressure regulating valve 2 24, nitrogen tank outlet manual valve 2 15, and nitrogen tank outlet pressure regulating valve 1 16, the 20M 3 Nitrogen tank 35 is located to the left of transfer pump 4 and transfer pump 5, the 20M 3 Nitrogen tank 35 is connected to conveying pump 4 and conveying pump 5 via conveying gas pipelines 37 and 38. The conveying gas pipelines 37 and 38 are equipped with a nitrogen tank outlet manual valve 23, a nitrogen tank outlet pressure regulating valve 24, a nitrogen tank outlet manual valve 15, a nitrogen tank outlet pressure regulating valve 16, a conveying gas valve 17 for conveying pump 1, a conveying gas valve 28 for conveying pump 1, a conveying gas valve 39 for conveying pump 2, and a conveying gas valve 26 for conveying pump 2. A vibrating screen 3 is installed above conveying pump 4 and conveying pump 5. The vibrating screen 3 is connected to conveying pump 1 and conveying pump 2 via coal discharge pipelines 39 and 41. The coal discharge pipelines 39 and 41 are equipped with a coal discharge valve 10 for conveying pump 1, a coal discharge valve 11 for conveying pump 2, an inlet valve 20 for conveying pump 1, and an inlet valve 28 for conveying pump 2.

[0041] The coal feeding pipe 39 is connected to the left side via a purging nitrogen pipe 36. The purging pipe is equipped with a coal feeding valve and a purging nitrogen shut-off valve 9. The coal dust collector 1 is positioned above the vibrating screen 3. The vibrating screen 3 and the coal dust collector 1 are connected via the coal feeding pipe. The coal feeding pipe is equipped with a star-shaped unloader 2. A safety nitrogen pipe is connected to the upper part of the coal dust collector 1. The safety nitrogen pipe is equipped with a safety nitrogen valve 8 for the coal dust collector. The coal dust collector 1 is connected to the first conveying pump 4 and the second conveying pump 5 via pressure relief pipes 40 and 42. Next, the pressure relief pipes 40 and 42 are equipped with exhaust valve 21 for pump one and exhaust valve 29 for pump two. Pump one 4 and pump two 5 are connected to pulverized coal bin 6 of blast furnace No. 5 and pulverized coal bin 7 of blast furnace No. 4 through coal conveying pipe 43 and pulverized coal conveying pipe 44 shared by pump one and pump two. The coal conveying pipe is equipped with outlet valve 22 for pump one and outlet valve 30 for pump two, conveying valve 32 for pump one and conveying valve 31 for pump two. The shared pulverized coal conveying pipe 44 is equipped with conveying valve 33 for pump two and conveying valve 34 for pump one.

[0042] Example 2: See Figure 1 A method for conveying coal using a conveying pump device, the method comprising the following steps:

[0043] Step 1: Open the inlet valve of the delivery pump.

[0044] Step 2: Open the coal discharge valve of the conveying pump;

[0045] Step 3: When the weight of the conveyor pump one reaches 8t, open the inlet valve and coal discharge valve of the conveyor pump two;

[0046] Step 4: Close the coal discharge valve of the conveying pump;

[0047] Step 5: Close the inlet valve of the transfer pump;

[0048] Step 6: Open both the first and second delivery valves of the delivery pump;

[0049] Step 7: Simultaneously open the first conveying air valve, the second conveying air valve, the third conveying air valve, and the outlet valve of the conveying pump to supply coal to the coal powder silo.

[0050] Step 8: When the tank weight of the first pump becomes 0T, close the first pump air valve, the second pump air valve, the third pump air valve, the outlet valve, and the first pump air valve.

[0051] Step 9: Open the first, second, and third air valves of the first conveyor pump. When the pressure of the first conveyor pump is 150Pa, close the first, second, and third air valves of the first conveyor pump and open the exhaust valve of the first conveyor pump to release the nitrogen pressure from the conveyor pump to the coal powder collector.

[0052] Step 10: When the weight of the conveyor pump 2 reaches 8t, open the inlet valve and coal discharge valve of the conveyor pump 1.

[0053] Step 11: Close the coal supply valve of the conveying pump;

[0054] Step 12: Close the second inlet valve of the transfer pump;

[0055] Step 13: Open the second delivery valve and the first delivery valve of the second delivery pump;

[0056] Step 14: Simultaneously open the delivery air valve 1, delivery air valve 2, delivery air valve 3, and outlet valve of the second delivery pump;

[0057] Step 15: When the tank weight of the second transfer pump becomes 0T, close the first transfer air valve, the second transfer air valve, the third transfer air valve, the outlet valve, and the first transfer valve of the second transfer pump.

[0058] Step 16: Open the air valve 1, air valve 2 and air valve 3 of the second pump. When the pressure of the second pump is 150Pa, close the air valve 1, air valve 2 and air valve 3 of the second pump and open the exhaust valve of the second pump.

[0059] Step 17: Repeat steps 2 through 17 to ensure continuous coal supply from the conveying pump to the pulverized coal silo. This solution reduces the frequency of clogging in the conveying pump's pressure relief pipe, reduces the risk of pulverized coal leakage from the vibrating screen and flexible connections, and ensures the company meets A-standard requirements. It also adds a purging nitrogen pipeline to ensure a continuous and smooth flow of pulverized coal into the conveying pump; reduces the need for a pulverized coal silo and dust collector, saving on construction and maintenance costs; and uses ceramic wear-resistant materials inside the coal conveying pipeline, extending its service life, reducing the chance of pipe wear-through, and minimizing environmental pollution from pulverized coal leakage.

[0060] Example 3: See Figure 1 A method for installing a delivery pump device, the method comprising the following steps:

[0061] a. Fix the bag collector on the steel frame platform, and weld a section of pipe to the conical part of the bag collector. The welding dimensions are determined according to the specific dimensions in the drawings.

[0062] b. Install the star-shaped ash discharge valve onto the pipe in the upper collector cone section, install a pipe section below the star-shaped ash discharge valve, and install a vibrating screen below this pipe section. The welding dimensions should be positioned according to the specific dimensions in the drawings.

[0063] c. Install a section of pipe under the vibrating screen, and then install two more sections of pipe at a certain angle behind this section of pipe. The welding dimensions are determined according to the specific dimensions in the drawings.

[0064] d. Install 20m³ pump one and pump two on the fixed platform, and position the welding dimensions according to the specific dimensions in the drawings;

[0065] e. 10m 3 The nitrogen cylinder is installed on the fixed platform, and the welding dimensions are determined according to the specific dimensions in the drawings.

[0066] f. Connect one section of pipe to the nitrogen tank outlet and install a manual valve. After connecting the manual valve to the pipe section, connect three pipes to this pipe section. One pipe connects to the tee pipe under the vibrating screen, one pipe connects to the first conveying pump, and the other pipe connects to the second conveying pump. The welding dimensions are determined according to the specific dimensions in the drawings.

[0067] g. Install an inlet valve on the top of both pump 1 and pump 2. The welding dimensions should be determined according to the specific dimensions in the drawings.

[0068] h. Connect a section of pipe to the top right side of both pump 1 and pump 2, connect an exhaust valve to the back of the pipe, and connect another section of pipe after the valve directly to the cone of the pulverized coal collector. The welding dimensions should be determined according to the specific dimensions in the drawings.

[0069] I. Connect the nitrogen manual valve to the left side of pump 1 and pump 2, connect a section of pipe after the valve, connect a pressure regulating valve after the pipe, connect another section of pipe after the valve, and connect three pipes to pump 1 and pump 2 after the pipe. Install three gas valves on the pipes, and connect pipes to pump 1 and pump 2 after the valves. The welding dimensions are determined according to the specific dimensions in the drawings.

[0070] j. Connect pump 1 and pump 2 to the outlet valve, connect a section of pipeline after the valve, and connect the conveying valve after the pipeline. The welding dimensions are determined according to the specific dimensions in the drawing.

[0071] K. Connect a section of pipeline after the conveying valves of conveying pump 1 and conveying pump 2 to the top of the No. 4 blast furnace pulverized coal and the No. 5 blast furnace pulverized coal silo. Connect the conveying valve before this section of pipeline enters the top of the pulverized coal silo, and connect a section of pipeline after the valve directly to the top of the No. 4 blast furnace pulverized coal silo and the No. 5 blast furnace pulverized coal silo. The welding dimensions are positioned according to the specific dimensions in the drawings.

[0072] Working Principle: The coal powder collector continuously collects qualified coal powder ground by the medium-speed mill. The coal powder continuously enters the conveying pump. A purging nitrogen line is installed in the coal discharge pipeline to ensure a continuous flow of coal powder into the conveying pump. The conveying pump continuously transports the coal powder to the coal powder silo through a 20 cubic meter nitrogen tank with 6 kg of nitrogen. After coal conveying, the nitrogen from the conveying pump is directly discharged from the vent pipe to the cone of the coal powder collector and then discharged into the atmosphere through the chimney of the main exhaust fan. The coal powder carried in the nitrogen is directly collected by the filter bag. The characteristic of this invention is that it does not change the requirements of the original design process. By adding the process pipelines and valves of this invention, the conveying pump device can continuously supply coal to the coal powder silo, meeting the requirements of the process design. The original pressure relief pipeline of the conveying pump is raised 0.5 meters upwards towards the middle of the collector; a purging nitrogen pipeline is added to the coal discharge pipeline between the conveying pump and the vibrating screen; one coal powder silo is eliminated between the coal powder collector and the conveying pump; the dust collector on the top of the coal powder silo is eliminated; and ceramic wear-resistant material is used in the internal structure of the pipe bend between the conveying pump outlet and the coal powder silo.

[0073] This method is simple, practical, easy to understand, easy to learn, easy to operate, easy to control, and safe and reliable. It solves the problem of continuously supplying coal to the coal powder silo by the conveying pump when there is no coal powder silo at the bottom of the coal powder collector, solves the problem of blockage in the vent pipe of the conveying pump, and eliminates the environmental risks of blockage in the vibrating screen and coal powder leakage from the flexible connection. It addresses the convenience of blast furnace production operations and fills the gaps in this process. It can achieve both good economic benefits and satisfactory social benefits, and is worthy of being promoted and used in the same industry.

[0074] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A method for conveying coal using a conveying pump device, characterized in that, The delivery pump unit includes 20M 3 Nitrogen tank, conveying pump 1, conveying pump 2, coal feed pipe, coal conveying pipe, pulverized coal collector, vibrating screen, rotary valve, pulverized coal bin for blast furnace No. 5, pulverized coal bin for blast furnace No. 4, conveying pump 1 conveying air valve 1, conveying pump 1 conveying air valve 2, conveying pump 1 conveying air valve 3, conveying pump 2 conveying air valve 1, conveying pump 2 conveying air valve 2, conveying pump 2 conveying air valve 3, inlet valve for conveying pump 1, inlet valve for conveying pump 2, outlet valve for conveying pump 1, outlet valve for conveying pump 2, conveying valve 1 for conveying pump 2, conveying valve 1 for conveying pump 1, conveying valve 1 for conveying pump 2, conveying valve 2 for conveying pump 1, exhaust valve for conveying pump 1, exhaust valve for conveying pump 2, coal feed valve for conveying pump 1, coal feed valve for conveying pump 2, purging nitrogen shut-off valve for coal feed valve, purging nitrogen pipe, safety nitrogen valve for pulverized coal collector, manual valve 3 for nitrogen tank outlet, manual valve 2 for nitrogen tank outlet, and manual valve 2 for nitrogen tank outlet, as well as the 20M 3 The nitrogen tank is located to the left of transfer pump one and transfer pump two, the 20M 3 The nitrogen tank is connected to conveying pump 1 and conveying pump 2 via a conveying gas pipeline. The conveying gas pipeline is equipped with a manual outlet valve for the nitrogen tank, a pressure regulating valve 2 for the nitrogen tank outlet, a manual outlet valve 2 for the nitrogen tank, a pressure regulating valve 1 for the nitrogen tank outlet, a conveying gas valve 1 for conveying pump 1, a conveying gas valve 2 for conveying pump 1, a conveying gas valve 3 for conveying pump 1, a conveying gas valve 1 for conveying pump 2, and a conveying gas valve 3 for conveying pump 2. A vibrating screen is installed above conveying pump 1 and conveying pump 2. The vibrating screen is connected to conveying pump 1 and conveying pump 2 via a coal discharge pipeline. The coal discharge pipeline is equipped with a coal discharge valve for conveying pump 1, a coal discharge valve for conveying pump 2, an inlet valve for conveying pump 1, and an inlet valve for conveying pump 2. The left side of the coal feeding pipeline is connected to the purging nitrogen pipeline. The purging nitrogen pipeline is equipped with a coal feeding valve and a purging nitrogen shut-off valve. The pulverized coal collector is located above the vibrating screen. The vibrating screen and the pulverized coal collector are connected through the coal feeding pipeline. The coal feeding pipeline is equipped with a star-shaped unloader. The upper part of the pulverized coal collector is connected to a safety nitrogen pipeline. The safety nitrogen pipeline is equipped with a safety nitrogen valve for the pulverized coal collector. The pulverized coal collector is connected to conveying pump one and conveying pump two through pressure relief pipeline one and pressure relief pipeline two. Pressure relief pipeline one and pressure relief pipeline two are equipped with exhaust valves for conveying pump one and conveying pump two, respectively. Conveying pump one and conveying pump two are connected to the pulverized coal bins of blast furnace No. 5 and blast furnace No. 4 through a coal conveying pipeline and a pulverized coal conveying pipeline shared by conveying pump one and conveying pump two. The coal conveying pipeline is equipped with an outlet valve for conveying pump one and an outlet valve for conveying pump two, as well as a conveying valve one for conveying pump one and a conveying valve one for conveying pump two. The shared pulverized coal conveying pipeline is equipped with a conveying valve two for conveying pump two and a conveying valve two for conveying pump one. The method includes the following steps: Step 1: Open the inlet valve of the delivery pump. Step 2: Open the coal discharge valve of the conveying pump; Step 3: When the weight of the conveyor pump one reaches 8t, open the inlet valve and coal discharge valve of the conveyor pump two; Step 4: Close the coal discharge valve of the conveying pump; Step 5: Close the inlet valve of the transfer pump; Step 6: Open both the first and second delivery valves of the delivery pump; Step 7: Simultaneously open the first conveying air valve, the second conveying air valve, the third conveying air valve, and the outlet valve of the conveying pump to supply coal to the coal powder silo. Step 8: When the tank weight of the first pump becomes 0T, close the first pump air valve, the second pump air valve, the third pump air valve, the outlet valve, and the first pump air valve. Step 9: Open the first, second, and third air valves of the first conveyor pump. When the pressure of the first conveyor pump is 150Pa, close the first, second, and third air valves of the first conveyor pump and open the exhaust valve of the first conveyor pump to release the nitrogen pressure from the conveyor pump to the coal powder collector. Step 10: When the weight of the conveyor pump 2 reaches 8t, open the inlet valve and coal discharge valve of the conveyor pump 1. Step 11: Close the coal supply valve of the conveying pump; Step 12: Close the second inlet valve of the transfer pump; Step 13: Open the second delivery valve and the first delivery valve of the second delivery pump; Step 14: Simultaneously open the delivery air valve 1, delivery air valve 2, delivery air valve 3, and outlet valve of the second delivery pump; Step 15: When the tank weight of the second transfer pump becomes 0T, close the first transfer air valve, the second transfer air valve, the third transfer air valve, the outlet valve, and the first transfer valve of the second transfer pump. Step 16: Open the air valve 1, air valve 2 and air valve 3 of the second pump. When the pressure of the second pump is 150Pa, close the air valve 1, air valve 2 and air valve 3 of the second pump and open the exhaust valve of the second pump. Step 17: Repeat steps 2 to 17 to ensure that the conveying pump continuously supplies coal to the coal powder silo.

2. A method for installing a delivery pump device, characterized in that, The delivery pump unit includes 20M 3 Nitrogen tank, conveying pump 1, conveying pump 2, coal feed pipe, coal conveying pipe, pulverized coal collector, vibrating screen, rotary valve, pulverized coal bin for blast furnace No. 5, pulverized coal bin for blast furnace No. 4, conveying pump 1 conveying air valve 1, conveying pump 1 conveying air valve 2, conveying pump 1 conveying air valve 3, conveying pump 2 conveying air valve 1, conveying pump 2 conveying air valve 2, conveying pump 2 conveying air valve 3, inlet valve for conveying pump 1, inlet valve for conveying pump 2, outlet valve for conveying pump 1, outlet valve for conveying pump 2, conveying valve 1 for conveying pump 2, conveying valve 1 for conveying pump 1, conveying valve 1 for conveying pump 2, conveying valve 2 for conveying pump 1, exhaust valve for conveying pump 1, exhaust valve for conveying pump 2, coal feed valve for conveying pump 1, coal feed valve for conveying pump 2, purging nitrogen shut-off valve for coal feed valve, purging nitrogen pipe, safety nitrogen valve for pulverized coal collector, manual valve 3 for nitrogen tank outlet, manual valve 2 for nitrogen tank outlet, and manual valve 2 for nitrogen tank outlet, as well as the 20M 3 The nitrogen tank is located to the left of transfer pump one and transfer pump two, the 20M 3 The nitrogen tank is connected to conveying pump 1 and conveying pump 2 via a conveying gas pipeline. The conveying gas pipeline is equipped with a manual outlet valve for the nitrogen tank, a pressure regulating valve 2 for the nitrogen tank outlet, a manual outlet valve 2 for the nitrogen tank, a pressure regulating valve 1 for the nitrogen tank outlet, a conveying gas valve 1 for conveying pump 1, a conveying gas valve 2 for conveying pump 1, a conveying gas valve 3 for conveying pump 1, a conveying gas valve 1 for conveying pump 2, and a conveying gas valve 3 for conveying pump 2. A vibrating screen is installed above conveying pump 1 and conveying pump 2. The vibrating screen is connected to conveying pump 1 and conveying pump 2 via a coal discharge pipeline. The coal discharge pipeline is equipped with a coal discharge valve for conveying pump 1, a coal discharge valve for conveying pump 2, an inlet valve for conveying pump 1, and an inlet valve for conveying pump 2. The left side of the coal feeding pipeline is connected to the purging nitrogen pipeline. The purging nitrogen pipeline is equipped with a coal feeding valve and a purging nitrogen shut-off valve. The pulverized coal collector is located above the vibrating screen. The vibrating screen and the pulverized coal collector are connected through the coal feeding pipeline. The coal feeding pipeline is equipped with a star-shaped unloader. The upper part of the pulverized coal collector is connected to a safety nitrogen pipeline. The safety nitrogen pipeline is equipped with a safety nitrogen valve for the pulverized coal collector. The pulverized coal collector is connected to conveying pump one and conveying pump two through pressure relief pipeline one and pressure relief pipeline two. Pressure relief pipeline one and pressure relief pipeline two are equipped with exhaust valves for conveying pump one and conveying pump two, respectively. Conveying pump one and conveying pump two are connected to the pulverized coal bins of blast furnace No. 5 and blast furnace No. 4 through a coal conveying pipeline and a pulverized coal conveying pipeline shared by conveying pump one and conveying pump two. The coal conveying pipeline is equipped with an outlet valve for conveying pump one and an outlet valve for conveying pump two, as well as a conveying valve one for conveying pump one and a conveying valve one for conveying pump two. The shared pulverized coal conveying pipeline is equipped with a conveying valve two for conveying pump two and a conveying valve two for conveying pump one. The method includes the following steps: a. Fix the bag collector on the steel frame platform, and weld a section of pipe to the conical part of the bag collector. The welding dimensions are determined according to the specific dimensions in the drawings. b. Install the rotary valve onto the pipe in the upper collector cone section, install a pipe section below the rotary valve, and then install a vibrating screen below this pipe section. The welding dimensions should be determined according to the specific dimensions in the drawings. c. Install a section of pipe under the vibrating screen, and then install two more sections of pipe at a certain angle behind this section of pipe. The welding dimensions are determined according to the specific dimensions in the drawings. d. Install pump one and pump two on the fixed platform, and position the welding dimensions according to the specific dimensions in the drawings; e. 20M 3 The nitrogen cylinder is installed on the fixed platform, and the welding dimensions are determined according to the specific dimensions in the drawings. f. Connect one section of pipe to the nitrogen tank outlet and install a manual valve. After connecting the manual valve to the pipe section, connect three pipes to this pipe section. One pipe connects to the tee pipe under the vibrating screen, one pipe connects to the first conveying pump, and the other pipe connects to the second conveying pump. The welding dimensions are determined according to the specific dimensions in the drawings. g. Install an inlet valve on the top of both pump 1 and pump 2. The welding dimensions should be determined according to the specific dimensions in the drawings. h. Connect a section of pipe to the top right side of both pump 1 and pump 2, connect an exhaust valve to the back of the pipe, and connect another section of pipe after the valve directly to the cone of the pulverized coal collector. The welding dimensions should be determined according to the specific dimensions in the drawings.

1. Connect the nitrogen manual valve to the left side of pump 1 and pump 2. Connect a section of pipe after the nitrogen manual valve. Connect a pressure regulating valve after the pipe. Connect another section of pipe after the pressure regulating valve. Connect three pipes to pump 1 and pump 2. Install three gas valves on the pipes. Connect pipes to pump 1 and pump 2 after the valves. The welding dimensions are determined according to the specific dimensions in the drawings. j. Connect pump 1 and pump 2 to the outlet valve, connect a section of pipeline after the valve, and connect the conveying valve after the pipeline. The welding dimensions are determined according to the specific dimensions in the drawing. K. Connect a section of pipeline after the conveying valves of conveying pump 1 and conveying pump 2 to the top of the No. 4 blast furnace pulverized coal and the No. 5 blast furnace pulverized coal silo. Connect the conveying valve before this section of pipeline enters the top of the pulverized coal silo, and connect a section of pipeline after the valve directly to the top of the No. 4 blast furnace pulverized coal silo and the No. 5 blast furnace pulverized coal silo. The welding dimensions are positioned according to the specific dimensions in the drawings.

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