Nitrogen backflow pigging ash conveying structure of weighing type bin pump
By using a nitrogen reflux cleaning structure in a weighing silo pump, the problem of pipe blockage caused by inaccurate material-to-gas ratio control is solved by utilizing a weighing sensor and a reflux mechanism, thus enabling continuous ash conveying under complex working conditions.
Patent Information
- Application Number
- CN202423237434.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing technologies are not accurate enough in controlling the material-to-air ratio, which makes the silo pump prone to clogging when conveying large amounts of dust, high humidity, heavy viscosity, and long conveying distances, and this is difficult to prevent effectively.
The nitrogen reflux cleaning structure of the weighing silo pump accurately identifies the feed weight and controls the feed air weight through the weighing sensor. The reflux mechanism returns the high-pressure material-air mixture to the ash storage container in case of pipe blockage, preventing pipe blockage and achieving continuous ash conveying.
It enables precise control of the material-to-air ratio under complex working conditions, prevents pipe blockage, and ensures continuous ash conveying operation of the silo pump.
Smart Images
Figure CN223575635U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to pneumatic ash conveying technical field, specifically is a nitrogen backflow pigging ash conveying structure of weighing formula bin pump. BACKGROUND
[0002] As a kind of pneumatic conveying equipment, bin pump is widely used in the conveying of various powder and particle materials, especially in the field of dust removal technology, by the conveying mode of sending from one place to another in closed pipeline by air pressure. The problem of bin pump pipe blockage has been a big problem in the industrial field. In the design of reasonable pneumatic conveying system, not only the characteristics of conveying material, conveying capacity, conveying distance and design pressure and other process parameters should be considered, but also the design of material-air ratio should be paid attention to. The material-air ratio control in the prior art is mainly controlled by feeding time and air pressure, and the material-air ratio cannot be accurately measured. In the working condition of large amount of dust conveying, high humidity, heavy viscosity and long conveying distance, the bin pump pipe blockage cannot be effectively prevented. SUMMARY
[0003] The utility model aims at solving the above-mentioned problem, to provide a nitrogen backflow pigging ash conveying structure of weighing formula bin pump that can realize continuous ash conveying.
[0004] The utility model solves the problem by adopting the technical scheme of:
[0005] A nitrogen backflow pigging ash conveying structure of weighing formula bin pump, comprising a bin pump body, a material level meter, an exhaust pipe and a feeding pipe are arranged on the top of the bin pump body, a feeding valve is arranged on the feeding pipe and connected with a dust storage container, an exhaust valve is arranged on the exhaust pipe, a fluidization disc is arranged on the bottom of the bin pump body, a gas inlet pipe is communicated with one side of the bottom of the bin pump body, a gas inlet valve group is arranged on the gas inlet pipe, a dust conveying pipe is communicated with the other side of the bottom of the bin pump body, a discharging valve is arranged on the dust conveying pipe, a load-bearing support is arranged on the outer periphery of the lower part of the bin pump body, a weighing sensor is arranged on the bottom end of the load-bearing support, a first pressure transmitter is arranged on the top of the bin pump body, and a backflow mechanism is arranged between the dust conveying pipe and the dust storage container.
[0006] The utility model adopting the above technical scheme has the prominent characteristics compared with prior art:
[0007] The weighing sensor accurately identifies the feeding weight and controls the air inlet weight, so as to accurately and reasonably control the material-air ratio. When pipe blockage occurs, the backflow mechanism is opened, and the high-pressure material-air mixture returns to the dust storage container through the backflow mechanism due to pressure difference, preventing pipe blockage caused by insufficient fluidization, and realizing continuous ash conveying.
[0008] As a preferred embodiment, the utility model further provides the technical scheme of:
[0009] Further, the backflow mechanism comprises a backflow pipe between the ash conveying pipe and the ash storage container, and a pipe cleaning valve is arranged on the backflow pipe.
[0010] Further, a second pressure transmitter is arranged on the backflow pipe between the pipe cleaning valve and the ash conveying pipe.
[0011] Further, the exhaust pipe is communicated with the ash storage container.
[0012] Further, a corrugated compensator is arranged between the ash storage container and the feed pipe of the silo pump body. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a front view structural schematic diagram of the embodiment of the utility model;
[0014] Marked in the figure: silo pump body 1, material level meter 2, exhaust pipe 3, feed pipe 4, ash storage container 5, feed valve 6, exhaust valve 7, fluidization disc 8, air inlet pipe 9, air inlet valve group 10, ash conveying pipe 11, discharge valve 12, load-bearing support 13, weighing sensor 14, first pressure transmitter 15, backflow pipe 16, pipe cleaning valve 17, second pressure transmitter 18, corrugated compensator 19. DETAILED DESCRIPTION
[0015] The utility model will be further explained in connection with the embodiment, the purpose is only in better understanding the content of the utility model, therefore, the example does not limit the protection scope of the utility model.
[0016] A nitrogen backflow pipe cleaning ash conveying structure of a weighing type silo pump, comprising a silo pump body 1, the top of the silo pump body 1 is provided with a material level meter 2, an exhaust pipe 3 and a feed pipe 4, the feed pipe 4 is provided with a feed valve 6 and is connected with an ash storage container 5, the exhaust pipe 3 is provided with an exhaust valve 7, the bottom of the silo pump body 1 is provided with a fluidization disc 8, one side of the bottom of the silo pump body 1 is communicated with an air inlet pipe 9, the air inlet pipe 9 is provided with an air inlet valve group 10, the other side of the bottom of the pump body is communicated with an ash conveying pipe 11, the ash conveying pipe 11 is provided with a discharge valve 12, the lower part of the silo pump body 1 is provided with a load-bearing support 13, the bottom end of the load-bearing support 13 is provided with a weighing sensor 14, the top of the silo pump body 1 is provided with a first pressure transmitter 15, and a backflow mechanism is arranged between the ash conveying pipe 11 and the ash storage container 5.
[0017] Further, the backflow mechanism comprises a backflow pipe 16 between the ash conveying pipe 11 and the ash storage container 5, and a pipe cleaning valve 17 is arranged on the backflow pipe 16, when the pipe cleaning valve 17 is opened, the high-pressure material gas mixture returns to the ash storage container 5 through the backflow pipe 16 due to the pressure difference.
[0018] Further, the second pressure transmitter 18 is arranged on the return pipe 16 between the cleaning valve 17 and the ash conveying pipe 11, and the air inlet pipe 9 is still in the air inlet state during the return process, the second pressure transmitter 18 detects the pressure value of the return pipe 16, prevents the pressure value from being too large to cause the fly ash in the ash storage container 5 to be blown away, and when the second pressure transmitter 18 exceeds the safe pressure value, the air inlet valve group 10 is closed to stop the nitrogen from entering, and then the return control is performed.
[0019] Further, the exhaust pipe 3 is communicated with the ash storage container 5, facilitating the smooth feeding.
[0020] Further, the corrugated compensator 19 is arranged between the ash storage container 5 and the feeding pipe 4 of the silo pump body 1, compensates the pipeline displacement, reduces the pipeline stress, protects the pipeline connection part, and improves the reliability of the pipeline system.
[0021] The feeding valve 6 and the exhaust valve 7 are opened when the weight of the accumulated feeding in the ash storage container 5 reaches the set value through the weighing sensor 14, the exhaust valve 7 is opened to ensure that there is no high pressure generated by the nitrogen in the silo pump body 1 at this time, the feeding in the ash storage container 5 is conveyed into the silo pump body 1, the feeding valve 6 and the exhaust valve 7 are closed, the air inlet valve group 10 is opened, the nitrogen enters the silo pump fluidization disc 8 to open the fluidization, the nitrogen entering weight is calculated through the weighing sensor 14, the reasonable control of the material-gas ratio is controlled, the first pressure transmitter 15 detects that the pressure in the silo pump reaches the set pump starting value, the air inlet valve group 10 is closed, and the discharge valve 12 is opened. Under normal circumstances, the discharge valve 12 is opened, the pressure in the silo pump body 1 is reduced, and the discharge valve 12 is closed when the pressure is reduced to the pump stopping value, the ash discharging control of this round is completed, and the next round of cycle control is entered. However, when the silo pump is blocked, the pressure in the silo pump body 1 rises, the pressure detected by the first pressure transmitter 15 exceeds the set point, the air inlet valve group 10 is continuously opened, the cleaning valve 17 is opened, and the high-pressure material-gas mixture returns to the ash storage container 5 through the return pipe 16 due to the pressure difference. During the return process, the pressure value detected by the first pressure transmitter 15 is obviously smaller, and it can be judged that the material-gas mixture is returning. When the pressure detected by the first pressure transmitter 15 decreases to less than the set value of the pump stopping value, the ash conveying pipe 11 is unblocked, the cleaning valve 17 and the discharge valve 12 are closed, and the cleaning is completed.
[0022] The above only describes the preferred and feasible embodiments of the present application, and does not limit the scope of the present application, and any equivalent changes made by applying the content of the present application and the drawings are included in the scope of the present application.
Claims
1. A nitrogen reflux cleaning and ash conveying structure for a weighing silo pump, comprising a silo pump body, a level gauge, an exhaust pipe, and an inlet pipe installed at the top of the silo pump body, an inlet valve installed on the inlet pipe and connected to an ash storage container, an exhaust valve installed on the exhaust pipe, a fluidizing disc installed at the bottom of the silo pump body, an air inlet pipe connected to one side of the bottom of the silo pump body, an air inlet valve assembly installed on the air inlet pipe, and an ash conveying pipe connected to the other side of the bottom of the pump body, with a discharge valve installed on the ash conveying pipe, characterized in that: A load-bearing bracket is installed on the lower outer periphery of the silo pump body, a weighing sensor is installed at the bottom of the load-bearing bracket, a first pressure transmitter is installed on the top of the silo pump body, and a reflux mechanism is installed between the ash conveying pipe and the ash storage container.
2. The nitrogen reflux cleaning and ash conveying structure of the weighing silo pump according to claim 1, characterized in that: The reflux mechanism includes a reflux pipe located between the ash conveying pipe and the ash storage container, and a cleaning valve is installed on the reflux pipe.
3. The nitrogen reflux cleaning and ash conveying structure of the weighing silo pump according to claim 2, characterized in that: A second pressure transmitter is installed on the return pipe, located between the pigging valve and the ash conveying pipe.
4. The nitrogen reflux cleaning and ash conveying structure of the weighing silo pump according to claim 1, characterized in that: The exhaust pipe is connected to the ash storage container.
5. The nitrogen reflux cleaning and ash conveying structure of the weighing silo pump according to claim 1, characterized in that: A corrugated compensator is installed between the feed pipe of the ash storage container and the silo pump body.