Automatic ash discharging system and method for waste gas header pipe

Abstract

The invention provides an automatic ash discharging system and method for waste gas main pipes, the ash discharging system comprises two ash deposition hoppers and an articulated chute, the number of the ash deposition hoppers is two, and the two ash deposition hoppers are respectively arranged at the lower ends of the two waste gas main pipes and are communicated with the waste gas main pipes; a thermocouple is installed at the position, 0.8-1.2 m high, of the bottom of the ash deposition hopper, the thermocouple is used for detecting the temperature, and a first gate valve is installed at the bottom of the ash deposition hopper; the elephant trunk comprises a branch pipe and a main pipe, the upper end of the branch pipe is connected with the first gate valve, the lower end of the branch pipe is communicated with the main pipe, and a second gate valve is arranged on the main pipe. Compared with the prior art, the two waste gas header pipe ash discharging systems are combined, compared with a traditional ash discharging system, the number of equipment sets is reduced by half, and the equipment investment cost is reduced. Meanwhile, as the number of equipment is reduced, fault points are correspondingly reduced, and the equipment fault rate is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sintering equipment, and in particular to an automatic ash unloading system and method for a waste gas main pipe. Background Art

[0002] Sintering equipment is generally equipped with two exhaust mains for exhaust, and each exhaust main is equipped with an ash unloading system. During the exhaust process, the sintering exhaust main will draw small particles on the sintering trolley into the exhaust main, which will be equipped with an ash hopper. Generally, a double-layer ash unloading valve structure is installed under the ash hopper. The two valves are opened and closed in turn, and the accumulated materials are discharged into the belt below.

[0003] In the actual ash unloading process, due to the influence of exhaust main pipe exhaust, the material in the ash hopper is under negative pressure, and the unloading is not smooth. It is necessary to manually clear the blockage at the unloading port, which has high labor intensity and extremely low ash unloading efficiency. At the same time, air leakage occurs during the clearing process, affecting sintering production. In addition, the negative pressure in the sintering ash hopper is too high, and the material level meter cannot be installed. Therefore, sintering ash unloading generally adopts timed cycle unloading. If the unloading is too frequent, the ash seal cannot be formed, and the air leakage points increase. If the unloading interval is too long, it will cause too much material accumulation in the exhaust main pipe, affecting the exhaust and equipment safety. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an automatic ash unloading system and method for the exhaust gas main pipe, which is used to solve the problem in the prior art that the sintering exhaust gas main pipe cannot unload ash in time during the exhaust process, affecting the use of sintering equipment.

[0005] In order to achieve the above-mentioned and other related purposes, the present invention provides an automatic ash unloading system for an exhaust manifold, comprising:

[0006] There are two ash hoppers, which are respectively arranged at the lower ends of two exhaust gas main pipes and are connected to the exhaust gas main pipes; a thermocouple is installed at a position 0.8-1.2m above the bottom of the ash hopper, and the thermocouple is used to detect the temperature. A first gate valve is installed at the bottom of the ash hopper;

[0007] The slide pipe comprises a branch pipe and a main pipe, the upper end of the branch pipe is connected to the first gate valve, the lower end of the branch pipe is communicated with the main pipe, and the main pipe is provided with a second gate valve.

[0008] Optionally, a control unit is also included, and the control unit is used to automatically monitor the temperature of the thermocouple and control the first gate valve and the second gate valve to automatically open and close.

[0009] Optionally, a receiving belt is provided below the main pipe, and the receiving belt is used to transport the ash that falls by its own weight.

[0010] Optionally, a thermocouple is installed at a position 1 m above the bottom of the ash hopper.

[0011] Optionally, both the first gate valve and the second gate valve are electric hydraulic gate valves.

[0012] Accordingly, the present invention also provides an automatic ash unloading method for an exhaust gas main pipe, which adopts any of the above compressor reflux gas energy ash unloading systems, and the ash unloading method comprises the following steps:

[0013] Real-time monitoring of the temperature T at the thermocouple 1 , set the automatic dust removal temperature T 0 ;

[0014] If T 1 ≥T 0 , then open the first gate valve for 50-80s and close the first gate valve;

[0015] Then open the second gate valve for 50-80s, and close the second gate valve to complete one ash unloading.

[0016] Optionally, the first gate valve and the second gate valve are opened for 60 seconds each time.

[0017] Optionally, the automatic dust removal temperature T 0 It is 30℃-70℃.

[0018] Optionally, the automatic dust removal temperature T 0 is 50℃.

[0019] In the scheme implemented by the above-mentioned exhaust main automatic ash unloading system, during the operation of the sintering equipment, small particles of material enter the ash hopper and accumulate during the exhaust main exhaust ... At the same time, by controlling the opening time of the first gate valve, incomplete ash unloading can be achieved, so that the ash hopper does not form an ash seal, effectively reducing the air leakage rate. Compared with the prior art, the two exhaust gas main ash unloading systems in this solution are combined. Compared with the traditional ash unloading system, the number of equipment sets is reduced by half, reducing the equipment investment cost. At the same time, due to the reduction in the number of equipment, the number of failure points is reduced accordingly, reducing the equipment failure rate. In addition, by controlling the opening time of the first gate valve, a certain amount of ash can be maintained in the ash unloading hopper to form an ash seal, which can effectively reduce the air leakage rate. In this solution, the two exhaust gas mains are connected through the ash unloading system, so that the upper and lower pressures of the ash in the ash hopper can be balanced during ash unloading, realizing automatic ash unloading and reducing the labor intensity of employees. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of an automatic ash unloading system for an exhaust manifold is shown as an exemplary embodiment.

[0021] The description of the reference numerals in the embodiments includes:

[0022] The exhaust gas main pipe 10, the ash hopper 11, the thermocouple 12, the gate valve 13, the slide pipe 14, the branch pipe 141, the main pipe 142, the second gate valve 15, and the receiving belt 16. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0024] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0025] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0026] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0027] like Figure 1 As shown, in an exemplary embodiment, the exhaust manifold automatic ash unloading system includes:

[0028] Dust hopper 11, there are two ash hoppers 11, the two ash hoppers 11 are respectively arranged at the lower ends of two exhaust gas main pipes 10, and are connected to the exhaust gas main pipes 10; a thermocouple 12 is installed at a position 0.8-1.2m high at the bottom of the ash hopper 11, the thermocouple 12 is used to detect the temperature, and a first gate valve 13 is installed at the bottom of the ash hopper 11;

[0029] The slide pipe 14 includes a branch pipe 141 and a main pipe 142 . The upper end of the branch pipe 141 is connected to the first gate valve 13 . The lower end of the branch pipe 141 is connected to the main pipe 142 . The main pipe 142 is provided with a second gate valve 15 .

[0030] Among them, the ash hopper 11 is installed at the lower end of the exhaust gas main pipe 10, and a position with more serious ash accumulation can be selected. The interior of the ash hopper 11 can be conical so that the accumulated ash can fall smoothly. The two branch pipes 141 are symmetrically arranged along the main pipe 142, so that the accumulated ash in the chute 14 is in a balanced state during ash unloading, which is more conducive to automatic ash unloading.

[0031] During the specific implementation process, during the operation of the sintering equipment, small particles enter the ash hopper 11 during the exhaust process of the exhaust main pipe 10 and accumulate. When the small particles in the ash hopper 11 have not reached the position of the thermocouple 12, the large couple and the exhaust main pipe 10 are connected. The temperature at the thermocouple 12 is the temperature of the hot air conducted in the exhaust main pipe 10, which is higher than the indoor temperature. When the small particles in the ash hopper 11 accumulate to the position of the thermocouple 12, the accumulated ash covers the thermocouple 12. At this time, the accumulated ash will hinder the conduction of the hot air in the exhaust main pipe 10, causing the temperature at the thermocouple 12 to drop to the same level as the indoor temperature. The height of the ash in the ash hopper 11 can be determined by the temperature of the thermocouple 12. When the height of the ash in the ash hopper 11 exceeds the thermocouple 12, the first gate valve 13 can be opened, and the ash in the ash hopper 11 enters the branch pipe of the chute 14 under the action of its own gravity, and the first gate valve 13 is closed after being opened for a period of time; then the second gate valve 15 is opened, and the ash in the branch pipe 141 enters the main pipe 142 under the action of its own gravity, and can fall from the main pipe 142 to complete the ash unloading process. At the same time, by controlling the opening time of the first gate valve 13, incomplete ash unloading can be achieved, so that the ash hopper 11 does not form an ash seal, effectively reducing the air leakage rate.

[0032] In some embodiments, a control unit is further included, and the control unit is used to automatically monitor the temperature of the thermocouple 12 and control the first gate valve 13 and the second gate valve 15 to automatically open and close. The control unit can realize automatic monitoring of the temperature of the thermocouple 12 and automatic opening and closing of the first gate valve 13 and the second gate valve 15, so that the ash unloading system can realize automatic operation.

[0033] In some embodiments, a receiving belt 16 is provided below the main pipe 142, and the receiving belt 16 is used to convey the ash falling by its own weight. Figure 1 As shown, the receiving belt 16 facilitates the conveyance of the unloaded ash so as to facilitate the processing of the ash.

[0034] In some embodiments, a thermocouple 12 is installed at a height of 1 m at the bottom of the ash hopper 11. Figure 1 As shown, in actual use, an ash seal needs to be formed at the bottom of the ash hopper 11, so it is most appropriate to install the thermocouple 12 at a position of 1m.

[0035] In some embodiments, the first gate valve 13 and the second gate valve 15 are both electric hydraulic gate valves 13. For example, Figure 1 As shown, the electric hydraulic gate valve 13 is more conducive to automatically controlling its opening and closing by using a control unit.

[0036] In some embodiments, the present solution also provides an automatic ash unloading method for the exhaust gas main pipe 10, the ash unloading method adopts any of the above compressor return gas energy ash unloading systems, and the ash unloading method comprises the following steps:

[0037] Monitor the temperature T1 at the thermocouple 12 in real time and set the automatic ash unloading temperature T0;

[0038] If T1 ≥ T0, the first gate valve 13 is opened for 50-80s, and the first gate valve 13 is closed;

[0039] Then open the second gate valve 1550-80s, close the second gate valve 15, and complete one ash unloading.

[0040] Specifically, firstly, according to different production parameters, determine the triggered automatic ash unloading temperature T0 (when there is ash accumulation, the detection temperature is generally the same as the room temperature, and when there is no ash accumulation, the detection temperature reaches above 70°C, so the ash unloading temperature is generally controlled between 50°C and 60°C). The computer collects the temperature of the two thermocouples 12 of the exhaust gas main pipe 10. When the temperature at any point is lower than the triggering ash unloading temperature T0, the ash unloading method is executed. First, open the first gate valve 13 at the same time. After opening, the exhaust gas main pipe 10, the ash hopper 11 and the chute 14 will become a passage, and the upper and lower pressures of the ash in the ash hopper 11 are balanced, and the ash falls by its own weight. Then close the first gate valve 13, and then open the second gate valve 15, and the material falls into the belt below. When the temperature of the two thermocouples 12 is higher than the triggering ash unloading temperature T, stop unloading, and the first gate valve 13 and the second gate valve 15 remain closed. Through the setting of this ash unloading method, the automatic operation of the ash unloading system can be realized, so that the ash unloading system can realize fully automatic ash unloading.

[0041] In some embodiments, the first gate valve 13 and the second gate valve 15 are opened for 60 seconds each time. The opening time of the first gate valve 13 and the second gate valve 15 is to achieve a certain degree of ash unloading. If the time is too long, the accumulated ash will be unloaded completely, and if the time is too short, the accumulated ash cannot be unloaded. According to the load and output of the sintering equipment, it is more appropriate to set it to one minute.

[0042] In some embodiments, the automatic dust unloading temperature T0 is 30° C.-70° C. The automatic dust unloading temperature T0 can be set according to different production parameters. When there is dust accumulation, the detection temperature is generally the same as the room temperature, and when there is no dust accumulation, the detection temperature reaches above 70° C.

[0043] In some embodiments, the T0 automatic ash unloading temperature is 50° C. According to the production parameters of actual sintering equipment, it is most appropriate to set T0 to 50° C.

[0044] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. Automatic ash unloading system for exhaust manifold, characterized by: include: There are two ash hoppers, which are respectively arranged at the lower ends of two exhaust gas main pipes and are connected to the exhaust gas main pipes; a thermocouple is installed at a position 0.8-1.2m above the bottom of the ash hopper, and the thermocouple is used to detect the temperature. A first gate valve is installed at the bottom of the ash hopper; The slide pipe comprises a branch pipe and a main pipe, the upper end of the branch pipe is connected to the first gate valve, the lower end of the branch pipe is communicated with the main pipe, and the main pipe is provided with a second gate valve.

2. The exhaust manifold automatic ash unloading system according to claim 1 is characterized in that: It also includes a control unit, which is used to automatically monitor the temperature of the thermocouple and control the first gate valve and the second gate valve to automatically open and close.

3. The exhaust manifold automatic ash unloading system according to claim 2 is characterized in that: A receiving belt is arranged below the main pipe, and the receiving belt is used to convey the ash that falls by its own weight.

4. The exhaust manifold automatic ash unloading system according to claim 3 is characterized in that: A thermocouple is installed at a position 1 m high at the bottom of the ash hopper.

5. The exhaust manifold automatic ash unloading system according to claim 4 is characterized in that: The first gate valve and the second gate valve are both electric hydraulic gate valves.

6. Automatic ash unloading method for exhaust main pipe, characterized by: It adopts the compressor return gas energy ash unloading system according to any one of claims 1 to 5, and the ash unloading method comprises the following steps: Monitor the temperature T1 at the thermocouple in real time and set the automatic ash unloading temperature T0; If T1 ≥ T0, the first gate valve is opened for 50-80s and then closed; Then open the second gate valve for 50-80s, and close the second gate valve to complete one ash unloading.

7. The automatic ash unloading method for exhaust manifold according to claim 6, characterized in that: The first gate valve and the second gate valve are opened for 60 seconds each time.

8. The automatic ash unloading method for exhaust manifold according to claim 6, characterized in that: The automatic dust unloading temperature T0 is 30°C-70°C.

9. The automatic ash unloading method for exhaust manifold according to claim 8, characterized in that: The automatic dust unloading temperature T0 is 50°C.

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