A sealing pneumatic system of shaft kiln and overpressure feedback sealing device of shaft kiln

Abstract

The present application relates to a kind of shaft kiln sealing pneumatic system, including cylinder execution unit, air flow regulating unit, gas supply pipeline, air supplement unit and sound-absorbing exhaust unit;Gas supply pipeline is supplied with air to cylinder execution unit via air flow regulating unit, and gas supply pipeline includes sequentially connected compressed air source, air source filter pressure reducing valve, electric detection signal manual stop valve, electromagnetic two-position two-way inlet valve, proportional valve pressure regulating unit, main pipeline throttle valve, check valve;Air supplement unit is supplemented with air to gas supply pipeline, and gas supply pipeline is exhausted by sound-absorbing exhaust unit.The shaft kiln overpressure feedback sealing device is based on kiln top pressure feedback signal, so that single-acting buffer cylinder closes the combined part of rotary hopper and fixed hopper of feeding device in time, avoids a large amount of high-temperature flue gas and dust leakage, greatly reduces the pollution to production environment, and ensures the safety of feeding and surrounding equipment and personnel and the continuous operation of kiln production.

Description

TECHNICAL FIELD

[0001] The present application relates to a shaft kiln device, in particular to a shaft kiln sealing pneumatic system and a shaft kiln overpressure feedback sealing device. BACKGROUND

[0002] The top of the active lime shaft kiln is a rotary feeding device, when the operating pressure in the kiln is greater than the set value due to unexpected conditions, the increase in air pressure causes the upper part of the rotary feeding device to be lifted, causing the sealing device at the joint of the kiln and the feeding device to be damaged, a large amount of hot smoke and dust to be discharged, and the operating environment to be relatively poor. The high temperature of the hot smoke and the large amount of dust have an impact on the equipment and harm the health of the operators. The long time for repair during shutdown affects the normal continuous production of the enterprise.

[0003] Therefore, the joint of the rotary hopper and the fixed hopper of the feeding device is affected by the uncertainty of the kiln pressure, which affects the continuity of production and safe production. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a shaft kiln sealing pneumatic system and a shaft kiln overpressure feedback sealing device to solve the problem of dust overflow of the sealing part of the feeding device at the top of the shaft kiln.

[0005] To achieve the above-mentioned purpose, the following technical solutions are adopted in the present application:

[0006] A shaft kiln sealing pneumatic system, comprising a cylinder execution unit, an air flow adjusting unit, a gas supply pipeline, a gas supplement unit and a sound-attenuating exhaust unit; the gas supply pipeline supplies gas to the cylinder execution unit through the air flow adjusting unit, and the gas supply pipeline comprises a compressed air source, a gas source filter pressure reducing valve, an electric detection signal manual stop valve, an electromagnetic two-position two-way gas inlet valve, a proportional valve pressure regulating unit, a main pipeline throttle valve and a check valve connected in sequence; the gas supplement unit supplements gas to the gas supply pipeline, and the gas supply pipeline is exhausted by the sound-attenuating exhaust unit.

[0007] The proportional valve pressure regulating unit comprises an internal pressure control overflow pressure reducing valve, a micro-fog separator, an electric proportional pressure valve and a pilot-operated internal pressure control overflow pressure reducing valve, the output ends of the internal pressure control overflow pressure reducing valve are respectively connected to the micro-fog separator and the pilot-operated internal pressure control overflow pressure reducing valve, the micro-fog separator is connected to the electric proportional pressure valve, and the electric proportional pressure valve is connected to the pilot-operated internal pressure control overflow pressure reducing valve.

[0008] The gas supplement unit comprises an electromagnetic two-position two-way gas supplement valve, and the electromagnetic two-position two-way gas supplement valve is respectively connected to a gas isolation type accumulator and an electric contact pressure switch.

[0009] The sound-attenuating exhaust unit comprises an electromagnetic two-position two-way exhaust valve, and the electromagnetic two-position two-way exhaust valve is connected to a sound-attenuating exhaust valve.

[0010] The air flow regulating unit comprises a plurality of one-way throttle valves connected in parallel.

[0011] The air cylinder executing unit comprises a plurality of single-acting buffer cylinders, the single-acting buffer cylinders are connected with the one-way throttle valves of the air flow regulating unit through manual stop valves and hoses, and two stroke detection switches are arranged on each single-acting buffer cylinder.

[0012] The single-acting buffer cylinders are arranged along the outer circumference of the top of the shaft kiln, and the piston rods of the single-acting buffer cylinders can abut against the top of the annular sealing plate of the rotary hopper.

[0013] The vertical kiln overpressure feedback sealing device comprises a vertical kiln sealing pneumatic system, a kiln top pressure monitor, a pressure signal grading output instrument and a vertical kiln control system, the kiln top pressure monitor transmits the detected pressure signal to the vertical kiln control system, the vertical kiln control system controls the vertical kiln sealing pneumatic system through the pressure signal grading output instrument, and then drives the single-acting buffer cylinders to act, pressurizes the annular sealing plate of the rotary hopper and maintains the sealing state of the vertical kiln.

[0014] The kiln top pressure monitor extends into the interior of the vertical kiln through a kiln top shell and a protection tube.

[0015] Compared with the prior art, the vertical kiln sealing pneumatic system has the following beneficial effects:

[0016] I. Vertical kiln sealing pneumatic system

[0017] 1) The proportional valve pressure regulating unit adopts an electric proportional pressure valve as a pilot pressure control valve to realize stepless control of pressure, so that the braking force of the system is flexibly adjustable.

[0018] 2) The inlet of the electric proportional pressure valve uses a micro-fog separator to prevent oil mist and impurities from entering the electric proportional pressure valve, improve the performance and service life of the valve, make the system more reliable and increase the service life of the system.

[0019] 3) The single-acting buffer cylinders of the air cylinder executing unit and the stroke detection of the cylinders make the action more controllable. Two stroke detection switches are arranged on each single-acting buffer cylinder to limit the stroke range, and the stop valve is very beneficial to the completion of system shutdown and maintenance work.

[0020] 4) The air flow regulating unit ensures that the action speed of the single-acting cylinders remains consistent.

[0021] II. Vertical kiln overpressure feedback sealing device

[0022] The vertical kiln overpressure feedback sealing device has high working efficiency and fast execution element action reaction, and solves the dust overflow of the sealing part of the top charging device when the vertical kiln hearth overpressure. The vertical kiln overpressure feedback sealing device closes the combined part of the rotary hopper and the fixed hopper of the charging device in time according to the kiln top pressure feedback signal, avoids the leakage of a large amount of high-temperature flue gas and dust, greatly reduces the pollution to the production environment, and ensures the safety of the charging and surrounding equipment and personnel and the continuous operation of the kiln hearth production. The problem of affecting the normal continuous production of enterprises due to long repair and replacement time of parts is avoided, the equipment using the system is safer and more reliable, and the enterprise using the system brings benefits. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the vertical kiln sealing pneumatic system.

[0024] Figure 2 It is a single-acting buffer cylinder installation schematic diagram.

[0025] Figure 3 It is a single-acting buffer cylinder layout diagram.

[0026] Figure 4 It is a kiln top pressure monitor installation schematic diagram.

[0027] Figure 5 It is a circuit principle diagram of the vertical kiln overpressure feedback sealing device.

[0028] Figure 6 It is a pressure control principle diagram of the electric proportional pressure valve.

[0029] In the figure: cylinder execution unit A, gas flow regulation unit B, gas supply pipeline C, air supplement unit D, sound-attenuating exhaust unit E, proportional valve pressure regulation unit F;

[0030] compressed air source 1, air source filter pressure reducing valve 2, electric detection signal manual stop valve 3, electromagnetic two-position two-way air inlet valve 4, internal pressure control overflow pressure reducing valve 5, micro-fog separator 6, electric proportional pressure valve 7, pilot internal pressure control overflow pressure reducing valve 8, main pipeline throttle valve 9, check valve 10, electromagnetic two-position two-way exhaust valve 11, sound-attenuating exhaust valve 12 connected to the electromagnetic two-position two-way exhaust valve, electromagnetic two-position two-way air supplement valve 13, gas isolation type accumulator 14, electric contact pressure switch 15, check throttle valve 16, manual stop valve 17, hose 18, program detection switch 19, single-acting buffer cylinder 20, rotary hopper ring-shaped sealing plate 21, protection tube 22, kiln top pressure monitor 23, kiln top shell 24, pressure signal grading output instrument 25. DETAILED DESCRIPTION

[0031] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] In the description of the present application, it is to be understood by those skilled in the art that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0033] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] As Figures 1-6 A vertical kiln sealing pneumatic system, comprising a cylinder execution unit A, an air flow regulating unit B, a gas supply pipeline C, a gas supplement unit D and a noise elimination exhaust unit E; the gas supply pipeline C supplies gas to the cylinder execution unit A through the air flow regulating unit B, and the gas supply pipeline C comprises a compressed air source 1, an air source filter pressure reducing valve 2, an electric detection signal manual stop valve 3, an electromagnetic two-position two-way inlet valve 4, a proportional valve pressure regulating unit F, a main pipeline throttle valve 9 and a check valve 10 connected in sequence; the gas supplement unit D supplements gas to the gas supply pipeline C, and the gas supply pipeline C is exhausted by the noise elimination exhaust unit E.

[0035] The compressed air source 1 provides a compressed air power source of 0.5-1.2 MPa, which is adjusted to the required pressure of the system by the air source filter pressure reducing valve 2. The electric detection signal manual stop valve 3 is used to send a signal to the system that the stop valve 3 is open or closed, which is used as the basis for starting the system. When the signal is closed, the system cannot supply gas. The electromagnetic two-position two-way inlet valve 4 is used for the on-off of the main pipeline gas source. The main pipeline throttle valve 9 controls the gas supply speed of the vertical kiln control system. The check valve 10 is used to control the gas flow direction of the main pipeline.

[0036] The proportional valve pressure regulating unit F can realize stepless control of pressure, and comprises an internal pressure control overflow pressure reducing valve 5, a micro-mist separator 6, an electric proportional pressure valve 7, and a pilot internal pressure control overflow pressure reducing valve 8. The output ends of the internal pressure control overflow pressure reducing valve 5 are connected to the micro-mist separator 6 and the pilot internal pressure control overflow pressure reducing valve 8 respectively. The micro-mist separator 6 is connected to the electric proportional pressure valve 7, and the electric proportional pressure valve 7 is connected to the pilot internal pressure control overflow pressure reducing valve 8. The inlet of the electric proportional pressure valve 7 uses the micro-mist separator 6 to prevent oil mist and impurities from entering the electric proportional pressure valve 7, thereby improving the performance and service life of the valve, making the system more reliable, and increasing the service life of the system.

[0037] The air supplement unit D comprises an electromagnetic two-position two-way air supplement valve 13 connected to a gas isolation type accumulator 14 and an electric contact pressure switch 15 respectively. When the electromagnetic two-position two-way air supplement valve 13 is turned on, the air supplement unit D supplements air to the air supply pipeline C.

[0038] The sound-attenuating exhaust unit E comprises an electromagnetic two-position two-way exhaust valve 11 connected to a sound-attenuating exhaust valve 12. When the electromagnetic two-position two-way exhaust valve 12 and the sound-attenuating exhaust valve 12 are turned on, the air supply pipeline C exhausts air.

[0039] The air flow regulating unit B comprises a plurality of parallel connected one-way throttling valves 16.

[0040] The cylinder execution unit A comprises a plurality of single-acting buffer cylinders 20. One one-way throttling valve 16 of the air flow regulating unit is connected to two single-acting buffer cylinders 20 in the same group. The one-way throttling valve 16 is used to adjust the pushing speed of each single-acting cylinder to keep consistent. The single-acting buffer cylinder 20 is connected to the one-way throttling valve 16 through a manual stop valve 17 and a hose 18. The hose 18 can isolate and eliminate the influence of vibration and installation errors. Each single-acting buffer cylinder 20 is provided with a stroke detection switch 19.

[0041] The single-acting buffer cylinders 20 are evenly distributed along the outer circumference of the top of the shaft kiln. The piston rod of the single-acting buffer cylinder 20 can top the rotary hopper ring-shaped sealing plate 21 of the shaft kiln.

[0042] A shaft kiln overpressure feedback sealing device comprises a shaft kiln sealing pneumatic system, a kiln top pressure monitor 23, a pressure signal grading output instrument 25, and a kiln control system. The kiln top pressure monitor 23 extends into the interior of the shaft kiln through a kiln top shell 24 and a protection tube 22.

[0043] The kiln top pressure monitor 23 transmits the detected pressure signal to the kiln control system. When the detected pressure of the kiln top pressure monitor 23 is greater than the set pressure, the kiln control system controls the air inlet of the air supply pipeline C of the shaft kiln sealing pneumatic system,

[0044] The vertical kiln control system controls the pressure signal grading output instrument 25 to send different pressure level action signals to the electric proportional pressure valve 7 of the vertical kiln sealing pneumatic system, and the electric proportional pressure valve 7 performs the extension action according to the pressure output, and the single-acting buffer cylinder 20 pressurizes the rotary hopper annular sealing plate to maintain the sealing state of the vertical kiln.

[0045] When the electric contact pressure switch 15 of the air supplement unit detects that the pressure is lower than the set pressure value, the vertical kiln control system sends an air supplement command, at this time the electromagnetic two-position two-way air supplement valve 13 is powered on to connect the pipeline, and the gas isolation type accumulator 14 supplements gas to the gas supply pipeline. When the electric contact switch 15 detects that the pressure reaches the set pressure, the vertical kiln control system closes the electromagnetic two-position two-way air supplement valve 13 to stop supplementing gas to the gas supply pipeline.

[0046] When the kiln top pressure monitor 23 detects that the pressure is the system set value, the vertical kiln control system sends an exhaust command, first closes the electromagnetic two-position two-way air inlet valve 4 on the gas supply pipeline C to stop the main pipeline gas supply, and then the single-acting cylinder 20 exhausts the gas in the cylinder through the pipeline and the electromagnetic two-position two-way exhaust valve 11 and the silencing exhaust valve 12 to the outside of the vertical kiln sealing pneumatic system.

[0047] The preferred embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the specific details in the above-described embodiments, and various simple modifications can be made to the technical solutions of the present application within the technical concept of the present application, and these simple modifications all belong to the protection scope of the present application. In addition, it should be noted that the various specific technical features described in the above-described specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not further describe various possible combination manners. In addition, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the technical concept of the present application, and it should be considered as the disclosed content of the present application.

[0048] In order to make the purpose, technical solutions and technical effects of the present application more clear, the technical solutions in the embodiments of the present application are described clearly and completely. However, the following described embodiments are only some of the embodiments of the present application, not all the embodiments. All other embodiments obtained by those skilled in the art without creative labor on the basis of the embodiments in the present application all belong to the protection scope of the present application.

[0049] Embodiment

[0050] A vertical kiln sealing pneumatic system, comprising a cylinder execution unit A, a gas flow regulating unit B, a gas supply pipeline C, a gas supplement unit D and a sound-eliminating exhaust unit E; the gas supply pipeline C supplies gas to the cylinder execution unit A through the gas flow regulating unit B, and the gas supply pipeline C comprises, in sequence, a compressed air source 1, a gas source filtering and pressure reducing valve 2, an electric detection signal manual cut-off valve 3, an electromagnetic two-position two-way gas inlet valve 4, a proportional valve pressure regulating unit F, a main pipeline throttle valve 9 and a one-way valve 10; the gas supplement unit D supplements gas to the gas supply pipeline C, and the gas supply pipeline C is exhausted by the sound-eliminating exhaust unit E.

[0051] The compressed air source 1 has a filtering level not lower than B level, i.e. fine filtering 0.3 μm, 99% or less of water discharge and 99.9% of oil mist removal.

[0052] The proportional valve pressure regulating unit F comprises an internal pressure control overflow pressure reducing valve 5, a micro-mist separator 6, an electric proportional pressure valve 7 and a pilot-operated internal pressure control overflow pressure reducing valve 8, the output ends of the internal pressure control overflow pressure reducing valve 5 are connected to the micro-mist separator 6 and the pilot-operated internal pressure control overflow pressure reducing valve 8 respectively, the micro-mist separator 6 is connected to the electric proportional pressure valve 7, and the electric proportional pressure valve 7 is connected to the pilot-operated internal pressure control overflow pressure reducing valve 8.

[0053] The gas supplement unit D comprises an electromagnetic two-position two-way gas supplement valve 13, the electromagnetic two-position two-way gas supplement valve 13 is normally closed, and the electromagnetic two-position two-way gas supplement valve 13 is connected to a gas isolation type energy accumulator 14 and an electric contact pressure switch 15 respectively. When the electromagnetic two-position two-way gas supplement valve 13 is turned on, the gas supplement unit supplements gas to the gas supply pipeline.

[0054] The sound-eliminating exhaust unit E comprises an electromagnetic two-position two-way exhaust valve 11, and a sound-eliminating exhaust valve 12 is connected to the electromagnetic two-position two-way exhaust valve 11. The electromagnetic two-position two-way exhaust valve 11 is normally open, and the electromagnetic two-position two-way exhaust valve 11 and the sound-eliminating exhaust valve 12 exhaust gas from the gas supply pipeline when turned on.

[0055] The gas flow regulating unit B comprises three parallel one-way throttle valves 16.

[0056] The cylinder execution unit A comprises six single-acting buffer cylinders 20, which are evenly distributed along the outer circumference of the top of the vertical kiln, and the piston rod of the single-acting buffer cylinder 20 can abut against the top of the rotary hopper ring-shaped sealing plate 21 of the vertical kiln.

[0057] One one-way throttle valve 16 of the gas flow regulating unit is connected to two single-acting buffer cylinders 20 in the same group, and the one-way throttle valve 16 is used to regulate the pushing speed of each group of single-acting cylinders to keep consistent, the single-acting buffer cylinder 20 is connected to the one-way throttle valve 16 through a manual cut-off valve 17 and a hose 18, the hose 18 can isolate and eliminate the influence of vibration and installation error; a stroke detection switch 19 is arranged on each single-acting buffer cylinder 20.

[0058] The vertical kiln overpressure feedback sealing device comprises a vertical kiln sealing pneumatic system, a kiln top pressure monitor 23, a pressure signal grading output instrument 25, a vertical kiln control system, and the kiln top pressure monitor 23 extends into the interior of the vertical kiln through a kiln top shell 24 and a protection pipe 22. The maximum set value of the production pressure of the kiln is 0.1 MPa.

[0059] The kiln top pressure monitor 23 transmits the detected pressure signal to the vertical kiln control system. When the pressure detected by the kiln top pressure monitor 23 is less than or equal to 0.1 MPa, the single-acting buffer air cylinder 20 does not act. When the pressure detected by the kiln top pressure monitor 23 is greater than 0.1 MPa, the vertical kiln control system controls the air supply pipeline C of the vertical kiln sealing pneumatic system to intake air, and the vertical kiln control system controls the pressure signal grading output instrument 25 to send different pressure level action signals to the electric proportional pressure valve 7 of the vertical kiln sealing pneumatic system. The electric proportional pressure valve 7 outputs pressure, and the single-acting buffer air cylinder 20 performs the action of extending to pressurize the annular sealing plate of the rotary hopper, thereby maintaining the sealing state of the vertical kiln.

[0060] When the electric contact pressure switch 15 of the air supplementing unit detects that the pressure is lower than the set pressure value, the vertical kiln control system sends an air supplementing instruction. At this time, the electromagnetic two-position two-way air supplementing valve 13 is electrically connected to the pipeline, the gas isolation type accumulator 14 supplements gas to the air supply pipeline, and when the electric contact pressure switch 15 detects that the pressure reaches the set pressure, the vertical kiln control system closes the electromagnetic two-position two-way air supplementing valve 13 to stop supplementing air to the air supply pipeline.

[0061] When the pressure detected by the kiln top pressure monitor 23 is less than or equal to 0.1 MPa, the vertical kiln control system sends an air exhaust command. First, the electromagnetic two-position two-way air intake valve 4 on the air supply pipeline C is closed to stop the main pipeline air supply, and then the single-acting air cylinder 20 discharges the gas in the cylinder through the pipeline and the electromagnetic two-position two-way exhaust valve 11 and the sound-attenuating exhaust valve 12 to the outside of the vertical kiln sealing pneumatic system.

[0062] The kiln top pressure monitor 23 transmits the detected pressure signal to the vertical kiln control system, and the vertical kiln control system controls the vertical kiln sealing pneumatic system to drive the single-acting buffer air cylinder to act, thereby pressurizing the annular sealing plate of the rotary hopper to maintain the sealing state of the vertical kiln.

[0063] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vertical kiln sealing pneumatic system, characterized in that, It includes a cylinder actuator unit, an airflow regulating unit, an air supply pipeline, an air replenishment unit, and a silencer exhaust unit; the air supply pipeline supplies air to the cylinder actuator unit via the airflow regulating unit, and the air supply pipeline includes a compressed air source, an air source filter and pressure reducing valve, an electrical detection signal manual shut-off valve, a solenoid two-position two-way intake valve, a proportional valve pressure regulating unit, a main pipeline throttle valve, and a check valve connected in sequence; the air replenishment unit replenishes air to the air supply pipeline, and the air supply pipeline exhausts air from the silencer exhaust unit; The proportional valve pressure regulating unit includes an internal pressure control overflow pressure reducing valve, a mist separator, an electro-proportional pressure valve, and a pilot-operated internal pressure control overflow pressure reducing valve. The output end of the internal pressure control overflow pressure reducing valve is connected to the mist separator and the pilot-operated internal pressure control overflow pressure reducing valve, respectively. The mist separator is connected to the electro-proportional pressure valve, and the electro-proportional pressure valve is connected to the pilot-operated internal pressure control overflow pressure reducing valve. The airflow regulating unit includes multiple parallel one-way throttle valves; The cylinder actuator includes multiple single-acting buffer cylinders. The single-acting buffer cylinders are connected to the one-way throttle valve of the airflow regulating unit through a manual shut-off valve and a hose. Each single-acting buffer cylinder is equipped with two stroke detection switches.

2. The vertical kiln sealing pneumatic system according to claim 1, characterized in that, The gas replenishment unit includes an electromagnetic two-position two-way gas replenishment valve, which is connected to a gas-isolated accumulator and an electrical contact pressure switch.

3. The vertical kiln sealing pneumatic system according to claim 1, characterized in that, The sonic exhaust unit includes an electromagnetic two-position two-way exhaust valve, and the sonic two-position two-way exhaust valve is connected to the sonic exhaust valve.

4. The vertical kiln sealing pneumatic system according to claim 1, characterized in that, The single-acting buffer cylinders are evenly distributed along the outer circumference of the top of the vertical kiln, and the piston rod of the single-acting buffer cylinder can be in contact with the annular sealing plate of the rotating hopper of the vertical kiln.

5. A vertical kiln overpressure feedback sealing device, characterized in that, The system includes the vertical kiln sealing pneumatic system as described in claim 1, as well as a kiln top pressure monitor, a pressure signal graded output device, and a vertical kiln control system. The kiln top pressure monitor transmits the detected pressure signal to the vertical kiln control system. The vertical kiln control system controls the vertical kiln sealing pneumatic system through the pressure signal graded output device, thereby driving the single-acting buffer cylinder to pressurize the rotating hopper annular sealing plate and maintain the vertical kiln in a sealed state.

6. The vertical kiln overpressure feedback sealing device according to claim 5, characterized in that, The kiln top pressure monitoring instrument extends into the vertical kiln through the kiln top shell and protective pipe.

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