A single carbonization chamber pressure automatic control device and control method thereof

Abstract

A single carbonization chamber pressure automatic control device and control method thereof, the device comprising a straight bend pipe, a cylinder actuator, an air pressure measuring device, high and low pressure ammonia nozzles, a quick flushing nozzle, a connecting rod, a piston, a sleeve pipe, a straight rod, a fixed cup and a cone head rod. The application provides a single carbonization chamber pressure automatic control device and control method thereof, which can form a negative pressure in the pipe to prevent smoke when loading coal, and can control the pressure in the pipe to be kept within a set value range during the coking process. When the riser cover is opened at the end of coking, a water seal is formed in the pipe to prevent air from entering the gas collecting pipe and the raw coal gas in the gas collecting pipe from overflowing; the device has high control accuracy, simple structure, easy implementation, sensitive adjustment and long service life.

Description

Technical Field

[0001] The invention belongs to the technical field of coking coal gas control devices, and in particular relates to a single carbonization chamber pressure automatic control device and a control method thereof. Background Art

[0002] The pressure of the coke oven carbonization chamber is one of the most important process control parameters in the coking process. High pressure will lead to the leakage of a large amount of harmful raw gas, which will not only cause serious pollution to the surrounding environment, but also damage the coke oven equipment due to combustion. Low pressure will cause coke combustion due to air entering the carbonization chamber, reducing the quality of coke, and in severe cases, it will burn the furnace body and directly affect the life of the coke oven. Therefore, stabilizing the pressure of the coke oven carbonization chamber has always been a difficult problem in coke oven design and production operation.

[0003] Domestic coke ovens generally use a control system to stabilize the gas collecting pipe pressure to indirectly control the carbonization chamber pressure. The gas collecting pipe main pipe control mainly adjusts the entire furnace group through the gas collecting pipe. The pressure of each carbonization chamber is uneven and has a great impact on coal loading and coke pushing. During coking, the different coking periods of each carbonization chamber lead to uneven pressure in the carbonization chamber, which affects the quality of coke; and at the end of coking, the pressure in the carbonization chamber is too low, and air enters the furnace body, prompting the combustion of raw coal gas, increasing the temperature of the gas system, and increasing the burden on the cooling system.

[0004] Since the single carbonization chamber of coke ovens in most coking plants is still of the old-fashioned flap structure, the pressure of the single carbonization chamber cannot be matched and controlled according to the coking process. In addition, the automation transformation is relatively inconvenient. At present, each furnace needs to manually operate the opening and closing of the riser and the switching of high and low pressure ammonia water according to the time point for coal loading and coking. The manual labor intensity is high, the operation frequency is frequent, and it is easy to make mistakes. It is not conducive to the overall automation technology upgrade of the coking process. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a single carbonization chamber pressure automatic control device, comprising: a straight bend pipe, the first end of the straight bend pipe is connected to the riser pipe and the second end is respectively connected to the first end of the sleeve pipe and the first end of the gas collecting pipe, the sleeve pipe extends into the gas collecting pipe, a straight rod and a fixed cup are arranged in the gas collecting pipe, the first end of the straight rod is connected to the first end of the sleeve pipe and the second end is connected to the fixed cup, the fixed cup is arranged below the second end of the sleeve pipe, a drainage hole is arranged at the bottom of the fixed cup, a piston is arranged in the sleeve pipe, a cone head rod is arranged on the piston, and the cone head rod is connected to the drainage hole Yes, an air pressure measuring device and a cylinder actuator are provided on the straight bend pipe, the air pressure measuring device is connected to the inside of the straight bend pipe, and a connecting rod is provided on the cylinder actuator, the first end of the connecting rod is connected to the cylinder actuator and the second end extends into the straight bend pipe and connected to the piston, the air pressure measuring device measures the air pressure data in the straight bend pipe and transmits it to the host computer, and the host computer controls the cylinder actuator to retract or extend the connecting rod and drive the piston to reciprocate in the sleeve tube, so as to drive the cone head rod to contact the drainage hole to block it or leave the drainage hole to expose it.

[0006] Preferably, the straight bend pipe is provided with high and low pressure ammonia water nozzles connected to the interior thereof.

[0007] Preferably, the straight elbow pipe is provided with a quick flushing nozzle connected to the interior thereof.

[0008] Preferably, a water retaining step is provided at the upper end of the piston.

[0009] Preferably, a hole is provided on the water retaining step, and the hole passes through the piston.

[0010] Preferably, the cone head rod is arranged on the piston axis and slides up and down along the axis direction.

[0011] Preferably, a plurality of slots are provided in the circumferential direction of the sleeve tube, and the slots include oblong slots, rectangular slots or stepped slots.

[0012] The present invention also provides a control method for a single carbonization chamber pressure automatic control device, wherein the single carbonization chamber pressure automatic control device is any of the single carbonization chamber pressure automatic control devices described above, and the method comprises the steps of:

[0013] When the process is in the coal loading state, the upper computer controls the cylinder actuator to retract the connecting rod and drive the piston and the cone head rod away from the drainage hole, at which time the drainage hole is completely exposed;

[0014] When the process is in a coking state, the air pressure measuring device measures the air pressure in the straight bend pipe and compares it with the set value, and the upper computer controls the cylinder actuator to extend the connecting rod and drive the piston and the cone head rod to contact the drainage hole. At this time, the cone head rod blocks the drainage hole, and the piston expands and contracts back and forth according to the pressure in the pipe;

[0015] When the process is at the final stage of coking and the riser cover is open, the host computer controls the cylinder actuator to extend the connecting rod, and drives the piston and the cone head rod to seal the drain hole, and ammonia water flows out from the edge of the fixed cup to put it in a water-sealed state.

[0016] The present application provides a single carbonization chamber pressure automatic control device and a control method thereof, which can form a negative pressure in the tube when loading coal to prevent smoke, and can control the pressure in the tube to maintain within a set value range during the coking process. When the riser tube cover is opened at the end of coking, a water seal is formed in the tube to prevent air from entering the gas collecting pipe and the raw coal gas in the gas collecting pipe from overflowing. This device has high control accuracy, simple and easy-to-implement structure, sensitive adjustment and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the state of a single carbonization chamber pressure automatic control device provided by the present invention when loading coal;

[0019] Figure 2 It is a schematic diagram of the state of a single carbonization chamber pressure automatic control device provided by the present invention during the coking process;

[0020] Figure 3 It is a schematic diagram of the state of a single carbonization chamber pressure automatic control device provided by the present invention at the end of coking;

[0021] Figure 4 yes Figure 1 The enlarged schematic diagram at A in the middle;

[0022] Figure 5 It is a schematic diagram of slot holes of a single carbonization chamber pressure automatic control device provided by the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0024] like Figure 1-5 In an embodiment of the present application, the present application provides a single carbonization chamber pressure automatic control device, comprising: a straight bend pipe 1, wherein the first end of the straight bend pipe 1 is connected to the riser and the second end is respectively connected to the first end of the sleeve pipe 8 and the first end of the gas collecting pipe 13, wherein the sleeve pipe 8 extends into the gas collecting pipe 13, wherein a straight rod 9 and a fixed cup 10 are arranged in the gas collecting pipe 13, wherein the first end of the straight rod 9 is connected to the first end of the sleeve pipe 8 and the second end is connected to the fixed cup 10, wherein the fixed cup 10 is arranged below the second end of the sleeve pipe 8, wherein a drainage hole 12 is arranged at the bottom of the fixed cup 10, wherein a piston 7 is arranged in the sleeve pipe 8, wherein a cone head rod 11 is arranged on the piston 7, wherein the cone head rod 11 is connected to the Opposite to the drainage hole 12, an air pressure measuring device 4 and a cylinder actuator 3 are arranged on the straight-bend pipe 1, the air pressure measuring device 4 is communicated with the inside of the straight-bend pipe 1, a connecting rod 6 is arranged on the cylinder actuator 3, a first end of the connecting rod 6 is connected to the cylinder actuator 3 and a second end extends into the straight-bend pipe 1 and is connected to the piston 7, the air pressure measuring device 4 measures the air pressure data in the straight-bend pipe 1 and transmits it to the upper computer, the upper computer controls the cylinder actuator 3 to retract or extend the connecting rod 6 and drive the piston 7 to reciprocate in the sleeve tube 8, so as to drive the cone head rod 11 to contact the drainage hole 12 to block it or leave the drainage hole 12 to expose it.

[0025] like Figure 1-5 In the embodiment of the present application, the straight bend pipe 1 is provided with high and low pressure ammonia water nozzles 2 connected to the interior thereof.

[0026] In the embodiment of the present application, the high- and low-pressure ammonia water nozzle 2 sprays low-pressure circulating ammonia water, which can be used to quickly cool the temperature of the raw coal gas; the high- and low-pressure ammonia water nozzle 2 sprays high-pressure ammonia water, which can cool the temperature of the raw coal gas and is used to form a negative pressure in the pipe when loading coal to prevent smoke.

[0027] like Figure 1-5 In the embodiment of the present application, the straight bend pipe 1 is provided with a quick flushing nozzle 5 connected to the interior thereof, which can regularly flush the components in the pipe.

[0028] like Figure 1-5In the embodiment of the present application, a water retaining step 14 is provided at the upper end of the piston 7. The purpose is that since the rigid fit between the sleeve tube 8 and the piston 7 cannot ensure good sealing, when the riser cover is opened at the end of coking, air may enter the gas collecting pipe 13 or the raw coal gas in the gas collecting pipe 13 may overflow. Therefore, the water retaining step 14 also forms a water seal at the upper end of the piston 7 to ensure sealing.

[0029] In the embodiment of the present application, a hole is provided on the water retaining step 14 , and the hole passes through the piston, so as to reduce ammonia precipitation on the water retaining step 14 .

[0030] In the embodiment of the present application, a plurality of slots are provided in the circumferential direction of the sleeve tube 8 .

[0031] like Figure 1-5 In the embodiment of the present application, the slot includes an oblong slot 15 , a rectangular slot 16 or a stepped slot 17 .

[0032] In the embodiment of the present application, the axis of the lower end of the straight bend pipe 1, the axis of the connecting rod 6, the axis of the piston 7, the axis of the sleeve tube 8, the axis of the fixed cup 10, the axis of the cone head rod 11 and the axis of the drainage hole 12 are located on the same vertical straight line.

[0033] In an embodiment of the present application, the present application also provides a control method for a single carbonization chamber pressure automatic control device, which can be used to control the above-mentioned single carbonization chamber pressure automatic control device, and the method comprises the steps of:

[0034] When the process is in the coal loading state, the upper computer controls the cylinder actuator 3 to retract the connecting rod 6, and drives the piston 7 and the cone head rod 11 away from the drainage hole 12, at which time the drainage hole 12 is completely exposed;

[0035] When the process is in the coking state, the air pressure measuring device 4 measures the air pressure in the straight bend pipe and compares it with the set value, and the upper computer controls the cylinder actuator 3 to extend the connecting rod 6 and drive the piston 7 and the cone head rod 11 to contact the drainage hole 12. At this time, the cone head rod 11 blocks the drainage hole 12, and the piston 7 expands and contracts back and forth according to the pressure in the pipe;

[0036] When the process is in the final stage of coking and the riser cover is open, the host computer controls the cylinder actuator 3 to extend the connecting rod 6, and drives the piston 7 and the cone head rod 11 to block the drainage hole 12, and ammonia water flows out from the edge of the fixed cup 10 to put it in a water-sealed state.

[0037] like Figure 1As shown, a large amount of smoke and dust will be generated in the carbonization chamber when coal is loaded, and the smoke and dust will enter the straight bend pipe 1. The air pressure measuring device 4 measures the air pressure change in the straight bend pipe 1 and sends the data to the host computer. The host computer controls the high- and low-pressure ammonia nozzles 2 to spray high-pressure ammonia and controls the cylinder actuator 3 to drive the piston 7 upward through the connecting rod 6. At this time, the cone head rod 11 also moves upward under the drive of the piston 7, and the cone head of the cone head rod 11 leaves the drainage hole 12, so that the ammonia is quickly discharged. At this time, the flow cross-section of the raw coal gas is the largest, which is conducive to the rapid discharge of the raw coal gas in the carbonization chamber.

[0038] like Figure 2 As shown, in order to keep the pressure of the carbonization chamber stable during the coking process, the air pressure in the straight bend pipe 1 is monitored in real time by the air pressure measuring device 4, and the data is sent to the host computer, and then the host computer gives instructions to make the cylinder actuator 3 drive the piston 7 to move up and down. Since the upper edge of the fixed cup 10 is higher than the lower edge of the sleeve tube 8, the cone head of the cone head rod 11 blocks the drainage hole 12 of the fixed cup 10, and the ammonia water can only overflow from the upper edge of the fixed cup 10. At this time, the raw gas can only flow out from the slot on the sleeve tube 8, so that the size of the slot on the sleeve tube 8 is increased or reduced, thereby adjusting the flow of the raw gas and ensuring the pressure stability of the raw gas in the carbonization chamber;

[0039] like Figure 3 As shown, the cover of the riser is opened at the end of coking. In order to prevent air from entering the gas collecting pipe 13 and prevent the raw coal gas in the gas collecting pipe 13 from overflowing, a water seal should be formed in the pipe. The cylinder actuator 3 drives the piston 7 downward to block the slot on the sleeve pipe 8, and the cone head of the cone head rod 11 also blocks the drainage hole 12 of the fixed cup 10. The upper edge of the fixed cup 10 is higher than the lower edge of the sleeve pipe 8. At this time, the ammonia water can only flow out from the edge of the fixed cup 10, which plays a role of water seal.

[0040] The present application provides a single carbonization chamber pressure automatic control device and a control method thereof. When coal is loaded, negative pressure can be formed in the tube to prevent smoke. During the coking process, the pressure in the tube can be controlled to remain within a set value range. When the riser tube cover is opened at the end of coking, a water seal is formed in the tube to prevent air from entering the gas collecting pipe and raw coal gas in the gas collecting pipe from overflowing. This device has high control accuracy, simple and easy-to-implement structure, sensitive adjustment and long service life.

[0041] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A single carbonization chamber pressure automatic control device, characterized in that: include: A straight bend pipe, wherein the first end of the straight bend pipe is connected to the riser pipe and the second end is respectively connected to the first end of the sleeve pipe and the first end of the gas collecting pipe, the sleeve pipe extends into the gas collecting pipe, a straight rod and a fixing cup are arranged in the gas collecting pipe, the first end of the straight rod is connected to the first end of the sleeve pipe and the second end is connected to the fixing cup, the fixing cup is arranged below the second end of the sleeve pipe, a drainage hole is arranged at the bottom of the fixing cup, a piston is arranged in the sleeve pipe, a cone head rod is arranged on the piston, the cone head rod is opposite to the drainage hole, and an air pressure measuring device is arranged on the straight bend pipe and a cylinder actuator, the air pressure measuring device is in communication with the interior of the straight bend pipe, a connecting rod is provided on the cylinder actuator, a first end of the connecting rod is connected to the cylinder actuator and a second end of the connecting rod extends into the straight bend pipe and is connected to the piston, the air pressure measuring device measures the air pressure data in the straight bend pipe and transmits it to a host computer, the host computer controls the cylinder actuator to retract or extend the connecting rod and drive the piston to reciprocate in the sleeve tube, so as to drive the cone head rod to contact the drain hole to block it or leave the drain hole to expose it; Wherein, a water retaining step is arranged at the upper end of the piston, a hole is arranged on the water retaining step, and the hole passes through the piston.

2. The single carbonization chamber pressure automatic control device according to claim 1, characterized in that: The straight curved pipe is provided with high and low pressure ammonia water nozzles connected to the interior thereof.

3. The single carbonization chamber pressure automatic control device according to claim 1, characterized in that: The straight curved pipe is provided with a quick flushing nozzle connected to the interior thereof.

4. The single carbonization chamber pressure automatic control device according to claim 1, characterized in that: The cone head rod is arranged on the piston axis and slides up and down along the axis direction.

5. The single carbonization chamber pressure automatic control device according to claim 1, characterized in that: The sleeve tube is provided with a plurality of slots in the circumferential direction, wherein the slots include oblong slots, rectangular slots or stepped slots.

6. A control method for a single carbonization chamber pressure automatic control device, characterized in that: The single carbonization chamber pressure automatic control device is a single carbonization chamber pressure automatic control device as claimed in any one of claims 1 to 5, and the method comprises the steps of: When the process is in the coal loading state, the upper computer controls the cylinder actuator to retract the connecting rod and drive the piston and the cone head rod away from the drainage hole, at which time the drainage hole is completely exposed; When the process is in a coking state, the air pressure measuring device measures the air pressure in the straight bend pipe and compares it with the set value, and the upper computer controls the cylinder actuator to extend the connecting rod and drive the piston and the cone head rod to contact the drainage hole. At this time, the cone head rod blocks the drainage hole, and the piston expands and contracts back and forth according to the pressure in the pipe; When the process is at the final stage of coking and the riser cover is open, the host computer controls the cylinder actuator to extend the connecting rod, and drives the piston and the cone head rod to seal the drain hole, and ammonia water flows out from the edge of the fixed cup to put it in a water-sealed state.

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