Device for recycling high-temperature flue gas of boiler after heat storage oxidation of ultralow-concentration gas

Abstract

The utility model provides a boiler high-temperature flue gas recycling device after ultralow-concentration gas heat storage oxidation, which relates to the technical field of flue gas recycling, and comprises a box body, two sides of the box body are fixedly connected with delivery pipes, one side of each delivery pipe is provided with a pressure relief device, the pressure relief device comprises a bent pipe, and the bent pipe is connected with the delivery pipes. The inner wall of the bent pipe is fixedly connected with a round block, an air channel is formed in the round block, and two round grooves are formed in the round block. By arranging the pressure relief device, when the pressure in the air conveying pipe is large, two piston blocks in the round block move to open the through hole, and the air conveying pipe is not prone to falling off; smoke can enter the air flue through the two circular grooves in one end of the bent pipe and the through holes, then directly enters the box body through the bent pipe, does not participate in heat recycling and is output through the conveying pipe at the other end for pressure relief, and it is avoided as much as possible that due to the fact that internal pressure of the conveying pipe is too large, the structure of the joint of the conveying pipe and the box body deforms, and smoke leakage is caused.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas recycling technology field especially relates to super low concentration gas heat accumulation oxidation after boiler high temperature flue gas recycling device. BACKGROUND

[0002] The gas heat accumulation oxidation utilization project first needs to improve the methane concentration in the waste gas, the commonly used method is to mix the low concentration gas and the waste gas uniformly, so as to improve the purpose of the methane concentration of the waste gas, the mixed gas is sent into the heat accumulation oxidation furnace in advance through the pipeline and carries out the oxidation reaction and releases heat, the heat accumulation oxidation of the gas produces heat, and the excess heat can be used twice through the high temperature flue gas recycling device.

[0003] The flue gas temperature generated by the gas heat accumulation oxidation is about 120 DEG, when using the high temperature flue gas recycling device, the flue gas can increase the pressure of the pipeline part in the recycling device, and long-term operation can cause the connection between the pipeline and the device to produce the phenomenon of gap due to excessive air pressure, resulting in the problem of equipment leakage affecting the heat recovery effect. UTILITY MODEL CONTENTS

[0004] The utility model discloses a boiler high temperature flue gas recycling device after super low concentration gas heat accumulation oxidation is provided to solve the problem that when using the high temperature flue gas recycling device, the flue gas can increase the pressure of the pipeline part in the recycling device, and long-term operation can cause the connection between the pipeline and the device to produce the phenomenon of gap due to excessive air pressure, resulting in the problem of equipment leakage affecting the heat recovery effect.

[0005] In order to realize the above-mentioned purpose, the utility model discloses a boiler high temperature flue gas recycling device after super low concentration gas heat accumulation oxidation, including the box, the both sides fixed connection of the box have the conveying pipe, the top of the box is provided with gas inlet pipe, the bottom fixed connection of the box has a plurality of support legs, one side of the conveying pipe is provided with pressure relief device, the pressure relief device includes the elbow pipe, the both ends of the elbow pipe are fixedly connected with one side of the conveying pipe and one side of the box, the inner wall of the elbow pipe is fixedly connected with the round block, the inside of the round block is equipped with the air channel, the inside of the round block is equipped with two round grooves, the inner wall one side of the round groove is equipped with the through hole, the through hole penetrates the round groove and the air channel, the inner wall of the round groove is slidably connected with the piston block, one end of the piston block is fixedly connected with the round rod, the outer surface of the round rod is slid on the inner wall of the round block, one end of the round block is fixedly connected with the two L shaped blocks, the outer surface of the round rod is slid on the inner wall of the L shaped block, the outer surface of the round rod is provided with the spring, the both ends of the spring are fixedly connected with one side of the round rod and one side of the L shaped block.

[0006] The effect achieved by the above-mentioned components is that when the flue gas recycling device is used to recycle the flue gas generated in the heat extraction process of the gas heat accumulation oxidation, one end of the conveying pipe is connected with the flue gas outlet end of the gas heat accumulation device, the gas conveying pipe is connected with the gas pipe at the top end and the outer side of the box, the flue gas enters the inside of the box through the gas conveying pipe, and the flue gas heats the gas moving in the gas pipe inside the box; when the pressure inside the gas conveying pipe is relatively large, the flue gas entering the inside of the elbow pipe pushes the piston blocks in the two circular grooves inside the circular block to move in the direction of the circular rod, the one end of the circular rod slides on the inner wall of the L-shaped block and compresses the springs on the outer surface of the circular rod, when the piston blocks move to the farthest end of the inner wall of the circular groove, the through hole is opened, the flue gas can pass through the through hole into the air duct through the two circular grooves at one end of the elbow pipe, and then directly enters the inside of the box through the other end of the conveying pipe to release pressure, so as to avoid the structure at the connection between the conveying pipe and the box from being deformed due to the excessive pressure in the conveying pipe, and the flue gas from leaking, and when the pressure in the conveying pipe is smaller, the springs on the outer surface of the two circular rods restore to the original state and push the two circular rods to move in the original direction, so that the piston blocks return to the original position and close the through hole.

[0007] Preferably, one end of the circular block is fixedly connected with two cylinders, and the two cylinders are located outside the L-shaped block and the spring.

[0008] The effect achieved by the above-mentioned components is that the spring is wrapped by the cylinder, so that the normal use of the spring is avoided as much as possible.

[0009] Preferably, one end of the circular block is fixedly connected with a sealing strip, and the sealing strip is made of rubber.

[0010] The effect achieved by the above-mentioned components is that the rubber sealing strip can further seal the contact between the outer surface of the circular block and the inner wall of the elbow pipe, so as to avoid the flue gas from leaking as much as possible.

[0011] Preferably, one end of the piston block is provided with a groove, and the inner wall of the groove is conical.

[0012] The effect achieved by the above-mentioned components is that when the flue gas gathers at one end of the circular block, it is easier to enter one end of the two piston blocks and push the piston blocks to move.

[0013] Preferably, the two ends of the box are provided with supporting devices, the supporting device comprises a slot rod, one end of the slot rod is fixedly connected with one side of the box, the inner wall of the slot rod is slidably connected with a sliding rod, one end of the sliding rod is fixedly connected with a supporting plate, one side of the sliding rod is fixedly connected with a screw rod, and the outer surface of the screw rod is threadedly connected with a threaded ring.

[0014] The effects achieved by the components are that after the flue gas pipeline is connected with the conveying pipe by using the recycling device, the horizontal position of the sliding rod and the supporting plate can be adjusted by pushing the sliding rod to slide on the inner wall of the groove rod at one side of the box, the supporting plate is located below the conveying pipe or the connection between the conveying pipe and the flue gas pipeline, the threaded ring is moved on the outer surface of the screw rod in the direction of the groove rod by rotating the threaded ring, the position of the sliding rod is fixed by pressing one side of the threaded ring against one side of the groove rod, the conveying pipe is supported by the supporting plate, and the structural stability of the connection between the conveying pipe and the box is improved.

[0015] Preferably, the outer surface of the threaded ring is fixedly connected with a plurality of protrusions which are circumferentially distributed on the outer surface of the threaded ring.

[0016] The effects achieved by the components are that the threaded ring can be more conveniently rotated at the protrusions on the outer surface of the threaded ring and is not easy to slip.

[0017] Preferably, the end of the screw rod away from the sliding rod is fixedly connected with a stopper, and the length of the stopper is greater than the diameter of the screw rod.

[0018] The effects achieved by the components are that the movement range of the threaded ring on the outer surface of the screw rod can be limited by arranging the stopper, so that the threaded ring will not fall off the outer surface of the screw rod when the threaded ring is rotated outward.

[0019] Preferably, the top end of the sliding rod is fixedly connected with a supporting rod, and the end of the supporting rod away from the sliding rod is fixedly connected with the bottom end of the supporting plate.

[0020] The effects achieved by the components are that the bottom of the supporting plate can be further supported by arranging the supporting rod, and the structural stability of the connection between the sliding rod and the supporting plate is improved.

[0021] Compared with the prior art, the advantages and positive effects of the utility model are that:

[0022] In the utility model, when the pressure inside the gas conveying pipe is relatively large, the two piston blocks inside the circular block move to open the through hole, so that the flue gas can pass through the two circular grooves at one end of the bent pipe, enter the gas channel through the through hole, and then directly enter the box through the bent pipe without participating in heat recycling and being output through the conveying pipe at the other end to release pressure. The internal pressure of the conveying pipe is avoided from being too large to cause the structure at the connection with the box to deform and cause flue gas leakage. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0024] Figure 2 It is a partial cross-section three-dimensional structure schematic view of the bent pipe of the utility model;

[0025] Figure 3 A place local amplification stereo structure schematic view of the utility model Figure 2

[0026] Figure 4 A place local amplification stereo structure schematic view of the utility model

[0027] Figure 5 A place local amplification stereo structure schematic view of the utility model

[0028] Legend: 1, box; 2, pressure relief device; 3, support device; 4, conveying pipe; 5, support leg; 21, elbow pipe; 22, round block; 23, airway; 24, through hole; 25, round groove; 26, piston block; 27, round rod; 28, spring; 29, L-shaped block; 210, cylinder; 211, sealing strip; 212, groove; 31, groove rod; 32, sliding rod; 33, support plate; 34, screw rod; 35, threaded ring; 36, protruding block; 37, stop block; 38, support rod. DETAILED DESCRIPTION

[0029] Example 1, as Figures 1-5 ​As shown, the super-low concentration gas heat accumulation oxidation boiler high-temperature flue gas recycling device, including box 1, both sides of box 1 are fixedly connected with conveying pipe 4, the top end of box 1 is provided with gas inlet pipe, the bottom end of box 1 is fixedly connected with a plurality of supporting legs 5, one side of conveying pipe 4 is provided with pressure relief device 2, pressure relief device 2 includes elbow pipe 21, both ends of elbow pipe 21 are fixedly connected with one side of conveying pipe 4 and one side of box 1, the inner wall of elbow pipe 21 is fixedly connected with round block 22, the inside of round block 22 is provided with air channel 23, the inside of round block 22 is provided with two circular grooves 25, the inner wall of circular groove 25 is provided with through hole 24, through hole 24 penetrates circular groove 25 and air channel 23, the inner wall of circular groove 25 is slidably connected with piston block 26, one end of piston block 26 is fixedly connected with round rod 27, the outer surface of round rod 27 slides on the inner wall of round block 22, one end of round block 22 is fixedly connected with two L-shaped blocks 29, the outer surface of round rod 27 slides on the inner wall of L-shaped block 29, the outer surface of round rod 27 is provided with spring 28, both ends of spring 28 are fixedly connected with one side of round rod 27 and one side of L-shaped block 29, when the flue gas recycling device is used to recover the flue gas generated in the process of taking heat from the gas heat accumulation oxidation, one end of conveying pipe 4 is connected with the flue gas outlet end of the gas heat accumulation equipment, the gas conveying pipeline is connected with the gas pipe at the top end and the outside of box 1, the flue gas enters the inside of box 1 through the gas conveying pipe and heats the gas moving in the gas pipeline inside box 1, when the pressure inside the gas conveying pipe is large, the flue gas entering the inside of elbow pipe 21 pushes piston block 26 in the two circular grooves 25 inside round block 22 to move towards round rod 27, so that one end of round rod 27 slides on the inner wall of L-shaped block 29 and compresses spring 28 on the outer surface of round rod 27, when piston block 26 moves to the farthest end of the inner wall of circular groove 25, through hole 24 is opened, so that the flue gas can pass through two circular grooves 25 at one end of elbow pipe 21 through through hole 24 into air channel 23, and then directly enters the inside of box 1 through elbow pipe 21 without participating in heat recycling and is output through the other end of conveying pipe 4 to relieve pressure, so as to avoid the structure of the connection between conveying pipe 4 and box 1 from deforming due to the excessive pressure inside conveying pipe 4, causing flue gas leakage, and the two springs 28 on the outer surfaces of two round rods 27 return to their original state after the pressure inside conveying pipe 4 becomes smaller, pushing two round rods 27 to move in the original direction, so that piston block 26 returns to the original position to close through hole 24.

[0030] Reference Figures 2-5As shown, in the embodiment: one end of the circular block 22 is fixedly connected with two cylinders 210, the two cylinders 210 are located outside the L-shaped block 29 and the spring 28, and the spring 28 is wrapped by the two cylinders 210, so that the normal use of the spring 28 can be avoided as much as possible under the influence of the high temperature of the spring 28. One end of the circular block 22 is fixedly connected with a sealing strip 211 made of rubber. By arranging the rubber sealing strip 211, the contact between the outer surface of the circular block 22 and the inner wall of the bent pipe 21 can be further sealed, so as to avoid the leakage of flue gas through the contact between the circular block 22 and the inner wall of the bent pipe 21 as much as possible.

[0031] Referring to Figures 2-5 As shown, in the embodiment: one end of the piston block 26 is provided with a groove 212, and the inner wall of the groove 212 is tapered. By arranging the tapered groove 212, the smoke gathered at one end of the circular block 22 is more easily pushed into the two piston blocks 26 to move the piston blocks 26.

[0032] Referring to Figures 1-3 As shown, in the embodiment: the box body 1 is provided with a supporting device 3 at both ends, the supporting device 3 comprises a slot rod 31, one end of the slot rod 31 is fixedly connected with one side of the box body 1, the inner wall of the slot rod 31 is slidably connected with a sliding rod 32, one end of the sliding rod 32 is fixedly connected with a supporting plate 33, one side of the sliding rod 32 is fixedly connected with a screw rod 34, the outer surface of the screw rod 34 is threadedly connected with a threaded ring 35. After the flue gas pipeline is connected with the conveying pipe 4 by using the recovery device, the sliding rod 32 can be pushed to slide on the inner wall of the slot rod 31 to adjust the horizontal position of the sliding rod 32 and the supporting plate 33, so that the supporting plate 33 is located below the conveying pipe 4 or the connection between the conveying pipe 4 and the flue gas pipeline. By rotating the threaded ring 35, the threaded ring 35 is moved on the outer surface of the screw rod 34 towards the slot rod 31, and one side of the threaded ring 35 is pressed against one side of the slot rod 31 to fix the position of the sliding rod 32. The supporting plate 33 supports the conveying pipe 4, and the structural stability of the connection between the conveying pipe 4 and the box body 1 is improved.

[0033] Referring to Figures 2-3As shown, in the embodiment: the outer surface of the threaded ring 35 is fixedly connected with a plurality of protrusions 36, the protrusions 36 are circumferentially distributed on the outer surface of the threaded ring 35, and the threaded ring 35 can be more conveniently rotated at the protrusions 36 on the outer surface of the threaded ring 35 and is not easy to slip, the end of the screw rod 34 away from the sliding rod 32 is fixedly connected with a stop block 37, the length of the stop block 37 is greater than the diameter of the screw rod 34, the movement range of the threaded ring 35 on the outer surface of the screw rod 34 can be limited by arranging the stop block 37, so that the threaded ring 35 cannot fall off the outer surface of the screw rod 34 when the threaded ring 35 is rotated outward, and the top end of the sliding rod 32 is fixedly connected with a support rod 38, one end of the support rod 38 away from the sliding rod 32 is fixedly connected with the bottom end of the supporting plate 33, the lower part of the supporting plate 33 can be further supported by arranging the support rod 38, and the stability of the connecting structure of the sliding rod 32 and the supporting plate 33 is improved.

[0034] Working principle: the waste gas heat accumulation and oxidation utilization project first needs to improve the methane concentration in the waste gas, and the commonly used method is to uniformly mix the low-concentration gas and the waste gas, so as to improve the methane concentration of the waste gas; the mixed gas is sent into the preheated heat accumulation and oxidation furnace through the pipeline for oxidation reaction and heat release, heat is generated in the heat accumulation and oxidation of the gas, one end of the gas conveying pipeline is connected with the flue gas outlet end of the gas heat accumulation device, the gas conveying pipeline is connected with the gas pipe at the top end and the outer side of the box 1, the sliding rod 32 is slidably adjusted on the inner wall of the groove rod 31 to adjust the horizontal position of the sliding rod 32 and the supporting plate 33, so that the supporting plate 33 is located below the conveying pipe 4 or the connection between the conveying pipe 4 and the flue gas pipeline, the threaded ring 35 is rotated to move the threaded ring 35 on the outer surface of the screw rod 34 in the direction of the groove rod 31, one side of the threaded ring 35 is pressed against one side of the groove rod 31 to fix the position of the sliding rod 32, the supporting plate 33 supports the conveying pipe 4, the flue gas enters the inside of the box 1 through the gas conveying pipe and heats the gas moving in the gas pipeline inside the box 1, when the pressure inside the gas conveying pipe is large, the flue gas entering the inside of the bent pipe 21 pushes the piston block 26 in the two circular grooves 25 inside the circular block 22 to move in the direction of the circular rod 27, so that the end of the circular rod 27 slides on the inner wall of the L-shaped block 29 and compresses the spring 28 on the outer surface of the circular rod 27, when the piston block 26 moves to the farthest end of the inner wall of the circular groove 25, the through hole 24 is opened, so that the flue gas can pass through the two circular grooves 25 at one end of the bent pipe 21, enter the air duct 23 through the through hole 24, and then directly enter the inside of the box 1 through the bent pipe 21 without participating in heat recovery and utilization, and is output through the conveying pipe 4 at the other end for pressure relief, so as to avoid the structure at the connection between the conveying pipe 4 and the box 1 from being deformed due to the excessive pressure in the conveying pipe 4, causing flue gas leakage, and the two springs 28 on the outer surfaces of the two circular rods 27 return to their original states to push the two circular rods 27 to move in the original direction, so that the piston block 26 returns to the original position to close the through hole 24.

[0035] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms. Any person skilled in the art can modify or change the above disclosed technical contents into equivalent embodiments applied to other fields, but any simple modification, equivalent change and alteration of the above embodiments without departing from the technical scheme of the present application, according to the technical essence of the present application, still belong to the protection scope of the present application. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection” and “connecting” should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of 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.

Claims

1. A device for recovering and utilizing high-temperature flue gas from a boiler after ultra-low concentration gas regenerative oxidation, comprising a housing (1), characterized in that: The two sides of the box (1) are fixedly connected to the conveying pipe (4), the top of the box (1) is provided with a gas inlet pipe, the bottom of the box (1) is fixedly connected with several support legs (5), a pressure relief device (2) is provided on one side of the conveying pipe (4), the pressure relief device (2) includes a bent pipe (21), the two ends of the bent pipe (21) are fixedly connected to one side of the conveying pipe (4) and one side of the box (1) respectively, a round block (22) is fixedly connected to the inner wall of the bent pipe (21), an air passage (23) is opened inside the round block (22), and two round grooves (25) are opened inside the round block (22). A through hole (24) is provided on one side, which passes through the circular groove (25) and the air passage (23). A piston block (26) is slidably connected to the inner wall of the circular groove (25). A circular rod (27) is fixedly connected to one end of the piston block (26). The outer surface of the circular rod (27) slides on the inner wall of the circular block (22). Two L-shaped blocks (29) are fixedly connected to one end of the circular block (22). The outer surface of the circular rod (27) slides on the inner wall of the L-shaped block (29). A spring (28) is provided on the outer surface of the circular rod (27). The two ends of the spring (28) are fixedly connected to one side of the circular rod (27) and one side of the L-shaped block (29), respectively.

2. The boiler high-temperature flue gas recovery and utilization device after ultra-low concentration gas regenerative oxidation according to claim 1, characterized in that: Two cylinders (210) are fixedly connected to one end of the circular block (22), and the two cylinders (210) are located outside the L-shaped block (29) and the spring (28).

3. The boiler high-temperature flue gas recovery and utilization device after ultra-low concentration gas regenerative oxidation according to claim 2, characterized in that: One end of the circular block (22) is fixedly connected to a sealing strip (211), which is made of rubber.

4. The boiler high-temperature flue gas recovery and utilization device after ultra-low concentration gas regenerative oxidation according to claim 3, characterized in that: The piston block (26) has a groove (212) at one end, and the inner wall of the groove (212) is conical.

5. The boiler high-temperature flue gas recovery and utilization device after ultra-low concentration gas regenerative oxidation according to claim 4, characterized in that: The box (1) is provided with support devices (3) at both ends. The support device (3) includes a groove rod (31). One end of the groove rod (31) is fixedly connected to one side of the box (1). A sliding rod (32) is slidably connected to the inner wall of the groove rod (31). A support plate (33) is fixedly connected to one end of the sliding rod (32). A screw (34) is fixedly connected to one side of the sliding rod (32). A threaded ring (35) is threadedly connected to the outer surface of the screw (34).

6. The boiler high-temperature flue gas recovery and utilization device after ultra-low concentration gas regenerative oxidation according to claim 5, characterized in that: The outer surface of the threaded ring (35) is fixedly connected with a number of protrusions (36), which are distributed circumferentially on the outer surface of the threaded ring (35).

7. The boiler high-temperature flue gas recovery and utilization device after ultra-low concentration gas regenerative oxidation according to claim 6, characterized in that: A stop (37) is fixedly connected to the end of the screw (34) away from the sliding rod (32), and the length of the stop (37) is greater than the diameter of the screw (34).

8. The boiler high-temperature flue gas recovery and utilization device after ultra-low concentration gas regenerative oxidation according to claim 6, characterized in that: A support rod (38) is fixedly connected to one side of the top of the sliding rod (32), and the end of the support rod (38) away from the sliding rod (32) is fixedly connected to the bottom end of the support plate (33).

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