Waste heat recovery processing device after VOC gas incineration

Abstract

The invention belongs to the technical field of VOC gas incineration treatment, and particularly relates to a VOC gas after-incineration waste heat recovery treatment device which comprises a pressurizing pipe, an incinerator, two heat exchangers and an air pressure power mechanism. A heat exchange pipe fitting is arranged in the heat exchanger, an air inlet assembly is installed between the input end of the heat exchange pipe fitting and the incinerator, and an air pressure power mechanism used for driving the heat exchange pipe fitting to rotate is installed at the output end of the heat exchange pipe fitting. The air pressure power mechanism comprises an air disc, a rotary sealing piece, a transmission mechanism, a first U-shaped tee joint and a second U-shaped tee joint, the input end of the first U-shaped tee joint communicates with the output end of the heat exchange pipe fitting, and the output end of the second U-shaped tee joint communicates with an exhaust assembly; the heat exchange efficiency of heat recovery after VOC gas incineration is effectively improved, the water temperature in the heat exchanger is not prone to large temperature difference through cooperation of the air pressure power mechanism and the heat exchange pipe fitting, the water drainage opportunity of the heat exchanger is conveniently and accurately judged, and the single-time heat recovery effect of the heat exchanger is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of VOC gas incineration treatment, and in particular relates to a waste heat recovery treatment device after VOC gas incineration. Background Art

[0002] VOC gas refers to volatile organic compounds. Due to its potential hazards in the environment, including adverse effects on human health and pollution to the atmospheric environment, VOC gas needs to be treated. VOC gas can come from various industrial processes, such as chemical production, spraying operations, printing and other industries. These compounds can form photochemical smog in the atmosphere, causing air quality to deteriorate and increasing the risk of respiratory and cardiovascular diseases. Generally speaking, most VOC gas treatment methods are incineration. VOC gas is completely oxidized into carbon dioxide and water at high temperatures, reducing pollution to the environment and protecting human health and the ecological environment. In addition, incineration treatment also has the characteristics of high treatment efficiency and simple operation. It is suitable for various types of VOC waste gas and is a reliable end-of-pipe treatment technology.

[0003] In the prior art, after the VOC gas is incinerated, a heat exchanger is usually used to recover the energy of the hot gas generated. However, after the water in the heat exchanger reaches a certain temperature, it needs to be discharged and replenished with cold water. This process takes time, resulting in the inability to recover the energy of the hot gas generated by the incineration during this period. In addition, the heat exchange tubes in the heat exchanger are mostly fixed structures, which makes it impossible to stir the water in the heat exchanger, and uneven temperature is prone to occur during the heat exchange process. When the temperature sensor is used to detect the water temperature, when it is detected that the temperature at a certain point meets the standard, the system will drain the water. However, due to the uneven temperature, the overall temperature of the water in the heat exchanger has not actually reached the emission standard, thereby affecting the single heat recovery effect of the heat exchanger. Summary of the invention

[0004] The purpose of the present invention is to provide a waste heat recovery device after VOC gas incineration, which solves the problems of low heat recovery efficiency in the VOC gas incineration process and poor single heat recovery effect of the heat exchanger in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A device for recovering and treating waste heat after incineration of VOC gas, comprising a booster pipe and an incinerator, wherein the booster pipe introduces VOC gas into the incinerator for incineration, and the VOC gas incineration recovery and treatment device further comprises: The heat exchanger is used to perform heat exchange treatment on the gas after the combustion of VOC gas. The heat exchanger includes two, each heat exchanger includes a heat exchanger shell, a heat exchange pipe is arranged in the heat exchanger shell, and the space between the inside of the heat exchanger shell and the heat exchange pipe is filled with water. In addition, the input end of the heat exchange pipe is connected to the incinerator through an air intake assembly, and the output end of the heat exchange pipe is installed with a pneumatic power mechanism for driving the heat exchange pipe to rotate, wherein: The heat exchange pipe fitting comprises a spiral pipe, wherein two ends of the spiral pipe are respectively connected to a front transverse pipe and a rear transverse pipe, and the centers of the front transverse pipe and the rear transverse pipe are respectively connected to an air inlet pipe and an air outlet pipe, and hot gas after combustion of VOC gas enters the heat exchange pipe fitting from the air inlet pipe, passes through the front transverse pipe, the spiral pipe and the rear transverse pipe in sequence, and is output from the air outlet pipe, wherein one end of the front transverse pipe and the rear transverse pipe is sealed; A pneumatic power mechanism, comprising a cylindrical gas disk, a first U-shaped tee and a second U-shaped tee are oppositely arranged on the circumferential side wall of the gas disk, wherein the single-port end of the first U-shaped tee is rotatably connected to the gas outlet pipe of the heat exchange pipe, and the double-port end of the first U-shaped tee is connected to the gas disk, the double-port end of the second U-shaped tee is also connected to the gas disk, and the double-port end of the second U-shaped tee is connected to the exhaust component, and the gas after heat exchange enters the gas disk through the first U-shaped tee and is output to the exhaust component through the second U-shaped tee; In addition, the pneumatic power mechanism also includes a rotating seal that is rotatably arranged inside the gas disk and is used to evenly divide the internal space of the gas disk into three air storage chambers, and a transmission mechanism that is arranged on the top of the gas disk and fixedly connected to the rotating seal. The output end of the transmission mechanism is fixedly connected to the air outlet pipe of the heat exchange pipe. When the gas after heat exchange passes into the gas disk and under the condition that the first U-shaped tee, the second U-shaped tee and the three air storage chambers cooperate with each other, the rotating seal is rotated in the gas disk, and the transmission mechanism is used to transmit the rotational power of the rotating seal to the heat exchange pipe, thereby realizing the rotation of the heat exchange pipe in the heat exchanger shell.

[0006] Preferably, the air intake assembly includes a T-shaped pipe, one port of the T-shaped pipe is connected to the exhaust port of the incinerator, and the other two ports of the T-shaped pipe are respectively connected to two elbow pipes, the ends of the two elbow pipes are respectively connected to the air intake pipes of the heat exchange pipe fittings in the two heat exchangers, and the two elbow pipes are respectively provided with a first valve and a second valve.

[0007] More preferably, in each heat exchanger, the heat exchange pipe further comprises a plurality of outer paddles and inner paddles, and the plurality of outer paddles and inner paddles are evenly distributed along the spiral direction of the spiral tube, and in addition, the outer paddles and inner paddles are internally hollow structures and are both connected to the spiral tube; On this basis, the air inlet pipe and the air outlet pipe are both arranged coaxially with the spiral pipe and the heat exchanger shell, so that the air outlet pipe can drive the entire heat exchange pipe to rotate in the heat exchanger shell when rotating.

[0008] Preferably, in each of the heat exchangers, a water inlet pipe with a first control valve is installed on the top of the heat exchanger shell, a water outlet pipe with a second control valve is installed on the bottom of the heat exchanger shell, and a liquid level sensor for detecting the water level and a temperature sensor for detecting the water temperature are also provided in the heat exchanger shell.

[0009] Furthermore, in each of the heat exchangers, the air inlet pipe and the air outlet pipe respectively pass through the center of the two ends of the heat exchanger shell, and the air inlet pipe and the air outlet pipe are rotatably connected to the two ends of the heat exchanger shell through a first sealing bearing, respectively. In addition, the air inlet pipe is rotatably connected to the elbow pipe through a second sealing bearing, and the air outlet pipe is rotatably connected to the single-port end of the first U-shaped tee through a third sealing bearing.

[0010] Furthermore, in the pneumatic power mechanism, the rotating seal includes a rotating shaft coaxially arranged inside the air disk, the bottom end of the rotating shaft is rotatably connected to the air disk through a rotating damping shaft, and a first dial plate, a second dial plate and a third dial plate are equidistantly distributed on the circumferential side wall of the rotating shaft, and the rotating shaft drives the first dial plate, the second dial plate and the third dial plate to rotate in line with the inner wall of the air disk. On this basis, the rotating seal divides the space inside the air disk into three unconnected air storage chambers through the first dial plate, the second dial plate and the third dial plate.

[0011] Preferably, in the pneumatic power mechanism, the three air storage chambers are respectively configured as a first cavity, a second cavity and a third cavity, and the two ports of the first U-shaped three-way double-port end are respectively connected to the first cavity and the third cavity.

[0012] Preferably, in the pneumatic power mechanism, a first stopper and a second stopper are installed on the inner wall of the gas disk, the first stopper and the second stopper are located in the second cavity, and the first stopper and the second stopper are used to limit the rotation stroke of the second shift plate and the third shift plate respectively; When the first stopper is in contact with the second pull plate, the first port in the double-port end of the first U-shaped tee and the third port in the double-port end of the second U-shaped tee are both located in the first cavity. At this time, the second port in the double-port end of the first U-shaped tee is located in the third cavity, and the fourth port in the double-port end of the second U-shaped tee is located in the second cavity. When the second stopper is in contact with the third shift plate, the second port in the double-port end of the first U-shaped tee and the fourth port in the double-port end of the second U-shaped tee are both located in the third cavity. At this time, the first port in the double-port end of the first U-shaped tee is located in the first cavity, and the third port in the double-port end of the second U-shaped tee is located in the second cavity.

[0013] Further, in the pneumatic power mechanism, the transmission mechanism includes a toothed disc, the toothed disc is coaxially fixedly connected to the top of the rotating shaft through a pin shaft, and a seal is installed at the rotation connection between the pin shaft and the top of the air disc. In addition, a second gear is meshedly connected to one side of the toothed disc, the second gear is rotatably installed on the top of the air disc, and a screw rod is coaxially fixedly installed on the second gear; The transmission mechanism also includes an L-shaped connecting column and an L-shaped limiting column, wherein the L-shaped connecting column is composed of an integrally arranged first horizontal portion and a first vertical portion, one end of the first horizontal portion is threadedly sleeved on the screw rod; the L-shaped limiting column is composed of an integrally arranged second horizontal portion and a second vertical portion, the second vertical portion is slidably sleeved in the first horizontal portion, and one end of the second horizontal portion is fixedly arranged on the heat exchanger shell; in addition, a rack is provided on one side of the first vertical portion, the rack is meshingly connected with a first gear, and the first gear is fixedly sleeved on the outer tube wall of the outlet pipe.

[0014] Furthermore, the exhaust assembly includes a U-shaped tube, both ends of which are respectively connected to the single-port ends of the two second U-shaped tees, the middle of the U-shaped tube is also connected to an exhaust pipe, and the U-shaped tube is also symmetrically provided with two one-way valves for unidirectionally outputting the gas output by the two second U-shaped tees to the exhaust pipe.

[0015] The beneficial effects of the present invention are: Under the premise of using an incinerator to incinerate VOC gas, the present invention introduces hot gas such as carbon dioxide generated by the incineration into the heat exchange pipe fittings in the heat exchanger through the air intake assembly, utilizes the contact between the heat exchange pipe fittings and water to exchange the heat of the hot gas into the water, and utilizes the water after the heat exchange to avoid ineffective heat loss. In addition, in order to improve the heat exchange efficiency of the heat exchanger, the gas after the heat exchange is introduced into the gas disk, and the pressure in each gas storage cavity in the gas disk is changed by the gas to generate a pressure difference, so that the rotating seal generates a source power for intermittent reciprocating rotation, and then the source power is transmitted to the heat exchange pipe fittings by the transmission mechanism, so as to realize the intermittent reciprocating rotation of the heat exchange pipe fittings, thereby realizing the stirring of the water in the heat exchanger shell by the heat exchange pipe fittings, improving the heat exchange efficiency while preventing a large temperature difference in the water temperature at various locations in the heat exchanger shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the connection structure between the heat exchange pipe and the heat exchanger shell in the present invention; Figure 3 It is a schematic diagram of the specific structure of the heat exchange pipe in the present invention; Figure 4 is a schematic diagram of the specific structure of the air intake assembly in the present invention; Figure 5 It is a schematic diagram of the connection structure between the gas disk and the exhaust assembly in the present invention; Figure 6 It is a schematic diagram of the initial state of the connection between the rotating seal and the gas disk in the present invention; Figure 7 It is a schematic diagram of a second state in which the rotary seal is connected to the gas disk in the present invention; Figure 8 It is a partial structural schematic diagram of the pneumatic power mechanism in the present invention; In the figure: booster pipe 1; incinerator 2; heat exchanger 3, heat exchanger shell 301, water inlet pipe 302, water outlet pipe 303; pneumatic power mechanism 4, gas disc 401, rotating seal 402, transmission mechanism 403, rotating shaft 404, first dial plate 405, second dial plate 406, third dial plate 407, first cavity 408, second cavity 409, third cavity 410, first stopper 411, second stopper 412, toothed disc 413, second gear 414, screw rod 415, first horizontal portion 416, first Vertical portion 417, second horizontal portion 418, second vertical portion 419, rack 420, first gear 421; heat exchange pipe 5, spiral tube 501, front cross pipe 502, rear cross pipe 503, air inlet pipe 504, air outlet pipe 505, outer paddle 506, inner paddle 507; air inlet assembly 6, T-shaped pipe 601, elbow pipe 602, first valve 603, second valve 604; first U-shaped tee 7; second U-shaped tee 8; exhaust assembly 9, U-shaped pipe 901, exhaust pipe 902, one-way valve 903. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The technical solution of the present application will be described in detail below with reference to the accompanying drawings.

[0021] In this technical solution, if Figure 1 As shown, a waste heat recovery and processing device after VOC gas incineration includes a booster pipe 1 and an incinerator 2. The booster pipe 1 introduces the VOC gas into the incinerator 2 for incineration. The device provided in this application is used to recover heat from the gas generated after the VOC gas is incinerated. The waste heat recovery and processing device also includes: a heat exchanger 3 and a pneumatic power mechanism 4.

[0022] like Figure 2 As shown, the heat exchanger 3 is used to perform heat exchange treatment on the gas generated after the combustion of VOC gas. The heat exchanger 3 includes two, each heat exchanger 3 includes a heat exchanger shell 301, and a heat exchange pipe 5 is arranged in the heat exchanger shell 301. The space between the inside of the heat exchanger shell 301 and the heat exchange pipe 5 is filled with water. That is, the waste heat recovery described in this embodiment refers to supplying heat to the filled cold water with the hot gas generated after combustion to avoid ineffective heat loss, wherein the input end of the heat exchange pipe 5 is connected to the incinerator 2 through the air intake assembly 6.

[0023] Specifically, Figure 3As shown, the heat exchange pipe fitting 5 includes a spiral tube 501, and the two ends of the spiral tube 501 are respectively connected to the front cross tube 502 and the rear cross tube 503, and the centers of the front cross tube 502 and the rear cross tube 503 are respectively connected to the air inlet pipe 504 and the air outlet pipe 505. In addition, in each heat exchanger 3, the heat exchange pipe fitting 5 also includes a plurality of outer paddles 506 and inner paddles 507, and the plurality of outer paddles 506 and inner paddles 507 are respectively evenly distributed along the spiral direction of the spiral tube 501, and the outer paddles 506 and the inner paddles 507 are internal hollow structures and are both connected to the spiral tube 501.

[0024] Based on the above embodiment, after the VOC gas is burned, the gas enters the heat exchange pipe 5 from the air inlet pipe 504, passes through the front cross pipe 502, the spiral tube 501 and the rear cross pipe 503 in sequence, and is output from the air outlet pipe 505, wherein one end of the front cross pipe 502 and the rear cross pipe 503 are sealed.

[0025] The hot air introduced into the heat exchange pipe 5 is transferred from the incinerator 2 to the heat exchange pipe 5 by the air inlet assembly 6. Figure 4 As shown, the air intake assembly 6 includes a T-shaped tube 601, one end of the T-shaped tube 601 is connected to the exhaust port of the incinerator 2, and the other two ends of the T-shaped tube 601 are respectively connected to two elbow tubes 602, the ends of the two elbow tubes 602 are respectively connected to the air intake pipes 504 of the heat exchange pipe fittings 5 ​​in the two heat exchangers 3, and the two elbow tubes 602 are respectively provided with a first valve 603 and a second valve 604.

[0026] Based on the above embodiment, by opening the first valve 603 or the second valve 604 and keeping the other valve closed, one of the two heat exchangers 3 can be put into heat recovery work, and when the heat exchanger 3 corresponding to the first valve 603 needs to be drained, the first valve 603 is closed and the second valve 604 is opened, so that the other heat exchanger 3 can be put into operation immediately, so that the waste heat recovery treatment device will not be unable to recover heat due to the heat exchanger 3 being in the drainage or water replenishment gap, which is beneficial to improve the heat recovery utilization rate.

[0027] In the present technical solution, the output end of the heat exchange pipe 5 is installed with a pneumatic power mechanism 4 for driving the heat exchange pipe 5 to rotate, and is used to stir the water in the heat exchanger shell 301 by using the outer paddle 506 and the inner paddle 507, so that the water temperature at various locations in the heat exchanger shell 301 will not produce a large temperature difference, which is conducive to accurately determining the drainage timing of the heat exchanger 3, and will not cause premature drainage due to high water temperature in some parts, thereby improving the heat recovery effect. Specifically, for the water inlet and drainage working conditions of the heat exchanger 3, the present application installs a water inlet pipe 302 with a first control valve on the top of the heat exchanger shell 301, A water outlet pipe 303 with a second control valve is installed at the bottom of the heat exchanger shell 301. A liquid level sensor for detecting the water level and a temperature sensor for detecting the water temperature are also arranged in the heat exchanger shell 301. The liquid level sensor and the temperature sensor are electrically connected to the external controller. When the temperature sensor detects that the water temperature reaches the discharge standard, the controller can be used to control the water outlet pipe 303 to open the drainage. When the liquid level sensor detects that the liquid level is lower than the set value, the controller controls the water outlet pipe 303 to close and open the water inlet pipe 302 to facilitate automatic replenishment of cold water until the liquid level sensor detects that the liquid level reaches the set value and stops.

[0028] As for the specific structure of the pneumatic power mechanism 4, Figure 5-8 As shown, the pneumatic power mechanism 4 includes a cylindrical gas disk 401, and a first U-shaped tee 7 and a second U-shaped tee 8 are oppositely arranged on the circumferential side wall of the gas disk 401, wherein the single-port end of the first U-shaped tee 7 is rotatably connected to the outlet pipe 505 of the heat exchange pipe 5, and the double-port end of the first U-shaped tee 7 is connected to the gas disk 401; the double-port end of the second U-shaped tee 8 is also connected to the gas disk 401, and the single-port end of the second U-shaped tee 8 is connected to the exhaust component 9. After the heat exchange, the gas enters the gas disk 401 through the first U-shaped tee 7, and is output to the exhaust component 9 through the second U-shaped tee 8.

[0029] In addition, the pneumatic power mechanism 4 also includes a rotating seal 402 rotatably arranged inside the gas disk 401 and used to evenly divide the internal space of the gas disk 401 into three gas storage chambers, and a transmission mechanism 403 arranged on the top of the gas disk 401 and fixedly connected to the rotating seal 402. The output end of the transmission mechanism 403 is fixedly connected to the outlet pipe 505 of the heat exchange pipe 5. When the gas after heat exchange is passed into the gas disk 401, and under the condition that the first U-shaped tee 7, the second U-shaped tee 8 and the three gas storage chambers cooperate with each other, the rotating seal 402 is rotated in the gas disk 401, and the transmission mechanism 403 is used to transmit the rotational power of the rotating seal 402 to the heat exchange pipe 5, so as to realize the rotation of the heat exchange pipe 5 in the heat exchanger shell 301.

[0030] Specifically, Figure 6-7As shown, the rotating seal 402 includes a rotating shaft 404 coaxially arranged inside the gas disk 401, and the bottom end of the rotating shaft 404 is rotatably connected to the gas disk 401 through a rotating damping shaft, and a first dial plate 405, a second dial plate 406 and a third dial plate 407 are equidistantly distributed on the circumferential side wall of the rotating shaft 404. The rotating shaft 404 drives the first dial plate 405, the second dial plate 406 and the third dial plate 407 to rotate in contact with the inner wall of the gas disk 401. On this basis, the rotating seal 402 divides the space inside the gas disk 401 into three unconnected gas storage chambers through the first dial plate 405, the second dial plate 406 and the third dial plate 407.

[0031] For the convenience of description, in this embodiment, the three air storage chambers are respectively configured as the first cavity 408, the second cavity 409 and the third cavity 410, and the space between the first dial plate 405 and the second dial plate 406 is the first cavity 408, the space between the second dial plate 406 and the third dial plate 407 is the second cavity 409, and the space between the third dial plate 407 and the first dial plate 405 is the third cavity 410. Based on the above structure, the two ports of the double-mouth end of the first U-shaped tee 7 are respectively connected to the first cavity 408 and the third cavity 410.

[0032] In addition, Figure 6-7 As shown, a first stopper 411 and a second stopper 412 are installed on the inner wall of the gas disk 401 , the first stopper 411 and the second stopper 412 are located in the second cavity 409 , and the first stopper 411 and the second stopper 412 are used to limit the rotation stroke of the second dial plate 406 and the third dial plate 407 , respectively.

[0033] Based on the above embodiments Figure 6-7 As an example, under the premise that the incinerator 2 is performing VOC gas incineration, when the position of the rotating seal 402 in the gas disk 401 is as follows Figure 6 The state shown is the initial state, at which time the first stopper 411 is in contact with the second selector plate 406, and the first port 701 in the double-mouth end of the first U-shaped tee 7 and the third port 801 in the double-mouth end of the second U-shaped tee 8 are both located in the first cavity 408; the second port 702 in the double-mouth end of the first U-shaped tee 7 is located in the third cavity 410, and the fourth port 802 in the double-mouth end of the second U-shaped tee 8 is located in the second cavity 409.

[0034] At this time, the gas in the first cavity 408 can be discharged normally, while the gas in the third cavity 410 cannot be discharged, resulting in the internal pressure of the third cavity 410 increasing continuously, thereby pushing the third dial plate 407 to drive the rotating shaft 404 to rotate counterclockwise to the position as shown in FIG. Figure 7In the state shown, the second stopper 412 is in contact with the third shift plate 407, and the second port 702 in the double-mouth end of the first U-shaped tee 7 and the fourth port 802 in the double-mouth end of the second U-shaped tee 8 are both located in the third cavity 410; the first port 701 in the double-mouth end of the first U-shaped tee 7 is located in the first cavity 408, and the third port 801 in the double-mouth end of the second U-shaped tee 8 is located in the second cavity 409, so the third cavity 410 can be exhausted normally, while the air pressure in the first cavity 408 increases due to the inability to exhaust, thereby pushing the second shift plate 406 to drive the rotating shaft 404 to rotate clockwise and return to the state shown in FIG. Figure 6 Status shown.

[0035] At this point, under the premise that the incinerator 2 carries out VOC gas incineration treatment, the rotating seal 402 intermittently reciprocates due to the pressure difference generated by the alternating discharge of gases in the first cavity 408 and the third cavity 410, thereby generating a source of power; and the setting of the rotary damping shaft makes the rotation process of the rotating shaft 404 have a certain resistance, thereby improving the stability of the position of the rotating seal 402 in the gas disk 401, and the first stop block 411 can be used to limit the clockwise rotation stroke of the second dial plate 406, and the second stop block 412 can be used to limit the counterclockwise rotation stroke of the third dial plate 407, so that the first U-shaped tee 7 is always connected with the first cavity 408 and the third cavity 410.

[0036] In this technical solution, the source power generated by the rotating seal 402 is transmitted to the heat exchange pipe 5 through the transmission mechanism 403, so as to realize the intermittent reciprocating rotation of the heat exchange pipe 5. Specifically, Figure 8 As shown, the transmission mechanism 403 includes a toothed disc 413, which is coaxially fixedly connected to the top of the rotating shaft 404 through a pin, and a seal is installed at the rotating connection between the pin and the top of the air disc 401. In addition, one side of the toothed disc 413 is meshingly connected with a second gear 414, and the second gear 414 is rotatably installed on the top of the air disc 401. A screw rod 415 is also coaxially fixedly installed on the second gear 414.

[0037] In addition, the transmission mechanism 403 also includes an L-shaped connecting column and an L-shaped limiting column, wherein the L-shaped connecting column is composed of an integrally arranged first horizontal portion 416 and a first vertical portion 417, and one end of the first horizontal portion 416 is threadedly sleeved on the screw rod 415; the L-shaped limiting column is composed of an integrally arranged second horizontal portion 418 and a second vertical portion 419, and the second vertical portion 419 is slidably sleeved in the first horizontal portion 416, and one end of the second horizontal portion 418 is fixedly arranged on the heat exchanger shell 301; on this basis, a rack 420 is provided on one side of the first vertical portion 417, and the rack 420 is meshingly connected with a first gear 421, and the first gear 421 is fixedly sleeved on the outer tube wall of the outlet pipe 505.

[0038] Based on the above embodiment, when the rotating seal 402 rotates, it drives the toothed disc 413 to rotate, and then drives the screw rod 415 connected to the second gear 414 to rotate, so that the L-shaped connecting column whose rotation freedom is limited by the L-shaped limiting column can be lifted and lowered, and the L-shaped connecting column drives the rack 420 to rise and fall synchronously, thereby driving the air outlet pipe 505 fixedly mounted on the first gear 421 to rotate reciprocatingly, thereby realizing the stirring of the water in the heat exchanger shell 301 by the heat exchange pipe 5, improving the heat exchange efficiency while preventing a large temperature difference in the water temperature at various locations in the heat exchanger shell 301.

[0039] Based on the reciprocating rotation of the heat exchange pipe 5 in the heat exchanger shell 301, the present application also makes adaptive settings for the waste heat recovery and processing device after the incineration of VOC gas. Specifically, the air inlet pipe 504 and the air outlet pipe 505 in the present application are arranged coaxially with the spiral tube 501 and the heat exchanger shell 301, so that the air outlet pipe 505 can drive the entire heat exchange pipe 5 to rotate in the heat exchanger shell 301 when it rotates; and on the basis that the air inlet pipe 504 and the air outlet pipe 505 respectively pass through the centers of the two ends of the heat exchanger shell 301, the air inlet pipe 504 and the air outlet pipe 505 are respectively rotatably connected to the two ends of the heat exchanger shell 301 through the first sealing bearing. In addition, the air inlet pipe 504 is rotatably connected to the elbow pipe 602 through the second sealing bearing, and the air outlet pipe 505 is rotatably connected to the single-mouth end of the first U-shaped tee 7 through the third sealing bearing.

[0040] In this technical solution, the gas after heat exchange passes through the second U-shaped tee 8 and is discharged from the exhaust component 9. Figure 5 As shown, the exhaust assembly 9 includes a U-shaped tube 901, the two ends of the U-shaped tube 901 are respectively connected to the single-port ends of the two second U-shaped tees 8, and the middle of the U-shaped tube 901 is also connected to an exhaust pipe 902, and the U-shaped tube 901 is also symmetrically provided with two one-way valves 903 with respect to the exhaust pipe 902, which are used to output the gas output by the two second U-shaped tees 8 to the exhaust pipe 902 in a one-way manner.

[0041] Based on the above embodiment, since the product after the incineration of VOC gas is mainly carbon dioxide, in order to reduce the greenhouse effect, the exhaust pipe 902 can be introduced into a sodium hydroxide solution for absorption, but is not limited to a sodium hydroxide solution. The setting of the one-way valve 903 facilitates the smooth discharge of the gas after heat exchange through the exhaust pipe 902.

[0042] In order to facilitate those skilled in the art to understand the embodiments of the present invention, the working principle of the present invention is briefly described in combination with specific application scenarios: When the VOC gas is incinerated and the product waste heat is recovered by using the VOC gas incineration waste heat recovery treatment device provided by the present invention, the VOC gas to be incinerated is introduced into the incinerator 2 through the booster pipe 1 for incineration, and the gas generated after incineration is passed through the air intake component 6 into the heat exchange pipe 5 in the heat exchanger 3 for heat exchange, and then the gas after heat exchange is discharged by the exhaust component 9.

[0043] In order to improve the heat exchange efficiency of the heat exchanger 3, the gas after heat exchange is introduced into the gas disk 401, and the pressure difference is generated by the gas changing the pressure in each gas storage chamber in the gas disk 401, so that the rotating seal 402 generates a source power for intermittent reciprocating rotation, and then the transmission mechanism 403 is used to transmit the source power to the heat exchange pipe 5, so as to realize the intermittent reciprocating rotation of the heat exchange pipe 5, and then realize the stirring of the water in the heat exchanger shell 301 by the heat exchange pipe 5, thereby improving the heat exchange efficiency and preventing a large temperature difference in the water temperature at various locations in the heat exchanger shell 301.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat recovery and processing device after VOC gas incineration, comprising a booster pipe and an incinerator, wherein the booster pipe guides the VOC gas into the incinerator for incineration, characterized in that: The VOC gas incineration recovery and treatment device further comprises: The heat exchanger is used to perform heat exchange treatment on the gas after the combustion of VOC gas. The heat exchanger includes two, each heat exchanger includes a heat exchanger shell, a heat exchange pipe is arranged in the heat exchanger shell, and the space between the inside of the heat exchanger shell and the heat exchange pipe is filled with water. In addition, the input end of the heat exchange pipe is connected to the incinerator through an air intake assembly, and the output end of the heat exchange pipe is installed with a pneumatic power mechanism for driving the heat exchange pipe to rotate, wherein: The heat exchange pipe fitting comprises a spiral pipe, wherein two ends of the spiral pipe are respectively connected to a front transverse pipe and a rear transverse pipe, and the centers of the front transverse pipe and the rear transverse pipe are respectively connected to an air inlet pipe and an air outlet pipe, and hot gas after combustion of VOC gas enters the heat exchange pipe fitting from the air inlet pipe, passes through the front transverse pipe, the spiral pipe and the rear transverse pipe in sequence, and is output from the air outlet pipe, wherein one end of the front transverse pipe and the rear transverse pipe is sealed; A pneumatic power mechanism, comprising a cylindrical gas disk, a first U-shaped tee and a second U-shaped tee are oppositely arranged on the circumferential side wall of the gas disk, wherein the single-port end of the first U-shaped tee is rotatably connected to the gas outlet pipe of the heat exchange pipe, and the double-port end of the first U-shaped tee is connected to the gas disk, the double-port end of the second U-shaped tee is also connected to the gas disk, and the double-port end of the second U-shaped tee is connected to the exhaust component, and the gas after heat exchange enters the gas disk through the first U-shaped tee and is output to the exhaust component through the second U-shaped tee; In addition, the pneumatic power mechanism also includes a rotating seal that is rotatably arranged inside the gas disk and is used to evenly divide the internal space of the gas disk into three air storage chambers, and a transmission mechanism that is arranged on the top of the gas disk and fixedly connected to the rotating seal. The output end of the transmission mechanism is fixedly connected to the air outlet pipe of the heat exchange pipe. When the gas after heat exchange passes into the gas disk and under the condition that the first U-shaped tee, the second U-shaped tee and the three air storage chambers cooperate with each other, the rotating seal is rotated in the gas disk, and the transmission mechanism is used to transmit the rotational power of the rotating seal to the heat exchange pipe, thereby realizing the rotation of the heat exchange pipe in the heat exchanger shell.

2. The device for recovering waste heat from VOC gas incineration according to claim 1, characterized in that: The air intake assembly includes a T-shaped pipe, one port of the T-shaped pipe is connected to the exhaust port of the incinerator, and the other two ports of the T-shaped pipe are respectively connected to two elbow pipes, the ends of the two elbow pipes are respectively connected to the air intake pipes of the heat exchange pipe fittings in the two heat exchangers, and the two elbow pipes are respectively provided with a first valve and a second valve.

3. The device for recovering waste heat from VOC gas incineration according to claim 2, characterized in that: In each heat exchanger, the heat exchange pipe fitting further includes a plurality of outer paddles and inner paddles, and the plurality of outer paddles and inner paddles are evenly distributed along the spiral direction of the spiral tube, and in addition, the outer paddles and inner paddles are internally hollow structures and are both connected to the spiral tube; On this basis, the air inlet pipe and the air outlet pipe are both arranged coaxially with the spiral pipe and the heat exchanger shell, so that the air outlet pipe can drive the entire heat exchange pipe to rotate in the heat exchanger shell when rotating.

4. The device for recovering waste heat from VOC gas incineration according to claim 3 is characterized in that: In each of the heat exchangers, a water inlet pipe with a first control valve is installed on the top of the heat exchanger shell, and a water outlet pipe with a second control valve is installed on the bottom of the heat exchanger shell. A liquid level sensor for detecting the water level and a temperature sensor for detecting the water temperature are also arranged in the heat exchanger shell.

5. The device for recovering waste heat after incineration of VOC gas according to claim 4, characterized in that: In each of the heat exchangers, the air inlet pipe and the air outlet pipe respectively pass through the center of the two ends of the heat exchanger shell, and the air inlet pipe and the air outlet pipe are rotatably connected to the two ends of the heat exchanger shell through the first sealing bearing respectively. In addition, the air inlet pipe is rotatably connected to the elbow pipe through the second sealing bearing, and the air outlet pipe is rotatably connected to the single-port end of the first U-shaped tee through the third sealing bearing.

6. The device for recovering waste heat from VOC gas incineration according to claim 1, characterized in that: In the pneumatic power mechanism, the rotating seal includes a rotating shaft coaxially arranged inside the air disk, the bottom end of the rotating shaft is rotatably connected to the air disk through a rotating damping shaft, and a first dial plate, a second dial plate and a third dial plate are equidistantly distributed on the circumferential side wall of the rotating shaft. The rotating shaft drives the first dial plate, the second dial plate and the third dial plate to rotate in line with the inner wall of the air disk. On this basis, the rotating seal divides the space inside the air disk into three unconnected air storage chambers through the first dial plate, the second dial plate and the third dial plate.

7. The device for recovering waste heat from VOC gas incineration according to claim 6, characterized in that: In the pneumatic power mechanism, the three air storage chambers are respectively configured as a first cavity, a second cavity and a third cavity, and the two ports of the first U-shaped three-way double-port end are respectively connected to the first cavity and the third cavity.

8. The device for recovering waste heat from VOC gas incineration according to claim 7, characterized in that: In the pneumatic power mechanism, a first stopper and a second stopper are installed on the inner wall of the gas disk, the first stopper and the second stopper are located in the second cavity, and the first stopper and the second stopper are used to limit the rotation stroke of the second shift plate and the third shift plate respectively; When the first stopper is in contact with the second pull plate, the first port in the double-port end of the first U-shaped tee and the third port in the double-port end of the second U-shaped tee are both located in the first cavity. At this time, the second port in the double-port end of the first U-shaped tee is located in the third cavity, and the fourth port in the double-port end of the second U-shaped tee is located in the second cavity. When the second stopper is in contact with the third shift plate, the second port in the double-port end of the first U-shaped tee and the fourth port in the double-port end of the second U-shaped tee are both located in the third cavity. At this time, the first port in the double-port end of the first U-shaped tee is located in the first cavity, and the third port in the double-port end of the second U-shaped tee is located in the second cavity.

9. The device for recovering waste heat from VOC gas incineration according to claim 8, characterized in that: In the pneumatic power mechanism, the transmission mechanism includes a toothed disc, which is coaxially fixedly connected to the top of the rotating shaft through a pin shaft, and a seal is installed at the rotation connection between the pin shaft and the top of the air disc. In addition, a second gear is meshedly connected to one side of the toothed disc, and the second gear is rotatably installed on the top of the air disc. A screw rod is also coaxially fixedly installed on the second gear; The transmission mechanism also includes an L-shaped connecting column and an L-shaped limiting column, wherein the L-shaped connecting column is composed of an integrally arranged first horizontal portion and a first vertical portion, one end of the first horizontal portion is threadedly sleeved on the screw rod; the L-shaped limiting column is composed of an integrally arranged second horizontal portion and a second vertical portion, the second vertical portion is slidably sleeved in the first horizontal portion, and one end of the second horizontal portion is fixedly arranged on the heat exchanger shell; in addition, a rack is provided on one side of the first vertical portion, the rack is meshingly connected with a first gear, and the first gear is fixedly sleeved on the outer tube wall of the outlet pipe.

10. The device for recovering waste heat after incineration of VOC gas according to claim 9, characterized in that: The exhaust assembly includes a U-shaped tube, both ends of which are respectively connected to the single-port ends of the two second U-shaped tees, and the middle of the U-shaped tube is also connected to an exhaust pipe, and the U-shaped tube is also symmetrically provided with two one-way valves for unidirectionally outputting the gas output by the two second U-shaped tees to the exhaust pipe.

Images