High-temperature flue gas quenching type waste heat boiler

Abstract

The utility model provides a high-temperature flue gas quenching type waste heat boiler which comprises a main flue gas inlet pipe, a main flue gas outlet pipe and a boiler body fixedly arranged between the main flue gas inlet pipe and the main flue gas outlet pipe, and the input end and the output end of the boiler body are connected and communicated with the main flue gas inlet pipe and the main flue gas outlet pipe respectively. A plurality of dry ice descaling devices are further fixedly arranged on the main smoke outlet pipe, and the dry ice descaling devices and the boiler body are located on the same axis. The boiler body comprises a bundling sleeve, an upper pipe header and a lower pipe header, the upper pipe header and the lower pipe header are fixedly arranged at the two ends of the bundling sleeve respectively, the upper pipe header and the lower pipe header are communicated with an internal gap of the bundling sleeve, and an inlet section and an outlet section which are communicated with the main smoke inlet pipe and the main smoke outlet pipe respectively are fixedly arranged at the two ends of the bundling sleeve. According to the utility model, through the bundling sleeve arranged in the boiler body, high-temperature flue gas and cooling water are positioned in different areas in the bundling sleeve and complete heat exchange, so that flue gas waste heat of the high-temperature flue gas is effectively recovered, and the mixing condition of the cooling water and the flue gas is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy -conserving and environment -friendly equipment technical field especially relates to a high temperature flue gas quenching type waste heat boiler. BACKGROUND

[0002] The current widely used electric furnace flue gas purification treatment process is: the high temperature flue gas of electric furnace is preheated after the scrap steel preheating channel, and the outlet temperature is 800~1000 DEG C, and is directly into the water spraying evaporation quenching tower after the connecting flue and the combustion settling chamber, and the temperature of the flue gas is reduced to 250 DEG C or less, and the flue gas is mixed with the flue gas from the electric furnace closed cover, and then enters the bag filter, and is filtered and purified, and then is discharged into the atmosphere through the fan and the chimney. The core point of the process technology is: the high temperature flue gas is rapidly quenched by a large amount of water, so that the rapid synthesis temperature range of dioxin (i.e. 250~450 DEG C temperature range) is avoided. The main deficiencies of the process technology are as follows:

[0003] ①The waste heat of the flue gas of 800~250 DEG C cannot be effectively recovered, resulting in waste of the heat of the electric furnace flue gas;

[0004] ②A large amount of water is needed for cooling, and the cooling water is wasted;

[0005] ③It is impossible to completely avoid the synthesis of dioxin, and the de novo synthesis of dioxin still occurs in the subsequent cooling process;

[0006] ④In addition, the dioxin in the electric furnace dust is collected by using "carrying flow type jet active carbon powder as adsorbent", so that the electric furnace dust contains a large amount of dioxin, and the electric furnace dust needs to be treated as hazardous waste, resulting in waste of resources;

[0007] ⑤The cooling water becomes water vapor in the cooling process, which is mixed into the flue gas, significantly increasing the flue gas flow;On the one hand, the water in the flue gas is easy to cause the bag filter to be pasted, and on the other hand, the large flue gas flow also increases the load of the fan, and also causes the "smoke plume" problem. SUMMARY

[0008] The utility model solves the technical problems of overcoming the defects of the prior art, and provides a high temperature flue gas quenching type waste heat boiler, which effectively recovers the waste heat of the flue gas of 800-250 DEG C, avoids the mixing of cooling water and flue gas, and avoids the use of adsorbent.

[0009] The utility model provides a high temperature flue gas quenching type waste heat boiler, including total smoke pipe, total out of smoke pipe and fixedly set up in the total smoke pipe and total out of smoke pipe between boiler furnace body, the input and output of boiler furnace body are connected with total smoke pipe and total out of smoke pipe respectively and pass through, still fixedly set up with a plurality of dry ice descaling device on the total out of smoke pipe, dry ice descaling device and boiler furnace body are located on the same axis,

[0010] The boiler furnace body includes a cluster of sleeves and upper and lower pipe headers fixedly arranged at both ends of the cluster of sleeves, respectively. The upper and lower pipe headers are in communication with the internal gap of the cluster of sleeves. Inlet sections and outlet sections are fixedly arranged at both ends of the cluster of sleeves and pass through the total smoke pipe and the total out of smoke pipe, respectively.

[0011] Further, the cluster of sleeves includes an outer pipe and an inner pipe, and a distance rib plate is fixedly arranged between the outer pipe and the inner pipe. The inlet sections and the outlet sections are connected and pass through both ends of the inner pipe through a nozzle. A water inlet is opened on the lower pipe header, and a water outlet is opened on the upper pipe header. The lower pipe header and the upper pipe header are fixedly arranged between the cluster of sleeves and the water inlet / water outlet based on the outer edge surface of the nozzle and pass through the gap between the outer pipe and the inner pipe.

[0012] Further, refractory material is fixedly arranged in the inlet sections and the outlet sections.

[0013] Further, the dry ice descaling device includes a base, a guide rail frame, a driving device, and a spray head. The guide rail frame is fixedly arranged on the base. The spray head is fixedly arranged below the driving device and is controlled by the driving device to reciprocate along the length direction of the guide rail frame.

[0014] Further, it also includes a dry ice descaling rod. The driving device is fixedly arranged at one end of the dry ice descaling rod, and the spray head is fixedly arranged at the other end of the dry ice descaling rod. The driving device drives the rotation of the spray head through the dry ice descaling rod.

[0015] Further, it also includes a dry ice spraying sending device. A sending channel is opened in the dry ice descaling rod along its length direction. One end of the sending channel is in communication with the output end of the dry ice spraying sending device, and the other end is in communication with the input end of the spray head.

[0016] Further, a plurality of cooling water channels are arranged in the dry ice descaling rod. The water inlet and the water outlet of the cooling water channels are fixedly arranged on the driving device.

[0017] Further, the outer diameter of the dry ice descaling rod is smaller than the inner diameter of the inner pipe.

[0018] Further, the boiler furnace and the dry ice descaling device are multiple, and the multiple boiler furnaces and dry ice descaling devices are fixedly arranged based on the length direction of the total smoke inlet pipe and the total smoke outlet pipe;

[0019] The total smoke inlet pipe gradually decreases in width away from the smoke inlet side, and the nitrogen scavenging device is fixedly arranged below the total smoke inlet pipe, and the ash hopper is fixedly arranged below the total smoke inlet pipe close to the smoke inlet.

[0020] The total smoke outlet pipe gradually decreases in width away from the smoke outlet side, and the dry ice descaling device is fixedly arranged on the upper surface of the total smoke outlet pipe through the partition valve, and the soot blowing device is also fixedly arranged on the upper surface of the total smoke outlet pipe close to the partition valve.

[0021] Compared with the prior art, the beneficial effects of the present application include:

[0022] 1) By arranging the cluster sleeve in the boiler furnace, the high-temperature flue gas and the cooling water are in different regions in the cluster sleeve and complete heat exchange, effectively recovering the flue gas waste heat of the high-temperature flue gas, and not causing waste of the heat of the high-temperature flue gas, and there is no contact between the high-temperature flue gas and the cooling water in the heat exchange process, so that in the flue gas cooling process, even if the cooling water is gasified, it will not be mixed with the flue gas, thereby effectively avoiding the problem of "smoke plume";

[0023] 2) By dividing the input high-temperature flue gas into the quenching waste heat boiler to complete the quenching process, compared with quenching the entire input high-temperature flue gas, the heat exchange efficiency of the quenching process can be effectively enhanced;

[0024] 3) By arranging the dry ice descaling device to remove the accumulated ash attached to the boiler furnace, the accumulated ash attached to the inner wall of the inner pipe can be effectively removed, and the removal process does not involve harmful emissions and water, so that there is no residue on the inner wall of the inner pipe, and the use of the soot blowing device and the nitrogen scavenging device for the removal process of the spray pipes at both ends of the cluster sleeve can effectively enhance the heat exchange efficiency in the heat exchange process of the high-temperature flue gas;

[0025] The spray pipes arranged at both ends of the cluster sleeve can slow down the high-temperature flue gas entering each sleeve pipe, so that the temperature field in the pipe is uniformly distributed, thereby improving the heat exchange efficiency and preventing ash deposition. BRIEF DESCRIPTION OF DRAWINGS

[0026] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts. Among them:

[0027] Figure 1 The overall structure of the high-temperature flue gas quenching type waste heat boiler is schematically shown;

[0028] Figure 2 The cross-sectional structure of the boiler furnace body is schematically shown;

[0029] Figure 3 The cross-sectional structure of the cluster jacket is schematically shown;

[0030] Figure 4 The overall structure of the dry ice descaling device is schematically shown;

[0031] Figure 5 The overall structure of the primary flue gas pure dry method purification treatment system of the converter is schematically shown;

[0032] Figure 6 The overall structure of the flue gas pure dry method purification treatment system of the electric furnace is schematically shown.

[0033] Reference numerals in the drawings:

[0034] 1 - total smoke inlet pipe, 2 - total smoke outlet pipe, 3 - boiler furnace body, 4 - upper pipe header, 5 - lower pipe header, 6 - inlet section, 7 - outlet section, 8 - outer pipe, 9 - inner pipe, 10 - distance rib plate, 11 - nozzle, 12 - refractory lining, 13 - dry ice descaling device, 14 - base, 15 - guide rail frame, 16 - driving device, 17 - injection head, 18 - dry ice descaling rod, 19 - dry ice sending device, 20 - nitrogen purging device, 21 - soot blowing device;

[0035] 51 - converter, 52 - movable smoke hood and hood skirt, 53 - vaporization cooling flue, 54 - gas burner, 55 - high-temperature phase change type heat storage device, 56 - water-cooled three-way high-temperature reversing valve, 57 - quenching type waste heat boiler, 58 - dust collector, 59 - flue gas waste heat recovery device, 510 - axial flow fan, 511 - switching valve, 512 - diffusion chimney, 513 - gas tank, 514 - first water-cooled two-way high-temperature reversing valve, 515 - second water-cooled two-way high-temperature reversing valve;

[0036] 61 - electric furnace, 62 - mixed combustion settling cylinder, 57 - quenching type waste heat boiler, 64 - dust collector, 65 - scrap steel furnace gas continuous preheating device, 66 - chimney. DETAILED DESCRIPTION

[0037] It is easy to understand that, according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical scheme of the present application, and should not be regarded as the whole of the present application or as the limitation or restriction of the technical scheme of the present application.

[0038] Figure 1 The schematic diagram illustrates the overall structure of a high-temperature flue gas quenching waste heat boiler, such as... Figure 1 As shown, the boiler includes a main flue gas inlet pipe 1 and a boiler body 3 fixedly installed between the main flue gas inlet pipe 1 and the main flue gas outlet pipe 2. The input end and output end of the boiler body 3 are respectively connected and communicated with the main flue gas inlet pipe 1 and the main flue gas outlet pipe 2. Several descaling devices are also fixedly installed on the main flue gas outlet pipe 2. The aforementioned descaling devices are located on the same axis as the boiler body 3. The descaling devices, which are coaxially installed with the boiler body 3, clean the ash and scale adhering to the inside of the boiler body 3, thereby ensuring the flow of high-temperature flue gas inside the waste heat boiler and enhancing the heat exchange efficiency.

[0039] Figure 2 The schematic diagram shows the cross-sectional structure of the boiler body, such as... Figure 2 As shown, the aforementioned boiler body 3 includes a bundled sleeve and an upper pipe manifold 4 and a lower pipe manifold 5, which are respectively fixed at both ends of the bundled sleeve. The upper pipe manifold 4 and the lower pipe manifold 5 are connected to the internal gap of the bundled sleeve to introduce heat exchange medium into the bundled sleeve to provide heat exchange for the high-temperature flue gas passing through the bundled sleeve, so that the high-temperature flue gas can complete the rapid cooling process. The high-temperature flue gas passes through the inlet section 6 and the outlet section 7, which are fixed at both ends of the bundled sleeve. The aforementioned inlet section 6 is connected to the main flue gas inlet pipe 1, and the outlet section 7 is connected to the main flue gas outlet pipe 2. That is, the high-temperature flue gas input from the main flue gas inlet pipe 1 is diverted through the inlet section 6 and enters multiple boiler bodies 3 to complete the rapid cooling process. Then, it is discharged after merging in the main flue gas outlet pipe 2. By diverting the high-temperature flue gas and then using multiple boiler bodies 3 to rapidly cool the diverted high-temperature flue gas, compared to directly cooling the high-temperature flue gas entering the main flue gas inlet pipe 1, the diversion method can obviously complete the rapid cooling process faster, and the diversion method can greatly enhance the rapid cooling effect on the high-temperature flue gas. After merging in the main flue gas outlet pipe 2, the flue gas is discharged for subsequent dust removal.

[0040] Figure 3 The schematic diagram shows the cross-sectional structure of the bundled sleeve, which is described below in conjunction with... Figure 2 as well as Figure 3The boiler furnace 3 is described in detail. The cluster jacket pipe constituting the boiler furnace 3 includes an outer pipe 8 and an inner pipe 9, and a distance rib plate 10 is fixedly arranged between the outer pipe 8 and the inner pipe 9. The distance rib plate 10 defines the gap size between the outer pipe 8 and the inner pipe 9 on one hand, and supports the inner wall of the outer pipe 8 and the outer wall of the inner pipe 9 on the other hand, and can divide the aforementioned gap into a plurality of separate cavities for the flow of the heat exchange medium. The smaller cavities can effectively improve the flow speed of the heat exchange medium, thereby improving the heat exchange efficiency of the high-temperature medium flowing in the inner pipe 9. The inlet section 6 and the outlet section 7 are connected and penetrated by the two ends of the nozzle 11, and the nozzle 11 can be a Laval nozzle. The water inlet is arranged above the lower header 5, and the water outlet is arranged above the upper header 4. The lower header 5 and the upper header 4 are fixedly arranged between the cluster jacket pipe and the water inlet / water outlet based on the outer edge surface of the aforementioned nozzle 11, and are penetrated by the gap between the outer pipe 8 and the inner pipe 9, so that the heat exchange medium can enter the lower header 5 from the water inlet above the lower header 5, complete the heat exchange process with the high-temperature flue gas flowing in the inner pipe 9 through the gap between the outer pipe 8 and the inner pipe 9, and then flow into the upper header 4, and then be discharged through the water outlet above the upper header 4. In the heat exchange process, the high-temperature flue gas and the heat exchange medium are separated by the inner pipe 9, and there is no contact between the two in the heat exchange process, so that the water vapor in the high-temperature flue gas does not mix into the flue gas in the heat exchange process, thereby affecting the subsequent dust removal process, effectively avoiding the problem of "smoke plume", and effectively recovering the waste heat from the high-temperature flue gas. It is worth noting that the refractory lining 12 is fixedly arranged in the aforementioned inlet section 6 and outlet section 7.

[0041] Figure 4 The overall structure of the dry ice descaling device is schematically shown, and the following will be described in combination with Figure 4The dry ice descaling device 13 is described in detail. The dry ice descaling device 13 comprises a base 14, a guide rail frame 15, a driving device 16, and a spray head 17. The guide rail frame 15 is fixedly arranged on the base 14, and the spray head 17 is fixedly arranged below the driving device 16 and is controlled by the driving device 16 to reciprocate along the length direction of the guide rail frame 15. The dry ice descaling device 13 further comprises a dry ice descaling rod 18. The driving device 16 is fixedly arranged at one end of the dry ice descaling rod 18, and the spray head 17 is fixedly arranged at the other end of the dry ice descaling rod 18. The driving device 16 can drive the dry ice descaling rod 18 to rotate, and the spray head 17 fixedly arranged on the dry ice descaling rod 18 can rotate synchronously with the dry ice descaling rod 18. The driving device 16 can move along the length direction of the guide rail frame 15 fixedly arranged on the base 14, thereby driving the dry ice descaling rod 18 and the spray head 17 to move along the length direction of the guide rail frame 15, and completing the descaling process of the inner wall of the inner tube 9. However, during the process, the spray head 17 is only directed in one fixed direction, so it can only descale one side of the inner wall of the inner tube 9, and it is difficult to descale the other side due to the direction problem. Therefore, the direction of the spray head 17 needs to be adjusted to complete the descaling process of the inner wall of the inner tube 9. Therefore, the driving device 16 should also have a rotating process, and a servo motor and a transmission device can be arranged thereon to synchronously control the rotation of the dry ice descaling rod 18, thereby completing the descaling of the inner wall of the inner tube 9.

[0042] The spray head 17 is supplied with dry ice by a dry ice sending device 19. A sending channel is formed in the dry ice descaling rod 18 along the length direction thereof. One end of the sending channel is in communication with the output end of the dry ice sending device 19, and the other end is in communication with the input end of the spray head 17. The dry ice sending device 19 sends block-shaped or spherical dry ice through the sending channel under the pushing action of nitrogen gas, so that the dry ice is shot out of the spray head 17 and contacts the inner wall of the inner tube 9, so that the attached dust is frozen and brittle, and is peeled off from the inner wall of the inner tube 9 under the action of the dry ice. The cleaning efficiency is high, and no chemical solvent or water is involved, which effectively avoids dust and scaling.

[0043] In the process of sending the dry ice directly to the aforementioned sending channel and ejecting from the spray head 17, the dry ice inevitably contacts and rubs against the inner wall of the sending channel as a solid, which causes the temperature in the sending channel to rise, accelerates the gasification process of the dry ice, and thus affects the progress of the descaling process. A plurality of cooling water channels are arranged in the dry ice descaling rod 18. The cooling water channels can be arranged based on the aforementioned sending channel, such as being arranged in a surrounding manner around the sending channel. By injecting coolant into the cooling water channels and contacting the sending channel, the sending channel is always maintained within a certain temperature range, thereby ensuring the descaling effect on the inner wall of the inner tube 9. The water inlet and outlet of the aforementioned cooling water channels are fixedly arranged on the driving device 16.

[0044] Since the inner tube 9 itself is a pipe body with a certain length, when the inner wall needs to be descaled, it is necessary to extend into it to complete the descaling process. Therefore, the outer diameter of the dry ice descaling rod 18 needs to be smaller than the inner diameter of the inner tube 9, so that the dry ice descaling rod 18 can extend into it. In actual application, the driving device 16, the dry ice descaling rod 18, and the spray head 17 move synchronously. Only the driving device 16 is in contact with the guide rail frame 15, which controls the movement direction of the dry ice descaling rod 18 and the spray head 17, and adjusts the rotation process of the dry ice descaling rod 18 through the driving device 16. Since the spray head 17 and the dry ice descaling rod 18 are coaxially fixed, the spray head 17 can rotate synchronously with the rotation of the dry ice descaling rod 18, thereby completing the descaling and cleaning process of the inner wall of the inner tube 9. The process of spraying dry ice to the inner wall of the inner tube 9 is completely controlled by the aforementioned dry ice launching device.

[0045] The aforementioned boiler furnace body 3 and dry ice descaling device 13 are multiple. The plurality of boiler furnace bodies 3 and dry ice descaling devices 13 are fixedly arranged based on the length direction of the total smoke inlet pipe 1 and the total smoke outlet pipe 2.

[0046] The width of the total flue gas inlet pipe 1 gradually decreases away from the side of the flue gas inlet, specifically, the lower surface gradually inclines upward away from the side of the flue gas inlet, so that the width gradually decreases away from the side of the flue gas inlet. When the high-temperature flue gas enters the flue gas inlet, the high-temperature flue gas that enters first can be pushed into the inner side of the boiler furnace 3 by the high-temperature flue gas that enters later. Because the internal space gradually decreases, the high-temperature flue gas that is farther away from the flue gas inlet enters the boiler furnace 3 at a faster speed, while the high-temperature flue gas that enters the total flue gas inlet pipe 1 closer to the flue gas inlet enters at a relatively slow speed and is squeezed by the subsequent input flue gas, so as to flow into each boiler furnace 3, without the phenomenon of flue gas stagnation in the total flue gas inlet pipe 1. A nitrogen cleaning device 20 is fixedly arranged below the total flue gas inlet pipe 1 to clean the accumulated ash attached to the nozzle 11 close to the side of the total flue gas inlet pipe 1. An ash hopper is fixedly arranged below the total flue gas inlet pipe 1 close to the flue gas inlet to collect and centrally discharge the cleaned accumulated ash.

[0047] The width of the total flue gas outlet pipe 2 gradually decreases away from the side of the flue gas outlet, specifically, the lower surface gradually inclines upward away from the side of the flue gas outlet, so that the width gradually decreases away from the side of the flue gas outlet. When the flue gas enters the total flue gas outlet pipe 2, the flue gas close to the total flue gas outlet pipe 2 will slow down due to the space difference, while the flue gas farther away from the total flue gas outlet pipe 2 will speed up due to the space difference, and is squeezed by the subsequent output flue gas, so as to flow to the flue gas outlet, thereby driving the flue gas close to the flue gas outlet to complete the output, so that the flue gas output from the flue gas outlet is relatively balanced, without the phenomenon of flue gas stagnation. The upper surface of the total flue gas outlet pipe 2 is in a horizontal state. The dry ice descaling device 13 is fixedly arranged on the upper surface of the total flue gas outlet pipe 2 by a partition valve. A soot blowing device 21 is fixedly arranged on the upper surface of the total flue gas outlet pipe 2 close to the partition valve to clean the accumulated ash attached to the nozzle 11 close to the side of the total flue gas outlet pipe 2. The accumulated ash in the nozzle 11 close to the side of the total flue gas outlet pipe 2 blown by the soot blowing device 21, the accumulated ash blown from the inner wall of the inner pipe 9 by the dry ice descaling device 13, and the accumulated ash in the nozzle 11 close to the side of the total flue gas inlet pipe 1 blown by the nitrogen cleaning device 20 all fall into the ash hopper or are stacked nearby, so that the accumulated ash is discharged from the ash hopper.

[0048] A high-temperature flue gas waste heat recovery method is used to complete the waste heat recovery of high-temperature flue gas by using the aforementioned high-temperature flue gas quenching type waste heat boiler. Specifically, the input high-temperature flue gas is divided into multiple heat exchange carriers, low-temperature medium is input into the multiple heat exchange carriers, and the heat exchange process is completed by the high-temperature flue gas in the heat exchange carriers, and then the multiple heat exchange carriers are combined and discharged. The accumulated ash attached to the boiler furnace 3 in the process is descaled according to different positions.

[0049] The following describes the application scenarios of the aforementioned high-temperature flue gas quenching type waste heat boiler.

[0050] Example 1 (application of the high-temperature flue gas quenching type waste heat boiler to a converter primary flue gas pure dry method purification treatment system)

[0051] As shown in Figure 5 , the converter 51 primary flue gas pure dry method purification treatment system includes a gas burner 54, a high-temperature phase change type heat storage device 55, a quenching type waste heat boiler 57 (i.e. the high-temperature flue gas quenching type waste heat boiler in the present application), a dust collector 58, and a flue gas waste heat recovery device 59. The input end of the aforementioned flue gas waste heat recovery device 59 is in communication with the output end of the dust collector 58, the output end of the flue gas waste heat recovery device 59 is in communication with an axial flow fan 510, and the output end of the axial flow fan 510 is in communication with a switching valve 511. One end of the switching valve 511 is in communication with a diffusion chimney 512, and the other end is in communication with a gas cabinet 513.

[0052] It also includes a water-cooled three-way high-temperature reversing valve 56. The first channel of the input end of the water-cooled three-way high-temperature reversing valve 56 is in communication with the gas burner 54, the second channel is in communication with the input end of the high-temperature phase change type heat storage device, and the third channel is in communication with the input end of a first water-cooled two-way high-temperature reversing valve 514. The first output end of the aforementioned first water-cooled two-way high-temperature reversing valve 514 is in communication with the input end of the dust collector 58, and the second output end is in communication with the input end of the quenching type waste heat boiler 57. The output end of the quenching type waste heat boiler 57 is also in communication with the input end of the dust collector 58. The output end of the high-temperature phase change type heat storage device is in communication with the input end of the quenching type waste heat boiler 57 via a second water-cooled two-way high-temperature reversing valve 515.

[0053] It is worth noting that pneumatic ash conveying units are provided below the high-temperature phase change type heat storage device, the quenching type waste heat boiler 57 (i.e. the high-temperature flue gas quenching type waste heat boiler in the present application), and the dust collector 58, and fluidization devices are provided to completely guide the accumulated ash in the high-temperature phase change type heat storage device, the quenching type waste heat boiler 57, and the dust collector 58 into the pneumatic ash conveying units. An emergency injection device is also provided, and its output end is in communication with the input end of the high-temperature phase change type heat storage device, the quenching type waste heat boiler 57, and the dust collector 58. The outputs of the aforementioned pneumatic ash conveying units, fluidization devices, and emergency injection devices are all compressed nitrogen.

[0054] The high-temperature flue gas generated in converter 51 is fed into the input end of water-cooled three-way high-temperature reversing valve 56 through vaporization cooling flue 53 connected to its output end. A movable hood and skirt 52 are installed between vaporization cooling flue 53 and converter 51 to ensure that the high-temperature flue gas output from converter 51 can flow completely into vaporization cooling flue 53 without leakage. At the output end of vaporization cooling flue 53, there are devices such as flue gas pressure transmitter, flue gas temperature transmitter, and measuring devices for measuring the O2, CO, and H2 content in the flue gas. After measurement by the measuring devices, the high-temperature flue gas is selectively fed into one of the following by water-cooled three-way high-temperature reversing valve 56: gas burner 54, high-temperature phase change heat storage device 55, and dust collector 58, to complete the purification process of the flue gas from converter 51.

[0055] CO can be input into the gas burner 54 through another input end. Its output end is connected to the vaporization cooling flue 53. A water-cooled high-temperature resistant slide valve is provided between the output end of the gas burner 54 and the connection between the converter 51 and the movable fume hood to regulate the input or output of high-temperature flue gas.

[0056] Example 2 (Applying a high-temperature flue gas quenching waste heat boiler to an electric furnace flue gas pure dry purification system)

[0057] like Figure 6 As shown, the pure dry method purification system for flue gas from electric furnace 61 includes electric furnace 61, a mixed combustion settling cylinder 62, a rapid cooling waste heat boiler 57, and a dust collector 64. A continuous preheating device for scrap steel furnace gas is also installed on the aforementioned electric furnace 61. The high-temperature flue gas generated from the electric furnace 61 and the flue gas generated from the continuous preheating device for scrap steel furnace gas 65 are both input into the mixed combustion settling cylinder 62 through their respective extraction pipes from different inlets located on the mixed combustion settling cylinder 62. The high-temperature flue gas output from the mixed combustion settling cylinder 62 enters the rapid cooling waste heat boiler 57, undergoes rapid cooling and merging, and is then input into the dust collector 64 for dust removal treatment. Finally, it is discharged through the chimney 66.

[0058] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A high-temperature flue gas quenching type waste heat boiler, characterized by, The utility model relates to a boiler, including total smoke pipe (1), total smoke pipe (2) and fixedly arranged between total smoke pipe (1) and total smoke pipe (2) boiler furnace body (3), the input end and output end of boiler furnace body (3) are connected through total smoke pipe (1) and total smoke pipe (2) respectively, still fixedly arranged with several dry ice descaling device (13) on total smoke pipe (2), dry ice descaling device (13) is located on the same axis with boiler furnace body (3), The boiler furnace body (3) includes a cluster sleeve and an upper tube header (4) and a lower tube header (5) fixedly arranged at both ends of the cluster sleeve, respectively. The upper tube header (4) and the lower tube header (5) are in communication with the internal gap of the cluster sleeve. An inlet section (6) and an outlet section (7) are fixedly arranged at both ends of the cluster sleeve and are connected through the total smoke pipe (1) and the total smoke pipe (2), respectively.

2. The high-temperature flue gas quenched waste heat boiler according to claim 1, characterized in that, The cluster sleeve includes an outer tube (8) and an inner tube (9), and a distance rib (10) is fixedly arranged between the outer tube (8) and the inner tube (9). The inlet section (6) and the outlet section (7) are connected through the inner tube (9) at both ends by a nozzle (11). A water inlet is opened on the lower tube header (5), and a water outlet is opened on the upper tube header (4). The lower tube header (5) and the upper tube header (4) are fixedly arranged between the cluster sleeve and the water inlet / water outlet based on the outer edge surface of the nozzle (11) and are in communication with the gap between the outer tube (8) and the inner tube (9).

3. The high-temperature flue gas quenched waste heat boiler according to claim 2, characterized in that, A refractory lining (12) is fixedly arranged in the inlet section (6) and the outlet section (7).

4. The high temperature flue gas quenched waste heat boiler according to claim 2, characterized in that, The dry ice descaling device (13) includes a base (14), a guide rail frame (15), a driving device (16), and a spray head (17). The guide rail frame (15) is fixedly arranged on the base (14), and the spray head (17) is fixedly arranged below the driving device (16) and is controlled by the driving device (16) to reciprocate along the length direction of the guide rail frame (15).

5. The high temperature flue gas quenched waste heat boiler according to claim 4, characterized in that, A dry ice descaling rod (18) is also included. The driving device (16) is fixedly arranged at one end of the dry ice descaling rod (18), and the spray head (17) is fixedly arranged at the other end of the dry ice descaling rod (18). The driving device (16) drives the rotation of the spray head (17) through the dry ice descaling rod (18).

6. The high temperature flue gas quenched waste heat boiler according to claim 5, characterized in that, A dry ice sending device (19) is also included. A sending channel is opened along the length direction of the dry ice descaling rod (18). One end of the sending channel is in communication with the output end of the dry ice sending device (19), and the other end is in communication with the input end of the spray head (17).

7. The high temperature flue gas quenched waste heat boiler according to claim 5, characterized in that, A plurality of cooling water channels are also arranged in the dry ice descaling rod (18). The water inlet and the water outlet of the cooling water channels are fixedly arranged on the driving device (16).

8. The high temperature flue gas quenched waste heat boiler according to claim 5, characterized in that, The outer diameter of the dry ice descaling rod (18) is smaller than the inner diameter of the inner tube (9).

9. The high temperature flue gas quenched waste heat boiler according to claim 1, characterized in that, The boiler furnace body (3) and the dry ice descaling device (13) are multiple, and the multiple boiler furnace bodies (3) and the dry ice descaling devices (13) are fixedly arranged based on the length direction of the total smoke inlet pipe (1) and the total smoke outlet pipe (2); The total smoke inlet pipe (1) gradually decreases in width away from the smoke inlet side, and the nitrogen purging device (20) is fixedly arranged below the total smoke inlet pipe (1); and the ash hopper is fixedly arranged below the total smoke inlet pipe (1) close to the smoke inlet. The total smoke outlet pipe (2) gradually decreases in width away from the smoke outlet side, and the dry ice descaling device (13) is fixedly arranged on the upper surface of the total smoke outlet pipe (2) through a partition valve; and the soot blowing device (21) is also fixedly arranged on the upper surface of the total smoke outlet pipe (2) close to the partition valve.

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