CN111486466B

CN111486466B - Cooling device for preventing overheating damage of wall surface of graphite quenching tower

Info

Publication number: CN111486466B
Application number: CN201911333355.1A
Authority: CN
Inventors: 吕佳
Original assignee: Nantong Yineng Fine Graphite Technology Co ltd
Current assignee: Nantong Yineng Fine Graphite Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2022-04-05
Anticipated expiration: 2039-12-23
Also published as: CN111486466A

Abstract

The invention discloses a cooling device for preventing the wall surface of a graphite quenching tower from being damaged by overheating, which belongs to the technical field of waste gas treatment, and can realize that self-changing precooling pieces transversely crossing the inner side and the outer side are embedded on a graphite liner, the cooling water part is guided to the inner side of the graphite liner, the precooling is carried out near the wall surface of the inner end of the graphite liner, the heat absorption effect is enhanced through a special vortex structure, meanwhile, the vibration with certain frequency is formed based on the impact of high-temperature flue gas on the self-changing precooling pieces, the evaporation effect near the self-changing precooling pieces is accelerated, the temperature near the wall surface of the inner end of the graphite liner is reduced, the cooling pressure of the graphite liner on the high-temperature flue gas is weakened, the cooling is carried out in the normal heat conduction working range all the time, the phenomenon of damaging by overheating is avoided, meanwhile, the unfolding and the folding of the self-changing precooling pieces are realized through the shape memory effect, and the function of weakening the graphite liner is achieved when the graphite liner is unfolded, and the circulation rate of the high-temperature flue gas and the cooling effect of the wall surface of the graphite liner are recovered during folding.

Description

Cooling device for preventing overheating damage of wall surface of graphite quenching tower

Technical Field

The invention relates to the technical field of waste gas treatment, in particular to a cooling device for preventing the wall surface of a graphite quenching tower from being damaged by overheating.

Background

After the pyrolysis incineration treatment of industrial waste domestic garbage, medical garbage and toxic and harmful substances, the smoke contains a large amount of harmful components such as acid gas and the like, and can be discharged after being treated, pollutants such as organic matters, heavy metals, dioxin, furan and the like in the smoke can be synthesized at about 300 ℃, so that the smoke needs to be rapidly cooled, the dioxin in the environment is difficult to naturally degrade and eliminate and comprises 210 compounds which have high toxicity which is 900 times of that of arsenic and is called as toxicity in the century, and one ten-thousandth or even one billion grams of dioxin can bring serious harm to health.

The waste gas in the prior art contains more components and various corrosive gases, the traditional stainless steel quench tower is difficult to meet the requirements, the graphite has strong corrosion resistance and can perfectly replace stainless steel equipment, and the impervious graphite material has good heat conductivity and corrosion resistance by rapidly cooling high-temperature flue gas in the graphite quench tower. Practice proves that compared with traditional materials such as steel, ceramics, glass, enamel and the like, carbon and graphite have excellent corrosion resistance and heat conduction performance for hydrochloric acid, phosphoric acid, sulfuric acid and hydrofluoric acid with all concentrations and including fluorine-containing media, and energy-saving and environment-friendly performances are good, and the heat conduction performance in non-metal materials is only higher than that of metal materials, so that the graphite quenching tower is widely applied to the chemical industry.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a cooling device for preventing the wall surface of a graphite quenching tower from being damaged by overheating, which can realize that a self-changing precooling piece transversely striding on the inner side and the outer side is embedded on a graphite liner, the cooling water part is guided to the inner side of the graphite liner, the precooling is carried out near the wall surface of the inner end of the graphite liner, the heat absorption effect is enhanced through a special vortex structure, meanwhile, the vibration with certain frequency is formed based on the impact of high-temperature flue gas on the self-changing precooling piece, the evaporation effect near the self-changing precooling piece is accelerated, the temperature near the wall surface of the inner end of the graphite liner is promoted to be reduced, the cooling pressure of the graphite liner on the high-temperature flue gas is weakened, the cooling is carried out in the normal heat conduction working range all the time, the phenomenon of damaging by overheating is avoided, meanwhile, the unfolding and folding of the self-changing precooling piece are realized through the shape memory effect, and the function of weakening the graphite liner is carried out during the unfolding, and the circulation rate of the high-temperature flue gas and the cooling effect of the wall surface of the graphite liner are recovered during folding.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A cooling device for preventing the wall surface of a graphite quenching tower from being damaged by overheating comprises a shell of the quenching tower and a graphite liner positioned at the inner side of the shell, a cooling water circulation cavity is formed between the shell of the quenching tower and the graphite inner container, a plurality of self-changing precooling pieces which are uniformly distributed are embedded and installed on the graphite inner container in a penetrating way, the self-changing precooling piece comprises a sleeping T-shaped rod positioned in a cooling water circulation annular cavity, L-shaped flow channels which are distributed up and down symmetrically are formed in the sleeping T-shaped rod, one end of the sleeping T-shaped rod close to the inner side of the graphite liner is fixedly connected with a matched elastic deformation rod, a pair of parallel convection channels which are matched and communicated with the L-shaped flow channel are drilled at the inner end of the elastic deformation rod, one end of the elastic deformation rod, far away from the T-shaped rod, is fixedly connected with a vortex cold pipe, and the water inlet and the water outlet of the vortex cold pipe are respectively communicated with the upper and lower paired flow passages, and matched double cold vortex sheets are embedded and installed between the outer side walls of the vortex cold pipes.

Further, the high temperature memory piece that a plurality of annular array distribute is installed to elastic deformation pole surface inlay, elastic deformation pole is close to the fixed cover of sleeping T type pole one end and has been connect the elastic packaging cover, and the outer end of elastic packaging cover parcel at high temperature memory piece, and high temperature memory piece has the characteristics of response temperature variation, plays the setting supporting role to elastic deformation pole simultaneously, and elastic packaging cover is used for providing certain elastic vibration interval for elastic deformation pole and vortex cold pipe part realize the vibration under the impact of high temperature flue gas.

Furthermore, the high-temperature memory sheet is made of high-temperature phase austenite phase shape memory alloy, the high-temperature phase shape is linear, the low-temperature phase shape is an upward-bent L-shaped shape, and the self-changing precooling piece does not need to precool to weaken the heat conduction effect of the self-changing precooling piece in the normal heat conduction working range of the graphite liner, so that the normal state of the high-temperature memory sheet, namely the low-temperature phase shape, is the upward-bent L-shaped shape, the self-changing precooling piece is folded upwards, cooling water cannot flow in the self-changing precooling piece at the moment, high-temperature flue gas can flow at normal speed, the graphite liner also normally exerts the heat conduction effect, when the temperature near the wall surface of the graphite liner is higher to the possibility of damaging the graphite liner, the high-temperature memory sheet is changed into the high-temperature phase shape, namely the linear shape, the self-changing precooling piece is promoted to be unfolded, the ascending high-temperature flue gas is intercepted and precooled layer by layer, and the temperature near the graphite liner is reduced, the heat conduction pressure of the graphite inner container is weakened.

Furthermore, a shaping net is embedded in the elastic wrapping sleeve, a heat-conducting metal ball is arranged at a node of the shaping net, a heat-conducting mixture is filled in the heat-conducting metal ball, the shaping net plays roles in shaping and reinforcing the elastic wrapping sleeve, the phenomenon that the elastic wrapping sleeve is damaged under the high-frequency vibration of the self-changing precooling piece is avoided, and meanwhile, the function of transferring the heat of the graphite inner container to the high-temperature memory sheet is achieved.

Furthermore, the heat-conducting mixture is a mixture of heat-conducting sand and heat-conducting oil with a mixing ratio of 1:2-3, the forming net and the heat-conducting metal balls are made of aluminum alloy materials, the heat conductivity of the elastic wrapping sleeve is improved as much as possible on the premise of certain strength, on one hand, the whole length of the high-temperature memory sheet is basically at the same temperature, and on the other hand, the heat of part of the graphite liner can be absorbed.

Further, the two cold vortex pieces are inlayed and run through and extend to the vortex in the cold pipe, the edge sets up to the wave in the two cold vortex pieces extend to the vortex cold pipe, the two cold vortex pieces directly run through extend to the vortex cold pipe in with wherein the cooling water contact that flows, on the one hand can be faster with the heat of two cold vortex pieces to the conduction in the cooling water, on the other hand can improve the structural stability of two cold vortex pieces, the phenomenon that drops appears in the difficult impact of high temperature flue gas down, the setting at wave edge can increase with the area of contact of two cold vortex pieces and cooling water, improve the heat transfer effect.

Further, the double-cold-vortex sheet comprises a pair of moisture absorption evaporation layers and an instant heat conduction layer positioned between the moisture absorption evaporation layers and the instant heat conduction layer, and the moisture absorption evaporation layers and the instant heat conduction layer are mutually bonded through heat conduction glue, the moisture absorption evaporation layer is prepared by mixing high molecular water absorption resin and fluff fiber, the quick heat conduction layer is a graphene film, the graphene film has super-strong heat conduction performance, and the heat conduction selection has certain directionality, the heat absorbed by the heat-conducting layer is transferred to the cooling water in the vortex cold pipe along the plane direction, the high-temperature flue gas cooling device has the advantages that loss can not be dissipated, the moisture absorption evaporation layer has good moisture absorption performance, a part of cooling water in flowing can be absorbed, and a part of original spraying liquid can be absorbed and is used for being directly contacted with high-temperature flue gas, on one hand, the phenomenon of overheating damage also occurs in the protection heat conduction layer, on the other hand, the effect of evaporation heat absorption is utilized, the self vibration effect is assisted, and the cooling effect on the high-temperature flue gas can be accelerated.

Further, the graphite inner bag is including inside and outside distribution and integrated into one piece's inner bag inlayer and inner bag skin, it has the subsides of a plurality of evenly distributed's the subsides cold groove and the runner that walks that the intercommunication subsides the cold groove to dig on the outer lateral wall of inner bag, the setting that subsides the cold groove that is sunken in is used for increasing recirculated cooling water and the outer area of contact of inner bag to promote the cooling effect, avoid appearing the phenomenon that the heat excessively piles up at the inner bag inlayer, it is used for walking the circulation speed of water acceleration cooling water to walk the runner, avoid appearing the detention phenomenon, make things convenient for the recirculated flow's cooling water to keep the low temperature to take away the heat fast throughout.

Further, still fixed mounting has a plurality of evenly distributed's buret on graphite inner bag inner top, the water inlet of buret has the storage water tank of installing the booster pump through external pipe connection to the form of drip spray liquid forces it to avoid flowing under the action of gravity along graphite inner bag the inner, and the liquid film that forms the protection graphite inner bag participates in the evaporation, directly absorbs the heat in the high temperature flue gas, and the heat conduction pressure of supplementary precooling spare weakening graphite inner bag of autogamy prevents effectively that the phenomenon of overheat damage from appearing in the inner wall of graphite inner bag.

Furthermore, the diameter ratio of the length of the vortex cold pipes to the graphite liner is 1:5-6, the number of the vortex cold pipes distributed in an annular array is not less than 4, the distance between the upper and lower self-changing precooling parts is twice the length of the vortex cold pipes, and the vortex cold pipes are reasonably arranged in density and interval, so that the interference on the flow velocity of high-temperature flue gas is reduced as much as possible while precooling is effectively performed, and the overheating protection of the inner end wall surface of the graphite liner is realized on the premise that the influence on the overall cooling efficiency is small.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme can realize that the self-changing precooling piece transversely striding the inner side and the outer side is embedded on the graphite inner container, the cooling water part is guided to the inner side of the graphite inner container, precooling is carried out near the inner end wall surface of the graphite liner, the heat absorption effect is enhanced through a special vortex structure, meanwhile, the high-temperature flue gas impacts the self-changing precooling piece to form vibration with a certain frequency, so that the evaporation effect nearby is accelerated, the temperature nearby the wall surface of the inner end of the graphite liner is reduced, and the cooling pressure of the graphite inner container to the high-temperature flue gas is weakened, so that the graphite inner container is cooled in the normal heat conduction working range all the time, the phenomenon of overheating damage is avoided, meanwhile, the expansion and folding of the self-changing precooling piece are realized through the shape memory effect, the function of precooling and weakening the graphite liner is realized during the expansion, and the circulation rate of high-temperature flue gas and the cooling effect of the wall surface of the graphite liner are recovered during the folding.

(2) The high temperature memory piece that installs a plurality of annular array distributions is inlayed to elastic deformation pole surface, elastic deformation pole is close to the fixed cover of sleeping T type pole one end and has been connect the elasticity parcel cover, and the outer end at the high temperature memory piece is wrapped up in to the elasticity parcel, the high temperature memory piece has the characteristics of response temperature variation, play the setting supporting role to elastic deformation pole simultaneously, the elasticity parcel is applied mechanically and is provided certain elastic vibration interval, make elastic deformation pole and vortex cold tube part realize the vibration under the impact of high temperature flue gas.

(3) The high-temperature memory sheet is made of high-temperature phase austenite phase shape memory alloy, the shape of the high-temperature phase is linear, the shape of the low-temperature phase is an upward bent L-shaped shape, in the normal heat conduction working range of the graphite liner, the self-changing precooling piece does not need to precool to weaken the heat conduction effect, therefore, the normal state of the high-temperature memory chip, namely the shape of the low-temperature phase is an upward-bent L-shaped shape, the self-changing precooling piece is folded upwards, at the moment, cooling water cannot flow in the self-changing precooling piece, high-temperature smoke can flow at normal speed, the graphite liner can normally exert the heat conduction effect, when the temperature near the inner wall surface of the graphite liner is higher to damage the graphite liner, the high-temperature memory sheet is changed into a high-temperature phase shape, namely a linear shape, so that the self-changing precooling piece is expanded, the rising high-temperature flue gas is intercepted and precooled layer by layer, the temperature nearby is reduced, and the heat conduction pressure of the graphite liner is weakened.

(4) The setting net is embedded in the elastic wrapping sleeve, the heat-conducting metal balls are arranged at the nodes of the setting net, the heat-conducting metal balls are filled with heat-conducting mixtures, the setting net plays a role in setting and strengthening the elastic wrapping sleeve, the phenomenon that the elastic wrapping sleeve is damaged under the high-frequency vibration of the self-changing precooling piece is avoided, and meanwhile, the effect of transferring the heat of the graphite inner container to the high-temperature memory sheet is achieved.

(5) The heat-conducting mixture is a mixture of heat-conducting sand and heat-conducting oil with a mixing ratio of 1:2-3, the forming net and the heat-conducting metal balls are made of aluminum alloy materials, and on the premise of certain strength, the heat conductivity of the elastic wrapping sleeve is improved as much as possible, so that on one hand, the whole length of the high-temperature memory sheet is basically at the same temperature, and on the other hand, the heat of a part of the graphite liner can be absorbed.

(6) The dual-cooling vortex piece is inlayed and is run through and extend to the vortex in the cold pipe, the edge sets up to the wave in the dual-cooling vortex piece extends to the vortex cold pipe, the dual-cooling vortex piece directly runs through and extends to the vortex in the cold pipe with wherein cooling water contact that flows, heat to the cooling water conduction on the dual-cooling vortex piece that on the one hand can be more quick, on the other hand can improve the structural stability of dual-cooling vortex piece, the phenomenon that drops appears in the difficult impact of high temperature flue gas down, the area of contact with dual-cooling vortex piece and cooling water can be increased in the setting of wave edge, the heat transfer effect is improved.

(7) The double-cooling vortex sheet comprises a pair of moisture absorption evaporation layers and a quick heat conduction layer positioned between the moisture absorption evaporation layers, the moisture absorption evaporation layers are bonded with each other through heat conduction glue, the quick heat conduction layer is prepared by mixing high-molecular water-absorbent resin and fluff fibers, the quick heat conduction layer is a graphene film, the graphene film has super-strong heat conduction performance, and the heat conduction selection has certain directionality, the heat absorbed by the heat-conducting layer is transferred to the cooling water in the vortex cold pipe along the plane direction, the high-temperature flue gas cooling device has the advantages that loss can not be dissipated, the moisture absorption evaporation layer has good moisture absorption performance, a part of cooling water in flowing can be absorbed, and a part of original spraying liquid can be absorbed and is used for being directly contacted with high-temperature flue gas, on one hand, the phenomenon of overheating damage also occurs in the protection heat conduction layer, on the other hand, the effect of evaporation heat absorption is utilized, the self vibration effect is assisted, and the cooling effect on the high-temperature flue gas can be accelerated.

(8) Graphite inner bag is including inside and outside distribution and integrated into one piece's inner bag inlayer and inner bag skin, it has the subsides of a plurality of evenly distributed's the subsides cold groove and the runner that walks of the subsides cold groove that communicates to sink to cut on the outer lateral wall of inner bag, the setting of the subsides cold groove that sinks in is used for increasing recirculated cooling water and the outer area of contact of inner bag, thereby promote the cooling effect, avoid appearing the phenomenon that the heat excessively piles up at the inner bag inlayer, it is used for walking the circulation speed of water accelerated cooling water to walk the runner, avoid appearing the detention phenomenon, make things convenient for the cooling water of circulation flow to keep low temperature to take away the heat fast throughout.

(9) Still fixed mounting has a plurality of evenly distributed's buret on graphite inner bag top, the water inlet of buret has the storage water tank of installing the booster pump through external pipe connection, with the form of drip spray liquid, force it to avoid flowing under the action of gravity along graphite inner bag the inner, the liquid film that forms the protection graphite inner bag participates in the evaporation, directly absorbs the heat in the high temperature flue gas, supplementary heat conduction pressure who becomes precooling piece weakening graphite inner bag certainly, effectively prevent that the phenomenon of overheat damage from appearing in the inner wall of graphite inner bag.

(10) The diameter ratio of the length of the vortex cold pipes to the graphite liner is 1:5-6, the number of the vortex cold pipes distributed in an annular array is not less than 4, the distance between the upper and lower self-changing precooling parts is twice the length of the vortex cold pipes, and the vortex cold pipes are reasonably arranged in density and interval, so that the interference on the flow velocity of high-temperature flue gas is reduced as much as possible while precooling is effectively performed, and the overheat protection on the inner end wall surface of the graphite liner is realized on the premise that the influence on the whole cooling efficiency is small.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic diagram of a portion of a self-changing pre-chill of the present invention;

FIG. 4 is a schematic structural view of a vortex cooling tube according to the present invention;

FIG. 5 is a schematic structural view of a double cold scroll plate according to the present invention;

FIG. 6 is a schematic structural view of a thermally conductive metal ball according to the present invention;

FIG. 7 is a cross-sectional view of a portion of the graphite inner bladder of the present invention;

fig. 8 is a schematic structural diagram of the self-changing pre-cooling element in a normal state according to the present invention.

The reference numbers in the figures illustrate:

1 quenching tower shell, 2 graphite inner container, 201 inner container layer, 202 inner container layer, 203 invagination paste cold groove, 204 water flow channel, 3 self-changing precooling piece, 301 sleeping T-shaped rod, 302 elastic deformation rod, 303 vortex cold pipe, 4 high temperature memory sheet, 5 elastic wrapping sleeve, 6 shaping net, 7 heat conduction metal ball, 8 double cold vortex sheet, 801 moisture absorption evaporation layer, 802 speed heat conduction layer, 9 drip tube, 10 heat conduction mixture.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements.

Example 1:

referring to fig. 1, a cooling device for preventing the wall surface of a graphite quench tower from being damaged by overheating comprises a quench tower shell 1 and a graphite inner container 2 positioned at the inner side of the quench tower shell, a cooling water circulation cavity is formed between the quench tower shell 1 and the graphite inner container 2, a plurality of uniformly distributed self-changing precooling members 3 are embedded and installed on the graphite inner container 2 in a penetrating manner, referring to fig. 2-3, each self-changing precooling member 3 comprises a sleeping T-shaped rod 301 positioned in a cooling water circulation annular cavity, L-shaped channels which are symmetrically distributed up and down are formed in the sleeping T-shaped rod 301, one end of the sleeping T-shaped rod 301 close to the inner side of the graphite inner container 2 is fixedly connected with a matched elastic deformation rod 302 which is made of an elastic plastic material, a pair of convection channels which are parallel and communicated with the L-shaped channels are chiseled at the inner end of the elastic deformation rod 302, one end of the elastic deformation rod 302 far away from the sleeping T-shaped rod 301 is fixedly connected with a vortex cooling tube 303, and a water inlet and a water outlet of the vortex cooling tube 303 are respectively communicated with the pair of the upper and the lower pair of the flow channels, inlay between the cold pipe 303 lateral wall of vortex and install assorted two cold vortex pieces 8, the high temperature memory piece 4 that a plurality of annular array distribute is installed to elastic deformation pole 302 surface inlay, elastic deformation pole 302 is close to the fixed cover of sleeping T type pole 301 one end and has been connect elastic wrapping 5, and elastic wrapping 5 wraps up in the outer end of high temperature memory piece 4, high temperature memory piece 4 has the characteristics of response temperature variation, play the setting supporting role to elastic deformation pole 302 simultaneously, elastic wrapping 5 is used for providing certain elastic vibration interval, make elastic deformation pole 302 and the cold pipe 303 part of vortex realize the vibration under the impact of high temperature flue gas, evaporation heat absorption is accelerated on the one hand, graphite inner bag 2 can be kept away from to on the other hand partial high temperature flue gas of fanning, reduce the temperature in near graphite inner bag 2 space.

Referring to fig. 8, the high-temperature memory sheet 4 is made of a high-temperature phase austenite phase shape memory alloy, the high-temperature phase shape is linear, the low-temperature phase shape is an upward-curved L-like shape, and within the normal heat conduction working range of the graphite liner 2, the self-changing pre-cooling member 3 does not need to pre-cool to weaken the heat conduction effect thereof, so that the normal state of the high-temperature memory sheet 4, that is, the low-temperature phase shape, is an upward-curved L-like shape, the self-changing pre-cooling member 3 is folded upward, at this time, cooling water does not flow in the self-changing pre-cooling member 3, high-temperature flue gas can also flow at a normal speed, the graphite liner 2 also normally exerts the heat conduction effect thereof, when the temperature near the inner end wall surface of the graphite liner 2 is high to possibly damage the graphite liner 2, the high-temperature memory sheet 4 is changed into the high-temperature phase shape, that is linear, so as to promote the self-changing pre-cooling member 3 to expand, and pre-cool the rising high-temperature flue gas layer by layer, the temperature nearby is reduced, and the heat conduction pressure of the graphite inner container 2 is weakened.

Referring to fig. 3 and 6, a shaping net 6 is embedded in the elastic wrapping sleeve 5, a heat conducting metal ball 7 is arranged at a node of the shaping net 6, a heat conducting mixture 10 is filled in the heat conducting metal ball 7, the shaping net 6 plays a role in shaping and reinforcing the elastic wrapping sleeve 5, the elastic wrapping sleeve 5 is prevented from being damaged under the high-frequency vibration of the self-changing precooling piece 3, meanwhile, the heat of the graphite liner 2 is partially transferred to the high-temperature memory sheet 4, the heat-conducting mixture 10 is a mixture of heat-conducting sand and heat-conducting oil with the mixing ratio of 1:2-3, the shaping net 6 and the heat-conducting metal balls 7 are both made of aluminum alloy materials, on the premise of certain strength, the heat conductivity of the elastic wrapping sleeve 5 is improved as much as possible, on one hand, the whole length of the high-temperature memory sheet 4 is basically kept at the same temperature, and on the other hand, the heat of part of the graphite inner container 2 can be absorbed.

Referring to fig. 4-5, the double-cooling vortex sheet 8 is embedded and extended into the vortex cooling tube 303, the edge of the double-cooling vortex sheet 8 extending into the vortex cooling tube 303 is set to be wavy, the double-cooling vortex sheet 8 is directly extended into the vortex cooling tube 303 to contact with the cooling water flowing therein, on one hand, the heat on the double-cooling vortex sheet 8 can be more rapidly conducted into the cooling water, on the other hand, the structural stability of the double-cooling vortex sheet 8 can be improved, and the double-cooling vortex sheet 8 is not easy to fall off under the impact of high-temperature flue gas, the arrangement of the wavy edge can increase the contact area between the double-cooling vortex sheet 8 and the cooling water, and improve the heat exchange effect, the double-cooling vortex sheet 8 includes a pair of moisture absorption evaporation layers 801 and a fast heat conduction layer 802 located between the moisture absorption evaporation layers and bonded with each other through heat conduction glue, the moisture absorption evaporation layers 801 are made of high molecular water-absorbent resin and fluff fiber, the fast heat conduction layer 802 is a graphene film, the graphene film has super-strong heat conducting performance, and the heat conducting selection has certain directionality, so the heat absorbed by the quick heat conducting layer 802 can be conducted to the cooling water in the vortex cold pipe 303 along the plane direction, and can not be dissipated, the moisture absorption evaporation layer 801 has good moisture absorption, not only can absorb part of the cooling water in the flow, but also can absorb part of the original spraying liquid, and is used for directly contacting with high-temperature flue gas, on one hand, the phenomenon of overheat damage also occurs in the quick heat conducting layer 802 is protected, on the other hand, the effect of evaporation heat absorption is utilized and the self vibration effect is assisted, and the cooling effect on the high-temperature flue gas can be accelerated.

Referring to fig. 7, the graphite inner container 2 includes an inner container inner layer 201 and an outer container layer 202 which are distributed inside and outside and are integrally formed, a plurality of uniformly distributed invagination-attached cold grooves 203 and a water flowing channel 204 communicating the invagination-attached cold grooves 203 are cut on the outer side wall of the inner container layer 202, the arrangement of the invagination-attached cold grooves 203 is used for increasing the contact area of circulating cooling water and the outer container layer 202, thereby improving the cooling effect, avoiding the phenomenon that heat is excessively accumulated on the inner container inner layer 201, the water flowing channel 204 is used for flowing water to accelerate the circulation speed of the cooling water, avoiding the retention phenomenon, and making the cooling water which flows circularly can be always kept at low temperature to quickly take away heat.

Referring to fig. 1, the top end of the graphite inner container 2 is also fixedly provided with a plurality of uniformly distributed drip pipes 9, the water inlet of the drip pipes 9 is connected with a water storage tank provided with a booster pump through an external pipeline, and the drip pipes are forced to flow along the inner end of the graphite inner container 2 in a manner of drip spraying liquid to form a liquid film for protecting the graphite inner container 2 from being evaporated under the action of gravity, so as to directly absorb heat in high-temperature flue gas, and assist the self-changing precooling members 3 to weaken the heat conduction pressure of the graphite inner container 2, thereby effectively preventing the inner end wall surface of the graphite inner container 2 from being damaged due to overheating, the ratio of the length of the vortex cold pipes 303 to the length of the graphite inner container 2 is 1:5-6, the number of the vortex cold pipes distributed in an annular array is not less than 4, the distance between the upper and lower self-changing precooling members 3 is twice the length of the vortex cold pipes 303, the reasonable density and the distance arrangement are adopted, and when precooling is effectively performed, the interference on the circulation speed of the high-temperature flue gas is reduced as much as possible, namely, the overheating protection of the inner end wall surface of the graphite liner 2 is realized on the premise that the influence on the whole cooling efficiency is small.

The invention can realize that the self-changing precooling pieces 3 transversely spanning the inner side and the outer side are embedded on the graphite liner 2, the cooling water part is guided to the inner side of the graphite liner 2, precooling is carried out near the inner end wall surface of the graphite liner 2, the heat absorption effect is enhanced through a special vortex structure, meanwhile, the high-temperature flue gas impacts the self-changing precooling piece 3 to form vibration with a certain frequency, so that the evaporation effect nearby is accelerated, the temperature nearby the inner end wall surface of the graphite liner 2 is reduced, and the cooling pressure of the graphite inner container 2 to the high-temperature flue gas is weakened, so that the graphite inner container is cooled in the normal heat conduction working range all the time, the phenomenon of overheating damage is avoided, meanwhile, the expansion and folding of the self-changing precooling piece 3 are realized through the shape memory effect, the function of precooling and weakening the graphite liner 2 is realized during the expansion, and the circulation rate of high-temperature flue gas and the cooling effect of the wall surface of the graphite liner 2 are recovered during the folding.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. The utility model provides a prevent overheated cooling device who damages of graphite quench tower wall, includes quench tower shell (1) and is located its inboard graphite inner bag (2), form cooling water circulation chamber between quench tower shell (1) and graphite inner bag (2), its characterized in that: a plurality of self-changing precooling pieces (3) which are uniformly distributed are embedded and penetrated on the graphite inner container (2), the self-changing precooling piece (3) comprises a sleeping T-shaped rod (301) positioned in a cooling water circulation annular cavity, l-shaped flow channels which are symmetrically distributed up and down are drilled in the sleeping T-shaped rod (301), one end of the sleeping T-shaped rod (301) close to the inner side of the graphite inner container (2) is fixedly connected with a matched elastic deformation rod (302), a pair of parallel convection channels which are matched and communicated with the L-shaped flow channel are drilled at the inner end of the elastic deformation rod (302), one end of the elastic deformation rod (302) far away from the T-shaped sleeping rod (301) is fixedly connected with a vortex cold pipe (303), and the water inlet and the water outlet of the vortex cold pipe (303) are respectively communicated with the upper and the lower pairs of flow passages, the outer side wall of the vortex cold pipe (303) is embedded with matched double cold vortex sheets (8); the outer surface of the elastic deformation rod (302) is embedded with a plurality of high-temperature memory sheets (4) distributed in an annular array manner, one end of the elastic deformation rod (302), which is close to the T-shaped sleeping rod (301), is fixedly sleeved with an elastic wrapping sleeve (5), and the elastic wrapping sleeve (5) wraps the outer end of each high-temperature memory sheet (4); the high-temperature memory sheet (4) is made of high-temperature phase austenite phase shape memory alloy, the shape of the high-temperature phase is linear, and the shape of the low-temperature phase is L-shaped which is bent upwards; a shaping net (6) is embedded in the elastic wrapping sleeve (5), a heat-conducting metal ball (7) is arranged at a node of the shaping net (6), and a heat-conducting mixture (10) is filled in the heat-conducting metal ball (7); the heat-conducting mixture (10) is a mixture of heat-conducting sand and heat-conducting oil with the mixing ratio of 1:2-3, and the shaping net (6) and the heat-conducting metal balls (7) are both made of aluminum alloy materials.

2. The cooling device for preventing the wall surface of the graphite quenching tower from being damaged by overheating as claimed in claim 1, wherein: the double-cooling vortex sheet (8) is embedded and extends into the vortex cooling pipe (303) in a penetrating mode, and the edge of the double-cooling vortex sheet (8) extending into the vortex cooling pipe (303) is set to be wavy.

3. The cooling device for preventing the wall surface of the graphite quenching tower from being damaged by overheating as claimed in claim 2, wherein: the double-cold-vortex sheet (8) comprises a pair of moisture absorption evaporation layers (801) and a quick heat conduction layer (802) located between the moisture absorption evaporation layers and bonded with each other through heat conduction glue, the moisture absorption evaporation layers (801) are made by mixing high molecular water-absorbent resin and fluff fibers, and the quick heat conduction layer (802) is a graphene film.

4. The cooling device for preventing the wall surface of the graphite quenching tower from being damaged by overheating as claimed in claim 3, wherein: graphite inner bag (2) are including inside and outside distribution and integrated into one piece's inner bag inlayer (201) and inner bag outer (202), it has a plurality of evenly distributed's subsides cold groove (203) and communicates the water flowing channel (204) that subsides cold groove (203) that sink in to dig on the outer (202) lateral wall of inner bag.

5. The cooling device for preventing the wall surface of the graphite quenching tower from being damaged by overheating as claimed in claim 4, wherein: the graphite inner bag (2) interior top still fixed mounting have a plurality of evenly distributed's buret (9), the water inlet of buret (9) has the storage water tank of installing the booster pump through external pipe connection.

6. The cooling device for preventing the wall surface of the graphite quenching tower from being damaged by overheating as claimed in claim 5, wherein: the diameter ratio of the length of the vortex cold pipes (303) to the graphite liner (2) is 1:5-6, the number of the vortex cold pipes distributed in an annular array is not less than 4, and the distance between the upper and lower self-changing precooling parts (3) is twice the length of the vortex cold pipes (303).