CN114164009A - Coke oven riser waste heat recovery device and control method thereof - Google Patents
Coke oven riser waste heat recovery device and control method thereof Download PDFInfo
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- CN114164009A CN114164009A CN202111479199.7A CN202111479199A CN114164009A CN 114164009 A CN114164009 A CN 114164009A CN 202111479199 A CN202111479199 A CN 202111479199A CN 114164009 A CN114164009 A CN 114164009A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B41/00—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
- C10B41/08—Safety devices, e.g. signalling or controlling devices for use in the discharge of coke for the withdrawal of the distillation gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a waste heat recovery device of a coke oven ascending pipe and a control method thereof, wherein the waste heat recovery device comprises a sleeve pipe sleeved outside the ascending pipe, a heat exchange cavity is formed between the sleeve pipe and the ascending pipe, a circulating working medium is filled in the heat exchange cavity, an external heat exchange mechanism is sleeved outside the sleeve pipe, a hot end positioned on the outer side of the outer wall of the ascending pipe and a cold end positioned on the inner side of the inner wall of the sleeve pipe are arranged in the heat exchange cavity, the circulating working medium absorbs heat at the hot end for vaporization, and then flows to the cold end under the action of pressure to exchange heat with the external heat exchange mechanism for liquefaction to form circulation. The waste heat recovery of the raw coke oven gas is realized by adopting an indirect heat exchange mode, the circulating working medium in the heat exchange cavity absorbs heat at the hot end of the outer wall of the riser and is gasified, the cold end of the inner wall of the sleeve exchanges heat with the external heat exchange mechanism, and the circulating working medium is liquefied when meeting cold and returns to the hot end to form circulation.
Description
Technical Field
The invention relates to the technical field of raw gas waste heat recovery, in particular to a waste heat recovery device for a coke oven ascending pipe and a control method thereof.
Background
The coke oven is key equipment and an energy focusing point for the production of a coking enterprise, and the highest three items of coke oven expenditure heat are respectively high-temperature waste heat brought out by red coke in a coking chamber, and account for about 37 percent; the moderate temperature waste heat everywhere of the high-temperature raw gas of the ascending pipe accounts for about 33 percent; low-temperature waste heat brought out by the flue gas. The recovery technology of the high-temperature waste heat and the low-temperature waste heat is mature, and the successful cases of recovering and utilizing the medium-temperature waste heat brought by the high-temperature raw coke oven gas in the riser are few.
In the prior art, a waste heat recovery device for an ascending pipe mainly has three structures, namely a water jacket structure, a single-layer inner coil structure and a half-pipe coil structure. The water jacket structure is characterized in that a sleeve with a larger diameter is additionally arranged outside the ascending pipe, water is filled in the water jacket structure for heat exchange, when the jacket water reaches a certain temperature and pressure, the ascending pipe of the inner cylinder bears external pressure, so the pressure of the ascending pipe of the inner cylinder is limited by the bearing capacity of the cylinder, namely the steam pressure cannot be too high, the current gas production pressure is below 0.8MPa, the technology is successively applied to various enterprises in China, and due to the uneven heat exchange of the jacket water, when the temperature of coke oven gas is reduced to be below 500 ℃, the tar coagulation phenomenon is serious, and the problems of tearing, water leakage, steam leakage and the like can occur on the welding line of the cylinder of the ascending pipe; the single-layer inner coil structure is characterized in that raw gas directly exchanges heat with the single-layer spiral coil, a large amount of tar is condensed in the heat exchange mode, and coking and dust deposition can be generated after the single-layer inner coil is used for a period of time to influence the use effect; the half-pipe spiral structure is formed by spirally welding a half pipe around the outer wall of the ascending pipe cylinder body for heat exchange, a welding line is easy to tear in the using process, the half-pipe spiral structure cannot be used for a long time, and the problem of tar condensation cannot be solved.
Therefore, it is necessary to develop a new type of waste heat recovery system for the ascending pipe of the coke oven.
Disclosure of Invention
The invention aims to provide a waste heat recovery device of a coke oven ascending pipe and a control method thereof, and aims to solve the technical problems that the gas production pressure of the waste heat recovery device aiming at the ascending pipe in the prior art is below 0.8MPa, tar is seriously condensed, and the welding seam of a cylinder body is torn, leaks water and leaks steam.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the invention provides a waste heat recovery device for an ascending pipe of a coke oven, which comprises a sleeve pipe sleeved outside the ascending pipe, wherein a sealed heat exchange cavity is formed between the sleeve pipe and the ascending pipe, a circulating working medium is filled in the heat exchange cavity, an external heat exchange mechanism is sleeved outside the sleeve pipe, cold ends positioned on the outer side of the outer wall of the ascending pipe and on the inner side of the inner wall of the sleeve pipe are arranged in the heat exchange cavity, the circulating working medium absorbs heat at the hot end for vaporization, and then flows to the cold end under the action of pressure to be subjected to heat exchange liquefaction with the external heat exchange mechanism to form circulation.
By adopting the scheme, the circulating working medium absorbs heat at the hot end of the heat exchange cavity to be vaporized, and then the vaporized steam flows to the cold end under the action of pressure to be subjected to heat exchange with the external heat exchange mechanism and be liquefied when encountering cold, so that the heat in the ascending pipe is recycled to the external heat exchange mechanism in a circulating manner, the limitation to gas production pressure in the prior art is avoided by adopting an indirect heat exchange mode, and the problems of tearing, water leakage and steam leakage of a welding line are avoided.
On the basis of the technical scheme, the invention can be further improved as follows:
furthermore, an inner liquid absorption core arranged around the ascending pipe is arranged in the heat exchange cavity, and the inner liquid absorption core is used for uniformly absorbing the circulating working medium at the hot end.
By adopting the scheme, the inner liquid absorption core is arranged on the outer wall of the ascending pipe, so that the circulating working medium is uniformly adsorbed on the hot end, the uniform heat exchange of the crude gas in the ascending pipe is ensured, and the tar condensation phenomenon caused by nonuniform temperature is avoided.
Furthermore, an outer liquid absorption core positioned on the inner wall of the sleeve is further arranged in the heat exchange cavity, and a circulating working medium channel is arranged between the outer liquid absorption core and the inner liquid absorption core.
By adopting the scheme, the outer liquid absorption core is additionally arranged on the inner wall of the sleeve, so that the circulating working medium which is liquefied when meeting cold at the cold end is received, and the circulating working medium is guided back to the inner liquid absorption core through the circulating working medium channel, and more efficient and stable heat exchange circulation is formed.
Further, interior imbibition core is cyclic annular even interval arrangement riser outer wall or is netted the cover and is in riser outer wall, outer imbibition core is cyclic annular even interval arrangement sleeve inner wall or is netted the cover sleeve inner wall, be equipped with between interior imbibition core and the outer imbibition core from top to bottom evenly be provided with a plurality of groups cycle working medium passageway, every group cycle working medium passageway is including being radial a plurality of that scatter outwards cycle working medium passageway.
Through adopting above-mentioned scheme, evenly arrange the even heat transfer of raw coke oven gas in the tedge is guaranteed to the interior imbibition core of tedge outer wall, avoids the tar phenomenon of condensing, evenly arranges that the outer imbibition core at intraductal wall effectively improves the adsorption efficiency of the liquefied cycle fluid of cold junction to the maximize leads back liquid cycle fluid to interior imbibition core, guarantees thermal cycle efficiency.
Furthermore, the circulating working medium channel is a capillary liquid absorption core with two ends respectively connected with the outer liquid absorption core and the inner liquid absorption core.
Further, the outer heat exchange mechanism is a spiral pipe arranged around the sleeve, and a heat exchange medium flows in the spiral pipe.
Furthermore, an injection port is formed in the sleeve, the injection port is connected with a heat exchange control mechanism, the heat exchange control mechanism comprises a storage tank, an electromagnetic valve and a pump which are sequentially connected, the circulating working medium is stored in the storage tank, and the pump and the electromagnetic valve are used for adjusting the amount of the circulating working medium in the heat exchange cavity.
By adopting the scheme, the pump injects the circulating working medium into the heat exchange cavity so as to improve the circulating working quality in the heat exchange cavity, and when the pump is closed and the electromagnetic valve is opened, the circulating working medium in the heat exchange cavity flows back to the storage tank under the action of pressure so as to reduce the circulating working quality in the heat exchange cavity.
Furthermore, the temperature control system comprises a controller and a temperature measuring mechanism, wherein the temperature measuring mechanism is arranged in the ascension pipe and used for detecting the gas outlet temperature of the raw coke oven gas, the temperature measuring mechanism is electrically connected with a signal input port of the controller, and a signal output port of the controller is electrically connected with the electromagnetic valve, the pump and the outer heat exchange mechanism.
By adopting the scheme, the quality of the cycle work in the heat exchange cavity and the flow of the outer heat exchange mechanism are controlled by detecting the outlet temperature of the raw coke oven gas, so that the heat absorption capacity is adjusted, the temperature of the raw coke oven gas in the ascending pipe is accurately controlled, the waste heat can be recycled to the maximum, and the wall temperature of the heat pipe can be ensured to be above the tar dew point of the raw coke oven gas, so that the coking problem can not be caused.
Further, the circulating working medium is a potassium simple substance.
The second aspect of the invention provides a control method of the waste heat recovery device of the ascending pipe of the coke oven in the first aspect of the invention, which comprises the following steps:
s1, when the machine is started, the external heat exchange mechanism is opened, the pump and the electromagnetic valve are opened, a certain amount of circulating working medium is injected into the heat exchange cavity, then the pump and the electromagnetic valve are closed, and a raw coke oven gas outlet temperature interval t is preset;
s2, controlling the crude gas to be introduced into the ascending pipe, detecting the outlet gas temperature T2 of the crude gas in real time, and feeding a temperature signal back to the controller, wherein the controller performs the following control according to the temperature signal:
s21, when the temperature T2 is larger than the maximum value of the temperature interval T, controlling the heating flow of the external heat exchange mechanism, and opening a pump and an electromagnetic valve of the heat exchange control mechanism to inject the circulating working medium into the heat exchange cavity;
s22, when the temperature T2 is smaller than the minimum value of the temperature interval T, the external heat exchange mechanism is controlled to reduce the flow, an electromagnetic valve of the heat exchange control mechanism is opened, and the circulating working medium in the heat exchange cavity flows back to the storage tank under the action of pressure;
s23, when the temperature T2 is in the temperature interval T, the external heat exchange mechanism is controlled to keep the flow running, and the electromagnetic valve and the pump of the heat exchange control mechanism are kept in a closed state.
Compared with the prior art, the invention has the beneficial effects that:
1. the waste heat recovery of the raw coke oven gas is realized by adopting an indirect heat exchange mode, the circulating working medium in the heat exchange cavity absorbs heat at the hot end of the outer wall of the ascending tube and is gasified, then the heat exchange is carried out between the cold end of the inner wall of the sleeve and the outer heat exchange mechanism, the circulating working medium is liquefied when meeting cold and returns to the hot end to form circulation, so that the heat in the ascending tube is recycled to the outer heat exchange mechanism, the indirect heat exchange mode is adopted, the limitation to gas production pressure in the prior art is avoided, the problems of tearing, water leakage and steam leakage of a welding line are avoided, a steam-water mixture is prevented from leaking into a carbonization chamber, potential safety hazards are avoided, and the safe operation of a coke oven is ensured;
2. when the gasified circulating working medium exchanges heat with the external heat exchange mechanism on the inner wall of the sleeve, the heat exchange at each position can be ensured to be consistent, the possibility of temperature difference is extremely low, the problem of damage of a spiral pipe of the external heat exchange mechanism in the use process is solved, and because the phase-change heat exchange is adopted, the thermal resistance is very low, the phase-change heat exchange effect is good, and the efficiency is higher;
3. according to the invention, the inner liquid absorption core is arranged on the outer wall of the ascending pipe, so that the liquefied circulating working medium can be uniformly distributed at the hot end, the heat exchange efficiency of each part is ensured to be consistent, the condition of uneven temperature of the crude gas is avoided, and tar condensation is avoided;
4. according to the invention, the internal liquid absorption core on the outer wall of the riser, the external liquid absorption core on the inner wall of the sleeve and the circulating working medium channel arranged between the internal liquid absorption core and the external liquid absorption core greatly accelerate the thermal circulation efficiency of the circulating working medium, meanwhile, the uniformly arranged internal liquid absorption core ensures uniform heat exchange of the raw coke oven gas in the riser, the tar condensation phenomenon is avoided, and the uniformly arranged external liquid absorption core effectively improves the adsorption rate of the circulating working medium liquefied at the cold end, so that the liquid circulating working medium is guided back to the internal liquid absorption core to the maximum extent, and the thermal circulation efficiency is ensured;
5. according to the invention, the quality of the cycle work in the heat exchange cavity and the flow of the external heat exchange mechanism can be accurately adjusted according to the outlet temperature of the raw coke oven gas, and the temperature of the raw coke oven gas in the ascending pipe is accurately controlled, so that the waste heat recovery is maximized, the wall temperature of the heat pipe is ensured to be above the tar dew point of the raw coke oven gas, and the tar condensation phenomenon is effectively avoided.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of a bushing according to an embodiment of the present invention.
Fig. 3 is a schematic top view of a ferrule according to an embodiment of the present invention.
Shown in the figure:
1. a riser pipe;
2. a sleeve;
3. a heat exchange cavity;
4. circulating the working medium;
5. a liquid absorbing core is absorbed;
6. an outer wick;
7. a circulating working medium channel;
8. a spiral tube;
9. a storage tank;
10. an electromagnetic valve;
11. a pump;
12. temperature measuring mechanism.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
As shown in fig. 1-2, the waste heat recovery device for the ascending tube 1 of the coke oven provided by the embodiment includes a sleeve 2 sleeved outside the ascending tube 1, and a sealed heat exchange cavity 3 is formed between the sleeve 2 and the ascending tube 1.
The heat exchange cavity 3 is filled with a circulating working medium 4, the sleeve 2 is sleeved with an outer heat exchange mechanism, the outer heat exchange mechanism is a spiral pipe 8 arranged around the sleeve 2, and a heat exchange medium flows in the spiral pipe 8.
The heat exchange cavity 3 is internally provided with a hot end positioned on the outer side of the outer wall of the ascending pipe 1 and a cold end positioned on the inner side of the inner wall of the sleeve 2, and the circulating working medium 4 absorbs heat and is vaporized at the hot end and then flows to the cold end under the action of pressure to exchange heat with the external heat exchange mechanism and be liquefied to form circulation. The circulating working medium 4 can adopt potassium simple substance.
The circulating working medium 4 absorbs heat at the hot end of the heat exchange cavity 3 to be vaporized, and then the vaporized steam flows to the cold end under the action of pressure to exchange heat with the external heat exchange mechanism to be liquefied when encountering cold, so that the heat in the ascending pipe 1 is recycled to the external heat exchange mechanism in a circulating manner, the limitation to gas production pressure in the prior art is avoided by adopting an indirect heat exchange mode, and the problems of tearing, water leakage and steam leakage of a welding line are avoided.
Specifically, in this embodiment, an inner liquid absorption core 5 disposed around the rising pipe 1 is disposed in the heat exchange cavity 3, and the inner liquid absorption core 5 is used to uniformly absorb the cycle fluid 4 at the hot end.
An inner liquid absorption core 5 is arranged on the outer wall of the ascending pipe 1, so that the circulating working medium 4 is uniformly absorbed on the hot end, the uniform heat exchange of the crude gas in the ascending pipe 1 is ensured, and the tar condensation phenomenon caused by nonuniform temperature is avoided.
An outer liquid absorption core 6 positioned on the inner wall of the sleeve 2 is also arranged in the heat exchange cavity 3, and a circulating working medium channel 7 is arranged between the outer liquid absorption core 6 and the inner liquid absorption core 5.
An outer liquid absorption core 6 is additionally arranged on the inner wall of the sleeve 2, so that the circulating working medium 4 liquefied when meeting cold is received at the cold end, and the circulating working medium 4 is guided back to the inner liquid absorption core 5 through a circulating working medium channel 7, thereby forming more efficient and stable heat exchange circulation.
The inner liquid absorption cores 5 are uniformly and annularly arranged on the outer wall of the ascending pipe 1 at intervals, and the outer liquid absorption cores 6 are uniformly and annularly arranged on the inner wall of the sleeve 2 at intervals; a plurality of groups of circulation working medium channels 7 are uniformly arranged between the inner liquid absorbing core 5 and the outer liquid absorbing core 6 from top to bottom, and each group of circulation working medium channels 7 comprises four circulation working medium channels 7 which are radially and outwards scattered.
The liquid absorption cores 5 in a plurality of circles which are uniformly arranged guarantee the uniform heat exchange of the raw coke oven gas in the ascending pipe 1, the tar condensation phenomenon is avoided, the liquid absorption cores 6 outside the circles which are uniformly arranged effectively improve the adsorption rate of the cold end liquefied circulating working medium 4, so that the liquid circulating working medium 4 is guided back to the liquid absorption cores 5 to the maximum, and the thermal cycle efficiency is guaranteed.
The inner liquid absorption core 5 and the outer liquid absorption core 6 also adopt a net structure and respectively cover the outer wall of the ascending pipe 1 and the inner wall of the sleeve 2, so that uniform heat exchange is ensured, and the heat circulation efficiency is improved.
The circulating working medium channel 7 is a capillary liquid absorption core with two ends respectively connected with the outer liquid absorption core 6 and the inner liquid absorption core 5.
The sleeve 2 is provided with an injection port, the injection port is connected with a heat exchange control mechanism, the heat exchange control mechanism comprises a storage tank 9, an electromagnetic valve 10 and a pump 11 which are sequentially connected, the storage tank 9 is internally stored with a circulating working medium 4, and the pump 11 and the electromagnetic valve 10 are used for adjusting the amount of the circulating working medium 4 in the heat exchange cavity 3.
The pump 11 injects the circulating working medium 4 into the heat exchange cavity 3 to improve the amount of the circulating working medium 4 in the heat exchange cavity 3, and when the pump 11 is closed and the electromagnetic valve 10 is opened, the circulating working medium 4 in the heat exchange cavity 3 flows back to the storage tank 9 under the action of pressure to reduce the amount of the circulating working medium 4 in the heat exchange cavity 3.
The device further comprises a temperature control system, the temperature control system comprises a controller and a temperature measuring mechanism 12, the temperature measuring mechanism 12 is specifically a thermocouple and is arranged in the ascending pipe 1 and used for detecting the gas outlet temperature of the raw coke oven gas, the temperature measuring mechanism is electrically connected with a signal input port of the controller, and a signal output port of the controller is electrically connected with the electromagnetic valve 10, the pump 11 and the outer heat exchanging mechanism.
The quantity of the circulating working medium 4 in the heat exchange cavity 3 and the flow of the external heat exchange mechanism are controlled by detecting the outlet temperature of the raw coke oven gas, so that the heat absorption capacity is adjusted, the temperature of the raw coke oven gas in the ascending pipe 1 is accurately controlled, the waste heat recovery is maximized, and the wall temperature of the heat pipe is ensured to be above the tar dew point of the raw coke oven gas, so that the coking problem is avoided.
The control method of the waste heat recovery device of the coke oven ascending pipe 1 comprises the following steps:
s1, when the machine is started, the external heat exchange mechanism is opened, the pump 11 and the electromagnetic valve 10 are opened, a certain amount of circulating working medium 4 is injected into the heat exchange cavity 3, then the pump 11 and the electromagnetic valve 10 are closed, and a raw coke oven gas outlet temperature interval t is preset;
s2, controlling the crude gas to be introduced into the ascending pipe 1, detecting the outlet gas temperature T2 of the crude gas in real time, feeding a temperature signal back to the controller, and controlling the controller according to the temperature signal as follows:
s21, when the temperature T2 is larger than the maximum value of the temperature interval T, controlling the heating flow of the external heat exchange mechanism, and opening the pump 11 and the electromagnetic valve 10 of the heat exchange control mechanism to inject the circulating working medium 4 into the heat exchange cavity 3;
s22, when the temperature T2 is smaller than the minimum value of the temperature interval T, controlling the external heat exchange mechanism to reduce the flow, opening the electromagnetic valve 10 of the heat exchange control mechanism, and enabling the circulating working medium 4 in the heat exchange cavity 3 to reversely flow into the storage tank 9 under the action of pressure;
s23 controls the external heat exchange mechanism to keep the flow operation when the temperature T2 is in the temperature interval T, and keeps the electromagnetic valve 10 and the pump 11 of the heat exchange control mechanism in a closed state.
In the embodiment, the waste heat recovery of the raw coke oven gas is realized by adopting an indirect heat exchange mode, the circulating working medium 4 in the heat exchange cavity 3 absorbs heat at the hot end of the outer wall of the ascending pipe 1 to be gasified, then the heat exchange is carried out between the cold end of the inner wall of the sleeve 2 and the external heat exchange mechanism, and the circulating working medium 4 is liquefied when meeting cold and returns to the hot end to form circulation, so that the heat in the ascending pipe 1 is recycled to the external heat exchange mechanism in a circulating manner;
when the inner wall of the sleeve 2 exchanges heat with the external heat exchange mechanism, the gasified circulating working medium 4 can ensure the consistency of heat exchanged at each position, the possibility of temperature difference is extremely low, the problem of damage of the spiral pipe 8 of the external heat exchange mechanism in the use process is solved, and because the phase-change heat exchange is adopted, the thermal resistance is very low, the phase-change heat exchange effect is good, and the efficiency is higher;
in the embodiment, the inner liquid absorption core 5 is arranged on the outer wall of the ascending pipe 1, so that the liquefied circulating working medium 4 can be uniformly distributed on the hot end, the heat exchange efficiency of each part is consistent, the condition that the temperature of the raw coke oven gas is uneven is avoided, and tar condensation is avoided;
in the embodiment, the thermal cycle efficiency of the cycle fluid 4 is greatly accelerated through the inner fluid absorption core 5 on the outer wall of the riser 1, the outer fluid absorption core 6 on the inner wall of the sleeve 2 and the cycle fluid channel 7 arranged between the inner fluid absorption core 5 and the outer fluid absorption core 6, meanwhile, the uniform heat exchange of the crude gas in the riser 1 is ensured by the plurality of circles of inner fluid absorption cores 5 which are uniformly arranged at intervals, the tar condensation phenomenon is avoided, and the adsorption rate of the cycle fluid 4 liquefied at the cold end is effectively improved by the plurality of circles of outer fluid absorption cores 6 which are uniformly arranged at intervals, so that the liquid cycle fluid 4 is guided back to the inner fluid absorption core 5 to the maximum extent, and the thermal cycle efficiency is ensured;
according to the embodiment, the quantity of the circulating working medium 4 in the heat exchange cavity 3 and the flow of the external heat exchange mechanism can be accurately adjusted according to the outlet temperature of the raw coke oven gas, the temperature of the raw coke oven gas in the ascending pipe 1 is accurately controlled, the waste heat can be recycled to the maximum, the wall temperature of the heat pipe can be ensured to be above the tar dew point of the raw coke oven gas, and the tar condensation phenomenon is effectively avoided.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The waste heat recovery device for the ascending tube of the coke oven is characterized by comprising a sleeve which is sleeved outside the ascending tube, a sealed heat exchange cavity is formed between the sleeve and the ascending tube, a circulating working medium is filled in the heat exchange cavity, an outer heat exchange mechanism is sleeved outside the sleeve, a hot end which is positioned on the outer side of the outer wall of the ascending tube and a cold end which is positioned on the inner side of the inner wall of the sleeve are arranged in the heat exchange cavity, the circulating working medium is vaporized by absorbing heat at the hot end, and then flows to the cold end and is liquefied by heat exchange of the outer heat exchange mechanism under the action of pressure to form circulation.
2. The coke oven riser pipe waste heat recovery device of claim 1, wherein an inner liquid absorption core is arranged in the heat exchange cavity and surrounds the riser pipe, and the inner liquid absorption core is used for uniformly absorbing the circulating working medium on the hot end.
3. The coke oven riser pipe waste heat recovery device of claim 2, wherein an outer liquid suction core is further disposed in the heat exchange cavity and located on the inner wall of the sleeve, and a circulating working medium channel is disposed between the outer liquid suction core and the inner liquid suction core.
4. The coke oven riser pipe waste heat recovery device as claimed in claim 3, wherein the inner liquid-absorbing cores are annularly and uniformly arranged on the outer wall of the riser pipe at intervals or are covered on the outer wall of the riser pipe in a net shape, the outer liquid-absorbing cores are annularly and uniformly arranged on the inner wall of the sleeve pipe at intervals or are covered on the inner wall of the sleeve pipe in a net shape, a plurality of groups of circulating medium channels are uniformly arranged between the inner liquid-absorbing cores and the outer liquid-absorbing cores from top to bottom, and each group of circulating medium channels comprises a plurality of circulating medium channels which are radially and outwardly scattered.
5. The coke oven riser pipe waste heat recovery device of claim 4, wherein the circulating working medium channel is a capillary wick having two ends respectively connected to the outer and inner liquid-absorbing cores.
6. The coke oven riser pipe waste heat recovery device of claim 1, wherein the external heat exchange mechanism is a spiral pipe arranged around the sleeve, and a heat exchange medium flows in the spiral pipe.
7. The coke oven riser waste heat recovery device of claim 1, wherein the sleeve is provided with an injection port, the injection port is connected with a heat exchange control mechanism, the heat exchange control mechanism comprises a storage tank, an electromagnetic valve and a pump which are sequentially connected, the circulating medium is stored in the storage tank, and the pump and the electromagnetic valve are used for adjusting the amount of the circulating medium in the heat exchange cavity.
8. The coke oven ascension pipe waste heat recovery device of claim 7, further comprising a temperature control system, wherein the temperature control system comprises a controller and a temperature measuring mechanism, the temperature measuring mechanism is arranged inside the ascension pipe and used for detecting the outlet gas temperature of the raw coke oven gas, the temperature measuring mechanism is electrically connected with a signal input port of the controller, and a signal output port of the controller is electrically connected with the electromagnetic valve, the pump and the external heat exchange mechanism.
9. The coke oven riser waste heat recovery device of any one of claims 1 to 8, wherein the cycle fluid is elemental potassium.
10. The control method for the waste heat recovery device of the ascending tube of the coke oven as claimed in claim 8 or 9, characterized by comprising the following steps:
s1, when the machine is started, the external heat exchange mechanism is opened, the pump and the electromagnetic valve are opened, a certain amount of circulating working medium is injected into the heat exchange cavity, then the pump and the electromagnetic valve are closed, and a raw coke oven gas outlet temperature interval t is preset;
s2, controlling the crude gas to be introduced into the ascending pipe, detecting the outlet gas temperature T2 of the crude gas in real time, and feeding a temperature signal back to the controller, wherein the controller performs the following control according to the temperature signal:
s21, when the temperature T2 is larger than the maximum value of the temperature interval T, controlling the heating flow of the external heat exchange mechanism, and opening a pump and an electromagnetic valve of the heat exchange control mechanism to inject the circulating working medium into the heat exchange cavity;
s22, when the temperature T2 is smaller than the minimum value of the temperature interval T, the external heat exchange mechanism is controlled to reduce the flow, an electromagnetic valve of the heat exchange control mechanism is opened, and the circulating working medium in the heat exchange cavity flows back to the storage tank under the action of pressure;
s23, when the temperature T2 is in the temperature interval T, the external heat exchange mechanism is controlled to keep the flow, and the electromagnetic valve and the pump of the heat exchange control mechanism are kept in a closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111479199.7A CN114164009A (en) | 2021-12-06 | 2021-12-06 | Coke oven riser waste heat recovery device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111479199.7A CN114164009A (en) | 2021-12-06 | 2021-12-06 | Coke oven riser waste heat recovery device and control method thereof |
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| CN114164009A true CN114164009A (en) | 2022-03-11 |
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| CN202111479199.7A Pending CN114164009A (en) | 2021-12-06 | 2021-12-06 | Coke oven riser waste heat recovery device and control method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR645156A (en) * | 1926-12-14 | 1928-10-20 | Barrett Co | Method and apparatus for the distillation of tar |
| JPS61167429A (en) * | 1985-01-21 | 1986-07-29 | Rozai Kogyo Kk | Regenerating method of liquid moisture-absorbent in air-conditioning equipment |
| JP2005336231A (en) * | 2004-05-24 | 2005-12-08 | Jfe Steel Kk | Method for recovery of sensible heat of coke oven gas |
| CN1840984A (en) * | 2005-03-28 | 2006-10-04 | 潘戈 | Buried reflux casing type circulating geothermal heat exchanger and use thereof |
| CN204572146U (en) * | 2015-02-04 | 2015-08-19 | 山东大学 | The exhaust gas heat recovering device that a kind of heat exchange amount is controlled |
| CN204737916U (en) * | 2015-04-29 | 2015-11-04 | 北京中矿艾可沃特科技有限公司 | A heat reclamation device for coke oven tedge |
| CN208562267U (en) * | 2018-07-23 | 2019-03-01 | 江苏中天能源设备有限公司 | A kind of raw coke oven gas step recycling coal tar oil system |
| CN211734257U (en) * | 2020-03-16 | 2020-10-23 | 武汉方特工业设备技术有限公司 | Coke oven riser anti-coking constant wall temperature heat exchanger |
| CN216837801U (en) * | 2021-12-06 | 2022-06-28 | 江苏中天能源设备有限公司 | Coke oven tedge waste heat recovery device |
-
2021
- 2021-12-06 CN CN202111479199.7A patent/CN114164009A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR645156A (en) * | 1926-12-14 | 1928-10-20 | Barrett Co | Method and apparatus for the distillation of tar |
| JPS61167429A (en) * | 1985-01-21 | 1986-07-29 | Rozai Kogyo Kk | Regenerating method of liquid moisture-absorbent in air-conditioning equipment |
| JP2005336231A (en) * | 2004-05-24 | 2005-12-08 | Jfe Steel Kk | Method for recovery of sensible heat of coke oven gas |
| CN1840984A (en) * | 2005-03-28 | 2006-10-04 | 潘戈 | Buried reflux casing type circulating geothermal heat exchanger and use thereof |
| CN204572146U (en) * | 2015-02-04 | 2015-08-19 | 山东大学 | The exhaust gas heat recovering device that a kind of heat exchange amount is controlled |
| CN204737916U (en) * | 2015-04-29 | 2015-11-04 | 北京中矿艾可沃特科技有限公司 | A heat reclamation device for coke oven tedge |
| CN208562267U (en) * | 2018-07-23 | 2019-03-01 | 江苏中天能源设备有限公司 | A kind of raw coke oven gas step recycling coal tar oil system |
| CN211734257U (en) * | 2020-03-16 | 2020-10-23 | 武汉方特工业设备技术有限公司 | Coke oven riser anti-coking constant wall temperature heat exchanger |
| CN216837801U (en) * | 2021-12-06 | 2022-06-28 | 江苏中天能源设备有限公司 | Coke oven tedge waste heat recovery device |
Non-Patent Citations (3)
| Title |
|---|
| 张晓晖;刘大为;: "燃气锅炉排烟冷凝热回收技术", 工业锅炉, no. 04 * |
| 曹先常;程乐意;刘咏梅;: "焦炉荒煤气显热回收技术现状分析及试验研究", 冶金能源, vol. 36, no. 01 * |
| 董仁杰等: "太阳能热利用工程", 中国农业科技出版社, pages: 95 * |
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