Efficient and energy-saving macromolecule cracking system

Abstract

The utility model relates to the technical field of macromolecular cracking, in particular to a high-efficiency and energy-saving macromolecular cracking system, and solves the problems that energy is wasted, the retention time of hot air in a cracker is short, the heat transfer efficiency is low and the energy consumption is low in the heating process of a traditional hot blast stove when a macromolecular material is cracked in the prior art. The hot blast stove comprises a hot blast stove body and a cracker, a hot air circulating pipeline is installed between the hot blast stove body and the cracker, the hot blast stove body is composed of a combustion ventilation mechanism and an isolation heat storage mechanism, and the isolation heat storage mechanism is located in the combustion ventilation mechanism. And the cracker consists of a reflux cracking mechanism and a shunt warming mechanism. Hot air needed in the macromolecule cracking process is spirally conveyed twice, uniform temperature distribution can be promoted, the heat energy transmission efficiency is improved, waste heat can be conveniently utilized, and the energy-saving effect of the hot blast stove is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to high polymer cracking technical field, concretely is high -efficient energy -conserving high polymer cracking system. BACKGROUND

[0002] The main role of the static cracker is to decompose large structures or samples into small pieces for easy transportation, processing or subsequent analysis. Its principle is to use external force or energy to break the internal connection of the structure or sample, so as to achieve the purpose of cracking. The cracker uses high temperature to rapidly decompose organic matter in the sample to generate small molecular compounds for subsequent qualitative and quantitative analysis. This method has a wide application in the field of organic matter analysis.

[0003] When cracking high molecular materials, a hot blast furnace needs to be installed at the hot gas input end of the cracker. The hot blast furnace is a thermal power machine that has been widely used in China since the late 1970s. It has become a replacement product for electric heat sources and traditional steam power heat sources in many industries. The hot blast furnace has various types and series, and can be divided into hand-burning and machine-burning types according to the coal addition method, and coal, oil, and gas furnaces according to the fuel type. Under normal circumstances, one of the main functions of the hot blast furnace is to provide heat for the cracker.

[0004] When cracking high molecular materials, the traditional hot blast furnace loses a large amount of heat during the heating process, resulting in energy waste. The hot air stays in the cracker for a short time, resulting in low heat transfer efficiency. A large amount of heat is not fully utilized, which is not conducive to energy saving. Therefore, the existing needs are not met, and the high-efficiency energy-saving high polymer cracking system is proposed. SUMMARY

[0005] The utility model aims at providing high -efficient energy -conserving high polymer cracking system, to solve the problem that the existing high molecular material cracking, traditional hot blast furnace in the heating process, a large amount of heat loss, resulting in energy waste, hot air in the cracker's residence time is shorter, resulting in low heat transfer efficiency, a large amount of heat is not fully utilized, which is not conducive to energy saving effect.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: High -efficient energy -conserving macromolecular cracking system, including hot blast furnace and cracker, the hot blast furnace is installed with hot blast circulation pipeline between cracker, the hot blast furnace is composed of combustion ventilation mechanism and isolated heat storage mechanism, the isolated heat storage mechanism is located in the inside of combustion ventilation mechanism, the cracker is composed of backflow cracking mechanism and shunt temperature increasing mechanism, the shunt temperature increasing mechanism is located in the inside of backflow cracking mechanism, the isolated heat storage mechanism includes the partition cover, the inside installation of partition cover has temperature insulation layer, the partition cover is fixedly connected with temperature insulation layer through a plurality of partition support frame, a plurality of single body splicing rings are fixedly installed in the inside of temperature insulation layer, the inside of a plurality of single body splicing rings forms a combustion chamber, the inside of combustion chamber is equipped with high temperature area and low temperature area, is installed with heat accumulator between high temperature area and low temperature area,

[0007] The backflow cracking mechanism includes an outer layer waste heat isolation cover, an inner layer waste heat isolation cover is installed on the inner side of the outer layer waste heat isolation cover, a plurality of waste heat guide spiral strips are fixedly installed between the outer layer waste heat isolation cover and the inner layer waste heat isolation cover, a backflow output pipe is fixedly installed on one side of the outer layer waste heat isolation cover, the shunt temperature increasing mechanism includes a hot air input pipe, a hot air shunt box is fixedly installed at one end of the hot air input pipe, a plurality of hot air guide pipes are fixedly installed at one end of the hot air shunt box, a hot air reversing pipe is installed on the outer side of the hot air guide pipe, and a hot air guide spiral strip is arranged between the hot air guide pipe and the hot air reversing pipe.

[0008] Preferably, the combustion ventilation mechanism includes a hot air shell, the hot air shell is fixedly connected with the partition cover, a combustion machine is fixedly installed at the rear end of the hot air shell, gas injection lances are fixedly installed on both sides of the combustion machine, a backflow box is fixedly installed on one side of the hot air shell, a backflow fan is fixedly installed at the rear end surface of the backflow box, a backflow input pipe is fixedly installed at the front end of the backflow box, a first hot air conveying pipe is fixedly installed at the front end of the hot air shell, a second hot air conveying pipe is fixedly installed on one side of the first hot air conveying pipe, a cold air input pipe is fixedly installed on the other side of the first hot air conveying pipe, a cold air conveying fan is fixedly installed at the end of the cold air input pipe away from the first hot air conveying pipe, and pneumatic valves are fixedly arranged between the backflow box and the backflow input pipe, the first hot air conveying pipe and the second hot air conveying pipe, and the cold air input pipe and the cold air conveying fan.

[0009] Preferably, the backflow cracking mechanism further includes a cracking installation shell fixedly connected with the outer layer waste heat isolation cover, a plurality of exhaust ends are fixedly installed between the cracking installation shell and the outer layer waste heat isolation cover, an input installation cover is fixedly installed at the rear end of the cracking installation shell, a plugging gate plate is installed at the front end of the cracking installation shell, and a sealing air guide seat is fixedly installed between the input installation cover and the inner layer waste heat isolation cover.

[0010] Preferably, the bottom ends of the two gas injection lances are inserted into the interior of the combustion chamber through the hot air shell, the return input pipe is connected to the combustion chamber through the return box, the output ends of the return fan and the cold air delivery fan are fixedly provided with blades, the return input pipe is connected to the return output pipe through the hot air circulation pipeline, the hot air circulation pipeline is fixedly connected to the upper end of the second hot air delivery pipe, the rear end of the hot air circulation pipeline is provided with a plurality of cracking interfaces, and the second hot air delivery pipe is connected to the plurality of cracking interfaces through the hot air circulation pipeline.

[0011] Preferably, the cold air input pipe is connected to the second hot air delivery pipe through the first hot air delivery pipe, the rear end of the first hot air delivery pipe is inserted into the interior of the combustion chamber through the hot air shell, the first hot air delivery pipe is connected to the low-temperature zone, the plurality of single splicing rings are linearly arranged along the axis of the heat storage body, the heat storage body is fixedly connected to the single splicing ring, the high-temperature zone is located between the combustion machine and the heat storage body, the temperature in the high-temperature zone is 1000 DEG C, and the temperature in the low-temperature zone is 700 DEG C.

[0012] Preferably, the front end of the first hot air delivery pipe is fixedly connected to the hot air input pipe, the first hot air delivery pipe is fixedly connected to the hot air distribution box through the hot air input pipe, the input mounting cover is fixedly connected to the hot air distribution box, and the hot air distribution box is used for delivering hot air and distributing the hot air into the interiors of the plurality of hot air guide pipes.

[0013] Preferably, the cracking mounting shell is fixedly connected to the plurality of hot air reversing pipes, the hot air guide pipe is coaxial with the hot air reversing pipe, the hot air guide pipe is fixedly connected to the hot air guide spiral strip, the direction of the hot air flow in the interior of the hot air guide pipe is opposite to the direction of the hot air flow between the hot air guide pipe and the hot air reversing pipe, and the sealing air guide seat is connected to the plurality of hot air reversing pipes.

[0014] Preferably, the sealing air guide seat is connected between the outer layer waste heat isolation cover and the inner layer waste heat isolation cover, the front end of the return output pipe is inserted between the outer layer waste heat isolation cover and the inner layer waste heat isolation cover through the cracking mounting shell, the temperature in the return output pipe is 330 DEG C, the outer layer waste heat isolation cover and the inner layer waste heat isolation cover are fixedly connected through the plurality of waste heat guide spiral strips, the inner side of the inner layer waste heat isolation cover is provided with a cracking chamber, and the bottom end of the exhaust end is sequentially inserted into the interior of the cracking chamber through the cracking mounting shell, the outer layer waste heat isolation cover and the inner layer waste heat isolation cover.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The utility model discloses a heat storage body is installed in the combustion chamber, make through the heat storage body can divide the combustion chamber into high temperature area and low temperature area, further through the multiple array arrangement's through -hole that the heat storage body surface is equipped with can carry out sufficient combustion to harmful gas, realize the accurate control to the hot gas temperature that first hot -blast delivery pipe exports, ensure the efficient operation of cracking process, a plurality of cracking interfaces are equipped with in the rear end of hot -blast circulating pipeline, through cracking interface can be connected to a plurality of cracker, and further the hot -blast furnace can synchronously supply hot -blast to a plurality of cracker through hot -blast circulating pipeline, realize a plurality of cracker synchronous cracking operation to high polymer material,

[0017] 2. The utility model discloses through the hot -blast shunt box to the inside of a plurality of hot -blast guide tubes of hot gas even shunt, through the hot -blast guide tube to the first -level heat transfer of hot -blast simultaneously through the hot -blast reversing pipe can be reversed to hot -blast, realize the hot gas under the helical guide effect of hot -blast guide pipe through hot -blast reversing pipe increases the residence time and contact area in the hot -blast delivery process, promote temperature even distribution, improve the heat transfer efficiency, further can carry out stable static cracking to the high polymer material in cracking chamber, and the outer layer waste heat isolation cover and the inner layer waste heat isolation cover can further waste heat utilization to hot -blast through a plurality of waste heat guide spiral strips, reduce the local overheating or cold spot phenomenon existing in cracking chamber, ensure that heating process is more uniform;

[0018] 3. The utility model discloses through the backflow fan can be in turn through backflow input pipe, hot -blast circulating pipeline and backflow output pipe and make the hot air after cracking backflow to the combustion chamber, can further improve the utilization of waste heat in hot gas, and convenient for the heat preservation operation to cracker, improve the heat utilization rate in hot -blast, convenient for reducing the combustion intensity and the use amount of burning material in combustion chamber simultaneously, more energy -efficient, and the cold -blast delivery fan is through cold -blast input pipe and sends the outside cold gas to the inside of first hot -blast delivery pipe, further first hot -blast delivery pipe is through hot -blast input pipe and hot -blast shunt box and inputs cold gas, realizes the quick and stable cooling operation of cracking chamber. ACCURACY

[0019] Figure 1 It is the overall structure schematic view of the utility model;

[0020] Figure 2 It is the structure schematic view of the hot -blast furnace of the utility model;

[0021] Figure 3 It is the plan view of the hot -blast furnace of the utility model;

[0022] Figure 4 It is the section structure schematic view of the hot -blast furnace of the utility model;

[0023] Figure 5 It is the section structure schematic view of the isolation heat storage mechanism of the utility model;

[0024] Figure 6 It is a structure schematic view of the present utility model pyrolyzer;

[0025] Figure 7 It is a structure schematic view of the present utility model backflow output pipe installation;

[0026] Figure 8 It is a structure schematic view of the present utility model waste heat guide spiral strip installation;

[0027] Figure 9 It is a structure schematic view of the present utility model shunt temperature increasing mechanism installation;

[0028] Figure 10 It is a structure schematic view of the present utility model shunt temperature increasing mechanism section;

[0029] In the figure: 1, hot blast stove;2, combustion ventilation mechanism;201, combustion machine;202, hot blast shell;203, gas injection lance;204, backflow fan;205, backflow box;206, backflow input pipe;207, first hot blast conveying pipe;208, second hot blast conveying pipe;209, cold blast input pipe;210, cold blast conveying fan;211, pneumatic valve;3, isolation heat storage mechanism;301, partition cover;302, partition support frame;303, temperature insulation layer;304, single body splicing ring;305, high temperature zone;306, low temperature zone;307, heat storage body;4, pyrolyzer;5, backflow pyrolysis mechanism;501, pyrolysis installation shell;502, input installation cover;503, exhaust end;504, backflow output pipe;505, outer layer waste heat isolation cover;506, inner layer waste heat isolation cover;507, waste heat guide spiral strip;508, plugging gate;509, sealing gas guide seat;6, shunt temperature increasing mechanism;601, hot blast input pipe;602, hot blast shunt box;603, hot blast reversing pipe;604, hot blast guide pipe;605, hot blast guide spiral strip;7, hot blast circulating pipeline. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments.

[0031] Please refer to Figure 1 , Figure 4 and Figure 6The utility model provides an embodiment: high polymer cracking system of high efficiency and energy saving, including hot blast furnace 1 and cracker 4, is installed between hot blast furnace 1 and cracker 4 hot -blast circulating pipeline 7, hot blast furnace 1 is by combustion ventilation mechanism 2 and isolation heat storage mechanism 3 is formed, and isolation heat storage mechanism 3 is located inside combustion ventilation mechanism 2, and cracker 4 is by backflow cracking mechanism 5 and shunt temperature increasing mechanism 6 is formed, and shunt temperature increasing mechanism 6 is located inside backflow cracking mechanism 5, and the hot gas needed for high polymer cracking process is carried out twice spiral delivery through cracker 4, can promote temperature uniform distribution, improve heat transfer efficiency, and convenient for the utilization of waste heat, improve the energy saving effect of hot blast furnace 1.

[0032] Please refer to Figure 4 And Figure 5 Isolation heat storage mechanism 3 includes the partition cover 301, the inside installation of partition cover 301 has the temperature insulation layer 303, and the partition cover 301 is fixedly connected with temperature insulation layer 303 through a plurality of partition support frames 302, a plurality of monomer splicing rings 304 are fixedly installed in the inside of temperature insulation layer 303, the inside of the combustion chamber is formed in a plurality of monomer splicing rings 304, the inside of the combustion chamber is equipped with high temperature zone 305 and low temperature zone 306, the temperature in high temperature zone 305 is 1000 degrees Celsius, the temperature in low temperature zone 306 is 700 degrees Celsius, and heat accumulator 307 is installed between high temperature zone 305 and low temperature zone 306, and high temperature zone 305 is located between combustion engine 201 and heat accumulator 307, a plurality of monomer splicing rings 304 are linearly arranged along the axis of heat accumulator 307, heat accumulator 307 is fixedly connected with monomer splicing ring 304, a plurality of arrayed through holes provided on the surface of heat accumulator 307 can fully burn harmful gases, realize accurate control of the temperature of the hot gas output by the first hot air delivery pipe 207, and ensure the efficient performance of the cracking process.

[0033] Please refer to Figures 2 to 4 Combustion ventilation mechanism 2 includes hot blast shell body 202, and hot blast shell body 202 is fixedly connected with partition cover 301, and the rear end of hot blast shell body 202 is fixedly installed with combustion engine 201, and the both sides of combustion engine 201 are fixedly installed with injection gas lance 203, and the bottom end of the two injection gas lances 203 penetrates hot blast shell body 202 and is inserted into the inside of the combustion chamber, and one side of hot blast shell body 202 is fixedly installed with backflow tank 205, and the rear end surface of backflow tank 205 is fixedly installed with backflow fan 204, and the front end of backflow tank 205 is fixedly installed with backflow input pipe 206, and backflow input pipe 206 is connected with the combustion chamber through backflow tank 205, so that backflow fan 204 can flow back to the combustion chamber through backflow input pipe 206 under the support of backflow tank 205, which can further improve the utilization of waste heat in hot gas.

[0034] The front end of the hot air shell 202 is fixedly installed with a first hot air conveying pipe 207, the rear end of the first hot air conveying pipe 207 penetrates the hot air shell 202 and is inserted into the inner side of the combustion chamber, the first hot air conveying pipe 207 is in through connection with the low-temperature area 306, one side of the first hot air conveying pipe 207 is fixedly installed with a second hot air conveying pipe 208, the hot air circulating pipeline 7 is fixedly connected with the upper end of the second hot air conveying pipe 208, the rear end of the hot air circulating pipeline 7 is provided with a plurality of cracking interfaces, the second hot air conveying pipe 208 is in through connection with the plurality of cracking interfaces through the hot air circulating pipeline 7, the plurality of cracking devices 4 can be communicated through the cracking interfaces, and then the hot blast stove 1 can synchronously supply hot air to the plurality of cracking devices 4 through the hot air circulating pipeline 7, so that the cracking operation of the plurality of cracking devices 4 on the high molecular material is realized synchronously;

[0035] The other side of the first hot air conveying pipe 207 is fixedly installed with a cold air input pipe 209, the cold air input pipe 209 is in through connection with the second hot air conveying pipe 208 through the first hot air conveying pipe 207, one end of the cold air input pipe 209 away from the first hot air conveying pipe 207 is fixedly installed with a cold air conveying fan 210, the output ends of the backflow fan 204 and the cold air conveying fan 210 are both fixedly provided with blades, the backflow box 205 is fixedly provided with pneumatic valves 211 between the backflow input pipe 206, the first hot air conveying pipe 207 and the second hot air conveying pipe 208 and the cold air input pipe 209 and the cold air conveying fan 210, so that the cold air conveying fan 210 inputs cold air through the cold air input pipe 209, the first hot air conveying pipe 207, the hot air input pipe 601 and the hot air distribution box 602, and realizes the rapid and stable cooling operation of the cracking chamber.

[0036] Please refer to Figures 6 to 9 The backflow cracking mechanism 5 comprises an outer layer waste heat isolation cover 505, the inner side of the outer layer waste heat isolation cover 505 is installed with an inner layer waste heat isolation cover 506, the inside of the inner layer waste heat isolation cover 506 is provided with a cracking chamber, the outer side of the outer layer waste heat isolation cover 505 is fixedly installed with a cracking installation shell 501, one side of the outer layer waste heat isolation cover 505 is fixedly installed with a backflow output pipe 504, the front end of the backflow output pipe 504 penetrates the cracking installation shell 501 and is inserted between the outer layer waste heat isolation cover 505 and the inner layer waste heat isolation cover 506, the temperature in the backflow output pipe 504 is 330 degrees Celsius, a plurality of waste heat guide spiral strips 507 are fixedly installed between the outer layer waste heat isolation cover 505 and the inner layer waste heat isolation cover 506, the outer layer waste heat isolation cover 505 and the inner layer waste heat isolation cover 506 are fixedly connected through the plurality of waste heat guide spiral strips 507, the backflow input pipe 206 and the backflow output pipe 504 are in through connection through the hot air circulating pipeline 7, the outer layer waste heat isolation cover 505 and the inner layer waste heat isolation cover 506 can further utilize the waste heat of the hot air through the plurality of waste heat guide spiral strips 507, so as to reduce the local overheating or cold spot phenomenon in the cracking chamber and ensure that the heating process is more uniform.

[0037] A plurality of exhaust ends 503 are fixedly installed between the cracking mounting shell 501 and the outer layer waste heat isolation cover 505, the bottom end of the exhaust end 503 penetrates the cracking mounting shell 501, the outer layer waste heat isolation cover 505 and the inner layer waste heat isolation cover 506 in turn and is inserted into the inner side of the cracking chamber, the rear end of the cracking mounting shell 501 is fixedly installed with an input mounting cover 502, the front end of the cracking mounting shell 501 is installed with a blocking gate plate 508, a sealing air guide seat 509 is fixedly installed between the input mounting cover 502 and the inner layer waste heat isolation cover 506, the sealing air guide seat 509 is connected through between the outer layer waste heat isolation cover 505 and the inner layer waste heat isolation cover 506, and the sealing air guide seat 509 collects and then divides the flow to the inner side of the outer layer waste heat isolation cover 505 and the inner layer waste heat isolation cover 506.

[0038] Please refer to Figure 6 , Figure 9 and Figure 10 , the shunt temperature increasing mechanism 6 includes a hot air input pipe 601, the front end of the first hot air conveying pipe 207 is fixedly connected with the hot air input pipe 601, one end of the hot air input pipe 601 is fixedly installed with a hot air shunt box 602, the first hot air conveying pipe 207 is fixedly connected with the hot air shunt box 602 through the hot air input pipe 601, the input mounting cover 502 is fixedly connected with the hot air shunt box 602, one end of the hot air shunt box 602 is fixedly installed with a plurality of hot air guide pipes 604, the hot air shunt box 602 is used for conveying hot air and dividing the flow to the inside of the plurality of hot air guide pipes 604, the outside of the hot air guide pipe 604 is installed with a hot air reversing pipe 603, the sealing air guide seat 509 is connected through with the plurality of hot air reversing pipes 603, the cracking mounting shell 501 is fixedly connected with the plurality of hot air reversing pipes 603, the hot air guide pipe 604 is coaxial with the hot air reversing pipe 603, the hot air flow direction inside the hot air guide pipe 604 and the hot air flow direction between the hot air guide pipe 604 and the hot air reversing pipe 603 are opposite, the hot air guide spiral strip 605 is arranged between the hot air guide pipe 604 and the hot air reversing pipe 603, the hot air guide pipe 604 is fixedly connected with the hot air guide spiral strip 605, the hot air can be reversed through the hot air reversing pipe 603, the hot air conveying process is increased in the residence time and the contact area under the action of the spiral guiding of the hot air in the hot air guide pipe 604, the temperature uniform distribution is promoted, and the heat transfer efficiency is improved.

[0039] Working principle: when the polymer material is cracked, the polymer material is placed in the cracking chamber provided in the inner layer of the waste heat isolation cover 506 through the exhaust end 503, the power is turned on, and the oxygen supply is performed by the two oxygen injection lances 203, so that the combustion can be continued, and then the inside of the combustion chamber formed in the plurality of single splicing rings 304 is heated, the heat accumulator 307 is installed in the combustion chamber, so that the combustion chamber is divided into a high temperature zone 305 and a low temperature zone 306 by the heat accumulator 307, and the harmful gas is fully combusted by the plurality of arrayed through holes provided on the surface of the heat accumulator 307, so that the temperature of the hot gas output by the first hot air conveying pipe 207 is accurately controlled, and the efficient cracking process is ensured;

[0040] The hot air circulating pipe 7 is installed between the reflux input pipe 206 and the reflux output pipe 504, wherein the hot air circulating pipe 7 is fixedly connected with the upper end of the second hot air conveying pipe 208, a plurality of cracking interfaces are provided at the rear end of the hot air circulating pipe 7, so that the second hot air conveying pipe 208 is connected with the plurality of cracking interfaces through the hot air circulating pipe 7, and then the plurality of cracking devices 4 are communicated through the cracking interfaces, so that the hot blast furnace 1 can supply hot air to the plurality of cracking devices 4 through the hot air circulating pipe 7, and the cracking operation of the plurality of cracking devices 4 on the polymer material is realized;

[0041] The hot gas output by the first hot air conveying pipe 207 can be conveyed to the inside of the hot air distribution box 602 through the hot air input pipe 601, and then the hot air distribution box 602 uniformly distributes the hot gas to the inside of the plurality of hot air guide pipes 604 under the support of the input installation cover 502, and the hot air guide spiral strip 605 is fixedly installed on the surface of the hot air guide pipe 604, so that the hot air is subjected to one-stage heat transfer through the hot air guide pipe 604, and the hot air is reversed through the hot air reversing pipe 603, and then the flow direction of the hot gas in the hot air reversing pipe 603 is opposite to that in the hot air guide pipe 604, so that the hot gas is guided by the spiral guide pipe 604 through the hot air reversing pipe 603, the residence time and the contact area in the hot air conveying process are increased, the temperature is uniformly distributed, the heat transfer efficiency is improved, and the static cracking of the polymer material in the cracking chamber is stably realized.

[0042] After the hot air is utilized by the hot air reversing pipe 603, the hot air is collected and again distributed to the inside of the outer layer of the waste heat isolation cover 505 and the inner layer of the waste heat isolation cover 506 through the sealing air guide base 509, and then the outer layer of the waste heat isolation cover 505 and the inner layer of the waste heat isolation cover 506 utilize the waste heat of the hot air through the plurality of waste heat guide spiral strips 507, so as to reduce the local overheating or cold spot phenomenon in the cracking chamber, and ensure that the heating process is more uniform.

[0043] After the utilization of the waste heat of the hot gas is completed, the return air blower 204 is started, so that the return air blower 204 can return the cracked hot gas into the combustion chamber in sequence through the return air input pipe 206, the hot air circulation pipe 7 and the return air output pipe 504 under the support of the return air box 205, the utilization of the waste heat in the hot gas can be further improved, the heat preservation operation of the cracker can be facilitated, the heat utilization rate of the hot air can be improved, the combustion intensity in the combustion chamber and the use amount of the combustion material can be reduced, the energy saving and efficiency are higher, after the cracking is completed, the cold air conveying blower 210 is started, so that the cold air conveying blower 210 conveys the external cold gas to the inner side of the first hot air conveying pipe 207 through the cold air input pipe 209, then the first hot air conveying pipe 207 inputs the cold gas through the hot air input pipe 601 and the hot air distribution box 602, the rapid and stable cooling operation of the cracking chamber is realized.

[0044] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A high polymer pyrolysis system with high efficiency and energy saving, comprising a hot blast stove (1) and a pyrolyzer (4), characterized in that: The hot blast furnace (1) is provided with a hot blast circulating pipeline (7) between the hot blast furnace (1) and the cracker (4), the hot blast furnace (1) is composed of a combustion ventilation mechanism (2) and an isolated heat storage mechanism (3), the isolated heat storage mechanism (3) is located in the combustion ventilation mechanism (2), the cracker (4) is composed of a backflow cracking mechanism (5) and a shunt temperature increasing mechanism (6), the shunt temperature increasing mechanism (6) is located on the inner side of the backflow cracking mechanism (5), the isolated heat storage mechanism (3) comprises a partition cover (301), a temperature insulation layer (303) is arranged in the partition cover (301), the partition cover (301) and the temperature insulation layer (303) are fixedly connected through a plurality of partition support frames (302), a plurality of single body splicing rings (304) are fixedly arranged in the temperature insulation layer (303), an inner side of the plurality of single body splicing rings (304) forms a combustion chamber, a high-temperature zone (305) and a low-temperature zone (306) are arranged on the inner side of the combustion chamber, and a heat storage body (307) is arranged between the high-temperature zone (305) and the low-temperature zone (306); The backflow cracking mechanism (5) comprises an outer layer waste heat isolation cover (505), an inner layer waste heat isolation cover (506) is arranged on the inner side of the outer layer waste heat isolation cover (505), a plurality of waste heat guide spiral strips (507) are fixedly arranged between the outer layer waste heat isolation cover (505) and the inner layer waste heat isolation cover (506), a backflow output pipe (504) is fixedly arranged on one side of the outer layer waste heat isolation cover (505), the shunt temperature increasing mechanism (6) comprises a hot blast input pipe (601), the hot blast input pipe (601) is fixedly provided with a hot blast shunt box (602) at one end, a plurality of hot blast guide pipes (604) are fixedly arranged at one end of the hot blast shunt box (602), a hot blast reversing pipe (603) is arranged on the outer side of the hot blast guide pipe (604), and a hot blast guide spiral strip (605) is arranged between the hot blast guide pipe (604) and the hot blast reversing pipe (603).

2. The high efficient and energy saving polymer cleavage system according to claim 1, characterized in that: The combustion ventilation mechanism (2) comprises a hot air shell (202), the hot air shell (202) is fixedly connected with a partition cover (301), a combustion machine (201) is fixedly installed at the rear end of the hot air shell (202), air injection lances (203) are fixedly installed on the two sides of the combustion machine (201), a backflow box (205) is fixedly installed on one side of the hot air shell (202), a backflow fan (204) is fixedly installed on the rear end surface of the backflow box (205), a backflow input pipe (206) is fixedly installed on the front end of the backflow box (205), a first hot air conveying pipe (207) is fixedly installed on the front end of the hot air shell (202), a second hot air conveying pipe (208) is fixedly installed on one side of the first hot air conveying pipe (207), a cold air input pipe (209) is fixedly installed on the other side of the first hot air conveying pipe (207), a cold air conveying fan (210) is fixedly installed on the end of the cold air input pipe (209) away from the first hot air conveying pipe (207), pneumatic valves (211) are fixedly arranged between the backflow box (205) and the backflow input pipe (206), the first hot air conveying pipe (207) and the second hot air conveying pipe (208) and the cold air input pipe (209) and the cold air conveying fan (210).

3. The high efficiency, energy conserving, polymer cleavage system of claim 2, wherein: The backflow cracking mechanism (5) further comprises a cracking mounting shell (501) fixedly connected with an outer layer waste heat isolation cover (505), a plurality of exhaust ends (503) are fixedly installed between the cracking mounting shell (501) and the outer layer waste heat isolation cover (505), an input mounting cover (502) is fixedly installed at the rear end of the cracking mounting shell (501), a plugging gate plate (508) is installed at the front end of the cracking mounting shell (501), and a sealing air guide seat (509) is fixedly installed between the input mounting cover (502) and an inner layer waste heat isolation cover (506).

4. The high efficiency, energy conserving, polymer cleavage system of claim 3, wherein: The bottom ends of the two air injection lances (203) penetrate the hot air shell (202) and are inserted into the interior of the combustion chamber, the backflow input pipe (206) is throughly connected with the combustion chamber through the backflow box (205), the output ends of the backflow fan (204) and the cold air conveying fan (210) are fixedly provided with blades, the backflow input pipe (206) is throughly connected with the backflow output pipe (504) through the hot air circulation pipeline (7), the hot air circulation pipeline (7) is fixedly connected with the upper end of the second hot air conveying pipe (208), the rear end of the hot air circulation pipeline (7) is provided with a plurality of cracking interfaces, and the second hot air conveying pipe (208) is throughly connected with the plurality of cracking interfaces through the hot air circulation pipeline (7).

5. The high efficiency, energy conserving, polymer cleavage system of claim 4, wherein: The cold air input pipe (209) is connected with the second hot air conveying pipe (208) through the first hot air conveying pipe (207), the rear end of the first hot air conveying pipe (207) penetrates the hot air shell (202) and is inserted into the inner side of the combustion chamber, the first hot air conveying pipe (207) is connected with the low temperature area (306), a plurality of single body splicing rings (304) are linearly arranged along the axis of the heat storage body (307), the heat storage body (307) is fixedly connected with the single body splicing ring (304), the high temperature area (305) is located between the combustion machine (201) and the heat storage body (307), the temperature in the high temperature area (305) is 1000 degrees Celsius, and the temperature in the low temperature area (306) is 700 degrees Celsius.

6. The high efficiency, energy conserving, polymer cleavage system of claim 5, wherein: The front end of the first hot air conveying pipe (207) is fixedly connected with the hot air input pipe (601), the first hot air conveying pipe (207) is fixedly connected with the hot air distribution box (602) through the hot air input pipe (601), the input mounting cover (502) is fixedly connected with the hot air distribution box (602), and the hot air distribution box (602) is used for conveying hot gas and distributing to the inside of a plurality of hot air guide pipes (604).

7. The high efficiency, energy conserving, polymer cleavage system of claim 6, wherein: The cracking mounting shell (501) is fixedly connected with a plurality of hot air reversing pipes (603), the hot air guide pipe (604) is coaxial with the hot air reversing pipe (603), the hot air guide pipe (604) is fixedly connected with the hot air guide spiral strip (605), the hot gas flow direction of the inner side of the hot air guide pipe (604) is opposite to the hot gas flow direction between the hot air guide pipe (604) and the hot air reversing pipe (603), and the sealing air guide seat (509) is throughly connected with a plurality of hot air reversing pipes (603).

8. The high efficiency, energy conserving, polymer cleavage system of claim 7, wherein: The sealing air guide seat (509) is throughly connected between the outer layer waste heat isolation cover (505) and the inner layer waste heat isolation cover (506), the front end of the backflow output pipe (504) penetrates the cracking mounting shell (501) and is inserted between the outer layer waste heat isolation cover (505) and the inner layer waste heat isolation cover (506), the temperature in the backflow output pipe (504) is 330 degrees Celsius, the outer layer waste heat isolation cover (505) and the inner layer waste heat isolation cover (506) are fixedly connected through a plurality of waste heat guide spiral strips (507), the inner side of the inner layer waste heat isolation cover (506) is provided with a cracking chamber, and the bottom end of the exhaust end (503) penetrates the cracking mounting shell (501), the outer layer waste heat isolation cover (505) and the inner layer waste heat isolation cover (506) in sequence and is inserted into the inner side of the cracking chamber.

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