CN110388649B

CN110388649B - Heat accumulating type organic waste gas cracking furnace

Info

Publication number: CN110388649B
Application number: CN201910661907.5A
Authority: CN
Inventors: 杨帆
Original assignee: Nantong Tuhai Machinery Co ltd
Current assignee: Nantong Tuhai Machinery Co ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2021-04-09
Anticipated expiration: 2039-07-22
Also published as: CN110388649A

Abstract

The invention discloses a heat accumulating type organic waste gas cracking furnace, which comprises a cracking furnace and supporting legs arranged at four corners of the bottom of the cracking furnace, wherein an air equalizing box is arranged at the top of the cracking furnace, an impurity removing pipe in a V-shaped structure is communicated with the end surface of the right side of the air equalizing box, and a heat accumulating cracking chamber is arranged at the bottom of the inner side of the cracking furnace. According to the invention, firstly, the organic waste gas is subjected to first-stage incomplete cracking through the cracking furnace and then is subjected to complete cracking through the thermal storage cracking chamber, the cracking rate and efficiency are higher, meanwhile, the ceramic thermal storage body is used for storing the temperature inside the thermal storage cracking chamber, meanwhile, the organic waste gas is cracked to generate heat, cracking can be completed only by heating a small amount of natural gas, the consumption of energy is saved, secondly, impurity particles are blocked through the impurity removing pipe and the impurity blocking cloth, the impurity particles are prevented from flowing into the cracking furnace to be combusted to generate other waste gases, and finally, the cracked organic waste gas is guided into the heat exchanger through the heat transfer pipe, so that the utilization rate.

Description

Heat accumulating type organic waste gas cracking furnace

Technical Field

The invention relates to the technical field of cracking furnaces, in particular to a heat accumulating type organic waste gas cracking furnace.

Background

The cracking furnace is a device for cracking hydrocarbons. The requirements for the cracking furnace are: (1) can rapidly heat the reactants to

To ensure the balanced yield of ethylene and to ensure heat supply and heat transfer; (2) the medium retention time is short, and the generation of coke in the cracking process is reduced; (3) suitable high temperature resistant materials. Because of the different raw materials and methods for providing the heat required by cracking, different cracking furnace types are adopted, and a heat accumulating type cracking furnace, a sand furnace, a tubular cracking furnace and the like are commonly used. The tubular cracking furnace is widely applied and the technology is mature at present.

The existing organic waste gas treatment scheme aiming at the emission in the factory process production process mainly comprises activated carbon adsorption recovery and catalytic combustion, but the treatment condition is not ideal. The organic waste gas composition that the mill discharged is comparatively complicated, wherein contain the volatile gas of multiple chemical solvent, adsorb later solid like this and need carry out retreatment just can recycle, many organic waste gas can't recycle even, change solid pollutant from gaseous pollutant like this, huge treatment cost has also been increased, and current processing scheme is because of its structure complicacy (needs a plurality of high temperature combustion chambers usually), the system is unstable (valve mechanism is many), the power consumption is big (natural gas consumes greatly) scheduling problem, the organic waste gas concentration after the processing can't reach the requirement of safe emission.

SUMMERY OF THE UTILITY MODEL

The invention aims to: the heat accumulating type organic waste gas cracking furnace is provided for solving the problems of large energy consumption, complex structure and substandard concentration of the treated organic waste gas.

In order to achieve the purpose, the invention adopts the following technical scheme:

a heat accumulating type organic waste gas cracking furnace comprises a cracking furnace and supporting legs arranged at four corners of the bottom of the cracking furnace, wherein an air equalizing box is arranged at the top of the cracking furnace, the right side end face of the air equalizing box is communicated with an impurity removing pipe in a V-shaped structure, a heat accumulating cracking chamber is arranged at the bottom of the inner side of the cracking furnace, a plurality of groups of air inlets are formed in the bottom of the side end face of the heat accumulating cracking chamber, a burner is arranged at the bottom of the heat accumulating cracking chamber, a natural gas connecting pipe is arranged at the bottom of the burner, a ceramic heat accumulator is arranged in the heat accumulating cracking chamber, two groups of heat transfer pipes are symmetrically communicated with the top of the side end face of the heat accumulating cracking chamber along the vertical center of the heat accumulating cracking chamber, the free ends of the heat transfer pipes are communicated with a heat exchanger, a second driving, the side end face of the air equalizing box is located impurity removing pipe and is provided with impurity blocking cloth, the inner side of the air equalizing box is elastically connected with a push rod which is of a side T-shaped structure through a reset spring, the horizontal end of the push rod is fixedly connected with the impurity blocking cloth, the bottom of the outer end face of an output shaft of the second driving motor is provided with an air feeder, and the impurity blocking cloth is of a breathable net structure.

As a further description of the above technical solution:

the heat transfer pipe is side L type structure, a drive motor is installed at the vertical terminal surface top of distolateral side of heat transfer pipe, the exhaust fan is installed to the outer terminal surface of first drive motor's output.

As a further description of the above technical solution:

and a bypass valve is arranged on the outer end face of the horizontal end of the heat transfer pipe.

As a further description of the above technical solution:

the bottom of the front end face of the impurity removal pipe is communicated with an impurity collection box, an impurity discharge pipe is mounted on the side end face of the impurity collection box, and a control valve is mounted on the outer end face of the impurity discharge pipe.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. in the invention, the organic waste gas is cracked in a graded cracking mode, the heat storage cracking chamber is heated by the burner, the temperature of the heat storage cracking chamber rises, so that the temperature of the interior of the cracking furnace rises to 400-500 ℃ through the waste heat generated by the heat storage cracking chamber, when the organic waste gas is blown into the cracking furnace through the air equalizing box, the organic waste gas is incompletely cracked through the temperature of the interior of the cracking furnace, the organic waste gas is subjected to first-stage cracking through the cracking furnace, the incompletely cracked organic waste gas is led into the heat storage cracking chamber through an air inlet, the organic waste gas is completely cracked through the high temperature (750-800 ℃) in the heat storage cracking chamber, the cracking efficiency of the organic waste gas is faster and more sufficient through the multistage cracking mode, meanwhile, the ceramic heat accumulator arranged in the heat storage cracking chamber can store the heat generated by natural gas and the heat generated in the cracking process of the organic waste gas, when organic waste gas concentration reached a definite value, can reach organic waste gas and only need the state that very few natural gas heating also can automatic pyrolysis, this device simple structure has solved the problem that the organic waste gas concentration after the power consumption is big and the processing is not up to standard.

2. In the invention, the impurity removing pipe with a V-shaped structure is arranged, so that when organic waste gas enters the impurity removing pipe, the running speed of particle impurities in the organic waste gas is reduced through the blocking of the inclined edge of the impurity removing pipe, part of the impurities fall downwards under the action of gravity and flow into the impurity collecting box, part of the particle impurities pass through the impurity removing pipe and are blocked by the impurity blocking cloth, so that the particle impurities fall downwards into the impurity collecting box, the push rod is driven to reciprocate leftwards and rightwards under the action of the eccentric wheel and the reset spring through the rotation of the eccentric wheel arranged on the outer end face of the output shaft of the second driving motor, so that the impurity blocking cloth is driven to shake back and forth leftwards, the impurity blocking cloth is prevented from being blocked by the impurity particles, meanwhile, the particle impurities attached to the impurity blocking cloth are quickly shaken down into the impurity collecting box, and the particle impurities in the organic waste gas are removed, so that the particle impurities are, the organic waste gas treatment effect is improved.

3. According to the invention, the heat storage cracking chamber is communicated with the heat exchanger, the residual heat provides heat for other heat using units through the heat exchange device, and mainly comprises hot water, heat conduction oil and hot air, so that the utilization of energy is fully realized, the waste of heat energy is prevented, and the utilization rate of the energy is improved.

Drawings

FIG. 1 is a schematic diagram of a regenerative organic waste gas cracking furnace according to the present invention;

FIG. 2 is a schematic diagram of a cross-sectional view of the present invention;

FIG. 3 is a schematic view showing the internal structure of the homowind box of the present invention.

Illustration of the drawings:

1. a cracking furnace; 2. supporting legs; 3. a combustion engine; 4. a natural gas pipe connection; 5. an air equalizing box; 6. an impurity collecting box; 7. an impurity discharge pipe; 8. a heat transfer tube; 9. a first drive motor; 10. a bypass valve; 11. a heat exchanger; 12. a blower; 13. a regenerative pyrolysis chamber; 14. a ceramic heat accumulator; 15. an air inlet; 16. an exhaust fan; 17. an eccentric wheel; 18. an impurity removal pipe; 19. a push rod; 20. a return spring; 21. impurity blocking cloth; 22. a second drive motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In a first embodiment, please refer to fig. 1-3, the present invention provides a technical solution: a heat accumulating type organic waste gas cracking furnace comprises a cracking furnace 1 and supporting legs 2 installed at four corners of the bottom of the cracking furnace 1, wherein an air equalizing box 5 is installed at the top of the cracking furnace 1, an impurity removing pipe 18 in a V-shaped structure is communicated with the end face of the right side of the air equalizing box 5, a heat accumulating cracking chamber 13 is installed at the bottom of the inner side of the cracking furnace 1, a plurality of groups of air inlets 15 are formed in the bottom of the side end face of the heat accumulating cracking chamber 13, a burner 3 is installed at the bottom of the heat accumulating cracking chamber 13, a natural gas connecting pipe 4 is installed at the bottom of the burner 3, a ceramic heat accumulator 14 is installed inside the heat accumulating cracking chamber 13, two groups of heat transfer pipes 8 are symmetrically communicated with the top of the side end face of the heat accumulating cracking chamber 13 along the vertical center of the heat accumulating cracking chamber 13, a heat exchanger 11 is communicated with the free end of, the temperature rise in the heat accumulation cracking chamber 13 drives the temperature rise in the cracking furnace 1, make the temperature in the cracking furnace 1 reach 450 ℃ -500 ℃, thereby carry out the incomplete pyrolysis of first order to organic waste gas through the internal temperature of cracking furnace 1, make the rate of organic waste gas pyrolysis after getting into the heat accumulation cracking chamber 13 accelerate, and the pyrolysis is more abundant, and simultaneously, the ceramic heat accumulator 14 through the inside setting of heat accumulation cracking chamber 13 stores the heat, simultaneously through the heat release when organic waste gas pyrolysis again, make heat accumulation cracking chamber 13 only need a small amount of natural gas to heat in the organic waste gas pyrolysis afterwards, the consumption of the energy has been practiced thrift greatly.

In the second embodiment, as shown in fig. 2 and 3, a second driving motor 22 is installed on the top of the air equalizing box 5, an eccentric wheel 17 is installed in the middle of the outer end face of the output end of the second driving motor 22, a trash baffle 21 is installed on the side end face of the air equalizing box 5, which is located at the trash removing pipe 18, a push rod 19 in a side T-shaped structure is elastically connected to the inner side of the air equalizing box 5 through a return spring 20, the horizontal end of the push rod 19 is fixedly connected to the trash baffle 21, the trash removing pipe 18 is arranged in a V-shape, when particulate impurities in the organic waste gas are input into the trash removing pipe 18, the particulate impurities collide with the inclined edge of the trash removing pipe 18, so as to reduce the speed of the particulate impurities, so that part of the particulate impurities flow downwards into the impurity collecting box 6 under the action of gravity, the remaining particulate impurities are blocked by the trash baffle 21, and the second driving motor 22 drives the eccentric wheel 17 to rotate, so that the, thereby driving the shaking of the impurity blocking cloth 21, quickening the dropping of the impurity particles on the impurity blocking cloth 21 and simultaneously preventing the blockage of the impurity blocking cloth 21.

In the third embodiment, as shown in fig. 2, the heat transfer pipe 8 is in a side L-shaped structure, the first driving motor 9 is installed at the top of the vertical end face of the heat transfer pipe 8, the exhaust fan 16 is installed on the outer end face of the output end of the first driving motor 9, the rotation of the exhaust fan 16 is driven by the rotation of the first driving motor 9, the organic exhaust gas cracked in the thermal storage cracking chamber 13 is conveyed to the heat exchanger 11, the heat in the organic exhaust gas is used for other purposes by the heat exchange of the heat exchanger 11, and the utilization rate of energy is improved.

In the fourth embodiment, as shown in fig. 1, the bottom of the front end face of the impurity removing pipe 18 is communicated with the impurity collecting box 6, the side end face of the impurity collecting box 6 is provided with the impurity discharging pipe 7, the outer end face of the impurity discharging pipe 7 is provided with the control valve, the particle impurities accumulated at the bottom of the impurity removing pipe 18 are collected by the impurity collecting box 6 communicated with the bottom of the front end face of the impurity removing pipe 18, the particle impurities are discharged through the impurity discharging pipe 7, and the particle impurities are prevented from being combusted in the cracking furnace 1 to generate new waste gas.

The working principle is as follows: when in use, the burner 3 is turned on, the heat storage cracking chamber 13 is heated, the temperature in the heat storage cracking chamber 13 reaches 750-800 ℃, meanwhile, the temperature of the cracking furnace 1 rises to 400-500 ℃ under the action of the waste heat of the heat storage cracking chamber 13, the second driving motor 22 is turned on, the eccentric wheel 17 and the blower 12 are driven to rotate, at the moment, the organic waste gas is guided into the impurity removing pipe 18, through the design that the impurity removing pipe 18 is in a V-shaped structure, when impurity particles in the organic waste gas impact the inclined side edge of the impurity removing pipe 18, the speed of the impurity particles is reduced, part of the impurity particles flow downwards into the impurity collecting box 6 under the action of gravity, meanwhile, the rest impurity particles are blocked by the impurity blocking cloth 21, meanwhile, the push rod 19 does left-right reciprocating motion under the action of the eccentric wheel 17 and the reset spring 20, so as to drive the shaking of the impurity blocking cloth 21, and quickly shake the impurity particles on the impurity blocking cloth 21 downwards, meanwhile, prevent the jam of backstop miscellaneous cloth 21, shake off the impurity granule in the impurity collecting box 6 and discharge through impurity discharge pipe 7 and collect, at this moment, organic waste gas after the edulcoration is carried to pyrolysis furnace 1 in through forced draught blower 12, carry out the incomplete decomposition of first order, the organic waste gas of incomplete schizolysis is gone into through going into wind gap 15 and is carried out the complete schizolysis in leading-in heat accumulation pyrolysis chamber 13, simultaneously through the ceramic heat accumulator 14 in heat accumulation pyrolysis chamber 13 to thermal storage and the exothermic of organic waste gas schizolysis, make only need a small amount of natural gas heating just can accomplish the schizolysis of organic waste gas in the heat accumulation pyrolysis chamber 13, the consumption of natural gas has been reduced, at this moment, open bypass valve 10, the organic waste gas after will splitting is led into in heat exchanger 11, heat exchange to other effects in the organic waste gas after will splitting through heat exchanger 11.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. Heat accumulating type organic waste gas cracking furnace, including cracking furnace (1) and install supporting leg (2) in four corners in cracking furnace (1) bottom, its characterized in that, equal bellows (5) are installed at the top of cracking furnace (1), the right side terminal surface intercommunication of equal bellows (5) has impurity removal pipe (18) that are V-arrangement structure, heat accumulation pyrolysis chamber (13) is installed to the inboard bottom of cracking furnace (1), multiunit income wind gap (15) have been seted up to the side end surface bottom of heat accumulation pyrolysis chamber (13), combustor (3) is installed to the bottom of heat accumulation pyrolysis chamber (13), and combustor (3) bottom installs natural gas (4), the internally mounted of heat accumulation pyrolysis chamber takeover (13) has ceramic heat accumulator (14), the side end surface top of heat accumulation pyrolysis chamber (13) is the symmetry intercommunication along heat accumulation pyrolysis chamber (13) vertical center has two sets of heat-transfer pipe (8), and the free end intercommunication of heat-transfer pipe (8) has heat exchanger (11), second driving motor (22) are installed at the top of equal bellows (5), the outer terminal surface mid-mounting of output of second driving motor (22) has eccentric wheel (17), the side end face of equal bellows (5) is located impurity removal pipe (18) and locates to install and keep off miscellaneous cloth (21), the inboard of equal bellows (5) has push rod (19) that are side T shape structure through reset spring (20) elastic connection, and the horizontal end of push rod (19) and the miscellaneous cloth (21) fixed connection of keeping off, forced draught blower (12) are installed to the outer terminal surface bottom of output shaft of second driving motor (22), it is ventilative network structure to keep off miscellaneous cloth (21).

2. The regenerative organic waste gas cracking furnace according to claim 1, wherein the heat transfer pipe (8) is of a side L-shaped structure, a first driving motor (9) is installed on the top of the end surface of the vertical end of the heat transfer pipe (8), and an exhaust fan (16) is installed on the outer end surface of the output end of the first driving motor (9).

3. A regenerative organic waste gas cracking furnace according to claim 1, characterized in that a bypass valve (10) is installed on the outer end face of the horizontal end of the heat transfer pipe (8).

4. A regenerative organic waste gas cracking furnace according to claim 1, characterized in that the bottom of the front end face of the impurity removing pipe (18) is communicated with an impurity collecting tank (6), the side end face of the impurity collecting tank (6) is provided with an impurity discharging pipe (7), and the outer end face of the impurity discharging pipe (7) is provided with a control valve.