CN210215232U - Semi coke waste heat recycling system - Google Patents
Semi coke waste heat recycling system Download PDFInfo
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- CN210215232U CN210215232U CN201921009977.4U CN201921009977U CN210215232U CN 210215232 U CN210215232 U CN 210215232U CN 201921009977 U CN201921009977 U CN 201921009977U CN 210215232 U CN210215232 U CN 210215232U
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Abstract
The utility model relates to a blue charcoal waste heat recovery system, which belongs to the technical field of mixed coal pyrolysis blue charcoal waste heat recovery, in particular to a blue charcoal waste heat recovery system, which comprises a hollow furnace body and a coke pushing system, wherein the top of the furnace body is provided with a plurality of feeding pipes, the upper part of the furnace body is provided with a gas collection and air guide device, the gas collection and air guide device is provided with an exhaust pipe, and one end of the exhaust pipe extends out of the furnace body from the top of the furnace body; the bottom of the furnace body is provided with a plurality of mutually parallel pyrolysis walls, and the pyrolysis walls are provided with air inlets and air distribution holes; a discharge channel is arranged in the area between two adjacent pyrolysis walls; compared with the prior art, the utility model has the advantages that: inside cooling device that sets up at one-level cooling system for the cooling volume enlarges, under the condition of guaranteeing that heat transfer area is not reduced, can reduce pyrolysis furnace platform height, secondly can increase heat transfer area, can effectively cool down to blue charcoal center department in the one-level cooling system simultaneously, has avoided the heat transfer inhomogeneous.
Description
Technical Field
The utility model relates to a belong to blue charcoal waste heat recovery of coal mixing pyrolysis and utilize technical field, concretely relates to blue charcoal waste heat recovery and utilize system.
Background
In the blue charcoal industry of China at present, the vertical pyrolysis furnace is mainly adopted, the blue charcoal quenching technology adopts wet quenching for many years, the process technology falls behind, certain environmental pollution is caused, and the blue charcoal quenching technology mainly has the defects that: the wet quenching has large water consumption, and the water is directly used for quenching coke, so that the aim of quenching coke can be achieved only by a large amount of water; waste heat is wasted, a large amount of steam generated by water coke scooping is directly discharged into the atmosphere, and a large amount of heat is taken away; the quality of the semicoke is influenced, and the semicoke has more reticular cracks caused by rapid cooling after meeting water at high temperature, so that the quality of the semicoke is influenced; a large amount of harmful substances are generated, and the high-temperature semicoke is contacted with water to generate a large amount of harmful substances such as phenol, cyanide and the like. For example, the invention patent publication No. CN104236337A, cooling is performed by adopting an internal and external heat exchange mode, but because the upper and lower openings of the semi-coke channel are different, and the semi-coke channel is divided into two small channels, the semi-coke discharging speed is reduced, and in addition, the semi-coke is only provided with one-stage cooling, and the effect after the one-stage cooling is obviously inferior to the multi-stage cooling effect.
Aiming at the problems in the wet quenching technology, the technology can save water, reduce consumption, improve energy utilization rate, reduce pollution, improve semi coke quality, and more importantly, prevent the release of toxic and harmful substances, thereby achieving environmental protection benefit and economic benefit, and is an important research subject in the technical field.
Have better cooling effect in order to realize the blue charcoal of red-hot in the upright stove, reach water conservation and consumption reduction simultaneously, improve energy utilization, the purpose of pollution abatement, the utility model discloses reform transform the upgrading to current wet process technique to reach the effect of dry process quenching, can reduce water resource consumption, the utilization of recoverable blue charcoal waste heat has simultaneously guaranteed the stability of quality of blue charcoal, and more importantly has stopped the production of poisonous and harmful substance, and then has reached energy-conserving benefit, and environmental social and economic benefits will be more obvious.
SUMMERY OF THE UTILITY MODEL
In order to achieve the technical purpose, the invention provides a semi-coke waste heat recycling system which adopts a two-stage cooling technology, increases the heat exchange area, improves the heat exchange efficiency and solves the technical problems.
The utility model relates to a semi coke waste heat recycling system, which comprises a hollow furnace body and a coke pushing system, wherein the top of the furnace body is provided with a plurality of feeding pipes, the upper part of the furnace body is provided with a gas collection and guide device, the gas collection and guide device is provided with an exhaust pipe, and one end of the exhaust pipe extends out of the furnace body from the top of the furnace body; the bottom of the furnace body is provided with a plurality of mutually parallel pyrolysis walls, and the pyrolysis walls are provided with air inlets and air distribution holes; a discharge channel is arranged in the area between two adjacent pyrolysis walls;
the furnace body is connected with the coke pushing system through a cooling system, the cooling system is provided with a cooling channel communicated with the discharging channel and the coke pushing system, and the cooling channel is vertically arranged.
Preferably, the cooling system is provided with two stages, namely a first-stage cooling system and a second-stage cooling system, and the second-stage cooling system is connected with the furnace body through the first-stage cooling system.
Preferably, the primary cooling system comprises primary cooling devices with the same number as the discharge channels, each primary cooling device comprises an external upper collecting pipe and an external lower collecting pipe, each external upper collecting pipe is connected with each external lower collecting pipe through a cooling array pipe, each external upper collecting pipe is provided with an external cooling water outlet, and each external lower collecting pipe is provided with an external cooling water inlet;
the cooling tube arrays are arranged along the circumferential direction of the ring where the external upper collecting tube is arranged, the cooling tube arrays and the connecting plates form a circumferentially sealed cylindrical area, the external upper collecting tube and the external lower collecting tube form a primary cooling channel, and the primary cooling channel is vertically arranged;
an internal cooling device is also arranged in the primary cooling channel.
Preferably, the internal cooling device comprises two internal upper headers and two internal lower headers which are parallel to each other and arranged along the vertical direction, and the internal upper headers and the internal lower headers are both straight pipes; the internal upper header is communicated with the internal lower header through a vertical tube array arranged between the internal upper header and the internal lower header, the internal lower header is provided with an internal cooling water inlet, and the internal upper header is provided with an internal cooling water outlet.
Preferably, the cooling tubes comprise three communicated pipelines, namely a vertically arranged middle tube, an upper end tube and a lower end tube which are connected to two ends of the middle tube, and the upper end tube and the lower end tube are obliquely arranged;
the upper end pipes are respectively connected with an external upper collecting pipe through a cooling connecting pipe which is vertically arranged and one end of which extends into the furnace body;
in the two cooling tubes which are correspondingly arranged, the distance between the two middle tubes is larger than the distance between the two upper end tubes or the two lower end tubes.
The connecting plate is also provided with a plurality of nozzles which are all positioned on the connecting plate between two adjacent upper end pipes.
Preferably, the external upper header comprises two longitudinal pipes and two horizontal pipes, the two longitudinal pipes are arranged along the length of the pyrolysis wall, the two longitudinal pipes are respectively arranged at two sides of the same material channel and are fixedly connected with the pyrolysis walls at two sides of the material channel, and the longitudinal pipes can be embedded in the pyrolysis walls or fixed on the pyrolysis walls through fixing pieces;
the horizontal pipes are arranged across the material channel, two ends of the two horizontal pipes are respectively connected with the same end of the two longitudinal pipes through two vertical pipes, and the external cooling water outlet is arranged on one of the horizontal pipes; one end of the discharge channel is located in the area between the two horizontal pipes and the two longitudinal pipes.
Preferably, the distance between adjacent vertical tubes is 7-10cm, and the distance between adjacent cooling tubes is 7-10 cm.
Preferably, the longitudinal pipes are all arranged in the furnace body.
Or preferably, the secondary cooling system comprises annular columnar water-cooling jackets the number of which is the same as that of the primary cooling devices, secondary cooling water inlets are formed in the lower parts of the water-cooling jackets, and secondary cooling water outlets are formed in the upper parts of the water-cooling jackets; the central columnar area of the water-cooling jacket is a secondary cooling channel, one end of the secondary cooling channel on the water-cooling jacket, which faces the primary cooling device, is communicated with the primary cooling channel on the primary cooling device connected with the water-cooling jacket, and the other end of the secondary cooling channel on the water-cooling jacket is communicated with the coke pushing system.
Preferably, one side of the outer lower header, which faces the secondary cooling system, is fixedly connected with a flange, one side of the secondary cooling system, which faces the outer lower header, is fixedly connected with another flange, and the two flanges are overlapped up and down and are fixedly connected.
Compared with the prior art, the utility model, obvious advantage has:
(1) inside cooling device that sets up at one-level cooling system makes the heat transfer area increase, and one-level cooling system diffuses to both ends simultaneously for the cooling volume enlarges, under the condition of guaranteeing that heat transfer area does not reduce, can reduce pyrolysis oven platform height, can effectively cool down to blue charcoal center department in the one-level cooling system in addition, has avoided the heat transfer inhomogeneous.
(2) The primary cooling system is internally provided with a nozzle, and the red-hot semi coke can be extinguished by spraying a proper amount of water. In the coke quenching process, water reacts with incandescent blue carbon to generate water vapor and coal gas, wherein the coal gas is beneficial to pyrolysis of the coking chamber, the water vapor can also play a role in humidifying the blue carbon, and in addition, the water vapor can also play a role in lubricating wheels in a coke pushing system.
(3) The longitudinal pipe is arranged in the furnace body, and the cooling tube array is connected with the longitudinal pipe, so that the upper end part of the cooling tube array extends into the furnace body, the semi coke is cooled without a coke outlet at high temperature, the coke quenching effect is improved, and the heat exchange area is increased.
(4) The secondary cooling system is an annular columnar water-cooling jacket, so that the cooling and heat exchange area is increased, and the heat exchange efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the cooling system.
Fig. 3 is a left side view of fig. 2.
Fig. 4 is a schematic view of the internal cooling device.
Reference numerals: 1-furnace body, 2-pyrolysis wall, 3-horizontal pipe, 4-longitudinal pipe, 5-vertical pipe, 6-cooling tube array, 7-connecting plate, 8-water cooling jacket, 9-coke pushing system, 10-internal cooling water inlet, 11-middle pipe, 12-lower end pipe, 13-upper end pipe, 14-external lower header, 15-internal upper header, 16-internal lower header and 17-vertical tube array.
Detailed Description
The utility model relates to a blue charcoal waste heat recovery utilizes system, including hollow furnace body 1 and coke pushing system 9, the top of furnace body 1 is provided with a plurality of inlet pipes, the upper portion of furnace body 1 is provided with the gas collection air guide device, is provided with the blast pipe on the gas collection air guide device, one end of the blast pipe stretches out of furnace body 1 from the top of furnace body 1; the bottom of the furnace body 1 is provided with a plurality of mutually parallel pyrolysis walls 2, and the pyrolysis walls 2 are provided with air inlets and air distribution holes; a discharge channel is arranged in the area between two adjacent pyrolysis walls 2;
the furnace body 1 is connected with the coke pushing system 9 through a cooling system, the cooling system is provided with a cooling channel communicated with the discharging channel and the coke pushing system 9, and the cooling channel is vertically arranged.
The cooling system is provided with two stages, namely a first-stage cooling system and a second-stage cooling system, and the second-stage cooling system is connected with the furnace body 1 through the first-stage cooling system.
The primary cooling system comprises primary cooling devices with the same number as the discharge channels, each primary cooling device comprises an external upper collecting pipe and an external lower collecting pipe 14, each external upper collecting pipe is connected with each external lower collecting pipe 14 through a cooling tube array 6, each external upper collecting pipe is provided with an external cooling water outlet, and each external lower collecting pipe 14 is provided with an external cooling water inlet;
the external upper collecting pipe and the external lower collecting pipe 14 are both annular pipelines, the number of the cooling tubes 6 is multiple, the cooling tubes 6 are arranged along the circumferential direction of the external upper collecting pipe or the external lower collecting pipe 14, two adjacent cooling tubes 6 are connected through a connecting plate 7, the cooling tubes 6 and the connecting plate 7 form a circumferentially sealed cylindrical area, the external upper collecting pipe and the external lower collecting pipe 14 form a primary cooling channel, and the primary cooling channel is vertically arranged;
an internal cooling device is also arranged in the primary cooling channel.
The internal cooling device comprises an internal upper header 15 and an internal lower header 16 which are parallel to each other and are arranged along the vertical direction, wherein both the internal upper header 15 and the internal lower header 16 are straight pipes; the internal upper header 15 is communicated with the internal lower header 16 through vertical tubes 17 arranged between the internal upper header 15 and the internal lower header 16, the internal lower header 16 is provided with an internal cooling water inlet 10, the internal upper header 15 is provided with an internal cooling water outlet, and the upper header and the internal lower header 16 are fixedly connected with the furnace body 1.
The cooling tubes 6 respectively comprise three sections of pipelines which are communicated, namely a middle tube 11 which is vertically arranged, an upper end tube 13 and a lower end tube 12 which are connected to two ends of the middle tube 11, and the upper end tube 13 and the lower end tube 12 are obliquely arranged;
the upper end pipes 13 are respectively connected with an external upper collecting pipe through cooling connecting pipes which are vertically arranged and one ends of which extend into the furnace body 1, and the cooling connecting pipes extend into the furnace body and then are connected with the longitudinal pipes 4 and the horizontal pipes 3;
still be provided with a plurality of nozzle on the connecting plate 7, the nozzle all is located the connecting plate 7 between two adjacent upper end pipes 13, and the nozzle is connected through all passing through the nozzle inlet tube, is connected with the intake pump on the nozzle inlet tube, and the nozzle inlet tube links to each other with the water source.
The external upper header comprises two longitudinal pipes 4 and two horizontal pipes 3, the two longitudinal pipes 4 are arranged along the length of the pyrolysis wall 2, and the two longitudinal pipes 4 are respectively arranged at two sides of the same material channel and are fixedly connected with the pyrolysis wall 2 at two sides of the material channel;
the horizontal pipes 3 are arranged across the material channel, two ends of each of the two horizontal pipes 3 are respectively connected with the same end of each of the two longitudinal pipes 4 through two vertical pipes 5, and the external cooling water outlet is arranged on one of the horizontal pipes 3; one end of the tapping channel is located in the area between the two horizontal tubes 3 and the two longitudinal tubes 4.
The distance between the adjacent vertical tubes 17 is 7-10cm, and the distance between the adjacent cooling tubes 6 is 7-10 cm.
The longitudinal pipes 4 are all arranged in the furnace body 1.
The secondary cooling system comprises annular columnar water cooling jackets 8 the number of which is the same as that of the primary cooling devices, secondary cooling water inlets are formed in the lower parts of the water cooling jackets 8, and secondary cooling water outlets are formed in the upper parts of the water cooling jackets 8; the central columnar area of the water-cooling jacket 8 is a secondary cooling channel, one end of the secondary cooling channel on the water-cooling jacket 8, which faces the primary cooling device, is communicated with the primary cooling channel on the primary cooling device connected with the water-cooling jacket 8, and the other end of the secondary cooling channel on the water-cooling jacket 8 is communicated with the coke pushing system 9.
One side, facing the second-stage cooling system, of the outer lower collecting pipe 14 is fixedly connected with a flange, the other side, facing the outer lower collecting pipe 14, of the second-stage cooling system is fixedly connected with another flange, the two flanges are overlapped up and down and fixedly connected, the two flanges can be in expansion connection, and particularly the two flanges are fixedly connected through a zigzag connecting piece.
The external cooling water outlet is led out after being connected through the same pipeline, the external cooling water inlet is connected with a water source after being connected through the same pipeline, the internal cooling water inlet 10 is connected with the water source after being connected through the same pipeline, and the internal cooling water outlet is led out after being connected through the same pipeline.
The utility model discloses the theory of operation: the semi-coke with the temperature of 800-1200 ℃ generated by pyrolysis in the carbonization chamber in the pyrolysis furnace moves downwards to the external upper collecting pipe of the primary cooling system under the action of gravity, because the first-stage cooling system and the second-stage cooling system are filled with water medium, the red-hot semi coke is contacted with the pipeline to indirectly exchange heat, and the semi coke gradually moves downwards, and is separated into two parts of semi coke by the internal cooling device arranged in the first-stage cooling device, the semi coke is divided into two paths in the first-stage cooling system, and is indirectly exchanged heat and cooled by the internal cooling device and the first-stage cooling device, the water in the pipeline in the first-stage cooling system is vaporized, the water vapor flows out through the external cooling water outlet and the internal cooling water outlet, enters the boiling boiler barrel through the pipeline, and is vaporized by the steam bag separating device, the water is used for power generation, and meanwhile, the separated water is circularly injected into an external cooling water inlet and an internal cooling water inlet 10 of the primary cooling system, and part of raw water is supplemented.
The red-hot semi coke is cooled to about 250 ℃, enters a secondary cooling system, carries out secondary heat exchange and cooling with a water-cooling jacket 8 in the secondary cooling system, is finally cooled to below 100 ℃, and finally enters a coke pushing system 9, wherein water vapor generated by the secondary cooling system enters a boiling-hot boiler barrel through a pipeline, is guided out through vapor obtained by a steam drum separating device and is used for power generation, liquid water is pumped into a secondary cooling water inlet of the secondary cooling system again, and meanwhile, the deficient water is supplemented, so that the cooling effect is ensured.
Claims (10)
1. A semi coke waste heat recycling system comprises a hollow furnace body (1) and a coke pushing system (9), wherein the top of the furnace body (1) is provided with a plurality of feeding pipes, the upper part of the furnace body (1) is provided with a gas collection and guide device, the gas collection and guide device is provided with an exhaust pipe, and one end of the exhaust pipe extends out of the furnace body (1) from the top of the furnace body (1); the bottom of the furnace body (1) is provided with a plurality of mutually parallel pyrolysis walls (2), and the pyrolysis walls (2) are provided with air inlets and air distribution holes; a discharge channel is arranged in the area between two adjacent pyrolysis walls (2);
the method is characterized in that: the furnace body (1) is connected with the coke pushing system (9) through a cooling system, the cooling system is provided with a cooling channel communicated with the discharging channel and the coke pushing system (9), and the cooling channel is vertically arranged.
2. The semi-coke waste heat recycling system according to claim 1, wherein the cooling system is provided with two stages, namely a primary cooling system and a secondary cooling system, and the secondary cooling system is connected with the furnace body (1) through the primary cooling system.
3. The semi-coke waste heat recycling system as claimed in claim 2, characterized in that the primary cooling system comprises the same number of primary cooling devices as the discharging channels, the primary cooling device comprises an external upper header and an external lower header (14), the external upper header is connected with the external lower header (14) through a cooling tube array (6), the external upper header is provided with an external cooling water outlet, and the external lower header (14) is provided with an external cooling water inlet;
the outer upper collecting pipe and the outer lower collecting pipe (14) are both annular arranged pipelines, the cooling tubes (6) are arranged in a plurality of numbers, the cooling tubes (6) are arranged along the circumferential direction of the outer upper collecting pipe or the outer lower collecting pipe (14), two adjacent cooling tubes (6) are connected through a connecting plate (7), the cooling tubes (6) and the connecting plate (7) form a circumferentially sealed cylindrical area, the outer upper collecting pipe and the outer lower collecting pipe (14) form a primary cooling channel, and the primary cooling channel is vertically arranged;
an internal cooling device is also arranged in the primary cooling channel.
4. The semi-coke waste heat recycling system as recited in claim 3, wherein the internal cooling device comprises two internal upper headers (15) and internal lower headers (16) which are parallel to each other and arranged in a vertical direction, and the internal upper headers (15) and the internal lower headers (16) are straight pipes; the internal upper header (15) is communicated with the internal lower header (16) through a vertical tube array (17) arranged between the internal upper header (15) and the internal lower header (16), the internal lower header (16) is provided with an internal cooling water inlet (10), and the internal upper header (15) is provided with an internal cooling water outlet.
5. The semi-coke waste heat recycling system according to claim 3, wherein the cooling tubes (6) comprise three sections of pipelines which are communicated with each other, namely a vertically arranged middle tube (11), an upper end tube (13) and a lower end tube (12) which are connected to two ends of the middle tube (11), and the upper end tube (13) and the lower end tube (12) are obliquely arranged;
the upper end pipes (13) are respectively connected with an external upper header through cooling connecting pipes which are vertically arranged and one ends of which extend into the furnace body (1);
the connecting plate (7) is also provided with a plurality of nozzles, and the nozzles are positioned on the connecting plate (7) between two adjacent upper end pipes (13).
6. The semi-coke waste heat recycling system according to claim 3, wherein the external upper header comprises two longitudinal pipes (4) and two horizontal pipes (3), the two longitudinal pipes (4) are arranged along the length of the pyrolysis wall (2), the two longitudinal pipes (4) are respectively arranged at two sides of the same material channel and are fixedly connected with the pyrolysis walls (2) at two sides of the material channel;
the horizontal pipes (3) are arranged across the material channel, two ends of the two horizontal pipes (3) are respectively connected with the same end of the two longitudinal pipes (4) through two vertical pipes (5), and the external cooling water outlet is arranged on one horizontal pipe (3); one end of the discharge channel is located in the area between the two horizontal pipes (3) and the two longitudinal pipes (4).
7. The semi-coke waste heat recycling system as claimed in claim 6, wherein the distance between adjacent vertical tubes (17) is 7-10cm, and the distance between adjacent cooling tubes (6) is 7-10 cm.
8. The semi-coke waste heat recycling system according to claim 7, wherein the longitudinal pipes (4) are all arranged in the furnace body (1).
9. The semi-coke waste heat recycling system according to any one of claims 3 to 8, wherein the secondary cooling system comprises annular cylindrical water cooling jackets (8) with the same number as the primary cooling devices, the lower parts of the water cooling jackets (8) are provided with secondary cooling water inlets, and the upper parts of the water cooling jackets (8) are provided with secondary cooling water outlets; the central columnar area of the water cooling jacket (8) is a secondary cooling channel, one end of the secondary cooling channel on the water cooling jacket (8), which faces the primary cooling device, is communicated with the primary cooling channel on the primary cooling device connected with the water cooling jacket (8), and the other end of the secondary cooling channel on the water cooling jacket (8) is communicated with the coke pushing system (9).
10. The semi-coke waste heat recycling system as claimed in claim 9, wherein one side of the external lower header (14) facing the secondary cooling system is fixedly connected with a flange, the other side of the secondary cooling system facing the external lower header (14) is fixedly connected with another flange, and the two flanges are overlapped and fixedly connected with each other.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921009977.4U CN210215232U (en) | 2019-07-02 | 2019-07-02 | Semi coke waste heat recycling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921009977.4U CN210215232U (en) | 2019-07-02 | 2019-07-02 | Semi coke waste heat recycling system |
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| CN210215232U true CN210215232U (en) | 2020-03-31 |
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| CN201921009977.4U Active CN210215232U (en) | 2019-07-02 | 2019-07-02 | Semi coke waste heat recycling system |
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