CN104312598A - Semicoke producing system - Google Patents
Semicoke producing system Download PDFInfo
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- CN104312598A CN104312598A CN201410602066.8A CN201410602066A CN104312598A CN 104312598 A CN104312598 A CN 104312598A CN 201410602066 A CN201410602066 A CN 201410602066A CN 104312598 A CN104312598 A CN 104312598A
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- semicoke
- water
- coke
- cold
- gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/04—Wet quenching
- C10B39/06—Wet quenching in the oven
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/04—Wet quenching
- C10B39/08—Coke-quenching towers
Abstract
The invention discloses a semicoke producing system. The semicoke producing system comprises a dry distilling system, a water sprinkling cooling device, a coke dry quenching device and a semicoke collecting device, wherein the dry distilling system comprises a semicoke outlet; the water sprinkling cooling device comprises a first hot semicoke feeding port connected with the semicoke outlet of the dry distilling system, and a first cold semicoke discharging port and a water gas exhaust port; the coke dry quenching device comprises a second hot semicoke feeding port connected with the first cold semicoke discharging port, and a second cold semicoke discharging port and a coke quenching gas inlet; the semicoke collecting device comprises a collecting feed port connected with the second cold semicoke discharging port. The water sprinkling cooling device is arranged in front of the coke dry quenching device, so that hot semicoke is cooled by water sprinkling before coke dry quenching; through two-step coke quenching, the hot semicoke cooling efficiency can be effectively improved; the hot semicoke is cooled in a sprinkling way, so that the hot semicoke can be prevented from cracking in case of shock cooling to generate a large amount of fine coal; the semicoke producing system achieves closed coke quenching, so that the environmental pollution can be reduced.
Description
Technical field
The present invention relates to coal chemical technology, in particular to a kind of semicoke production system.
Background technology
China's energy structure is that rich coal is oil-poor, the low rank coal organic C storage such as brown coal, long-flame coal, non-caking coal account for the half of China's coal total reserves, seeking under the petroleum replacing energy and Efficient Development utilize the promotion of low rank coal carbon resource trend, in low coal rank coal, low-temperature pyrolysis technical development is accelerated, particularly brown coal, long-flame coal low-temperature pyrolysis achieve certain industrial application achievement, just progressively move to maturity.Lignite semi-coke after destructive distillation from dry distillation reactor device out after temperature can reach more than 400 DEG C, and active high, if it does not cooled rapidly, very easily there is spontaneous combustion, cause the accident.The semicoke process for cooling of tradition semicoke industry is comparatively ripe, and be mainly divided into coke wet quenching, dry coke quenching two kinds, red for high temperature Jiao directly enters in coke quenching pool and cooled by the former, and quenching pool inner water has again certain liquid level, ensures that the water-gas in quenching process can not overflow; The latter utilizes cold rare gas element (nitrogen or cycle flue gas) to be cooled with red burnt heat exchange dry putting out in equipment.
But, for the semicoke of this high reactivity of lignite semi-coke, low mechanical strength, according to the defect of coke wet quenching technique except the low and high water consumption of utilization rate of waste heat, also there is following defect: 1. after red Jiao meets water quenching, red burnt part reacts on the one hand, causes semicoke product charcoal to lose; Semicoke quenching is broken on the other hand, and lump coke output reduces, and produces a large amount of smalls; 2. in quenching process, the organism such as tar, phenol dissolves in water, and containing a large amount of coal dust in waste water, water treatment difficulty is very big; 3. lignite semi-coke hole is flourishing, exists and obviously relapses, affect product quality; 4. coke wet quenching process difficult realizes airtight, and occupational health environment is poor, and easily to environment.Though adopt dry coke quenching in the defect to a certain degree overcoming coke wet quenching technology, but because lignite semi-coke is different from the self-characteristics such as high, the easy spontaneous combustion of activity of other semicokes, physical strength be low, use dry coke quenching technique also existing defects: 1. for ensureing heat exchange efficiency, coke quenching auxiliary is comparatively huge, single complete equipment processing power is lower, and facility investment is high; 2. dry coke quenching process control is comparatively complicated, and coke discharging temperature is high, particularly for highly active lignite semi-coke, if temperature cannot reach less than 50 DEG C, still very easily spontaneous combustion occurs; 3. after gas-solid heat exchange, recuperated gas very easily carries a large amount of ultrafine powder, and the intractability of follow-up dust-removal system increases; 4. need supplementary supporting indifferent gas to supplement (steam or nitrogen) and waste-heat recovery device, investment increases, and affects Project Economy Benefit.In a word, there is the problem that equipment cost is high, cooling performance is poor in existing semicoke process for cooling.
For overcoming the defect of above two kinds of techniques, the present invention intends providing the semicoke production system that a kind of low cost, cooling performance are higher.
Summary of the invention
The present invention aims to provide a kind of semicoke production system, to solve in prior art semicoke production system to the problem of the cooling performance difference of semicoke.
To achieve these goals, according to an aspect of the present invention, provide a kind of semicoke production system, it comprises distillation system, Water spray refrigerating unit, dry coke quenching auxiliary and semicoke collection device; Wherein, distillation system has semicoke outlet; Water spray refrigerating unit has the first hot semicoke opening for feed exporting with the semicoke of distillation system and be connected, and the first cold semicoke discharge port and water-gas venting port; Dry coke quenching auxiliary has the second hot semicoke opening for feed that semicoke discharge port cold with first is connected, and the second cold semicoke discharge port and quenching gas feed; And semicoke collection device has the collection opening for feed that semicoke discharge port cold with second be connected.
Further, Water spray refrigerating unit comprises fixing body of heater, fire grate, water spray system and coal moving plate; Wherein, fixing body of heater is provided with the first hot semicoke opening for feed, the first cold semicoke discharge port and water-gas venting port; Fire grate can be rotatably set in fixing body of heater along the axle center of fixing body of heater, between the first hot semicoke opening for feed and the first cold semicoke discharge port, fire grate has in order to accept and to carry the stone or metal plate for standing a stove on as a precaution against fire of the hot semicoke entered by the first hot semicoke opening for feed, and being arranged on stone or metal plate for standing a stove on as a precaution against fire, and the coke outlet corresponding with the first cold semicoke discharge port; Water spray system is provided with the mouth spray extending to fixing furnace interior, for the hot semicoke spraying cooling water be positioned on fire grate; Coal moving plate is arranged on the top of fire grate in fixing body of heater, is welded on fixing body of heater, and coal moving plate between coke outlet and the first cold semicoke discharge port, and forms hot semicoke circulation passage between coal moving plate and fire grate.
Further, coke outlet and the first cold semicoke discharge port are arranged accordingly along the axle center fixing body of heater.
Further, fire grate also comprises the discharge pipe be connected with coke outlet, and discharge pipe extends to the outside of fixing body of heater through the first cold semicoke discharge port.
Further, coal moving plate is multiple, and the traffic direction of multiple coal moving plate hot semicoke above fire grate sets gradually.
Further, water seal is adopted to seal between the outside of stone or metal plate for standing a stove on as a precaution against fire and the inwall of fixing body of heater in fire grate.
Further, Water spray refrigerating unit also comprises drive-motor, and drive-motor is connected with fire grate, drives fire grate to rotate.
Further, dry coke quenching auxiliary is scraper conveyor, and the quenching gas feed in dry coke quenching auxiliary exports with the outer smoke-uptake gas of distillation system and is connected.
Further, semicoke production system also comprises water-gas refining plant, and the entrance of water-gas refining plant is connected with the water-gas venting port of Water spray refrigerating unit.
Further, water-gas refining plant comprises coal dust washer and steam condenser; Wherein, coal dust washer has washer inlet mouth and washer venting port, and washer inlet mouth is connected with water-gas venting port; Steam condenser has steam condenser inlet mouth and condenser exhaust gas mouth, and steam condenser inlet mouth is connected with washer venting port, and condenser exhaust gas mouth is connected with water-gas holding tank inlet mouth.
Further, condenser exhaust gas mouth is connected with the heating plant import of distillation system.
Further, semicoke production system also comprises process water treatment unit, and process water treatment unit has the first fluid inlet, the second fluid inlet, the first liquid outlet, the second liquid outlet and coal dust discharge port; Wherein: the first fluid inlet exports with the coal dust washing water of coal dust washer and is connected, and the first liquid outlet is connected with the washing water import of coal dust washer; Second fluid inlet is connected with the condensation-water drain of steam condenser; Second liquid outlet is connected with the water spray system of Water spray refrigerating unit.
Further, semicoke production system also comprises Coal Briquetting System, for the coal dust filter residue produced in semicoke and/or process water treatment unit is carried out moulded coalification.
Apply semicoke production system of the present invention.Above-mentioned semicoke production system, was provided with Water spray refrigerating unit before dry coke quenching auxiliary, making hot semicoke entering before dry coke quenching auxiliary carries out dry coke quenching, can be introduced in Water spray refrigerating unit and carrying out Water spray cooling.Two step extinguishing techniques so effectively can improve the cooling efficiency of hot semicoke.Simultaneously, carrying out soaking the method cooled compared to hot semicoke being directly placed in water coolant, adopting the mode cooling heat semicoke of spray, except can significantly save except water consumption, also help and prevent hot semicoke from occurring breaking under the situation of quenching, produce the problem of a large amount of smalls.In addition, above-mentioned semicoke production system can also make quenching process carry out in closed environment, is conducive to reducing environmental pollution.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows according to the semicoke production system refrigerating unit in one embodiment of the present invention; And
Fig. 2 shows according to the Water spray refrigerating unit in the semicoke production system in one embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Introducing as background technology part, there is the problem of cooling performance difference in existing semicoke process for cooling.In order to address this problem, inventor provides a kind of semicoke production system, and as shown in Figure 1, it comprises distillation system 10, Water spray refrigerating unit 20, dry coke quenching auxiliary 30 and semicoke collection device 40; Wherein, distillation system 10 has semicoke outlet 110; Water spray refrigerating unit 20 has and exports 110 the first hot semicoke opening for feeds 211 be connected with the semicoke of distillation system 10, and the first cold semicoke discharge port 212 and water-gas venting port 213; Dry coke quenching auxiliary 30 has the second hot semicoke opening for feed that semicoke discharge port 212 cold with first is connected, and the second cold semicoke discharge port and quenching gas feed 330; And semicoke collection device 40 has the collection opening for feed that semicoke discharge port cold with second be connected.
Above-mentioned semicoke production system provided by the present invention, was provided with Water spray refrigerating unit 20 before dry coke quenching auxiliary 30, making hot semicoke entering before dry coke quenching auxiliary 30 carries out dry coke quenching, can be introduced in Water spray refrigerating unit 20 and carrying out Water spray cooling.Two step extinguishing techniques so effectively can improve the cooling efficiency of hot semicoke.Simultaneously, carrying out soaking the method cooled compared to hot semicoke being directly placed in water coolant, adopting the mode cooling heat semicoke of spray, except can significantly save except water consumption, also help and prevent hot semicoke from occurring breaking under the situation of quenching, produce the problem of a large amount of smalls.In addition, above-mentioned semicoke production system can also make quenching process carry out in closed environment, is conducive to reducing environmental pollution.
Above-mentioned Water spray refrigerating unit 20 provided by the present invention can adopt arbitrary water spray system, as long as can provide spraying cooling water by thermotropism semicoke.In a preferred embodiment, as shown in Figure 2, it comprises: fixing body of heater 210, fire grate 220, water spray system 230 and coal moving plate 240; Wherein, fixing body of heater 210 is provided with the first hot semicoke opening for feed 211, first cold semicoke discharge port 212 and water-gas venting port 213; Fire grate 220 can be rotatably set in fixing body of heater 210 along the axle center of fixing body of heater 210, between the first hot semicoke opening for feed 211 and the first cold semicoke discharge port 212, fire grate 220 has in order to accept and to carry the stone or metal plate for standing a stove on as a precaution against fire of the hot semicoke entered by the first hot semicoke opening for feed 211, and being arranged on stone or metal plate for standing a stove on as a precaution against fire, and the coke outlet 221 corresponding with the first cold semicoke discharge port 212; Water spray system 230 is provided with the mouth spray 231 extending to fixing body of heater 210 inside, for the hot semicoke spraying cooling water be positioned on fire grate 220; Coal moving plate 240 is arranged on the top of fire grate 220 in fixing body of heater 210, is welded on fixing body of heater 210, and coal moving plate 240 between the first hot semicoke opening for feed 211 and coke outlet 221, and forms hot semicoke circulation passage between coal moving plate 240 and fire grate 220.
In above-mentioned Water spray refrigerating unit 20 provided by the present invention, water coolant can be provided by thermotropism semicoke by water spray system 230.Carry out soaking the method cooled compared to hot semicoke being directly placed in water coolant, adopt the mode cooling heat semicoke of spray, except can significantly save except water consumption, also help and prevent hot semicoke from occurring breaking under the situation of quenching, produce the problem of a large amount of smalls.Simultaneously, rotatable fire grate 220 in said apparatus can make the hot semicoke on the different positions of the stone or metal plate for standing a stove on as a precaution against fire being positioned at fire grate 220 be subject to more homogeneous cooling, and the cold semicoke that can make to cool rear formation is moved by the rotation of fire grate 220 coke outlet 221 to fire grate 220, and then the semicoke pulverizing problem because External Force Acting occurs can be reduced.Coal moving plate 240 is welded on fixing body of heater 210, when fire grate 220 rotates, hot semicoke can be laid on fire grate by coal moving plate 240 more equably, and hot semicoke can be delivered to center coke outlet 212 by outside and discharge, and can be discharged by hot semicoke faster by controlling rotating speed.In addition, under the effect of coal moving plate 240, the hot semicoke be deposited on fire grate 120 can be spread out rapidly, makes hot semicoke can radiating and cooling equably.Meanwhile, these coal moving plates 240 can also make cooled semicoke move along the lateral coke outlet 221 of fire grate 220, semicoke are lowered the temperature continuously, discharging.In addition, coal moving plate 240 and the fire grate 220 rotated are carried out with the use of, the reactive force produced semicoke is less, and action direction is fixed, and can reduce the Pulverization ratio of semicoke.Particularly, by maintaining a certain distance between coal moving plate 240 and fire grate 220, regulate hot semicoke bed thickness, operating device is exerted oneself.Many-sided factor is all conducive to the cooling efficiency and the cooling quality that improve semicoke above, and meanwhile, this appliance arrangement is simple, easy to operate, is applicable to the large scale continuous prod of semicoke.
For making semicoke more easily spread out, coal moving plate 240 is multiple, and multiple coal moving plate 240 sets gradually along the traffic direction of hot semicoke above fire grate 220.Multiple referring to herein is greater than one.Those skilled in the art have the ability to select the concrete set-up mode of multiple coal moving plate 240, such as, the direction of motion of multiple coal moving plate 240 along hot semicoke can be arranged with the change of different angles.Preferably, coke outlet 221 and the first cold semicoke discharge port 212 are arranged accordingly along the axle center of fixing body of heater 210.Move to coke outlet 221 for the ease of cold semicoke, more preferably stone or metal plate for standing a stove on as a precaution against fire has by lateral coke outlet 221 direction gradually towards the inclined surface that cold semicoke discharge port 212 extends.
The instruction above-mentioned according to the present invention, those skilled in the art have the ability to select the concrete discharge method of cold semicoke.Preferably, above-mentioned fire grate 220 also comprises the discharge pipe be connected with coke outlet 221, and discharge pipe extends to the outside of fixing body of heater 210 through the first cold semicoke discharge port 212.Again preferably, water seal 222 is adopted to seal between the outside of stone or metal plate for standing a stove on as a precaution against fire and the inwall of fixing body of heater 210 in fire grate 220.While adopting water seal 222 to seal the stone or metal plate for standing a stove on as a precaution against fire of fire grate 220 and fixing body of heater 210 inwall, furnace interior stopping property can be improved, preventing hot semicoke spontaneous combustion, fire grate 220 can also be made more successfully to rotate.In addition, Water spray refrigerating unit 20 also comprises drive-motor, and drive-motor is connected with fire grate 220, drives fire grate 220 to rotate.
In above-mentioned Semi-coke cooling device of the present invention, the injection flow rate of water spray system 230 is higher, and the speed of cooling of hot semicoke is faster, but water loss is higher, the water content of semicoke is also higher; The rotating speed of fire grate 220 is higher, and semicoke is faster close to the speed of fire grate 220 coke outlet 221, and during discharging, the temperature of semicoke is higher.For the consideration of balance water loss, semicoke water content and temperature of the discharging of the coke, above-mentioned fire grate 220 rotates under motor drives.And by going out to arrange temperature sensing device at the cold semicoke discharge port 212 of coke outlet 221 or the first, in order to combed by the temperature-controlled oven that the discharges of the coke rotating speed of 220 and the injection flow rate of water spray system 230.Those skilled in the art have the ability to select concrete temperature sensing device, such as, preferably arrange thermopair at coke outlet 221 or the first cold semicoke discharge port 212 place, in order to measure the temperature of the discharging of the coke of semicoke.According to this temperature of the discharging of the coke, the adjustment injection flow rate of water spray system 230 and the speed of rotation of fire grate 220.
Above-mentioned semicoke production system provided by the present invention, dry coke quenching auxiliary 30 is increased further after above-mentioned Water spray refrigerating unit 20, the cold semicoke formed after cooling water spraying temp lowering can be lowered the temperature further, make the temperature of semicoke be down to lesser temps further.This is conducive to preventing the too high easy spontaneous combustion problems caused of semicoke Yin Wendu further.Particularly for the higher lignite semi-coke of activity, cooling is conducive to ensureing the output of semicoke and the security of production again.Meanwhile, adopt spray quenching and dry coke quenching two kinds of modes jointly to cool hot semicoke, water coolant water loss, the water content of cold semicoke and temperature of the discharging of the coke can be balanced further.Particularly, the dry coke quenching auxiliary that dry coke quenching auxiliary 30 can be well known to those skilled in the art, preferably, as shown in Figure 1, this dry coke quenching auxiliary 30 is scraper conveyor, in order to reduce semicoke temperature further, with cooling jacket on this dry coke quenching auxiliary 30, water coolant enters from the water-in 310 of cooling jacket, from the water outlet 320 of cooling jacket out.More preferably, the quenching gas feed 330 in dry coke quenching auxiliary 30 exports with the outer smoke-uptake gas of distillation system 10 and is connected.After this outer smoke-uptake gas enters from quenching gas feed 330, discharge from quenching pneumatic outlet 340.Containing more moisture content in the outer smoke-uptake gas of distillation system 10, utilize it as quenching gas, the cooling performance of semicoke can be improved further.Meanwhile, the stack gas through heat exchange has higher temperature, and this is conducive to the corrosive nature reducing its external smoke evacuation chimney.
Apply above-mentioned semicoke production system of the present invention, just can reduce the production cost of semicoke, improve the efficiency that semicoke is produced.In a preferred embodiment, as shown in Figure 1, above-mentioned semicoke production system also comprises water-gas refining plant, and the entrance of water-gas refining plant is connected with the water-gas venting port 213 of Water spray refrigerating unit 20.When carrying out spraying cooling with water spray system 230 to hot semicoke, the semicoke that inevitably some temperature is higher and the water coolant of spray react, and generate water-gas.Utilize water-gas refining plant to carry out purifying treatment to water-gas, the impurity coal dust in water-gas can be removed, make water-gas have higher degree, use as him to be recovered.
In above-mentioned semicoke production system of the present invention, the water-gas refining plant of employing can be the water-gas refining plant that those skilled in the art are usual.One preferred embodiment in, above-mentioned water-gas refining plant comprises coal dust washer 50 and steam condenser 60, and coal dust washer 50 has washer inlet mouth and washer venting port, and washer inlet mouth is connected with water-gas venting port 213; Steam condenser 60 has steam condenser inlet mouth and condenser exhaust gas mouth 620, and steam condenser inlet mouth is connected with washer venting port, and condenser exhaust gas mouth 620 is connected with water-gas holding tank inlet mouth.Coal dust washer 50 is for removing the coal dust in the water-gas of water-gas venting port 213 discharge of Semi-coke cooling device 10, and steam condenser 60 is for removing the water vapor in water-gas.After the operation that coal dust is removed and water vapour is removed, the purity of water-gas is able to effective raising.In the process of actually operating, recirculated cooling water can be set in steam condenser 60, make it enter from steam condenser entrance of cooling water 640, discharge from steam condenser cooling water outlet 630.
From above-mentioned water-gas refining plant, purify the water-gas obtained can directly reclaim, use as clean energy.One preferred embodiment in, above-mentioned condenser exhaust gas mouth 620 is connected with the heating plant import 120 of distillation system 10, for distillation system 10 supplemental heat source.In addition, for the consideration of save energy, above-mentioned semicoke production system also comprises process water treatment unit 70, and process water treatment unit 70 has the first fluid inlet 710, second fluid inlet 720, first liquid outlet 730, second liquid outlet 740 and coal dust discharge port 750; Wherein, the first fluid inlet 710 exports 530 with the coal dust washing water of coal dust washer 50 and is connected, and the first liquid outlet 730 is connected with the washing water import 520 of coal dust washer 50; Second fluid inlet 720 is connected with the condensation-water drain 610 of steam condenser 60; Second liquid outlet 740 is connected with the spray water system 230 of Water spray refrigerating unit 20.The water of condensation of discharging in the coal dust washing water of discharging in coal dust washer 50 and steam condenser 60 can be carried out circulation and stress use, to reduce water loss by above-mentioned setting.Thus reduction energy consumption, reduce production cost.In the process run continuously, supplementing of water coolant and/or coal dust washing water can also be carried out further by the 3rd fluid inlet 760.
After hot semicoke enters Water spray refrigerating unit 20 and dry coke quenching auxiliary 30 carries out cooling process, the cold semicoke obtained can be directly used in prepares moulded coal.Preferably, above-mentioned semicoke production system also comprises Coal Briquetting System 80, for the coal dust filter residue produced in semicoke and/or process water treatment unit 70 is carried out moulded coalification.
Be described in further detail the present invention below in conjunction with specific embodiment, these embodiments can not be interpreted as restriction the present invention scope required for protection.
Embodiment 1:
Semicoke production system is adopted to produce lignite semi-coke.Wherein, the outside diameter fixing body of heater in Water spray refrigerating unit is 7000mm, and highly (containing feed and exhaust tube) is 7200mm; Be provided with rotatable fire grate in fixing body of heater, fire grate and fixing inboard wall of furnace body water seal seal, and are provided with two coal moving plates above fire grate; The main raw of Semi-coke cooling device is plain carbon stool+refractory materials, gross weight about 80 tons.
The temperature produced by distillation system is 460 DEG C, and size range is that the lignite semi-coke throwing of 10 ~ 23m cools to Water spray refrigerating unit.The semicoke being 97 DEG C by the temperature obtained after cooling is again put into scraper conveyor and is again cooled, and adopts distillation system discharged gas fume as the dry coke quenching gas in scraper conveyor, obtains the lignite semi-coke that temperature is 46 DEG C.
The lignite semi-coke of above-mentioned 46 DEG C is carried out accumulating, in storage and transport process, spontaneous combustion does not occur.After testing, the water content of finished product semicoke is 6 ~ 9wt%, net calorific value be 5500 ~ 6000 kilocalories/kilogram, size range is 5 ~ 20m.In semicoke process of cooling, water loss is 30 ~ 60 kg/ton.Water-gas supplies amount to be 362 ~ 450 kgs/hr outward, and water-gas temperature is 90 DEG C, and component is: CO:22wt%, CH
4: 12wt%, not solidifying burning gas: 14wt%.Single cover Semi-coke cooling device designing treatment ability is 500 tons/day, year processing power be 150,000 tons/year.
Embodiment 2:
Semicoke production system is adopted to produce lignite semi-coke.Wherein, the outside diameter fixing body of heater in Water spray refrigerating unit is 18000mm, and highly (containing feed and exhaust tube) is 12200mm; Be provided with rotatable fire grate in fixing body of heater, fire grate and fixing inboard wall of furnace body water seal seal, and are provided with four coal moving plates above fire grate; The main raw of Semi-coke cooling device is plain carbon stool+refractory materials, and the material of fire grate is 304 stainless steels, gross weight about 475 tons.
The temperature produced by distillation system is 535 DEG C, and size range is that the lignite semi-coke throwing of 13 ~ 20m cools to Semi-coke cooling device.The semicoke being 107 DEG C by the temperature obtained after cooling is again put into scraper conveyor and is again cooled, and adopts distillation system discharged gas fume as the dry coke quenching gas in scraper conveyor, obtains the lignite semi-coke that temperature is 47 DEG C.
The lignite semi-coke of above-mentioned 47 DEG C is carried out accumulating, in storage and transport process, spontaneous combustion does not occur.After testing, the water content of finished product semicoke is 7 ~ 10wt%, net calorific value be 5500 ~ 6000 kilocalories/kilogram, size range is 7 ~ 13m.In semicoke process of cooling, water loss is 90 ~ 110 kg/ton.Water-gas supplies amount to be 1600 ~ 1800 kgs/hr outward, and water-gas temperature is 97 DEG C, and component is: CO:21wt%, CH
4: 15wt%, not solidifying burning gas: 13wt%.Single cover Semi-coke cooling device designing treatment ability is 2000 tons/day, year processing power be 1,500,000 tons/year.
From above data description, can find out, adopt Semi-coke cooling device provided by the present invention to cool lignite semi-coke, cooling efficiency is higher, and water loss is lower.Meanwhile, adopt semicoke production system provided by the present invention, utilize spraying cooling and scraper conveyor to cool again and combine, the lignite semi-coke prepared has lower water content, higher granularity and higher net calorific value.Show that lignite semi-coke has higher quality.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a semicoke production system, is characterized in that, comprising:
Distillation system (10), has semicoke outlet (110);
Water spray refrigerating unit (20), there is the first hot semicoke opening for feed (211) exporting (110) with the semicoke of described distillation system (10) and be connected, and the first cold semicoke discharge port (212) and water-gas venting port (213);
Dry coke quenching auxiliary (30), has the second hot semicoke opening for feed be connected with described first cold semicoke discharge port (212), and the second cold semicoke discharge port and quenching gas feed (330); And
Semicoke collection device (40), has the collection opening for feed be connected with described second cold semicoke discharge port.
2. semicoke production system according to claim 1, is characterized in that, described Water spray refrigerating unit (20) comprising:
Fixing body of heater (210), is provided with described first hot semicoke opening for feed (211), described first cold semicoke discharge port (212) and described water-gas venting port (213);
Fire grate (220), axle center along described fixing body of heater (210) can be rotatably set in described fixing body of heater (210), be positioned between described first hot semicoke opening for feed (211) and described first cold semicoke discharge port (212), described fire grate (220) has in order to accept and to carry the stone or metal plate for standing a stove on as a precaution against fire of the hot semicoke entered by described first hot semicoke opening for feed (211), and is arranged on coke outlet (221) on described stone or metal plate for standing a stove on as a precaution against fire and corresponding with described first cold semicoke discharge port (212);
Water spray system (230), is provided with and extends to the inner mouth spray (231) of described fixing body of heater (210), for the hot semicoke spraying cooling water be positioned on described fire grate (220);
Coal moving plate (240), be arranged on the top of fire grate (220) described in described fixing body of heater (210), be fixed on described fixing body of heater (210), described coal moving plate (240) is positioned between described coke outlet (221) and described first cold semicoke discharge port (212), and forms hot semicoke circulation passage between described coal moving plate (240) and described fire grate (220).
3. semicoke production system according to claim 2, is characterized in that, described coke outlet (221) and described first cold semicoke discharge port (212) are arranged accordingly along the axle center of described fixing body of heater (210).
4. semicoke production system according to claim 2, it is characterized in that, described fire grate (220) also comprises the discharge pipe be connected with described coke outlet (221), and described discharge pipe extends to the outside of described fixing body of heater (210) through described first cold semicoke discharge port (212).
5. semicoke production system according to claim 2, is characterized in that, described coal moving plate (240) is for multiple, and multiple described coal moving plate (240) sets gradually along the traffic direction of the hot semicoke in described fire grate (220) top.
6. semicoke production system according to claim 2, is characterized in that, adopts water seal (222) to seal between the outside of the middle stone or metal plate for standing a stove on as a precaution against fire of described fire grate (220) and the inwall of described fixing body of heater (210).
7. semicoke production system according to claim 2, it is characterized in that, described Water spray refrigerating unit (20) also comprises drive-motor, and described drive-motor is connected with described fire grate (220), drives described fire grate (220) to rotate.
8. semicoke production system according to any one of claim 1 to 7, it is characterized in that, described dry coke quenching auxiliary (30) is scraper conveyor, and the quenching gas feed (330) in described dry coke quenching auxiliary (30) exports with the outer smoke-uptake gas of described distillation system (10) and is connected.
9. semicoke production system according to claim 1, it is characterized in that, described semicoke production system also comprises water-gas refining plant, and the entrance of described water-gas refining plant is connected with the water-gas venting port (213) of described Water spray refrigerating unit (20).
10. semicoke production system according to claim 9, is characterized in that, described water-gas refining plant comprises:
Coal dust washer (50), has washer inlet mouth and washer venting port, and described washer inlet mouth is connected with described water-gas venting port (213);
Steam condenser (60), there is steam condenser inlet mouth and condenser exhaust gas mouth (620), described steam condenser inlet mouth is connected with described washer venting port, and described condenser exhaust gas mouth (620) is connected with water-gas holding tank inlet mouth.
11. semicoke production systems according to claim 10, is characterized in that, described condenser exhaust gas mouth (620) is connected with the heating plant import (120) of described distillation system (10).
12. semicoke production systems according to claim 10, it is characterized in that, described semicoke production system also comprises process water treatment unit (70), and described process water treatment unit (70) has the first fluid inlet (710), the second fluid inlet (720), the first liquid outlet (730), the second liquid outlet (740) and coal dust discharge port (750); Wherein:
Described first fluid inlet (710) exports (530) with the coal dust washing water of described coal dust washer (50) and is connected, and described first liquid outlet (730) is connected with the washing water import (520) of described coal dust washer (50);
Described second fluid inlet (720) is connected with the condensation-water drain (610) of described steam condenser (60);
Described second liquid outlet (740) is connected with the water spray system (230) of described Water spray refrigerating unit (20).
13. semicoke production systems according to claim 1, is characterized in that, described semicoke production system also comprises Coal Briquetting System (80), for the coal dust filter residue produced in semicoke and/or described process water treatment unit is carried out moulded coalification.
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