CN102537914B - Method and device for carrying out dry quenching and recovering heat energy in radiation and conduction heat absorption mode - Google Patents
Method and device for carrying out dry quenching and recovering heat energy in radiation and conduction heat absorption mode Download PDFInfo
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- CN102537914B CN102537914B CN201110425365.5A CN201110425365A CN102537914B CN 102537914 B CN102537914 B CN 102537914B CN 201110425365 A CN201110425365 A CN 201110425365A CN 102537914 B CN102537914 B CN 102537914B
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Abstract
The invention relates to a method and a device for carrying out dry quenching and recovering heat energy in a radiation and conduction heat absorption mode. In a closed container, red cokes are subjected to heat transfer to generate steam by heat radiation, or metal heat transfer, or a combination method of firstly carrying out heat radiation and then carrying out heat transfer. By indirect heat transfer, the heat energy stored in the red cokes with the temperature of 1,000 DEG C is converted into the high temperature steam to be recovered. The device at least consists of a dry quenching furnace, a steam generating system, a water circulation system and a low temperature coke discharging system. A radiation heat transfer pipe for receiving high temperature radiant heat and a heat conduction and transfer pipe which is in direct contact with the cokes are arranged in the dry quenching furnace. Water or the steam is filled in both the radiation heat transfer pipe and the heat conduction and transfer pipe. A fluid inlet side in the radiation heat transfer pipe is connected with a fluid outlet side of the heat conduction and transfer pipe. In the practical engineering, the specific construction of the steam generating system can be designed and arranged according to a structure of a steam boiler which is widely applied. The method and the device have the characteristics of simple equipment, low operating cost, high energy recovery rate and the like.
Description
Technical field
The CDQ that the present invention relates to a kind of radiation and conductive heat sink formula coke reclaims the method and apparatus that heat energy directly utilizes steam or generating, belongs to energy recovery and utilizes and field of Environment Protection; Particularly radiation and conductive heat sink formula dry coke quenching reclaim the method and apparatus of heat energy.
Background technology
China is coke production big country, and high-temperature coke (red coke) needs to lower the temperature at short notice, i.e. quenching.Contain a large amount of heat energy in red coke, if can recycle, energy-saving and emission-reduction can be accomplished simultaneously.Main based on the wet quenching of cooling of sprinkling water so far, though this method equipment is simple, quenching speed is fast, have lost red coke with a large amount of heat energy, also can cause environmental pollution.At present, have developed and cooled with nitrogen Dry Quenching Technology that red coke carries out generating electricity and be successfully applied in industrial practice.But the equipment of this technology is complicated, and equipment investment is high, and operating cost is also high, in actual employing, difficulty is larger.Nitrogen cooling dry coke quenching method equipment and the high main cause of operating cost are nitrogen circulation, dedusting, the aspects such as nitrogen consumption, so, if set about from the change of the type of cooling of red coke just likely reaching the object reducing equipment investment and operating cost.Therefore, the cooling of the red coke of exploitation non-pneumatic cooled, extracts heat and the dry cooling method and apparatus be used just seems particularly important.
Summary of the invention
The object of the present invention is to provide a kind of CDQ of coke to reclaim the method for heat, by radiation and conductive heat sink formula dry quenching method, the heat energy that quenching process produces is reclaimed.Compared with other coke quenching method, this method has that equipment is simple, operating cost is low, energy recovery efficiency is high, and does not produce the features such as secondary environmental pollution.
The present invention adopts following technical scheme to realize:
The method that coke CDQ of the present invention reclaims heat energy is, in airtight container, red coke is by heat radiation or carry out heat transmission by heat conducting combined method after the heat transfer of metal species or first heat radiation and produce steam.The thermal energy that the red coke (being called red coke) taken on a red color temperature being reached 1000 DEG C by these indirect heat transfers is contained becomes high-temperature steam, is reclaimed.
Realize the device that CDQ of the present invention reclaims the method for heat energy power-generating, be at least made up of dry stove, steam generating system, water circulation system and low-temperature coke system of discharging of putting out; Dry put out in stove be provided with receive hyperthermia radiation radiation of heat heat-transfer pipe and with coke direct contact heat conduction heat transfer pipe, radiant heat transfer pipe and heat transfer by heat conduction pipe inside all pass into water or steam, and the fluid intake side in radiant heat transfer pipe is connected with the fluid issuing side of conduction heat transfer pipe.In Practical Project, the concrete structure of steam generating system can according to the structural design of the steam boiler of extensive use and setting, as added superheat section, saturated vapor case etc.
The described dry stove that puts out is that top is provided with red coke inlet, and coke inlet place is provided with can the top cover of switch, and top is provided with that radiant heat receives heat-transfer pipe, bottom is provided with heat transfer by heat conduction pipe, bottom arranges low-temperature coke outlet; The coke of heat radiation section is from up to down moved by inclination chute or vertical channel or transfers coke by rotatable disk and rotating circular disk plural section can be arranged in series or transfer coke by mechanically operated belt travel mechanism and belt is transferred and can plural section be arranged in series, and coke relies on gravity slowly movement from top to bottom in heat transfer section; The radiation receiving tube of radiant heat transfer section is at the top spatial placement of coke, and described radiation receiving tube does not directly contact with coke, and inclination chute or vertical chute receive between hyperthermia radiation radiation of heat heat-transfer pipe and coke and be provided with the grid of isolating coke.What coke inlet place was arranged can open by switch top cover in loading coke process, closes, isolated air after loading procedure completes.The on-off mode of top cover of switch can there is double-open type, also can have movable type, or rotary etc., to its mode without special restriction.
Its feature is coated with the coating of strengthening receiver radiation heat at the pipe outer wall of radiant heat transfer pipe, thermal radiation absorption rate >=0.95 of its dope layer.By radiation paint, the radiant heat of the red coke of heat-transfer pipe efficient reception, makes red coke fast cooling.Also unrestricted to the composition of its coating, as long as stable, that thermal radiation absorption rate is greater than 0.95 material can be kept the temperature range of 1200 DEG C-500 DEG C.
Described inside passes between the heat transfer heat pipe of water or steam and coke and is provided with metallic walls, and metallic walls directly contacts with coke.The material being more than or equal to the thermal conductivity factor 70% of iron between metallic walls with heat pipe by thermal conductivity factor is connected as being mixed with the binding materials such as the special cement of metal dust or directly contacting.
The described dry cooling means putting out the coke that fire grate goes out, from the dry coke putting out fire grate and go out, by bottom coke layer or top spray water lower the temperature further.
The CDQ of described coke reclaims the application of heat, and the steam that the heat energy of the CDQ recovery of coke produces generates electricity.Its TRT is, steam pipe is connected with steam-electric power unit.
CDQ reclaim the method for heat can also be the high steam that produces of heat transfer process directly as steam utilization, use or raw material vapour as done thermal source.
The main body of red coke storage tank is vertical tubular or epimere is tilting cylindrical body, and hypomere is the combination of vertical cylindrical body.The angle 30 °-50 ° of the oblique simplified body of red coke storage tank epimere and horizontal plane, is conducive to coke slowly movement under gravity.
In Practical Project, high steam storage tank can be sent at the thermogenetic high steam of suction of red coke storage tank, then supply steam by storage tank to generating set or steam user.The steam pipe of multiple red coke storage tank can be had to be connected with high steam storage tank, to supply steam to steam storage tank for steam or rotation simultaneously.
The invention has the beneficial effects as follows, utilize radiation and heat transfer heat absorption to carry out CDQ, the heat of recovery is used for generating or direct as steam utilization.The energy loss that the wet quenching process solving watering cooling causes and the problem of environmental pollution brought.Compared with cooling dry quenching method with nitrogen, it is simple that this method has equipment, and operating cost is low, energy recovery rate high simultaneously.
Accompanying drawing explanation
Fig. 1: rotary disc-type radiation and the dry coke quenching technological process of conductive heat sink formula and installation drawing.
Fig. 2: belt conveying conveying radiation and the dry coke quenching technological process of conductive heat sink formula and installation drawing.
Fig. 3: the red burnt induction system of inclination chute type.
Fig. 4: epimere is tilting cylindrical body, hypomere is the red coke storage tank of vertical cylindrical body combination
I-is dry puts out stove, and system discharged by II-low-temperature coke, III-water circulation system, IV-steam generating system.The red coke storage tank of the vertical cylindrical body of 1-, the red coke of 2-, the red coke conveying device of 3-rotary disc-type, 4-radiant heat transfer grid, 5-radiant heat transfer pipe, 6-radiant heat transfer pipe and heat transfer by heat conduction pipe bindiny mechanism, 7-metallic walls, 8-heat transfer by heat conduction pipe, 9-low-temperature coke conveyer belt, 10-low-temperature coke storage tank, 11-steam pipe, 12-steam utilization unit (generating set or high steam storage tank), 13-condensed steam return duct, 14-soft water storage tank, 15-can the top cover of switch, 16-lagging casing, 17-high-pressure hydraulic pump, 18-soft water, 19-shower water, the cold coke conveyer belt of 20-, the red coke conveying device of 3a-belt, the red coke conveying device of 3b-inclination chute type, 1a-epimere is tilting cylindrical body, hypomere is the red coke storage tank of vertical cylindrical body combination.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail:
Embodiment 1
Radiation and the dry coke quenching technological process of conductive heat sink formula and device as depicted in figs. 1 and 2, put out stove I by dotted line dry, low-temperature cokes discharges system II, water circulation system III and steam generating system IV forms.
To be loaded to the red coke storage tank 1 dry coke quenching technique by the red coke inlet of about 1000 DEG C that open top cover 15 from coke oven red coke 2 out, after red coke loads, red coke tank top 15 is closed.Enter the coke slowly movement in the red coke conveying device 3 of rotary disc-type in red coke storage tank, and radiant heat transfer is carried out to radiant heat transfer pipe, radiant heat transfer grid 4 is set between red coke and radiant heat transfer pipe.Coke enters heat transfer by heat conduction section after two-stage is carried and dropped temperature to 600-700 DEG C, slowly moves and directly contact transferring heat with metallic walls 7 by gravity.Soft water 18 sends into heat transfer heat pipe 8 from bottom to top by high-pressure hydraulic pump 17, by conduction heat transfer, the heat in coke is passed to soft water, soft water temperature after heat absorption raises or changes steam into, and enter radiant heat transfer pipe 5 by tube connector 6, radiant heat transfer pipe 5 outer wall scribbles the coating receiving heat, carry out radiant heat transfer for water or steam and coke, the thermal radiation absorption rate of dope layer is 0.97.Steam after heat absorption is sent into by steam pipe 11 and is entered steam utilization unit 12 for generating or other utilization, and the water after cooling aggegation enters soft water storage tank 14 by condensed steam return duct 13, recycles.Coke, at warp and metallic walls 7 transmission of heat by contact, after reducing the temperature to 300-200 DEG C, is sent into low-temperature coke storage tank 10 by low-temperature coke conveyer belt 9, is continued to cool to after below 100 DEG C, discharged by cold coke conveyer belt 20 by spraying cooling water 19.The metallic walls inwall directly contacted with coke adopts cast iron materials that heat-conductive characteristic is high and wear-resisting and is even surface, the back side in the face contacted with coke of even surface contacts with the heat pipe passing into water or steam, for the contact of both guarantees, add the resistant to elevated temperatures binding agent being mixed with copper powder in gap between the two, its thermal conductivity factor is 75% of stainless steel 304 steel.Whole dry coke quenching process is incubated by lagging casing 16.The water vapour producing about about 1.2MPa after carrying out radiant heat transfer with the red coke in top is delivered to recovery of chemical products workshop and is done thermal source and use.
Embodiment 2
The present embodiment adopts storage tank to be vertical cylindrical radiation and conductive heat sink formula dry coke quenching technique, dry coke quenching technological process and device are as shown in Figure 2, the red coke storage tank dry coke quenching technique is sent into from coke oven red coke out, the red coke of about 1000 DEG C slowly moves to the conduction heat transfer stage in the radiant heat transfer stage under the conveying of belt transporting apparatus 3a, and red coke slowly moved down under gravity from top to bottom in the conduction heat transfer stage.High-pressure cooling water squeezes into heat transfer heat pipe from bottom to top by high-pressure hydraulic pump, enter saturated steam tank after conducting heat exchange with coke and enter radiant heat transfer pipe again, produce 450 DEG C after carrying out radiant heat transfer with the red coke in top, the superheated steam of 4.6MPa enters generator unit.In the radiation heat transfer stage, coke is down to about 600 DEG C from 1000 DEG C, and in the conduction heat transfer stage, coke is down to about 250 DEG C from about 600 DEG C, coke after cooling sends into low-temperature coke storage tank by low temperature coke conveyer belt, discharges after continuing to be cooled to 80 DEG C by spraying cooling water.
Embodiment 3
The present embodiment adopts storage tank as shown in Figure 4 to be radiation and the conductive heat sink formula dry coke quenching technique of oblique cylindrical shell and vertical cylindrical shell body combined type 1a, the red coke storage tank dry coke quenching technique is sent into from coke oven red coke out, the angle 50 ° of the oblique cylindrical shell body of red coke storage tank epimere and horizontal plane, is conducive to coke slowly movement under gravity.1100 DEG C of red coke are after heat exchange, and in the radiation heat transfer stage, coke is down to 600 DEG C from 1100 DEG C, and in the conduction heat transfer stage, coke no longer sprays watering after being down to 150-120 DEG C from 600 DEG C but directly discharges.
Embodiment 4
The present embodiment is substantially the same manner as Example 1, difference be red coke the radiant heat transfer stage in figure 3 shown in inclined chute formula red coke conveyer 3b conveying under slowly move to the conduction heat transfer stage.
Embodiment 5
The present embodiment is substantially the same manner as Example 2, and difference has set up grid before the rotating jet flow pipe of the top side of inclination inner barrel, and coke is passed through between side and grid below, slowly descending.
Claims (2)
1. the CDQ of coke reclaims a device for thermal energy methods, it is characterized in that at least being made up of dry stove, steam generating system, water circulation system and low-temperature coke system of discharging of putting out; Dry put out in stove be provided with receive hyperthermia radiation radiation of heat heat-transfer pipe and with coke direct contact heat conduction heat transfer pipe, radiant heat transfer pipe and heat transfer by heat conduction pipe inside all pass into water or steam, and the fluid intake side in radiant heat transfer pipe is connected with the fluid issuing side of heat transfer by heat conduction pipe; Described dry furnace roof portion of putting out is provided with red coke inlet, and red coke inlet place is provided with can the top cover of switch, and the dry stove internal upper part that puts out is provided with radiant heat transfer pipe, dryly puts out that bottom in stove is provided with heat transfer by heat conduction pipe, the dry furnace bottom that puts out arranges low-temperature coke outlet; The coke of radiant heat transfer section is from up to down moved by inclination chute or vertical chute or transfers coke by the disk rotated, rotating circular disk is that plural section is arranged in series or transfers coke by mechanically operated belt travel mechanism, belt transfers plural section for being arranged in series, and coke relies on gravity to move from top to bottom in heat transfer by heat conduction section; The radiant heat transfer pipe of radiant heat transfer section is at the top spatial placement of coke, and described radiant heat transfer pipe does not directly contact with coke, and inclination chute or vertical chute receive between hyperthermia radiation radiation of heat heat-transfer pipe and coke and be provided with the grid of isolating coke; Described inside passes between the heat transfer by heat conduction pipe of water or steam and coke and is provided with metallic walls, and metallic walls directly contacts with coke; The material being more than or equal to the thermal conductivity factor 70% of iron between metallic walls with heat transfer by heat conduction pipe by thermal conductivity factor is connected.
2. improve the method for the system effect of device described in claim 1, it is characterized in that from the dry coke putting out fire grate and go out, by bottom coke layer or top spray water lower the temperature further.
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| CN201110425365.5A CN102537914B (en) | 2011-12-16 | 2011-12-16 | Method and device for carrying out dry quenching and recovering heat energy in radiation and conduction heat absorption mode |
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| CN201110425365.5A CN102537914B (en) | 2011-12-16 | 2011-12-16 | Method and device for carrying out dry quenching and recovering heat energy in radiation and conduction heat absorption mode |
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| CN102537914A CN102537914A (en) | 2012-07-04 |
| CN102537914B true CN102537914B (en) | 2015-07-01 |
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| CN103087734B (en) * | 2013-01-29 | 2014-04-16 | 中国中煤能源集团有限公司 | Powder semicoke cooling system and heat acquiring cooler thereof |
| CN103666495B (en) * | 2013-08-27 | 2015-07-01 | 北京神雾环境能源科技集团股份有限公司 | Cooling coking system |
| CN107794062A (en) * | 2016-11-04 | 2018-03-13 | 榆林学院 | A kind of kestner long-tube evaporator for reclaiming semi-coke quenching waste heat |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101334156A (en) * | 2008-07-22 | 2008-12-31 | 马龙根 | Red coke waste heat boiler |
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| CN1081312C (en) * | 1998-10-29 | 2002-03-20 | 宝山钢铁股份有限公司 | Method for recovering waste heat from scoria |
| CN2807029Y (en) * | 2005-07-27 | 2006-08-16 | 杨正高 | High temperature slag cooler |
| CN101749688B (en) * | 2008-12-08 | 2013-05-08 | 北京中冶设备研究设计总院有限公司 | Steam recycle device for utilization and treatment of heat energy of blast furnace slag |
| CN201787548U (en) * | 2010-03-18 | 2011-04-06 | 昆明阳光基业股份有限公司 | Device for acquiring steam from high-temperature materials |
| CN201779635U (en) * | 2010-08-13 | 2011-03-30 | 邹岳明 | High-temperature slag heat utilization system for generating high-pressure hot steam |
| CN202018025U (en) * | 2011-01-12 | 2011-10-26 | 熊天渝 | High temperature sintering mineral aggregate cooling and waste heat steam generator integration device |
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| CN101334156A (en) * | 2008-07-22 | 2008-12-31 | 马龙根 | Red coke waste heat boiler |
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Effective date of registration: 20210319 Address after: 226600 industrial concentration area, Libu Town, Hai'an City, Nantong City, Jiangsu Province (Hongqi Village) Patentee after: JIANGSU MINGGE FORGING EQUIPMENT Co.,Ltd. Address before: 300072 Tianjin City, Nankai District Wei Jin Road No. 92, Tianjin University Patentee before: Tianjin University |
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