CN202692628U - System for drying ammonium sulphate airflow by residual heat recovery - Google Patents
System for drying ammonium sulphate airflow by residual heat recovery Download PDFInfo
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- CN202692628U CN202692628U CN2012203071344U CN201220307134U CN202692628U CN 202692628 U CN202692628 U CN 202692628U CN 2012203071344 U CN2012203071344 U CN 2012203071344U CN 201220307134 U CN201220307134 U CN 201220307134U CN 202692628 U CN202692628 U CN 202692628U
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- ammonium sulfate
- heat recovery
- conveyer dryer
- straight tube
- airflow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The utility model discloses a system for drying ammonium sulphate airflow by residual heat recovery, which comprises an airflow drier which uses residual heat of flue gas as a drying heat source, wherein a feeding device is horizontally arranged on the lower portion of the airflow drier; the lower end of the airflow drier is connected with an air blower by an air conduct; the airflow drier is connected with a cyclone separator by a reverse U-shaped return pipe; a discharging rotary valve is connected at the lower end of the cyclone separator; the top end of the cyclone separator is connected with a cloth bag separator through an air conduct; and a draught fan is arranged at one side of the cloth bag separator. The system for drying ammonium sulphate airflow by residual heat recovery has the advantages that: the structure of the production device is simplified, and the manufacturing cost is greatly reduced; the system avoids traditional dust removing ways including steam power consumption, rinsing and the like, improves the operation environment and avoids waste of the water resource; the fluidized beds and the condensing equipment are avoided, electric consumption during producing is further reduced, and the efficiency is greatly improved; and both the practicability and the reliability are further enhanced.
Description
Technical field
The utility model relates to metallurgical coking technical field, relates in particular to a kind of system that carries out the ammonium sulfate pneumatic conveying drying with waste heat recovery.
Background technology
Sulfuric acid is inhaled ammonia process and is reclaimed a kind of method that ammonia is coke-stove gas recovery ammonia, and it is take sulfuric acid as absorption liquid, and the ammonia in the gas recovery is made ammonium sulfate simultaneously.At present general method is made ammonium sulfate for reclaim the ammonia in the coke-stove gas with the saturator method.Coal gas in gas preheater pre-thermal conductance 55-65 ℃ enter saturator, the ammonia in saturator in the coal gas is generated ammonium sulfate crystallization by in the sulfate liquor and absorb, coal gas is through discharging except behind the acid mist of deentrainment, coal gas ammon amount at this moment is less than 0.1g/cm
3The crystallization that sinks to the saturator bottom is pumped into crystallization tank by crystallization together in company with mother liquor, certainly flows into centrifuge by the crystallization tank bottom again, separates ammonium sulfate crystallization through centrifuge and sends into pneumatic conveyer dryer with conveying worm, with becoming the ammonium sulfate finished product behind the heated air drying.Send into the ammonium sulfate hopper.Send into warehouse for finished product through weighing, packing.
And existing thiamines drying is the fluid bed drying process that adopts take steam as power, comprises that individual layer drum type brake fluidized bed dryer, whirlwind and the dedusting of wet method two-stage, air blast and air-introduced machine one push away a pull-type dynamical system.There is following shortcoming in this system:
1) adopt the mode of steam and air indirect heat exchange so that dry-heat air to add the heat loss quantity of steam large;
2) use fluidized bed dryer, cause the gas distribution grid resistance of fluid bed large, energy consumption is high, and whirlwind and the dedusting of wet method two-stage, air blast, air-introduced machine one push away a pull-type dynamical system, and system's conveying energy consumption is larger, and power consumption is high;
3) use wet dedusting, product yield is low, and production efficiency is low, and the water resources consumption amount is large.
The utility model content
A kind of purpose of the present utility model provides a kind of system that carries out the ammonium sulfate pneumatic conveying drying with waste heat recovery, the above deficiency that exists to overcome prior art.
The purpose of this utility model is achieved through the following technical solutions:
A kind of system that carries out the ammonium sulfate pneumatic conveying drying with waste heat recovery comprises pneumatic conveyer dryer, and described pneumatic conveyer dryer bottom is provided with horizontally disposed feeder, and the pneumatic conveyer dryer lower end is connected with air blast by the air channel, and the pneumatic conveyer dryer top is provided with the inverted U return pipe; Described pneumatic conveyer dryer comprises the straight tube of the some sections structures that are welded as a whole, and the epimere straight tube is identical with the diameter of hypomere straight tube, and the diameter of described epimere straight tube and hypomere straight tube is greater than the diameter of interlude straight tube.
Further, pneumatic conveyer dryer is connected with cyclone separator by the inverted U return pipe, and the cyclone separator lower end is provided with the discharging rotary valve, and described cyclone separator top is connected with cloth bag separator by the air channel, and cloth bag separator one side is provided with air-introduced machine.Selectable, pneumatic conveyer dryer is connected with composite multi sack cleaner or two-stage multitube series connection deduster by the inverted U return pipe.
Another kind of purpose of the present utility model is to provide a kind of method of carrying out the ammonium sulfate pneumatic conveying drying with waste heat recovery, and it may further comprise the steps:
1) will be from the flue gas (approximately 300～400 ℃) of tubular heater or flue gases of cock oven (260 ~ 300 ℃) by lowering the temperature after the heat exchange utilization, or with its use gas mixed heat exchanger and the cooling of a certain amount of air mixed heat transfer, be for subsequent use after 140～150 ℃ to the mist temperature;
2) in pneumatic conveyer dryer, add wet ammonium sulfate by feeder, and the mist after will lowering the temperature is sent in the pneumatic conveyer dryer by air blast, so that mist and wet ammonium sulfate fully heat exchange in pneumatic conveyer dryer, hot gas is with heat transferred ammonium sulfate, make in the air-flow that the moisture gasification enters in the wet ammonium sulfate, finish the dry run of wet ammonium sulfate;
3) separated from the gas by cyclone separator through the dried ammonium sulfate of pneumatic conveyer dryer, and by the discharge of discharging rotary valve, gas and remaining ammonium sulfate enter breather line; And
4) gas enters cloth bag separator with remaining ammonium sulfate by breather line and further separates, and the ammonium sulfate after the separation is discharged by the cloth bag separator bottom opening, and residual gas is then extracted out with further utilization under the effect of air-introduced machine.
Selectable, described cyclone separator and cloth bag separator can be replaced by composite multi sack cleaner or two-stage multitube series connection deduster.
The beneficial effects of the utility model are: utilize the flue gas waste heat as drying source, solve steam as the energy, the problem that the steam energy consumption is large; Utilize pneumatic conveyer dryer to substitute existing fluid bed, the resolution system resistance is large, and the fluid bed power consumption is high, the large problem of power consumption; Solve former explained hereafter efficient with the bag-type dust mode low, water washing dedust mode (changed water one time in two days, water returns joins mother liquor) product yield is low, water in dust removal consumption of water resource problem; Simplified the structure of process units, the manufacturing cost decrease has been abandoned the dedusting methods such as traditional steam, washing, has improved the environment of operation, and has avoided the waste of water resource; Cancelled fluid bed and condensing plant, further reduced the power consumption when producing, and efficient significantly promotes, practicality and reliability all further strengthen.
Description of drawings
The below is described in further detail the utility model with reference to the accompanying drawings.
Fig. 1 is a kind of structural representation that carries out the system of ammonium sulfate pneumatic conveying drying with waste heat recovery of embodiment of the present utility model;
Fig. 2 is the structural representation of the composite multi sack cleaner of embodiment of the present utility model a kind of system of carrying out the ammonium sulfate pneumatic conveying drying with waste heat recovery;
Fig. 3 is the structural representation of the two-stage multitube series connection deduster of embodiment of the present utility model a kind of system of carrying out the ammonium sulfate pneumatic conveying drying with waste heat recovery.
Among the figure:
1, air blast; 2, feeder; 3, pneumatic conveyer dryer; 4, cyclone separator; 5, discharging rotary valve; 6, cloth bag separator; 7, air-introduced machine.
The specific embodiment
As Figure 1-3, the described a kind of system that carries out the ammonium sulfate pneumatic conveying drying with waste heat recovery of the utility model embodiment, comprise pneumatic conveyer dryer 3, described pneumatic conveyer dryer 3 bottoms are provided with horizontally disposed feeder 2, pneumatic conveyer dryer 3 lower ends are connected with air blast 1 by the air channel, pneumatic conveyer dryer 3 tops are provided with the inverted U return pipe, and pneumatic conveyer dryer 3 is connected with cyclone separator 4 by the inverted U return pipe, and cyclone separator 4 lower ends are provided with discharging rotary valve 5; Described cyclone separator 4 tops are connected with cloth bag separator 6 by the air channel, and cloth bag separator 6 one sides are provided with air-introduced machine 7; Perhaps pneumatic conveyer dryer 3 is connected with composite multi sack cleaner or two-stage multitube series connection deduster by the inverted U return pipe.
Described pneumatic conveyer dryer 3 comprises the straight tube of the some sections structures that are welded as a whole, and the epimere straight tube is identical with the diameter of hypomere straight tube, and the diameter of described epimere straight tube and hypomere straight tube is greater than the diameter of interlude straight tube.Adopt the structure that repeatedly straightens the footpath, can give full play to accelerating sections and have high heat and mass effect, with intensified drying process.The material particle that adds enters in the little drier straight tube of caliber, particle is accelerated, when its accelerated motion at the end, dry caliber sudden enlargement, particle enters the large drier straight tube of caliber according to inertia, particle is in motion process, constantly slow down owing to being subject to resistance, the drier straight tube dwindles suddenly again until slow down at the end, this like-particles is accelerated again, so repeats caliber to be dwindled and enlarge, and then the movement velocity of particle is also alternately accelerated and slowed down, make flue gas and interparticle relative velocity and heat transfer area all larger, thereby strengthened the speed of heat and mass.Simultaneously, air velocity descends and also correspondingly to have increased drying time in Large Diameter Pipeline.
The inverted U return pipe can play the change airflow direction equally, increasing agitation strength increases the effect of drying time, obtain at last dry material and air-flow and together enter ensuing handling process from material outlet pipe outflow drier, to finish remaining dry separation process.
The caliber that the pneumatic conveyer dryer epimere is larger and inverted U return pipe top are used for removing the hand hole that gathers materials and are conducive to reduce dry gas stream to the surge at equipment top, improve Systems balanth and equipment life.
The described a kind of method of carrying out the ammonium sulfate pneumatic conveying drying with waste heat recovery of the utility model embodiment, it may further comprise the steps:
1) will be from the flue gas (approximately 300～400 ℃) of tubular heater or flue gases of cock oven (260 ~ 300 ℃) by lowering the temperature after the heat exchange utilization, or with its use gas mixed heat exchanger and the cooling of a certain amount of air mixed heat transfer, be for subsequent use after 140～150 ℃ to the mist temperature;
2) add wet ammonium sulfate in the pneumatic conveyer dryer 3 by feeder 2, and the mist after will lower the temperature sends in the pneumatic conveyer dryer 3 by air blast 1, so that mist and wet ammonium sulfate fully react in pneumatic conveyer dryer 3;
3) separated from the gas by cyclone separator 4 through pneumatic conveyer dryer 3 dried ammonium sulfate, and by 5 discharges of discharging rotary valve, gas and remaining ammonium sulfate enter breather line; And
4) gas enters cloth bag separator 6 with remaining ammonium sulfate by breather line and further separates, and the ammonium sulfate after the separation is discharged by cloth bag separator 6 bottom openings, and residual gas is then extracted out with further utilization under the effect of air-introduced machine 7.
The utility model and prior art steam indirect, fluidized bed drying, ammonium sulfate are compared with the technique of gas wet separation and are had the following advantages: without steam, reduce power cost, 0.15 ton of one ton of ammonium sulfate steam saving of the every processing of new technology; Effectively utilize flue gas waste heat, complementary energy, reduce process energy consumption, energy-conservation more than 85%; Improve operating environment, eliminated the loss in steam conveying, the use procedure, steam-condensation waste water produces and discharging; Simplify ammonium sulfate drying system equipment, cancelled fluid bed; After adopting pneumatic conveyer dryer, the resistance of system can reduce, and the power of blower fan reduces, and electric power consumption reduces by 40%; Product yield improves 15%.
Application example one
Temperature is that temperature was reduced to 140～150 ℃ after 300～400 ℃ tube furnace flue gas was utilized by heat exchange.Temperature is that 140～150 ℃ flue gas enters into pneumatic conveyer dryer 3 by air blast, directly contact with the wet ammonium sulfate that screw feeder 2 is sent here, ammonium sulfate is distributed in the thermal current, with together fully heat exchange in the uphill process of air-flow, hot gas is with heat transferred ammonium sulfate, make in the air-flow that the moisture gasification enters in the ammonium sulfate, finish the dry run of ammonium sulfate.It is separated from the gas in cyclone separator that dried ammonium sulfate enters cyclone separator 4 through U-shaped tube connector, obtain purity from whirlwind blow-off valve 5 and be about 80 ~ 85% product, remaining product is through second level cloth bag separator 6, and is out separated from the gas, reclaims from the cloth bag blow-off valve.Purified gas (about 70 ℃ of temperature) is emptying or be sent to the elsewhere and use through air-introduced machine 7.
Application example two
Temperature is that 260～300 ℃ flue gases of cock oven passes through gas mixed heat exchanger and the direct mixed heat transfer of air, and air mass flow is regulated by control valve according to the mist temperature, makes the mist temperature be reduced to 140～150 ℃.Then enter into pneumatic conveyer dryer 3 by air blast 1, directly contact with the wet ammonium sulfate that screw feeder 2 is sent here, ammonium sulfate is distributed in the thermal current, with together fully heat exchange in the uphill process of air-flow, hot gas is with heat transferred ammonium sulfate, make in the air-flow that the moisture gasification enters in the ammonium sulfate, finish the dry run of ammonium sulfate.Dried ammonium sulfate enter Fig. 2 through U-shaped tube connector and composite multi sack cleaner or two-stage multitube series connection deduster shown in Figure 3 separated from the gas, obtain purity greater than 99.9% product, purified gas (about 70 ℃ of temperature) is emptying or be sent to the elsewhere and use behind air-introduced machine.
Although below only described specific embodiment example of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection domain of the present utility model is limited by appended claims.Those skilled in the art can make various changes or modifications to these embodiments under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes or modification all fall into protection domain of the present utility model.
Claims (4)
1. system that carries out the ammonium sulfate pneumatic conveying drying with waste heat recovery, it is characterized in that: this system comprises and utilizes the flue gas waste heat as the pneumatic conveyer dryer (3) of drying source, described pneumatic conveyer dryer (3) bottom is provided with horizontally disposed feeder (2), pneumatic conveyer dryer (3) lower end is connected with air blast (1) by the air channel, and pneumatic conveyer dryer (3) top is provided with the inverted U return pipe; Described pneumatic conveyer dryer (3) comprises the straight tube of the some sections structures that are welded as a whole, and the epimere straight tube is identical with the diameter of hypomere straight tube, and the diameter of described epimere straight tube and hypomere straight tube is greater than the diameter of interlude straight tube.
2. the system that carries out the ammonium sulfate pneumatic conveying drying with waste heat recovery according to claim 1, it is characterized in that: pneumatic conveyer dryer (3) is connected with cyclone separator (4) by the inverted U return pipe, and cyclone separator (4) lower end is provided with discharging rotary valve (5); Described cyclone separator (4) top is connected with cloth bag separator (6) by the air channel, and cloth bag separator (6) one sides are provided with air-introduced machine (7).
3. the system that carries out the ammonium sulfate pneumatic conveying drying with waste heat recovery according to claim 1 is characterized in that: pneumatic conveyer dryer (3) is connected with composite multi sack cleaner or two-stage multitube series connection deduster by the inverted U return pipe.
4. each described system that carries out the ammonium sulfate pneumatic conveying drying with waste heat recovery according to claim 1-3, it is characterized in that: described flue gas is from 300～400 ℃ flue gas of tubular heater, or 260 ~ 300 ℃ flue gases of cock oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203071344U CN202692628U (en) | 2012-06-27 | 2012-06-27 | System for drying ammonium sulphate airflow by residual heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203071344U CN202692628U (en) | 2012-06-27 | 2012-06-27 | System for drying ammonium sulphate airflow by residual heat recovery |
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| Publication Number | Publication Date |
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| CN202692628U true CN202692628U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012203071344U Expired - Fee Related CN202692628U (en) | 2012-06-27 | 2012-06-27 | System for drying ammonium sulphate airflow by residual heat recovery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706118A (en) * | 2012-06-27 | 2012-10-03 | 中润天海（北京）环保科技有限公司 | System and method for drying ammonium sulfate gas flow by using waste heat recovery |
| CN104215076A (en) * | 2014-08-19 | 2014-12-17 | 南京钢铁股份有限公司 | Device and method utilizing smoke residual heat of coking pipe type furnace to dry ammonium sulphate |
-
2012
- 2012-06-27 CN CN2012203071344U patent/CN202692628U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706118A (en) * | 2012-06-27 | 2012-10-03 | 中润天海（北京）环保科技有限公司 | System and method for drying ammonium sulfate gas flow by using waste heat recovery |
| CN104215076A (en) * | 2014-08-19 | 2014-12-17 | 南京钢铁股份有限公司 | Device and method utilizing smoke residual heat of coking pipe type furnace to dry ammonium sulphate |
| CN104215076B (en) * | 2014-08-19 | 2016-04-27 | 南京钢铁股份有限公司 | A kind of device and method utilizing the dry sulphur ammonium of coking tube furnace fume afterheat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181226 Address after: Room 101, Building 6, Lian Garden, Anhui North, Chaoyang District, Beijing Co-patentee after: Jinan Metallurgical & Chemical Equipment Co., Ltd. Patentee after: Qian Haiguang Address before: Room 1602, Building 1, No. 3, Pingli Middle Street, Dongcheng District, Beijing Co-patentee before: Jinan Metallurgical & Chemical Equipment Co., Ltd. Patentee before: China run Tian Hai (Beijing) Environmental Protection Technology Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20200627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |