CN101963461A - Pyrite cinder heat recovery method - Google Patents
Pyrite cinder heat recovery method Download PDFInfo
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- CN101963461A CN101963461A CN2010105193002A CN201010519300A CN101963461A CN 101963461 A CN101963461 A CN 101963461A CN 2010105193002 A CN2010105193002 A CN 2010105193002A CN 201010519300 A CN201010519300 A CN 201010519300A CN 101963461 A CN101963461 A CN 101963461A
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- slag
- desalted water
- cinder
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to a pyrite cinder heat recovery method. A shell and tube heat exchanger is used as a cinder cooler and provided with a cinder inlet, a cinder outlet, a tube array, a desalted water inlet, a desalted water outlet and a cinder cooler shell, wherein a screw transporting piece is arranged in a tube of the tube array. The pyrite cinder heat recovery method comprises the following steps of: feeding pyrite cinders into the cinder inlet, advancing the pyrite cinders in the tube by using the screw transporting piece to transfer heat to an inner tube wall, then, discharging the pyrite cinders from the cinder outlet, and transporting the pyrite cinders to a cinder field by using a belt conveyer; and adding desalted water into the tube, wherein the desalted water is heated by means of the heat obtained from the outer tube wall; and finally discharging the desalted water from the desalted water outlet as boiler feed water so as to achieve the purposes of cooling the cinders and recovering heat. The pyrite cinder heat recovery method has the following advantages of simple and convenient operation, low energy consumption, low water consumption, simple process, compact installation, no injury for the belt conveyer, low device failure rate, convenient and quick maintenance, few ash leaking points and low environmental pollution, is capable of realizing variable-frequency running and recovering heat and cooling the temperature of the cinders to normal temperature and prolonging the service life.
Description
[technical field]
The present invention relates to the processing of combustion residue, furthermore relate to the processing of pyrite cinder, relate in particular to the recovery of pyrite cinder heat.
[background technology]
In the pyrite-based sulfuric acid production production process, furnace bottom pressure must be maintained in the normal scope, this just need stably discharge about 850 ℃ remaining after the roaster internal combustion thick slags, and the thin ash that enters interior 400 ℃ of waste heat boiler and electric cleaner is also discharged simultaneously.
The cooling method that generally adopts in the pyrite-based sulfuric acid production does not consider to reclaim heat at present, but direct WATER-WASHING METHOD, this method is about about 850 ℃ furnace bottom slag of will discharge in the roaster, discharge the lime-ash that discharge with waste heat boiler, electric cleaner the back, the scraper plate machine that buries cooling by the band water leg is delivered to the slag chill roles, and water further cools off, drains into the slag muck field behind the humidification then.The shortcoming of this method generally all adopts buries the conveying of scraper plate machine, but because slag Wen Taigao, the material of scraper plate machine is difficult to solve, and the scraper plate of scraper plate machine is very easily scraped distortion, even disconnected the backwardness blocked other scraper plate, scraper plate is disconnected that conveying capacity is reduced, do not satisfy the needs of producing, finally cause system shutdown, and the maintenance cost of this system is very high, maintenance environment abominable (high temperature, dust) checks that breakpoint, service work are very loaded down with trivial details.Therefore the safe and stable operation of slag induction system must be lowered the temperature, the final long stable operation that must realize the slag induction system, and guarantee the safe operation of sulfuric acid production plant cycle.And also relatively large for the water yield that this consumed, the wasting of resources of water money is obvious, and economic benefit is relatively poor.
In the Chinese patent database, relate to only have CN2280213 number " the slag waste heat recovery heat pipe steam generator " of pyrite cinder utilization, though this equipment can reclaim the heat of slag, complex structure, troublesome poeration.
[summary of the invention]
The method that the purpose of this invention is to provide a kind of pyrite cinder recuperation of heat solves the various disadvantages that have direct WATER-WASHING METHOD now, reduces maintenance of equipment work amount, reduces water consumption.
The method that the inventor provides is: adopt a shell-and-tube heat exchanger as burning the slag cooler, be called for short the slag cooler, it has slag inlet, slag notch, tubulation, desalted water import, desalted water outlet and burns the slag housing of cooler, and the helical feed sheet is installed in the pipe of tubulation; Pyrite cinder is sent into slag inlet, in pipe, rely on flight to march forward, heat is passed to inner tubal wall, go out from slag notch then, deliver to the slag field with belt conveyer; Desalted water enters between pipe, obtains heat and heats up from outer tube wall, export away as boiler feedwater from desalted water at last, reaches the purpose that slag, recovery heat are burnt in cooling.
In the above-mentioned heat transfer process, burn the slag temperature and reduce to 80 ℃～100 ℃ by 700 ℃～850 ℃, the desalted water temperature rise rises to 70 ℃～90 ℃ by 40 ℃～60 ℃.
The mass ratio of above-mentioned slag and desalted water is (4～5): 1, and the water that described desalted water is promptly removed its esters by ion-exchange or reverse osmosis membrane, its quality index is hardness≤3 μ mol/L, electrical conductivity≤10 μ s/cm.
The rotating speed of above-mentioned helical feed sheet is 0.8～8r/min, regulates according to the quantity of slag.
Dispose control valve and teletransmission thermometer on the inlet pipeline that above-mentioned desalted water import connects.
The using method of above-mentioned slag cooler is: earlier desalted water is opened into and out of water valve, allowed slag cooler shell side be full of desalted water; Then the valve of slag inlet is opened,, or adjusted the quantity of slag with frequency converter according to the suitable aperture of furnace bottom pressure size adjustment of roaster; According to going out quantity of slag control and regulation valve opening, regulate the desalted water outlet temperature with water yield.
The present invention has changed carrying method under the directly big water gaging spray of traditional cooling or the condition of high temperature, has following advantage: 1. easy and simple to handle, can realize converting operation, and the low and recyclable heat of energy consumption, water consumption is few; 2. flow process is simple, installs compact; 3. the slag temperature drop is to normal temperature; Belt conveyer is not had injury, increase the service life; 4. equipment failure rate is low, overhauls convenient, fast; 5. it is few to leak the ash point, and environmental pollution is few.
[description of drawings]
Accompanying drawing is a pyrite cinder recuperation of heat principle schematic of the present invention.Among the figure: 1 is slag inlet, and 2 is slag notch, and 3 is the helical feed sheet, and 4 is the desalted water import, and 5 are the desalted water outlet, and 6 is slag cooler shell, and 7 is tubulation, and 8 is belt conveyer.
[specific embodiment]
With urn good fortune phosphate fertilizer plant of Wengfu Group Co., Ltd. sulfuric acid apparatus is example, concrete performance is as follows: with a shell-and-tube heat exchanger as burning slag cooler, near being installed under the troilite Boiling Combustion stove, it has slag inlet 1, slag notch 2, tubulation 7, desalted water import 4, desalted water outlet 5 and slag cooler shell 6, tubulation 7 quantity are 19, caliber is DN200, and helical feed sheet 3 is installed in the pipe; Slag inlet 1 connects the burning slag delivery pipe of Boiling Combustion stove; Belt conveyer 8 is arranged below the slag notch 2.Earlier desalted water is opened into and out of water valve, allowed slag cooler shell 6 interior pipes be full of desalted water outward; Then the valve of slag inlet 1 is opened, according to the suitable aperture of furnace bottom pressure size adjustment of roaster; Pyrite cinder enters slag inlet 1, relies on helical feed sheet 3 to push ahead in pipe, and heat is passed to inner tubal wall, goes out from slag notch 2 then, delivers to the slag field with belt conveyer 8; Desalted water enters between pipe from desalted water import 4, obtains heat and heats up from outer tube wall, goes out as boiler feedwater from desalted water outlet 5 at last.Dispose control valve and teletransmission thermometer on the inlet pipeline of desalted water.During operation,, regulate the desalted water outlet temperature with water yield according to going out quantity of slag control and regulation valve opening.Burn the slag temperature and reduce to 80 ℃～100 ℃ by 700 ℃～850 ℃, the desalted water temperature rise rises to 70 ℃～90 ℃ by 40 ℃～60 ℃.The mass ratio of slag and desalted water is 5: 1.
Like this, humidification again after the slag temperature drop got off can be saved the used water yield of humidification, and controlled humidity easily; The low temperature slag mixes more even with normal-temperature water, be difficult for dust, and water consumption is few, to the corresponding minimizing of the corrosion of equipment.
Claims (6)
1. the method for a pyrite cinder recuperation of heat, it is characterized in that adopting a shell-and-tube heat exchanger as burning the slag cooler, be called for short the slag cooler, it has slag inlet, slag notch, tubulation, desalted water import, desalted water outlet and burns the slag housing of cooler, and the helical feed sheet is installed in the pipe of tubulation; Pyrite cinder is sent into slag inlet, in pipe, rely on flight to march forward, heat is passed to inner tubal wall, go out from slag notch then, deliver to the slag field with belt conveyer; Desalted water enters between pipe, obtains heat and heats up from outer tube wall, export away as boiler feedwater from desalted water at last, reaches the purpose that slag, recovery heat are burnt in cooling.
2. the method for claim 1 is characterized in that in the described heat transfer process, burns the slag temperature and reduces to 80 ℃～100 ℃ by 700 ℃～850 ℃, and the desalination water temperature rises to 70 ℃～90 ℃ by 40 ℃～60 ℃.
3. the method for claim 1, the mass ratio that it is characterized in that described burning slag and desalted water is (4～5): 1, the water that described desalted water is promptly removed its esters by ion-exchange or reverse osmosis membrane, its quality index are hardness≤3 μ mol/L, electrical conductivity≤10 μ s/cm.
4. the method for claim 1, the rotating speed that it is characterized in that described helical feed sheet is 0.8～8r/min.
5. the method for claim 1 is characterized in that disposing control valve and teletransmission thermometer on the inlet pipeline that described desalted water import connects.
6. as the described method in one of claim 1 or 5, it is characterized in that described slag cooler using method is: earlier desalted water is opened into and out of water valve, allowed slag cooler shell side be full of desalted water; Then the valve of slag inlet is opened,, or adjusted the quantity of slag with frequency converter according to the suitable aperture of furnace bottom pressure size adjustment of roaster; According to going out quantity of slag control and regulation valve opening, regulate the desalted water outlet temperature with water yield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105193002A CN101963461A (en) | 2010-10-26 | 2010-10-26 | Pyrite cinder heat recovery method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105193002A CN101963461A (en) | 2010-10-26 | 2010-10-26 | Pyrite cinder heat recovery method |
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| CN101963461A true CN101963461A (en) | 2011-02-02 |
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| CN2010105193002A Pending CN101963461A (en) | 2010-10-26 | 2010-10-26 | Pyrite cinder heat recovery method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382976A (en) * | 2011-11-09 | 2012-03-21 | 建业庆松集团有限公司 | Fluidized boiling roasting furnace |
| CN102620574A (en) * | 2012-05-02 | 2012-08-01 | 陈亮 | Residue discharge and heat recovery method of pyrite acid production and equipment system |
| CN103278020A (en) * | 2013-06-28 | 2013-09-04 | 瓮福（集团）有限责任公司 | Blaster furnace slag waste heat recovery method for iron pyrite acid making device |
| CN103789535A (en) * | 2014-01-26 | 2014-05-14 | 招远市招金金合科技有限公司 | Recovery system and method of magnetized cinder of high-Fe sulfuric acid |
| CN104215072A (en) * | 2014-08-22 | 2014-12-17 | 合肥四方磷复肥有限责任公司 | Residual heat recovery process for slag cooler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108811A (en) * | 1984-12-03 | 1986-05-10 | 加拿大专利和开发有限公司 | Mineral smelting reduction technology and equipment |
| CN2280213Y (en) * | 1996-12-20 | 1998-04-29 | 南京化工大学 | Heat pipe steam generator with heat recovery from slag |
| CN2667328Y (en) * | 2003-12-02 | 2004-12-29 | 王志凯 | Clinker cooling device |
| CN201191145Y (en) * | 2008-03-14 | 2009-02-04 | 西安思安新能源有限公司 | Waste heat utilization apparatus for pyrite slag |
-
2010
- 2010-10-26 CN CN2010105193002A patent/CN101963461A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85108811A (en) * | 1984-12-03 | 1986-05-10 | 加拿大专利和开发有限公司 | Mineral smelting reduction technology and equipment |
| CN2280213Y (en) * | 1996-12-20 | 1998-04-29 | 南京化工大学 | Heat pipe steam generator with heat recovery from slag |
| CN2667328Y (en) * | 2003-12-02 | 2004-12-29 | 王志凯 | Clinker cooling device |
| CN201191145Y (en) * | 2008-03-14 | 2009-02-04 | 西安思安新能源有限公司 | Waste heat utilization apparatus for pyrite slag |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102382976A (en) * | 2011-11-09 | 2012-03-21 | 建业庆松集团有限公司 | Fluidized boiling roasting furnace |
| CN102382976B (en) * | 2011-11-09 | 2013-04-17 | 建业庆松集团有限公司 | Fluidized boiling roasting furnace |
| CN102620574A (en) * | 2012-05-02 | 2012-08-01 | 陈亮 | Residue discharge and heat recovery method of pyrite acid production and equipment system |
| CN103278020A (en) * | 2013-06-28 | 2013-09-04 | 瓮福（集团）有限责任公司 | Blaster furnace slag waste heat recovery method for iron pyrite acid making device |
| CN103789535A (en) * | 2014-01-26 | 2014-05-14 | 招远市招金金合科技有限公司 | Recovery system and method of magnetized cinder of high-Fe sulfuric acid |
| CN103789535B (en) * | 2014-01-26 | 2015-04-22 | 招远市招金金合科技有限公司 | Recovery system and method of magnetized cinder of high-Fe sulfuric acid |
| CN104215072A (en) * | 2014-08-22 | 2014-12-17 | 合肥四方磷复肥有限责任公司 | Residual heat recovery process for slag cooler |
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Application publication date: 20110202 |