CN102515456A - Apparatus for dehydrating sludge by using cement kiln-tail low-temperature exhaust gas - Google Patents

Apparatus for dehydrating sludge by using cement kiln-tail low-temperature exhaust gas Download PDF

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Publication number
CN102515456A
CN102515456A CN2011104068141A CN201110406814A CN102515456A CN 102515456 A CN102515456 A CN 102515456A CN 2011104068141 A CN2011104068141 A CN 2011104068141A CN 201110406814 A CN201110406814 A CN 201110406814A CN 102515456 A CN102515456 A CN 102515456A
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CN
China
Prior art keywords
heat exchanger
sludge
dewatered sludge
water
cement kiln
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011104068141A
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Chinese (zh)
Inventor
毛志伟
陈幼荣
张松立
曹宗平
邓飞飞
施德祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
South Cement Co Ltd
Hefei Cement Research and Design Institute Co Ltd
Original Assignee
South Cement Co Ltd
Hefei Cement Research and Design Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by South Cement Co Ltd, Hefei Cement Research and Design Institute Co Ltd filed Critical South Cement Co Ltd
Priority to CN2011104068141A priority Critical patent/CN102515456A/en
Publication of CN102515456A publication Critical patent/CN102515456A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an apparatus used for dehydrating sludge by using cement kiln-tail low-temperature exhaust gas. The apparatus comprises a high-efficiency heat exchanger, a wet sludge feeding machine, a dehydration machine, and a dry sludge chamber. A steam inlet port of the dehydration machine communicates with a gas outlet of the high-efficiency heat exchanger through a gas supplying pipe; a water outlet of the dehydration machine communicates with a water inlet of the high-efficiency heat exchanger through a water supplying pipe; a feeding port of the dehydration machine communicates with a discharging port of the wet sludge feeding machine through a feeding pipe; a discharging pipe is connected outside a discharging port of the dehydration machine, and communicates with the dehydration machine; a smoke discharging pipe is connected outside a smoke discharging port of the high-efficiency heat exchanger, and communicates with the high-efficiency heat exchanger; the smoke discharging pipe leads to a kiln-tail deduster; a smoke discharging port of the kiln-tail deduster communicates with a chimney. According to the invention, saturated steam produced by the high-efficiency heat exchanger is used for dehydrating wet sludge, such that water content in sludge is reduced, and actual heat value of the sludge is increased. Low-temperature waste heat is utilized, and sludge utilization rate is also improved. The investment and operation cost are low. Therefore, waste heat is turned into a resource; discharging amount is reduced; and the waste heat is turned harmless.

Description

A kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge
Technical field:
The present invention relates generally to the cement kiln synergic processing waste and utilizes the field, relates in particular to a kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge.
Background technology:
At present domestic building up perhaps mainly contains two kinds in the Technology of utilizing cement kiln synergic processing mud of building.The one, utilize the Technology of the direct burning sludge of cement kiln, mud is directly delivered in smoke-box or the decomposing furnace burned.The problem that exists is: because sludge moisture content is big, calorific value is low, need to consume a large amount of auxiliary fuels, energy consumption is big, and treatment capacity mud is limited; The 2nd, utilize the direct or indirect dewatered sludge of flue gas after, send again like cement kiln and burn to substitute the partly Technology of fuel, this method is that mud is supported formerization utilization, is the technique direction of disposing.
The problem that exists is; No matter directly or indirectly mummification at present all utilizes the kiln tail not advance the thermal source of the flue gas of boiler of power generation by waste heat as the pre-treatment mummification basically, and this will draw sound to the cogeneration generation.We notice, through 220 ℃ of flue gases after the cogeneration, except that partly being used to dry the raw material, remaining is just by row side.And this part low-temperature flue gas also has a certain amount of energy consumption, and the amount average out to 40% of discharging.
Summary of the invention:
The object of the invention is exactly in order to remedy the defective of prior art, a kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge to be provided.
The present invention realizes through following technical scheme:
A kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge; Include efficient heat exchanger, wet sludge feeder, desiccation machine and dewatered sludge storehouse; It is characterized in that: be communicated with through air-supply duct between the steam introducing port of desiccation machine and the air outlet of efficient heat exchanger, be communicated with through water-supply line between the water outlet of desiccation machine and the water-in of efficient heat exchanger; Be communicated with through feeder sleeve between the opening for feed of desiccation machine and the discharge port of wet sludge feeder, the discharge port of desiccation machine is communicated with discharge tube outward, and discharge tube leads to the dewatered sludge storehouse; The smoke outlet of efficient heat exchanger is communicated with smoke exhaust pipe outward, and smoke exhaust pipe leads to kiln tail fly-ash separator, and the smoke outlet of kiln tail fly-ash separator is communicated with chimney.
A kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge is characterized in that: the dewatered sludge discharge valve is installed on the discharge tube.
A kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge is characterized in that: be provided with water pump in the water-supply line.
A kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge is characterized in that: valve is installed on the air-supply duct.
Efficient heat exchanger and desiccation machine are housed in the described device.Heat pipe is housed in the efficient heat exchanger, and its import links to each other with the kiln tail gas pipe, utilizes the gentle high conduction efficiency performance of superconduction of heat pipe, can be effectively converts 220 ℃ waste gas in the kiln tail gas pipe to 150 ℃ saturation steam.The hub two ends of desiccation machine are respectively steam introducing port and steam export mouth.Link to each other through air-supply duct between the steam introducing port of desiccation machine and the air outlet of efficient heat exchanger, steam is derived joint and is linked to each other with upper end of condenser, and the opening for feed of desiccation machine links to each other with wet sludge feeder, discharge port with export discharge valve and link to each other, send into the dewatered sludge storehouse.
The described device that utilizes cement kiln end low temperature waste gas dewatered sludge is characterized in that: said efficient heat exchanger is the heat pipe residual-heat exchanger, and desiccation machine is the hollow desiccation machine of disc type.
During work, low temperature waste gas (220 ℃) is introduced efficient heat exchanger through high temperature butterfly valve, by water pump water is also squeezed into heat exchanger; Waste gas produces saturation steam with the water heating evaporation, and this saturated vapor is pressed into and flows into desiccation machine engine housing chuck and blades axes inner chamber, utilizes the latent heat of water vapor to come indirectly fuselage and disc to be heated simultaneously; Wet mud is by wet sludge feeder feeding desiccation machine; Rotation through disc in the desiccation machine makes the mud upset, stirs, and brings in constant renewal in the heating interface, fully contacts with the disc face with heated fuselage; By fully heating; Make the contained surface-moisture evaporation of wet mud, be transported to the dewatered sludge storehouse through discharge valve, send into cement kiln as alternative fuel at last and burn by the mud of mummification.Burning the back lime-ash uses as feed proportioning.The exhaust steam that mud is evaporated gets into Sewage treatment systems after condensation.The low pressure saturated vapor recycles back into heat exchanger through the outlet behind the desiccation machine.
Kiln tail gas discharges after entering kiln tail fly-ash separator system purification after through efficient heat exchanger.If need the sludge quantity Shanghai Communications University of mummification, or the low temperature waste gas amount is inadequately, just introduces 330 ℃ of high-temp waste gas of kiln tail partly through high temperature butterfly valve and perhaps introduces the part high-temp waste gas of kiln hood cooling machine and be used as subsequent use and additional.
Advantage of the present invention is:
The present invention produces saturated vapor again with the low temperature waste gas of cement kiln end after through cogeneration, and because of original this part waste gas is used to dry the raw material except that average 60%, all the other have been discharged, and the part heat also runs off thereupon.The wet mud of saturated vapor mummification through efficient heat exchanger produces to reduce the moisture content of mud, increases the actual calorific value of mud.Not only utilize low temperature exhaust heat, also improved the mud utilization ratio.And investment and running cost are low, have realized resource utilization, minimizing and innoxious purpose; Meet market demand and Economic development requirement, meet save energy, low-carbon economy and requirement on environmental protection.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Embodiment:
Referring to accompanying drawing.
A kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge; Include efficient heat exchanger 1, wet sludge feeder 3, desiccation machine 2 and dewatered sludge storehouse 6; Be communicated with through air-supply duct between the steam introducing port of desiccation machine 2 and the air outlet of efficient heat exchanger 1, be communicated with through water-supply line between the water-in of the water outlet of desiccation machine 2 and efficient heat exchanger 1; Be communicated with through feeder sleeve between the discharge port of the opening for feed of desiccation machine 2 and wet sludge feeder 3, the discharge port of desiccation machine 2 is communicated with discharge tube outward, and discharge tube leads to dewatered sludge storehouse 6; The smoke outlet of efficient heat exchanger 1 is communicated with smoke exhaust pipe outward, and smoke exhaust pipe leads to kiln tail fly-ash separator 4, and the smoke outlet of kiln tail fly-ash separator 4 is communicated with chimney 5.
Dewatered sludge discharge valve 10 is installed on the discharge tube.
Be provided with water pump 9 in the water-supply line.
Valve 8 is installed on the air-supply duct.
During work, low temperature waste gas (220 ℃) is introduced efficient heat exchanger 1 through high temperature butterfly valve 7, by water pump 9 water is also squeezed into heat exchanger 2; Waste gas produces saturation steam with the water heating evaporation, and this saturated vapor is pressed into and flows into desiccation machine 2 engine housing chucks and blades axes inner chamber, utilizes the latent heat of water vapor to come indirectly fuselage and disc to be heated simultaneously; Wet mud is by wet sludge feeder 3 feeding desiccation machines 4; Rotation through disc makes the mud upset, stirs, and brings in constant renewal in the heating interface, fully contacts with the disc face with heated fuselage; By fully heating; Make the contained surface-moisture evaporation of mud, be transported to dewatered sludge storehouse 6 through discharge valve 10, send into cement kiln as alternative fuel at last and burn by the mud of mummification.Burning the back lime-ash uses as feed proportioning.The exhaust steam that mud is evaporated gets into Sewage treatment systems after condensation.The low pressure saturated vapor recycles back into heat exchanger 1 through the outlet behind the desiccation machine 2.
Kiln tail gas discharges after entering kiln tail fly-ash separator 4 system purifications after through efficient heat exchanger 1.If need the sludge quantity Shanghai Communications University of mummification, or the low temperature waste gas amount is inadequately, just introduces 330 ℃ of high-temp waste gas of kiln tails partly through high temperature butterfly valve 7 and perhaps introduces the part high-temp waste gas of kiln hood cooling machine and be used as subsequent use and additional.

Claims (5)

1. device that utilizes cement kiln end low temperature waste gas dewatered sludge; Include efficient heat exchanger, wet sludge feeder, desiccation machine and dewatered sludge storehouse; It is characterized in that: be communicated with through air-supply duct between the steam introducing port of desiccation machine and the air outlet of efficient heat exchanger, be communicated with through water-supply line between the water outlet of desiccation machine and the water-in of efficient heat exchanger; Be communicated with through feeder sleeve between the opening for feed of desiccation machine and the discharge port of wet sludge feeder, the discharge port of desiccation machine is communicated with discharge tube outward, and discharge tube leads to the dewatered sludge storehouse; The smoke outlet of efficient heat exchanger is communicated with smoke exhaust pipe outward, and smoke exhaust pipe leads to kiln tail fly-ash separator, and the smoke outlet of kiln tail fly-ash separator is communicated with chimney.
2. a kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge according to claim 1 is characterized in that: the dewatered sludge discharge valve is installed on the said discharge tube.
3. a kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge according to claim 1 is characterized in that: be provided with water pump in the said water-supply line.
4. a kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge according to claim 1 is characterized in that: on the said air-supply duct valve is installed.
5. a kind of device that utilizes cement kiln end low temperature waste gas dewatered sludge according to claim 1 is characterized in that: said efficient heat exchanger is the heat pipe residual-heat exchanger, and desiccation machine is the hollow desiccation machine of disc type.
CN2011104068141A 2011-12-09 2011-12-09 Apparatus for dehydrating sludge by using cement kiln-tail low-temperature exhaust gas Pending CN102515456A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105222601A (en) * 2015-11-02 2016-01-06 北京建筑材料科学研究总院有限公司 A kind of method utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems

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CN202369480U (en) * 2011-12-09 2012-08-08 合肥水泥研究设计院 Device for anhydration of sludge by utilizing low-temperature tail exhaust gas of cement kiln

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CN201670796U (en) * 2010-04-28 2010-12-15 轻工业环境保护研究所 Sludge drying-incineration integrated treatment system
CN101857350A (en) * 2010-06-04 2010-10-13 合肥水泥研究设计院 Device for indirectly drying and utilizing sludge by cement kiln waste gas and process method thereof
CN202369480U (en) * 2011-12-09 2012-08-08 合肥水泥研究设计院 Device for anhydration of sludge by utilizing low-temperature tail exhaust gas of cement kiln

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ZHANG HE等: "Analysis of status quo, problems and potential about waste heat recovery of NSP cement production lines’ exhaust gas", 《2011 SECOND INTERNATIONAL CONFERENCE ON MECHANIC AUTOMATION AND CONTROL ENGINEERING, MACE 2011-PROCEEDINGS》, 18 August 2011 (2011-08-18), pages 6329 - 6332 *
赵钦新等: "我国余热利用现状与技术进展", 《工业锅炉》, no. 5, 31 December 2009 (2009-12-31), pages 8 - 15 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105222601A (en) * 2015-11-02 2016-01-06 北京建筑材料科学研究总院有限公司 A kind of method utilizing the moisture rubbish of waste heat mummification of quality coal in cement kiln systems
CN105222601B (en) * 2015-11-02 2017-04-19 北京建筑材料科学研究总院有限公司 Method for drying water-contained garbage by using afterheat of cement kiln system

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Application publication date: 20120627