CN103245197B - Waste heat recycling system for ceramic kilns - Google Patents
Waste heat recycling system for ceramic kilns Download PDFInfo
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- CN103245197B CN103245197B CN201310161854.3A CN201310161854A CN103245197B CN 103245197 B CN103245197 B CN 103245197B CN 201310161854 A CN201310161854 A CN 201310161854A CN 103245197 B CN103245197 B CN 103245197B
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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
Abstract
A waste heat recycling system for ceramic kilns comprises the ceramic kilns, water pipes, plate heat exchangers and slurry pipes. Heating sections of the water pipes are mounted below roll bars of slow cooling sections of the ceramic kilns, and penetrate through the ceramic kilns in a zigzag reciprocating manner, and pipelines exposed out of the ceramic kilns are wrapped by heat-insulation layers; heat exchange sections of the water pipes and the slurry pipes are subjected to heat exchange at the plate heat exchangers; the water pipes and the plate heat exchangers are subjected to countercurrent heat exchange; and distances among plates of the plate heat exchangers range from 1.5mm to 3.5mm, and the thickness of each stainless steel heat exchange plate of each plate heat exchanger ranges from 0.5mm to 1.5mm. The waste heat recycling system has the advantages that the technical difficult problem of utilizing waste heat of kilns to heat slurry is solved, and waste heat of the kilns can be sufficiently utilized in a ceramic manufacturing process owing to characteristics of the short distances among the plates, large heat exchange areas, sufficient disturbance in a water and slurry flowing procedure and extremely high heat exchange efficiency of the plate heat exchangers.
Description
Technical field
The present invention relates to the energy-conserving and environment-protective technical field of ceramic industry, particularly relate to a kind of ceramic kiln waste heat recycling system.
Background technology
Pottery will fire shaping at the temperature of 1200 DEG C, and long ceramic kiln has a lot of roller rod from the inlet to the outlet, and ceramic blank is slowly movement on roller rod, burns till when arriving outlet.Air heat energy in kiln can be recycled completely, has the way of recycling of two kinds of using residual heat from kiln furnace at present.One reclaims hot blast, and such as Authorization Notice No. is the Chinese utility model patent of CN201152691Y, and it adopts air-introduced machine extraction kiln hot air to carry out blank drying.Another kind is Recovery of the hot water, such as application publication number is the application for a patent for invention of CN102313455A, several water tanks are installed at the top of furnace slow-cooling back segment and replace kiln top, namely can reduce the material that kiln manufactures, hot water can be reclaimed again as daily life water.
Above-mentioned way of recycling is each has something to recommend him, but the utilization ratio of waste heat is obviously not high.Heat exchanger effectiveness is just not high originally to adopt the mode extracting hot blast, and the heat storage capacity of air is not strong.Adopt Recovery of the hot water mode not by UTILIZATION OF VESIDUAL HEAT IN in ceramic process.Pottery manufactures in whole technological process the place that needs to use heat and few, and why can not make full use of the using residual heat from kiln furnace being easy to reclaim, be because the inertial thinking of those skilled in the art thinks that hot water cannot make full use of in other processing steps.
Summary of the invention
The object of the invention is to propose a kind of ceramic kiln waste heat recycling system, its heat recovery efficiency is high.
For achieving the above object, provide following technical scheme.
A kind of ceramic kiln waste heat recycling system, comprise ceramic kiln, water pipe, heat-exchangers of the plate type and slurry pipe, the bringing-up section of described water pipe is arranged on the below of the roller rod of the slow cooling section of described ceramic kiln, with snakelike back and forth through described ceramic kiln, and the pipeline portions heat-insulation layer being exposed at described ceramic kiln outside is wrapped up; The heat exchanging segment of described water pipe carries out heat exchange at described heat-exchangers of the plate type place and slurry pipe; Described water pipe and heat-exchangers of the plate type countercurrent flow; Described slurry pipe was provided with two-stage sieve before entering heat-exchangers of the plate type, and the first order is 40 ~ 60 mesh sieves, and the second level is 80 ~ 100 mesh sieves; The distance between plates of described heat-exchangers of the plate type is 1.5-3.5mm, and the thickness of the stainless steel heat exchanger plates of described heat-exchangers of the plate type is 0.5-1.5mm.
The distance between plates of described heat-exchangers of the plate type is 2-3mm, and the thickness of the stainless steel heat exchanger plates of described heat-exchangers of the plate type is 0.5-1.0mm.
The distance between plates of the stainless steel heat exchanger plates of described heat-exchangers of the plate type is 3mm, and the thickness of the stainless steel heat exchanger plates of described heat-exchangers of the plate type is 0.7mm.
Pressure in the slurry pipe of described heat-exchangers of the plate type is 6-9 kgf.
The heat supply water pipe for water outlet of the described ceramic kiln of outflow of described water pipe is the water pipe of internal diameter Ф 50-80mm, and time cold water pipe for backwater of the described ceramic kiln of inflow of described water pipe is the water pipe of internal diameter Ф 100-150mm.
Described heat supply water pipe is provided with hot-water cylinder, and described time cold water pipe is provided with water return tank.
There is pipeline connection between described hot-water cylinder and water return tank, this pipeline is provided with valve.
Described slurry pipe exports the slurry pipe of ceramic raw material after being ball milling operation.
The pipeline section after magnetic separator de-ironing of described slurry pipe is communicated in large rotary strainer, transfer tank and spray tower successively.
Preferably, comprise at least two described ceramic kilns and at least two and overlap the slurry treatment system be made up of described heat-exchangers of the plate type, magnetic separator de-ironing, large rotary strainer, transfer tank and spray tower, it is be communicated in described hot-water cylinder after a heat supply water pipe that the water pipe of each described ceramic kiln gathers; With often overlap described slurry treatment system carry out heat exchange after water pipe gather and be one and return after cold water pipe and be communicated in described water return tank.
The invention solves the technical barrier utilizing using residual heat from kiln furnace heated slurry, heat-exchangers of the plate type due to distance between plates very little, heat-transfer surface is very large, and in the flow process of water and slurry, there is sufficient disturbance, the high using residual heat from kiln furnace that makes of heat exchange efficiency makes full use of in ceramic process, overcomes the technology prejudice of those skilled in the art.
Accompanying drawing explanation
Fig. 1 is the shape assumption diagram of the heat-exchangers of the plate type of one embodiment of the present of invention.
Fig. 2 is the internal structure schematic diagram of the heat-exchangers of the plate type of one embodiment of the present of invention.
Fig. 3 is the water pipe of one embodiment of the present of invention and the structural representation of ceramic kiln.
Fig. 4 is the system diagram of one embodiment of the present of invention.
Reference numeral: ceramic kiln 1, roller rod 11, water pipe 2, heat-exchangers of the plate type 3, baffle 31, pitman 32, stainless steel heat exchanger plates 33, pipe inlet 35, pipe outlet 36, slurry pipe entrance 37, slurry pipe outlet 38, slurry pipe 4, heat supply water pipe 21, time cold water pipe 22, hot-water cylinder 23, water return tank 24, magnetic separator de-ironing 5, large rotary strainer 6, transfer tank 7, spray tower 8, the thickness m of heat exchanger plates 33, distance between plates n.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.
Heat-exchangers of the plate type 3 is made up of stamping concavo-convex stainless steel heat exchanger plates 33, hot water and slurry are respectively in the both sides of stainless steel heat exchanger plates 33, concave convex texture between adjacent stainless steel heat exchanger plates 33 becomes 180 degree of relative combinations, therefore the concavo-convex crestal line between stainless steel heat exchanger plates 33 defines staggered contact point, and these staggered currency structures make the cold fluid and hot fluid in heat-exchangers of the plate type 3 produce strong turbulent flow and reach high heat transfer effect.Heat-exchangers of the plate type 3 is a kind of industrial conventional heat exchangers, but never someone is applied in the heating process of ceramic size.
Ceramic powder by raw material through ball milling, deironing, to sieve and the operation such as spraying is formed.In spray step, under the slurry after heating is sprayed by spray tower, high temperature air upwards brushes, and by the moisture evaporation in slurry, thus leaves dry powder.In spray tower, the temperature of slurry is extremely important, adopts the mode of conventional heating water to heat in prior art.Due to the powder that the ceramic powder in slurry is very fine and smooth, never someone considered to utilize heat-exchangers of the plate type to heat slurry, blocked the passage of heat-exchangers of the plate type after being in fear of the powder deposition in slurry.
The ceramic kiln waste heat recycling system of the present embodiment, as Figure 1-4, comprise ceramic kiln 1, water pipe 2, heat-exchangers of the plate type 3 and slurry pipe 4, the bringing-up section of described water pipe 2 is arranged on the below of the roller rod 11 of the slow cooling section of described ceramic kiln 1, with snakelike back and forth through described ceramic kiln 1, and the pipeline portions heat-insulation layer being exposed at described ceramic kiln 1 outside is wrapped up; The heat exchanging segment of described water pipe 2 carries out heat exchange at described heat-exchangers of the plate type 3 place and slurry pipe 4; Described water pipe 2 and heat-exchangers of the plate type 3 countercurrent flow; Described slurry pipe 4 was provided with two-stage sieve before entering heat-exchangers of the plate type 3, and the first order is 40 ~ 60 mesh sieves, and the second level is 80 ~ 100 mesh sieves; The distance between plates n of described heat-exchangers of the plate type 3 is 1.5-3.5mm, and the thickness m of the stainless steel heat exchanger plates of described heat-exchangers of the plate type 3 is 0.5-1.5mm.
In the present embodiment, the stainless steel heat exchanger plates 33 of heat-exchangers of the plate type 3 is also corrugated (for the purpose of expression is clear, the corrugated of stainless steel heat exchanger plates 33 is not drawn) in Fig. 2, but sieve that (one-level crosses 40 ~ 60 mesh sieves because slurry has carried out secondary before entering the passage between heat-exchangers of the plate type 3, secondary crosses 80 ~ 100 mesh sieves), and slurry plate type heat exchanger 3 through heating after, mobility improves about 2 times, so just can avoid blocking deposition.
As the heat-exchangers of the plate type 3 of Fig. 1 and Fig. 2, solve the technical barrier utilizing using residual heat from kiln furnace heated slurry, heat-exchangers of the plate type 3 due to distance between plates n very little, heat-transfer surface is very large, and in the flow process of water and slurry, there is sufficient disturbance, the high using residual heat from kiln furnace that makes of heat exchange efficiency makes full use of in ceramic process, overcomes the technology prejudice of those skilled in the art.
Preferably, the distance between plates of described heat-exchangers of the plate type 3 is 2-3mm, and the thickness of the heat exchanger plates of described heat-exchangers of the plate type 3 is 0.5-1.0mm.Preferred further, the distance between plates of the heat exchanger plates of described heat-exchangers of the plate type 3 is 3mm, and the thickness of the heat exchanger plates of described heat-exchangers of the plate type 3 is 0.7mm.Pressure in the slurry pipe 4 of described heat-exchangers of the plate type 3 is 6-9 kgf.Through repeatedly testing, above-mentioned size and pressure can utilize using residual heat from kiln furnace in maximum efficiency, have higher utilization ratio.
The heat supply water pipe 21 for water outlet of the described ceramic kiln 1 of outflow of described water pipe 2 is the water pipe of internal diameter 3 inches, and time cold water pipe 22 for backwater of the described ceramic kiln 1 of inflow of described water pipe 2 is the water pipe of internal diameter 6 inches.
Why will heat supply water pipe 21 be set to Ф 50-80mm? reason is:
1, water pipe 2 heats in ceramic kiln 1, should be arranged on the slow cooling district (being divided into preheating zone, firing zone, quench zone, slow cooling district, strong cooling section in ceramic kiln 1 successively) of ceramic kiln 1.Concerning ceramic kiln 1, being do not have effective from the using residual heat from kiln furnace after quench zone, if heat supply water pipe is located at quench zone, is can cause the distortion to product, even ftracture; And the length of strong cooling section shorter (only having about 20 meters), and temperature is below 200 DEG C, the heat exchanger effectiveness of hot-air and water is too low, can not expire the temperature requirement of hot water.
2, the kiln of 180 meters long, slow cooling section length about 40 meters, and temperature is between 500 DEG C to 250 DEG C, hot-air and water heat production no impact herein, according to service clearance and heat energy formulae discovery in the slurry amount that need heat and temperature, kiln, select heat supply water pipe 21 for Ф 50-80mm, water heats herein and also easily meets water temperature requirement, and true use proves it is also correct.
Why return cold water pipe 22 and will be set to Ф 100-150mm? because returning cold water pipe 22 is gathering tubes, gathering tube divides branched water pipe to go to multiple ceramic kiln 1 place to heat again, is rational by flow rate calculation.
Described heat supply water pipe 21 is provided with hot-water cylinder 23, and described time cold water pipe 22 is provided with water return tank 24.There is pipeline connection between described hot-water cylinder 23 and water return tank 24, this pipeline is provided with valve.The heat supply water pipe 21 of multiple ceramic kiln 1 is convenient to concentrate in together the work carrying out heated slurry pipe 4 at heat-exchangers of the plate type 3.Hot-water cylinder 23 and water return tank 24, as the transfer water pot of water pump, can stablize pressure and the flow of water pump; The centre of hot-water cylinder 23 and water return tank 24 will have the effect of connecting pipe and valve to be the hot water temperature that can adopt manual adjustment heated slurry, makes slurry be in normal temperature range 70 ~ 90 DEG C.
Described slurry pipe 4 exports the slurry pipe 4 of ceramic raw material after being ball milling operation.The pipeline section after magnetic separator de-ironing 5 of described slurry pipe 4 is communicated in large rotary strainer 6, transfer tank 7 and spray tower 8 successively.
The benefit of these setting process is:
1, after slurry heating, final purpose is to spray tower 8 use, and in order to spray tower 8 can obtain the higher slurry of temperature, heat-exchange apparatus will be located at spray tower side as far as possible;
2, slurry is by hot water heating in heat-exchangers of the plate type 3, have pressure, and this is in order to avoid slurry is jammed in heat-exchangers of the plate type 3 li;
3, the slurry of slurry pipe 4 is lose pressure after having crossed magnetic separator de-ironing 5, but is gone atomization in spray tower 8 to dry by plunger displacement pump pressurization again after transfer tank 7;
4, the slurry of slurry pipe 4 is after heating, then removes magnetic separator de-ironing 5, be the irony in order to more easily remove in slurry, make product can not find the defect of iron tramp (stain); And the slurry of heat sieves more easily, efficiency is higher, improves slurry sophistication further and reduces impurity;
5, the slurry of slurry pipe 4 will arrive transfer tank 7 just in order to spray tower 8 obtains pressure and the constant slurry of atomizing effect.
The present embodiment comprises at least two described ceramic kilns 1 and at least two and overlaps the slurry treatment system be made up of described heat-exchangers of the plate type 3, magnetic separator de-ironing 5, large rotary strainer 6, transfer tank 7 and spray tower 8, and it is be communicated in described hot-water cylinder 23 after a heat supply water pipe 2 that the water pipe 2 of each described ceramic kiln 1 gathers; With often overlap described slurry treatment system carry out heat exchange after water pipe 2 gather and be one and return after cold water pipe 22 and be communicated in described water return tank 24.It is be communicated in described hot-water cylinder 23 after a heat supply water pipe 2 that water pipe 2 gathers, and can save pipeline material and be convenient to layout pipeline.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (2)
1. a ceramic kiln waste heat recycling system, it is characterized in that: comprise ceramic kiln, water pipe, heat-exchangers of the plate type and slurry pipe, the bringing-up section of described water pipe is arranged on the below of the roller rod of the slow cooling section of described ceramic kiln, with snakelike back and forth through described ceramic kiln, and the pipeline portions heat-insulation layer being exposed at described ceramic kiln outside is wrapped up; The heat exchanging segment of described water pipe carries out heat exchange at described heat-exchangers of the plate type place and slurry pipe; Described water pipe and heat-exchangers of the plate type countercurrent flow; Described slurry pipe was provided with two-stage sieve before entering heat-exchangers of the plate type, and the first order is 40 ~ 60 mesh sieves, and the second level is 80 ~ 100 mesh sieves; The distance between plates of described heat-exchangers of the plate type is 1.5-3.5mm, and the thickness of the stainless steel heat exchanger plates of described heat-exchangers of the plate type is 0.5-1.5mm.
2. ceramic kiln waste heat recycling system according to claim 1, is characterized in that: the distance between plates of described heat-exchangers of the plate type is 2-3mm, and the thickness of the stainless steel heat exchanger plates of described heat-exchangers of the plate type is 0.5-1.0mm.
3. ceramic kiln waste heat recycling system according to claim 1, is characterized in that: the pressure in the slurry pipe of described heat-exchangers of the plate type is 6-9 kgf.
4. ceramic kiln waste heat recycling system according to claim 1, is characterized in that: the supplying hot water bore of described heat-exchangers of the plate type is Ф 50-80mm, and time cold water pipe internal diameter of described heat-exchangers of the plate type is Ф 100-150mm.
5. ceramic kiln waste heat recycling system according to claim 4, is characterized in that: described heat supply water pipe is provided with hot-water cylinder, and described time cold water pipe is provided with water return tank, has pipeline connection, pipeline is provided with valve between described hot-water cylinder and water return tank.
6. ceramic kiln waste heat recycling system according to claim 5, is characterized in that: the pipeline section of described slurry pipe after magnetic separator de-ironing is communicated in large rotary strainer, transfer tank and spray tower successively.
7. ceramic kiln waste heat recycling system according to claim 6, it is characterized in that: comprise at least two described ceramic kilns and at least two and overlap the slurry treatment system be made up of described heat-exchangers of the plate type, magnetic separator de-ironing, large rotary strainer, transfer tank and spray tower, it is be communicated in described hot-water cylinder after a heat supply water pipe that the water pipe of each described ceramic kiln gathers; With often overlap described slurry treatment system carry out heat exchange after water pipe gather and be one and return after cold water pipe and be communicated in described water return tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310161854.3A CN103245197B (en) | 2013-05-03 | 2013-05-03 | Waste heat recycling system for ceramic kilns |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310161854.3A CN103245197B (en) | 2013-05-03 | 2013-05-03 | Waste heat recycling system for ceramic kilns |
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| CN103245197A CN103245197A (en) | 2013-08-14 |
| CN103245197B true CN103245197B (en) | 2015-01-07 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201476597U (en) * | 2009-05-12 | 2010-05-19 | 江西省陶瓷研究所 | Ceramic kiln smoke purifying and surplus heat comprehensive utilization device |
| CN101279849B (en) * | 2008-05-26 | 2011-09-28 | 广东欧文莱陶瓷有限公司 | Energy-saving emission reduction process for ceramic production |
| CN202770228U (en) * | 2012-07-06 | 2013-03-06 | 广东中窑窑业股份有限公司 | Furnace waste heat recycling device of spray drying tower in ceramic industry |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090004615A1 (en) * | 2007-06-27 | 2009-01-01 | Graham Robert G | Roller hearth calcining furnace and method of use |
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- 2013-05-03 CN CN201310161854.3A patent/CN103245197B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101279849B (en) * | 2008-05-26 | 2011-09-28 | 广东欧文莱陶瓷有限公司 | Energy-saving emission reduction process for ceramic production |
| CN201476597U (en) * | 2009-05-12 | 2010-05-19 | 江西省陶瓷研究所 | Ceramic kiln smoke purifying and surplus heat comprehensive utilization device |
| CN202770228U (en) * | 2012-07-06 | 2013-03-06 | 广东中窑窑业股份有限公司 | Furnace waste heat recycling device of spray drying tower in ceramic industry |
Non-Patent Citations (1)
| Title |
|---|
| "喷雾干燥技术基本原理与生产控制";蔡飞虎等;《佛山陶瓷》;20100131;第20卷(第1期);全文 * |
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Effective date of registration: 20170413 Address after: 528031 Chancheng, Foshan District, Jiangwan, No. three, No., layer 8, layer two Co-patentee after: Guangdong Dongpeng Holdings Co., Ltd. Patentee after: Foshan Dongpeng Ceramic Co., Ltd. Co-patentee after: Qingyuan Nafuna Ceramics Co.,Ltd. Co-patentee after: Donghua Foshan New Material Co., Ltd. Address before: 528031 Chancheng, Foshan, Jiangwan District, No. three, No. 8, No. layer on the first floor, No. 1 Co-patentee before: Guangdong Dongpeng Holdings Co., Ltd. Patentee before: Guangdong Dongpeng Ceramic Co., Ltd. Co-patentee before: Qingyuan Nafuna Ceramics Co.,Ltd. Co-patentee before: Foshan Dongpeng Ceramic Co., Ltd. |