CN102401554B - Drying system for plaster slab - Google Patents

Drying system for plaster slab Download PDF

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Publication number
CN102401554B
CN102401554B CN201010275407.7A CN201010275407A CN102401554B CN 102401554 B CN102401554 B CN 102401554B CN 201010275407 A CN201010275407 A CN 201010275407A CN 102401554 B CN102401554 B CN 102401554B
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arid region
heat
drying system
plaster slab
drying
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CN102401554A (en
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王鹏起
赵金平
周建中
李娜
谭丹君
王莹
冯小江
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Beijing New Building Material Group Co Ltd
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Beijing New Building Material Group Co Ltd
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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 invention discloses a drying system for a plaster slab. The drying system comprises a first drying area, a second drying area, a third drying area, a combustion device and a heat exchanger, wherein each drying area is provided with a circulating heat conduction exchange pipe and an inlet and an outlet of the circulating heat conduction exchange pipe; the first drying area and the second drying area are also provided with a humidity discharging device and an air supply device; the combustion device is used for combusting natural gas or coal; the heat exchanger air in a circulating hot wind exchange pipe is heated and returns to the first drying area and the second drying area; a heat exchange device is connected to the humidity discharging device and is used for exchanging heat steam discharged from the humidity discharging device into hot air and condensate water; the hot air is connected with a hot air supply device through pipes and is used for blowing the hot air to the first drying area and the second drying area; and the condensate water returns to a plaster slab production line system to be recycled. By the drying system, moisture and waste heat which are generated in the drying process can be collected effectively, the humidity environment and temperature environment in the drying process of the plaster slab can be improved and controlled, and the quality of the plaster slab is improved.

Description

A kind of drying system for plaster slab
Technical field
The application relates to a kind of production system for thistle board, particularly relates to a kind of drying system for plaster slab.
Background technology
Nearly all gypsum board production line is all to utilize fossil fuel (coal, natural gas etc.) to meet the heat energy demand in gypsum board manufacture process.These heat energy are mainly used in the production phases such as dry run of plasterboard base feed, gypsum sintering and plasterboard.
At plasterboard drying stage, the dry plasterboard passing through continuously of heat energy that utilizes fuel combustion to produce.Wet plasterboard water content before dry is about 25-35wt%, and after super-dry, water content is down to below 1wt%.Water in wet plasterboard is almost completely that the heat energy producing by fuel combustion evaporates.Prior art is verified: the quality that keeps specific RH value to be conducive to improve evaporation rate and to improve plasterboard in drying system.
As a rule, drying system for plaster slab has three regions, and each region all has hot air circulating pipe (or using conduction oil), and need to keep specific relative humidity and temperature.Burner is used for controlling temperature, and relative humidity regulates control by exhaust (wetting) and air entry.According to traditional dry run model, the dry of plasterboard can be divided into three phases: accelerate drying stage (corresponding the first arid region), constant rate of drying district stage (corresponding the second arid region) and falling rate drying period (corresponding the 3rd arid region).Yet in prior art, a large amount of steam that produce in drying steps do not obtain reasonably reclaiming and utilizing fully.
Summary of the invention
The problem existing for prior art, density of the present invention is to provide a kind of can make a large amount of waste heat of generation and the drying system for plaster slab that steam is recycled.
To achieve these goals, the application has adopted following technical scheme.
The invention provides a kind of drying system for plaster slab, comprising: first, second, and third arid region, first, second arid region includes import and outlet, for the circulation of circulating heat conduction oil; The 3rd arid region comprises import and outlet, for the inlet and outlet of cooled hot gas; Further, also comprise:
Burner and coupled heat exchanger, wherein, hot gas and circulating heat conduction oil that burner produces carry out heat exchange, and the conduction oil after heating is circulated and is entered first, second arid region by import; Through dirt pocket, dedusting enters the 3rd arid region to hot gas after heat exchange;
Air supply plant and humidity-discharging device, be positioned at first, second arid region, humidity-discharging device is connected with heat-exchanger rig, pass through heat-exchanger rig, the high-temperature vapor that humidity-discharging device is discharged and the ducted air of air supply plant carry out heat exchange heating, and the air after heating is evenly transported to the first and second arid regions by air supply plant and gas distribution face plate.
Preferably, the high-temperature vapor that described humidity-discharging device is discharged converts condensed water to after heat exchange, and this condensed water is with slurry and foam process for plasterboard batch plant.
Preferably, the waste heat that discharge described the 3rd arid region and steam are for heating the cold water of whipping process.
Preferably, also comprise the gypsum board panels pipeline that is arranged on described first, second arid region, the 3rd arid region.
Preferably, between described heat exchanger and the entrance of described first, second arid region, flow control valve is also installed.
Preferably, the top or the bottom that are positioned at every laminate material pipeline of described first, second arid region are all provided with for transmitting the exchanging tube of circulating heat conduction oil.
Preferably, in top or the bottom of every laminate material pipeline of described first, second arid region, described gas distribution face plate is all installed, for the hot gas of uniform transmission air supply plant transmission to gypsum board surface.
Preferably, in top or the bottom of every laminate material pipeline of described the 3rd arid region, gas distribution face plate is all installed, for the hot gas after uniform transmission air inlet transmission heat-exchange dedusting to gypsum board surface.
Preferably, the temperature of the hot gas that described burner produces is higher than 1000 ℃, and when circulating heat conduction oil enters described heat exchanger from outlet, temperature is 150-250 ℃; By described heat exchanger heats, arrive 300-350 ℃.
Preferably, after described heat exchanger heat exchange, the hot air temperature after heat exchange is lowered to about below 200 ℃.
Adopt drying system for plaster slab of the present invention can realize the utilization of industrial exhaust heat, improved the utilization rate of heat, shortened the production time; And in system design process, considered the Liquified gas tanker that plasterboard is dry, the heat and condensed water and the steam that have utilized targetedly dry run to produce, can improve and control humidity, the temperature environment of plasterboard dry run, improve the quality of plasterboard.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of drying system for plaster slab of the present invention.Accompanying drawing table in figure and the implication of representative are as follows:
The 11-the first arid region, the 12-the second arid region, the 13-the three arid region, the import of 14-circulating heat conduction oil exchanging tube, the outlet of 15-circulating heat conduction oil exchanging tube, 16-air inlet, 17-gas outlet, 21-burner, 22-cooled hot gas (comprising the flue gas that unreacted fuel produces), the hot gas that 23-burning produces (comprising the flue gas that unreacted fuel produces), 24-dust arrester, 25-heat exchanger, 26-flow control valve, 31-air supply plant, 32-heat-exchanger rig, 33-humidity-discharging device, 34-waste heat and steam, 35-mixing container.
The specific embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is explained in detail
As shown in Figure 1, drying system for plaster slab of the present invention comprises: the first arid region 11, the second arid region 12 and the 3rd arid region 13, burner 21 and the heat exchanger 25 being connected with burner 21, air supply plant 31, humidity-discharging device 33 and be arranged on the gypsum board panels pipeline (not shown go out) of the first arid region 11, the second arid region 12, the 3rd arid region 13, and concrete arranging is as follows:
First, second arid region 11,12 includes import 14 and exports 15, for the circulation of circulating heat conduction oil; The 3rd arid region 13 comprises import 16 and outlet 17, for the inlet and outlet of cooled hot gas.
The hot gas 23 that burner 21 produces carries out heat exchange with circulating heat conduction oil, and the conduction oil after heating enters first, second arid region 11,12 by import 14 circulations; Through dust arrester, 24 dedustings enter the 3rd arid region 13 to hot gas after heat exchange.
Air supply plant 31 and humidity-discharging device 33 are positioned at first, second arid region 11,12, humidity-discharging device 33 is connected with heat-exchanger rig 32, by heat-exchanger rig 32, the high-temperature vapor that humidity-discharging device 33 is discharged and the ducted air of air supply plant 31 carry out heat exchange heating, and the air after heating is evenly transported to the first and second arid regions 11,12 by air supply plant 31 and gas distribution face plate.Between the import 14 of heat exchanger 25 and first, second arid region 11,12, flow control valve 26 is also installed.
In addition, the top or the bottom that are positioned at every laminate material pipeline of first, second arid region 11,12 are all provided with for transmitting the exchanging tube of circulating heat conduction oil.Top or bottom at every laminate material pipeline of first, second arid region 11,12 are all provided with gas distribution face plate, for the hot gas of uniform transmission air supply plant 31 transmission to gypsum board surface.Top or bottom at every laminate material pipeline of the 3rd arid region 13 are all provided with gas distribution face plate, for the hot gas after uniform transmission air inlet 16 transmission heat-exchange dedustings to gypsum board surface.
Burner 21 of the present invention can adopt traditional gas burner or gas furnace.The hot air temperature that burning produces can be up to more than 1000 ℃.The hot gas that burner produces (comprising the flue gas that unreacted fuel produces) 23 directly enters heat exchanger 25, the circulating heat conduction oil that hot gas produces through heat exchange is (shown in arrow, by pipeline, transmit) through import 14, supply with the first arid region 11 and second arid region 12 of drying system for plaster slabs, circulating heat conduction oil is from exporting 15 when entering heat exchanger 25, temperature is 150-250 ℃, is preferably 250 ℃.After heat exchanger 25, be heated to 300-350 ℃.Circulating heat conduction oil after heating enters again the first arid region 11 and the second arid region 12 through flow control valve.These circulating heat conduction oils are for evaporating the wet plasterboard that is positioned at the first arid region 11 and the second arid region 12.After over-heat-exchanger 25, the hot gas that burning produces (comprising the flue gas that unreacted fuel produces) 23 temperature are lowered to about below 200 ℃.This cooled hot gas (comprising the flue gas that unreacted fuel produces) 22 passes through entrance 16 as the dry gas of the 3rd arid region 13 after dirt pocket 24 dedustings.
A large amount of high-temperature vapors that humidity-discharging device 33 produces for discharging evaporation process.By heat-exchanger rig 32 high-temperature vapors and the ducted air of air supply plant, carry out heat exchange, by the air heat in air duct to 120-150 ℃ of left and right, and be sent to respectively the first arid region 11 and the second arid region 12, for regulation and control relative humidity wherein.And this steam converts condensed water to, condensed water can be for plasterboard blending process, and for example and foaming with slurry for plasterboard batch plant used.Waste heat and steam 34 that the 3rd arid region produces can be for the heating of cold water in mixing tank for coating colors.
The sheet material pipeline of drying system for plaster slab of the present invention can carry 1～12 laminate to be dried in the vertical direction.Sheet material pipeline preferably adopts the carrying roller pipeline consisting of carrying roller and carrying roller transmission mechanism.In addition, top or bottom installation by every laminate material pipeline guarantee the first arid region 11 and the second dry uniformity in arid region 12 for transmitting the exchanging tube (not shown) of circulating heat conduction oil, and air supply plant 31 is sent into is heated to 100-150 ℃ of above air and can passes through gas distribution face plate, in the space of the first arid region 11 and the second arid region 12, is uniformly distributed.The structure of distributing panel and structure, can utilize the disclosed structure of known prior art.
It should be noted that, Fig. 1 only represents the schematic diagram of drying system for plaster slab of the present invention, and the ordinary skill knowledge that humidity-discharging device wherein, air supply plant, outlet, entrance location can be grasped according to those skilled in the art designs.The first and second arid region arrows be only used to refer to signal circulating heat conduction oil (being positioned at circulating heat conduction oil pipe, not shown) path, but and non-limiting its path as shown in Figure 1.In addition, in order to simplify accompanying drawing, circulating heat conduction oil exchanging tube and plasterboard conveying device in figure, have been omitted.And, in order to improve productive rate, can multi-layered board pipeline be set in drying system in the vertical direction, these features all do not illustrate in the drawings.
Adopt drying system for plaster slab of the present invention can realize the utilization of industrial exhaust heat, improved the utilization rate of heat, shortened the production time; And in system design process, considered the Liquified gas tanker that plasterboard is dry, the heat and condensed water and the steam that have utilized targetedly dry run to produce, can improve and control humidity, the temperature environment of plasterboard dry run, improve the quality of plasterboard.

Claims (10)

1. a drying system for plaster slab, comprising: first, second, and third arid region, and first, second arid region includes import and outlet, for the circulation of circulating heat conduction oil; The 3rd arid region comprises import and outlet, for the inlet and outlet of cooled hot gas; It is characterized in that, also comprise:
Burner and coupled heat exchanger, wherein, hot gas and circulating heat conduction oil that burner produces carry out heat exchange, and the conduction oil after heating is circulated and is entered first, second arid region by import; Through dirt pocket, dedusting enters the 3rd arid region to hot gas after heat exchange;
Air supply plant and humidity-discharging device, be positioned at first, second arid region, humidity-discharging device is connected with heat-exchanger rig, pass through heat-exchanger rig, the high-temperature vapor that humidity-discharging device is discharged and the ducted air of air supply plant carry out heat exchange heating, and the air after heating is evenly transported to the first and second arid regions by air supply plant and gas distribution face plate.
2. drying system for plaster slab as claimed in claim 1, is characterized in that, the high-temperature vapor that described humidity-discharging device is discharged converts condensed water to after heat exchange, and this condensed water is with slurry and foam process for plasterboard batch plant.
3. drying system for plaster slab as claimed in claim 1, is characterized in that, the waste heat that discharge described the 3rd arid region and steam are for heating the cold water of whipping process.
4. drying system for plaster slab as claimed in claim 1, is characterized in that, also comprises the gypsum board panels pipeline that is arranged on described first, second arid region, the 3rd arid region.
5. drying system for plaster slab as claimed in claim 1, is characterized in that, between described heat exchanger and the entrance of described first, second arid region, flow control valve is also installed.
6. drying system for plaster slab as claimed in claim 4, is characterized in that, the top or the bottom that are positioned at every laminate material pipeline of described first, second arid region are all provided with for transmitting the exchanging tube of circulating heat conduction oil.
7. drying system for plaster slab as claimed in claim 4, it is characterized in that, top or bottom at every laminate material pipeline of described first, second arid region are all provided with described gas distribution face plate, for the hot gas of uniform transmission air supply plant transmission to gypsum board surface.
8. drying system for plaster slab as claimed in claim 4, it is characterized in that, top or bottom at every laminate material pipeline of described the 3rd arid region are all provided with gas distribution face plate, for the hot gas after uniform transmission air inlet transmission heat-exchange dedusting to gypsum board surface.
9. the drying system for plaster slab as described in as arbitrary in claim 1 to 8, is characterized in that, the temperature of the hot gas that described burner produces is higher than 1000 ℃, and when circulating heat conduction oil enters described heat exchanger from outlet, temperature is 150-250 ℃; By described heat exchanger heats, arrive 300-350 ℃.
10. drying system for plaster slab as claimed in claim 9, is characterized in that, after described heat exchanger heat exchange, the hot air temperature after heat exchange is lowered to below 200 ℃.
CN201010275407.7A 2010-09-07 2010-09-07 Drying system for plaster slab Active CN102401554B (en)

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CN102401554B true CN102401554B (en) 2014-03-12

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CN103940208B (en) * 2014-04-10 2015-12-02 山东六九矿业装备科技有限公司 Plasterboard industrial exhaust heat drying system
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CN107056109B (en) * 2017-06-21 2022-08-05 河南强耐新材股份有限公司 Environment-friendly and energy-saving production system for manufacturing gypsum
UA126003C2 (en) 2017-11-28 2022-07-27 Етекс Білдінг Перфоманс Інтернешнл Сас Sheet drying method and arrangement
CN109059528A (en) * 2018-08-31 2018-12-21 江苏天通设备科技有限公司 A kind of baking oven residual neat recovering system
CN108919867B (en) * 2018-09-11 2021-04-16 宁波北新建材有限公司 Control method of temperature and humidity control system of gypsum board drying system
CN110398138A (en) * 2019-08-29 2019-11-01 宁波万立杰普顺装饰材料有限公司 Gypsum line multi-temperature zone baking oven
CN110411264A (en) * 2019-08-29 2019-11-05 宁波万立杰普顺装饰材料有限公司 Gypsum line heat exchange structure
CN115200348B (en) * 2022-07-25 2023-09-29 德州高峰淀粉有限公司 Starch clot stoving powder process equipment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311261A1 (en) * 1975-05-12 1976-12-10 Electricite De France Gypsum plate drying process - uses superheated water vapour in first zone and dry hot air in second zone
JP2005297245A (en) * 2004-04-07 2005-10-27 Zero System:Kk Drier for plasterboard
CN2823942Y (en) * 2005-08-29 2006-10-04 山东泰和东新股份有限公司 Hot air drier for paper face gypsum board
CN201463488U (en) * 2009-03-11 2010-05-12 泰山石膏股份有限公司 Coal-to-gas direct-fired dry gypsum board device
CN101782314A (en) * 2009-01-16 2010-07-21 北新集团建材股份有限公司 Efficient process for low-temperature steam drying

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311261A1 (en) * 1975-05-12 1976-12-10 Electricite De France Gypsum plate drying process - uses superheated water vapour in first zone and dry hot air in second zone
JP2005297245A (en) * 2004-04-07 2005-10-27 Zero System:Kk Drier for plasterboard
CN2823942Y (en) * 2005-08-29 2006-10-04 山东泰和东新股份有限公司 Hot air drier for paper face gypsum board
CN101782314A (en) * 2009-01-16 2010-07-21 北新集团建材股份有限公司 Efficient process for low-temperature steam drying
CN201463488U (en) * 2009-03-11 2010-05-12 泰山石膏股份有限公司 Coal-to-gas direct-fired dry gypsum board device

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