CN110398157B - Efficient tail gas heat energy recovery equipment of rotary furnace and use method thereof - Google Patents
Efficient tail gas heat energy recovery equipment of rotary furnace and use method thereof Download PDFInfo
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- CN110398157B CN110398157B CN201910801591.5A CN201910801591A CN110398157B CN 110398157 B CN110398157 B CN 110398157B CN 201910801591 A CN201910801591 A CN 201910801591A CN 110398157 B CN110398157 B CN 110398157B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/10—Arrangements for using waste heat
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- General Engineering & Computer Science (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
本发明涉及一种旋转炉的尾气热能高效回收设备，包括尾气缓冲排出罐、热能回收机构和空压机，所述尾气缓冲罐的底部通过相应的尾气进入管连通连接到旋转炉的尾气排出管上，尾气缓冲罐的顶部设有相应的排气管，所述热能回收机构包含密封贯穿所述尾气缓冲罐上下端的换热进气管和换热排气管，所述换热进气管和换热排气管之间连通连接有一相应的换热筒体，所述换热筒体的直径大于所述换热排气管，所述换热排气管的直径大于所述换热进气管；所述换热排气管连接到所述空压机的进气口，所述空压机的排气口通过相应的减压阀连接到旋转炉的进气管上。本发明可有效大幅提升对旋转炉的尾气热能的再利用率，且结构简单，制造运行成本低廉。
The invention relates to a high-efficiency recovery equipment for tail gas heat energy of a rotary furnace, comprising a tail gas buffer discharge tank, a heat energy recovery mechanism and an air compressor. The bottom of the tail gas buffer tank is connected to the tail gas discharge pipe of the rotary furnace through a corresponding tail gas inlet pipe. The top of the tail gas buffer tank is provided with a corresponding exhaust pipe, and the heat energy recovery mechanism includes a heat exchange intake pipe and a heat exchange exhaust pipe that seal through the upper and lower ends of the tail gas buffer tank. The heat exchange intake pipe and the heat exchange exhaust pipe A corresponding heat exchange cylinder is communicated and connected between the exhaust pipes, the diameter of the heat exchange cylinder is larger than that of the heat exchange exhaust pipe, and the diameter of the heat exchange exhaust pipe is larger than that of the heat exchange intake pipe; The heat exchange exhaust pipe is connected to the intake port of the air compressor, and the exhaust port of the air compressor is connected to the intake pipe of the rotary furnace through a corresponding pressure reducing valve. The invention can effectively and greatly improve the recycling rate of the heat energy of the exhaust gas of the rotary furnace, and has the advantages of simple structure and low manufacturing and operation cost.
Description
Technical Field
The invention relates to tail gas heat energy recovery equipment for rotary furnace production, in particular to tail gas heat energy efficient recovery equipment for a rotary furnace and a using method thereof.
Background
The rotary furnace, also known as hot air rotary furnace, is a device for heating a combustion chamber by using various different energy sources, feeding hot air into a hearth through a heat exchanger and a fan, and baking articles in the furnace. The hot air enters the oven body to bake the rotating articles and then is discharged along an exhaust gas discharge pipe of the rotating oven, and the exhaust gas contains substances such as moisture generated by baking the articles, so that the exhaust gas cannot be directly recycled. At present, the tail gas heat energy of the rotary furnace is generally recycled by contacting with the tail gas through various heat exchangers, and then the heat exchange is realized to recycle the tail gas heat energy of the rotary furnace. Because of the extremely low heat energy conversion rate and the extremely limited economic value, many manufacturers give up the development of recycling the heat energy of the tail gas of the rotary furnace. At present, no research is made on recycling of thermal energy of exhaust gas of a rotary kiln in actual use, patent grids, and various documents. The application range of the rotary furnace covers many fields of food, crops, tobacco, medicinal material processing and the like, the actual usage amount of the rotary furnace is extremely large, and the rotary furnace has great significance in recycling the heat energy of tail gas of the rotary furnace at the present time when the energy conservation and emission reduction is increasingly emphasized. Therefore, the efficient tail gas heat energy recovery equipment for the rotary furnace is designed, can effectively and greatly improve the reutilization rate of the tail gas heat energy of the rotary furnace, is simple in structure and low in manufacturing and operating cost, and is suitable for wide popularization.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-efficiency tail gas heat energy recovery device of a rotary furnace, which can effectively solve the problems in the prior art.
The technical scheme of the invention is as follows:
the tail gas heat energy efficient recovery equipment of the rotary furnace comprises a tail gas buffer discharge tank, a heat energy recovery mechanism and an air compressor, wherein the tail gas buffer discharge tank is vertically arranged, the bottom of the tail gas buffer tank is communicated and connected to a tail gas discharge pipe of the rotary furnace through a corresponding tail gas inlet pipe, a corresponding exhaust pipe is arranged at the top of the tail gas buffer tank, the heat energy recovery mechanism comprises a heat exchange air inlet pipe and a heat exchange exhaust pipe which hermetically penetrate through the upper end and the lower end of the tail gas buffer tank, a corresponding heat exchange barrel is communicated and connected between the heat exchange air inlet pipe and the heat exchange exhaust pipe, the diameter of the heat exchange barrel is larger than that of the heat exchange exhaust pipe, and the diameter of the heat; the heat exchange exhaust pipe is connected to an air inlet of the air compressor, and an air outlet of the air compressor is connected to an air inlet pipe of the rotary furnace through a corresponding pressure reducing valve.
The diameter ratio of the heat exchange cylinder, the heat exchange exhaust pipe and the heat exchange air inlet pipe is 5-8:1.2-1.8: 1.
The tail gas inlet pipe is provided with a corresponding gas inlet electromagnetic valve, and the exhaust pipe is provided with a corresponding exhaust electromagnetic valve.
And a corresponding pressure gauge is arranged on one side of the tail gas buffer tank.
The tail gas buffer tank is composed of a shell and an inner container interlayer, and a corresponding heat insulation material layer is filled between the shell and the inner container.
And a corresponding liquid discharge pipe is communicated with the middle position of the bottom of the tail gas buffer tank, and a corresponding liquid discharge valve is arranged on the liquid discharge pipe in a fixing way.
And the tail gas buffer tank is fixedly supported by a corresponding support frame.
A use method of tail gas heat energy efficient recovery equipment of a rotary furnace comprises the following steps:
1) starting the rotary furnace, starting an air compressor, pressurizing and heating air by the air compressor after the air passes through the heat exchange cylinder, and sending the air into an air inlet pipe of the rotary furnace along a pressure reducing valve for use;
2) opening an air inlet electromagnetic valve to enable tail gas generated by processing of the rotary furnace to effectively enter a tail gas buffer discharge tank along a tail gas inlet pipe;
3) observing a display numerical value of the pressure gauge, and opening the exhaust electromagnetic valve to perform exhaust operation when the pressure value in the tail gas buffer discharge tank reaches a certain level;
4) the air compressor continuously operates, air is continuously subjected to heat exchange with tail gas through the heat exchange barrel, is further pressurized and heated through the air compressor, and is sent into an air inlet pipe of the rotary furnace along the pressure reducing valve for use;
5) stopping the operation of the rotary furnace, stopping the operation of the air compressor, checking the display numerical value of the pressure gauge, and closing the air inlet electromagnetic valve and the exhaust electromagnetic valve when the pressure value in the tail gas buffering and discharging tank is reduced to normal pressure;
6) and opening a liquid discharge valve to discharge the liquid in the tail gas buffer tank.
The invention has the advantages that:
according to the tail gas heat recovery device, the retention time of tail gas in the tail gas buffer discharge tank is effectively prolonged through the arrangement of the tail gas buffer discharge tank, so that the heat exchange time between the tail gas and the heat energy recovery mechanism is prolonged, and the heat exchange efficiency is effectively improved. Along with the continuous entering of tail gas, the pressure increase in the tail gas buffering discharge tank still can improve the temperature of tail gas to a certain extent along with the increase of pressure, when the manometer shows that the pressure in the tail gas buffering discharge tank reaches a definite value, open exhaust solenoid valve again and carry out exhaust emission, effectively last control the pressure in the tail gas buffering discharge tank at a definite value scope to further effectively promote the heat utilization ratio to tail gas.
In the heat exchange process, the air compressor continuously operates, and after the gas in the heat exchange cylinder is effectively pressurized, the gas is continuously sent into the gas inlet pipe of the rotary furnace along the pressure reducing valve. Along with the continuous operation of air compressor machine, atmospheric pressure in the heat transfer cylinder body reduces to reduced the gas temperature in the heat transfer cylinder body, promoted the heat exchange rate of the gas in the heat transfer cylinder body and the tail gas in the tail gas buffering discharge jar immediately by a wide margin, improve the utilization ratio to the tail gas heat energy by a wide margin. The temperature of the air is reduced when the air is compressed, the temperature can be raised after the subsequent air compressor is pressurized, and the loss in the period is extremely low. However, in the process of reducing the pressure to a high pressure, the heat exchange rate of the gas in the heat exchange cylinder and the tail gas in the tail gas buffer exhaust tank is greatly improved. The pressure reducing valve is used for being matched with an air compressor, and air after heat exchange can be further heated into high-temperature air through air and then is pumped into the rotary furnace for use.
The invention effectively reduces the energy consumption of the rotary furnace by 3-6%, and has great significance for a large number of rotary furnaces although the energy consumption is not greatly reduced. Effectively realized promoting by a wide margin the reuse rate of the tail gas heat energy of rotary furnace, and simple structure and the advantage of manufacturing low running cost are fit for extensively promoting.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
To facilitate understanding of those skilled in the art, the structure of the present invention will now be described in further detail by way of examples in conjunction with the accompanying drawings:
referring to fig. 1, an efficient tail gas heat energy recovery device for a rotary furnace comprises a tail gas buffer discharge tank 1, a heat energy recovery mechanism 2 and an air compressor 3, wherein the tail gas buffer discharge tank 1 is vertically arranged, the bottom of the tail gas buffer tank 1 is connected to a tail gas discharge pipe of the rotary furnace (not identified) through a corresponding tail gas inlet pipe 4, a corresponding exhaust pipe 5 is arranged at the top of the tail gas buffer tank 1, the heat energy recovery mechanism 2 comprises a heat exchange gas inlet pipe 201 and a heat exchange exhaust pipe 202 which hermetically penetrate through the upper end and the lower end of the tail gas buffer tank 1, a corresponding heat exchange cylinder 203 is connected between the heat exchange gas inlet pipe 201 and the heat exchange exhaust pipe 202 in a communication manner, the diameter of the heat exchange cylinder 203 is larger than that of the heat exchange exhaust pipe 202, and the diameter of the heat; the heat exchange exhaust pipe 202 is connected to an air inlet of the air compressor 3, and an air outlet of the air compressor 3 is connected to an air inlet pipe of the rotary furnace through a corresponding pressure reducing valve 6.
The diameter ratio of the heat exchange cylinder 203 to the heat exchange exhaust pipe 202 to the heat exchange inlet pipe 201 is 6:1.5: 1.
The tail gas inlet pipe 4 is provided with a corresponding air inlet electromagnetic valve 7, and the exhaust pipe 5 is provided with a corresponding exhaust electromagnetic valve 8.
And one side of the tail gas buffer tank 1 is provided with a corresponding pressure gauge 9.
The tail gas buffer tank 1 is composed of a shell and an inner container interlayer, and a corresponding heat insulation material layer 10 is filled between the shell and the inner container.
A corresponding liquid discharge pipe 11 is communicated with the middle position of the bottom of the tail gas buffer tank 1, and a corresponding liquid discharge valve 12 is fixed on the liquid discharge pipe 11.
The tail gas buffer tank 1 is fixedly supported by a corresponding support frame 13.
The specific steps and the working principle flow of the using method of the invention are as follows:
1) the rotary furnace is started, the air compressor 3 is started, air is pressurized and heated by the air compressor 3 after passing through the heat exchange cylinder 203, and then is sent into an air inlet pipe of the rotary furnace along the pressure reducing valve 6 for use, so that the temperature of an air source is effectively increased, the heating time of the air is shortened, and the energy consumption is reduced;
2) the air inlet electromagnetic valve 7 is opened, so that tail gas generated by the rotary furnace processing effectively enters the tail gas buffer discharge tank 1 along the tail gas inlet pipe 4, the residence time of the tail gas in the tail gas buffer discharge tank 1 is effectively prolonged, the temperature of the tail gas can be increased to a certain extent along with the increase of the pressure in the tail gas buffer discharge tank 1, and the heat energy utilization rate of the tail gas is effectively improved;
3) observing a display numerical value of the pressure gauge, opening the exhaust solenoid valve 8 and performing exhaust operation when the pressure value in the tail gas buffer exhaust tank 1 reaches a certain level, continuously keeping the tail gas pressure in the tail gas buffer exhaust tank 1, and further improving the utilization rate of the heat energy of the tail gas;
4) the air compressor continuously operates, after the air continuously and effectively exchanges heat with tail gas through the heat exchange cylinder 203, the air is further pressurized and heated through the air compressor 3 and then is sent into an air inlet pipe of the rotary furnace along the pressure reducing valve 6 for use, along with the continuous operation of the air compressor 3, the air pressure in the heat exchange cylinder 203 is reduced, so that the temperature of the air is reduced, the heat exchange rate is improved, the temperature of the air is reduced during air compression, and the temperature is raised after the subsequent pressurization; the air after high-efficiency heat exchange is further pressurized and heated by the air compressor 3 to form high-temperature air, and the high-temperature air is continuously pumped into the rotary furnace for use, so that the heating time of the air is greatly shortened, and the energy consumption is reduced;
5) stopping the operation of the rotary furnace, stopping the operation of the air compressor 3, checking the display numerical value of the pressure gauge, and closing the air inlet electromagnetic valve 7 and the exhaust electromagnetic valve 8 when the pressure value in the tail gas buffer exhaust tank 1 is reduced to normal pressure;
6) the liquid discharge valve 12 is opened to discharge the liquid in the exhaust buffer tank 1.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (7)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910801591.5A CN110398157B (en) | 2019-08-28 | 2019-08-28 | Efficient tail gas heat energy recovery equipment of rotary furnace and use method thereof |
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| CN201910801591.5A CN110398157B (en) | 2019-08-28 | 2019-08-28 | Efficient tail gas heat energy recovery equipment of rotary furnace and use method thereof |
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| CN110398157A CN110398157A (en) | 2019-11-01 |
| CN110398157B true CN110398157B (en) | 2021-05-14 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4516934A (en) * | 1983-11-25 | 1985-05-14 | Owens-Illinois, Inc. | Waste heat recovery from regenerative furnaces |
| CN202118939U (en) * | 2011-06-13 | 2012-01-18 | 倪加明 | Air preheater |
| CN202993877U (en) * | 2012-12-30 | 2013-06-12 | 新疆现代石油化工股份有限公司 | Air preheating burning device |
| CN204421052U (en) * | 2014-12-04 | 2015-06-24 | 博大面业集团有限公司 | A kind of waste heat recovery furnace |
| CN205328636U (en) * | 2015-12-15 | 2016-06-22 | 重庆庆龙精细锶盐化工有限公司 | Rotary kiln waste heat recovery device |
| CN205403510U (en) * | 2016-02-22 | 2016-07-27 | 湖北雄陶陶瓷有限公司 | Kiln tail gas waste heat utilization equipment |
| CN108302954A (en) * | 2018-04-27 | 2018-07-20 | 浙江格扬热工装备科技有限公司 | One kind is rapidly heated flue gas residual heat utilization apparatus for industrial furnaces |
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Effective date of registration: 20220126 Address after: 354200 plot g2018001, economic development zone, Xushi Town, Jianyang District, Nanping City, Fujian Province Patentee after: Fujian Nanping Fuhong New Material Co.,Ltd. Address before: 354200 Room 501, block 1, Songci Road, Tongyou, Jianyang City, Nanping City, Fujian Province Patentee before: Xie Wenzui |
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