WO2005022063A1 - A multi-stage exhaust heat recovery apparatus for flue gases in flue - Google Patents

A multi-stage exhaust heat recovery apparatus for flue gases in flue Download PDF

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Publication number
WO2005022063A1
WO2005022063A1 PCT/CN2004/000976 CN2004000976W WO2005022063A1 WO 2005022063 A1 WO2005022063 A1 WO 2005022063A1 CN 2004000976 W CN2004000976 W CN 2004000976W WO 2005022063 A1 WO2005022063 A1 WO 2005022063A1
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Prior art keywords
flue
heat recovery
recovery device
waste heat
water
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PCT/CN2004/000976
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French (fr)
Chinese (zh)
Inventor
Guoxiong Xiao
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Guoxiong Xiao
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Publication of WO2005022063A1 publication Critical patent/WO2005022063A1/en

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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
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage
    • 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
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Definitions

  • the invention relates to a latent heat and sensible heat waste heat recovery device for flue gas flue gas, in particular to a multi-stage waste heat recovery device for flue gas.
  • the flue waste heat recovery device with the patent number 02223946. 4 mainly recovers the sensible heat of the flue gas. To recover the latent heat, the investment is large and the occupied space is large.
  • a waste heat recovery device that is equipped with a sprayer at the top of a vertical chimney. The lower end of the sprayer is provided with several deflectors that are staggered with each other. A water curtain is formed on the deflector opening.
  • the technical problem to be solved by the present invention is to provide a multi-stage waste heat recovery device for flue gas in response to the above-mentioned defects in the prior art, save energy, reduce exhaust emissions, protect the environment, and improve the thermal efficiency of exhaust gas heating equipment. Reduce waste heat recovery costs and increase equipment life.
  • the flue gas multi-stage waste heat recovery device includes a waste heat recovery device, a heat exchanger, and a second-stage or higher-stage waste heat recovery device is installed in a horizontal flue, or in a vertical flue. Set up a level and a horizontal flue. Set a level one or more waste heat recovery device.
  • the heat exchanger is set outside the flue.
  • the waste heat recovery device includes a sprayer, a water tank, a pump and a flue.
  • the sprayer is installed at the upper end of the flue.
  • a baffle plate is provided in the joint part of the adjacent waste heat recovery device.
  • the water outlet pipe of the first-stage waste heat recovery device is connected to the sprayer of the second-stage waste heat recovery device through a water pump, and serves as the water inlet pipe of the second-stage water tank.
  • the levels are connected in turn, and the water outlet pipe of the final water tank is connected to the heat exchanger water inlet pipe.
  • the above-mentioned multi-stage waste heat recoverer is used in the horizontal flue, or one stage or more is installed in the vertical flue and the horizontal flue, the first stage
  • the recovered low-temperature water is continuously heated by the waste heat recoverers such as the second and third stages, and finally it can be heated to high temperature hot water of 90 ° C.
  • Figure 1 is a schematic diagram of a device using a four-stage waste heat recovery device in a horizontal flue.
  • Figure 2 is a schematic diagram of a device for setting a first-stage waste heat recovery device and a third-stage waste heat recovery device in a vertical flue.
  • the flue gas waste heat recovery device is composed of four waste heat recovery devices including a sprayer 1, an inlet pipe 2, an outlet pipe 3, a water tank 4, a water pump 5, an overflow pipe 6, and a heat exchanger 7,
  • the heat exchanger inlet and outlet water pipes 8, 9, the flue 10 and the baffle plate 11 are composed.
  • the sprayer 1 is made of a metal pipe and has a plurality of small-hole spraying devices, which are installed at the upper end of the horizontal flue 10.
  • a water barrier 11 is arranged in the flue joint of the adjacent waste heat recovery device to prevent the water in the flue of the adjacent waste heat recovery device from flowing to each other.
  • the sprayer 1 of the first-stage waste heat recovery device is connected to the water inlet pipe 2, and the water inlet pipe 2 is connected to the water pump.
  • the water pump 5 is connected to the water tank 4, and the water tank 4 is installed with an overflow pipe 6.
  • the fifth end of the water pump is connected to the water tank 4, and the other end is connected to the water inlet pipe 2 of the sprayer of the second-stage waste heat recovery device.
  • the above structure is repeated four times.
  • the water pump 5 is connected to the heat exchanger 7, and the heat exchanger 7 is connected to the outlet end of the flue, that is, the inlet pipe 2 of the sprayer 1 of the first-stage waste heat recovery device.
  • the water inlet pipe 9 and the water outlet pipe 8 of the heat exchanger are respectively connected to the water inlet and outlet pipes of the water to be heated.
  • the process of obtaining hot water with high thermal quality is: At the outlet end of the flue 10, after the water is cooled by the heat exchanger 7, it passes through the inlet pipe 2 of the first-stage waste heat recovery unit (N1) and is pumped into the flue 10 from the sprayer. 1 Spray and atomize, mix with the second-stage waste heat recoverer (N2). The exhausted water vapor has been cooled to about 80 Torr and mixed with water vapor. After the water absorbs heat, it flows out from the water outlet pipe 3, enters the water tank 4, and passes through the water pump 5 Pump into the second-stage waste heat recovery device (N2) for the second heating and heating, and then enter the third-stage waste heat recovery device (N3) for the third heating and heating.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

This invention discloses an apparatus in which multi stages exhaust heat recovery devices are provided in horizontal flue, or one stage exhaust heat recovery device is provided in vertical flue and one or more stages exhaust heat recovery devices are provided in horizontal flue. The apparatus comprises exhaust heat recovery devices and heat exchanger. The exhaust heat recovery device comprises sprayer, water tank, pump and flue. The sprayer is installed on the top inside the flue, and the water tank is installed at the bottom outside the flue; a partition plate is installed at the joint of the adjacent flues; the water outlet tube of the water tank of the first stage exhaust heat recovery device is connected with the sprayer of the second stage exhaust heat recovery device through the pump. Those stages are connected sequentially. The water outlet tube of the last stage water tank is connected with the water inlet tube of the heat exchanger. Thus, the hot water of 90*C can be obtained. By doing so, the thermal efficiency of the heat supply device is increased; energy is saved; the discharge amount of the waste gases is reduced; the environment is protected; the recovery cost is decreased; and the using life of the device is prolonged.

Description

一种烟道烟气多级余热回收装置  Multistage waste heat recovery device for flue gas
技术领域 Technical field
本发明涉及一种烟道烟气冷凝水潜热和显热余热回收装置，具体指 一种烟道烟气多级余热回收装置。  The invention relates to a latent heat and sensible heat waste heat recovery device for flue gas flue gas, in particular to a multi-stage waste heat recovery device for flue gas.
技术背景 technical background
在锅炉和溴化锂中央空调及窑炉的烟道的高温烟气带走了约  The high temperature flue gas in the flue of the boiler and lithium bromide central air-conditioning and kiln took away about
15— 25%的热量， 浪费了能源， 污染了空气。 专利号为 02223946. 4的 烟道余热回收装置主要回收烟气的显热， 如要回收潜热， 投资大， 占领 空间大。 在欧洲， 有一种余热回收器， 是在垂直的烟囱顶端装有一个喷 雾器。喷雾器下端设有几块彼此错开的挡水板，在挡水板口上形成水幕， 存在着下列缺点： 一是水不能多级加热， 大都在 50°C左右： . 二是产生 烟气阻力， 而需要增加引风机。  15-25% of the heat is wasting energy and polluting the air. The flue waste heat recovery device with the patent number 02223946. 4 mainly recovers the sensible heat of the flue gas. To recover the latent heat, the investment is large and the occupied space is large. In Europe, there is a waste heat recovery device that is equipped with a sprayer at the top of a vertical chimney. The lower end of the sprayer is provided with several deflectors that are staggered with each other. A water curtain is formed on the deflector opening. There are the following disadvantages: First, the water cannot be heated in multiple stages, most of which are at about 50 ° C. Second, the smoke resistance is generated. It is necessary to increase the induced draft fan.
发明内容 Summary of the invention
本发明所要解决的技术问题是针对现有技术中存在的上述缺陷，提 供一种烟道烟气多级余热回收装置， 节约能源， 减少废气的排放， 保护 环境， 提高废气供热设备的热效率， 降低余热回收成本， 提高设备的使 用寿命。  The technical problem to be solved by the present invention is to provide a multi-stage waste heat recovery device for flue gas in response to the above-mentioned defects in the prior art, save energy, reduce exhaust emissions, protect the environment, and improve the thermal efficiency of exhaust gas heating equipment. Reduce waste heat recovery costs and increase equipment life.
解决本发明技术问题所采用的技术方案是该烟道烟气多级余热回 收装置包括余热回收器， 热交换器， 在水平烟道设置二级及二级以上余 热回收器，或在垂直烟道设置一级和水平烟道设置一级及一级以上的余 热回收器， 热交换器设置在烟道外， 余热回收器包括喷雾器、 水箱、 水 泵和烟道， 喷雾器装在烟道内的上端. 水箱装在烟道外的下端， 相邻余 热回收器烟道接合部内设置隔水板，第一级余热回收器的水箱出水管经 过水泵连接第二级余热回收器的喷雾器， 作为第二级水箱的进水管， 各 级依次连接， 最后一级水箱的出水管与热交换器进水管连接。  The technical solution adopted to solve the technical problem of the present invention is that the flue gas multi-stage waste heat recovery device includes a waste heat recovery device, a heat exchanger, and a second-stage or higher-stage waste heat recovery device is installed in a horizontal flue, or in a vertical flue. Set up a level and a horizontal flue. Set a level one or more waste heat recovery device. The heat exchanger is set outside the flue. The waste heat recovery device includes a sprayer, a water tank, a pump and a flue. The sprayer is installed at the upper end of the flue. At the lower end outside the flue, a baffle plate is provided in the joint part of the adjacent waste heat recovery device. The water outlet pipe of the first-stage waste heat recovery device is connected to the sprayer of the second-stage waste heat recovery device through a water pump, and serves as the water inlet pipe of the second-stage water tank. The levels are connected in turn, and the water outlet pipe of the final water tank is connected to the heat exchanger water inlet pipe.
由于， 在水平烟道内采用了上述多级余热回收器， 或在垂直烟道内 设置一级和水平烟道内设置一级及一级以上的余热回收器，使得第一级 回收的低温水， 经第二级、第三级等的余热回收器继续加热， 最后可加 热到 90°C的高温热水。 没有错开挡水扳， 对烟气不会产生阻力。 Because the above-mentioned multi-stage waste heat recoverer is used in the horizontal flue, or one stage or more is installed in the vertical flue and the horizontal flue, the first stage The recovered low-temperature water is continuously heated by the waste heat recoverers such as the second and third stages, and finally it can be heated to high temperature hot water of 90 ° C. There is no stagger of the water retaining plate, and there is no resistance to the smoke.
附图说明 BRIEF DESCRIPTION OF THE DRAWINGS
下面结合附图对本发明作进一步说明。  The invention is further described below with reference to the drawings.
图 1 为在水平烟道内采用了四级余热回收器的装置示意图。  Figure 1 is a schematic diagram of a device using a four-stage waste heat recovery device in a horizontal flue.
图 2 为在垂直烟道内设置一级和水平烟道内设置三级的余热回收 器的装置示意图  Figure 2 is a schematic diagram of a device for setting a first-stage waste heat recovery device and a third-stage waste heat recovery device in a vertical flue.
图中： 1一喷雾器、 2—进水管、 3—出水管、 4一水箱、 5水泵、 6溢 流管、 7—换热器、 8—换热器出水管、 9一换热器进水管、 10—烟道、 11一隔水板  In the picture: 1 sprayer, 2—inlet pipe, 3—outlet pipe, 4—water tank, 5 water pump, 6 overflow pipe, 7—heat exchanger, 8—heat exchanger water outlet pipe, 9—heat exchanger water inlet pipe 10, flue, 11 a baffle
具体实施方式- 参考图， 该烟道烟气余热回收装置是四个由喷雾器 1、 进水管 2、 出 水管 3、 水箱 4、 水泵 5、 溢流管 6等余热回收器加换热器 7、 换热器进出 水管 8、 9、 烟道 10和隔水板 11等组成。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS-Referring to the figure, the flue gas waste heat recovery device is composed of four waste heat recovery devices including a sprayer 1, an inlet pipe 2, an outlet pipe 3, a water tank 4, a water pump 5, an overflow pipe 6, and a heat exchanger 7, The heat exchanger inlet and outlet water pipes 8, 9, the flue 10 and the baffle plate 11 are composed.
喷雾器 1是由金属管制成， 上有许多小孔喷雾装置， 安装在水平烟 道 10上端。相邻余热回收器的烟道接合部内设置隔水板 11， 防止相邻余 热回收器的烟道内的水相互流动. 第一级余热回收器的喷雾器 1与进水 管 2相连， 进水管 2与水泵 5相连， 水泵 5与水箱 4相连， 水箱 4安装有溢流 管 6。 水泵 5—端与水箱 4相连， 另一端与第二级余热回收器的喷雾器的 进水管 2相连。上述结构重复四次后. 靠近烟道的进口端， 水泵 5与换热 器 7相连， 换热器 7与烟道的出口端， 即第一级余热回收器的喷雾器 1的 进水管 2相连。 换热器进水管 9、 出水管 8分别连接需加热的水的进出水 管。  The sprayer 1 is made of a metal pipe and has a plurality of small-hole spraying devices, which are installed at the upper end of the horizontal flue 10. A water barrier 11 is arranged in the flue joint of the adjacent waste heat recovery device to prevent the water in the flue of the adjacent waste heat recovery device from flowing to each other. The sprayer 1 of the first-stage waste heat recovery device is connected to the water inlet pipe 2, and the water inlet pipe 2 is connected to the water pump. The water pump 5 is connected to the water tank 4, and the water tank 4 is installed with an overflow pipe 6. The fifth end of the water pump is connected to the water tank 4, and the other end is connected to the water inlet pipe 2 of the sprayer of the second-stage waste heat recovery device. The above structure is repeated four times. Near the inlet end of the flue, the water pump 5 is connected to the heat exchanger 7, and the heat exchanger 7 is connected to the outlet end of the flue, that is, the inlet pipe 2 of the sprayer 1 of the first-stage waste heat recovery device. The water inlet pipe 9 and the water outlet pipe 8 of the heat exchanger are respectively connected to the water inlet and outlet pipes of the water to be heated.
含热品质高的热水获得的过程是： 在烟道 10出口端， 水被热交换器 7冷却后， 通过第一级余热回收器 (N1)的进水管 2、泵入烟道 10从喷雾器 1喷出雾化， 与第二级余热回收器 (N2).排出的己被冷却到约 80Ό的含水 蒸汽烟气混合， 水吸收热量后从出水管 3流出， 进入水箱 4， 再通过水泵 5泵入第二级余热回收器 (N2)进行第二次加热升温， 再进入第三级余热 回收器 (N3)进行第三次加热升温. 到末端， 即靠近烟道 10进口处的第四 级余热回收器 (N4)。 这时， 从出水管 3流出的水温较高， 约 90°C， 再通 过水管 5泵入热交换器 7进入热交换， 低温水返回到第一级余热回收器 (Nl)。 这样， 可获得含热品质更高、 约 90Ό的热水。 后三级余热回收器 (N2) (N3) (N4)的主要作用是将第一级余热回收器 (N1)的热水进行继续 加热升温。 The process of obtaining hot water with high thermal quality is: At the outlet end of the flue 10, after the water is cooled by the heat exchanger 7, it passes through the inlet pipe 2 of the first-stage waste heat recovery unit (N1) and is pumped into the flue 10 from the sprayer. 1 Spray and atomize, mix with the second-stage waste heat recoverer (N2). The exhausted water vapor has been cooled to about 80 Torr and mixed with water vapor. After the water absorbs heat, it flows out from the water outlet pipe 3, enters the water tank 4, and passes through the water pump 5 Pump into the second-stage waste heat recovery device (N2) for the second heating and heating, and then enter the third-stage waste heat recovery device (N3) for the third heating and heating. To the end, that is, the fourth near the inlet of the flue 10 Stage waste heat recoverer (N4). At this time, the temperature of the water flowing out of the water outlet pipe 3 is high, about 90 ° C, and then pumped into the heat exchanger 7 through the water pipe 5 to enter the heat exchange, and the low-temperature water is returned to the first-stage waste heat recovery device (Nl). In this way, hot water with a higher thermal quality of about 90 F can be obtained. The main function of the last three stages of waste heat recoverers (N2) (N3) (N4) is to continue heating and warming up the hot water of the first stage of waste heat recoverers (N1).

Claims

权 利 要 求 Rights request
1、一种烟道烟气多级余热回收装置，包括余热回收器，热交换器， 其特征是： 在水平烟道设置二级及二级以上余热回收器， 或在垂直烟 道设置一级和水平烟道设置一级及一级以上的余热回收器，热交换器 设置在烟道外， 余热回收器包括喷雾器、 水箱、 水泵和烟道， 喷雾器 装在烟道内的上端. 水箱装在烟道外的下端， 相邻余热回收器烟道接 合部内设置隔水板，第一级余热回收器的水箱出水管经过水泵连接第 二级余热回收器的喷雾器，作为第二级水箱的进水管，各级依次连接， 最后一级水箱的出水管与热交换器进水管连接。  1. A multi-stage waste heat recovery device for flue gas, including a waste heat recovery device and a heat exchanger, which is characterized by: setting a level two or more waste heat recovery device in a horizontal flue or a level one in a vertical flue A horizontal and upper flue is provided with a waste heat recoverer of one or more levels, and a heat exchanger is arranged outside the flue. The waste heat recoverer includes a sprayer, a water tank, a pump and a flue. The sprayer is installed at the upper end of the flue. The water tank is installed outside the flue At the lower end, a baffle is installed in the junction of the adjacent waste heat recovery device, and the water outlet pipe of the first-stage waste heat recovery device is connected to the sprayer of the second-stage waste heat recovery device through a water pump as the inlet pipe of the second-stage water tank. Connected in sequence, the water outlet pipe of the last stage water tank is connected to the heat exchanger water inlet pipe.
2,、稂据权利要求 1所述的烟道烟气多级余热回收装置，其特征是： 水箱安装有溢流管。  2. The multistage waste heat recovery device for flue gas according to claim 1, wherein the water tank is provided with an overflow pipe.
PCT/CN2004/000976 2003-09-02 2004-08-23 A multi-stage exhaust heat recovery apparatus for flue gases in flue WO2005022063A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03124787.3 2003-09-02
CNB031247873A CN1293356C (en) 2003-09-02 2003-09-02 Equipment for recovering multistaged waste heat of gas in flue

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WO2005022063A1 true WO2005022063A1 (en) 2005-03-10

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