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CN205065770U - Flue gas waste heat recovery device - Google Patents

Flue gas waste heat recovery device Download PDF

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Publication number
CN205065770U
CN205065770U CN201520811591.0U CN201520811591U CN205065770U CN 205065770 U CN205065770 U CN 205065770U CN 201520811591 U CN201520811591 U CN 201520811591U CN 205065770 U CN205065770 U CN 205065770U
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pipe
flue gas
heat
water
boiler
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CN201520811591.0U
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Chinese (zh)
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张群力
张秋月
曹明凯
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Beijing University of Civil Engineering and Architecture
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Beijing University of Civil Engineering and Architecture
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

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Abstract

本实用新型涉及烟气回收技术领域,公开了烟气余热回收装置,包括依次相连的锅炉、间接式换热单元、直接式换热单元及吸收式热泵,所述吸收式热泵分别通过供热水管支管及供热水管与所述锅炉连接,所述间接式换热单元上设置有补水管及驱动热源管,所述驱动热源管与所述供热水管支管连接;所述直接式换热单元上设置有注水管及喷淋出水管,所述直接式换热单元通过管网与所述吸收式热泵连接,所述锅炉与所述吸收式热泵之间设置有锅炉回水管,所述供热水管支管通过驱动热源回水管与所述锅炉回水管连接,所述锅炉回水管与水源连通。本实用新型提供的烟气余热回收装置通过间接式换热单元进行烟气的显然回收,再通过直接式换热单元对烟气的潜热进行回收。

The utility model relates to the technical field of flue gas recovery, and discloses a flue gas waste heat recovery device, which comprises sequentially connected boilers, indirect heat exchange units, direct heat exchange units and absorption heat pumps, and the absorption heat pumps respectively pass through hot water supply pipes. The branch pipe and the hot water supply pipe are connected to the boiler, and the indirect heat exchange unit is provided with a water supply pipe and a driving heat source pipe, and the driving heat source pipe is connected to the branch pipe of the hot water supply pipe; A water injection pipe and a spray outlet pipe are provided, the direct heat exchange unit is connected to the absorption heat pump through a pipe network, a boiler return pipe is provided between the boiler and the absorption heat pump, and the hot water supply pipe The branch pipe is connected to the boiler return pipe through the drive heat source return pipe, and the boiler return pipe is connected to the water source. The flue gas waste heat recovery device provided by the utility model performs obvious recovery of the flue gas through the indirect heat exchange unit, and then recovers the latent heat of the flue gas through the direct heat exchange unit.

Description

一种烟气余热回收装置A flue gas waste heat recovery device

技术领域technical field

本实用新型涉及烟气回收技术领域,特别是涉及一种烟气余热回收装置,具体的是一种能够深度回收余热且同时净化烟气的烟气余热回收装置。The utility model relates to the technical field of flue gas recovery, in particular to a flue gas waste heat recovery device, in particular to a flue gas waste heat recovery device capable of deeply recovering waste heat and purifying flue gas at the same time.

背景技术Background technique

天然气的主要成份是甲烷,燃烧后的产物含有大量水蒸气,高温水蒸气中同时具有显热和潜热,未经余热回收直接排放到大气中会造成能源浪费和环境污染。为减少能源的浪费,烟气排出前多会进入余热回收装置进行能源的回收利用。The main component of natural gas is methane, and the product after combustion contains a large amount of water vapor. The high-temperature water vapor has both sensible heat and latent heat. It will cause energy waste and environmental pollution if it is directly discharged into the atmosphere without waste heat recovery. In order to reduce the waste of energy, the flue gas usually enters the waste heat recovery device for energy recovery and utilization before being discharged.

现有的余热回收装置多为间接接触式余热回收,这种余热回收形式虽无介质的交叉污染,但低温烟气传热温差小,传热系数较低,烟道阻力大,从而导致系统过大,造价高,余热回收后的烟气仍具有较高的温度,这种方法无法保证烟气的显热和潜热都被完全吸收;直接接触式烟气余热回收换热系数大,烟道阻力小,但是烟气和水直接接触后水会呈酸性而不能直接使用。Most of the existing waste heat recovery devices are indirect contact waste heat recovery. Although there is no cross-contamination of the medium in this form of waste heat recovery, the heat transfer temperature difference of low-temperature flue gas is small, the heat transfer coefficient is low, and the flue resistance is large, which leads to system overheating. Large, high cost, and the flue gas after waste heat recovery still has a high temperature, this method cannot guarantee that the sensible heat and latent heat of the flue gas are completely absorbed; the heat transfer coefficient of the direct contact flue gas waste heat recovery is large, and the flue resistance Small, but the water will be acidic after direct contact between the flue gas and water and cannot be used directly.

实用新型内容Utility model content

(一)要解决的技术问题(1) Technical problems to be solved

本实用新型要解决的技术问题是现有的余热回收装置多为间接接触式余热回收,这种余热回收形式虽无介质的交叉污染,但低温烟气传热温差小,传热系数较低,烟道阻力大,从而导致系统过大,造价高,余热回收后的烟气仍具有较高的温度,这种方法无法保证烟气的显热和潜热都被完全吸收;直接接触式烟气余热回收换热系数大,烟道阻力小,但是烟气和水直接接触后水会呈酸性而不能直接使用的问题。The technical problem to be solved by the utility model is that most of the existing waste heat recovery devices are indirect contact waste heat recovery. Although this waste heat recovery form has no cross-contamination of the medium, the heat transfer temperature difference of the low-temperature flue gas is small, and the heat transfer coefficient is low. The resistance of the flue is large, which leads to an oversized system and high cost. The flue gas after waste heat recovery still has a high temperature. This method cannot guarantee that both the sensible heat and the latent heat of the flue gas are completely absorbed; the direct contact flue gas waste heat The recovery heat transfer coefficient is large and the flue resistance is small, but the water will be acidic after the flue gas and water are in direct contact and cannot be used directly.

(二)技术方案(2) Technical solution

为了解决上述技术问题,本实用新型提供了一种烟气余热回收装置,其包括依次相连的锅炉、间接式换热单元、直接式换热单元及吸收式热泵,所述吸收式热泵分别通过供热水管支管及供热水管与所述锅炉连接,所述间接式换热单元上设置有补水管及驱动热源管,所述驱动热源管与所述供热水管支管连接;所述直接式换热单元上设置有注水管及喷淋出水管,所述直接式换热单元通过管网与所述吸收式热泵连接,所述锅炉与所述吸收式热泵之间设置有锅炉回水管,所述供热水管支管通过驱动热源回水管与所述锅炉回水管连接,所述锅炉回水管与水源连通。In order to solve the above-mentioned technical problems, the utility model provides a flue gas waste heat recovery device, which includes sequentially connected boilers, indirect heat exchange units, direct heat exchange units, and absorption heat pumps, and the absorption heat pumps are respectively supplied by The hot water pipe branch and the hot water supply pipe are connected to the boiler, the indirect heat exchange unit is provided with a water supply pipe and a driving heat source pipe, and the driving heat source pipe is connected to the hot water supply pipe branch; the direct heat exchange unit The unit is provided with a water injection pipe and a spray outlet pipe, the direct heat exchange unit is connected to the absorption heat pump through a pipe network, a boiler return pipe is provided between the boiler and the absorption heat pump, and the supply The branch pipe of the hot water pipe is connected to the boiler return pipe by driving the heat source return pipe, and the boiler return pipe is communicated with the water source.

优选地,所述间接式换热单元包括通过烟道与所述锅炉连通的密封体,所述密封体内设置有与所述烟道连通的烟道管束。Preferably, the indirect heat exchange unit includes a sealing body communicating with the boiler through a flue, and a flue tube bundle communicating with the flue is arranged in the sealing body.

优选地,所述补水管设置于所述密封体的底部,所述驱动热源管设置于所述密封体的顶部。Preferably, the water supply pipe is arranged at the bottom of the sealing body, and the driving heat source pipe is arranged at the top of the sealing body.

优选地,还包括设置于所述补水管与所述驱动热源管之间的生活热水管。Preferably, it also includes a domestic hot water pipe arranged between the water supply pipe and the driving heat source pipe.

优选地,所述密封体包括第一密封体、第二密封体及交换给水管,所述补水管设置于第二密封体的底部,所述生活热水管设置于所述第二密封体的顶部,所述交换给水管设置于所述第一密封体的底部,所述驱动热源管设置于所述第一密封体的顶部,所述交换给水管与所述生活热水管连通。Preferably, the sealing body includes a first sealing body, a second sealing body and an exchange water supply pipe, the water supply pipe is arranged at the bottom of the second sealing body, and the domestic hot water pipe is arranged at the bottom of the second sealing body At the top, the exchange water supply pipe is arranged at the bottom of the first sealing body, the driving heat source pipe is arranged at the top of the first sealing body, and the exchange water supply pipe communicates with the domestic hot water pipe.

优选地,所述烟道管束内设置有导流装置。Preferably, a flow guiding device is arranged in the flue tube bundle.

优选地,所述直接式换热单元包括与所述烟道管束连通的主塔体,所述主塔体内设置有喷淋器及蓄水池,所述注水管及喷淋出水管均与所述蓄水池连接。Preferably, the direct heat exchange unit includes a main tower body connected to the flue tube bundle, a sprinkler and a water storage tank are arranged in the main tower body, and the water injection pipe and the spray outlet pipe are connected to the connection to the reservoir.

优选地,所述喷淋出水管与所述喷淋器连通,所述喷淋出水管上设置有净化箱。Preferably, the spray outlet pipe is in communication with the shower, and a purification box is arranged on the spray outlet pipe.

优选地,所述管网包括均与所述蓄水池连接的低温供水管及低温回水管。Preferably, the pipe network includes a low-temperature water supply pipe and a low-temperature return water pipe both connected to the reservoir.

优选地,所述主塔体上设置有排烟管,所述排烟管上设置有除雾器。Preferably, a smoke exhaust pipe is arranged on the main tower body, and a mist eliminator is arranged on the smoke exhaust pipe.

(三)有益效果(3) Beneficial effects

本实用新型的上述技术方案具有如下优点:本实用新型提供的烟气余热回收装置中的吸收式热泵分别通过供热水管支管及供热水管与锅炉连接,间接式换热单元上设置有补水管及驱动热源管,驱动热源管与供热水管支管连接;直接式换热单元上设置有注水管及喷淋出水管,直接式换热单元通过管网与吸收式热泵连接,锅炉与吸收式热泵之间设置有锅炉回水管,供热水管支管通过驱动热源回水管与锅炉回水管连接,锅炉回水管与水源连通。本实用新型提供的烟气余热回收装置通过间接式换热单元进行烟气的显然回收,再通过直接式换热单元对烟气的潜热进行回收,回收到的热量用于采暖热水和加热锅炉的给水,提高了烟气的利用率,可达到回收烟气冷凝余热和净化烟气的双重目的;具有结构简单、操作方便等优点。The above-mentioned technical solution of the utility model has the following advantages: the absorption heat pump in the flue gas waste heat recovery device provided by the utility model is respectively connected to the boiler through the branch pipe of the water supply pipe and the water supply pipe, and the indirect heat exchange unit is provided with a water supply pipe And the driving heat source pipe, the driving heat source pipe is connected with the branch pipe of the hot water supply pipe; the direct heat exchange unit is equipped with a water injection pipe and a spray outlet pipe, and the direct heat exchange unit is connected to the absorption heat pump through the pipe network, and the boiler is connected to the absorption heat pump. A boiler return pipe is arranged between them, and the branch pipe of the hot water supply pipe is connected to the boiler return pipe by driving the heat source return pipe, and the boiler return pipe is connected to the water source. The flue gas waste heat recovery device provided by the utility model performs obvious recovery of the flue gas through the indirect heat exchange unit, and then recovers the latent heat of the flue gas through the direct heat exchange unit, and the recovered heat is used for heating hot water and heating boilers The water supply improves the utilization rate of the flue gas, and can achieve the dual purposes of recovering the waste heat of the condensation of the flue gas and purifying the flue gas; it has the advantages of simple structure and convenient operation.

附图说明Description of drawings

图1是本实用新型实施例的烟气余热回收装置的结构示意图;Fig. 1 is a schematic structural view of a flue gas waste heat recovery device according to an embodiment of the present invention;

图2是本实用新型实施例的烟气余热回收装置中A-A的剖视图。Fig. 2 is a cross-sectional view of A-A in the flue gas waste heat recovery device of the embodiment of the utility model.

图中:1:锅炉;2:烟道;3:一级热交换段;4:二级热交换段;5:密封介质;6:烟道管束;7:导流装置;8:喷淋器;9:填料层;10:蓄水池;11:除雾器;12:风机;13:净化箱;14:吸收式热泵;21:补水管;22:生活热水管;23:交换给水管;24:驱动热源管;25:溢水管;26:注水管;27:喷淋出水管;28:低温供水管;29:低温回水管;30:供热水管支管:31:热水回水管;32:锅炉回水管;33:第一阀门;34:第二阀门;35:供热水管;36:驱动热源回水管。In the figure: 1: boiler; 2: flue; 3: primary heat exchange section; 4: secondary heat exchange section; 5: sealing medium; 6: flue tube bundle; 7: flow guide device; 8: sprayer ;9: Packing layer; 10: Reservoir; 11: Demister; 12: Fan; 13: Purification box; 14: Absorption heat pump; 21: Water supply pipe; 22: Domestic hot water pipe; 23: Exchange water supply pipe ;24: Drive heat source pipe; 25: Overflow pipe; 26: Water injection pipe; 27: Spray outlet pipe; 28: Low temperature water supply pipe; 29: Low temperature return water pipe; 32: boiler return pipe; 33: first valve; 34: second valve; 35: hot water supply pipe; 36: drive heat source return pipe.

具体实施方式detailed description

在本实用新型的描述中,除非另有说明,“多个”的含义是两个或两个以上;术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本实用新型和简化描述,而不是指示或暗示所指的机或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本实用新型的限制。In the description of the present utility model, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" The orientation or positional relationship indicated by ", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the machine or element referred to must have a specific orientation, so as to Specific orientation configurations and operations, therefore, should not be construed as limitations on the invention.

在本实用新型的描述中,需要说明的是,除非另有明确的规定和限定,术语“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本实用新型中的具体含义。In the description of the present utility model, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integratively connected; it can be mechanically or electrically connected; it can be directly connected or indirectly connected through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

下面结合附图和实施例,对本实用新型的具体实施方式作进一步详细描述。以下实施例用于说明本实用新型,但不用来限制本实用新型的范围。Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

如图1所示,本实用新型实施例提供的烟气余热回收装置,其包括依次相连的锅炉1、间接式换热单元、直接式换热单元及吸收式热泵14,所述吸收式热泵14分别通过供热水管支管30及供热水管35与所述锅炉1连接,所述间接式换热单元上设置有补水管21及驱动热源管24,所述驱动热源管24与所述供热水管支管30连接,共同作为吸收式热泵14的驱动热源,驱动热源高温热水做完功后得到降温,降温后经过驱动热源回水管36进入到锅炉回水管中继续被加热;所述直接式换热单元上设置有注水管26及喷淋出水管27,所述直接式换热单元通过管网与所述吸收式热泵14连接,所述锅炉1与所述吸收式热泵14之间设置有锅炉回水管32,所述供热水管支管30通过驱动热源回水管36与所述锅炉回水管32连接,所述锅炉回水管32与水源连通。水源即经过热水回水管31供给热用户的水,水源通的水经吸收式热泵14与直接式换热单元的热水在吸收式热泵14内做功换热后,该热量用于预热热水回水管31中的热水,经过预热的热水经过锅炉回水管32进入到锅炉1内再被加热,达到供热温度后,经过供热水管35供给热用户。As shown in Figure 1, the flue gas waste heat recovery device provided by the embodiment of the utility model includes a boiler 1 connected in sequence, an indirect heat exchange unit, a direct heat exchange unit, and an absorption heat pump 14, and the absorption heat pump 14 The boiler 1 is connected to the boiler 1 through the hot water supply pipe branch pipe 30 and the hot water supply pipe 35 respectively, and the indirect heat exchange unit is provided with a replenishing water pipe 21 and a driving heat source pipe 24, and the driving heat source pipe 24 is connected to the hot water supply pipe The branch pipes 30 are connected together as the driving heat source of the absorption heat pump 14. The high-temperature hot water of the driving heat source is cooled after the work is done. After cooling, it enters the boiler return pipe through the driving heat source return pipe 36 and continues to be heated; The unit is provided with a water injection pipe 26 and a spray outlet pipe 27. The direct heat exchange unit is connected to the absorption heat pump 14 through a pipe network, and a boiler return unit is provided between the boiler 1 and the absorption heat pump 14. The water pipe 32, the branch pipe 30 of the hot water supply pipe is connected to the boiler return pipe 32 by driving the heat source return pipe 36, and the boiler return pipe 32 communicates with the water source. The water source is the water supplied to the heating user through the hot water return pipe 31. The water passing through the water source passes through the absorption heat pump 14 and the hot water of the direct heat exchange unit performs work and heat exchange in the absorption heat pump 14, and the heat is used for preheating. The hot water in the water return pipe 31 enters the boiler 1 through the boiler return pipe 32 through the preheated hot water and is heated again. After reaching the heating temperature, it is supplied to the heat user through the hot water supply pipe 35 .

驱动热源管24与锅炉1的供热水管支管30连接,共同作为吸收式热泵14的驱动热源。The driving heat source pipe 24 is connected to the branch pipe 30 of the hot water supply pipe of the boiler 1 and serves as the driving heat source of the absorption heat pump 14 together.

供给热用户的热水经过热水回水管31后,先经过所述吸收式热泵14进行预热,再与驱动热源回水管36中的热水混合后,经过锅炉回水管32进入所述锅炉1,经过锅炉1加热后,经过供热水管35将热水供给用户使用,其中一部分热水经过供热水管支管30用于驱动吸收式热泵14做功,从低温供水管28中提取热量,用于预热热水回水管31中的热水。After passing through the hot water return pipe 31, the hot water supplied to the heat users first passes through the absorption heat pump 14 for preheating, and then mixes with the hot water in the driving heat source return pipe 36, and then enters the boiler 1 through the boiler return pipe 32. After being heated by the boiler 1, the hot water is supplied to the user through the hot water supply pipe 35, and part of the hot water is used to drive the absorption heat pump 14 to do work through the hot water supply pipe branch pipe 30, and extract heat from the low temperature water supply pipe 28 for pre-heating. The hot water in the hot water return pipe 31.

本实用新型提供的烟气余热回收装置中锅炉1燃烧后的烟气通过烟道2进入间接式换热单元,补水管21通入水与烟气在间接式换热单元换热后可作为吸收式热泵14的驱动热源,经过驱动热源管24用于驱动吸收式热泵14。经间接式换热单元换热后烟气的显热被回收,带有潜热的烟气进入直接式换热单元内,注水管26内通有水,经过直接式换热单元换热后从喷淋出水管27排出,对烟气的潜热进行回收。直接式换热单元通过管网与吸收式热泵连接,水源通入水经吸收式热泵14与直接式换热单元的热水在吸收式热泵14内做功换热后,该热量用于预热热水回水管31中的热水,经过预热的热水经过锅炉回水管32进入到锅炉1内再被加热,达到供热温度后,经过供热水管35供给热用户。被加热的水从锅炉回水管32进入锅炉1内。In the flue gas waste heat recovery device provided by the utility model, the flue gas after the combustion of the boiler 1 enters the indirect heat exchange unit through the flue 2, and the water supply pipe 21 is passed into the water and the flue gas can be used as an absorption type after heat exchange in the indirect heat exchange unit. The driving heat source of the heat pump 14 is used to drive the absorption heat pump 14 through the driving heat source pipe 24 . After heat exchange by the indirect heat exchange unit, the sensible heat of the flue gas is recovered, and the flue gas with latent heat enters the direct heat exchange unit, and water is passed through the water injection pipe 26. The leaching water pipe 27 is discharged, and the latent heat of the flue gas is recovered. The direct heat exchange unit is connected to the absorption heat pump through the pipe network, the water source passes through the absorption heat pump 14 and the hot water of the direct heat exchange unit performs work and heat exchange in the absorption heat pump 14, and the heat is used to preheat the hot water The hot water in the return pipe 31 enters the boiler 1 through the preheated hot water through the boiler return pipe 32 and is heated again. After reaching the heating temperature, it is supplied to the heat user through the hot water supply pipe 35 . The heated water enters the boiler 1 from the boiler return pipe 32 .

本实用新型经过与通过间接式换热单元进行烟气的显然回收,再通过直接式换热单元对烟气的潜热进行回收,防止烟气冷凝对设备的腐蚀及排放烟气的环境污染等问题。回收到的热量用于加热锅炉1的给水,即加热与水源连通的热水回水管31。提高了烟气的利用率,兼顾节能与环保目的;回收到的热量经过吸收热泵14提升温度后用于预热锅炉1的回水,节省了烟气锅炉消耗的天然气,同时,通过直接式换热单元的喷淋出水管27作用还能净化烟气中的氮氧化物,该装置可达到回收烟气冷凝余热和净化烟气的双重目的;具有结构简单、操作方便等优点。The utility model recycles the flue gas obviously through the indirect heat exchange unit, and then recovers the latent heat of the flue gas through the direct heat exchange unit, so as to prevent the corrosion of the equipment caused by the condensation of the flue gas and the environmental pollution of the exhausted flue gas. . The recovered heat is used to heat the feed water of the boiler 1 , that is, to heat the hot water return pipe 31 connected to the water source. The utilization rate of flue gas is improved, and the purpose of energy saving and environmental protection is taken into account; the recovered heat is used to preheat the return water of boiler 1 after being raised by the absorption heat pump 14, which saves the natural gas consumed by the flue gas boiler. The spray outlet pipe 27 of the heat unit can also purify the nitrogen oxides in the flue gas. The device can achieve the dual purposes of recovering the waste heat of flue gas condensation and purifying the flue gas; it has the advantages of simple structure and convenient operation.

本实施例中所述间接式换热单元包括通过烟道2与所述锅炉1连通的密封体5,所述密封体内设置有与所述烟道2连通的烟道管束6。密封体5为设置有空腔的密封结构,烟道管束6沿竖向设置于空腔内,补水管21与驱动热源管24分别与密封体5的空腔连通。烟气在烟道管束6内流动,水在烟道管束6外流动。In this embodiment, the indirect heat exchange unit includes a sealing body 5 communicating with the boiler 1 through a flue 2 , and a flue tube bundle 6 communicating with the flue 2 is arranged in the sealing body. The sealing body 5 is a sealing structure provided with a cavity, and the flue tube bundle 6 is vertically arranged in the cavity, and the water supply pipe 21 and the driving heat source pipe 24 communicate with the cavity of the sealing body 5 respectively. The flue gas flows in the flue tube bundle 6 , and the water flows outside the flue tube bundle 6 .

为了使换热效果更好,本实施例中所述补水管21设置于所述密封体的底部,所述驱动热源管24设置于所述密封体的顶部。In order to improve the heat exchange effect, in this embodiment, the water supply pipe 21 is arranged at the bottom of the sealing body, and the driving heat source pipe 24 is arranged at the top of the sealing body.

为了方便用水,本实用新型中还包括设置于所述补水管21与所述驱动热源管24之间的生活热水管22。In order to facilitate water use, the utility model also includes a domestic hot water pipe 22 arranged between the water supply pipe 21 and the driving heat source pipe 24 .

为了更加充分的利用烟气的显热,本实用新型中所述密封体5包括第一密封体3、第二密封体4及交换给水管23,设置两个密封体用于多级换热。所述补水管21设置于第二密封体4的底部,所述生活热水管22设置于所述第二密封体4的顶部,所述交换给水管23设置于所述第一密封体3的底部,所述驱动热源管24设置于所述第一密封体3的顶部,所述交换给水管23与所述生活热水管22连通。补水管21由第二密封体4底端进入,随着水量的增多,该水源从第二密封体4顶端流出,其中一部分作为采暖热水从生活热水管22输出,另一部分水源作为交换给水从交换给水管23输入。从第一密封体3出来的烟气进入第二密封体4和更低温度的水进行换热,从而进一步冷却烟气的温度。In order to make full use of the sensible heat of the flue gas, the sealing body 5 in the present invention includes a first sealing body 3, a second sealing body 4 and an exchange water supply pipe 23, and two sealing bodies are provided for multi-stage heat exchange. The water supply pipe 21 is arranged at the bottom of the second sealing body 4, the domestic hot water pipe 22 is arranged at the top of the second sealing body 4, and the exchange water supply pipe 23 is arranged at the top of the first sealing body 3. At the bottom, the driving heat source pipe 24 is arranged on the top of the first sealing body 3 , and the exchange water supply pipe 23 communicates with the domestic hot water pipe 22 . The water supply pipe 21 enters from the bottom of the second sealing body 4, and as the water volume increases, the water source flows out from the top of the second sealing body 4, part of which is output from the domestic hot water pipe 22 as heating water, and the other part of the water source is used as exchange water supply Input from exchange water supply pipe 23. The flue gas coming out of the first sealing body 3 enters the second sealing body 4 to exchange heat with water at a lower temperature, thereby further cooling the temperature of the flue gas.

本实施例中为了使烟气和水充分换热,在所述烟道管束6内设置有导流装置7。In this embodiment, in order to fully exchange heat between the flue gas and water, a flow guiding device 7 is provided in the flue tube bundle 6 .

本实用新型中所述直接式换热单元包括与所述烟道管束6连通的主塔体,所述主塔体内设置有喷淋器8及蓄水池10,所述注水管26及喷淋出水管27均与所述蓄水池10连接。烟气与喷淋器8喷出的水直接接触进行热量交换,为了让烟气和水充分换热,在喷淋管8与蓄水池10之间加入鹅卵石层9或波纹板层,鹅卵石具有较高的传热系数和较大比表面积,且其周围附着的喷淋水可快速地与烟气进行热量交换。本实施例中所述主塔体上设置有排烟管,所述排烟管上设置有除雾器11,也可以根据需要设置风机12。充分换热后的低温烟气经过除雾器11洁净后由风机12排出至大气中,及兼顾节能与环保于一体。The direct heat exchange unit described in the utility model includes a main tower body connected with the flue tube bundle 6, a sprinkler 8 and a water storage tank 10 are arranged in the main tower body, and the water injection pipe 26 and the spray pipe The outlet pipes 27 are all connected to the reservoir 10 . The flue gas is in direct contact with the water sprayed by the sprinkler 8 for heat exchange. In order to allow the flue gas and water to fully exchange heat, a pebble layer 9 or a corrugated board layer is added between the spray pipe 8 and the reservoir 10. The pebbles have High heat transfer coefficient and large specific surface area, and the spray water attached around it can quickly exchange heat with the flue gas. In this embodiment, the main tower body is provided with a smoke exhaust pipe, and the smoke exhaust pipe is provided with a mist eliminator 11, and a fan 12 can also be provided as required. After sufficient heat exchange, the low-temperature flue gas is cleaned by the demister 11 and then discharged into the atmosphere by the fan 12, and both energy saving and environmental protection are taken into consideration.

为了节约水资源,本实施例中所述喷淋出水管27与所述喷淋器8连通,喷淋水进入蓄水池10后进入喷淋器8继续进行喷淋。为了降低水的腐蚀性,在直接式换热单元中设置有净化箱13,即所述喷淋出水管27上设置有净化箱13,净化箱13能够检测水质ph值,从而定期对水质进行处理,喷淋水经水泵加压进入净化箱13,可以减少水的酸度,同时可以提高对烟气氮氧化物的脱出率,具有环保的效果。本实施例中蓄水池10上设置有溢水管25,当水位较高时,水会自动由溢水管道25排至系统外部,注水管26则可作为备用水源。In order to save water resources, the spray outlet pipe 27 in this embodiment communicates with the shower 8 , and the spray water enters the reservoir 10 and enters the shower 8 to continue spraying. In order to reduce the corrosiveness of water, a purification tank 13 is provided in the direct heat exchange unit, that is, the spray outlet pipe 27 is provided with a purification tank 13, and the purification tank 13 can detect the ph value of the water quality, thereby regularly treating the water quality , the spray water is pressurized into the purification box 13 through the water pump, which can reduce the acidity of the water, and can increase the removal rate of nitrogen oxides in the flue gas at the same time, which has an environmental protection effect. In this embodiment, the reservoir 10 is provided with an overflow pipe 25. When the water level is high, the water will be automatically discharged from the overflow pipe 25 to the outside of the system, and the water injection pipe 26 can be used as a backup water source.

本实用新型中所述管网包括均与所述蓄水池10连接的低温供水管28及低温回水管29。在直接式换热单元中热交换后的被加热的喷淋水通过换热器换热可作为吸收式热泵14的低温热源,通过低温供水管28与吸收式热泵14连接,低温供水管28内的喷淋水降温后通过循环水泵及低温回水管29返回蓄水池10继续进行热量交换。吸收式热泵的驱动热源为驱动热源管24,锅炉的回水可作为补充热源29。高温热源为通过供热水管支管30的水,供热水管支管30的水进入吸收式热泵14,吸收的热量等于直接接触式余热回收的热量加上驱动热源管24的驱动热量,热网水被加热后送入锅炉1通过热水回水管31给锅炉1给水。The pipe network in the utility model includes a low-temperature water supply pipe 28 and a low-temperature return water pipe 29 both connected to the reservoir 10 . The heated spray water after heat exchange in the direct heat exchange unit can be used as the low-temperature heat source of the absorption heat pump 14 through the heat exchanger, and is connected with the absorption heat pump 14 through the low-temperature water supply pipe 28, and the low-temperature water supply pipe 28 After the spray water is cooled down, it returns to the reservoir 10 through the circulating water pump and the low-temperature return pipe 29 to continue heat exchange. The driving heat source of the absorption heat pump is the driving heat source pipe 24 , and the return water of the boiler can be used as a supplementary heat source 29 . The high-temperature heat source is the water passing through the branch pipe 30 of the hot water supply pipe, and the water in the branch pipe 30 of the hot water supply pipe enters the absorption heat pump 14, and the heat absorbed is equal to the heat recovered by the direct contact waste heat plus the driving heat of the driving heat source pipe 24, and the water in the heating network is After heating, it is sent to the boiler 1 to feed water to the boiler 1 through the hot water return pipe 31 .

本实施例中提供的烟气余热回收装置,使用时,锅炉1的烟气经过第一密封体3及第二密封体4换热后进入直接式换热单元内换热,在直接式换热单元中热交换后的被加热的喷淋水通过换热器换热可作为吸收式热泵14的低温热源,通过低温供水管28与吸收式热泵14连接,低温供水管28内的喷淋水降温后通过循环水泵及低温回水管29返回蓄水池10继续进行热量交换。锅炉的回水可作为补充热源29。高温热源为通过供热水管支管30的水,供热水管支管30的水进入吸收式热泵14,吸收的热量等于直接接触式余热回收的热量加上驱动热源管24的驱动热量,热网水被加热后送入锅炉1通过热水回水管31给锅炉1给水。The flue gas waste heat recovery device provided in this embodiment, when in use, the flue gas from the boiler 1 passes through the first sealing body 3 and the second sealing body 4 for heat exchange and then enters the direct heat exchange unit for heat exchange. The heated spray water after heat exchange in the unit can be used as the low-temperature heat source of the absorption heat pump 14 through the heat exchanger, and is connected with the absorption heat pump 14 through the low-temperature water supply pipe 28, and the spray water in the low-temperature water supply pipe 28 is cooled Afterwards, return to the reservoir 10 through the circulating water pump and the low-temperature return pipe 29 to continue heat exchange. Boiler return water can be used as a supplementary heat source29. The high-temperature heat source is the water passing through the branch pipe 30 of the hot water supply pipe, and the water in the branch pipe 30 of the hot water supply pipe enters the absorption heat pump 14, and the heat absorbed is equal to the heat recovered by the direct contact waste heat plus the driving heat of the driving heat source pipe 24, and the water in the heating network is After heating, it is sent to the boiler 1 to feed water to the boiler 1 through the hot water return pipe 31 .

综上所述,本实用新型提供的烟气余热回收装置中的吸收式热泵分别通过供热水管支管及供热水管与锅炉连接,间接式换热单元上设置有补水管及驱动热源管,驱动热源管与供热水管支管连接;直接式换热单元上设置有注水管及喷淋出水管,直接式换热单元通过管网与吸收式热泵连接,锅炉与吸收式热泵之间设置有锅炉回水管,供热水管支管通过驱动热源回水管与锅炉回水管连接,锅炉回水管与水源连通。本实用新型提供的烟气余热回收装置通过间接式换热单元进行烟气的显然回收,再通过直接式换热单元对烟气的潜热进行回收,回收到的热量用于采暖热水和加热锅炉的给水,提高了烟气的利用率,可达到回收烟气冷凝余热和净化烟气的双重目的;具有结构简单、操作方便等优点。In summary, the absorption heat pump in the flue gas waste heat recovery device provided by the utility model is respectively connected to the boiler through the branch pipe of the water supply pipe and the water supply pipe, and the indirect heat exchange unit is provided with a water supply pipe and a driving heat source pipe to drive The heat source pipe is connected to the branch pipe of the water supply pipe; the direct heat exchange unit is provided with a water injection pipe and a spray outlet pipe, and the direct heat exchange unit is connected to the absorption heat pump through a pipe network, and a boiler return is provided between the boiler and the absorption heat pump. The water pipe and the branch pipe of the hot water supply pipe are connected to the boiler return pipe by driving the heat source return pipe, and the boiler return pipe is connected to the water source. The flue gas waste heat recovery device provided by the utility model performs obvious recovery of the flue gas through the indirect heat exchange unit, and then recovers the latent heat of the flue gas through the direct heat exchange unit, and the recovered heat is used for heating hot water and heating boilers The water supply improves the utilization rate of the flue gas, and can achieve the dual purposes of recovering the waste heat of the condensation of the flue gas and purifying the flue gas; it has the advantages of simple structure and convenient operation.

进一步地,为了降低水的腐蚀性,在直接式换热单元中设置有净化箱,可以减少水的酸度,同时可以提高对烟气氮氧化物的脱出率,具有环保的效果。Furthermore, in order to reduce the corrosiveness of water, a purification box is installed in the direct heat exchange unit, which can reduce the acidity of water and increase the removal rate of flue gas nitrogen oxides, which has an environmental protection effect.

以上实施例仅用以说明本实用新型的技术方案,而非对其限制;尽管参照前述实施例对本实用新型进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本实用新型各实施例技术方案的精神和范围。The above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be applied to the foregoing embodiments The technical solutions described in the examples are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. a flue gas waste heat recovery apparatus, it is characterized in that, comprise: the boiler (1), indirect type heat exchange unit, direct-type heat exchange unit and the absorption heat pump (14) that are connected successively, described absorption heat pump (14) is connected with described boiler (1) respectively by heat supply water pipe arm (30) and heat supply water pipe (35), described indirect type heat exchange unit is provided with filling pipe (21) and driving heat source pipe (24), described driving heat source pipe (24) is connected with described heat supply water pipe arm (30); Described direct-type heat exchange unit is provided with water injection pipe (26) and spray outlet pipe (27), described direct-type heat exchange unit is connected with described absorption heat pump (14) by pipe network, boiler blow-down water pipe (32) is provided with between described boiler (1) and described absorption heat pump (14), described heat supply water pipe arm (30) is connected with described boiler blow-down water pipe (32) by driving heat source return pipe (36), and described boiler blow-down water pipe (32) is communicated with water source.
2. flue gas waste heat recovery apparatus as claimed in claim 1, it is characterized in that: described indirect type heat exchange unit comprises the seal (5) be communicated with described boiler (1) by flue (2), be provided with the flue be communicated with described flue (2) in described seal and restrain (6).
3. flue gas waste heat recovery apparatus as claimed in claim 2, it is characterized in that: described filling pipe (21) is arranged at the bottom of described seal, described driving heat source pipe (24) is arranged at the top of described seal.
4. flue gas waste heat recovery apparatus as claimed in claim 3, is characterized in that: also comprise the domestic hot-water be arranged between described filling pipe (21) and described driving heat source pipe (24) and manage (22).
5. flue gas waste heat recovery apparatus as claimed in claim 4, it is characterized in that: described seal (5) comprises the first seal (3), second seal (4) and exchange feed pipe (23), described filling pipe (21) is arranged at the bottom of the second seal (4), described domestic hot-water's pipe (22) is arranged at the top of described second seal (4), described exchange feed pipe (23) is arranged at the bottom of described first seal (3), described driving heat source pipe (24) is arranged at the top of described first seal (3), described exchange feed pipe (23) is managed (22) and is communicated with described domestic hot-water.
6. flue gas waste heat recovery apparatus as claimed in claim 2, is characterized in that: be provided with guiding device (7) in described flue tube bank (6).
7. flue gas waste heat recovery apparatus as claimed in claim 2, it is characterized in that: described direct-type heat exchange unit comprises the main tower of to restrain (6) with described flue and being communicated with, be provided with spray thrower (8) and cistern (10) in described main tower, described water injection pipe (26) and spray outlet pipe (27) are all connected with described cistern (10).
8. flue gas waste heat recovery apparatus as claimed in claim 7, it is characterized in that: described spray outlet pipe (27) is communicated with described spray thrower (8), described spray outlet pipe (27) is provided with purifying box (13).
9. flue gas waste heat recovery apparatus as claimed in claim 7, is characterized in that: described pipe network comprises the low temperature supplying water pipe (28) and low-temperature return water pipe (29) that are all connected with described cistern (10).
10. flue gas waste heat recovery apparatus as claimed in claim 7, is characterized in that: described main tower is provided with smoke exhaust pipe, described smoke exhaust pipe is provided with demister (11).
CN201520811591.0U 2015-10-19 2015-10-19 Flue gas waste heat recovery device Expired - Fee Related CN205065770U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105222146A (en) * 2015-10-19 2016-01-06 北京建筑大学 A kind of flue gas waste heat recovery apparatus
CN106594777A (en) * 2016-11-29 2017-04-26 无锡市锡源锅炉有限公司 Self-cleaning boiler waste heat recovery device based on smoke pressure detection
CN108088074A (en) * 2017-12-03 2018-05-29 天津大学 Novel oil smoke heat recovery system and method based on absorption heat pump
CN108844052A (en) * 2018-06-19 2018-11-20 山东中农绿能工程设计有限公司 A kind of selection method of the mating steam accumulator of steelwork converter
CN111365727A (en) * 2020-03-23 2020-07-03 山东省科学院能源研究所 Small household biomass boiler flue gas waste heat recovery and purification device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105222146A (en) * 2015-10-19 2016-01-06 北京建筑大学 A kind of flue gas waste heat recovery apparatus
CN105222146B (en) * 2015-10-19 2017-10-27 北京建筑大学 A kind of flue gas waste heat recovery apparatus
CN106594777A (en) * 2016-11-29 2017-04-26 无锡市锡源锅炉有限公司 Self-cleaning boiler waste heat recovery device based on smoke pressure detection
CN108088074A (en) * 2017-12-03 2018-05-29 天津大学 Novel oil smoke heat recovery system and method based on absorption heat pump
CN108844052A (en) * 2018-06-19 2018-11-20 山东中农绿能工程设计有限公司 A kind of selection method of the mating steam accumulator of steelwork converter
CN111365727A (en) * 2020-03-23 2020-07-03 山东省科学院能源研究所 Small household biomass boiler flue gas waste heat recovery and purification device

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