CN203928799U - Dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus - Google Patents

Dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus Download PDF

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Publication number
CN203928799U
CN203928799U CN201420354889.9U CN201420354889U CN203928799U CN 203928799 U CN203928799 U CN 203928799U CN 201420354889 U CN201420354889 U CN 201420354889U CN 203928799 U CN203928799 U CN 203928799U
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water tank
flue gas
heat
water
inlet pipe
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CN201420354889.9U
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刘勇
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Sichuan Lianzhi Environmental Energy Technology Co., Ltd
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SICHUAN SHENGZHI XINLIAN ENERGY SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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Abstract

The utility model discloses a kind of dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus, comprise that cross section is that rectangular water tank and the cross section that is arranged at water tank upper are trapezoidal separator, water tank inside be provided be communicated with water inlet pipe for controlling the ball float water-supply valve of water tank water level inside, the inner position near bottom of described water tank is arranged with dividing plate, between described water tank wall and dividing plate, form decline passway, between two dividing plates, be provided with heat-exchanging tube bundle, described water tank lateral wall is provided with and the flue gas inlet pipe of water tank internal communication near the position at top, one end that described flue gas inlet pipe is positioned at water tank inside is connected with flue gas arm.The heat-transfer capability in the utility model energy intensified heat exchange tube bundle district, the heat exchange area of reduction heat-exchanging tube bundle, volume and the cost of reduction heat exchanger; Can also catch flue dust and the part harmful substance in flue gas, reduce discharge simultaneously.

Description

Dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus
Technical field
The utility model belongs to boiler smoke-gas residual-heat recovering device field, is specifically related to a kind of dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus.
Background technology
General boiler or other industrial combustion equipments, its flue gas discharge temperature is higher, reaches hundreds of degrees Celsius, has certain heat recovery and is worth.For Mist heat recovering, generally adopt heat exchanger, by the form of exchange heat, reduce the exhaust gas temperature of flue gas, by heat recovery back boiler, or other need the place of heat supply.As heating boiler feedwater, or the air of heating boiler burning use, thereby can realize the recovery of heat.A large amount of recovery technologies proposes for this reason.
A kind of flue gas waste heat recovery TRT (CN 201280956 Y), is made up of heating system, injection system and electricity generation system; Heating system is made up of heat conducting oil boiler, filter, point oil cylinder, uplink cycle pump, downlink cycle pump, oil-collecting cylinder, fluid up-hill line, the descending pipeline of fluid; Heat conducting oil boiler is communicated with flue collector through by-pass flue, is provided with flue gas and switches control valve in by-pass flue; Injection system is in parallel with the descending pipeline of fluid, and injection system is made up of filling pump, expansion slot, hot oil pump, deep fat storage tank; Electricity generation system is made up of evaporimeter, secondary preheating device, turbine, generator, preheater, condenser, a working medium circulating pump, working medium circulating pump is arranged on working medium liquid pipe, on the descending pipeline of fluid, oiling pipeline, working medium gas phase pipeline, is provided with by-pass valve control.This device adopts double-work medium binary cycle system.
A kind of recoverying and utilizing method of waste heat of flue gas of heating furnace and reheat furnace system (CN 101846459 A) have proposed a kind of recoverying and utilizing method of waste heat of flue gas of heating furnace.The method is that air and heating furnace flue gas are out introduced respectively to heat-exchanger rig, carries out heat exchange in described heat-exchanger rig, and the air after heat exchange is sent in described heating furnace, and the flue gas after heat exchange is discharged to described heat-exchanger rig.
High-grade recycling system for exhaust heat of power station boiler (CN 201779684 U) has proposed a kind of station boiler waste heat system for high-grade recycling waste.This system is provided with successively flue gas waste heat recovery secondary heat exchanger and heat exchanger of flue gas waste heat recovery by flue gas trend on flue, heat exchanger of air preheat is installed, heat exchanger of air preheat, heat exchanger of flue gas waste heat recovery and sealing water circulation road of a water circulating pump composition in the connecting pipe of air-blaster and air preheater.This system promotes air preheater exit gas temperature by improving air preheater intake air temperature, thereby obtains higher flue gas waste heat recovery temperature, for heated feed water, accomplishes the recycling of fume afterheat high-grade.
Waste incineration heat recovery boiler (CN101701702A) the invention discloses a kind of waste incineration heat recovery boiler, comprises boiler body and connection thereon and the exhaust gases passes being formed by water-cooling wall; In exhaust gases passes, be provided with evaporimeter, superheater and economizer; Wherein in exhaust gases passes, be also provided with dust arrester.The present invention overcomes the shortcoming that prior art exists, in the flue gas that it can produce in waste incineration, separate and collect and mostly not adsorb harmful substance and belong to the flying dust of general refuse, the harmful substance such as dioxin, heavy metal reducing to greatest extent in flue gas is adsorbed in flying dust, and danger wastes flying dust in traditional garbage incinerating power plant is become to recycling general solid waste; Improve the thermal efficiency of waste heat boiler simultaneously, reduce the load of flue gas purification system, extend the service time of incinerator.
Converter waste gas waste heat recycling system (CN 101482373 B) relates to converter waste gas waste heat recycling system, comprise waste heat boiler of revolving furnace fume hood, steam-water separator, coaming plate and ceiling, flue gas purification system, final dusting smoke box, flue gas purification system, steam-driven generator, connecting a converter waste gas decline pipeline at the smoke outlet of revolving furnace fume hood calandria waste heat boiler is connected with secondary waste heat steam generator system, this secondary waste heat steam generator system is by secondary waste heat boiler, steam (vapor) outlet, exhanst gas outlet, soft water pipeline, flowmeter and pipeline valve, steam pressure gauge, water level is taken into account safety valve, regulate many fans valve of suction.This system all collects the steam of a few part of waste heat boilers such as one-time dedusting, final dusting, secondary recovery, upper coaming plate, the converter waste gas waste heat likely utilizing is fully fully recycled, reduce the water consumption of system, reduce the cement mortar treating capacity of rear step operation, reached the object of energy-saving and emission-reduction.
Coal-fired boiler in thermal power plant smoke discharging residual heat reclaims and reduces discharging comprehensive application system (CN 102305413 B) and proposed a kind of coal-fired boiler in thermal power plant smoke discharging residual heat recovery and reduced discharging comprehensive application system, along the flow direction of flue gas, on pipeline between from boiler to chimney, be disposed with air preheater, the first low-level (stack-gas) economizer, low cold precipitator, air-introduced machine, the second low-level (stack-gas) economizer, desulfurization island, air preheater import respectively with a cold wind pipeline, cold Secondary Air pipeline is connected, cold Secondary Air pipeline is provided with Secondary Air steam air heater, Secondary Air steam air heater is communicated with the second low-level (stack-gas) economizer by hydrophily pipeline, hydrophily pipeline is provided with expansion tank, water pump, the application is low-level (stack-gas) economizer subsection setup, and one section is used for heat-setting water, one section is situated between and is heated the cold Secondary Air of air preheater import by hydrophily, the application's maximizing utilizes fume afterheat, can reduce unit hear rate, reduce the equipment energy consumptions such as deduster, air-introduced machine, pressure fan, reduce station service power consumption rate, improve the economy of power plant, save more efficiently energy consumption, be conducive to the construction of low-carbon (LC) society.
A kind of coal-water boiler exhaust gas residual heat recovery device (CN 201606865 U) adopts water as heat catalysis, cooling and the residual heat using device of boiler exhaust gas is separated, avoid because heating surface leaks the safety problem causing, can realize flue gas waste heat utilization device with switching season simultaneously.Specifically in air preheater (or deduster) flue afterwards, arrange gas cooler, using water as heat catalysis, first make water heat temperature raising in gas cooler, reduce exhaust gas temperature; Then, the thermal release in another heat exchanger, water being absorbed in gas cooler, for heating main condensate to improve low pressure feed water temperature or heating cold air to improve boiler inlet temperature.After adopting this system, can make boiler exhaust gas waste heat obtain fully effectively recycling, reduce the amount of drawing gas of heat regenerative system, improve unit generation and exert oneself, reduce gross coal consumption rate.
From prior art, flue gas waste heat recovery, all relates to heat exchanger.Because flue gas is as a kind of gas, its density is low, and therefore the heat transfer coefficient of fume side is low, causes heat exchanger heat exchange area large, and heat exchanger cost is high.In order to strengthen the heat transfer of fume side, some designs have adopted increases the measure that fin conducts heat to increase fume side.But being limited to existing manufacturing technology, the strengthening of air side, still can not bring up to and the degree of managing interior water and forcing heat exchange, therefore can not obtain desirable design of heat exchanger.In order to address this problem, the method that patent CN 201606865U adopts cigarette G&W first to mix is therefore expected to obtain less heat exchange area in design of heat exchanger.But this design still needs a pump, guarantee heat exchange efficiency, system forms complicated.And this design adopted special pond, therefore volume is larger.
Summary of the invention
Technical problem to be solved in the utility model is for above-mentioned the deficiencies in the prior art, a kind of dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus is provided, the heat-transfer capability in energy intensified heat exchange tube bundle district, the heat exchange area of reduction heat-exchanging tube bundle, volume and the cost of reduction heat exchanger; Can also catch flue dust and the part harmful substance in flue gas, reduce discharge simultaneously.
The technical scheme that the utility model adopts is: a kind of dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus, comprise that cross section is that rectangular water tank and the cross section that is arranged at water tank upper are trapezoidal separator, water tank inside be provided be communicated with water inlet pipe for controlling the ball float water-supply valve of water tank water level inside, the inner position near bottom of described water tank is arranged with dividing plate, between described water tank wall and dividing plate, form decline passway, between two dividing plates, be provided with heat-exchanging tube bundle, described water tank lateral wall is provided with and the flue gas inlet pipe of water tank internal communication near the position at top, one end that described flue gas inlet pipe is positioned at water tank inside is connected with flue gas arm, described flue gas arm away from one end of flue gas inlet pipe near water tank bottom, on flue gas arm, be evenly provided with spray-hole, water tank inner bottom surface is obliquely installed, compare Di one end, water tank inner bottom surface position is provided with the blowoff valve with its internal communication, top, described separator is respectively equipped with bottom the foam removal net being connected with its inner wall sealing.
As preferably, described water tank and separator's one sealing moulding.
As preferably, described dividing plate and tank inner wall are tightly connected.
The beneficial effects of the utility model are:
(1) arranging of ball float water-supply valve can be carried out automatic supply, guaranteed water level to the water level in water tank;
(2) decline passway forming between water tank wall and dividing plate is convenient to flue gas and is directly dropped to water tank bottom, and carries out heat exchange with heat-exchanging tube bundle;
(3) water tank inner bottom surface is obliquely installed, and is provided with blowoff valve, is convenient to blowdown.
Brief description of the drawings
Fig. 1 is the utility model structural front view.
In figure: 1, water tank; 2, separator; 3, ball float water-supply valve; 4, dividing plate; 5, decline passway; 6, heat-exchanging tube bundle; 7, flue gas inlet pipe; 8, flue gas arm; 9, blowoff valve; 10, foam removal net.
Detailed description of the invention
Below in conjunction with the accompanying drawings and the specific embodiments the utility model is described in further detail.
As shown in Figure 1, a kind of dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus, comprise that cross section is that rectangular water tank 1 and the cross section that is arranged at water tank 1 top are trapezoidal separator 2, water tank 1 inside be provided be communicated with water inlet pipe for controlling the ball float water-supply valve 3 of water tank 1 water level inside, the inner position near bottom of described water tank 1 is arranged with dividing plate 4, between described water tank wall and dividing plate 4, form decline passway 5, two 4, dividing plates are provided with heat-exchanging tube bundle 6, described water tank 1 lateral wall is provided with and the flue gas inlet pipe 7 of water tank 1 internal communication near the position at top, one end that described flue gas inlet pipe 7 is positioned at water tank 1 inside is connected with flue gas arm 8, described flue gas arm 8 away from one end of flue gas inlet pipe 7 near water tank 1 bottom, on flue gas arm 8, be evenly provided with spray-hole, water tank 1 inner bottom surface is obliquely installed, water tank 1 compare Di one end, inner bottom surface position is provided with the blowoff valve 9 with its internal communication, 2 tops, described separator are respectively equipped with bottom the foam removal net 10 being connected with its inner wall sealing.
As preferably, described water tank 1 and separator's 2 one sealing mouldings.
As preferably, described dividing plate 4 is connected with water tank 1 inner wall sealing.
When flue gas is from after flue gas inlet pipe 7, be assigned to flue gas arm 8, and flow to water tank 1 bottom along flue gas arm 8.The aperture ejection being evenly arranged from flue gas arm 8, mixes with the water in water tank 1.After mixing, the air-water mixture direct heat transfer of formation, so just has the much bigger heat exchange area of more general heat exchanger.And because air water directly contacts, heat exchange resistance reduces greatly.Due to the vigorous agitation effect of air-water mixture, the ability of the flue gas heat transmission feedwater therefore improving greatly, heat passing time is shorter.
Flue gas and water form air water two-phase mixture, and its density is low more compared with the single-phase water density of side decline passway 5.Under Action of Gravity Field, in the time of equal height, because density contrast exists, therefore water can flow downward along decline passway 5, and the natural circulation that the air-water mixture of heat-exchanging tube bundle 6 upwards flows.In the time that air-water mixture arrives water tank 1 top gas-water interface, due to buoyancy, there is gas-water separation interface at this in air water, and level is to side flow, and cooled flue gas continues upwards to flow.Thereby realize gas-water separation.As long as flue gas constantly enters water tank 1, and gas-water separation occurs on top, this Natural Circulation just can long term maintenance.
Due to flowing of water tank 1 interior water, therefore the coefficient of heat transfer of flue gas can significantly improve, and therefore the design of heat-exchanging tube bundle 6 Structure of need compactnesses, reduces needed heat exchange area.Owing to adopting Natural Circulation, the designs such as extra water pump are saved compared with other design.
In addition, while flowing through heat-exchanging tube bundle 6 due to air-water mixture, due to crossing current effect, the disturbance boundary layer enough larger compared with single-phase flow kinetic energy, thus additionally increase heat exchange, reach the object of augmentation of heat transfer.
In the time of flue gas process water tank 1, realize the seizure to flue dust in flue gas, thereby part reduces the soot emissions of flue gas, reduce the pollution to environment.In order to ensure the water quality of water tank 1, need to regularly replace the water in water tank, its processing method is identical with existing industrial sewage process method.Because the solid pollutant quantity of flue gas is less, so total product quantity is less.
In addition, due to the violent disturbance of flue gas water, the concussion of heat-exchanging tube bundle 6 surfactant fluids can be aggravated, the formation of heat-exchanging tube bundle 6 surperficial dirts can be limited like this.Therefore equipment has certain automatic cleaning action, reduces maintenance work.The water level of water tank 1 is controlled automatically by ball float water-supply valve 3.Water tank 1 bottom is provided with inclined plane, at inclined plane lowest part, blowoff valve 9, periodical blowdown is set.
The above embodiment has only expressed the specific embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (3)

1. a dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus, it is characterized in that: comprise that cross section is that rectangular water tank and the cross section that is arranged at water tank upper are trapezoidal separator, water tank inside be provided be communicated with water inlet pipe for controlling the ball float water-supply valve of water tank water level inside, the inner position near bottom of described water tank is arranged with dividing plate, between described water tank wall and dividing plate, form decline passway, between two dividing plates, be provided with heat-exchanging tube bundle, described water tank lateral wall is provided with and the flue gas inlet pipe of water tank internal communication near the position at top, one end that described flue gas inlet pipe is positioned at water tank inside is connected with flue gas arm, described flue gas arm away from one end of flue gas inlet pipe near water tank bottom, on flue gas arm, be evenly provided with spray-hole, water tank inner bottom surface is obliquely installed, compare Di one end, water tank inner bottom surface position is provided with the blowoff valve with its internal communication, top, described separator is respectively equipped with bottom the foam removal net being connected with its inner wall sealing.
2. dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus according to claim 1, is characterized in that: described water tank and separator's one sealing moulding.
3. dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus according to claim 1 and 2, is characterized in that: described dividing plate and tank inner wall are tightly connected.
CN201420354889.9U 2014-06-30 2014-06-30 Dedusting Natural Circulation augmentation of heat transfer flue gas waste heat recovery apparatus Active CN203928799U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105806107A (en) * 2014-12-31 2016-07-27 天津华赛尔传热设备有限公司 Sediment flushing water heat exchanger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105806107A (en) * 2014-12-31 2016-07-27 天津华赛尔传热设备有限公司 Sediment flushing water heat exchanger

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GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20200612

Address after: 610000 No. 16 East Yulin street, Chengdu, Sichuan, Wuhou District

Patentee after: Sichuan Lianzhi Environmental Energy Technology Co., Ltd

Address before: 610000, Huaxi building, 5 tree lined street, Sichuan, Chengdu. B1202

Patentee before: SICHUAN SHENGZHI XINLIAN ENERGY SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd.

TR01 Transfer of patent right