CN202581247U - Waste heat utilization system for natural gas burner - Google Patents
Waste heat utilization system for natural gas burner Download PDFInfo
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- CN202581247U CN202581247U CN 201220171229 CN201220171229U CN202581247U CN 202581247 U CN202581247 U CN 202581247U CN 201220171229 CN201220171229 CN 201220171229 CN 201220171229 U CN201220171229 U CN 201220171229U CN 202581247 U CN202581247 U CN 202581247U
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Abstract
The utility model discloses a waste heat utilization system for a natural gas burner, which comprises a heat pipe boiler for collecting the flue gas of the natural gas burner for heat transfer and a water preheating exchanger, wherein the gas inlet of the heat pipe boiler is communicated with each chimney of the natural gas burner through a flue gas main pipe, the gas outlet of the water preheating exchanger is communicated with an induced draft device, the water inlet of the heat pipe boiler is communicated with a water supply device posterior to the water preheating exchanger, the vapor outlet of the heat pipe boiler is communicated with the vapor inlet of a steam storage tank, and the vapor outlet of the steam storage tank is communicated with each facility which needs to be heated by water vapor. The waste heat utilization system for the natural gas burner has the advantages of small total investment, short investment recovery period, significant energy-saving effect, cost effectiveness and environmental friendliness.
Description
(1) technical field:
The utility model relates to the thermal energy collecting system, is specially a kind of natural gas fired incinerators bootstrap system.
(2) background technology:
Along with the develop rapidly of Chinese Automobile Industry ', brought relevant with it supporting industry--the continuous expansion of vehicle glass processing industry simultaneously, some advanced glass processing equipment are from being introduced into China abroad.What the applicant unit was engaged in is that vehicle glass is made; The process ten years development also is accompanied by professional expansion; A shelves glass Continuous Heat curves molded lines before having introduced an automobile in 1997; Adopting gas-firing to come hot bending glass, substitute the traditional electrical heating, is a domestic unique production line that uses natural gas fired incinerators (Lehr stove) hot briquetting glass.
The maximum characteristics of natural gas fired incinerators (Lehr stove) are: can produce big specification and glass curvature and require the preceding shelves of big automobile glass, can produce continuously, and highly efficient in productivity, and the glass optical effect of producing is superior to electric furnace.
Natural gas fired incinerators (Lehr stove) is to use combustion of natural gas to come the heating glass moulding; In combustion process; Waste natural gas after the burning is connected with three diameter 600mm smoke evacuation tracheaes through blower fan, and the smoke evacuation tracheae directly is discharged to flue gas in the atmosphere outside the workshop.
Through measuring and calculating, it is 922294.9 (kJ/h) that three chimneys are discharged the flue gas total amount of heat, is 73% of the whole heat of this stove, how effectively to prevent thermal loss, and energy-saving and emission-reduction are the primary problems that solve of the applicant unit.
(3) utility model content:
For this reason, the applicant has proposed a kind of natural gas fired incinerators bootstrap system utility model patent, its objective is the flue gas heat of collecting and utilizing discharge, accomplishes to save energy and reduce the cost.
Can realize the natural gas fired incinerators bootstrap system of above-mentioned purpose; Comprise and collect the heat pipe boiler that the combustion of natural gas kiln gas carries out the heat conversion; The air inlet of said heat pipe boiler is communicated with each chimney of natural gas fired incinerators through the flue gas house steward, and the gas outlet of heat pipe boiler is communicated with blower unit, and the water inlet of heat pipe boiler is communicated with water supply installation; The steam (vapor) outlet of heat pipe boiler is communicated with the air intake of steam vapour storage tank, and the venthole of said steam vapour storage tank is connected each facility that heats with water vapour.
Technical scheme according to the utility model proposition; Blower unit imports heat pipe boiler with the combustion of natural gas kiln gas; Water carries out being heated into steam after the heat exchange with high-temperature flue gas in heat pipe boiler, and steam gets in the steam vapour storage tank and stores, and provides to each facility that heats with water vapour; Effectively utilize the heat energy of high-temperature flue gas with this, the flue gas of cooling enters atmosphere with blower unit.
Further continue to utilize the heat pipe boiler gas outlet to discharge the waste heat of flue gas; The utility model also comprises the water preheat interchanger that utilizes fume afterheat to carry out the heat conversion; The water journey of said water preheat interchanger is connected the water inlet and the water supply installation of heat pipe boiler, and the gas journey of water preheat interchanger is connected the gas outlet and the blower unit of heat pipe boiler.Through the processing of water preheat interchanger, increase the temperature that gets into heat pipe boiler water, improve heat exchanger effectiveness, further reduce the temperature of discharging flue gas, prevent greenhouse effects.
For preventing in heat pipe boiler, to form incrustation scale, said water supply installation is a soft water supply mechanism; Said blower unit adopts blower fan.
For flue gas constant pressure of flue gas in the process of converging of guaranteeing each chimney constant; Do not influence each chimney to Influence of Temperature in the stove; Thereby the temperature balance in the assurance stove; Can set up (electronic) ratio butterfly valve (the former butterfly valve of being furnished with automatic control of each chimney) of being controlled by flue gas pressures in the outlet of each chimney, the openings of sizes of this ratio butterfly valve is controlled by the flue gas pressures of each chimney breast.
Be the further normal operation of assurance system; The heat pipe boiler flue gas pressures is accelerated or the frequency conversion fan of the air draft speed that slows down (its rotating speed size is to control by getting into heat pipe boiler pressure) according to getting in said blower fan employing; Behind technique initialization pressure; The actual pressure that utilization records and the pressure of this setting compare, and control that frequency conversion fan is accelerated or the extraction speed of the flue gas that slows down, accelerate or the system that slows down in heat exchange amount.
The said facility that heats with water vapour is mainly heating water tank, comprises the heating water tank that hot water is provided to glass cleaning machine, or for the heating water tank of hot water is provided to office's heating system.
The heat transfer element of heat pipe boiler adopts the gravity assisted heat pipe with high heat-transfer performance.
The advantage of the utility model:
The gross investment of the utility model natural gas fired incinerators bootstrap system is few, and the investment payback time is short, and energy-saving effect is obvious, economic environmental protection.
(4) description of drawings:
Fig. 1 is the structural representation of a kind of embodiment of the utility model.
Figure number sign: 1, heat pipe boiler; 2, flue gas house steward; 3, water preheat interchanger; 4, steam vapour storage tank; 5, heating water tank; 6, soft water supply mechanism; 7, frequency conversion fan; 8, natural gas fired incinerators; 9, chimney; 10, soft water water tank; 11, smoke exhaust pipe.
(5) specific embodiment:
Be described further in the concrete utilization of applicant unit below in conjunction with the technical scheme of accompanying drawing the utility model:
The utility model natural gas fired incinerators bootstrap system mainly is made up of heat pipe boiler 1 (heat transfer piece is a gravity assisted heat pipe), flue gas house steward 2, (softening) water preheat interchanger 3, soft water water tank 10, steam vapour storage tank 4, heating water tank 5, soft water supply mechanism 6 and frequency conversion fan 7.Three chimneys 9 of natural gas fired incinerators 8 (each chimney 9 outlet is respectively arranged with electronic ratio butterfly valve) meet at flue gas house steward 2; Flue gas house steward 2 is communicated with the air inlet of heat pipe boiler 1; The gas outlet of heat pipe boiler 1 is through pipeline connection frequency conversion fan 7, and frequency conversion fan 7 is communicated with smoke exhaust pipe 11; Soft water supply mechanism 6 is through the water inlet of pipeline connection water preheat interchanger 3, and the delivery port of water preheat interchanger 3 is through pipeline connection soft water water tank 10 water inlets, and soft water water tank 10 delivery ports are through the water inlet of pipeline connection heat pipe boiler 1; The vapor outlet port of heat pipe boiler 1 is through the air inlet of pipeline connection steam vapour storage tank 4; The gas outlet of steam vapour storage tank 4 is through pipeline connection heating water tank 5; Heating water tank 5 is respectively seven table glass cleaning machines with heating water tank 5 with to the heating water tank 5 of office heating, and is as shown in Figure 1.
The utility model is realized the approach of UTILIZATION OF VESIDUAL HEAT IN:
1, the hot gas of three chimneys 9 is aggregated into flue gas house steward 2, then through heat pipe boiler 1, utilizes the heat of this flue gas will pass through softening normal-temperature water and is heated to steam condition, collects this steam then in steam vapour storage tank 4, produces a certain amount of and steam pressure.
2, the steam that produces is sent to through pipeline in the heating water tank 5 in the 7 table glass cleaning equipments in workshop, through the private exchange device, the water of heating and normal-temperature, the water temperature requirements to 65 degree of technological requirement replaces the electrical heating in the water tank, reaches energy-conservation purpose.
The part excess steam that 3, will produce is transported in another heating water tank 5 through pipeline, and normal-temperature water is heated to 95 degree, spends water pumps through pump in each radiator of office of company with 95 then, carries out warming, substitutes air-conditioning, reaches purpose of saving.
4, the fume afterheat that comes out of heat pipe boiler 1 is utilized once more, i.e. the soft water temperature that heat exchange is carried out in heating improves the thermal efficiency of heat pipe boiler 1.
The key point of the utility model project:
1, electric control loop reasonable in design is guaranteed when this project of use, can not have influence on the thermal balance in the original stove, and the heat in the stove can not be taken out more, can not take out less, guarantees the normal moulding of glass in the stove.
2, the waste heat system in use as breaks down, and this system can automatically switch to the state before transforming, and keeps the ordinary production of this stove.
When 3, steam exchanges in glass cleaning heating water tank 5, steadily can not produce noise, and when not using steam, to automatically switch to the electrical heating state of raw water box.
4, the principle of gravity assisted heat pipe:
Gravity assisted heat pipe is the core component of heat pipe boiler 1.Gravity assisted heat pipe is a kind of heat transfer element with high heat-transfer performance, and it transmits heat through the latent heat of phase change of working media in the airtight vacuum shell, and its heat transfer property is similar to the performance of superconduction conduction, and therefore, it has the high characteristics of the big heat transfer efficiency of heat-transfer capability.
The control principle of the utility model: for the flue gas that guarantees each chimney 9 in the process of converging; The pressure of flue gas is constant, does not influence Influence of Temperature in 9 pairs of stoves of each chimney, on each chimney 9 except the butterfly valve that keeps original automatic control; Also have additional an electronic ratio butterfly valve; The openings of sizes of this butterfly valve is controlled by the flue gas pressures of each chimney 9 outlet, and main purpose is constantly to guarantee that each chimney 9 outlet pressure is constant, thereby guarantees the temperature balance in the stove.The rotating speed size of frequency conversion fan 7 is to be controlled by the pressure (getting into heat pipe boiler 1 pressure) of staying on the flue simultaneously; In case the pressure on the flue collector according to technique initialization after; The actual pressure that utilization records and the pressure of this setting compare; Control that frequency conversion fan 7 is accelerated or the fume extraction speed of the main chimney that slows down, accelerate or the system that slows down in heat exchange amount, the assurance system normally moves.
In order to guarantee not produce at the LEHR stove, in the absence that steam produces, each water tank still can utilize original electrical heating to carry out work; In electrical control design, every cleaning machine heating water tank 5 adopts two cover systems to change automatically, is lower than 50 when spending in water temperature; Work is carried out in steam in the water tank and electrical heating simultaneously, in case be higher than 50 degree, steam carries out work; Purpose of design is when not having steam like this; Electrical heating can guarantee the water tank water temperature 50 the degree, avoid operational conversion, the assurance system can control automatically.For the exchange energy that can guarantee each heating water tank 5 of cleaning machine is normally carried out; And steam electrically-controlled valve ability operation steady in a long-term; Before the steam electrically-controlled valve, increased heat-extraction system outside the cover automatic pipeline moisture, the moisture of pipeline steam has been separated, when heat exchange is carried out in water flowing in water tank with special-purpose switch through electrically-controlled valve like this; Because of moisture contained in the water vapour few; Can not produce the situation of liquid hammer, cause the impact of water in the water tank and excessive, make whole exchange process not only steadily but also can efficiently exchange.
The utility model project waste heat recovery heat energy utilization is adjusted:
1, reclaiming flue gas heat energy adjusts:
[1], three chimney 9 total exhaust gas volumns are 1907.27Nm
3/ h, the thermal capacitance of flue gas is 1.3KG/ (Nm
3.k), the temperature of mixing back flue gas is 369 ℃.
[2], producing pressure is 5kg/cm
3With temperature be that 150 ℃ of steam heat content are 656.3kcal/kg.
[3], the efficient of heat pipe boiler 1 is taken as 95%.
[4], the air outlet temperature of heat pipe boiler 1 is 160 ℃.
Then the producible quantity of steam of waste heat of the flue gas of this heating furnace discharge is: 1.32X1907.27X201X0.95/ (656.3X4.186)=181.95kg/h.
The thermal content of steam is 656.3X181.95X4.186=499866.104 (KJ/H)=138KW.
Every day, the heat energy of month recovery was 138X24X30=99504KWH by calculating in 30 days in every month by 24 hours.
The power consumption of seven table glass cleaning machines calculates:
Existing 7 cleaning machines, according to the statistics of electricity consumption in every month, 7 average electricity consumptions of cleaning machine in every month are 80000KWH.
Through top calculating, the heat 99504KWH of waste heat recovery uses electrisity consumption 80000KWH greater than cleaning machine, in addition; Water in each water tank of our glass cleaning machine is from single-cycle in carrying out; In case in the times of the water heating process in the water tank is required 65 ℃, the steam of supply will break automatically, stops heating; Treat that the water temperature in the water tank is lower than 65 ℃; Steam just begins in water tank to replenish steam again, so heat that should waste heat recovery is far longer than the heat that cleaning machine is per hour consumed.
So this project plan, is supplied with company's office building with excess steam and is done the heating in winter, replace the air-conditioning in winter to use, estimate every month saves energy 5000KWH.The gross investment of the utility model project is 1,400,000 yuan, the annual benefit that produces:
1, seven cleaning machine economize on electricitys: every month 80000KWH, be 960000KWH every year, and every degree electricity calculates by 0.63, and practicing thrift the electricity charge year is 960000X0.63=604800 unit.
2, office's warming electricity consumption, annual by calculating in 5 months, every month economize on electricity 5000KWH, practicing thrift the electricity charge year is 5X5000X0.63=15750 unit.
Above to practice thrift be 620550 yuan two every days, the investment payback time of this project is 1400000/620550=2.25.
The social benefit of the utility model project:
But 1, every year 500 tons of standard coals.
2, reduce 3.6 tons of sulfur dioxide (SO2) emissions.
3, annual minimizing CO2 emission is 1000 tons.
Claims (7)
1. natural gas fired incinerators bootstrap system; It is characterized in that: comprise and collect the heat pipe boiler (1) that natural gas fired incinerators (8) flue gas carries out the heat conversion; The air inlet of said heat pipe boiler (1) is communicated with each chimney (9) of natural gas fired incinerators (8) through flue gas house steward (2); The gas outlet of heat pipe boiler (1) is communicated with blower unit; The water inlet of heat pipe boiler (1) is communicated with water supply installation, and the steam (vapor) outlet of heat pipe boiler (1) is communicated with the air intake of steam vapour storage tank (4), and each facility that heats with water vapour is connected in the gas outlet of steam vapour storage tank (4).
2. natural gas fired incinerators bootstrap system according to claim 1; It is characterized in that: comprise that also the fume afterheat that utilizes heat pipe boiler (1) gas outlet to discharge carries out the water preheat interchanger (3) of heat conversion; The water journey of said water preheat interchanger (3) is connected the water inlet and the water supply installation of heat pipe boiler (1), and the gas journey of water preheat interchanger (3) is connected the gas outlet and the blower unit of heat pipe boiler (1).
3. natural gas fired incinerators bootstrap system according to claim 2 is characterized in that: said water supply installation is soft water supply mechanism (6), and said blower unit is a blower fan.
4. natural gas fired incinerators bootstrap system according to claim 3 is characterized in that: the ratio butterfly valve of being controlled by flue gas pressures is set up in the outlet of said each chimney (9).
5. natural gas fired incinerators bootstrap system according to claim 4 is characterized in that: said blower fan is for heat pipe boiler (1) flue gas pressures is accelerated or the frequency conversion fan (7) of the air draft speed that slows down according to getting into.
6. according to any described natural gas fired incinerators bootstrap system in the claim 1～5, it is characterized in that: the said facility that heats with water vapour comprises to glass cleaning machine to be provided the heating water tank (5) of hot water or the heating water tank (5) of hot water is provided to office's heating system.
7. according to any described natural gas fired incinerators bootstrap system in the claim 1～5, it is characterized in that: the heat transfer element of said heat pipe boiler (1) is a gravity assisted heat pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220171229 CN202581247U (en) | 2012-04-20 | 2012-04-20 | Waste heat utilization system for natural gas burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220171229 CN202581247U (en) | 2012-04-20 | 2012-04-20 | Waste heat utilization system for natural gas burner |
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| Publication Number | Publication Date |
|---|---|
| CN202581247U true CN202581247U (en) | 2012-12-05 |
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ID=47250653
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220171229 Expired - Lifetime CN202581247U (en) | 2012-04-20 | 2012-04-20 | Waste heat utilization system for natural gas burner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202945A (en) * | 2015-07-27 | 2015-12-30 | 南通昊友食品添加剂有限公司 | Waste heat recycling system |
| CN106642080A (en) * | 2016-11-03 | 2017-05-10 | 重庆华万伦生物新能源科技有限公司 | Biomass fuel combustion system adopting design of dual fuel supply |
| CN110285396A (en) * | 2019-07-08 | 2019-09-27 | 河南恒星科技股份有限公司 | Steel curtain line austenite furnace high-temp waste gas recycling system and method |
-
2012
- 2012-04-20 CN CN 201220171229 patent/CN202581247U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202945A (en) * | 2015-07-27 | 2015-12-30 | 南通昊友食品添加剂有限公司 | Waste heat recycling system |
| CN106642080A (en) * | 2016-11-03 | 2017-05-10 | 重庆华万伦生物新能源科技有限公司 | Biomass fuel combustion system adopting design of dual fuel supply |
| CN110285396A (en) * | 2019-07-08 | 2019-09-27 | 河南恒星科技股份有限公司 | Steel curtain line austenite furnace high-temp waste gas recycling system and method |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
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| CX01 | Expiry of patent term |