Village and town household garbage incineration waste heat heating system

Abstract

The utility model discloses a rural and town household garbage incineration waste heat heating system which comprises a garbage incinerator, a flue arranged on the garbage incinerator and connected with a high-temperature flue gas outlet of the garbage incinerator, an external heat remover laid in the flue, and a steam waste heat boiler and a hot water waste heat boiler which are connected with the flue in parallel. And the flue gas purifier is connected with the steam waste heat boiler and the hot water waste heat boiler. A boiler water producer is arranged between the flue on the external heat collector and the steam waste heat boiler, and a circulating cooler is arranged between the flue on the external heat collector and the hot water waste heat boiler. And the external cooler is connected with the heat preservation water tank. High-temperature flue gas passes through the flue and then enters the steam waste heat boiler and the hot water waste heat boiler. The utility model has the advantages of environmental protection, economy and popularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to organic solid waste disposal equipment field, especially relate to a township domestic waste incineration waste heat heating system. BACKGROUND

[0002] After decades of development, the main disposal means of domestic waste in China is gradually changed from traditional sanitary landfill to incineration power generation, supplemented by landfill and sorting. The disposal scale of township domestic waste is usually small, and the amount of waste heat resource generated by waste incineration is very limited, which does not reach the threshold of waste heat power generation, and the demand for heat energy utilization is not stable, resulting in that the township domestic waste incineration waste heat resource cannot be effectively utilized, and most of the waste heat is directly discharged, which causes the poor economy of township domestic waste incineration project and hinders the popularization of township domestic waste technology. SUMMARY

[0003] In view of the above problems, the purpose of the utility model is to provide an environmentally friendly and economical township domestic waste incineration waste heat heating system.

[0004] To achieve the above purpose, the utility model provides a township domestic waste incineration waste heat heating system, which is characterized by comprising a waste incinerator, a flue connected with the high-temperature flue gas outlet of the waste incinerator, an external heat exchanger laid in the flue, and a steam waste heat boiler and a hot water waste heat boiler connected in parallel with the flue. A flue gas purifier is connected with the steam waste heat boiler and the hot water waste heat boiler. A boiler water maker is arranged between the flue of the external heat exchanger and the steam waste heat boiler, and a circulating cooler is arranged between the flue of the external heat exchanger and the hot water waste heat boiler. The external heat exchanger is connected with a heat preservation water tank. The high-temperature flue gas enters the steam waste heat boiler and the hot water waste heat boiler after passing through the flue.

[0005] In some embodiments, a three-way regulating valve is arranged between the steam waste heat boiler and the hot water waste heat boiler and the flue gas purifier.

[0006] In some embodiments, water is produced by the high-temperature flue gas in the flue after passing through the boiler water maker, and the steam is formed by entering the steam waste heat boiler. The steam is transported by long-distance heat energy or directly utilized on site.

[0007] In some embodiments, the high-temperature flue gas in the flue enters the hot water waste heat boiler after passing through the circulating cooler to produce hot water, and then returns to the circulating cooler for heat dissipation.

[0008] In some embodiments, the flue comprises a high-temperature resistant layer, a heat preservation material and a steel plate layer from inside to outside. The high-temperature resistant layer is refractory brick or refractory castable. The heat preservation material is heat preservation cotton.

[0009] In some embodiments, the external heat exchanger comprises a serpentine tube bundle arranged between the high-temperature resistant layer and the thermal insulation material, and a gap formed between the inner wall of the serpentine tube bundle and the high-temperature resistant layer. The gap is filled with water or tap water that exchanges heat with the high-temperature flue gas flowing through the high-temperature resistant layer.

[0010] In some embodiments, the thermal insulation water tank is connected to a heating structure and a hot water bathing device, respectively. The heating structure is a radiator. The hot water bathing device is a shower head.

[0011] In some embodiments, a circulating pump is arranged between the thermal insulation water tank and the radiator and the shower head to provide power. The inlet of the radiator is connected to the circulating pump, and the outlet of the radiator is connected to the external heat exchanger.

[0012] The utility model discloses beneficial effect is with environmental protection and economic, and utilize in popularization effect. Since the utility model puts forward a kind of combined structure suitable for small-sized domestic waste incineration system heat energy utilization, it is convenient to carry out township domestic waste incineration waste heat resource multipurpose mode exploration and practice. Specifically is: first, through the reuse of the waste heat resource generated after domestic waste incineration, the multipurpose mode of hot water and steam can be realized: from the water quality, it can satisfy the different needs of heating, bathing and the like; from distance, it can satisfy the nearby hot water supply and long-distance steam supply; from utilization mode, it can satisfy the direct utilization of hot water and the direct and indirect application of steam; from heat demand characteristics, it can satisfy the continuous heat energy demand and intermittent heat demand;Second, the system is mainly composed of outer heat extractor, steam waste heat boiler and hot water waste heat boiler; wherein, outer heat extractor mainly provides bathing hot water and heating hot water to outside; steam boiler mainly provides steam supply to outside; it also can guarantee the stable operation of flue gas purifier, and it is more beneficial to popularization. Third, according to the different water quality requirements of outer heat extractor, steam waste heat boiler and hot water waste heat boiler, reasonable water replenishment mode is formulated: wherein, when outer heat extractor supplies bathing hot water and heating hot water, water quality should be kept clean and sanitary, therefore, outer heat extractor replenishes water by using tap water; when the hot water supply amount of outer heat extractor is not large, or water temperature is too high, to guarantee water quality and water temperature stability, it needs to discharge a certain amount of hot water periodically, and replenish fresh tap water; when the hot water discharged by outer heat extractor is distributed to boiler water maker, the hot water is desalted, softened and deoxygenated by boiler water maker, thereby guaranteeing the safe operation of steam waste heat boiler and the supply of clean steam; when the hot water discharged by outer heat extractor is distributed to boiler water maker, since hot water waste heat boiler and circulating cooler do not have high water quality requirements, they can easily consume the part of hot water, and effectively dissipate the heat of hot water. Fourth, outer heat extractor is arranged on the flue of incinerator outlet, and is arranged between refractory castable and insulation layer of flue, and the structure design has the following advantages: 1) since garbage incineration flue gas contains a large amount of HCl, HF, SOx, and has strong corrosiveness, the structure can avoid the direct contact of outer heat extractor tube bundle and garbage incineration high-temperature flue gas, and prevent high-temperature corrosion of tube bundle; 2) since garbage ash has low melting point, a large amount of molten fly ash is carried in high-temperature flue gas, the structure can avoid coking and ash deposition outside heat exchange tube bundle, and avoid the need of frequent soot blowing; 3) the heat exchange efficiency of outer heat extractor tube bundle is controlled, the tube bundle wall temperature is effectively reduced, local over-temperature gasification in heat exchange tube is avoided, and the possibility of over-temperature of outer heat extractor tube bundle is also avoided; 4) the heat loss of hot water in tube bundle is prevented by using external insulation of insulation cotton. In this way, environmental protection and economy are realized, and popularization effect is utilized. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The block flow chart of the utility model;

[0014] Figure 2 for Figure 1 the extension view of the external heat exchanger and the heat preservation water tank;

[0015] Figure 3 for Figure 1 the longitudinal sectional structure diagram of the flue and the external heat exchanger

[0016] Figure 4 for Figure 1 the structure diagram of the external heat exchanger;

[0017] Figure 5 for Figure 1 the overhead structure diagram of the external heat exchanger. DETAILED DESCRIPTION

[0018] The utility model will be further explained in detail in combination with the drawings.

[0019] As Figures 1-5As shown, a kind of township domestic waste incineration waste heat heating system, including garbage incinerator 1, in garbage incinerator 1 It is provided with the flue 2 connected with the high-temperature flue gas outlet of garbage incinerator 1, the outer heat exchanger 3 laid in the flue 2, and the steam waste heat boiler 4 and hot water waste heat boiler 5 connected with the flue 2 in parallel.The flue gas purifier 6 connected with the steam waste heat boiler 4 and hot water waste heat boiler 5 of the described, the flue 2 between the outer heat exchanger 3 and the steam waste heat boiler 4 is provided with boiler water maker 7, the flue 2 between the outer heat exchanger 3 and the hot water waste heat boiler 5 is provided with circulating cooler 8, and the outer heat exchanger 3 is connected with heat preservation water tank 10.High-temperature flue gas enters steam waste heat boiler 4 and hot water waste heat boiler 5 after flue 2 respectively.The three-way regulating valve is arranged between steam waste heat boiler 4 and hot water waste heat boiler 5 and flue gas purifier 6.The high-temperature flue gas in flue 2 produces water after boiler water maker 7 and enters steam waste heat boiler 4 to form steam.Steam long-distance heat energy transport or in situ steam direct utilization.The high-temperature flue gas in flue 2 enters hot water waste heat boiler 5 to produce hot water after circulating cooler 8, and then returns to circulating cooler 8 to carry out heat dissipation, so as to play the role of adjusting system heat, and provide stable flue gas temperature guarantee for subsequent flue gas purifier 6.The flue 2 includes high-temperature resistant layer 21, heat preservation material 22 and steel plate layer 23 from inside to outside, and provides fireproof and heat insulation function for high-temperature flue gas.The high-temperature resistant layer 21 is refractory brick or refractory castable.The heat preservation material 22 is heat preservation cotton.The outer heat exchanger 3 includes serpentine tube bundle 31 laid between high-temperature resistant layer 21 and heat preservation material 22, and gap 32 formed between the inner wall of serpentine tube bundle and high-temperature resistant layer 21.Water or tap water flowing through the high-temperature flue gas in high-temperature resistant layer 21 is introduced into gap 32 to exchange heat.The heat preservation water tank 10 is connected with heating structure and hot water bathing device respectively.The heating structure is radiator.The hot water bathing device is shower head.The circulating pump 9 providing power is arranged between heat preservation water tank 10 and radiator and shower head.The water inlet end of radiator is connected with circulating pump, and the water outlet end is connected with outer heat exchanger 3.

[0020] Working principle:

[0021] The high-temperature flue gas generated by the waste incinerator 1 enters the steam waste heat boiler 4 and the hot water waste heat boiler 5 through the flue 2. When the high-temperature flue gas passes through the flue 2, the flue gas heat passes through the refractory layer and exchanges heat with the water in the pipe bundle of the external heat exchanger 3. The water temperature rises and is transported to the heat preservation water tank 10 under the action of the pipe pressure. Then the water is heated again in the external heat exchanger 3 through the circulating pump of the heat preservation water tank 10, so as to realize the generation of hot water in the heat preservation water tank 10. After the high-temperature flue gas passes through the flue 2, it enters the steam waste heat boiler 4 and the hot water waste heat boiler 5 in two ways. The waste heat of the high-temperature flue gas is converted into steam generated by the steam waste heat boiler 4 and hot water generated by the hot water waste heat boiler 5 in the steam waste heat boiler 4 and the hot water waste heat boiler 5. At this time, the flue gas after waste heat recovery is discharged from the steam waste heat boiler 4 and the hot water waste heat boiler 5, and then is combined after passing through the adjusting valve and enters the flue gas purifier 6. The softened water generated by the boiler water generator 7 is converted into steam after heat exchange with the high-temperature flue gas in the steam waste heat boiler 4. The steam is discharged from the steam waste heat boiler 4 when the steam temperature and pressure parameters reach the set value, and is transported to the steam heat user through the pipe network. The circulating water provided by the circulating cooler 8 is converted into hot water after heat exchange with the high-temperature flue gas in the hot water waste heat boiler 5. The hot water is discharged from the hot water waste heat boiler 5 and is transported to the circulating cooler 8 for heat dissipation and cooling. The flue gas waste heat is orderly dissipated to the atmosphere. The hot water generated by the external heat exchanger 3 is transported to the heating hot water pipe network of the heating user and the shower hot water pipe network system of the bathing user. The return water of the heating hot water pipe network is transported to the external heat exchanger 3 for heating and then is circulated into the heating pipe network system, so as to realize the heating application of the waste heat resource. When the steam waste heat boiler 4, the softened water boiler water generator 7 and the hot water waste heat boiler 5 circulating cooler 8 need to be replenished, the heating and bathing hot water pipe network is preferentially selected, so as to maintain the cleanliness of the water in the heating pipe and the bathing pipe network. When the water temperature in the heating and bathing hot water pipe network exceeds the set value, the hot water is preferentially discharged into the boiler water generator 7 and the hot water waste heat boiler 5 circulating cooler 8 as the replenishment, and fresh tap water is supplemented into the heating and bathing hot water pipe network as the supplement, so as to control the water temperature in the heating and bathing hot water pipe network to maintain at the set temperature. The hot water waste heat boiler 5 is mainly used for adjusting the system heat and ensuring the stable operation of the subsequent flue gas purifier 6. When the bathing hot water demand, heating demand or steam demand decreases, the flue gas heat energy is converted into a large amount of hot water through the adjustment of the flue gas adjustment and water replenishment, and is naturally dissipated in the environment through the circulating cooler 8. When the bathing hot water demand, heating demand or steam demand increases, the amount of flue gas entering the hot water waste heat boiler 5 decreases, the amount of circulating cooling water decreases, and the amount of heat naturally dissipated by the system also decreases.

[0022] The above only describes some embodiments of the present application. Those skilled in the art can make some modifications and improvements without departing from the inventive concept, and these modifications and improvements are within the protection scope of the present application.

Claims

1. A township household garbage incineration waste heat heating system, characterized in that, The application relates to a waste incinerator, which comprises a waste incinerator, a flue connected with a high-temperature flue gas outlet of the waste incinerator, an external heat exchanger arranged in the flue, a steam waste heat boiler and a hot water waste heat boiler connected in parallel with the flue, and a flue gas purifier connected with the steam waste heat boiler and the hot water waste heat boiler. The flue gas purifier is connected with the steam waste heat boiler and the hot water waste heat boiler. A boiler water maker is arranged between the flue of the external heat exchanger and the steam waste heat boiler. A circulating cooler is arranged between the flue of the external heat exchanger and the hot water waste heat boiler. The external heat exchanger is connected with a heat preservation water tank. The high-temperature flue gas enters the steam waste heat boiler and the hot water waste heat boiler through the flue.

2. The system according to claim 1, characterized in that, The steam waste heat boiler and the hot water waste heat boiler are provided with a three-way regulating valve between the flue gas purifier.

3. The system according to claim 1, characterized in that, The high-temperature flue gas in the flue produces water through the boiler water maker, and the water forms steam in the steam waste heat boiler; the steam is used for remote heat energy transmission or direct steam utilization.

4. The system according to claim 1, characterized in that, The high-temperature flue gas in the flue produces hot water through the circulating cooler, and then the hot water is returned to the circulating cooler for heat dissipation.

5. The system according to claim 1, characterized in that, The flue comprises a high-temperature resistant layer, heat preservation material and a steel plate layer from inside to outside. The high-temperature resistant layer is refractory brick or refractory castable. The heat preservation material is heat preservation cotton.

6. The system according to claim 5, characterized in that, The external heat exchanger comprises a serpentine pipe bundle arranged between the high-temperature resistant layer and the heat preservation material, and a gap formed between the inner wall of the serpentine pipe bundle and the high-temperature resistant layer. Water or tap water flowing through the high-temperature resistant layer is introduced into the gap to exchange heat.

7. The system according to claim 1, characterized in that, The heat preservation water tank is connected with a heating structure and a hot water bathing device. The heating structure is a heating radiator. The hot water bathing device is a bathing shower.

8. The system according to claim 7, characterized in that, A circulating pump is arranged between the heat preservation water tank, the heating radiator and the bathing shower to provide power. The water inlet end of the heating radiator is connected with the circulating pump, and the water outlet end is connected with the external heat exchanger.

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