CN211527119U - Industrial furnace flue gas waste heat recovery heat storage hot water heating system - Google Patents

Abstract

The utility model discloses an industrial furnace flue gas waste heat recovery heat storage hot water heating system, wherein flue gas waste heat recovery equipment is an annular closed cavity body sleeved on a flue gas discharge pipeline, a phase change material heat absorption inner layer and an outer layer heat dissipation channel are arranged in the annular cavity body, the upper end of the heat dissipation channel is provided with a water inlet, the lower end of the heat dissipation channel is provided with a water outlet, and is communicated with a heat storage water tank through a water supply pipeline and a water return pipeline, the lower end of the heat storage water tank is communicated with a tap water supply pipeline, and the upper end; the heat storage water tank, the hot water supply pipeline, the tail end of the heat dissipation device and the heat supply water return pipeline form a heat exchange loop. The utility model has the advantages that: the method can realize the recycling of the flue gas waste heat of the industrial furnace, solve the problems of heating and hot water supply of workshops and auxiliary buildings thereof, and is suitable for factory enterprises with industrial furnaces.

Description

Industrial furnace flue gas waste heat recovery regenerative hot water heating system

technical field

The utility model relates to the field of waste heat utilization of flue gas, in particular to an industrial furnace flue gas waste heat recovery thermal storage hot water heating system.

Background technique

With the rapid development of my country's economy, energy consumption is increasing day by day. Industrial energy consumption accounts for about 70% of social energy consumption. Among them, the waste heat of flue gas accounts for a relatively high proportion. The exhaust temperature of industrial furnace flue gas is too high, which wastes a lot of energy. The waste heat of flue gas in industrial furnaces is recycled and reused to achieve the purpose of energy saving and emission reduction. Recycling waste heat of flue gas is of great significance for energy saving and emission reduction.

At this stage, factories generally use urban heating network central heating, or use electric boilers to heat hot water, or solar energy central heating. In factories, heating costs are huge. Using waste heat from flue gas to heat water for heating can save energy and reduce heating in winter. spending. At the same time, the heated water is directly used, and there is no need to set up a boiler room to boil water, which reduces the initial equipment investment. Therefore, the industrial furnace flue gas waste heat recovery regenerative hot water heating system has broad application prospects.

SUMMARY OF THE INVENTION

In view of the above-mentioned reasons, the purpose of this utility model is to provide an industrial furnace flue gas waste heat recovery thermal storage hot water heating system, which utilizes the flue gas waste heat to heat water so that the water reaches the temperature required for heating and hot water, and then connects to each radiator. It provides heating for the factory, and at the same time solves the demand for hot water in factory bathrooms, and improves the utilization rate of energy.

In order to achieve the above purpose, the technical scheme of the present utility model is: an industrial furnace flue gas waste heat recovery thermal storage hot water heating system, including: flue gas discharge pipeline, flue gas waste heat recovery equipment, hot water storage tank, water supply pipeline and return water pipeline, the flue gas waste heat recovery equipment includes an inner casing, an outer casing, a medium temperature phase change material layer, an upper ring steel plate and a lower ring steel plate, and the medium temperature phase change material layer is arranged outside the flue gas discharge pipe. On the surface, the inner and outer sleeves are sleeved on the flue gas discharge pipe to form a heat dissipation cavity and are located at the medium temperature phase change material layer, and the upper and lower ports of the outer sleeve are located on the sidewall of the heat dissipation cavity and pass through the water supply pipes respectively. The road and the return water pipeline are connected to the hot water storage tank, the lower end of the hot water storage tank is connected to the tap water supply pipe, the upper end of the hot water storage tank is connected to the domestic hot water supply end through the hot water supply pipeline, and the hot water storage tank , The hot water supply pipeline, the end of the cooling equipment, and the heating and return water pipeline form a heat exchange circuit.

Spiral fins are arranged between the inner and outer sleeves.

The hot water supply pipeline is provided with a tap water supply pipe.

The hot water storage tank is a hot water storage tank, and the inner wall of the hot water storage tank is provided with a phase-change heat storage material layer.

The tap water supply pipe is provided with a softening water device and a water pump.

The flue gas discharge pipe is provided with an induced draft fan on the flue gas exhaust pipe at the outlet of the flue gas waste heat recovery equipment.

The hot water supply pipeline is provided with a hot water supply pump.

The return water pipeline is provided with a return water pump.

The hot water storage tank is provided with a solar photovoltaic panel heating device.

The hot water storage tank is connected to the boiler hot water pipeline.

The effect of the utility model is as follows: in terms of flue gas waste heat and heating and heat storage, a hot water storage tank is included to store heated water and maintain stable water supply to the outside. After heating, the high-temperature water enters the factory's hot water supply cycle to heat the factory, realizes the factory's self-sufficiency in winter heating, reduces heating costs in winter, and solves the demand for hot water in factory bathrooms, eliminating the need to set up a boiler room to boil water, reducing initial equipment invest. At the same time, the waste heat of high temperature flue gas is recovered, and the whole system improves the utilization rate of energy.

Description of drawings

1 is a schematic diagram of the utility model industrial furnace flue gas waste heat recovery thermal storage hot water heating system;

Figure 2 is a cross-sectional view of the waste heat recovery equipment from flue gas of the industrial furnace flue gas waste heat recovery thermal storage hot water heating system of the present invention.

FIG. 3 is a top view of the waste heat recovery equipment from flue gas of the industrial furnace flue gas waste heat recovery thermal storage hot water heating system of the present invention.

In the picture:

1. Industrial furnace 2. Flue gas pipeline 3. Flue gas waste heat recovery equipment

4. Induced draft fan 5. Smoke exhaust pipe 6. Water return pipe

7. Water pump 8. Water supply pipeline 9. Hot water storage tank

10. Water pump 11. Hot water supply pipeline 12. Tap water inlet

13. Domestic hot water supply terminal 14. Water pump 15. Hot water supply pipeline

16. The end of the cooling equipment 17. The heating and return water pipeline 18. The tap water supply pipe

19. Water pump 20. Water softening device 21. Tap water inlet

3-1, fins 3-2, outlet pipe 3-3, inlet pipe

3-4, Outer casing 3-5, Upper ring steel plate 3-6, Lower ring steel plate

3-7. Inner casing 3-8. Phase change material layer

Detailed ways

The specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

As shown in Figure 1 and Figure 2, the industrial furnace flue gas waste heat recovery regenerative hot water heating system consists of industrial furnace 1, flue gas pipeline 2, induced draft fan 4, smoke exhaust pipeline 5, flue gas waste heat recovery equipment 3, storage It consists of a hot water tank 9, a water pump 7, a water supply pipeline 8, and a return water pipeline 6. Flue gas waste heat recovery equipment 3 is mainly composed of flue gas pipe 2, fins 3-1, water inlet pipe port 3-2, water outlet pipe port 3-3, outer casing 3-4, upper and lower ring steel plates 3-5, 3 -6, the inner sleeve is composed of 3-7 and the medium temperature phase change material layer 3-8. The medium temperature phase change material layer 3-8 is smeared on the flue gas duct 2, and then the phase change material is sealed with an inner sleeve 3-7. Weld the spiral fin 3-1 to the inner sleeve 3-7, and weld the stainless steel outer sleeve 3-4 to the outer edge of the spiral fin 3-1, between the upper and lower surfaces of the stainless steel outer sleeve 3-4 and the flue gas duct 2 The annular steel plates 3-5 and 3-6 are welded, and the upper part of the flue gas waste heat recovery heat exchange equipment 3 is provided with a water outlet port 3-3 along the tangential direction, and the lower part is provided with a water inlet port 3-2 along the tangential direction. The flue gas generated by the industrial furnace 1 enters the flue gas duct 2, and the flue gas waste heat recovery equipment 3 is flanged to the flue gas duct 2. After cooling, the flue gas is discharged from the exhaust duct 5 through the induced draft fan 4, and the flue gas waste heat recovery equipment 3. The hot water outlet and the top inlet of the hot water storage tank 9 are connected by the water supply pipeline 8, and the high temperature water enters the hot water storage tank 9 after heat exchange. The bottom of the hot water storage tank 9 , the water pump 7 and the low temperature water inlet of the flue gas waste heat recovery device 3 are connected by a return water pipeline 6 . The low-temperature water in the hot water storage tank enters the flue gas waste heat recovery equipment 3 through the water pump 7 to exchange heat with the flue gas. The heating subsystem includes a hot water storage tank 9 , a water pump 14 , a hot water supply pipeline 15 , a heat dissipation device end 16 , and a heating and return water pipeline 17 . The upper part of the high-temperature water of the hot water storage tank 9 enters the end 16 of the heat dissipation device through the water supply pipeline 15 via the water pump 14 . The hot water supply subsystem mainly includes a hot water storage tank 9 , a water pump 10 , a hot water supply pipeline 11 , a tap water inlet 12 , and a domestic hot water supply terminal 13 . The water pump 10 extracts the high temperature water from the upper part of the hot water storage tank 9, and the high temperature water is mixed with tap water and sent to the domestic hot water supply terminal 13 through the hot water supply pipeline 11 for use. The tap water replenishment subsystem mainly includes a tap water inlet 21 , a softening water device 20 , a water pump 19 , a tap water supply pipe 18 and a hot water storage tank 9 . The main purpose is to supply softened water to the hot water storage tank 9 to supplement part of the water used by the domestic hot water supply terminal 13 .

In winter conditions, the flue gas generated by the industrial furnace 1 enters the flue gas duct 2, and the flue gas and water exchange heat in the flue gas waste heat recovery equipment 3 on the flue gas duct 2. After cooling, the flue gas passes through the induced draft fan 4 from the flue gas exhaust duct. 5 is discharged to the outside, the heated water enters the hot water storage tank 9, and the low-temperature water in the hot water storage tank 9 enters the flue gas waste heat recovery equipment 3 through the water pump 7 to exchange heat with the flue gas. In the heating subsystem, the upper part of the high-temperature water of the hot water storage tank 9 enters the end 16 of the cooling device through the water pump 14 , and the low-temperature water joins and flows back into the bottom of the hot water storage tank 9 after heat dissipation. In the hot water supply subsystem, the water pump 10 extracts the high temperature water from the upper part of the hot water storage tank 9, and the high temperature water is mixed with tap water and sent to the domestic hot water supply terminal 13 for use. The tap water replenishment subsystem mainly replenishes water to the hot water storage tank 9 and replenishes part of the water used by the hot water supply terminal 13 .

In summer working conditions, the flue gas generated by the industrial furnace 1 enters the flue gas duct 2, and the flue gas and water exchange heat in the flue gas waste heat recovery equipment 3 on the flue gas duct 2. After cooling, the flue gas passes through the induced draft fan 4 from the flue gas exhaust duct. 5 is discharged to the outside, the heated water enters the hot water storage tank 9, and the low-temperature water in the hot water storage tank 9 enters the flue gas waste heat recovery equipment 3 through the water pump 7 to exchange heat with the flue gas. The heating subsystem stops working. In the hot water supply subsystem, the water pump 10 extracts the high temperature water from the upper part of the hot water storage tank 9, and the high temperature water is mixed with tap water and sent to the domestic hot water supply terminal 13 for use. The tap water replenishment subsystem mainly replenishes water to the hot water storage tank 9 to replenish part of the water used by the domestic hot water supply terminal 13 .

Claims (10)

1. The utility model provides an industrial furnace flue gas waste heat recovery heat accumulation hot water heating system, includes: flue gas discharge pipeline, flue gas waste heat recovery equipment, heat storage water tank, water supply pipe and return water pipeline, characterized by: flue gas waste heat recovery equipment includes interior sleeve pipe, outer tube, phase change material layer, goes up ring steel sheet and lower ring steel sheet, phase change material layer sets up at flue gas discharge pipeline surface, interior sleeve pipe, outer tube cover form the heat dissipation cavity on flue gas discharge pipeline and are located middle temperature phase change material layer department, the last port of outer tube, lower port all are located the lateral wall of heat dissipation cavity and communicate with heat storage water tank through supply line and return water pipeline respectively, heat storage water tank lower extreme intercommunication running water supply pipe, the heat storage water tank upper end is passed through hot water supply pipeline intercommunication life hot water supply end, heat storage water tank, hot water supply pipeline, heat dissipation equipment end, heat supply return water pipeline form heat transfer return circuit.

2. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 1, wherein: and spiral fins are arranged between the inner sleeve and the outer sleeve.

3. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 1, wherein: the hot water supply pipeline is provided with a tap water replenishing pipe.

4. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 1, wherein: the heat storage water tank is a heat storage water tank, and the inner wall of the heat storage water tank is provided with a phase change heat storage material layer.

5. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 1, wherein: the tap water supply pipe is provided with a water softening device and a water pump.

6. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 1, wherein: and the smoke discharge pipeline is provided with a draught fan on a smoke discharge pipeline at the outlet of the smoke waste heat recovery device.

7. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 2, characterized in that: and a hot water supply pump is arranged on the hot water supply pipeline.

8. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 1, wherein: and a return water pump is arranged on the return water pipeline.

9. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 1, wherein: the heat storage water tank is provided with a solar photovoltaic panel heating device.

10. The industrial furnace flue gas waste heat recovery heat storage hot water heating system as claimed in claim 1, wherein: the heat storage water tank is communicated with a boiler hot water pipeline.

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