Heat energy recycling system

Abstract

The utility model relates to a heat energy recycling system which comprises an energy-saving shell and a heat exchange tube bundle and is technically characterized in that a longitudinal partition plate is arranged in the energy-saving shell, an inner cavity of the energy-saving shell is divided into a left smoke passing space and a right smoke passing space by the longitudinal partition plate, and a supporting hole group corresponding to the heat exchange tube bundle is arranged on the longitudinal partition plate. Smoke inlets in one-to-one correspondence with the smoke passing spaces are formed in the front side wall of the energy-saving shell, first switching valves are arranged at the smoke inlets, a purging assembly is arranged at the top of the energy-saving shell, a dust collecting hopper is arranged at the bottom of the energy-saving shell, and a control valve is arranged on the lower portion of the dust collecting hopper; smoke outlets in one-to-one correspondence with the smoke passing spaces are formed in the rear side wall of the energy-saving shell, second switching valves are arranged at the smoke outlets, the outlet end of the heat exchange tube bundle is connected with the energy storage water tank through a pipeline, a water storage inner container is arranged in the energy storage water tank, and a heat preservation cavity is formed between the water storage inner container and the energy storage water tank. The system solves the problem that the heat exchange efficiency is low due to dust accumulation in an existing energy saver, and meanwhile the waste heat utilization rate is remarkably increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy recycling technical field, concretely relates to a heat energy recycling system for the recovery of flue gas heat. BACKGROUND

[0002] The boiler for production or life will emit a large amount of flue gas when burning, and a large amount of waste heat is discharged with the flue gas, which causes the heat efficiency of the boiler to decrease. Therefore, an economizer is usually arranged on the flue gas outlet pipeline of the boiler to avoid waste of heat energy. The existing economizer is generally composed of a shell and heat exchange tube bundles arranged in the shell.

[0003] However, during the passage of the flue gas, the heat exchange tube bundles in the economizer will have the phenomenon of ash deposition, which will greatly affect the heat exchange efficiency after long-term deposition. SUMMARY

[0004] The utility model aims at providing a heat energy recycling system which is reasonable in structure and reliable in use, and solves the problem of low heat exchange efficiency caused by ash deposition in the existing economizer, and significantly improves the waste heat utilization rate.

[0005] The technical scheme of the utility model is as follows:

[0006] A heat energy recycling system comprises an economizer shell for communication with the flue gas outlet of a boiler, and heat exchange tube bundles arranged in the economizer shell, and the technical key points are as follows: a longitudinal partition plate is arranged in the economizer shell, and the longitudinal partition plate divides the inner cavity of the economizer shell into left and right flue gas passing spaces; support holes corresponding to the heat exchange tube bundles are arranged on the longitudinal partition plate; a flue gas inlet corresponding to each flue gas passing space is arranged on the front side wall of the economizer shell, and a first switching valve is arranged at the flue gas inlet; a blowing assembly corresponding to each flue gas passing space is arranged on the top of the economizer shell; a dust collector corresponding to each flue gas passing space is arranged on the bottom of the economizer shell; a control valve is arranged on the lower part of the dust collector; a flue gas outlet corresponding to each flue gas passing space is arranged on the rear side wall of the economizer shell, and a second switching valve is arranged at the flue gas outlet; the outlet end of the heat exchange tube bundles is connected to an energy storage water tank through a pipeline; a water storage liner is arranged in the energy storage water tank; and a heat preservation cavity is formed between the water storage liner and the energy storage water tank.

[0007] The heat energy recycling system has the following features: a filter is arranged at the outlet of the second switching valve; a shunt valve is arranged at the outlet of the filter; one outlet of the shunt valve is connected to the heat preservation cavity of the energy storage water tank through a pipeline; and a flue gas outlet communicating with the heat preservation cavity is arranged on the bottom of the energy storage water tank.

[0008] The heat energy recycling system has the following features: the water storage liner is provided with a water inlet pipeline communicating with the heat exchange tube bundles; a water supplement branch is arranged on the water inlet pipeline; a water supplement valve is arranged on the water supplement branch; and a water outlet pipeline is additionally arranged on the upper part of the water storage liner.

[0009] In the aforementioned heat energy recovery and utilization system, the heat exchange tube bundle is a serpentine tube bundle.

[0010] The beneficial effects of this utility model are:

[0011] 1. Two flue gas passages are used to switch between exhaust and heat exchange. In the non-exhaust flue gas passage, the smoke and ash falling on the heat exchange tube bundle are blown away by the purging component to avoid long-term accumulation. This solves the problem of low heat exchange efficiency caused by ash accumulation inside the existing energy-saving device and improves heat exchange efficiency.

[0012] 2. By utilizing the energy storage water tank for heat storage and the filter flue gas in the insulation cavity for heat preservation, the waste heat utilization rate is significantly improved. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a side view of the energy-saving casing of this utility model.

[0015] In the diagram: 1. Purge assembly, 2. Energy-saving shell, 3. Smoke inlet, 4. First switching valve, 5. Longitudinal baffle, 6. Heat exchange tube bundle, 7. Ash hopper, 8. Smoke outlet, 9. Filter, 10. Diverter valve, 11. Energy storage tank, 12. Drainage pipe, 13. Water storage tank, 14. Smoke outlet, 15. Pipeline, 16. Water supply valve, 17. Water supply branch, 18. Pipeline, 19. Outlet end. Detailed Implementation

[0016] The present invention will be described in detail with reference to the accompanying drawings.

[0017] like Figure 1 , Figure 2 As shown, the heat energy recovery and utilization system includes an energy-saving shell 2 for communication with the boiler flue gas outlet and a heat exchange tube bundle 6 disposed in the energy-saving shell 2.

[0018] The energy-saving shell 2 is provided with a longitudinal partition 5, which divides the inner cavity of the energy-saving shell 2 into two smoke passages, left and right. The longitudinal partition 5 is provided with a set of support holes corresponding to the heat exchange tube bundle 6.

[0019] The front side wall of the energy-saving shell 2 is provided with a smoke inlet 3 corresponding to the smoke ventilation space, and a first switching valve 4 is provided at the smoke inlet 3. The top of the energy-saving shell 2 is provided with a purging assembly 1 corresponding to the smoke ventilation space, and the bottom of the energy-saving shell 2 is provided with a dust collection hopper 7 corresponding to the smoke ventilation space. A control valve is provided at the lower part of the dust collection hopper 7.

[0020] The rear wall of the energy-saving shell 2 is provided with a smoke exhaust port 8 corresponding to each smoke passing space, and the second switch valve is arranged at the smoke exhaust port 8. In the embodiment, the outlet of the second switch valve is provided with a filter 9, the outlet of the filter 9 is provided with a shunt valve 10, one outlet of the shunt valve 10 is communicated with a heat preservation cavity of an energy storage water tank 11 through a pipeline 18, and the bottom of the energy storage water tank 11 is provided with a smoke exhaust port 14 communicated with the heat preservation cavity.

[0021] The outlet end 19 of the heat exchange pipe bundle 6 is connected with the energy storage water tank 11 through a pipeline 15, the energy storage water tank 11 is provided with a water storage inner container 13, and a heat preservation cavity is formed between the water storage inner container 13 and the energy storage water tank 11. In the embodiment, the water storage inner container 13 is provided with a water inlet pipeline communicated with the heat exchange pipe bundle 6, the water inlet pipeline is provided with a water supplement branch 17, the water supplement branch 17 is provided with a water supplement valve 16, and the water storage inner container 13 is further provided with a water outlet pipeline 12 at the upper portion. The heat exchange pipe bundle 6 is a serpentine pipe bundle.

[0022] Working principle:

[0023] In use, one smoke passing space receives flue gas, and the heat exchange pipe bundle 6 absorbs heat, and the water flowing through the heat exchange pipe bundle 6 is injected into the energy storage water tank 11 to store heat. After working for a period of time, another smoke passing space receives flue gas, and the previous smoke passing space blows off the ash to fall into the ash collecting hopper 7 for discharge by using the blowing assembly 1. In this way, on the one hand, the working efficiency is not affected, and on the other hand, the ash accumulation in the energy-saving device is avoided, so that the heat exchange efficiency is low. The heat preservation cavity of the energy storage water tank 2 is communicated with the filtered flue gas to realize heat preservation and improve the waste heat utilization rate of the flue gas.

[0024] The above embodiment of the utility model is described in detail, but the content is only the preferred embodiment of the utility model, and cannot be considered as limiting the scope of the utility model. Any equivalent change and improvement within the scope of the utility model is still within the scope of the patent.

Claims

1. A heat energy recovery system comprising an economizer shell for communicating with a boiler flue gas outlet, a heat exchange tube bundle arranged in the economizer shell, characterized in that: The energy-saving shell is provided with a longitudinal partition plate, and the inner cavity of the energy-saving shell is divided into left and right smoke passing spaces by the longitudinal partition plate, the longitudinal partition plate is provided with a support hole group corresponding to the heat exchange pipe bundle, the front side wall of the energy-saving shell is provided with a smoke inlet corresponding to the smoke passing space, and the smoke inlet is provided with a first switch valve; the top of the energy-saving shell is provided with a blowing assembly corresponding to the smoke passing space; the bottom of the energy-saving shell is provided with an ash collecting hopper corresponding to the smoke passing space, and the lower part of the ash collecting hopper is provided with a control valve; the rear side wall of the energy-saving shell is provided with a smoke outlet corresponding to the smoke passing space, and the smoke outlet is provided with a second switch valve; the outlet end of the heat exchange pipe bundle is connected with an energy storage water tank by a pipeline; and the energy storage water tank is provided with a water storage liner, and a heat preservation cavity is formed between the water storage liner and the energy storage water tank.

2. The thermal energy recovery system of claim 1, wherein: The outlet of the second switch valve is provided with a filter, the outlet of the filter is provided with a shunt valve, one outlet of the shunt valve is connected with the heat preservation cavity of the energy storage water tank by a pipeline, and the bottom of the energy storage water tank is provided with a smoke outlet communicated with the heat preservation cavity.

3. The thermal energy recovery system of claim 1, wherein: The water storage liner is provided with a water inlet pipeline communicated with the heat exchange pipe bundle, the water inlet pipeline is provided with a water supplement branch, the water supplement branch is provided with a water supplement valve, and the upper part of the water storage liner is additionally provided with a water outlet pipeline.

4. The thermal energy recovery system of claim 1, wherein: The heat exchange pipe bundle is a serpentine pipe bundle.

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