A horizontal continuous charging electric furnace feeding cover cooling water waste heat utilization system

Abstract

The utility model relates to the energy recovery technical field of steel smelting industry, concretely is a kind of horizontal continuous feeding electric furnace feed cover cooling water waste heat utilization system, including sewage source heat pump unit, heating side circulating unit and sewage source side circulating unit.The utility model passes through horizontal continuous feeding electric furnace feed cover cooling water first through the water distribution of distribution reservoir, enters sewage source side circulating pump after heat exchange in sewage source heat pump unit, and the hot water prepared is divided to each user point after being punched into distribution reservoir by heating side circulating pump.In addition, considering that the cooling water burst of horizontal continuous feeding electric furnace feed cover cannot meet the heat exchange demand, adopts standby well water, steam, other cooling water system water source, other underground water source, electric auxiliary heating and the like as standby heat source, guarantees the continuous stable operation of heating system.

Description

Technical Field

[0001] This utility model relates to the field of energy recovery technology in the iron and steel smelting industry, specifically a waste heat utilization system for the cooling water of a horizontal continuous feeding electric furnace feeding hood. Background Technology

[0002] Currently, the cooling water for the feed hood of a horizontally continuously fed electric arc furnace is transported through pipelines to a cooling tower for direct heat exchange and cooling. This technology results in a relatively high inlet temperature of the cooling water, leading to a large cooling tower system design, a large footprint, a heavy workload for equipment operation and maintenance, and a significant overall investment. Furthermore, it causes a certain degree of heat loss and environmental thermal pollution. In addition, the continuity of the cooling water supply to the feed hood of the existing horizontally continuously fed electric arc furnace is affected by process operation and maintenance, resulting in unstable heat exchange.

[0003] In view of this, this utility model is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a waste heat utilization system for the cooling water of a horizontal continuous feeding electric furnace feeding hood, so as to solve the technical problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A waste heat utilization system for cooling water of a horizontal continuous feeding electric furnace feeding hood includes a sewage source heat pump unit, a heating-side circulation unit, and a sewage source-side circulation unit.

[0007] The heating-side circulation unit includes a heating-side water supply pipe, a first manifold, a heating-side return water pipe, a second manifold, and a heating-side circulation pump. The heating-side water supply pipe enters the wastewater source heat pump unit via the first manifold and the heating-side circulation pump, and the heating-side return water pipe flows out from the wastewater source heat pump unit via the heating-side circulation pump and the second manifold.

[0008] The wastewater source circulation unit includes a wastewater source side water supply pipe, a third water manifold, a wastewater source side return water pipe, a fourth water manifold, and a wastewater source side circulation pump. The wastewater source side water supply pipe enters the wastewater source heat pump unit through the third water manifold and the wastewater source side circulation pump, and the wastewater source side return water pipe flows out from the wastewater source heat pump unit through the wastewater source side circulation pump and the fourth water manifold.

[0009] Preferably, there are two sets of wastewater source heat pump units, which operate simultaneously or serve as redundancies for each other.

[0010] Preferably, the wastewater source-side water supply pipe passes through a cyclone separator before entering the third manifold.

[0011] Preferably, the heating-side water supply pipe passes through a vortex separator before entering the first manifold.

[0012] Preferably, it also includes a water replenishment unit, which includes a water replenishment inlet pipe, a water replenishment tank, and a constant pressure water replenishment device. The water replenishment inlet pipe flows into the water replenishment tank and the constant pressure water replenishment device in sequence before flowing into the first water distributor.

[0013] Preferably, it also includes a standby side circulation unit, which includes a standby side water supply pipe, a fifth manifold, a standby side return water pipe, and a sixth manifold; the standby side water supply pipe enters the sewage source heat pump unit through the fifth manifold and the heating side circulation pump, and the standby side return water pipe flows out from the sewage source heat pump unit through the heating side circulation pump and the sixth manifold.

[0014] Preferably, the backup water supply pipe passes through a cyclone separator before entering the fifth water distribution unit.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Fully utilize the waste heat from the cooling water of the horizontal continuous feeding electric furnace's feeding hood to raise the water temperature through the heat pump technology of the water source heat pump unit's evaporator for various heat-consuming scenarios.

[0017] 2. The water temperature boosted by the heat pump can be used to preheat the feed water of the waste heat boiler, improving the efficiency of the waste heat boiler system and further enhancing the overall system's thermal energy utilization rate. It can also be applied to other processes that require preheating to achieve the most efficient thermal energy utilization.

[0018] 3. It replaces traditional heat exchange processes, reduces the loss of other heat exchange energy (steam, coal, etc.), and allows for multi-purpose use of the heat energy after heat exchange (heating, bathing, etc.). The surplus energy in the factory area can be sold to nearby residential areas for heating, bathing, etc., achieving better environmental protection and economic benefits.

[0019] 4. Utilizing the large cooling water volume and low water temperature (estimated range of 15-25℃ in winter) of the horizontal continuous feeding electric furnace feeding hood, the heat exchange temperature difference can be small (5-10℃), making it suitable for various cooling water temperature conditions.

[0020] 5. Effectively utilize the waste heat of the cooling water in the feeding hood of the horizontal continuous feeding electric furnace, reduce the thermal pollution caused by the waste heat emission of the cooling water in the feeding hood of the horizontal continuous feeding electric furnace, and reduce the equipment investment of the circulating water cooling tower.

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the planar structure of a waste heat utilization system for cooling water in a horizontal continuous feeding electric furnace feeding hood, provided for an embodiment of this utility model.

[0023] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0024] 1. Wastewater source heat pump unit; 2. Heating side circulating pump; 3. Wastewater source side circulating pump; 4. First manifold; 5. Second manifold; 6. Makeup water tank; 7. Constant pressure water makeup device; 8. Cyclone sand separator; 9. Cyclone dirt separator; 10. Third manifold; 11. Fourth manifold; 12. Fifth manifold; 13. Sixth manifold; 14. Heating side supply pipe; 15. Heating side return pipe; 16. Wastewater source side supply pipe; 17. Wastewater source side return pipe; 18. Makeup water inlet pipe; 19. Standby side supply pipe; 20. Standby side return pipe. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Please see Figure 1 The present invention provides a waste heat utilization system for cooling water of a horizontal continuous feeding electric furnace feeding hood, comprising a sewage source heat pump unit 1, a heating-side circulation unit and a sewage source-side circulation unit;

[0027] The heating-side circulation unit includes a heating-side water supply pipe 14, a first manifold 4, a heating-side return water pipe 15, a second manifold 5, and a heating-side circulation pump 2. The heating-side water supply pipe 14 enters the wastewater source heat pump unit 1 via the first manifold 4 and the heating-side circulation pump 2, and the heating-side return water pipe 15 flows out of the wastewater source heat pump unit 1 via the heating-side circulation pump 2 and the second manifold. In addition, the heating-side water supply pipe 14 passes through a cyclone separator 9 before entering the first manifold 4.

[0028] The wastewater source circulation unit includes a wastewater source-side supply pipe 16, a third manifold 10, a wastewater source-side return pipe 17, a fourth manifold 11, and a wastewater source-side circulation pump 3. The wastewater source-side supply pipe 16 enters the wastewater source heat pump unit 1 via the third manifold 10 and the wastewater source-side circulation pump 3. The wastewater source-side return pipe 17 flows out of the wastewater source heat pump unit 1 via the wastewater source-side circulation pump 3 and the fourth manifold. Furthermore, the wastewater source-side supply pipe 16 passes through a cyclone separator 8 before entering the third manifold 10.

[0029] In this utility model, there are two sets of sewage source heat pump units 1, which operate simultaneously or serve as backups for each other.

[0030] In a preferred embodiment of the present invention, the waste heat utilization system for cooling water of the horizontal continuous feeding electric furnace feeding hood further includes a water replenishment unit. The water replenishment unit includes a water replenishment inlet pipe 18, a water replenishment tank 6, and a constant pressure water replenishment device 7. The water replenishment inlet pipe 18 enters the water replenishment tank 6 and the constant pressure water replenishment device 7 in sequence and then flows into the first water distributor 4.

[0031] In a preferred embodiment of this utility model, the waste heat utilization system for cooling water of the horizontal continuous feeding electric furnace further includes a standby side circulation unit. The standby side circulation unit includes a standby side water supply pipe 19, a fifth water manifold 12, a standby side return water pipe 20, and a sixth water manifold 13. The standby side water supply pipe 19 enters the wastewater source heat pump unit 1 via the fifth water manifold 12 and the heating side circulation pump 2. The standby side return water pipe 20 flows out of the wastewater source heat pump unit 1 via the heating side circulation pump 2 and the sixth water manifold. Furthermore, the standby side water supply pipe 19 passes through a cyclone separator 8 before entering the fifth water manifold 12.

[0032] This invention fully utilizes the waste heat from the cooling water of the horizontally continuously feeding electric furnace's feeding hood. Through the heat pump technology of the water source heat pump unit's evaporator, the water temperature is increased for various heat-consuming scenarios. The wastewater source side inlet pipe is supplied with water from the cooling water of the horizontally continuously feeding electric furnace's feeding hood. This cooling water can also be used to preheat the cooling water of the electric furnace's waste heat boiler, improving the efficiency of the waste heat boiler system and further increasing the overall system's thermal energy utilization rate. It can also be applied to other processes requiring preheating, achieving the most efficient thermal energy utilization. This can replace traditional heat exchange processes, reducing the loss of other heat exchange energy (steam, coal, etc.), and allowing for multi-purpose use of the heat energy after heat exchange (heating, bathing, etc.). Surplus energy from the plant area can be sold to nearby residential areas for heating, bathing, etc., achieving good environmental and economic benefits.

[0033] This invention utilizes the large cooling water volume and low water temperature (estimated range of 15-25℃ in winter) of the horizontal continuous feeding electric furnace's feeding hood, resulting in a smaller heat exchange temperature difference (5-10℃), making it suitable for various cooling water temperature conditions. This effectively utilizes the waste heat of the cooling water in the horizontal continuous feeding electric furnace's feeding hood, reducing the thermal pollution caused by waste heat emissions and lowering the investment in circulating water cooling towers.

[0034] In addition, considering that the cooling water of the horizontal continuous feeding electric furnace feeding hood may suddenly fail to meet the heat exchange requirements, backup well water, steam, other cooling water system water sources, other groundwater sources, electric auxiliary heating, etc. can be used as backup heat sources to ensure the continuous and stable operation of the heating system.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures.

Claims

1. A waste heat recovery system for cooling water in the feeding hood of a horizontal continuous feeding electric furnace, characterized in that, This includes wastewater source heat pump units, heating-side circulation units, and wastewater source-side circulation units; The heating-side circulation unit includes a heating-side water supply pipe, a first manifold, a heating-side return water pipe, a second manifold, and a heating-side circulation pump. The heating-side water supply pipe enters the wastewater source heat pump unit via the first manifold and the heating-side circulation pump, and the heating-side return water pipe flows out from the wastewater source heat pump unit via the heating-side circulation pump and the second manifold. The wastewater source circulation unit includes a wastewater source side water supply pipe, a third water manifold, a wastewater source side return water pipe, a fourth water manifold, and a wastewater source side circulation pump. The wastewater source side water supply pipe enters the wastewater source heat pump unit through the third water manifold and the wastewater source side circulation pump, and the wastewater source side return water pipe flows out from the wastewater source heat pump unit through the wastewater source side circulation pump and the fourth water manifold.

2. The waste heat recovery system for cooling water of a horizontal continuous feeding electric furnace according to claim 1, characterized in that, There are two sets of wastewater source heat pump units, which can operate simultaneously or serve as backups for each other.

3. The waste heat utilization system for cooling water of a horizontal continuous feeding electric furnace hood according to claim 2, characterized in that, The wastewater source-side water supply pipe passes through a cyclone sand separator before entering the third manifold.

4. The waste heat recovery system for cooling water of a horizontal continuous feeding electric furnace hood according to claim 3, characterized in that, The heating-side water supply pipe passes through a vortex separator before entering the first manifold.

5. A waste heat recovery system for cooling water in a horizontal continuous feeding electric furnace according to claim 4, characterized in that, It also includes a water replenishment unit, which includes a water replenishment inlet pipe, a water replenishment tank, and a constant pressure water replenishment device. The water replenishment inlet pipe flows into the water replenishment tank and the constant pressure water replenishment device in sequence before flowing into the first water distributor.

6. The waste heat recovery system for cooling water of a horizontal continuous feeding electric furnace according to claim 5, characterized in that, It also includes a standby side circulation unit, which includes a standby side water supply pipe, a fifth water manifold, a standby side return water pipe and a sixth water manifold; the standby side water supply pipe enters the sewage source heat pump unit through the fifth water manifold and the heating side circulation pump, and the standby side return water pipe flows out from the sewage source heat pump unit through the heating side circulation pump and the sixth water manifold.

7. A waste heat recovery system for cooling water in a horizontal continuous feeding electric furnace according to claim 6, characterized in that, The backup water supply pipe passes through a cyclone separator before entering the fifth water distribution unit.

Images