Circulating system for intermittently generating power by using residual pressure of quenching direct cooling water

Abstract

The utility model discloses a circulating system capable of intermittently generating power by utilizing residual pressure of quenching direct cooling water, which comprises a water supply system, a quenching unit, a water treatment system, a high-level water storage tank, a hydraulic turbine unit, a generator set and a low-level regulating reservoir, wherein an input end of the water supply system is connected with a water outlet of the low-level regulating reservoir; the output end of the water supply system is respectively connected with the quenching unit, the high-level water storage tank and the low-level regulating reservoir for water supply, the water inlet end of the water treatment system is connected with the quenching unit, the water outlet end of the water treatment system is connected with the water inlet of the low-level regulating reservoir, and the water outlet of the high-level water storage tank is connected with the water inlet of the low-level regulating reservoir; the generator set is connected with the hydraulic turbine set. According to the utility model, electric energy conversion can be realized, energy waste can be effectively reduced, power generation yield can be effectively improved, and electric energy consumption during production can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling water circulation, and particularly relates to a circulation system for intermittently generating electricity by using the residual pressure of quenching direct cooling water. Background Technique

[0002] The metallurgical industry is characterized by high energy consumption and high pollution. As the last processing step before steel products, the energy consumption of the steel rolling process accounts for about 13% - 20% of the total energy consumption of the national iron and steel industry. The energy consumption index of hot-rolled seamless steel pipes is 1045.1 J / t, which is the process with the highest average energy consumption among all steel rolling processes. "Energy conservation" and "emission reduction" are two major issues for steel pipe enterprises. The heat treatment of seamless steel pipes is a concentrated manifestation of obtaining high-value-added products at low cost, which can significantly improve the hardness and stiffness of steel.

[0003] At present, the heat treatment of seamless steel pipes usually adopts the spray water quenching process. The spray water quenching device for steel pipes has the characteristics of large water consumption and high water quality requirements. The quenching water consumption accounts for about 90% of the direct cooling water consumption of the entire heat treatment project. The processing cycle of general seamless steel pipes is 20 - 60 s, among which the water usage time is 10 - 30 s. Generally, it includes two parts: internal spraying and external spraying. The water pressure for internal spraying is generally 1.2 Mpa, and the water pressure for external spraying is generally 0.3 - 0.6 Mpa. Usually, a circulating water system is set up to reduce water consumption. The energy consumption of the circulating water system is extremely high. And due to the fast production rhythm, the cooling water is generally supplied continuously, and the pressurized water without usage demand during the working interval of the quenching device is generally directly depressurized and refluxed, thus causing a certain amount of energy waste, that is, half of the pump electric energy is useless work. Content of the Utility Model

[0004] To solve some or all of the technical problems existing in the above-mentioned prior art, the utility model provides a circulation system for intermittently generating electricity by using the residual pressure of quenching direct cooling water, which includes a water supply system, a quenching unit, a water treatment system, a high-level water storage tank, a water turbine unit, a generator set, and a low-level regulating pool, wherein: the input end of the water supply system is connected to the outlet of the low-level regulating pool, the output end of the water supply system is respectively connected to the quenching unit, the high-level water storage tank, and the low-level regulating pool for water supply, the water inlet end of the water treatment system is connected to the quenching unit, the water outlet end of the water treatment system is connected to the water inlet of the low-level regulating pool, the water drainage port of the high-level water storage tank is connected to the water inlet of the low-level regulating pool, the water turbine unit is arranged on the low-level regulating pool, and the generator set is connected to the water turbine unit.

[0005] Further, in the above-mentioned circulation system for intermittently generating electricity by using the residual pressure of quenching direct cooling water, the water treatment system includes an iron sheet pit, a dirty circulating hot water tank, a water pump, a filter, and a cooling tower. The water inlet of the dirty circulating hot water tank is connected to the water outlet of the iron sheet pit. The water inlet of the water pump is connected to the water outlet of the dirty circulating hot water tank. The water inlet of the filter is connected to the water outlet of the water pump. The water inlet end of the cooling tower is connected to the water outlet of the filter.

[0006] Further, in the above-mentioned circulation system for intermittently generating electricity by using the residual pressure of quenching direct cooling water, the drainage outlet of the quenching unit is connected to the water inlet of the iron sheet pit.

[0007] Further, in the above-mentioned circulation system for intermittently generating electricity by using the residual pressure of quenching direct cooling water, the water supply system includes a plurality of circulating water pumps and two groups of circulating pipelines. The plurality of circulating water pumps supply water to the two groups of circulating pipelines. Each group of circulating pipelines is respectively communicated with the quenching unit, the high-level water storage tank, and the low-level regulating tank.

[0008] Further, in the above-mentioned circulation system for intermittently generating electricity by using the residual pressure of quenching direct cooling water, the high-level water storage tank is provided with a water replenishing pipeline.

[0009] Further, in the above-mentioned circulation system for intermittently generating electricity by using the residual pressure of quenching direct cooling water, the input end of the water turbine corresponds to the connection between the high-level water storage tank and the water inlet of the regulating tank. The output end of the water turbine is connected to the generator set through a belt.

[0010] The circulation system for intermittently generating electricity by using the residual pressure of quenching direct cooling water of the present utility model has the following advantages and beneficial effects:

[0011] (1) By adopting a high-level water storage tank to store and then release the water wasted during the idle time of the quenching unit, this kinetic energy is converted into gravitational potential energy through release, and then converted into electrical energy through stable outflow, effectively reducing energy waste. At the same time, it effectively ensures the stability of the water supply flow rate and pressure when the quenching unit uses water again, and improves the qualified rate of quenching quality.

[0012] (2) By the high-level water storage tank releasing stored water to the low-level regulating tank, the kinetic energy of intermittent and non-linear water is effectively converted into continuous, uniform, and linear energy, thereby effectively increasing the power generation output and effectively reducing the power consumption during production. Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings. In the accompanying drawings:

[0014] Figure 1 This is a schematic structural diagram of the circulation system for intermittent power generation using the residual pressure of quenching direct cooling water of the present utility model.

[0015] Description of the reference numerals in the drawings:

[0016] 1: Water supply system, 11: Circulation water pump, 12: Circulation pipeline;

[0017] 2: Quenching unit;

[0018] 3: Water treatment system, 31: Iron sheet pit, 32: Turbid ring hot water pool, 33: Water pump, 34: Filter, 35: Cooling tower;

[0019] 4: High-level water storage tank, 41: Make-up water pipeline;

[0020] 5: Water turbine unit; 6: Generator set; 7: Low-level regulating pool. Detailed implementation manners

[0021] To make the purpose, technical solutions and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model in combination with the specific embodiments and corresponding accompanying drawings of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0022] As Figure 1 shown, the circulation system for intermittent power generation using the residual pressure of quenching direct cooling water of the present utility model includes a water supply system 1, a quenching unit 2, a water treatment system 3, a high-level water storage tank 4, a water turbine unit 5, a generator set 6 and a low-level regulating pool 7, wherein: the input end of the water supply system 1 is connected to the outlet of the low-level regulating pool 7, the output end of the water supply system 1 is respectively connected to the quenching unit 2, the high-level water storage tank 4 and the low-level regulating pool 7 for water supply, the water inlet end of the water treatment system 3 is connected to the quenching unit 2, the water outlet end of the water treatment system 3 is connected to the water inlet of the low-level regulating pool 7, the drain outlet of the high-level water storage tank 4 is connected to the water inlet of the low-level regulating pool 7, the water turbine unit 5 is arranged on the low-level regulating pool 7, and the generator set 6 is connected to the water turbine unit 5.

[0023] Further, in the circulation system of the present utility model for intermittently generating electricity by utilizing the residual pressure of quenching direct cooling water, the water treatment system 3 includes an iron pit 31, a dirty ring hot water tank 32, a water pump 33, a filter 34, and a cooling tower 35. The water inlet of the dirty ring hot water tank 32 is connected to the water outlet of the iron pit 31. The water inlet of the water pump 33 is connected to the water outlet of the dirty ring hot water tank 32. The water inlet of the filter 34 is connected to the water outlet of the water pump 33. The water inlet end of the cooling tower 35 is connected to the water outlet of the filter 34. The water outlet end of the cooling tower 35 is connected to the water inlet of the low-level regulating tank 7, effectively ensuring that the water in the low-level regulating tank 7 can be purified and recycled, reducing energy waste.

[0024] Further, in the circulation system of the present utility model for intermittently generating electricity by utilizing the residual pressure of quenching direct cooling water, the water discharge port of the quenching unit 2 is connected to the water inlet of the iron pit 31, effectively ensuring that the water after quenching of the quenching unit 2 can enter the water treatment system 3 for treatment.

[0025] Further, in the circulation system of the present utility model for intermittently generating electricity by utilizing the residual pressure of quenching direct cooling water, the water supply system 1 includes a plurality of circulating water pumps 11 and two groups of circulating pipelines 12. The plurality of circulating water pumps 11 supply water to the two groups of circulating pipelines 12. Each group of circulating pipelines 12 is respectively connected to the quenching unit 2, the high-level water storage tank 4, and the low-level regulating tank 7, thereby effectively ensuring the stability of the water supply to the quenching unit 2, and storing the excess water through the high-level water storage tank 4 and discharging it back to the low-level regulating tank 7.

[0026] Further, in the circulation system of the present utility model for intermittently generating electricity by utilizing the residual pressure of quenching direct cooling water, the high-level water storage tank 4 is provided with a water replenishing pipeline 41, thereby effectively replenishing the production water.

[0027] Further, in the circulation system of the present utility model for intermittently generating electricity by utilizing the residual pressure of quenching direct cooling water, the input end of the water turbine corresponds to the connection between the high-level water storage tank 4 and the water inlet of the regulating tank. The output end of the water turbine is connected to the generator set 6 through a belt, thereby providing power to the water turbine through the water flow at the water inlet of the regulating tank and driving the generator set 6 to generate electricity.

[0028] Specifically, when quenching is carried out in the quenching unit 2, the water supply system 1 extracts water from the low-level regulating pool 7 to supply water to the quenching unit 2. The sewage after quenching enters the iron pit 31 for sedimentation, is then treated in the dirty water hot pool 32, and is pressurized by the water pump 33, filtered through the filter 34, and enters the cooling tower 35 for cooling. The cooled water enters the low-level regulating pool 7 for recycling. When there is no demand for pressurized water during the working interval of the quenching unit 2, in order to ensure the stability of the water supply flow rate and pressure when the quenching unit 2 uses water again, the pressurized water supplies water to the high-level water storage tank 4. The high-level water storage tank 4 stores water. When the high-level water storage tank 4 is full or the water level in the low-level regulating pool 7 is too low, the high-level water storage tank 4 releases the stored water. During the release process, the stored water is pressurized by gravity, provides a continuous and stable water flow to the water turbine, and generates electricity through the generator set 6. When the high-level water storage tank 4 is full of water, in order to reduce energy waste and at the same time ensure the stability of the water supply flow rate and pressure when the quenching unit 2 uses water again, the pressurized water can enter the low-level regulating pool 7 through the circulation pipeline 12.

[0029] In summary, compared with the prior art, the circulating system for intermittently generating electricity by using the residual pressure of direct cooling water for quenching of the present utility model has the following advantages and beneficial effects:

[0030] (1) By using a high-level water storage tank to store the water wasted during the working interval of the quenching unit and then releasing it, this kinetic energy is converted into gravitational potential energy through release, and then converted into electrical energy through stable outflow, effectively reducing energy waste. At the same time, it effectively ensures the stability of the water supply flow rate and pressure when the quenching unit uses water again, and improves the qualified rate of quenching quality.

[0031] (2) By the high-level water storage tank releasing the stored water to the low-level regulating pool, the kinetic energy of intermittent and non-linear water is effectively converted into continuous, uniform and linear energy, thereby effectively increasing the power generation output and at the same time effectively reducing the power consumption during production.

[0032] It should be noted that in this text, unless otherwise clearly stipulated and defined, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. In addition, in this text, "front", "rear", "left", "right", "upper" and "lower" are all referenced with respect to the placement state shown in the drawings.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A circulation system for intermittent power generation using the residual pressure of direct cooling water from quenching, characterized in that: The circulation system for intermittent power generation using the residual pressure of quenching direct cooling water includes a water supply system, a quenching unit, a water treatment system, a high-level water storage tank, a turbine unit, a generator unit and a low-level regulating tank, wherein: the input end of the water supply system is connected to the water outlet of the low-level regulating tank, the output end of the water supply system is respectively connected to the quenching unit, the high-level water storage tank and the low-level regulating tank for water supply, the water inlet end of the water treatment system is connected to the quenching unit, the water outlet end of the water treatment system is connected to the water inlet of the low-level regulating tank, the drain outlet of the high-level water storage tank is connected to the water inlet of the low-level regulating tank, the turbine unit is arranged on the low-level regulating tank, and the generator unit is connected to the turbine unit.

2. The circulation system for intermittent power generation using the residual pressure of direct quenching cooling water according to claim 1 is characterized in that: The water treatment system includes a sheet metal pit, a turbid ring hot water pool, a water pump, a filter and a cooling tower. The water inlet of the turbid ring hot water pool is connected to the water outlet of the sheet metal pit, the water inlet of the water pump is connected to the water outlet of the turbid ring hot water pool, the water inlet of the filter is connected to the water outlet of the water pump, and the water inlet end of the cooling tower is connected to the water outlet of the filter.

3. The circulation system for intermittent power generation using the residual pressure of direct quenching cooling water according to claim 2 is characterized in that: The quenching unit drain port is connected to the iron sheet pit water inlet.

4. The circulation system for intermittent power generation using the residual pressure of direct quenching cooling water according to claim 1 is characterized in that: The water supply system includes a plurality of circulating water pumps and two groups of circulating pipes. The plurality of circulating water pumps are combined to supply water to the two groups of circulating pipes. Each group of circulating pipes is respectively connected to the quenching unit, the high-level water storage tank and the low-level regulating tank.

5. The circulation system for intermittent power generation using the residual pressure of direct quenching cooling water according to claim 1, characterized in that: The high-level water storage tank is provided with a water replenishment pipeline.

6. The circulation system for intermittent power generation using the residual pressure of direct quenching cooling water according to claim 1, characterized in that: The water turbine input end corresponds to the connection between the high-level water storage tank and the water inlet of the regulating tank, and the water turbine output end is connected to the generator set through a belt.

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