Chilled water supplementing system

Abstract

The utility model provides a chilled water supplementing system. The chilled water supplementing system comprises a water circulating device, a chilled water supplementing device and a refrigerating device. The water circulation device comprises a water storage tank, a water outlet pipe and a water inlet pipe connected with the water storage tank, and a water pump arranged on the water inlet pipe. The water outlet pipe is connected with a water inlet of the water storage tank and a water outlet of the crystallizer, and the water inlet pipe is connected with the water outlet of the water storage tank and a water inlet of the crystallizer. According to the chilled water supplementing system, due to the arrangement of the chilled water supplementing device, water in the water outlet pipe of the water circulating device can flow into the refrigerating device, chilled water prepared by the refrigerating device is conveyed into the crystallizer through the water inlet pipe of the water circulating device, and the temperature of cooling water in the crystallizer is rapidly adjusted; therefore, the cooling requirement of the crystallizer is met, and the quality of steel ingots is improved.

Description

Technical Field

[0001] The utility model relates to the technical field, and particularly relates to a chilled water replenishing system. Background Art

[0002] Electroslag remelting is a method of smelting using the resistance heat generated when an electric current passes through molten slag as a heat source, which can improve the purity of metals and improve the crystallization of ingots, thereby obtaining ingots with a uniform and dense crystal structure. During the production process, the cooling condition of the mold directly affects the quality of the crystal structure of the ingot. Usually, the mold is cooled by a single cooling system, but there are problems such as slow adjustment speed of the cooling water temperature and difficulty in following the real-time temperature adjustment during the smelting process, which cannot meet the cooling requirements of the mold and lead to a decline in the quality of the ingot. Summary of the Utility Model

[0003] In view of this, the utility model aims to propose a chilled water replenishing system to meet the cooling requirements of the mold and improve the quality of the ingot.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A chilled water replenishing system includes a water circulation device, a chilled water replenishing device, and a refrigeration device; the water circulation device includes a water storage tank, a water inlet pipe and a water outlet pipe connected to the water storage tank, and a water pump provided on the water inlet pipe;

[0006] The water storage tank is connected to the mold through the water outlet pipe and the water inlet pipe, and the water outlet pipe connects the water inlet of the water storage tank and the water outlet of the mold, and the water inlet pipe connects the water outlet of the water storage tank and the water inlet of the mold; the water inlet end of the refrigeration device is connected to the water outlet pipe through the water distribution structure of the chilled water replenishing device, and the water outlet end of the refrigeration device is connected to the water inlet pipe through the water absorption structure of the chilled water replenishing device; the water in the water outlet pipe can flow to the refrigeration device through the water distribution structure, and the chilled water produced by the refrigeration device can be transported to the water inlet pipe through the water absorption structure.

[0007] Further, the water distribution structure includes a water distribution pipe connected to the water outlet pipe; the water absorption structure includes a Venturi tube connected in series on the water inlet pipe, and a water suction pipe communicating with the throat of the Venturi tube; the water distribution pipe can make the water in the water outlet pipe flow to the refrigeration device, and when the water in the water inlet pipe passes through the Venturi tube, the Venturi tube can suck the chilled water into the water inlet pipe through the water suction pipe.

[0008] Further, a first valve is provided on the water distribution pipe, a second valve is provided on the water suction pipe, and a check valve is connected in series on the water outlet pipe.

[0009] Further, a chilled water tank for storing the chilled water and an auxiliary water pump are connected in series on the water suction pipe.

[0010] Further, the chilled water tank, the auxiliary water pump, the water suction pipe, and the water distribution pipe are all made of stainless steel material.

[0011] Further, the refrigeration device includes an evaporator, a condenser, a compressor, and an expansion valve; the water inlet of the evaporator is connected to the water distribution pipe, and the water outlet of the evaporator is connected to the water suction pipe; the refrigerant outlet of the evaporator is connected to the inlet of the compressor, the outlet of the compressor is connected to the refrigerant inlet of the condenser, and the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator through the expansion valve to form a refrigeration circuit.

[0012] Further, the condenser is an air-cooled condenser; or the condenser is a water-cooled condenser, and the water-cooled condenser is connected to a cooling water tower outside the refrigeration device.

[0013] Further, a pressure relief valve is provided on the pipeline connecting the compressor and the condenser; and / or, the outlet of the compressor and the refrigerant inlet of the evaporator are connected through a pressure relief branch, and a pressure valve is connected in series in the pressure relief branch.

[0014] Further, the outside of the refrigeration device and the chilled water replenishing device is coated with heat insulating material, and the heat insulating material is made of nitrile rubber and polyethylene through a foaming process.

[0015] Compared with the prior art, the present utility model has the following advantages:

[0016] In the chilled water replenishing system of the present utility model, through the setting of the chilled water replenishing device, the water in the water outlet pipe of the water circulation device can flow into the refrigeration device, and the chilled water produced by the refrigeration device is transported to the crystallizer through the water inlet pipe of the water circulation device, quickly adjusting the water temperature of the cooling water in the crystallizer, thereby meeting the cooling requirements of the crystallizer and improving the quality of the ingot.

[0017] In addition, a venturi tube is connected in series on the water inlet pipe. When the water in the water inlet pipe flows through the venturi tube, the venturi tube can suck the chilled water in the evaporator through the water suction pipe connected to the throat, so as to fully mix the water in the water inlet pipe with the chilled water, change the temperature of the water flowing to the crystallizer, and thus improve the cooling effect on the crystallizer. And by sucking the chilled water through the venturi tube, energy consumption can be reduced. A chilled water tank and an auxiliary water pump are connected in series on the water suction pipe. The chilled water tank can store a certain amount of chilled water and quickly transport the chilled water to the water inlet pipe through the auxiliary water pump according to actual needs, so as to further improve the cooling effect on the crystallizer.

[0018] In addition, the refrigeration water tank, the auxiliary water pump, the water suction pipe and the water distribution pipe are all made of stainless steel materials, which can improve the purity of the cooling water, facilitate the formation of supercooled water and enhance the cooling effect. A pressure relief valve is provided on the pipeline connecting the compressor and the condenser, and the refrigerant outlet of the compressor is connected to the refrigerant inlet of the evaporator through a pressure relief branch, which can prevent excessive pressure in the refrigeration circuit and improve the safety of the system. Moreover, the external of the refrigeration device and the refrigeration water replenishment device is coated with heat-insulating materials to keep the refrigeration water at a low temperature and improve the refrigeration efficiency. Brief Description of the Drawings

[0019] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0020] Figure 1 is a schematic structural diagram of the refrigeration water replenishment system according to the embodiment of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the Venturi tube according to the embodiment of the present utility model;

[0022] Figure 3 is a schematic structural diagram of the refrigeration device according to the embodiment of the present utility model;

[0023] Description of the reference numerals in the drawings:

[0024] 1, water circulation device; 2, refrigeration water replenishment device; 3, refrigeration device; 4, crystallizer;

[0025] 11, water storage tank; 12, water outlet pipe; 13, water inlet pipe; 14, water pump; 15, check valve;

[0026] 21, water distribution pipe; 22, Venturi tube; 23, water suction pipe; 24, first valve; 25, second valve; 26, refrigeration water tank; 27, auxiliary water pump;

[0027] 221, throat; 222, inlet section; 223, diffuser section;

[0028] 31, evaporator; 32, condenser; 33, compressor; 34, expansion valve; 35, overflow valve; 36, pressure relief branch; 37, pressure control valve; 38, filter. Detailed Description of the Embodiments

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0030] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connecting piece" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral 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 elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0032] The present utility model will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0033] This embodiment relates to a chilled water make-up system. In terms of the overall structure, in combination with Figure 1 as shown, the chilled water make-up device 2 of this embodiment includes a water circulation device 1, a chilled water make-up device 2, and a refrigeration device 3.

[0034] Among them, the water circulation device 1 includes a water storage tank 11, a water outlet pipe 12 and a water inlet pipe 13 connected to the water storage tank 11, and a water pump 14 provided on the water inlet pipe 13. The water storage tank 11 is connected to the crystallizer 4 through the water outlet pipe 12 and the water inlet pipe 13, and the water outlet pipe 12 connects the water inlet of the water storage tank 11 and the water outlet of the crystallizer 4, and the water inlet pipe 13 connects the water outlet of the water storage tank 11 and the water inlet of the crystallizer 4.

[0035] Moreover, the water inlet end of the refrigeration device 3 is connected to the water outlet pipe 12 through the water distribution structure of the chilled water make-up device 2, and the water outlet end of the refrigeration device 3 is connected to the water inlet pipe 13 through the water absorption structure of the chilled water make-up device 2. The water in the water outlet pipe 12 can flow through the water distribution structure into the refrigeration device 3, and the chilled water produced by the refrigeration device 3 can be transported into the water inlet pipe 13 through the water absorption structure.

[0036] With the above structure, the chilled water make-up system of this embodiment can, through the setting of the chilled water make-up device 2, make the water in the outlet pipe 12 of the water circulation device 1 flow into the refrigeration device 3, and transport the chilled water produced by the refrigeration device 3 to the crystallizer 4 through the inlet pipe 13 of the water circulation device 1, so as to quickly adjust the water temperature of the cooling water in the crystallizer 4, thereby meeting the cooling requirements of the crystallizer 4 and improving the quality of the ingot, and having good practicability.

[0037] Specifically speaking based on the above overall introduction, in this embodiment, in addition to the inlet pipe 13 and the outlet pipe 12 being connected, the crystallizer 4 is also connected to an external cooling system. It can be understood that the external cooling system can cool the crystallizer 4 as a whole, but the speed of adjusting the water temperature of the cooling water in the crystallizer 4 by the external cooling system is slow and it is difficult to perform real-time temperature adjustment following the smelting process. However, the chilled water make-up device 2 of this embodiment can provide additional chilled water to the crystallizer 4 to achieve a rapid change in the water temperature of the cooling water and further meet the cooling requirements of the crystallizer 4.

[0038] Specifically, the cooling water in the crystallizer 4 can flow through the outlet pipe 12 into the water storage tank 11, the water in the water storage tank 11 is transported to the crystallizer 4 through the inlet pipe 13 via a water pump, and chilled water can be input into the crystallizer 4 through the inlet pipe 13 to achieve the transportation of chilled water into the crystallizer 4. During specific implementation, the volume of the water storage tank 11 can preferably be set to 1m 3 , and the water pump 14 can preferably adopt a variable frequency voltage regulating centrifugal water pump to facilitate the control of the water flow rate.

[0039] As a preferred implementation form, continuing to combine Figure 1 shown,

[0040] The water distribution structure includes a water distribution pipe 21 connected to the outlet pipe 12, and the water absorption structure includes a Venturi tube 22 connected in series on the inlet pipe 13, and a water suction pipe 23 communicating with the throat 221 of the Venturi tube 22.

[0041] Among them, the water distribution pipe 21 can make the water in the outlet pipe 12 flow into the refrigeration device 3, and when the water in the inlet pipe 13 passes through the Venturi tube 22, the Venturi tube 22 can suck the chilled water into the inlet pipe 13 through the water suction pipe 23.

[0042] It can be understood that when the water in the water inlet pipe 13 flows through the Venturi tube 22, the pressure at the throat 221 is reduced due to the Venturi effect, and the chilled water is sucked into the water inlet pipe 13 through the suction pipe 23, thereby realizing the replenishment of the chilled water. Compared with the method of pumping chilled water, the use of the Venturi effect to replenish chilled water can reduce energy consumption to a certain extent. And during the process of the Venturi tube 22 sucking the chilled water, the sucked chilled water can be fully mixed with the water in the water inlet pipe 13, which is beneficial to the linear change of the water temperature.

[0043] During specific implementation, in combination with Figure 2 As shown, the diameters of the water distribution pipe 21 and the suction pipe 23 can be preferably set to 32 mm, and the diameters of the water inlet pipe 13 and the water outlet pipe 12 can be preferably set to 80 mm. Preferably, the cone angle of the inlet section 222 of the Venturi tube 22 is 21°, the diameter of the throat 221 is 32 mm, and the cone angle of the diffuser section 223 is 15°.

[0044] In this embodiment, as a preferred implementation form, a first valve 24 is provided on the water distribution pipe 21, a second valve 25 is provided on the suction pipe 23, and a check valve 15 is connected in series on the water outlet pipe 12. By controlling the first valve 24, the water flow in the water outlet pipe 12 can be controlled to flow into the water distribution pipe 21, and by controlling the second valve 25, the chilled water in the suction pipe 23 can be controlled to be sucked into the water inlet pipe 13, thereby controlling the replenishment of the chilled water through the valves. In addition, when each valve is opened, during the process of the water flow in the water outlet pipe 12 flowing into the water distribution pipe 21, the pressure in the water circulation device 1 will change. By setting the check valve 15, the reverse flow of water can be prevented to ensure the operation stability of the system.

[0045] In addition, as a preferred implementation form, a chilled water tank 26 for storing chilled water and an auxiliary water pump 27 are connected in series on the suction pipe 23 of this embodiment. When the first valve 24 is controlled to be opened and the second valve 25 is closed, the water in the water outlet pipe 12 can flow into the refrigeration device 3, and the chilled water produced by the refrigeration device 3 can be stored in the chilled water tank 26, so that the chilled water tank 26 stores sufficient chilled water for chilled water replenishment to meet the cooling requirements of the mold 4. During specific implementation, the volume of the chilled water tank 26 can be preferably set to 0.2 m 3 .

[0046] In addition, an auxiliary water pump 27 is also connected in series on the suction pipe 23. By pumping the chilled water through the auxiliary water pump 27, its water supply speed is much greater than the water absorption speed of the Venturi tube 22, and the auxiliary water pump 27 is only started when it is necessary to quickly replenish the chilled water to the mold 4, and it can transport the chilled water stored in the chilled water tank 26 to the water inlet pipe 13 to achieve the rapid replenishment of the chilled water, thereby meeting the cooling requirements of the mold 4 to a certain extent and improving the quality of the ingot.

[0047] Preferably, the refrigeration water tank 26, the auxiliary water pump 27, the water distribution pipe 21 and the water suction pipe 23 are all made of stainless steel material to ensure the purity of the refrigeration water quality. In specific implementation, the refrigeration water preferably adopts deionized softened water, which is beneficial to the existence of the refrigeration water in the form of supercooled water to a certain extent and improves the cooling effect.

[0048] As a preferred implementation form, in combination with Figure 3 As shown, the refrigeration device 3 of this embodiment includes an evaporator 31, a condenser 32, a compressor 33 and an expansion valve 34. The water inlet of the evaporator 31 is connected to the water distribution pipe 21, and the water outlet of the evaporator 31 is connected to the water suction pipe 23. The refrigerant outlet of the evaporator 31 is connected to the inlet of the compressor 33, the outlet of the compressor 33 is connected to the refrigerant inlet of the condenser 32, and the refrigerant outlet of the condenser 32 is connected to the refrigerant inlet of the evaporator 31 through the expansion valve 34 to form a refrigeration cycle, which has a simple and reliable structure and good refrigeration effect.

[0049] Specifically, the refrigerant absorbs heat and vaporizes in the evaporator 31 to produce refrigeration water. The vaporized refrigerant is compressed by the compressor 33 into a high-pressure and high-temperature state and input into the condenser 32. After condensation, the refrigerant is converted into a high-pressure liquid, becomes a low-pressure and low-temperature liquid through the expansion valve 34, and then enters the evaporator 31 again to absorb heat and vaporize, achieving the purpose of cyclic refrigeration. In specific implementation, a filter 38 is connected in series on the pipeline connecting the condenser 32 and the expansion valve 34 to filter impurities in the refrigerant to improve the operation stability of the refrigeration cycle.

[0050] Among them, as a preferred implementation form, the condenser 32 of this embodiment is an air-cooled condenser 32. While having a good condensation effect, the air-cooled condenser 32 has a simple structure and is easy to maintain, which can reduce the operation cost of the system to a certain extent. Or, the condenser 32 of this embodiment is a water-cooled condenser 32, and it is connected to a cooling water tower outside the refrigeration device 3, which has a good condensation effect and is beneficial to improving the refrigeration efficiency.

[0051] In specific implementation, the water temperature range of the refrigeration water produced by the refrigeration device 3 can be preferably set to -15 to -5 °C, and the refrigeration capacity of the refrigeration device 3 is preferably set to 20 to 30 kW to meet the cooling requirements of the mold 4.

[0052] In this embodiment, as a preferred implementation form, an overflow valve 35 is provided on the pipeline connecting the compressor 33 and the condenser 32. When the pressure in the refrigeration circuit is too high, the overflow valve 35 can open and discharge part of the refrigerant in the refrigeration circuit into the atmosphere, ensuring the safe operation of the refrigeration device 3 and improving the overall safety of the system. At the same time, the outlet of the compressor 33 is connected to the refrigerant inlet of the evaporator 31 through a pressure relief branch 36. A pressure control valve 37 is connected in series in the pressure relief branch 36. When the pressure in the refrigeration circuit is too high, the pressure control valve 37 can open, allowing the refrigerant to be directly input into the compressor and directly into the evaporator 31 to reduce the pressure in the refrigeration circuit, thereby ensuring the safe operation of the refrigeration device 3.

[0053] As a preferred implementation form, the exteriors of the refrigeration device 3 and the chilled water replenishing device 2 are coated with heat-insulating materials, and the heat-insulating materials are made of nitrile rubber and polyethylene through a foaming process. The preparation process of the above heat-insulating materials is mature, with good heat preservation performance and aging resistance. By coating the heat-insulating materials, it can effectively prevent the chilled water in the refrigeration device 3 and the chilled water replenishing device 2 from heating up, resulting in a decline in the cooling effect. And by coating the heat-insulating materials, it can also improve the refrigeration efficiency of the refrigeration device 3 to a certain extent.

[0054] In the chilled water replenishing system of this embodiment, through the setting of the chilled water replenishing device 2, the water in the outlet pipe 12 of the water circulation device 1 can flow into the refrigeration device 3, and the chilled water produced by the refrigeration device 3 can be transported to the crystallizer 4 through the inlet pipe 13 of the water circulation device 1 to quickly adjust the water temperature of the cooling water in the crystallizer 4, thereby meeting the cooling requirements of the crystallizer 4 and improving the quality of the ingot.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A chilled water replenishment system, characterized in that: It comprises a water circulation device (1), a chilled water replenishing device (2) and a refrigeration device (3); The water circulation device (1) comprises a water storage tank (11), a water outlet pipe (12) and a water inlet pipe (13) connected to the water storage tank (11), and a water pump (14) arranged on the water inlet pipe (13); The water storage tank (11) is connected to the crystallizer (4) via the water outlet pipe (12) and the water inlet pipe (13), and the water outlet pipe (12) connects the water inlet of the water storage tank (11) and the water outlet of the crystallizer (4), and the water inlet pipe (13) connects the water outlet of the water storage tank (11) and the water inlet of the crystallizer (4); The water inlet end of the refrigeration device (3) is connected to the water outlet pipe (12) via the water distribution structure of the chilled water replenishing device (2), and the water outlet end of the refrigeration device (3) is connected to the water inlet pipe (13) via the water absorption structure of the chilled water replenishing device (2); The water in the water outlet pipe (12) can flow into the refrigeration device (3) through the water distribution structure, and the chilled water produced by the refrigeration device (3) can be transported to the water inlet pipe (13) through the water absorption structure.

2. The chilled water replenishment system according to claim 1, characterized in that: The water distribution structure comprises a water distribution pipe (21) connected to the water outlet pipe (12); The water absorption structure comprises a venturi tube (22) connected in series to the water inlet pipe (13), and a water absorption pipe (23) connected to the throat (221) of the venturi tube (22); The water distribution pipe (21) can allow the water in the water outlet pipe (12) to flow toward the refrigeration device (3), and when the water in the water inlet pipe (13) passes through the Venturi tube (22), the Venturi tube (22) can absorb the chilled water into the water inlet pipe (13) through the water suction pipe (23).

3. The chilled water replenishment system according to claim 2, characterized in that: The water distribution pipe (21) is provided with a first valve (24), the water suction pipe (23) is provided with a second valve (25), and the water outlet pipe (12) is connected in series with a one-way valve (15).

4. The chilled water replenishment system according to claim 3, characterized in that: The water suction pipe (23) is serially connected with a chilled water tank (26) for storing the chilled water and an auxiliary water pump (27).

5. The chilled water replenishment system according to claim 4, characterized in that: The freezing water tank (26), the auxiliary water pump (27), the water suction pipe (23) and the water distribution pipe (21) are all made of stainless steel.

6. The chilled water replenishment system according to claim 2, characterized in that: The refrigeration device (3) comprises an evaporator (31), a condenser (32), a compressor (33) and an expansion valve (34); The water inlet of the evaporator (31) is connected to the water distribution pipe (21), and the water outlet of the evaporator (31) is connected to the water suction pipe (23); The refrigerant outlet of the evaporator (31) is connected to the inlet of the compressor (33), the outlet of the compressor (33) is connected to the refrigerant inlet of the condenser (32), and the refrigerant outlet of the condenser (32) is connected to the refrigerant inlet of the evaporator (31) through the expansion valve (34) to form a refrigeration circuit.

7. The chilled water replenishment system according to claim 6, characterized in that: The condenser (32) is an air-cooled condenser (32); Alternatively, the condenser (32) is a water-cooled condenser (32), and the water-cooled condenser (32) is connected to a cooling water tower outside the refrigeration device (3).

8. The chilled water replenishment system according to claim 6, characterized in that: A relief valve (35) is provided on the pipeline connecting the compressor (33) and the condenser (32); And / or, the outlet of the compressor (33) is connected to the refrigerant inlet of the evaporator (31) via a pressure relief branch (36), and a pressure control valve (37) is connected in series in the pressure relief branch (36).

9. The chilled water replenishment system according to any one of claims 1 to 8, characterized in that: The exterior of the refrigeration device (3) and the chilled water replenishing device (2) is coated with a heat insulating material, and the heat insulating material is made of nitrile rubber and polyethylene through a foaming process.

Images