Blast furnace electric blower unit cooling system

Abstract

The utility model discloses a blast furnace electric blower unit cooling system which comprises a lithium bromide refrigerator, a motor air cooler, a lubricating oil cooler, a control oil cooler and a cooling tower, and the lithium bromide refrigerator comprises a steam pipeline, a chilled water loop, a cooling water loop and a refrigerant loop; the motor air cooler is arranged on the chilled water loop; the lubricating oil cooler is arranged on the chilled water loop; the control oil cooler is arranged on the chilled water loop; and the cooling tower is arranged on the cooling water loop. According to the blast furnace electric air blower unit cooling system disclosed by the embodiment of the utility model, chilled water circulates in a closed manner among the lithium bromide refrigerator, the motor air cooler, the lubricating oil cooler and the control oil cooler, and the chilled water is not in contact with other media, so that the water quality of the chilled water is cleaner, more sanitary and more stable, and the service life of the chilled water is prolonged. The cooling effect on the blast furnace electric blower set can be guaranteed, normal operation of the blast furnace electric blower set is further guaranteed, meanwhile, water consumption is low, and water can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling of blast furnace electric blower units, and more specifically to a cooling system of blast furnace electric blower units. Background Art

[0002] During the operation of the blast furnace electric blower unit, circulating cooling is generally adopted for the motor air cooler, lubricating oil cooler and control oil cooler. The circulating water is pressurized by the circulating water pump and sent to the motor air cooler, lubricating oil cooler and control oil cooler. After cooling, the higher temperature circulating water flows back to the cooling tower for heat exchange with the air. The cooled circulating water returns to the circulating water pump to complete a cooling cycle.

[0003] During the heat exchange process between circulating water and air, dust in the air enters the circulating water, resulting in poor circulating water quality, which can cause blockage of the motor air cooler and poor cooling effect. Especially in the high temperature stage in summer, the circulating water temperature is high and cannot fully meet the cooling requirements of the motor air cooler. If industrial water or domestic water is used, the cooling cost will be higher.

[0004] Therefore, how to improve the poor water quality of circulating water in the cooling system of the blast furnace electric blower unit and ensure the cooling effect of the blast furnace electric blower unit has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a blast furnace electric blower unit cooling system to improve the problem of poor circulating water quality in the cooling system and ensure the cooling effect of the blast furnace electric blower unit.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A blast furnace electric blower unit cooling system, comprising:

[0008] Lithium bromide refrigerator, the lithium bromide refrigerator includes a steam pipeline, a chilled water circuit, a cooling water circuit and a refrigerant circuit;

[0009] Motor air cooler, the motor air cooler is set on the chilled water circuit;

[0010] Lubricating oil cooler, the lubricating oil cooler is arranged on the chilled water circuit;

[0011] Control oil cooler, the control oil cooler is set on the chilled water circuit;

[0012] Cooling tower, cooling tower is installed in the cooling water loop.

[0013] Optionally, in the above-mentioned blast furnace electric blower unit cooling system, a chilled water circulation pump is provided on the chilled water circuit, and valves are provided on the inlet and outlet pipelines of the chilled water circulation pump.

[0014] Optionally, in the above-mentioned blast furnace electric blower unit cooling system, the chilled water circuit includes a first chilled water pipeline, a second chilled water pipeline, a first chilled water branch, a second chilled water branch and a third chilled water branch;

[0015] The first chilled water pipeline is connected to the chilled water outlet of the lithium bromide refrigerator, the second chilled water pipeline is connected to the chilled water inlet of the lithium bromide refrigerator, and the chilled water circulation pump is arranged on the first chilled water pipeline;

[0016] The first chilled water branch, the second chilled water branch and the third chilled water branch are arranged in parallel between the first chilled water pipeline and the second chilled water pipeline, the motor air cooler is arranged on the first chilled water branch, the lubricating oil cooler is arranged on the second chilled water branch, and the control oil cooler is arranged on the third chilled water branch.

[0017] Optionally, in the above-mentioned blast furnace electric blower unit cooling system, a cooling water circulation pump is provided on the cooling water loop, the cooling water circulation pump is provided on the outlet pipeline of the cooling tower, and valves are provided at the inlet and outlet of the cooling water circulation pump.

[0018] Optionally, the above-mentioned blast furnace electric blower unit cooling system further includes a condensate water pool, which is arranged on a condensate water pipeline connected to the condensate water outlet of the lithium bromide refrigeration machine.

[0019] Optionally, the above-mentioned blast furnace electric blower unit cooling system also includes a chilled water make-up system, which includes a chilled water make-up pipeline, the chilled water make-up pipeline is connected to the first chilled water pipeline, and the chilled water make-up point is located upstream of the chilled water circulation pump.

[0020] Optionally, in the above-mentioned blast furnace electric blower unit cooling system, the chilled water make-up system includes a desalted water tank arranged on the make-up water pipeline.

[0021] Optionally, in the above-mentioned blast furnace electric blower unit cooling system, a first sewage pipeline is arranged on the first chilled water pipeline, a second sewage pipeline is arranged on the cooling tower, and a third sewage pipeline is arranged on the make-up water pipeline.

[0022] Optionally, in the above-mentioned blast furnace electric blower unit cooling system, a cooling tower water supply pipe is provided on the cooling tower.

[0023] Optionally, in the above-mentioned blast furnace electric blower unit cooling system, the temperature of the chilled water in the first chilled water pipeline is between 10°C and 15°C.

[0024] It can be seen from the above technical scheme that in the cooling system of the blast furnace electric blower unit disclosed in the embodiment of the utility model, the chilled water circulates in a closed manner between the lithium bromide refrigerator and the motor air cooler, the lubricating oil cooler and the control oil cooler, and the chilled water does not contact other media. Therefore, the water quality of the chilled water is cleaner and more hygienic than the open system in the prior art, and the water quality is more stable, which can ensure the cooling effect of the blast furnace electric blower unit, and then ensure the normal operation of the blast furnace electric blower unit. At the same time, the closed system makes the water consumption of chilled water lower, which can save water. By using the low-temperature and low-pressure saturated steam generated in the steel production process, the release of steam can be reduced, energy consumption can be reduced, and energy can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 The present invention is a flow chart of a cooling system for a blast furnace electric blower unit disclosed in an embodiment of the present utility model.

[0027] Wherein, 100 is a lithium bromide refrigerator, 110 is a chilled water circulation pump inlet valve, 120 is a chilled water circulation pump, 130 is a chilled water circulation pump outlet valve, and 140 is a first sewage valve;

[0028] 200 is a motor air cooler, 210 is an inlet valve of the motor air cooler, and 220 is an outlet valve of the motor air cooler;

[0029] 300 is a lubricating oil cooler, 310 is a lubricating oil cooler inlet valve, and 320 is a lubricating oil cooler outlet valve;

[0030] 400 is a control oil cooler, 410 is a control oil cooler inlet valve, and 420 is a control oil cooler outlet valve;

[0031] 500 is a cooling tower, 510 is a cooling water circulation pump inlet valve, 520 is a cooling water circulation pump, 530 is a cooling water circulation pump outlet valve, 540 is a second sewage valve, and 550 is a cooling water replenishment valve;

[0032] 600 is a desalted water tank, 610 is a desalted water tank inlet valve, 620 is a desalted water tank outlet valve, and 630 is a third sewage valve;

[0033] 700 is a condensate pool, 710 is a steam valve, and 720 is a condensate valve. DETAILED DESCRIPTION

[0034] In addition to the problems mentioned in the background technology, the prior art also has the problems of large circulating water volume and high power consumption.

[0035] The core of the utility model is to disclose a cooling system for a blast furnace electric blower unit, so as to improve the problem of poor quality of circulating water in the cooling system and ensure the cooling effect of the blast furnace electric blower unit.

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] like Figure 1 As shown, an embodiment of the utility model discloses a cooling system for a blast furnace electric blower unit, including a lithium bromide refrigerator 100, a motor air cooler 200, a lubricating oil cooler 300, a control oil cooler 400 and a cooling tower 500.

[0038] It should be noted that the lithium bromide refrigerator 100 can be a single-effect lithium bromide refrigerator or a multi-effect lithium bromide refrigerator, for example, a double-effect lithium bromide refrigerator. For the convenience of description, the following description takes a single-effect lithium bromide refrigerator as an example.

[0039] The steam in the steam pipeline is low-temperature, low-pressure saturated steam generated during the steel smelting process, with a steam pressure of more than 0.2 MPa and a temperature of more than 120°C. The lithium bromide refrigerator 100 includes a generator, a condenser, an evaporator and an absorber. The motor air cooler 200, the lubricating oil cooler 300 and the control oil cooler 400 are all arranged on the chilled water circuit, which can be arranged in series or in parallel, preferably in parallel.

[0040] The lithium bromide refrigerator 100 includes a steam pipeline, a chilled water circuit, a cooling water circuit and a refrigerant circuit. The medium in the steam pipeline is steam. In order to control the steam flow entering the lithium bromide refrigerator 100, a steam valve 710 is provided on the steam pipeline. The medium in the chilled water circuit is chilled water, and the chilled water is preferably demineralized water. The medium in the cooling water circuit is cooling water, and the medium in the refrigerant circuit is lithium bromide aqueous solution.

[0041] Steam enters the generator through the steam pipeline, heats the lithium bromide aqueous solution and becomes condensed water before being discharged. The concentration of the lithium bromide aqueous solution increases after being heated in the generator, becomes a concentrated solution and enters the absorber, and the generated water vapor enters the condenser; the water vapor entering the condenser is cooled by the cooling water and condensed to become liquid water, which enters the evaporator, where it vaporizes and absorbs the heat of the chilled water. The chilled water is discharged from the evaporator after the temperature is lowered, and the liquid water becomes low-temperature water vapor in the evaporator and enters the absorber, where it is absorbed by the concentrated solution in the absorber, and the concentration of the lithium bromide aqueous solution is reduced, and then it is sent back to the generator by the solution pump. The cooling water absorbs the dilution heat of the lithium bromide solution in the absorber, and the temperature increases.

[0042] The chilled water flowing out of the evaporator exchanges heat with the air in the motor air cooler 200 to cool the motor air cooler 200; exchanges heat with the lubricating oil in the lubricating oil cooler 300 to cool the lubricating oil cooler 300; exchanges heat with the control oil in the control oil cooler 400 to cool the control oil cooler 400, and after the temperature rises, it flows back to the evaporator to cool down, forming a complete cycle. It should be noted that in the cooling system of the blast furnace electric blower unit disclosed in the embodiment of the utility model, the temperature of the chilled water produced by the lithium bromide refrigerator 100 is between 10°C and 15°C.

[0043] The cooling water flows through the absorber and the condenser in sequence, is discharged after the temperature rises, and enters the cooling tower 500, exchanges heat with the air in the cooling tower 500, and flows back to the absorber after the temperature drops.

[0044] The blast furnace electric blower cooling system disclosed in the embodiment of the utility model has chilled water circulating in a closed manner between the lithium bromide refrigerator 100 and the motor air cooler 200, the lubricating oil cooler 300 and the control oil cooler 400, and the chilled water does not contact other media. Therefore, the water quality of the chilled water is cleaner and more hygienic than the open system in the prior art, and the water quality is more stable, which can ensure the cooling effect of the blast furnace electric blower, and further ensure the normal operation of the blast furnace electric blower. At the same time, the closed system makes the water consumption of chilled water lower, which can save water. The low-temperature and low-pressure saturated steam generated in the steel production process can reduce the emission of steam, reduce energy consumption, and save energy.

[0045] The blast furnace electric blower unit cooling system disclosed in the embodiment of the utility model is provided with a chilled water circulation pump 120 on the chilled water circuit, and valves are provided on the inlet and outlet pipelines of the chilled water circulation pump 120, such as the chilled water circulation pump inlet valve 110 and the chilled water circulation pump outlet valve 130 shown in the figure. The chilled water circulation pump inlet valve 110 and the chilled water circulation pump outlet valve 130 can control the opening and closing of the water inlet and outlet of the chilled water circulation pump 120, thereby controlling the water flow rate of the chilled water.

[0046] like Figure 1As shown, the cooling system of the electric blower unit of a blast furnace disclosed in the embodiment of the utility model, the chilled water circuit includes a first chilled water pipeline, a second chilled water pipeline, a first chilled water branch, a second chilled water branch and a third chilled water branch, the first chilled water pipeline is connected to the chilled water outlet of the lithium bromide refrigerator 100, specifically, the chilled water inlet of the evaporator. The second chilled water pipeline is connected to the chilled water inlet of the lithium bromide refrigerator 100, specifically, the chilled water outlet of the evaporator, and the chilled water circulation pump 120 is arranged on the first chilled water pipeline.

[0047] The first chilled water branch, the second chilled water branch and the third chilled water branch are arranged in parallel between the first chilled water pipeline and the second chilled water pipeline, the motor air cooler 200 is arranged on the first chilled water branch, the lubricating oil cooler 300 is arranged on the second chilled water branch, and the control oil cooler 400 is arranged on the third chilled water branch.

[0048] The chilled water produced by the lithium bromide refrigerator 100 is pressurized by the chilled water circulation pump 120 and sent to the first chilled water pipeline, and then distributed to the motor air cooler 200, the lubricating oil cooler 300 and the control oil cooler 400. The chilled water after cooling and heating the motor air cooler 200, the lubricating oil cooler 300 and the control oil cooler 400 is converged into the second chilled water pipeline and sent to the lithium bromide refrigerator 100 for cooling, and the cycle is repeated.

[0049] In order to control the chilled water entering and exiting the motor air cooler 200, a motor air cooler inlet valve 210 is provided on the inlet pipeline of the motor air cooler 200, and a motor air cooler outlet valve 220 is provided on the outlet pipeline of the motor air cooler 200. The specific types of the motor air cooler inlet valve 210 and the motor air cooler outlet valve 220 are not limited, and both can be set as regulating valves with a shut-off function, which can adjust the chilled water flow entering the motor air cooler 200 while playing a shut-off role, or the motor air cooler inlet valve 210 is set as a regulating valve with a shut-off function, and the motor air cooler outlet valve 220 is set as a shut-off valve.

[0050] In order to control the chilled water entering and exiting the lubricating oil cooler 300, a lubricating oil cooler inlet valve 310 is provided on the inlet pipeline of the lubricating oil cooler 300, and a lubricating oil cooler outlet valve 320 is provided on the outlet pipeline of the lubricating oil cooler 300. The specific types of the lubricating oil cooler inlet valve 310 and the lubricating oil cooler outlet valve 320 are not limited, as long as they play a shutoff and regulating role.

[0051] In order to control the chilled water entering and exiting the control oil cooler 400, a control oil cooler inlet valve 410 is provided on the inlet pipeline of the control oil cooler 400, and a control oil cooler outlet valve 420 is provided on the outlet pipeline of the control oil cooler 400. The specific types of the control oil cooler inlet valve 410 and the control oil cooler outlet valve 420 are not limited, as long as they play a shutoff and regulating role.

[0052] The blast furnace electric blower unit cooling system disclosed in the embodiment of the utility model is provided with a cooling water circulation pump 520 on the cooling water loop. The cooling water circulation pump 520 is arranged on the outlet pipeline of the cooling tower 500, and the inlet and outlet of the cooling water circulation pump 520 are provided with valves, such as the cooling water circulation pump inlet valve 510 and the cooling water circulation pump outlet valve 530 shown in the figure. The cooling water circulation pump inlet valve 510 and the cooling water circulation pump outlet valve 530 can control the opening and closing of the inlet and outlet of the cooling water circulation pump 520, thereby controlling the water flow rate of the cooling water.

[0053] The cooling water discharged from the condenser of the lithium bromide refrigerator 100 exchanges heat with the air in the cooling tower 500, and after the temperature is reduced, it is pressurized by the cooling water circulation pump 520 and then returned to the absorber of the lithium bromide refrigerator 100 to absorb heat.

[0054] In some specific embodiments, in order to collect condensed water after steam condensation, a condensed water pool 700 is also included. The condensed water pool 700 is arranged on the condensed water pipeline connected to the condensed water outlet of the lithium bromide refrigerator 100, and a condensed water valve 720 is arranged on the inlet pipeline of the condensed water pool 700.

[0055] There may be leakage of chilled water during the circulation process, and there may be a problem of insufficient chilled water. Therefore, the cooling system of the blast furnace electric blower unit disclosed in the embodiment of the utility model also includes a chilled water make-up system, and the chilled water make-up system includes a chilled water make-up pipeline. The chilled water make-up pipeline is connected to the first chilled water pipeline, and the chilled water make-up point is located upstream of the chilled water circulation pump 120.

[0056] In order to reduce corrosion to equipment, desalted water is used for chilled water makeup. The chilled water makeup system also includes a desalted water tank 600 arranged on the makeup water pipeline. In order to control the amount of desalted water entering and leaving the desalted water tank 600, a desalted water tank inlet valve 610 is provided on the inlet pipeline of the desalted water tank 600, and a desalted water tank outlet valve 620 is provided on the outlet pipeline of the desalted water tank 600.

[0057] In order to regularly discharge sewage from the cooling system of the blast furnace electric blower unit, a first sewage pipeline is arranged on the first chilled water pipeline. Specifically, the first sewage pipeline can be located downstream of the chilled water circulation pump 120, and a first sewage valve 140 is arranged on the first sewage pipeline. A second sewage pipeline is arranged on the cooling tower 500, and a second sewage valve 540 is arranged on the second sewage pipeline. A third sewage pipeline is arranged on the make-up water pipeline, and a third sewage valve 630 is arranged on the third sewage pipeline.

[0058] Cooling water is lost during the circulation process. In order to replenish cooling water, a cooling system for a blast furnace electric blower unit disclosed in an embodiment of the utility model is provided with a cooling tower make-up pipe on the cooling tower 500, and industrial water is used to replenish cooling water. In order to control the amount of cooling water replenishment, a cooling water make-up valve 550 is provided on the cooling make-up pipe.

[0059] The cooling system of the electric blower unit of a blast furnace disclosed in the embodiment of the utility model has the following working principle: the lithium bromide refrigerator 100 uses low-temperature and low-pressure saturated steam as heat energy for producing chilled water, and the steam after heat exchange becomes condensed water and is recycled to the condensed water pool 700 through the condensed water pipeline; the chilled water produced by the lithium bromide refrigerator 100 is pressurized by the chilled water circulation pump 120 and sent to the first chilled water pipeline, and distributed to the motor air cooler 200, the lubricating oil cooler 300 and the control oil cooler 400 for cooling. The chilled water after cooling is converged to the second chilled water pipeline, and is transported to the lithium bromide refrigerator 100 for circulation cooling through the second chilled water pipeline. When the chilled water is insufficient, the chilled water replenishment system replenishes it. After the cooling water exchanges heat with the lithium bromide refrigerator 100, it is transported to the cooling water tower 500 for cooling. The cooled cooling water is pressurized by the cooling water circulation pump 520 and sent to the lithium bromide refrigerator 100 for heat exchange. When the amount of cooling water is insufficient, it is supplemented by industrial water.

[0060] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0061] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0062] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0063] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A blast furnace electric blower unit cooling system, characterized in that: include: A lithium bromide refrigerator (100), the lithium bromide refrigerator (100) comprising a steam pipeline, a chilled water circuit, a cooling water circuit and a refrigerant circuit; A motor air cooler (200), the motor air cooler (200) being arranged on the chilled water circuit; A lubricating oil cooler (300), wherein the lubricating oil cooler (300) is arranged on the chilled water circuit; A control oil cooler (400), wherein the control oil cooler (400) is arranged on the chilled water circuit; A cooling tower (500), wherein the cooling tower (500) is arranged on the cooling water circuit.

2. The blast furnace electric blower unit cooling system according to claim 1, characterized in that: The chilled water circuit is provided with a chilled water circulation pump (120), and valves are provided on the inlet and outlet pipelines of the chilled water circulation pump (120).

3. The blast furnace electric blower unit cooling system according to claim 2, characterized in that: The chilled water circuit includes a first chilled water pipeline, a second chilled water pipeline, a first chilled water branch, a second chilled water branch and a third chilled water branch; The first chilled water pipeline is connected to a chilled water outlet of the lithium bromide refrigerator (100), the second chilled water pipeline is connected to a chilled water inlet of the lithium bromide refrigerator (100), and the chilled water circulation pump (120) is arranged on the first chilled water pipeline; The first chilled water branch, the second chilled water branch and the third chilled water branch are arranged in parallel between the first chilled water pipeline and the second chilled water pipeline, the motor air cooler (200) is arranged on the first chilled water branch, the lubricating oil cooler (300) is arranged on the second chilled water branch, and the control oil cooler (400) is arranged on the third chilled water branch.

4. The blast furnace electric blower unit cooling system according to claim 1, characterized in that: The cooling water loop is provided with a cooling water circulation pump (520), the cooling water circulation pump (520) is arranged on the outlet pipeline of the cooling tower (500), and valves are arranged at the inlet and outlet of the cooling water circulation pump (520).

5. The blast furnace electric blower unit cooling system according to claim 1, characterized in that: It also includes a condensation water pool (700), wherein the condensation water pool (700) is arranged on a condensation water pipeline connected to a condensation water outlet of the lithium bromide refrigerator (100).

6. The blast furnace electric blower unit cooling system according to claim 3, characterized in that: It also includes a chilled water replenishment system, the chilled water replenishment system includes a chilled water replenishment pipeline, the chilled water replenishment pipeline is connected to the first chilled water pipeline, and the chilled water replenishment point is located upstream of the chilled water circulation pump (120).

7. The blast furnace electric blower unit cooling system according to claim 6, characterized in that: The chilled water replenishment system comprises a desalted water tank (600) arranged on the replenishment pipeline.

8. The cooling system for a blast furnace electric blower unit according to claim 6, characterized in that: The first chilled water pipeline is provided with a first sewage pipeline, the cooling tower (500) is provided with a second sewage pipeline, and the water supply pipeline is provided with a third sewage pipeline.

9. The blast furnace electric blower unit cooling system according to claim 1, characterized in that: The cooling tower (500) is provided with a cooling tower water supply pipe.

10. The blast furnace electric blower unit cooling system according to claim 3, characterized in that: The temperature of the chilled water in the first chilled water pipeline is between 10°C and 15°C.

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