Cooling water circulation system

Abstract

The utility model provides a cooling water circulation system which comprises a fire pool, an overflow pool, a cooled object, a tank type heat exchanger, a filtering pool, a living pool, a water supplementing water tank of a steam boiler, a bath room for workers of special types of work and a connecting pipeline, and the overflow pool and the filtering pool are arranged on the two sides of the fire pool respectively. The fire pool is communicated with the overflow pool through a water outlet flush with the set water level of the fire pool, the overflow pool is sequentially connected with an object to be cooled and the tank type heat exchanger through pipelines, and the tank type heat exchanger is connected with the filter pool through a pipeline. The water taking end of the tank-type heat exchanger is connected with a living water pool through a pipeline, and the water using end of the tank-type heat exchanger is connected with a water supplementing tank of the steam boiler and a special-type worker bathing room through pipelines; the water containing volume of the fire pool is larger than the cooling pool volume needed by the cooling water system. The device saves investment cost and is water-saving and environment-friendly.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling water circulation, in particular to a cooling water circulation system. Background Art

[0002] Cooling water refers to water used to lower the temperature of the object being cooled, so as to keep the object within the controlled temperature range. Several traditional cooling water circulation methods:

[0003] (1) Circulating cooling water: refers to the method of returning cooling water to the cooling structure for cooling after heat exchange and then recycling it for use after necessary treatment.

[0004] (2) Direct cooling water: refers to the method of discharging cooling water after using it only once during the cooling process.

[0005] (3) Indirect cooling water: refers to the method of indirectly exchanging heat with the cooled object through heat exchange equipment to achieve the purpose of cooling the cooled object.

[0006] The traditional cooling water circulation method has limitations and disadvantages:

[0007] There are generally two ways to use circulating cooling water:

[0008] (1) According to the flow rate and temperature of cooling water per unit time, a corresponding cooling pool is set up. The cooling pool is generally built underground to ensure the low-temperature heat dissipation effect of the cooling pool, and the cost is extremely expensive.

[0009] (2) According to the flow rate and temperature of cooling water per unit time, a cooling tower of corresponding type is set. The principle of cooling water tower to reduce the temperature of cooling water is mainly to lift the temperature-carrying cooling water to the top of the cooling tower through machinery. The cooling water is diverted during the free fall in the tower, and then the cooling water temperature is reduced by blowing air from the fan. However, the cooling method of cooling tower is seriously affected by extreme weather, and the cooling effect is poor in high temperature weather. In low temperature weather, the cooling water in the pipeline needs to be drained when the work is stopped to prevent the pipeline from freezing and cracking. In windy and sandy weather, it is necessary to clean and replace the water in time. Since the cooling tower is an open cooling method, the accumulation of silt can easily cause damage to the circulation pump and blockage of the pipeline. At the same time, there are also practical situations such as high investment in cooling tower construction and high cost of normal circulation of cooling water.

[0010] The use of direct cooling water is extremely wasteful of water resources. It is generally only applicable to areas close to natural water bodies. With the permission of the local environmental protection department, cooling water can be recycled without causing water resource waste.

[0011] When using indirect cooling water, the first requirement is that the demand for cooling water heat energy is greater than the heat energy released by the cooled object. For example, waste heat from a thermal power plant is used to heat residents in some areas. If the waste heat is insufficient, a heating station must be configured, and the heating return water is processed and circulated to cool the power generation equipment. Utility Model Content

[0012] The utility model aims to solve the above problems, thereby providing a cooling water circulation system, which fully absorbs and utilizes the advantages of various traditional cooling water circulation methods, combines its own specific conditions, and forms a set of energy-saving, water-saving and construction investment-saving through the transformation and utilization of existing facilities.

[0013] To achieve the above-mentioned purpose of the utility model, the utility model provides a cooling water circulation system, including a fire water tank, an overflow tank, a cooled object, a tank heat exchanger, a filter tank, a domestic water tank, a steam boiler feed water tank, a special worker bathroom and connecting pipelines. An overflow tank and a filter tank are respectively arranged on both sides of the fire water tank. The fire water tank is connected to the overflow tank through a water outlet flush with its set water level. The overflow tank is connected to the cooled object and the tank heat exchanger in sequence through pipelines. The tank heat exchanger is connected to the filter tank through a pipeline. The filter tank is connected to the fire water tank through a water inlet higher than the set water level of the fire water tank. The water intake end of the tank heat exchanger is connected to the domestic water tank through a pipeline. The water end of the tank heat exchanger is connected to the steam boiler feed water tank and the special worker bathroom through a pipeline. The water capacity of the fire water tank is greater than the volume of the cooling tank required by the cooling water system.

[0014] Furthermore, the effective water volume of the overflow tank is greater than the water capacity of the cooling water pipeline.

[0015] Furthermore, the fire water pool is an underground water pool, and the cooled object and the tank heat exchanger are arranged on the ground higher than the fire water pool.

[0016] The utility model adopts the overflow pool of the fire water tank as the cooling water intake end, and does not need to build a separate underground cooling pool, saving investment costs; the entire process of cooling water circulation is completed in the circulation pipeline and the underground water tank, and the evaporation of cooling water and water pollution are negligible. At the same time, the water in the fire water tank, under the premise of ensuring its required water storage capacity, participates in the cooling, filtering and other circulation processes, and is recycled, saving water and environmental protection; the heat of cooling water is used to heat domestic water, and waste heat is used to save energy; the cooling water return depends on the height difference between the cooled object and the tank heat exchanger and the fire water tank, and does not need a water pump, saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cooling water circulation system structure;

[0018] Figure 2 Schematic diagram of the cross section of the fire water pool, overflow pool and filter pool

[0019] Among them: 1. Fire water tank; 2. Overflow tank; 3. Cooled objects; 4. Tank heat exchanger; 5. Filter tank; 6. Domestic water tank; 7. Steam boiler water supply tank and special workers' bathroom; 8. Filter material; 9. Water inlet; 10. Water outlet. DETAILED DESCRIPTION

[0020] In order to better understand the purpose, structure and function of the utility model, the following is a further detailed description of a cooling water circulation system of the utility model in conjunction with the accompanying drawings.

[0021] Reference Figure 1 The cooling water circulation system includes a fire water tank 1, an overflow tank 2, a cooled equipment 3, a tank heat exchanger 4, a filter tank 5, a domestic water tank 6, a make-up water tank for a steam boiler, a bathroom for employees of special types of work 7, and connecting pipelines. An overflow tank 2 and a filter tank 5 are respectively arranged on both sides of the fire water tank 1. The fire water tank 1 is connected to the overflow tank 2 through a water outlet 10 flush with its set water level. The overflow tank 2 is connected to the tank heat exchanger 4 through a pipeline. The tank heat exchanger 4 is connected to the filter tank 5 through a pipeline. The filter tank 5 is connected to the fire water tank 1 through a water inlet 9 higher than the set water level of the fire water tank 1. The water intake end of the tank heat exchanger 4 is connected to the domestic water tank 6 through a pipeline. The water end of the tank heat exchanger 4 is connected to the make-up water tank for a steam boiler and a bathroom for employees of special types of work 7 through a pipeline.

[0022] Through actual calculations, the water capacity of the fire water tank 1 is larger than the cooling tank volume required by its own cooling water system. The overflow tank 2 of the fire water tank 1 is used as the water intake end of the cooling water system and its volume is increased at the same time, so that the water capacity of the fire water tank is larger than the cooling tank volume required by the cooling water system, and the effective water volume of the overflow tank 2 is larger than the water capacity of the cooling water pipeline. This avoids affecting the effective water guarantee of the fire water tank 1 during the cooling water circulation process, and the fire water tank 1 only plays a cooling role.

[0023] A tank heat exchanger 4 is set at the cooling water return end, that is: after the water in the overflow tank 2 is cooled by the cooling equipment 3 through the pipeline, the heat-carrying cooling water heats the water in the tank of the tank heat exchanger 4. After the heat-carrying cooling water passes through the heat exchange tank, the temperature is reduced once. At the same time, the outlet water temperature of the water end is increased from 15 degrees to 43 degrees. Then, it is filtered by the filter material 8 of the filter tank 5 and flows into the fire water pool 1 for secondary cooling. After the cooling water flows back into the fire water pool 1, it causes the fire water pool 1 to overflow and enter the fire water pool, completing the cycle. The water intake end of the tank is the domestic water pool 6, and the water use end is the steam boiler's water tank and the special workers' bathroom 7. The water in the domestic water pool 6 rises in temperature after flowing through the tank heat exchanger 4 through the pipeline, and is transported to the steam boiler's water tank and the special workers' bathroom 7 through the pipeline, realizing the comprehensive utilization of thermal energy and saving energy.

[0024] The fire water pool 1 is an underground water pool, and the cooled equipment 3 and the tank heat exchanger 4 are arranged on the ground higher than the fire water pool 1 .

[0025] In the cooling water circulation system, the entire cooling water circulation process is completed in the circulation pipe and the fire water pool. The evaporation of cooling water and water pollution are minimal. At the same time, the water in the fire water pool 1 participates in the cooling, filtering and other circulation processes under the premise of ensuring its required water storage capacity. This also avoids the water in the fire water pool 1 from being stored for a long time, causing the water quality to deteriorate, rot and become smelly, and the need to abandon and replace the water in about three years.

[0026] The cooling water circulation system can be compared with other traditional cooling water circulation methods in terms of energy saving, water saving and construction investment saving from precise data:

[0027] (1) Saving natural gas used for steam every day:

[0028] Based on 4 tons / hour of steam, 8 hours of production per day, and 4 tons / day of bathing water.

[0029] Q=Cm△t=4.2J / (kg·℃)×36000kg×(43℃-15℃)

[0030] =4233600J

[0031] 4233600 joules ÷ 4.1868 = 1011178 kcal

[0032] 1011178 kcal ÷ 8000 kcal / m3 natural gas ≈ 126 m3 natural gas

[0033] (2) Save electricity every day:

[0034] The fire water pool of this cooling water circulation system is an underground water pool. The cooled object and the tank heat exchanger are set on the ground higher than the fire water pool. The cooling water returns by gravity back to the fire water pool based on the height difference between the cooled object and the tank heat exchanger and the fire water pool. Compared with the cooling tower method, it saves a 15kw water pump with a head of 15 meters and a 12kw fan of the cooling tower, thus saving 27 kWh×8 hours=216 degrees of electricity per day.

[0035] (3) Water saving: From the previous analysis of several traditional cooling water methods, it can be clearly seen how much water resources this cooling water circulation system can save.

[0036] (4) Construction investment: A. The underground cooling pool generally costs about RMB 6,000 per cubic meter. B. The cooling tower + foundation + water pump is calculated based on the hourly circulating cooling water volume, and the construction investment is RMB 35,000 per cubic meter.

Claims

1. A cooling water circulation system, characterized in that: The invention comprises a fire water pool (1), an overflow pool (2), a cooled object (3), a tank heat exchanger (4), a filter pool (5), a domestic water pool (6), a water supply tank for a steam boiler, a bathroom for employees of special types of work (7), and connecting pipelines. The fire water pool (1) is provided with an overflow pool (2) and a filter pool (5) on both sides. The fire water pool (1) is connected to the overflow pool (2) through a water outlet (10) flush with a set water level line thereof. The overflow pool (2) is connected to the cooled object (3), the tank heat exchanger (4), the filter pool (5) and the domestic water pool (6) in sequence through pipelines. The tank heat exchanger (4) is connected to a filter tank (5) through a pipeline, the filter tank (5) is connected to the fire water tank (1) through a water inlet (9) higher than the set water level of the fire water tank (1), the water intake end of the tank heat exchanger (4) is connected to the domestic water tank (6) through a pipeline, and the water use end of the tank heat exchanger (4) is connected to the steam boiler's water supply tank and a special worker's bathroom (7) through a pipeline; the water storage volume of the fire water tank (1) is greater than the cooling pool volume required by the cooling water system.

2. A cooling water circulation system according to claim 1, characterized in that: The effective water volume of the overflow pool (2) is greater than the water capacity of the cooling water pipeline.

3. A cooling water circulation system according to claim 1, characterized in that: The fire water pool (1) is an underground water pool, and the cooled object (3) and the tank heat exchanger (4) are arranged on the ground higher than the fire water pool (1).

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