CN205138251U - Compound closed circulation water cooling tower's supplementary peak cooling system - Google Patents

Abstract

The utility model belongs to the technical field of cooling and provides an auxiliary peak cooling system of a composite closed-type circulating water cooling tower. The proposed auxiliary peak cooling system of a compound closed-loop water cooling tower has a peak air cooler (2), and the peak air cooler (2) is connected in parallel with the compound closed-loop water cooling tower, and the peak One end of the air cooler (2) is connected to the process circulating water inlet (5), the other end is connected to the process circulating water return (6), and between the peak air cooler (2) and the process circulating water inlet (5) Pipeline valve I (3) is set between the peak air cooler (5) and the process circulating water backwater (6); pipeline valve II (4) is set between the pipeline valve I (3), pipeline valve II ( 4) Shut down when the ambient temperature is lower than the standard design water cut-off temperature or when the ambient temperature is higher than the required water cut-off temperature. The utility model has the advantages of air cooling and evaporative cooling, so that it can save water and run stably.

Description

Auxiliary Peak Cooling System of Composite Closed Circulating Water Cooling Tower

technical field

The utility model belongs to the technical field of cooling, and mainly proposes an auxiliary peak cooling system of a composite closed-type circulating water cooling tower.

Background technique

my country is a water-deficient country, and its per capita fresh water resources are only 1/4 of the world's average level, ranking 110th in the world. It is one of the countries with the poorest per capita water resources in the world. , and the distribution is extremely uneven. According to the "China Statistical Yearbook", the national industrial water consumption in 2014 was 142 billion m ³ , accounting for 22.83% of the total water consumption, while cooling water used as a cooling medium accounted for 70% to 80% of the total industrial water consumption. At the same time, the recycling rate of industrial water in my country is very low. In 2010, the comprehensive recycling rate of water was only 67%, and that in developed countries generally reached 85% to 90%. The issue of resource scarcity is significant.

Cooling tower is one of the cooling equipment that can achieve water recycling effect and is widely used. It uses air to directly or indirectly contact high-temperature hot water to reduce the water temperature and achieve the purpose of recycling industrial water. According to the contact mode of circulating water and air, cooling towers can be divided into two types: open type and closed type. Most of the cooling towers in industrial applications are open cooling towers, which generally have problems such as poor circulating water quality, large water consumption, large energy loss, and high operating costs.

Compared with the open cooling tower, the closed cooling tower dissipates the heat of the circulating water to the ambient air through the heat exchange of the partition wall, avoiding the direct contact between the circulating water and the environment, and there is no loss of circulating water in long-term operation (neglecting system leakage Reason) and reduce the pressure head of the circulating water pump, to achieve the purpose of saving water and energy.

Closed cycle cooling systems generally use air cooling or evaporative cooling. The combination of air cooling and evaporative cooling (composite closed circulating water cooling tower) is more economical than pure air cooling, and the adjustment is more flexible. According to the environmental conditions of the place of use and the user's operating requirements, when designing the compound closed circulating water cooling tower, a water cut-off temperature is generally set, that is, when the ambient temperature is not higher than the design water stop temperature, the compound closed cycle water cooling tower The water cooling tower adopts full dry operation, and the circulating water temperature is lowered by air cooling; when the ambient temperature is higher than the design water cut-off temperature, the evaporative cold spray water is turned on, and the heat of the circulating water is taken away by the evaporation of part of the low-quality spray water , reduce the temperature and meet user requirements.

However, due to the limitation of water-saving indicators in some areas, higher water cut-off temperature is required, and the standard composite closed-loop cooling tower equipment alone cannot meet the water cut-off temperature requirements, or it will bring great difficulties to equipment design and manufacture. , it is necessary to consider the design scheme of the composite closed-loop water cooling tower that meets the higher water cut-off temperature.

Utility model content

In order to solve the above-mentioned technical problems, the purpose of this utility model is to propose an auxiliary peak cooling system for a compound closed circulating water cooling tower.

The technical scheme that the utility model adopts is as follows:

An auxiliary peak cooling system of a composite closed circulating water cooling tower, the composite closed circulating water cooling tower includes an air cooling tube bundle and an evaporative cooling tube bundle; the air cooling tube bundle is located above the evaporative cooling tube bundle; the The inlet of the air-cooled tube bundle is connected to the process circulating water inlet, and the outlet is connected to the inlet of the evaporative cooling tube bundle; the outlet of the evaporative cooling tube bundle is connected to the return water of the process circulating water; when the ambient temperature of the evaporative cooling tube bundle is lower than the standard design water cut-off temperature As an air-cooled tube bundle, directly use air to exchange heat; when the ambient temperature is higher than the standard water stop temperature, the air-cooled tube bundle is used as an auxiliary heat exchange tube bundle for the evaporator tube bundle; the auxiliary peak cooling system has a peak air cooler, and the peak The air cooler is connected in parallel with the composite closed circulating water cooling tower. One end of the peak air cooler is connected to the process circulating water inlet, and the other end is connected to the return water of the process circulating water, and the peak air cooler is connected to the process circulating water. Pipeline valve I is set between the water, and pipeline valve II is set between the peak air cooler and the return water of the process circulating water; the pipeline valve I and pipeline valve II are set when the ambient temperature is lower than the standard design water cut-off temperature or the ambient temperature Shut off when the temperature is higher than the required water shutoff temperature.

The auxiliary peak cooling system of a composite closed circulating water cooling tower proposed by the utility model adopts the above-mentioned technical scheme, and when the ambient temperature is higher than the standard design water cut-off temperature and lower than the required water cut-off temperature, the peak peak is turned on The air cooler uses the extra cooling capacity of the peak air cooler to meet the cooling requirements of the circulating water. At this time, the system still uses air cooling to meet the return water temperature requirements of the circulating water; the utility model not only achieves the water-saving purpose required by the industry, Moreover, the whole system can be optimally combined, flexibly adjusted, and has the advantages of both air cooling and evaporative cooling, so that it can achieve the purpose of water saving and stable operation, which is of great significance to the actual production and application of this industry.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Composite closed circulation water cooling tower, 2. Spike air cooler, 3. Pipeline valve I, 4. Pipeline valve II.

detailed description

The utility model is described in conjunction with accompanying drawing and specific embodiment:

As shown in Figure 1, an auxiliary peak cooling system of a composite closed circulating water cooling tower, the composite closed circulating water cooling tower 1 includes an air cooling tube bundle and an evaporative cooling tube bundle; the air cooling tube bundle is located in the evaporation Above the cooling tube bundle; the inlet of the air-cooling tube bundle is connected to the process circulating water inlet, and the outlet is connected to the inlet of the evaporative cooling tube bundle; the outlet of the evaporative cooling tube bundle is connected to the return water of the process circulating water; the evaporative cooling tube bundle is used when the ambient temperature is low When the standard design water cut-off temperature is used as an air-cooled tube bundle, it directly uses air to exchange heat; when the ambient temperature is higher than the required water-stop temperature, the air-cooled tube bundle is used as an auxiliary heat exchange tube bundle for the evaporating tube bundle; the auxiliary peak cooling system has peak air Cooler 2, the peak air cooler 2 is connected in parallel with the composite closed circulating water cooling tower, one end of the peak air cooler 2 is connected to the process circulating water inlet 5, and the other end is connected to the process circulating water backwater 6 , and a pipeline valve I3 is set between the peak air cooler 2 and the process circulating water inlet 5, and a pipeline valve II4 is set between the peak air cooler 5 and the process circulating water return 6; the pipeline valve I3, the pipeline Valve Ⅱ4 is closed when the ambient temperature is lower than the standard design water cut-off temperature or when the ambient temperature is higher than the required water cut-off temperature.

The working principle of the utility model: when the ambient temperature is lower than the standard design water cut-off temperature, the pipeline valve I3 and pipeline valve II4 are closed, and the composite closed circulating water cooling tower 1 runs dry, and the circulation can be satisfied by air cooling. water return temperature requirements; and when the air temperature is higher than the standard design water cut-off temperature and lower than the required water cut-off temperature, the pipeline valve I3 and pipeline valve II4 are opened at the same time, and the peak air cooler 2 is put into system operation. The additional cooling capacity of the peak air cooler 2 can meet the cooling requirements of the circulating water. At this time, the system still uses air cooling to meet the return water temperature requirements of the circulating water; when the ambient temperature is higher than the required water stop temperature, the composite closed cycle is started. Spray water in the evaporation section of water cooling tower 1, close the pipeline valve I3 and pipeline valve II4, stop the peak air cooler 2, and use the evaporation of part of the low-quality spray water to meet the circulation Water cooling requirements.

The above is only the specific implementation of the utility model, but the design concept of the utility model is not limited thereto, and any insubstantial improvement of the utility model by using this concept should be an act of violating the protection scope of the utility model.

Claims (1)

1. An auxiliary peak cooling system for a composite closed circulating water cooling tower, the composite closed circulating water cooling tower (1) includes an air cooling tube bundle and an evaporative cooling tube bundle; the air cooling tube bundle is located in the evaporative cooling tube bundle above; the inlet of the air-cooled tube bundle is connected to the process circulating water inlet, and the outlet is connected to the inlet of the evaporative cooling tube bundle; the outlet of the evaporative cooling tube bundle is connected to the return water of the process circulating water; the evaporative cooling tube bundle is used when the ambient temperature is lower than the standard When the water cut-off temperature is designed, it is used as an air-cooled tube bundle to directly exchange heat with air; when the ambient temperature is higher than the standard water-off temperature, the air-cooled tube bundle is used as an auxiliary heat exchange tube bundle for the evaporating tube bundle; it is characterized in that: the auxiliary peak cooling system has The peak air cooler (2), the peak air cooler (2) is connected in parallel with the compound closed circulation water cooling tower, and one end of the peak air cooler (2) is connected with the process circulating water inlet (5) , the other end is connected to the process circulating water return water (6), and a pipeline valve I (3) is set between the peak air cooler (2) and the process circulating water inlet (5), and the peak air cooler (5) and Pipeline valve II (4) is set between the return water (6) of the process circulating water; the pipeline valve I (3) and pipeline valve II (4) are set when the ambient temperature is lower than the standard design water cut-off temperature or the ambient temperature is higher than Shut off when water temperature is required.