CN205156674U - Closed -system cooling tower system of preventing frostbite - Google Patents

Abstract

The utility model relates to a closed -system cooling tower system of preventing frostbite, include: the cooling tower basis of cooling tower, cooling tower bottom and the heat exchange tube group on cooling tower upper portion, the system still includes a storage water tank, the highest point of storage water tank backward flow mouth is less than the lower of heat exchange tube group's delivery port. Because the utility model discloses it has established the storage water tank to add on the pipeline, the daily operation of the enough systems of volume of storage water tank adds the interior water of closed cooling tower coil pipe and the water reflux of refluxing a part pipeline, water total reflux to storage water tank in postcooling tower heat exchange tube group is shut down to the circulating pump, in the quick discharge of water in guaranteeing heat exchange tube group of constantly admitting air of the drainage admission valve of this in -process cooling tower water inlet, like this when the closed cooling tower was shut down below below zero degree centigrade winter, even operating personnel forgets that it can not lead to hydropexis in the closed cooling tower heat exchange tube group to be freezed yet and cause that the heat exchange tube is freezing to burst apart to close closed cooling tower heat exchange tube group exhaust -valve.

Description

Closed Cooling Tower Antifreeze System

technical field

The utility model relates to an antifreeze system for a closed cooling tower, which solves the problem of freezing and cracking of heat exchange tube groups when the closed cooling tower is shut down below zero degrees Celsius and is not waterproof.

Background technique

Ordinary closed cooling towers are not designed to achieve satisfactory results in antifreeze or do not consider the problem of antifreezing, which makes it very likely that the heat exchange tube group will freeze and crack when the closed cooling tower operates in winter, and the present invention is very Ok solved the problem.

Utility model content

In order to solve the above technical problems, the purpose of this utility model is to provide an antifreeze system for a closed cooling tower, which can prevent the heat exchange tube group from freezing and cracking when the closed cooling tower is shut down below zero degrees Celsius and is not waterproof.

In order to achieve the above object, the technical solution adopted in the utility model is:

A closed cooling tower antifreeze system, comprising: a cooling tower, a cooling tower foundation at the bottom of the cooling tower, and a heat exchange tube group on the upper part of the cooling tower, the water inlet of the heat exchange tube group is located at the upper part of the heat exchange tube group, the The water outlet of the heat exchange tube group is located at the lower part of the heat exchange tube group; the heat exchange tube group is connected in series with a water storage tank, and the water inlet of the water storage tank is located at the upper part of the water storage tank and connected to the water outlet of the heat exchange tube group. The water outlet of the water storage tank is located at the lower part of the water storage tank and connected to the water inlet of the heat exchange tube group, and the water outlet of the heat exchange tube group is higher than the water inlet of the water storage tank.

In the closed cooling tower antifreeze system, a circulating pump, valves and process heating equipment are arranged between the water outlet of the water storage tank and the water inlet of the heat exchange tube group.

In the antifreeze system of the closed cooling tower, the water inlet of the heat exchange tube group is provided with a drain and air intake valve.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages that: the utility model adds a water storage tank on the pipeline, and the volume of the water storage tank is enough for the daily operation of the system and the water in the closed cooling tower coil tube is added. And part of the water return in the return pipe, after the circulation pump stops, the water in the heat exchange tube group of the cooling tower completely returns to the water storage tank. The water in the closed cooling tower is discharged quickly, so that when the closed cooling tower is shut down below zero degrees Celsius in winter, even if the operator forgets to close the emptying valve of the closed cooling tower heat exchange tube group, it will not cause water in the closed cooling tower heat exchange tube group Retention and freezing cause the heat exchange tube to freeze and crack.

Description of drawings

Fig. 1 is the structural diagram of the antifreeze system of the utility model closed cooling tower.

Description of reference signs: 1-water storage tank; 2-circulating pump; 3-valve; 4-process heating equipment; 5-water supply pipeline; 6-cooling tower foundation; 7-cooling tower; 8-heat exchange tube group; 9 - drain intake valve; 10 - return water pipeline.

detailed description

The utility model will be further described below in conjunction with specific embodiments and accompanying drawings, and the advantages and characteristics of the utility model will become clearer along with the description.

As shown in Figure 1, it is a structural schematic diagram of a closed cooling tower antifreeze system of the present invention, including: cooling tower 7, cooling tower foundation 6, heat exchange tube group 8, circulation pump 2, valve 3 and process heating equipment 4.

Wherein, the cooling tower foundation 6 is located at the bottom of the cooling tower 7 and the heat exchange tube group 8 is located at the top of the cooling tower 7, the water inlet of the heat exchange tube group 8 is located at the top of the heat exchange tube group 8, and the heat exchange tube group 8 The water outlet is located at the bottom of the heat exchange tube group 8.

The heat exchange tube group 8 is also connected in series with a water storage tank 1, that is, the water outlet of the water storage tank 1 is connected to the water inlet located at the lower part of the water storage tank 1 and connected to the heat exchange tube group 8, the water outlet of the water storage tank 1 and the heat exchange tube The pipeline between the water inlets of group 8 is the water supply pipeline 5 . Circulating pump 2, valve 3 and process heating equipment 4 are located on the water supply pipeline 5 between the water outlet of the water storage tank 1 and the water inlet of the heat exchange tube group 8, and the water inlet of the water supply pipeline 5 of the heat exchange tube group is A drain intake valve 9 is provided. The circulating pump 2 on the water supply pipeline 5 extracts the cold water in the water storage tank 1 and sends it to the process heating equipment 4 through the valve 3 . The water inlet of the water storage tank 1 is located on the upper part of the water storage tank 1 and is connected to the water outlet of the heat exchange tube group 8 , and the pipeline between the water inlet of the water storage tank 1 and the water outlet of the heat exchange tube group 8 is a return pipe 10 .

The cooling water in the water storage tank 1 is heated by the process heating equipment 4 and then supplied to the cooling tower 7 placed on the cooling tower foundation 6 through the water supply pipeline 5, and the water is cooled after heat exchange in the heat exchange tube group 8 of the cooling tower 7, Then it flows back into the water storage tank 1 through the return water pipeline 10 equipped with the drainage and intake valve 9, so that a complete cycle is completed when the circulating pump 2 is working normally.

However, it can be seen from FIG. 1 that the water outlet of the heat exchange tube group 8 of the present invention is higher than the water inlet of the water storage tank 1 . Therefore, if the circulating water stops flowing after the circulating pump 2 is shut down and the heat exchange tube group 8 is higher than the water storage tank 1 and the water outlet of the heat exchange tube group 8 is directly connected to the water inlet of the water storage tank 1, then the The water in the heat pipe group 8 will naturally flow back into the water storage tank 1 due to gravity, and in the process of backflow, the water will be continuously fed into the drain and intake valve 9, thereby accelerating the return speed of the water in the heat exchange pipe group 8, so that The accident of freezing and cracking of the heat exchange tube group 8 will not occur when the temperature is below zero degrees Celsius and the circulation pump is not working.

It can be known from the above that the utility model has the advantages that: the utility model adds a water storage tank 1 on the pipeline, the volume of the water storage tank 1 is sufficient for the daily operation of the system, and the water in the closed cooling tower coil and part of the return pipeline are added. Water backflow, after the circulating pump 2 stops, the water in the heat exchange tube group of the cooling tower completely returns to the water storage tank 1. In this way, when the closed cooling tower is shut down below zero degrees Celsius in winter, even if the operator forgets to close the exhaust valve of the closed cooling tower heat exchange tube group 8, it will not cause water retention in the closed cooling tower heat exchange tube group 8 Freezing causes the heat exchange tube to freeze and crack.

The above descriptions and examples are only exemplary, and do not constitute any limitation to the scope of the present utility model. Those skilled in the art should understand that, without departing from the spirit and scope of the utility model, the details and forms of the technical solution of the utility model can be modified or replaced, but these modifications and replacements all fall within the protection scope of the utility model .

Claims (3)

1. a sealed cooling tower winterization system, comprise: the cooling tower basis bottom cooling tower, cooling tower and the set of heat exchange tubes on cooling tower top, the water inlet of described set of heat exchange tubes is positioned at the top of set of heat exchange tubes, and the delivery port of described set of heat exchange tubes is positioned at the bottom of set of heat exchange tubes; It is characterized in that, described set of heat exchange tubes is connected a storage tank, and the water inlet of described storage tank is positioned at the top of storage tank and connects the delivery port of set of heat exchange tubes; The delivery port of described storage tank connects the bottom the water inlet connecting set of heat exchange tubes that are positioned at storage tank, and the delivery port of described set of heat exchange tubes is higher than the water inlet of described storage tank.

2. sealed cooling tower winterization system according to claim 1, is characterized in that, is provided with circulating pump, valve and technique heat-producing device between the delivery port of described storage tank and the water inlet of described set of heat exchange tubes.

3. sealed cooling tower winterization system according to claim 2, is characterized in that, the water inlet of described set of heat exchange tubes is provided with draining intake valve.