Polyester resin circulating water system

Abstract

The utility model relates to polyester resin production equipment especially relates to a kind of polyester resin circulating water system;Including: cooling pond and the cooling water tower group being located at the top of the cooling pond;Wherein, the water outlet of cooling pond is connected with the water inlet pipeline of production area;The water outlet of production area is connected with the water inlet pipeline of cooling water tower group;Cooling water tower group includes: first unpowered cooling water tower, second unpowered cooling water tower and mechanical cooling water tower;The water in the cooling pond of the utility model is pressurized by cooling water circulating pump and is supplied to the heat exchanger of production area after heat exchange, and then flows into cooling pond after cooling by cooling water tower group, and the full use of water resources is realized by circulation;The cooling water tower group of the utility model uses unpowered cooling water tower and mechanical cooling water tower mixed configuration, with unpowered cooling water tower as main force to meet full load and conventional condition, with mechanical cooling water tower as auxiliary to supplement under extreme condition, maximize the use of natural energy saving.

Description

Technical Field

[0001] This utility model relates to polyester resin production equipment, and more particularly to a polyester resin circulating water system. Background Technology

[0002] Currently, polyester resin circulating water systems have the following problems: Mechanically powered fan cooling towers have high energy consumption, with motor power consumption being one of the main sources of electricity consumption in the circulating water system, resulting in high system operating costs; mechanically powered fan cooling towers are prone to motor, electrical control, and reducer leakage, oil leakage, burnout, and damage, leading to complex operation and maintenance, high repair costs, and common failure points in motors, bearings, and transmission components, resulting in relatively poor reliability during long-term continuous operation; mechanically powered fan cooling towers generate high mechanical noise during operation, causing noise and vibration impacts on the environment and posing environmental risks; while non-powered fan cooling towers offer significant energy-saving advantages, their unstable cooling capacity and strong dependence on the environment are fatal weaknesses for their application in fine chemicals. Using non-powered fan cooling towers alone is generally too risky, and they typically cannot meet the stringent requirements of fine chemicals. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a polyester resin circulating water system.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A polyester resin circulating water system is provided, comprising: a cooling water tank and a cooling water tower assembly disposed at the top of the cooling water tank;

[0006] The outlet of the cooling water pool is connected to the inlet pipe of the production area; the outlet of the production area is connected to the inlet pipe of the cooling water tower group; the cooling water tower group includes: a first non-powered cooling water tower, a second non-powered cooling water tower, and a mechanical cooling water tower.

[0007] Preferably, a water supply system is connected to one side of the cooling water pool via a pipeline; a first shut-off valve is provided on the pipeline between the water supply system and the cooling water pool.

[0008] Preferably, the cooling water tank is equipped with a float valve.

[0009] Preferably, the cooling water pool includes three outlet pipes, each of which is sequentially equipped with a second shut-off valve, a Y-type filter, a cooling water circulation pump, a check valve, and a first butterfly valve.

[0010] More preferably, a pressure gauge is provided on the water outlet pipe; the pressure gauge is located between the cooling water circulation pump and the check valve, and a third shut-off valve is provided at one end of the pressure gauge.

[0011] Preferably, a first pressure detector, a first temperature detector, and a flow detector are sequentially installed on the pipeline between the outlet of the cooling water pool and the inlet of the production area.

[0012] Preferably, a second temperature detector, a second pressure detector, a ball valve, and a second butterfly valve are sequentially installed on the pipeline between the water outlet of the production area and the water inlet of the cooling tower group.

[0013] Preferably, the first non-powered cooling tower and the second non-powered cooling tower include: a fan and a turbine that drives the fan.

[0014] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0015] In this invention, water in the cooling water tank is pressurized by a cooling water circulation pump and supplied to the heat exchanger in the production area. After heat exchange, the water is cooled by the cooling tower assembly before flowing back into the cooling water tank, thus achieving full utilization of water resources through circulation. The cooling tower assembly of this invention adopts a mixed configuration of non-powered and mechanical cooling towers. The non-powered cooling towers are the main force to meet full load and normal operating conditions, while the mechanical cooling towers are used as an auxiliary in extreme operating conditions, maximizing the use of natural cooling sources for energy saving. This invention uses an intelligent control system to dynamically adjust the fan speed according to the water temperature setpoint and the actual ambient humidity and temperature to avoid overcooling or insufficient cooling. It integrates the control of the start-up and shutdown of the mechanical and non-powered cooling towers and the adjustment of the water pumps. Based on multiple parameters such as real-time water supply temperature, load, and ambient humidity and temperature, it automatically switches and adjusts the operating status of different cooling towers and the fan speed to achieve optimal global operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the process flow of a polyester resin circulating water system in one embodiment of the present invention.

[0017] The reference numerals in the figure include:

[0018] Cooling water tank 1; float valve 101; cooling tower assembly 2; first non-powered cooling tower 201; second non-powered cooling tower 202; mechanical cooling tower 203; first shut-off valve 3; second shut-off valve 4; Y-type filter 5; cooling water circulation pump 6; check valve 7; first butterfly valve 8; pressure gauge 9; third shut-off valve 10; first pressure detector 11; first temperature detector 12; flow detector 13; second temperature detector 14; second pressure detector 15; ball valve 16; second butterfly valve 17. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0022] Example

[0023] This embodiment provides a polyester resin circulating water system, including: a cooling water tank 1 and a cooling water tower assembly 2 disposed at the top of the cooling water tank 1;

[0024] The cooling water tank 1 has its outlet connected to the inlet pipe of the production area; a water supply system is connected to one side of the cooling water tank 1; a first shut-off valve 3 is installed on the pipe between the water supply system and the cooling water tank 1; a float valve 101 is installed inside the cooling water tank 1; the cooling water tank 1 includes three outlet pipes, each of which is sequentially equipped with a second shut-off valve 4, a Y-type filter 5, a cooling water circulation pump 6, a check valve 7, and a first butterfly valve 8; a pressure gauge 9 is installed on the outlet pipe; the pressure gauge 9 is located between the cooling water circulation pump 6 and the check valve 7, and a third shut-off valve 10 is installed at one end of the pressure gauge 9; a first pressure detector 11, a first temperature detector 12, and a flow detector 13 are sequentially installed on the pipe between the outlet of the cooling water tank 1 and the inlet of the production area.

[0025] The outlet of the production area is connected to the inlet pipe of the cooling tower group 2; a second temperature detector 14, a second pressure detector 15, a ball valve 16 and a second butterfly valve 17 are sequentially installed on the pipe between the outlet of the production area and the inlet of the cooling tower group 2; the cooling tower group 2 includes: a first non-powered cooling tower 201, a second non-powered cooling tower 202 and a mechanical cooling tower 203; the first non-powered cooling tower 201 and the second non-powered cooling tower 202 include: a fan and a turbine that drives the fan.

[0026] The principle is as follows:

[0027] Initially, water is supplied to the cooling water tank 1 by the water supply system. The cooling water circulation pump 6 is then turned on, allowing the cooling water in the cooling water tank 1 to pass through the outlet pipe and be detected sequentially by the first pressure detector 11, the first temperature detector 12, and the flow detector 13 before entering the production area. After heat exchange in the production area, the cooling water is detected by the second temperature detector 14 and the second pressure detector 15 before entering the cooling water tower group 2 for cooling and flowing back into the cooling water tank 1 for the next circulation. When the ambient temperature and humidity are low, the wind is strong, and the circulating water supply temperature meets the process requirements, the first non-powered cooling water tower 201 and the second non-powered cooling water tower 202 are turned on first or only. The turbine device converts water pressure into mechanical energy, driving the fan blades to rotate. Combined with the wind, this produces excellent ventilation. The circulating water is cooled through air-water countercurrent heat exchange, requiring no additional electricity. During periods of high temperature and humidity, when the wind is insufficient, or when the circulating water supply temperature does not meet the process requirements, the mechanical cooling water tower 203 is turned on to ensure the temperature control effect of the cooling water tower group 2.

[0028] In summary, the water in the cooling water tank of this invention is pressurized by a cooling water circulation pump and supplied to the heat exchanger in the production area for heat exchange. After being cooled by the cooling water tower group, it flows into the cooling water tank, thus achieving full utilization of water resources through circulation. The cooling water tower group of this invention adopts a mixed configuration of non-powered cooling water towers and mechanical cooling water towers. The non-powered cooling water towers are the main force to meet full load and normal working conditions, while the mechanical cooling water towers are used as an auxiliary to supplement under extreme working conditions, maximizing the use of natural cold sources for energy saving.

[0029] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polyester resin circulating water system, characterized in that, include: Cooling water pool (1) and cooling water tower assembly (2) located at the top of the cooling water pool (1); The outlet of the cooling water pool (1) is connected to the inlet pipe of the production area; the outlet of the production area is connected to the inlet pipe of the cooling water tower group (2); the cooling water tower group (2) includes: a first non-powered cooling water tower (201), a second non-powered cooling water tower (202) and a mechanical cooling water tower (203).

2. The polyester resin circulating water system according to claim 1, characterized in that, A water supply system is connected to one side of the cooling water pool (1); a first shut-off valve (3) is provided on the pipeline between the water supply system and the cooling water pool (1).

3. The polyester resin circulating water system according to claim 1, characterized in that, The cooling water tank (1) is equipped with a float valve (101).

4. The polyester resin circulating water system according to claim 1, characterized in that, The cooling water tank (1) includes three outlet pipes, each of which is equipped with a second shut-off valve (4), a Y-type filter (5), a cooling water circulation pump (6), a check valve (7), and a first butterfly valve (8) in sequence.

5. The polyester resin circulating water system according to claim 4, characterized in that, A pressure gauge (9) is provided on the water outlet pipe; the pressure gauge (9) is located between the cooling water circulation pump (6) and the check valve (7), and a third shut-off valve (10) is provided at one end of the pressure gauge (9).

6. The polyester resin circulating water system according to claim 1, characterized in that, A first pressure detector (11), a first temperature detector (12), and a flow detector (13) are sequentially installed on the pipeline between the outlet of the cooling water pool (1) and the inlet of the production area.

7. The polyester resin circulating water system according to claim 1, characterized in that, A second temperature detector (14), a second pressure detector (15), a ball valve (16), and a second butterfly valve (17) are sequentially installed on the pipeline between the water outlet of the production area and the water inlet of the cooling tower group (2).

8. The polyester resin circulating water system according to claim 1, characterized in that, The first non-powered cooling tower (201) and the second non-powered cooling tower (202) include: a fan and a turbine that drives the fan.

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