Water chilling unit load comprehensive utilization device

Abstract

The utility model relates to a water chilling unit load comprehensive utilization device which comprises a water chilling unit evaporator connected with a water outlet pipeline and a water return pipeline, and chilled water passes through the water return pipeline; the number of the evaporators is at least one, and the evaporators are connected to the water return pipeline in parallel through pipelines; and the booster pump is connected to the pipeline where the evaporator is located in series, the booster pump is used for pumping water in the water return pipeline to the evaporator for cooling, and the water can flow back to the water return pipeline after being cooled by the evaporator. The utility model relates to a comprehensive utilization device for load of a water chilling unit, which relates to the technical field of water chilling machines and is characterized in that the load of the unit is increased through an external device, so that the unit operates in a rated working condition, potential safety hazards are reduced, the temperature in a unit plant is reduced by utilizing surplus cold energy of the unit, and the unit operates in a better environment. The unit service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of chillers, in particular to a comprehensive load utilization device for a chiller unit. Background Art

[0002] At present, many chemical plants have chillers, which include centrifuges and screw chillers. After long-term use, these chillers will more or less encounter some problems, such as:

[0003] 1. These chillers are typically purchased during the initial construction phase of a factory, and most are designed for full-load operation. Since factories cannot always operate at full capacity, these chillers often operate below their optimal efficiency point, resulting in poor efficiency, high energy consumption, and wasted cooling capacity. Most of these chillers operate far below their rated load. When the load falls below 30%, they experience surge and flow loss, increasing the risk of damage to the main shaft, gears, impellers, and oil seals. These units, operating at low load for extended periods, present inherent damage risks and are not conducive to long-term operation.

[0004] 2. Most of these units are designed to be installed in factories. In summer, although there are ventilation fans in the factories, the temperature inside the factories is relatively high, which will cause the operating temperature of the units to be high. Long-term operation of the units in a high-temperature environment will lead to aging of electrical components and seals, etc., which brings hidden dangers to the long-term operation of the units. Utility Model Content

[0005] To this end, the technical problem to be solved by the present invention is to overcome the problems in the existing technology. First, the chiller cannot operate at the optimal efficiency point, resulting in poor unit efficiency, high energy consumption ratio, and waste of resources; secondly, long-term low-load operation will cause unit surge, shedding, and abnormal wear of core components; in addition, the temperature of these chiller plants has been high in summer, and since the plant is large, the electricity consumption of installing air conditioners is extremely high.

[0006] In order to solve the above technical problems, the utility model provides a comprehensive utilization device for the load of a chiller, including: a water-cooled unit evaporator, which is connected to a water outlet pipe and a return pipe, and chilled water passes through the return pipe; an evaporator, which is provided with at least one, and the evaporator is connected in parallel to the return pipe through a pipe; a booster pump, which is connected in series to the pipe where the evaporator is located, and the booster pump is used to pump water in the return pipe to the evaporator for cooling, and the water in the evaporator will flow back to the return pipe after cooling.

[0007] In one embodiment of the present invention, the input end of the boost pump is connected to pipeline 1, and the output end of the boost pump is connected to pipeline 2, the other end of pipeline 1 away from the boost pump is connected to the return pipeline, and the other end of pipeline 2 away from the boost pump is connected to the evaporator, and pipeline 1 and the return pipeline are connected by a tee.

[0008] In one embodiment of the present invention, the evaporators are provided in four sets, and the four sets of evaporators are provided in parallel.

[0009] In one embodiment of the present invention, a third pipeline is provided between the evaporator and the return water pipeline, and the third pipeline is connected to the return water pipeline via a tee.

[0010] In one embodiment of the present invention, a manual valve 1 is connected to the pipeline 1.

[0011] In one embodiment of the present invention, a manual valve 2 and an automatic valve 1 are connected to the pipeline 3.

[0012] In one embodiment of the present invention, a manual valve three and an automatic valve two are connected to the return water pipeline.

[0013] In one embodiment of the present invention, the lift of the booster pump is 50 meters, and the flow rate of the booster pump is 60 cubic meters per hour.

[0014] In one embodiment of the present invention, the cooling capacity of the evaporator is 400KW, and the circulating air volume of the evaporator is 2000 cubic meters per hour.

[0015] In one embodiment of the present invention, the material of pipeline 1, pipeline 2 and pipeline 3 is SS304 stainless steel.

[0016] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0017] The comprehensive utilization device for the chiller load described in the present invention increases the load of the unit through an external device, so that the unit operates under rated working conditions, reducing safety hazards, and utilizes the surplus cooling capacity of the unit to reduce the temperature in the unit plant, so that the unit operates in a better environment and extends the service life of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model and in conjunction with the accompanying drawings, wherein

[0019] Figure 1 This is a structural diagram of a chiller load comprehensive utilization device in a preferred embodiment of the present utility model.

[0020] Explanation of the reference numerals in the accompanying drawings in the specification: water-cooling unit evaporator 1, water outlet pipe 11, return pipe 12, manual valve three 121, automatic valve two 122, evaporator 2, booster pump 3, pipe one 31, manual valve one 311, pipe two 32, pipe three 33, manual valve two 331, automatic valve one 332. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. Example

[0022] Reference Figure 1 As shown, the utility model of the chiller load comprehensive utilization device includes three main parts: a water-cooled unit evaporator 1, an evaporator 2, and a booster pump 3. The water-cooled unit evaporator 1 is connected to a water outlet pipe 11 and a return pipe 12, and the return pipe 12 passes chilled water; there is at least one evaporator 2, which is connected in parallel to the return pipe 12 through pipes; the booster pump 3 is connected in series to the pipe where the evaporator 2 is located, and the booster pump 3 is used to pump water in the return pipe 12 to the evaporator 2 for cooling. After the evaporator 2 is cooled, the water flows back to the return pipe 12. The utility model is achieved by adding a set of air-cooled evaporators 2 to the return pipe 12 of the chilled water.

[0023] In the above structure, the input end of the booster pump 3 is connected to pipeline 1 31, and the output end of the booster pump 3 is connected to pipeline 2 32. The other end of pipeline 1 31, away from the booster pump 3, is connected to the return line 12, and the other end of pipeline 2 32, away from the booster pump 3, is connected to the evaporator 2. Pipeline 1 31 and the return line 12 are connected via a tee. Pipeline 3 33 is provided between the evaporator 2 and the return line 12, and pipeline 3 33 and the return line 12 are connected via a tee. Manual valve 1 31 is connected to pipeline 1 31. Manual valve 2 331 and automatic valve 1 332 are connected to pipeline 3 33. Manual valve 3 121 and automatic valve 2 122 are connected to the return line 12. Manual valve 3 121 and automatic valve 2 122 are located between the intersection of the evaporator 2 and the return line 12.

[0024] This is achieved by controlling the opening of two automatic valves, automatic valve 1 332 and automatic valve 2 122. When the unit load is low, the main valve is closed and the evaporation system valve is opened. When the unit load is high, the main valve is opened and the evaporation system valve is closed. This device sets a constant pressure system, and the operating frequency of the booster pump is driven by the high and low pressure sensors to ensure that the system has a constant pressure.

[0025] In the above structure, the evaporators 2 are provided in four sets, and the four sets of evaporators 2 are provided in parallel. Example

[0026] Based on the structure of the first embodiment, the selection of components in the comprehensive utilization device of the chiller load of the present invention can be referred to as follows: the material of pipeline 1 31, pipeline 2 32 and pipeline 3 33 and the flanges connected thereto are SS304 stainless steel, the manual valve 1 311, manual valve 2 331 and manual valve 3 121 can choose 4"CL150 manual valves made of SS304, the automatic valve 1 332 and automatic valve 2 122 can choose 4"CL150 automatic regulating valves made of SS316, the lift of the booster pump 3 is 50 meters, the flow rate is 60 cubic meters / hour, and the material is SS304. The four sets of air-cooled evaporators 2 have a cooling capacity of 400KW per group and a circulating air volume of 2000 cubic meters / hour, and are made of SS304. The frequency of the fan is controlled by the system return water temperature sensor. The connection relationship of the above components can be found in the attached figure. Figure 1 .

[0027] The specific implementation process of the chiller load comprehensive utilization device of the utility model is as follows:

[0028] Find a straight section of approximately three meters long on the return water pipe 12 of the water-cooling unit, with two square meters of free space around it. Cut off a suitable length of this three-meter straight pipe and add two tees at each end of the free straight pipe. Connect Pipeline 1 31 and Pipeline 3 33 through the two tees. Three manual valves 1 311, 2 331, and 3 121, two automatic valves 1 332 and 2 122, and their connected pipes, are responsible for the water outlet and return, respectively. Each of the two tees is equipped with a separate manual valve 2 331 and manual valve 3 121. Two automatic valves 1 332 and 2 122 are installed after the manual valves on the bypass and water inlet pipes, respectively. Add a booster pump 3 after the outlet tee valve group to compensate for pressure loss.

[0029] Evaporator 2 uses high-efficiency stainless steel finned evaporator tubes. Given a cooling capacity of 400 kW per group, 80 square meters of finned evaporator tubes are required. These finned heat exchange tubes are then divided evenly into four groups, each approximately one meter long, and connected in parallel. Four aluminum square boxes, one meter long, thirty centimeters wide, and fifty centimeters high, are constructed. The heat exchange finned tubes are placed at one end of the box, while a first-level energy-efficient fan with a capacity of 500 cubic meters per hour is connected to the other end. The four completed evaporator 2 groups are then installed at the four corners of the factory building and connected to the return water line 12 via pipes.

[0030] The specific application of this utility model's comprehensive load utilization device for chillers is as follows: The total cooling capacity of the chiller is 2800 kW. The chiller operates for approximately 8000 hours per year, with an actual cooling output of 1120 kW for 6000 hours and 800 kW for 2000 hours, resulting in an average annual surplus cooling capacity of approximately 1840 kW. Each evaporator requires a cooling capacity of approximately 400 kW, an exhaust temperature of 18°C ​​for each evaporator fan, and a circulating exhaust volume of 2000 m³. The chiller room measures 36 x 12 x 10 m, allowing the room temperature to be lowered to 24°C in summer.

[0031] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A comprehensive utilization device for chiller loads, characterized by: include, The evaporator of the water-cooling unit is connected to a water outlet pipe and a water return pipe, and the return pipe is filled with chilled water; There is at least one evaporator, and the evaporator is connected in parallel to the return water pipeline through a pipeline; The booster pump is connected in series to the pipeline where the evaporator is located. The booster pump is used to pump water in the return pipeline to the evaporator for cooling, and the water in the evaporator will flow back to the return pipeline after cooling.

2. The chiller load comprehensive utilization device according to claim 1, characterized in that: The input end of the booster pump is connected to pipeline 1, and the output end of the booster pump is connected to pipeline 2. The other end of pipeline 1 away from the booster pump is connected to the return pipeline, and the other end of pipeline 2 away from the booster pump is connected to the evaporator. Pipeline 1 and the return pipeline are connected by a tee.

3. The chiller load comprehensive utilization device according to claim 1, characterized in that: The evaporators are arranged in four sets, and the four sets of evaporators are arranged in parallel.

4. The chiller load comprehensive utilization device according to claim 2, characterized in that: A third pipeline is provided between the evaporator and the return water pipeline, and the third pipeline is connected to the return water pipeline via a tee.

5. The chiller load comprehensive utilization device according to claim 4, characterized in that: The pipeline one is connected with a manual valve one.

6. The chiller load comprehensive utilization device according to claim 5, characterized in that: The pipeline three is connected with a manual valve two and an automatic valve one.

7. The chiller load comprehensive utilization device according to claim 6, characterized in that: The return water pipeline is connected with a manual valve three and an automatic valve two.

8. The chiller load comprehensive utilization device according to claim 1, characterized in that: The lift of the booster pump is 50 meters, and the flow rate of the booster pump is 60 cubic meters per hour.

9. The chiller load comprehensive utilization device according to claim 1, characterized in that: The cooling capacity of the evaporator is 400KW, and the circulating air volume of the evaporator is 2000 cubic meters per hour.

10. The chiller load comprehensive utilization device according to claim 4, characterized in that: The material of the pipeline 1, pipeline 2 and pipeline 3 is SS304 stainless steel.

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