CN202734381U - System for reducing energy consumption of circulating water pump - Google Patents
System for reducing energy consumption of circulating water pump Download PDFInfo
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- CN202734381U CN202734381U CN201220443190.0U CN201220443190U CN202734381U CN 202734381 U CN202734381 U CN 202734381U CN 201220443190 U CN201220443190 U CN 201220443190U CN 202734381 U CN202734381 U CN 202734381U
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- heat exchanger
- water
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- circulating pump
- transfer device
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Abstract
The utility model discloses a system for reducing energy consumption of a circulating water pump. The system comprises open type system circulating pumps (16), the vast majority of heat exchangers (15), a closed type system circulating pump (12), local heat exchangers (14), a secondary exchange heat exchanger (13) and a closed type system pressure stabilizing tank (11). The open type system circulating pumps (16), a cold-side water inlet of the secondary exchange heat exchanger (13) and the vast majority of heat exchangers (15) are sequentially connected to form an open type circulating water system. The closed type system pressure stabilizing tank (11), the closed type system circulating pump (12), a hot-side water inlet of the secondary exchange heat exchanger (13) and the local heat exchangers (14) are sequentially connected to form a closed type circulating water system. The system for reducing energy consumption of the circulating water pump is used for changing a current cooling circulating water system into a closed and opened type combined system from a singly-opened type system.
Description
Technical field
The utility model belongs to cooling circulating water system Optimization of Energy Saving technical field, relates to especially a kind of system that reduces the water circulating pump energy consumption.
Background technology
Cooling circulating water system is widely used in each production fields such as iron and steel, PETROLEUM PROCESSING, chemical industry, thermoelectricity, especially chemical industry, each water cooling heat exchanger position just differs, according to existing chemical process device is understood, most heat exchanger positions are below 20m in one cover system, the fraction heat exchanger is arranged higher, reaches more than the 30m.Cooling circulating water system is as important auxiliary facility in the art production process, by water circulating pump cooling water is delivered to each heat exchanger heat exchange cooling, cooled recirculated water is transported to the cooling tower cooling by the road, forms the cooling circulating water system of a cover open type.Determine the water pump nominal parameter according to the least favorable situation during design, wherein metered flow is according to the high state design of system's maximum heating load, environment temperature; Rated head can satisfy the least favorable point according to circulation and design.The needed energy consumption of water pump is directly proportional with the pump head first power, therefore, often cause in order to satisfy the requirement of least favorable point (peak) pressure of supply water and significantly improve the whole pressure of supply water of pumping plant, directly cause the Design of Pump Station energy consumption to rise significantly, simultaneously, also cause the obviously phenomenon of waste of low district's heat exchanger heat exchange pressure of supply water.
Therefore, for the defects that exists in the present prior art, be necessary to study in fact, so that a kind of energy-conservation design system to be provided, realize the Energy Intensity Reduction of cooling circulating water system water pump.
The utility model content
For addressing the above problem, the purpose of this utility model is to provide a kind of system that reduces the water circulating pump energy consumption, is used for current cooling circulating water system is designed to the system that open type combines with enclosed by single open system.
For achieving the above object, the technical solution of the utility model is:
A kind of system that reduces the water circulating pump energy consumption comprises open system circulating pump, most heat exchanger, closed system circulating pump, Local Heat Transfer device, secondary exchange heat exchanger and closed system vacuum tank,
Wherein most heat exchangers and local heat exchanger are respectively according to each water cooling heat exchanger and arrange height relationships, system is divided into two parts, a part is to be in the following most heat exchangers of certain altitude, a part is to be in the high Local Heat Transfer device of location comparison in addition, wherein requires most heat exchangers extreme higher position and Local Heat Transfer device extreme lower position to differ more than 5 meters and Local Heat Transfer device flow accounts for total flow below 10%;
Described secondary exchange heat exchanger is arranged in below most heat exchangers extreme higher position;
Described open system circulating pump, secondary exchange heat exchanger cold side water inlet and most heat exchanger are in turn connected to form the open circulation water system;
Described closed system vacuum tank, closed system circulating pump, secondary exchange exchanger heat side water inlet, Local Heat Transfer device are in turn connected to form closed circle water system.
Compared with prior art, the utility model is designed to the system that open type combines with enclosed with current cooling circulating water system by single open system.Open system is to satisfy a circulation of the low district of overwhelming majority heat exchanger pressure of supply water requirement, and most heat exchangers require pressure not high, can effectively reduce the needed lift of water circulating pump, effectively reduce pump station of recirculation water energy consumption demand.Closed system is to be in the circulation that the high Local Heat Transfer device of location comparison forms separately a sealing, by secondary heat exchanger and the water of open type that newly increases closed recirculating is carried out the heat exchange cooling, although closed circle water system supply heat exchanger location comparison is high, but since the heat exchanger backwater can effective supply to closed cycle unit fixed on water pump suction very high pressure, the closed cycle pump head only need to overcome pipe resistance and get final product, compare with existing partial Pressure mode, energy consumption is lower.
Description of drawings
Fig. 1 is the structural representation of the reduction cooling circulating water system pump energy consumption of the utility model embodiment;
Fig. 2 is the structural representation of application example of the reduction cooling circulating water system pump energy consumption of the utility model embodiment.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
On the contrary, the utility model contain any by claim definition in substituting of making of marrow of the present utility model and scope, modification, equivalent method and scheme.Further, in order to make the public the utility model is had a better understanding, in hereinafter details of the present utility model being described, detailed some specific detail sections of having described.There is not for a person skilled in the art the description of these detail sections can understand the utility model fully yet.
With reference to figure 1, be depicted as the structural representation of the reduction cooling circulating water system pump energy consumption of the utility model embodiment, the system that reduces the water circulating pump energy consumption comprises open system circulating pump 16, overwhelming majority heat exchanger 15, closed system circulating pump 12, Local Heat Transfer device 14, secondary exchange heat exchanger 13 and closed system vacuum tank 11, wherein most heat exchangers 15 and local heat exchanger 11 are respectively according to each water cooling heat exchanger and arrange height relationships, system is divided into two parts, a part is to be in the following most heat exchangers 15 of certain altitude, a part is to be in the high Local Heat Transfer device 11 of location comparison in addition, wherein requires most heat exchangers 15 extreme higher positions and Local Heat Transfer device 11 extreme lower positions to differ more than 5 meters and Local Heat Transfer device 11 flows account for total flow below 10%; Secondary exchange heat exchanger 13 is arranged in below most heat exchangers 15 extreme higher positions; Open system circulating pump 16, secondary exchange heat exchanger 13 cold side water inlets and most heat exchanger 15 are in turn connected to form the open circulation water system; Closed system vacuum tank 11, closed system circulating pump 12, secondary exchange heat exchanger 13 hot side water inlets, Local Heat Transfer device 14 are in turn connected to form closed circle water system.
By above technical scheme, reduce open system and supply water to the height of extreme higher position heat exchanger, can reduce open circulation water pump water supply lift, former open type supply-water pump is changed, reach the purpose that reduces energy consumption.
Clearer in order to make the utility model reduce system and the advantage of water circulating pump energy consumption, below in conjunction with accompanying drawing 2 and Jiangsu aniline unit, the utility model is further elaborated.Should be appreciated that concrete application example described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The Jiangsu aniline unit is produced 30000 tons of aniline, 50,000 tons of nitrobenzene per year, rectifying column cat head condenser in the process units (water supply arm DN65) is positioned at high 31.5m place, primary distillation tower overhead condenser (water supply arm DN100) is positioned at high 25m place, and other each heat exchangers are arranged in below the height 17.3m.The requirement of system design Total Water is 1600t/h, normally moves 2 water circulating pumps (the single pump metered flow is 800t/h).
Because the highest water supply point of system is 31.5m, regulate by backwater valve, make water main's pressure maintain 0.38MPa, the calculating lift is 38m, the supply total flow reaches the rated designs requirement, is 1600t/h.According to in-site measurement, 2 pump operating cycle power are respectively 124.5kW, 131.5kW.
Utilize the embodiment of this utility model, reduce the circulation pump energy consumption and carry out according to following steps:
1, arranges height according to system heat exchanger, system is divided into two parts, wherein a part is the Local Heat Transfer device 14 of primary distillation tower overhead condenser 142 of rectifying column cat head condenser 141, the 25m of height 31.5m, a part is the following most heat exchangers 15 of 17.3m in addition, and high district heat exchanger is cooled off according to the enclosed water system, low district heat exchanger cools off according to open-stored water system, simultaneously, utilizes open water system that closed Water System is lowered the temperature.
2, according to height district two groups of heat exchanger models specification and configuration caliber, after calculating high district heat exchanger water requirement and keeping certain rich amount, water requirement is 22+53=75t/h
3, according to the overhead condenser thermic load value, select plate type heat exchanger, heat exchange area is 1.2 square meters, its specified internal resistance is 8m;
4, calculating formula calculation of closed circulation pipeline friction loss according to pipeline pressure is 1.7m, according to the overhead condenser nominal parameter, determine that the internal resistance of overhead condenser standard is 6m, then the closed circle water system drag overall is 6+1.7+8=15.7m, and the closed cycle pump head is according to 1.15 * 15.7=18m;
6, select closed system water circulating pump 12, parameter is 75t/h, 18m, 82%, 5kW;
7, disconnect former open system to two overhead condenser water supply lines and water return pipeline, change open system into and directly be supplied to secondary heat exchanger 13 cold water side imports, behind secondary heat exchanger 13, backwater is back to the open system water return pipeline;
8, closed system water circulating pump 12 is installed, is supplied water to secondary heat exchanger 13 hot side water inlets, hot side water return outlet is by 2 overhead condenser imports, and closed cycle water is back to the closed system pump inlet again after the overhead condenser heat exchange, so move in circles.In order to keep closed circle water system pressure, at closed cycle unit fixed on water pump suction place one cover voltage stabilization water filling device is installed, comprise and close chilled water system vacuum tank 11, closed cold pump and electric control system thereof;
9, drop to 17.3m because of open circulation water system supply peak by original 31.5m, water main's pressure is on an equal basis amplitude downward modulation also, lower modulation is 14.2m, then after the system reform, open circulation water pump 6 actual needs lifts are 38-14.2=23.8m, and pump head is according to 1.1 * 23.8=26m;
10, select 2 on efficient open circulation water pump to replace original 2 circulating pumps, parameter is 800t/h, 26m, 86%, 73kW.
By the adjustment of above system and scrap build, power savings is as follows:
Energy-conservation front recirculated water power consumption general power: 124.5+131.5=256kW;
Comprise closed cycle pump recirculated water power consumption general power: 2 * 73+5=151kW after energy-conservation;
Hour amount of electricity saving: the 256-151=105 degree/hour, power saving rate is 41%.
This system's year operation 300 days moves 24 hours every day, and then a year amount of electricity saving is:
105 * 24 * 300=756000 degree/year, the power savings highly significant.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (1)
1. system that reduces the water circulating pump energy consumption, it is characterized in that, comprise open system circulating pump (16), most heat exchanger (15), closed system circulating pump (12), Local Heat Transfer device (14), secondary exchange heat exchanger (13) and closed system vacuum tank (11)
Wherein most heat exchangers (15) and local heat exchanger (11) are respectively according to each water cooling heat exchanger and arrange height relationships, system is divided into two parts, a part is to be in the following most heat exchangers (15) of certain altitude, a part is to be in the high Local Heat Transfer device (11) of location comparison in addition, wherein requires most heat exchangers (15) extreme higher position and Local Heat Transfer device (11) extreme lower position to differ more than 5 meters and Local Heat Transfer device (11) flow accounts for total flow below 10%;
Described secondary exchange heat exchanger (13) is arranged in most heat exchangers (15) below the extreme higher position;
Described open system circulating pump (16), secondary exchange heat exchanger (13) cold side water inlet and most heat exchanger (15) are in turn connected to form the open circulation water system;
Described closed system vacuum tank (11), closed system circulating pump (12), the hot side water inlet of secondary exchange heat exchanger (13), Local Heat Transfer device (14) are in turn connected to form closed circle water system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220443190.0U CN202734381U (en) | 2012-08-31 | 2012-08-31 | System for reducing energy consumption of circulating water pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220443190.0U CN202734381U (en) | 2012-08-31 | 2012-08-31 | System for reducing energy consumption of circulating water pump |
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| CN202734381U true CN202734381U (en) | 2013-02-13 |
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| CN201220443190.0U Expired - Lifetime CN202734381U (en) | 2012-08-31 | 2012-08-31 | System for reducing energy consumption of circulating water pump |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776215A (en) * | 2014-02-14 | 2014-05-07 | 张高博 | Device side based circulating fluid system optimization method |
| CN104864659A (en) * | 2015-05-20 | 2015-08-26 | 郑成勋 | Cooling water energy-saving circulating system |
| CN106759637A (en) * | 2017-02-24 | 2017-05-31 | 长江勘测规划设计研究有限责任公司 | The technical water supply system that power station open and close type is combined |
| CN107782167A (en) * | 2017-10-27 | 2018-03-09 | 珠海格力电器股份有限公司 | A kind of cooling-water machine system |
-
2012
- 2012-08-31 CN CN201220443190.0U patent/CN202734381U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776215A (en) * | 2014-02-14 | 2014-05-07 | 张高博 | Device side based circulating fluid system optimization method |
| CN104864659A (en) * | 2015-05-20 | 2015-08-26 | 郑成勋 | Cooling water energy-saving circulating system |
| CN106759637A (en) * | 2017-02-24 | 2017-05-31 | 长江勘测规划设计研究有限责任公司 | The technical water supply system that power station open and close type is combined |
| CN107782167A (en) * | 2017-10-27 | 2018-03-09 | 珠海格力电器股份有限公司 | A kind of cooling-water machine system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20130213 |