CN109539636B - Method for bringing heat of condenser of air cooling box - Google Patents
Method for bringing heat of condenser of air cooling box Download PDFInfo
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- CN109539636B CN109539636B CN201811177444.7A CN201811177444A CN109539636B CN 109539636 B CN109539636 B CN 109539636B CN 201811177444 A CN201811177444 A CN 201811177444A CN 109539636 B CN109539636 B CN 109539636B
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- cooling
- cooling water
- pipeline
- centrifuge
- condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
- B04B15/02—Other accessories for centrifuges for cooling, heating, or heat insulating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/09—Improving heat transfers
Abstract
The invention relates to the technical field of uranium enrichment production cooling, and particularly discloses a method for taking away heat of a condenser of an air cooling box, which comprises the following steps: (1) cooling water of a cooling system of the centrifuge is used as a medium for condensing a refrigerant of the air cooling box; (2) determining the diameter of a conveying pipeline; (3) selecting a centrifuge cooling water circulating water pump with the head lift larger than the head loss as a cooling water power source of the air cooling tank; (4) connecting a pipeline; (5) conveying cooling water of the centrifugal machine to a condenser of an air cooling box by using a circulating water pump of a cooling system of the centrifugal machine; (6) and after the heat of the condenser of the air cooling box is taken away by the cooling water of the centrifugal machine, the cooling water returns to a cooling system of the centrifugal machine and is recycled after heat exchange. The method of the invention utilizes running equipment, pipelines and cooling water resources, solves the problems of large water temperature fluctuation, serious water resource waste, poor water quality, influence on the service life of the condenser of the air cooling box and the like when the domestic water is used as the cooling water, and has the advantages of economy, environmental protection, high safety and reliability.
Description
Technical Field
The invention belongs to the technical field of uranium condensation production cooling, and particularly relates to a method for taking away heat of a condenser of an air cooling box.
Background
With the increasingly outstanding contradiction between economic development and energy supply, energy conservation and emission reduction become basic national policies for realizing national economic safety and sustainable development. Heat emitted by a refrigerant of the existing refrigerating device during condensation is directly discharged and taken away through a cooling tower or domestic water, so that a large amount of water resources and electric energy are wasted. However, when the method of using other refrigerating devices such as the on-site brine unit for secondary utilization of cooling water is adopted, the problems of great loss along the way, power increase of a power source, insufficient cooling water quantity and the like can occur.
Therefore, a new cooling method is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for taking away heat of a condenser of an air cooling box, which can utilize equipment, pipelines and cooling water resources in transportation.
The technical scheme of the invention is as follows:
a method for carrying away heat of a condenser of an air cooling box comprises the following steps:
step one, cooling water of a cooling system of a centrifuge is used as a medium for condensing a refrigerant of an air cooling box, and the cooling system of the centrifuge is formed into a closed loop by a circulating water pump of a cooling system of the centrifuge, a heat exchanger and the centrifuge;
determining the diameter of a conveying pipeline according to the cooling water quantity required by the air cooling box and the maximum economic flow rate in the pipeline;
calculating the head loss of a pipeline connecting cooling water to a cooling system of the condenser of the air cooling box, and selecting a centrifuge cooling water circulating water pump with the head greater than the head loss as a cooling water power source of the air cooling box;
connecting a branch pipe from an outlet pipeline of a circulating water pump of a cooling system of the centrifugal machine, sequentially connecting a cooling water valve of a pressure compensating machine of the cooling system of the centrifugal machine, a cooling water supply pipeline of an air cooling box, a cooling water supply valve of the air cooling box and a cooling water inlet end of a condenser of the air cooling box, and then connecting a cooling water outlet end of the condenser of the air cooling box with one end of a cooling water outlet pipeline of the condenser of the air cooling box; connecting the other end of the cooling water outlet pipeline of the condenser of the air cooling box with a cooling water return valve of a feeding flow pressure compensating machine of a centrifugal machine cooling system and a free valve of a cooling water return pipeline of the centrifugal machine after the cooling water outlet pipeline is connected in parallel;
opening a cooling water valve of a pressure supply and compensation machine of a cooling system of the centrifugal machine, a cooling water supply valve of an air cooling box, a cooling water return valve of a feeding flow pressure compensation machine of the cooling system of the centrifugal machine and a free valve of a cooling water return pipeline of the centrifugal machine, and conveying cooling water of the centrifugal machine to a condenser of the air cooling box by utilizing a circulating water pump of the cooling system of the centrifugal machine;
and step six, the cooling water of the centrifugal machine returns to a cooling system of the centrifugal machine after taking away the heat of the condenser of the air cooling box, and is recycled after heat exchange.
In the second step, through the formula:
calculating the diameter of the pipeline, wherein D is the diameter of the pipeline, and m is the diameter of the pipeline; upsilon-the flow velocity in the pipeline, m/s; q-pipe flow, m3/h。
In step three, the head loss h along the way1＝9.8il，h1-loss of head along the way, KPa; i-hydraulic slope, searching from a water supply and drainage design manual according to the nominal diameter of the pipeline and the flow of the pipeline; l-pipe length, m;
local head loss
h2-local head loss, KPa; xi-local loss coefficient, according to the nominal diameter of pipeline looking for from "water supply and drainage design handbook"; v-flow velocity, m/s;
head loss H ═ H1+h2。
The drift diameters of the feed flow pressure compensating machine cooling water return valve and the free valve of the centrifuge cooling water return pipeline of the centrifuge cooling system in parallel connection are smaller than the inner diameter of the cooling water outlet pipeline of the air cooling box condenser, and the feed flow pressure compensating machine cooling water return valve and the free valve of the centrifuge cooling water return pipeline can shunt cooling water of the air cooling box condenser after the feed flow pressure compensating machine cooling water return valve and the centrifuge cooling water return pipeline are connected in parallel, so that resistance is reduced when the.
And step five, when the water flow in the pipeline is less, only one of a feed flow pressure supplementing machine cooling water return valve and a centrifuge cooling water return pipeline free valve of the centrifuge cooling system can be opened to return cooling water.
And step six, after the heat of the condenser of the air cooling box is taken away by the cooling water of the centrifugal machine, the cooling water returns to a feeding flow pressure supplementing machine cooling water return valve of a cooling system of the centrifugal machine and a free valve of a cooling water return pipeline of the centrifugal machine, enters the cooling system of the centrifugal machine, and is recycled after heat exchange.
Connecting pipes and valves to the running centrifuge cooling system, the continuity and stability of the in-use system is not affected.
The centrifuge cooling system is a desalting and deoxidizing water circulating cooling system, and the pressure and the temperature are constant.
The invention has the following remarkable effects:
(1) the method of the invention utilizes running equipment, pipelines and cooling water resources to introduce cooling water of the centrifuge into the condensing end of the air cooling box to replace a domestic water direct-discharge cooling system at the condensing end of the air cooling box, solves the problems of large water temperature fluctuation, serious water resource waste, poor water quality, influence on the service life of the condenser of the air cooling box and the like when the domestic water is used as the cooling water, and has the advantages of economy, environmental protection, high safety and reliability, and the like.
(2) The method of the invention connects the pipeline and the valve on the cooling system of the running centrifuge, and the continuity and the stability of the system in use are not affected.
(3) The cooling system utilized by the method is a circulating cooling system of the desalting and deoxidizing water, and the pressure and the temperature are constant.
Drawings
FIG. 1 is a schematic view of the pipe connection in the method of the present invention.
In the figure: 1. a centrifuge cooling system circulating water pump; 2. a cooling water valve of the centrifuge cooling system for the pressure compensating machine; 3. a cooling water supply pipeline of the air cooling tank; 4. a cooling water supply valve of the air cooling tank; 5. the cooling water inlet end of the condenser of the air cooling box; 6. a cooling water outlet pipeline of the air cooling box condenser; 7. a cooling water return valve of a feeding flow pressure compensating machine of a centrifuge cooling system; 8. a centrifuge cooling water return pipe free valve.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
A method for carrying away heat of a condenser of an air cooling box comprises the following steps:
step one, cooling water of a cooling system of a centrifuge is used as a medium for condensing a refrigerant of an air cooling box, as shown in fig. 1, the cooling system of the centrifuge is a closed loop consisting of a circulating water pump 1 of a cooling system of the centrifuge, a heat exchanger and the centrifuge, and is a circulating cooling system of water for removing salt and oxygen, and the pressure and the temperature are constant;
step two, calculating the diameter of the conveying pipeline, and calculating the diameter of the conveying pipeline according to the water demand of each air cooling box and the maximum economic flow rate in the pipeline, wherein the water demand of a single air cooling box is not less than 5m3H, if 9 air cooling boxes are connected with cooling water on site, the total water demand is 45m3And h, selecting the maximum economic flow rate not more than 3m/s according to a formula in a water supply and drainage design manual:
and calculating the diameter of the pipeline.
Wherein D is the diameter of the pipeline, m; upsilon-the flow velocity in the pipeline, m/s; q-pipe flow, m3/h。
The calculated pipe diameter was 0.073m, so a pipe of DN80 was selected.
Calculating the head loss of a pipeline connecting cooling water to a cooling system of the condenser of the air cooling box, and selecting a centrifuge cooling water circulating water pump 1 with the head greater than the head loss as a cooling water power source of the air cooling box;
the head loss is the on-way head loss h1And local head loss h2Summing;
a. the on-way head loss is according to the formula h1Calculated as 9.8 il.
In the formula, h1-loss of head along the way, KPa; i-hydraulic slope, searching from a water supply and drainage design manual according to the nominal diameter of the pipeline and the flow of the pipeline; l-pipe length, m.
The pipe diameters are DN80 and DN50 respectively as examples, and the calculation results are shown in the following table.
b. Local head loss according to the formula
And (4) calculating.
In the formula, h2-local head loss, KPa; xi-local loss coefficient, according to the nominal diameter of pipeline looking for from "water supply and drainage design handbook"; v-flow velocity, m/s.
The calculation results are given in the following table, taking the valve and the elbow of DN80 as an example.
To sum up, the total head loss H ═ H1+h2＝146.07KPa。
Step four, connecting a branch pipe from an outlet pipeline of a circulating water pump 1 of a cooling system of the centrifugal machine, sequentially connecting a cooling water valve 2 of a pressure supplementing machine of the cooling system of the centrifugal machine, a cooling water supply pipeline 3 of an air cooling box, a cooling water supply valve 4 of the air cooling box and a cooling water inlet end 5 of a condenser of the air cooling box, and then connecting a cooling water outlet end of the condenser of the air cooling box with one end of a cooling water outlet pipeline 6 of the condenser of the air cooling box; connecting the other end of a cooling water outlet pipeline 6 of the air cooling box condenser with a cooling water return valve 7 of a feed flow pressure compensating machine of a centrifugal machine cooling system and a free valve 8 of a cooling water return pipeline of the centrifugal machine after parallel connection;
the drift diameters of a cooling water return valve 7 of the feed flow pressure compensating machine of the centrifuge cooling system and a free valve 8 of a cooling water return pipeline of the centrifuge are smaller than the inner diameter of a cooling water outlet pipeline 6 of an air cooling box condenser, and the centrifugal cooling system and the cooling water return pipeline can be connected in parallel to split cooling water of the air cooling box condenser, so that the resistance is reduced when the cooling water enters the centrifuge cooling system and the cooling water smoothly flows in;
opening a cooling water valve 2 of a pressure supply and compensation machine of a cooling system of the centrifugal machine, a cooling water supply valve 4 of an air cooling box, a cooling water return valve 7 of a feed flow pressure compensation machine of the cooling system of the centrifugal machine and a free valve 8 of a cooling water return pipeline of the centrifugal machine, and conveying cooling water of the centrifugal machine to a condenser of the air cooling box by using a circulating water pump 1 of the cooling system of the centrifugal machine; when the water flow in the pipeline is less, only one of a cooling water return valve 7 of a feeding flow pressure compensating machine of a cooling system of the centrifugal machine and a free valve 8 of a cooling water return pipeline of the centrifugal machine is opened to return cooling water;
and step six, after the heat of the condenser of the air cooling box is taken away by the cooling water of the centrifugal machine, the cooling water returns to a feeding flow pressure supplementing machine cooling water return valve 7 of the cooling system of the centrifugal machine and a free valve 8 of a cooling water return pipeline of the centrifugal machine, enters the cooling system of the centrifugal machine, and is recycled after heat exchange.
Through the steps, cooling water of the centrifugal machine can be fully utilized, heat generated by the condenser when the air cooling box runs is taken away, a pipeline and a valve are connected to a running centrifugal machine cooling system, and continuity and stability of the running system are not affected.
Claims (8)
1. A method for carrying away heat of a condenser of an air cooling box is characterized by comprising the following steps: the method comprises the following steps:
step one, cooling water of a cooling system of a centrifuge is used as a medium for condensing a refrigerant of an air cooling box, and the cooling system of the centrifuge is formed into a closed loop by a circulating water pump (1) of a cooling system of the centrifuge, a heat exchanger and the centrifuge;
determining the diameter of a conveying pipeline according to the cooling water quantity required by the air cooling box and the maximum economic flow rate in the pipeline;
calculating the head loss of a pipeline connecting cooling water to a cooling system of the condenser of the air cooling box, and selecting a centrifuge cooling water circulating water pump (1) with the head greater than the head loss as a cooling water power source of the air cooling box;
step four, connecting a branch pipe from an outlet pipeline of a circulating water pump (1) of a centrifuge cooling system, sequentially connecting a cooling water valve (2) of a pressure supplementing machine of the centrifuge cooling system, a cooling water supply pipeline (3) of an air cooling box, a cooling water supply valve (4) of the air cooling box and a cooling water inlet end (5) of a condenser of the air cooling box, and then connecting a cooling water outlet end of the condenser of the air cooling box with one end of a cooling water outlet pipeline (6) of the condenser of the air cooling box; leading out two branch pipes from the other end of a cooling water outlet pipeline (6) of the air cooling box condenser, wherein the two branch pipes are respectively connected with a cooling water return valve (7) of a feeding flow pressure compensating machine of a centrifuge cooling system and a free valve (8) of a cooling water return pipeline of the centrifuge; the cooling water return valve (7) of the feed flow pressure compensating machine of the centrifuge cooling system is connected with the free valve (8) of the cooling water return pipeline of the centrifuge in parallel;
opening a cooling water valve (2) of a pressure supply and compensation machine of a cooling system of the centrifugal machine, a cooling water supply valve (4) of an air cooling box, a cooling water return valve (7) of a feeding flow pressure compensation machine of the cooling system of the centrifugal machine and a free valve (8) of a cooling water return pipeline of the centrifugal machine, and conveying cooling water of the centrifugal machine to a condenser of the air cooling box by using a circulating water pump (1) of the cooling system of the centrifugal machine;
and step six, the cooling water of the centrifugal machine returns to a cooling system of the centrifugal machine after taking away the heat of the condenser of the air cooling box, and is recycled after heat exchange.
2. The method of claim 1 for carrying away heat from a condenser of an air-cooled box, comprising: in the second step, through the formula:
calculating the diameter of the pipeline, wherein D is the diameter of the pipeline, and m is the diameter of the pipeline; upsilon-the flow velocity in the pipeline, m/s; q-pipe flow, m3/h。
3. The method of claim 2, further comprising the step of: in step three, the head loss h along the way1＝9.8il，h1-loss of head along the way, KPa; i-hydraulic slope, searching from a water supply and drainage design manual according to the nominal diameter of the pipeline and the flow of the pipeline; l-pipe length, m;
local head loss
h2-local head loss, KPa; xi-local loss coefficient, according to the common of the pipesThe nominal diameter is searched from a water supply and drainage design manual; v-flow velocity, m/s;
head loss H ═ H1+h2。
4. A method of carrying away heat from a condenser of an air-cooled box as claimed in claim 3, wherein: the drift diameters of a feed flow pressure supplementing machine cooling water return valve (7) and a centrifuge cooling water return pipeline free valve (8) of the centrifuge cooling system in parallel connection are smaller than the inner diameter of an air cooling tank condenser cooling water outlet pipeline (6), and the centrifuge cooling system feed flow pressure supplementing machine cooling water return valve and the centrifuge cooling water return pipeline free valve can shunt cooling return water of an air cooling tank condenser after being connected in parallel, so that resistance is reduced when the cooling water enters the centrifuge cooling system, and the cooling water smoothly flows in.
5. The method of claim 4, further comprising the step of: and step five, when the water flow in the pipeline is less, only one of a feed flow pressure compensating machine cooling water return valve (7) and a centrifuge cooling water return pipeline free valve (8) of the centrifuge cooling system is opened to return cooling water.
6. The method of claim 5, further comprising the step of: and in the sixth step, after the heat of the condenser of the air cooling box is taken away by the cooling water of the centrifugal machine, the cooling water returns to a feeding flow supplementing press cooling water return valve (7) of the cooling system of the centrifugal machine and a free valve (8) of a cooling water return pipeline of the centrifugal machine, enters the cooling system of the centrifugal machine, and is recycled after heat exchange.
7. The method of any one of claims 1 to 6, wherein the method comprises the following steps: connecting pipes and valves to the running centrifuge cooling system, the continuity and stability of the in-use system is not affected.
8. The method of claim 7, further comprising the step of: the centrifuge cooling system is a desalting and deoxidizing water circulating cooling system, and the pressure and the temperature are constant.
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| CN114251748A (en) * | 2020-09-21 | 2022-03-29 | 中核兰州铀浓缩有限公司 | Centrifugal cascade hall air conditioner heating system and method |
| CN114308419B (en) * | 2020-09-30 | 2024-01-05 | 中核兰州铀浓缩有限公司 | Double-loop single-loop operation system and method for centrifugal machine cooling system |
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