CN110057205B - Open water and circulating water combined cooling water system - Google Patents
Open water and circulating water combined cooling water system Download PDFInfo
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- CN110057205B CN110057205B CN201810047763.XA CN201810047763A CN110057205B CN 110057205 B CN110057205 B CN 110057205B CN 201810047763 A CN201810047763 A CN 201810047763A CN 110057205 B CN110057205 B CN 110057205B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 495
- 239000000498 cooling water Substances 0.000 title claims abstract description 26
- 238000004140 cleaning Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 abstract description 21
- 230000008901 benefit Effects 0.000 abstract description 11
- 238000010977 unit operation Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 230000009977 dual effect Effects 0.000 description 6
- 238000009835 boiling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to an open water and circulating water combined cooling water system, which comprises an open water system and a circulating water system and is characterized in that the circulating water system comprises a front flow device and a rear flow device, and an outlet of the open water system is connected between the front flow device and the rear flow device, so that the open water in the circulating water system and the circulating water output by the front flow device and the rear flow device of a condenser are combined and then flow through the rear flow device of the condenser. The invention has the beneficial effects that the open water with the temperature of 3-5 ℃ after the open water heat exchanger is connected into the rear water chamber or the rear water chamber connecting pipe of the condenser, so that the open water continuously flows through the rear half-path condenser, the temperature is continuously increased by 4-5 ℃, the cooling capacity of the open water is fully utilized, and the economic benefit of unit operation is improved.
Description
Technical Field
The invention relates to an open water and circulating water combined cooling water system.
Background
The thermodynamic cycle of a common condensing power plant is a Rankine cycle, wherein water is heated to become steam, the steam enters a steam turbine to perform work and generate power, the exhaust steam is required to be cooled into condensed water through a condenser, the condensed water is pressurized to form water, and the cycle is repeated. And the cooling water is used for cooling the exhaust steam of the steam turbine into condensed water, and is short for circulating water. The low-temperature circulating water enters the condenser to absorb heat of steam exhausted by the steam turbine, the temperature of the water rises, the temperature rise is usually 8-10 ℃, and then the water leaves the condenser to exhaust the heat to the external environment.
The circulating water quantity of the 60-kilowatt unit is about 6-9 kilowatts/h, and the circulating water quantity of the 100-kilowatt unit is about 6-9 kilowatts/h.
Many devices are also in the condensing power plant, which generates heat during normal operation, and the heat needs to be dissipated to maintain normal operation. And the cooling water is used for transferring heat such as equipment operation heat dissipation to the external environment, and is called open water for short. The low-temperature open water enters the open water heat exchanger, absorbs heat such as heat dissipation and the like of equipment operation, increases water temperature to 3-5 ℃ generally, and then leaves the open water heat exchanger to discharge the heat to the external environment.
The open water volume of the 60-kilowatt unit is about 3000t/h, and the open water volume of the 100-kilowatt unit is about 4500t/h.
Typically open water is the same source and destination as the circulating water. From the above data, it can be seen that the temperature rise of the circulating water is 8 to 10 ℃, the temperature rise of the open water is 3 to 5 ℃, the open water temperature rise is only about 50% of the circulating water, and the open water cooling capacity is discharged without full use.
Typical system diagrams of conventional open water and circulating water are shown in fig. 1 and fig. 2.
FIG. 1 is a schematic diagram of an open water and circulating water system of a single back pressure condenser. Usually, each condensing generator is assembled with two condensers, circulating water of the two condensers with single back pressure is in parallel connection, and the back pressures of the two condensers are the same.
FIG. 2 is a schematic diagram of an exemplary system of open water and circulating water for a dual back pressure condenser. The circulating water of the two condensers with double back pressures is in series connection, and the back pressures of the two condensers are low and high.
According to the open water and circulating water combined cooling water system, the open water with the temperature rising of 3-5 ℃ after the open water heat exchanger is connected into the rear water chamber or the rear water chamber connecting pipe of the condenser, so that the open water continuously flows through the rear half-path condenser, the temperature is continuously increased by 4-5 ℃, the cooling capacity of the open water is fully utilized, the thermodynamic cycle efficiency is improved, and the energy-saving effect is achieved.
Meanwhile, the open water system can share the filter, the cleaning device, the valve, the pipeline and the like of the circulating water system, so that the investment is reduced, and the economic benefit is improved.
The technology of the existing open water and circulating water system which is commonly adopted is shown in the accompanying drawings 1 and 2.
The common characteristics of the figure 1 and the figure 2 are that the open water and the circulating water are respectively led from the main pipe and respectively discharged to the main pipe. The open water passes through an open water heat exchanger, and the temperature rise is 3-5 ℃; the circulating water passes through a condenser, and the temperature rise is 8-10 ℃. The open water temperature rise is only about 50% of the circulating water, and the open water cooling capacity is discharged without being fully utilized.
FIG. 1 is a schematic diagram of an open water and circulating water system of a single back pressure condenser. Usually, each condensing generator is provided with two condensers, the circulating water of the two condensers with single back pressure is in parallel connection, the circulating water at each side respectively flows through the left side and the right side of each condenser, and the circulating water temperatures and the back pressures of the two condensers are the same.
FIG. 2 is a schematic diagram of an exemplary system of open water and circulating water for a dual back pressure condenser. The circulating water of the two condensers with double back pressures is in series connection, and the circulating water at each side flows through the two sides of one condenser and then flows through the two sides of the other condenser, so that the circulating water temperature of the two condensers is one low and one high, and the back pressure is one low and one high.
In fig. 1 and 2, the circulating water system is provided with corresponding inlet and outlet isolation valves, filters and cleaning devices, and the open water system is additionally provided with corresponding inlet and outlet isolation valves, filters and cleaning devices, so that the investment is the sum of the two systems.
In the existing condensing power generation technology, open water and circulating water are usually respectively led from a water inlet main pipe and respectively discharged to a water outlet main pipe. The open water passes through an open water heat exchanger, and the temperature rise is 3-5 ℃; the circulating water passes through a condenser, and the temperature rise is 8-10 ℃. The open water temperature rise is only about 50% of the circulating water temperature rise, and the open water cooling capacity is discharged without being fully utilized.
In addition, the circulating water system and the open water system are respectively provided with an inlet and outlet isolation valve, a filter and a cleaning device of the respective systems, and the investment is the sum of the two systems and is relatively high.
Disclosure of Invention
The invention aims to make up the defects of the prior art and provides an open water and circulating water combined cooling water system which can provide cooling capacity, improve thermodynamic cycle efficiency, achieve energy-saving effect and improve economic benefit.
In order to achieve the above purpose, the system for combining open water and circulating water comprises an open water system and a circulating water system, and is characterized in that the circulating water system comprises a front flow device and a rear flow device, and an outlet of the open water system is connected between the front flow device and the rear flow device, so that the open water in the circulating water system and the circulating water output by the front flow device and the rear flow device of a condenser flow through the rear flow device of the condenser after being combined.
The open water system and the circulating water combined cooling water system are distributed in the mode, so that the drainage of the open water system is led to the middle position of the circulating water of the condenser, the open water and the circulating water are converged and then continuously pass through the second half of the condenser, and the cooling capacity of the open water is fully utilized.
The open water and the circulating water are respectively led from the water inlet header pipe, the circulating water is converged with the water flow of the open water leaving the open water system after entering the front flow tube bundle and flows into the rear flow tube bundle, and finally the circulating water and the water flow are discharged to the water discharge header pipe together.
In one embodiment, the circulating water system includes a condenser comprising at least a front flow tube bundle and a back flow tube bundle, and an outlet of the open water system is connected between the front flow tube bundle and the back flow tube bundle.
In the invention, the circulating water system at least comprises two flow tube bundles, wherein the front flow tube bundle is connected with the water inlet pipeline, and the rear flow tube bundle is connected with the water outlet pipeline. And no redundant flow tube bundles exist between the front flow tube bundle and the rear flow tube bundle, so that the condenser is double-flow, and a plurality of flow tube bundles can be arranged, so that the circulating water system is multi-flow. It should be understood that circulating water systems, whether dual-pass or multi-pass, are within the scope of the present invention.
Preferably, the circulating water system comprises a plurality of condensers which are connected in parallel, each condenser at least comprises a flow tube bundle and a back flow tube bundle, and an outlet of the open water system is connected between the front flow tube bundle and the back flow tube bundle of each condenser.
Preferably, two condensers are connected in parallel.
Preferably, each condenser comprises a rear water chamber, an outlet of the front flow tube bundle is connected with the rear water chamber, an inlet of the rear flow tube bundle is connected with the rear water chamber, and an outlet of the open water system is connected into the rear water chamber.
Or each condenser comprises a rear water chamber, an outlet of the front flow tube bundle is connected with the rear water chamber, an inlet of the rear flow tube bundle is connected with the rear water chamber, and an outlet of the open water system is connected into a rear water chamber connecting pipe.
In an embodiment, the circulating water system includes two condensers connected in series, the condenser connected with the water inlet is a front flow device, and the condenser B connected with the water outlet is a rear flow device.
The circulating water system comprises a plurality of condensers, wherein a front flow device is connected with the water inlet, a rear flow device is connected with the water outlet, and the rest condensers are connected between the two condensers in series.
Preferably, each condenser has a rear water chamber and a front water chamber, the rear water chamber of the preceding condenser being identical to the front water chamber of the following condenser to form a series connection.
The sequence of the present invention can be understood as the first one near the water inlet and the second one far from the water inlet.
Preferably, the outlet of the open water system is connected to the rear water chamber of the preceding condenser.
Or preferably, the outlet of the open water system is connected into the rear water chamber connecting pipe.
In one embodiment, a filter is provided on the water intake conduit of the open water system.
In one embodiment, a cleaning device is arranged on the water outlet pipeline of the condenser.
Preferably, the open water system and the circulating water system share a filter, the filter is arranged on a water inlet pipeline of the open water system, the open water system and the circulating water system share a cleaning device, and the filter is arranged on a water outlet pipeline of the condenser.
The inlet water of the open water heat exchanger can be led from the isolating valve of the circulating water inlet pipe, and can correspondingly share the isolating valve, the filter, the cleaning device and other devices of the circulating water system, thereby reducing engineering investment.
The open water system comprises an open water heat exchanger, and the open water heat exchanger and the condenser are integrally arranged.
The open water heat exchanger and the condenser can be made into a combined type, so that the length of an open water pipeline is reduced, the occupied area of the open water heat exchanger and the open water pipeline is reduced, the occupied area of a factory building is correspondingly reduced, and the engineering investment is reduced.
The method for cooling water by combining open water and circulating water comprises an open water system and a circulating water system, and is characterized in that the water discharged by the open water system is led to the middle position of the circulating water system, and the water discharged by the open water system and the circulating water are combined and then continuously pass through the second half of a condenser.
In one embodiment, the circulating water flows through the pre-process device of the circulating water system from the water inlet pipe, the temperature rise is about 3-5 ℃, the open water flows through the open water heat exchanger from the water inlet pipe, the temperature rise is about 3-5 ℃, and then the open water and the circulating water flowing out after the pre-process device are neutralized, and flow through the post-process device together, and the temperature rise is about 4-5 ℃.
The beneficial effects of the invention are as follows: according to the invention, the open water with the temperature of 3-5 ℃ after the open water heat exchanger is connected to the rear water chamber or the rear water chamber connecting pipe of the condenser, so that the open water continuously flows through the rear half-path condenser, the temperature is continuously increased by 4-5 ℃, the cooling capacity of the open water is fully utilized, the thermodynamic cycle efficiency is improved, and the energy-saving effect is achieved.
Meanwhile, the open water system can share the filter, the cleaning device, the valve, the pipeline and the like of the circulating water system, so that the investment is reduced, and the economic benefit is improved.
It is understood that within the scope of the present invention, the above-described technical features of the present invention and technical features specifically described below (in the embodiment mode) may be combined with each other to constitute new or preferred technical solutions. And are limited to a space, and are not described in detail herein.
Drawings
FIG. 1 is a diagram of a water-on-cycle and circulating water system of a prior art single back pressure condenser;
FIG. 2 is a diagram of a boiled water and circulating water system of a prior art dual back pressure condenser;
FIG. 3 is a diagram of a single back pressure circulating water and boiling water system according to a first embodiment of the present invention;
FIG. 4 is a diagram of a single back pressure circulating water and boiling water system according to a second embodiment of the present invention;
FIG. 5 is a diagram of a dual back pressure circulating water and boiling water system according to a third embodiment of the present invention;
FIG. 6 is a diagram of a dual back pressure circulating water and boiling water system according to a fourth embodiment of the present invention;
Wherein the method comprises the steps of
1-Open water system
11-Open water heat exchanger A12-open water heat exchanger B
2-Circulating water system
21-Condenser A22-condenser B
3-Filter
4-Cleaning device
5-Isolation valve
Detailed Description
In the existing condensing power generation technology, open water and circulating water are usually respectively led from a water inlet main pipe and respectively discharged to a water outlet main pipe. The open water passes through an open water heat exchanger, and the temperature rise is 3-5 ℃; the circulating water passes through a condenser, and the temperature rise is 8-10 ℃. The open water temperature rise is only about 50% of the circulating water temperature rise, and the open water cooling capacity is discharged without being fully utilized. In addition, the circulating water system and the open water system are respectively provided with an inlet and outlet isolation valve, a filter and a cleaning device of the respective systems, and the investment is the sum of the two systems and is relatively high.
The open water and circulating water combined cooling water system changes the water inflow loop of the traditional open water and circulating water respectively, and the heated open water and circulating water are combined to heat the latter half of the open water, so that the open water cooling capacity can be fully utilized and discharged.
Term interpretation:
As used herein, the terms "preferred," "optimal," "typical," "exemplary," or "optionally" do not limit the scope of the invention or its embodiments.
As used herein, the term "may" means including or excluding and/or using or not using and/or implementing or not implementing and/or selecting or effecting or not effecting, which forms at least a part of some embodiments of the present invention or its consequences, without limiting the scope of the present invention.
When a range of values is recited, it is intended to be convenient or concise, as well as to include all possible ranges and individual values within or around the boundaries of the range. Any numerical value, unless otherwise stated, also includes actual approximation, and integer values do not exclude fractional values. The sub-range values and actual approximations should not be considered to be the specifically disclosed values.
Reference to the singular does not exclude the plural reference unless the context indicates otherwise.
Terminology:
circulating cooling water: in a condensing power plant, cooling water, namely circulating water, is used for cooling exhaust steam of a steam turbine into condensed water.
Open cooling water: in a condensing power plant, cooling water, namely open water, is used for transferring heat such as equipment operation heat dissipation to an external environment.
In the existing condensing power generation technology, open water and circulating water are usually respectively led from a water inlet main pipe and respectively discharged to a water outlet main pipe. The open water passes through an open water heat exchanger, and the temperature rise is 3-5 ℃; the circulating water passes through a condenser, and the temperature rise is 8-10 ℃. The open water temperature rise is only about 50% of the circulating water temperature rise, and the open water cooling capacity is discharged without being fully utilized. In addition, the circulating water system and the open water system are respectively provided with an inlet and outlet isolation valve, a filter and a cleaning device of the respective systems, and the investment is the sum of the two systems and is relatively high.
The patent discloses a novel open water and circulating water combined cooling water system technology. According to the invention, the open water with the temperature of 3-5 ℃ after the open water heat exchanger is connected to the rear water chamber or the rear water chamber connecting pipe of the condenser, so that the open water continuously flows through the rear half-path condenser, the temperature is continuously increased by 4-5 ℃, the cooling capacity of the open water is fully utilized, the thermodynamic cycle efficiency is improved, and the energy-saving effect is achieved. Meanwhile, the open water system can share the filter, the cleaning device, the valve, the pipeline and the like of the circulating water system, so that the investment is reduced, and the economic benefit is improved.
The main advantages of the invention
(1) The drainage of the open water system is led to the middle position of the circulating water of the condenser, such as a rear water chamber or a rear water chamber connecting pipe of the condenser, so that the open water and the circulating water are combined and then continuously pass through the rear half flow of the condenser, and the cooling capacity of the open water is fully utilized;
(2) The novel open water and circulating water combined cooling water system is suitable for a single-back pressure condensing generator set and is also suitable for a multi-back pressure condensing generator set (double-back pressure, three-back pressure and the like);
(3) After the inlet water of the open water heat exchanger can be led from the isolating valve of the circulating water inlet pipe, the isolating valve, the filter, the cleaning device and other devices of the circulating water system can be correspondingly shared, so that the engineering investment is reduced;
(4) The open water heat exchanger and the condenser can be made into a combined type, so that the length of an open water pipeline is reduced, the occupied area of the open water heat exchanger and the open water pipeline is reduced, the occupied area of a factory building is correspondingly reduced, and the engineering investment is reduced.
In the existing condensing power generation technology, open water and circulating water are respectively led from a main pipe and respectively discharged to the main pipe. The open water passes through an open water heat exchanger, and the temperature rise is 3-5 ℃; the circulating water passes through a condenser, and the temperature rise is 8-10 ℃. The open water temperature rise is only about 50% of the circulating water, and the open water cooling capacity is discharged without being fully utilized.
In addition, the circulating water system and the open water system are respectively provided with an inlet and outlet isolation valve, a filter and a cleaning device of the respective systems, and the investment is the sum of the two systems and is relatively high.
Therefore, the patent discloses a novel open water and circulating water combined cooling water system technology. According to the invention, the open water with the temperature of 3-5 ℃ after the open water heat exchanger is connected to the rear water chamber or the rear water chamber connecting pipe of the condenser, so that the open water continuously flows through the rear half-path condenser, the temperature is continuously increased by 4-5 ℃, the cooling capacity of the open water is fully utilized, and the economic benefit of unit operation is improved. The expected income can be increased by 60 kilowatts per year for each 60 kilowatt condensing generator set, and 100 kilowatts per year for each 100 kilowatt condensing generator set.
Meanwhile, the open water system can share the filter, the cleaning device, the valve, the pipeline and the like of the circulating water system, so that the investment is reduced, and the economic benefit is improved. The investment of each 60-kilowatt condensing generator set can be reduced by about 300 kiloyuan; the investment for each 100-kilowatt condensing generator set can be reduced by about 500 kiloyuan. In addition, the open water heat exchanger and the condenser can be made into a combined type, so that the length of an open water pipeline is further reduced, the occupied area of the open water heat exchanger and the open water pipeline is reduced, the occupied area of a factory building is correspondingly reduced, and the investment of millions of engineering is further reduced.
The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings, so that the objects, features and advantages of the present invention will be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but rather are merely illustrative of the true spirit of the invention.
The invention relates to a system for combining open water and circulating water to cool water, which comprises an open water system 1 and a circulating water system 2. The circulating water system 2 comprises a condenser, a pipeline, an isolating valve, a filter, a cleaning device and the like; the open water system 1 comprises open water heat exchanger pipes, isolation valves, filters, cleaning devices, etc. The novel open water and circulating water combined cooling water system can be suitable for single back pressure or multiple back pressures (double back pressure, three back pressures and the like), and can be divided into different systems shown in figures 3-6 according to different condenser back pressures and different pipeline connection methods.
Example 1
Figure 3 shows a single back pressure cycle water and open water system flow. The open water system 1 comprises an open water heat exchanger A and an open water heat exchanger B which are connected in parallel, and a water inlet pipeline is connected with inlets of the open water heat exchanger A and the open water heat exchanger B. The circulating water system 2 comprises a condenser A and a condenser B which are connected in parallel. The inlets of the condenser A and the condenser B are respectively connected into a water inlet pipeline, and the water outlet pipelines of the open water heat exchanger A and the open water heat exchanger B are connected with the connected water chambers of the two condensers in a split mode, so that the open water and the circulating water are converged and led out to a water drainage main pipe through the latter half process.
The double-flow condenser refers to a condenser comprising a front flow tube bundle and a rear flow tube bundle. Wherein, the front flow tube bundle is connected with the water inlet pipeline, and the rear flow tube bundle is connected with the water outlet pipeline. The outlet of the open water system is connected between the front flow tube bundle and the back flow tube bundle. In this embodiment, the pre-flow device and the post-flow device are assumed by a pre-flow tube bundle and a post-flow tube bundle with a condenser.
The method comprises the following steps: circulating water flows through one side (namely a front flow tube bundle) of the two condensers respectively from the water inlet header pipe, the temperature rise is about 4-5 ℃, and then the circulating water enters the connected water chamber of the condensers; the open water enters two open water heat exchangers from the main pipe respectively, the temperature rise is about 3-5 ℃, then the open water is led to the connected water chamber of the condenser, and is combined with the circulating water, flows through the other side (namely the post-flow tube bundle) of the two condensers together, the temperature rise is about 4-5 ℃, and then is discharged to the drainage main pipe.
Compared with the conventional scheme, the total temperature rise of the open water in the figure 3 is improved by 4-5 ℃, the cooling capacity is utilized more, and the economic benefit of unit operation is improved. It is expected that 60 kilowatts of revenue may be increased per year for each 60 kilowatt unit and 100 kilowatts may be increased per year for each 100 kilowatt unit.
In the present embodiment, the filter 3, the washing device 4, and the isolation valve 5 are provided in the open water system and the circulating water system, respectively.
Example 2
Fig. 4 shows a second single back pressure open water and circulating water system flow, and example 2 is similar to example 1, except that after the inlet water of the open water heat exchanger of fig. 4 is led from the circulating water inlet pipe isolation valve, the filter, the cleaning device and other devices of the circulating water system can be shared correspondingly, so as to reduce engineering investment.
In the single back pressure combined cooling system in open water and circulating water in fig. 4, two open water heat exchangers A, B of the open water system and two condensers A, B of the circulating water system are respectively combined to form two parallel systems, each system comprises an open water heat exchanger and a condenser, taking group a as an example, a water inlet pipe is connected with an isolation valve and then is connected with a filter 3, the water inlet pipe is respectively connected with an open water heat exchanger A11 and a condenser A21, a water outlet of the open water heat exchanger A11 is connected with a rear water chamber of the condenser A21 and then flows into the rear half of the condenser A21 after being combined, and an outlet of the condenser A21 is connected with a cleaning device 4 and the isolation valve 5 in series and is connected to a drainage pipeline. The connection mode of the group B and the group A is the same. Wherein the open water heat exchanger A11 and the condenser A21 are integrally arranged.
The investment of each 60-kilowatt condensing generator set can be reduced by about 300 kiloyuan; the investment for each 100-kilowatt condensing generator set can be reduced by about 500 kiloyuan. In addition, the open water heat exchanger in fig. 4 can be integrated with the condenser, so that the length of the open water pipeline is further reduced, the occupied area of the open water heat exchanger and the open water pipeline is reduced, the occupied area of a factory building is correspondingly reduced, and the engineering investment is further reduced.
Example 3
Figure 5 shows a double back pressure circulating water and open water system flow. The open water system 1 in this embodiment includes an open water heat exchanger a 11 and an open water heat exchanger B12 connected in parallel. And the water inlet pipeline is connected with inlets of the open water heat exchanger A and the open water heat exchanger B. The circulating water system 2 includes a condenser a21 and a condenser B22 connected in series. For purposes of the present application, a condenser system may be understood as a double housing, double back pressure (single back pressure for every other housing), single pass (single pass for every other housing). Circulating water enters A, B condensers in series respectively, enters from a low back pressure condenser A, and the effluent enters a high back pressure condenser B and is discharged, and high and low steam chambers are formed due to different circulating water inlet temperatures. The water side is double-in and double-out. The inlet of the condenser A21 is connected with a water inlet pipeline, the outlet of the condenser B22 is connected with a drainage pipeline, and the water outlet pipelines of the open water heat exchanger A and the open water heat exchanger B are connected with the connecting pipelines of the two condensers in a split mode, so that open water and circulating water are converged and led out to a drainage main pipe through the latter half process.
The condenser A connected with the water inlet is a front flow device, and the condenser B connected with the water outlet is a rear flow device. Each condenser is provided with a rear water chamber and a front water chamber, and the rear water chamber of the previous condenser is identical with the front water chamber of the subsequent condenser to form a series connection. The sequence of the present invention can be understood as the first one near the water inlet and the second one far from the water inlet. The outlet of the open water system is connected with the rear water chamber connecting pipe.
The method comprises the following steps: circulating water firstly flows through the left side and the right side of a condenser from a water inlet main pipe, the temperature rise is about 4-5 ℃, and then the circulating water enters a rear water chamber connecting pipe of the condenser; the open water enters two open water heat exchangers from the main pipe respectively, the temperature rise is about 3-5 ℃, then the open water is led to a rear water chamber connecting pipe of the condenser, and is combined with circulating water, flows through the left side and the right side of the other condenser together, the temperature rise is about 4-5 ℃, and then is discharged to the drainage main pipe.
Compared with the conventional scheme, the total temperature rise of the open water in the figure 5 is improved by 4-5 ℃, the cooling capacity is utilized more, and the economic benefit of unit operation is improved. The expected income can be increased by 60 kilowatts per year for each 60 kilowatt condensing generator set, and 100 kilowatts per year for each 100 kilowatt condensing generator set.
In the present embodiment, the filter 3, the washing device 4 and the isolation valve 5 are respectively connected in an open water system and a circulating water system.
Example 4
Figure 6 shows a second double back pressure cycle water and open water system flow. Embodiment 4 is similar to fig. 3, except that the inlet water of the open water heat exchanger of fig. 6 is led from the isolation valve of the circulating water inlet pipe, and the isolation valve, the filter, the cleaning device and other devices of the circulating water system can be shared correspondingly, so that the engineering investment is reduced. The investment of each 60-kilowatt condensing generator set can be reduced by about 300 kiloyuan; the investment for each 100-kilowatt condensing generator set can be reduced by about 500 kiloyuan. In addition, the open water heat exchanger in fig. 6 can be integrated with the condenser, so that the length of the open water pipeline is further reduced, the occupied area of the open water heat exchanger and the open water pipeline is reduced, the occupied area of a factory building is correspondingly reduced, and the millions of engineering investment is further reduced.
In the dual back pressure combined open water and circulating water cooling system of fig. 6, two condensers A, B are connected in series, wherein two open water heat exchangers A, B of the open water system are integrated on one condenser or on two condensers respectively. In this embodiment, two open water heat exchangers A, B are integrated on the condenser a, specifically, the water inlet pipe is connected to two isolation valves 5 and the filter 3 in a split manner, and each pipeline is connected to one cavity of the condenser a21 and one open water heat exchanger in a split manner. For example, one pipe is connected to the left side of the condenser 21 and the open water heat exchanger a, and merges at an outlet, for example, merges in a connecting pipe, is connected to the right side of the condenser B22 and is connected to a drain pipe after the cleaner 4 and the isolation valve 5 are connected in series at the outlet. One pipe is connected to the right side of the condenser 21 and the open water heat exchanger B and merges at the outlet, for example, in a connecting pipe, is connected to the left side of the condenser B22 and is connected to a drain pipe after the outlet is connected in series with the cleaner 4 and the isolation valve 5.
While the preferred embodiments of the present application have been described in detail, it will be appreciated that those skilled in the art, upon reading the above teachings, may make various changes and modifications to the application, and equivalents thereof will fall within the scope of the application as defined in the appended claims.
Claims (7)
1. The utility model provides an open water and circulating water in-and-out cooling water system, its characterized in that includes open water system and circulating water system, its characterized in that, the circulating water system includes preceding flow device and back flow device, open water system include two parallelly connected open water heat exchangers, the inlet channel with open water heat exchanger's entry linkage, the circulating water system includes two condensers of establishing ties, two condensers are low backpressure condenser and high backpressure condenser respectively, circulating water is serial follow low backpressure condenser gets into, and the water outlet gets into after the Gao Beiya condenser discharges and forms high, low steam chamber, low backpressure condenser's entry linkage inlet channel, gao Beiya condenser's exit linkage pipeline, two open water heat exchanger's outlet pipe reposition of redundant personnel connects two condenser's connecting tube, open water system's export access before flow device with between the back flow device for open water in the circulating water system and the circulating water that the device output behind the condenser after the flow device is the confluence device is the condenser, the flow is the water outlet device is continuous with the water outlet, the flow device is the condenser is continuous with the water outlet.
2. The combined open water and circulating water cooling water system according to claim 1, wherein the circulating water system comprises a condenser comprising at least a front flow tube bundle and a back flow tube bundle, and an outlet of the open water system is connected between the front flow tube bundle and the back flow tube bundle.
3. The open water and circulating water combined cooling water system according to claim 2, wherein each condenser comprises a rear water chamber, the outlet of the front flow tube bundle is connected with the rear water chamber, the inlet of the rear flow tube bundle is connected with the rear water chamber, and the outlet of the open water system is connected into the rear water chamber.
4. The open water and circulating water combined cooling water system according to claim 2, wherein each condenser comprises a rear water chamber, the outlet of the front flow tube bundle is connected with the rear water chamber, the inlet of the rear flow tube bundle is connected with the rear water chamber, and the outlet of the open water system is connected into the rear water chamber connecting pipe.
5. The combined cooling water system of any one of claims 1 to 4, wherein the open water system and the circulating water system share a filter, the filter is arranged on a water inlet pipe of the open water system, the open water system and the circulating water system share a cleaning device, and the filter is arranged on a water outlet pipe of the condenser.
6. The combined open water and circulating water cooling water system according to any one of claims 1 to 4, wherein the open water system comprises an open water heat exchanger, and the open water heat exchanger and the condenser are integrally arranged.
7. A method for combining open water and circulating water, which is characterized in that the open water and circulating water combined cooling water system is adopted, and comprises an open water system and a circulating water system; the outlet of the open water system is connected between the front flow device and the rear flow device, so that the open water in the circulating water system and the circulating water output by the front flow device of the condenser flow through the rear flow device of the condenser after being converged, wherein the condenser connected with the water inlet is the front flow device, and the condenser connected with the water outlet is the rear flow device.
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| CN201810047763.XA CN110057205B (en) | 2018-01-18 | 2018-01-18 | Open water and circulating water combined cooling water system |
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| CN201810047763.XA CN110057205B (en) | 2018-01-18 | 2018-01-18 | Open water and circulating water combined cooling water system |
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| CN110057205A CN110057205A (en) | 2019-07-26 |
| CN110057205B true CN110057205B (en) | 2024-05-28 |
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| US6769258B2 (en) * | 1999-08-06 | 2004-08-03 | Tom L. Pierson | System for staged chilling of inlet air for gas turbines |
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| CN102644581A (en) * | 2012-03-26 | 2012-08-22 | 杭州意能电力技术有限公司 | Subsystem debugging method for un-commissioned circulating water system of firepower generator set |
| CN203704692U (en) * | 2013-09-24 | 2014-07-09 | 上海埃易能源科技有限公司 | Waste heat recovery type double-flow-path power station condenser |
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