CN212720960U - Cold end optimizing device for increasing content of non-condensable gas - Google Patents
Cold end optimizing device for increasing content of non-condensable gas Download PDFInfo
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- CN212720960U CN212720960U CN202021316751.1U CN202021316751U CN212720960U CN 212720960 U CN212720960 U CN 212720960U CN 202021316751 U CN202021316751 U CN 202021316751U CN 212720960 U CN212720960 U CN 212720960U
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Abstract
The utility model discloses a cold end optimization device for increasing the content of non-condensable gas, which comprises a separator, a jet entrainment dynamic mixer, a water seal separator, a primary vacuum generator, a primary condenser, a secondary vacuum generator and a secondary condenser; the jet entrainment dynamic mixer is connected with a vacuum-pumping pipeline at the outlet of the condenser; the jet entrainment dynamic mixer is connected with the chemical water supply pipeline through an electric regulating valve of the chemical water supply pipeline; the jet flow entrainment dynamic mixer is connected with an air inlet of the first-stage vacuum generator through a separator, and a hot water outlet of the separator is connected with the water seal separator; and the primary vacuum generator and the secondary vacuum generator are both connected with a power steam pipeline through a steam pipeline electric regulating valve. The utility model discloses be adapted to thermal power unit, have characteristics such as improve unit vacuum, absorption latent heat, water conservation, economize on electricity, be favorable to improving thermal power plant thermodynamic cycle efficiency, improve unit economic nature.
Description
Technical Field
The utility model belongs to the technical field of environmental protection and energy saving, concretely relates to cold junction optimization device of increase noncondensable gas content.
Background
At present, most cold end systems of power plants in China have the problem of high energy consumption. In northern areas, the temperature difference between winter and summer and day and night is large, so that the volume flow of the gas-steam mixture to be extracted from the air-cooled condenser is large, and if the gas-steam mixture cannot be extracted in time by a vacuum-pumping system, the heat exchange effect of the air-cooled condenser can be greatly reduced. Most notably, the condenser is used as an important device of a cold end system, and people tend to underestimate the influence of vacuum deterioration caused by vacuum pumping equipment on energy consumption, and pay more attention to the influence of steam parameters on the thermal efficiency of a unit. According to statistics, in a power plant in China, the problem that 30 ten thousand of unit condensers are low in vacuum is the most serious, and the vacuum is 3% -6% lower than the design value. In addition, the greater the unit capacity, the more significant the benefit of cold end system improvements.
The commonly used evacuation equipment of power plant at present is water ring vacuum pump, and the work of water ring vacuum pump is exerted oneself very much partly and is depended on operating water temperature, receives the influence of "ultimate suction pressure" simultaneously, takes place the local air hammer phenomenon in impeller surface easily in service, and the running noise is big and make the blade produce very big tensile stress, and long-time operation easily causes the fracture of blade, threatens the safe operation of unit. The main reasons for the vacuum drop caused by the increase of the operating water temperature of the vacuum pump are: the mixed gas extracted from the condenser by the vacuum pump is composed of high-temperature steam and non-condensable gas, and the mixed gas is condensed and released in the process of entering the vacuum pump to be compressed to do work, so that the working water temperature of the vacuum pump is overhigh, and meanwhile, a large amount of overflow water is formed.
In the existing system, the temperature of working water is directly reduced, a boiled water ring vacuum pump is additionally arranged or increased, the temperature of mixed gas pumped by the vacuum pump is reduced, and an atmospheric ejector is connected in series at the inlet of the vacuum pump, so that the vacuum of the condenser can be improved, and the aim of saving energy is fulfilled. Chinese patent 201220340726.6 provides a condenser evacuation cooling device, including the condenser, its characterized in that, the connection of the vertical downward turn of the evacuation pipeline at the condenser is equipped with evacuation cooling device, evacuation cooling device be equipped with the casing, be equipped with gas steam inlet and outlet pipe mouth on the casing, be equipped with a set of spiral heat exchange tube in the casing. The air-steam mixture extracted from the air extraction pipeline of the condenser enters the vacuum cooling device through the air-steam inlet, spirally rotates on the inner wall of the tube body of the vacuum cooling device through the spiral heat exchange tube, and is in countercurrent contact with water in the water replenishing pipeline to exchange heat, so that steam in the air-steam mixture is condensed and dredged out, the condensation heat release of the steam in the water ring vacuum pump is reduced, the temperature of working water is reduced, the cavitation is prevented, and the suction capacity of the vacuum pump is improved.
Although the vacuumizing cooling device for the condenser overcomes the defects of the prior art to a certain extent, the vacuum degree of the condenser is improved, the gas-steam mixture and water in the water replenishing pipeline are not in direct contact heat exchange, partial air resistance is increased through the spiral heat exchange pipe, and the effect is not ideal.
Disclosure of Invention
An object of the utility model is to provide an increase cold junction optimization device of noncondensable gas content changes gas-steam mixture composition, improves noncondensable gas content, retrieves the vapor latent heat and the steam condensate among the evacuation pipeline, solves water ring vacuum pump overflow problem, is an energy-conserving novel cold junction optimization and synthesizes and carry effect device.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an increase cold junction optimization device of noncondensable gas content which characterized in that: the device comprises a separator, a jet flow entrainment dynamic mixer, a water seal separator, a primary vacuum generator, a primary condenser, a secondary vacuum generator and a secondary condenser; the jet entrainment dynamic mixer is connected with a vacuum-pumping pipeline at the outlet of the condenser; the jet entrainment dynamic mixer is connected with the chemical makeup water pipeline through an electric regulating valve of the chemical makeup water pipeline; the jet flow entrainment dynamic mixer is connected with an air inlet of the first-stage vacuum generator through a separator, and a hot water outlet of the separator is connected with the water seal separator; the primary vacuum generator and the secondary vacuum generator are both connected with a power steam pipeline through a steam pipeline electric regulating valve;
the primary condenser is communicated with the primary vacuum generator and the secondary vacuum generator, a large amount of steam from the primary vacuum generator is condensed, and condensed water flows into the water seal separator through a primary drain port of the primary condenser;
the secondary condenser is communicated with the secondary vacuum generator and the atmosphere and condenses part of steam from the secondary vacuum generator, the condensed water flows into a hot well at the bottom of the condenser through a secondary drain port of the secondary condenser through a multi-stage water seal, and the residual gas is discharged to the atmosphere through an exhaust port;
the water seal separator separates the mixed water from the separator and the condensed water from the first level drain port of the first level condenser again, and the condensed water is discharged through a hot well pipeline of the condenser.
The utility model discloses in, change the water supply that the water supply pipeline comes and carry out the abundant direct mixing cooling of developments with the gas-steam mixture that the condenser comes in efflux entrainment dynamic mixer, vapor constantly is condensed and reduces, makes the gas-steam mixture composition change in the evacuation pipeline to noncondensable gas content has been increased. After passing through the separator, the changed non-condensable gas enters an air inlet of the primary vacuum generator, and the heated chemical replenishing water and the water condensed from the water vapor enter the water seal separator through a hot water outlet.
The first-stage vacuum generator and the second-stage vacuum generator continuously pump out non-condensable gas from the separator under the steam injection action from the power steam pipeline to form vacuum.
The first-stage condenser is communicated with the first-stage vacuum generator and the second-stage vacuum generator, a large amount of steam from the first-stage vacuum generator is condensed, and condensed water flows into the water seal separator through the first-stage drain port.
The secondary condenser is communicated with the secondary vacuum generator and the atmosphere and condenses part of steam from the secondary vacuum generator, the condensed water flows into a hot well at the bottom of the condenser through the secondary drain port and the multi-stage water seal, and the residual gas is discharged to the atmosphere through the exhaust port.
The water seal separator separates the mixed water from the separator and the condensed water from the first level drain port of the first level condenser again, and the condensed water is discharged through a hot well pipeline of the condenser.
The chemical water replenishing pipeline electric regulating valve carries out intelligent PID automatic regulation on chemical water replenishing flow based on model prediction, and the steam pipeline electric regulating valve carries out intelligent PID automatic regulation on steam pressure based on model prediction.
The utility model discloses a partly change moisturizing (cooling water) carry out the abundant direct mixing cooling of developments with the gas-steam mixture that the condenser comes in the efflux entrainment dynamic mixer, and vapor constantly is condensed and reduces, makes the gas-steam mixture composition change in the pipeline to noncondensable gas content has been increased. After passing through the separator, the changed non-condensable gas enters vacuum pumping equipment, the temperature is raised, and the condensed water flows into a water seal separator and enters a hot well.
The utility model discloses following beneficial effect has:
1) increase of the amount of suction of non-condensable gases: after the novel cold end optimization comprehensive effect-improving device is put into operation, the temperature of mixed gas is reduced, a condensable part can be condensed in the jet entrainment dynamic mixer in advance, the volume of condensed steam is supplemented by a subsequent gas-steam mixture in a progressive mode, new dynamic balance is achieved, and therefore the pumping amount of the vacuum-pumping equipment to the non-condensable gas is increased.
2) Reducing the suction inlet pressure of the vacuum-pumping equipment: because steam is condensed, the quantity of non-condensable gas pumped out is increased inevitably under the condition that the pressure difference between the inlet pressure of the vacuumizing pipeline and the air inlet of the primary vacuum generator is not changed, and the vacuum of the condenser is improved.
3) The flow of the gas-steam mixture is facilitated: the novel cold end optimization is synthesized and is carried the gas temperature after effect device drops, can know according to the gas state equation that the volume of efflux entrainment dynamic mixer is unchangeable, and the pressure in the efflux entrainment dynamic mixer will reduce, is favorable to the steam that can not condense in the condenser and the air that leaks into to arrange to efflux entrainment dynamic mixer.
4) Recovering condensed water and latent heat: after the novel cold end optimization comprehensive effect-improving device is put into use, a large amount of water vapor of mixed gas in the vacuumizing pipeline is condensed, and latent heat in the water vapor is recovered. Similarly, high-temperature steam used as a power source in the vacuum generator is also largely condensed and recovers latent heat, and finally the high-temperature steam is converged to a hot well at the bottom of the condenser, so that multiple recovery of water resources and heat energy is realized.
5) After the novel cold end optimization comprehensive effect-improving device is put into use, the vacuum generator replaces a water ring vacuum pump to operate, the influence of phenomena such as cavitation and overflow of the vacuum pump on the pumping capacity is fundamentally eliminated, and electric energy is saved.
The utility model discloses be adapted to thermal power unit, have characteristics such as improve unit vacuum, absorption latent heat, water conservation, economize on electricity, be favorable to improving thermal power plant thermodynamic cycle efficiency, improve unit economic nature.
Drawings
Fig. 1 is a system block diagram of the present invention.
Wherein: the device comprises a condenser 1, a separator 2, a jet flow entrainment dynamic mixer 3, a first-stage vacuum generator 4, a water seal separator 5, a first-stage condenser 6, a second-stage vacuum generator 7, a second-stage condenser 8, a vacuum pipeline 9, a chemical water replenishing pipeline 10, a separator inlet 11, a noncondensable gas outlet 12, a hot water outlet 13, a condenser heat well pipeline 14, a power steam pipeline 15, a cooling water inlet 16, a cooling water outlet 17, a first-stage drain port 18, a second-stage drain port 19, a multistage water seal 20, an exhaust port 21, a chemical water replenishing pipeline electric regulating valve 22, chemical water replenishing flow 23, a steam pipeline electric regulating valve 24 and steam pressure 25.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in figure 1, the cold end optimization device for increasing the content of the non-condensable gas comprises a separator 2, a jet entrainment dynamic mixer 3, a water seal separator 5, a primary vacuum generator 4, a primary condenser 6, a secondary vacuum generator 7 and a secondary condenser 8. Wherein, the first-stage vacuum generator, the first-stage condenser, the second-stage vacuum generator and the second-stage condenser form vacuum pumping equipment. The jet flow entrainment dynamic mixer is connected with a vacuum-pumping pipeline 9 at the outlet of the condenser; the jet flow entrainment dynamic mixer is connected with the chemical makeup water pipeline 10 through an electric regulating valve 22 of the chemical makeup water pipeline; the jet flow entrainment dynamic mixer is connected with an air inlet of the first-stage vacuum generator through a separator, and a hot water outlet 13 of the separator is connected with the water seal separator; the first-stage vacuum generator and the second-stage vacuum generator are both connected with the power steam pipeline 15 through a steam pipeline electric regulating valve 24.
The chemical water supply from the chemical water supply pipeline 10 is dynamically, fully and directly mixed with the gas-steam mixture from the condenser in the jet entrainment dynamic mixer for cooling, the water steam is continuously condensed and reduced, so that the composition of the gas-steam mixture in the vacuumizing pipeline is changed, and the content of non-condensable gas is increased. After passing through the separator, the changed non-condensable gas enters an air inlet of the primary vacuum generator, and the heated chemical replenishing water and the water condensed from the water vapor enter the water seal separator through a hot water outlet 13.
Further, the primary vacuum generator and the secondary vacuum generator continuously extract the non-condensable gas from the separator under the steam injection action from the power steam pipeline 15 to form vacuum.
Further, the primary condenser is communicated with the primary vacuum generator and the secondary vacuum generator, a large amount of steam from the primary vacuum generator is condensed, and condensed water flows into the water seal separator through the primary drain port 18.
Furthermore, the secondary condenser is communicated with the secondary vacuum generator and the atmosphere, partial steam from the secondary vacuum generator is condensed, condensed water flows into a hot well at the bottom of the condenser from the secondary drain port 19 through a multi-stage water seal 20, and residual gas is discharged to the atmosphere through an exhaust port 21.
Further, the water seal separator separates the mixed water from the separator and the condensed water from the first drain port of the first-stage condenser again, and the separated water is discharged through the condenser-removing hot well pipeline 14.
Furthermore, the chemical water replenishing pipeline electric regulating valve carries out intelligent PID automatic regulation on chemical water replenishing flow based on model prediction, and the steam pipeline electric regulating valve carries out intelligent PID automatic regulation on steam pressure based on model prediction.
To sum up, the utility model provides a cold junction optimization device based on zero-power consumption cooling technology increases noncondensable gas content to the generating efficiency who improves generating set, aspects such as energy saving and emission reduction all play very important effect, have huge social.
The above, only be the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, and according to the technical solution of the present invention and the utility model concept (for example, changing the water supply into a new cold water source, the condensed water does not enter into the hot well), equivalent replacement or change should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides an increase cold junction optimization device of noncondensable gas content which characterized in that: the device comprises a separator (2), a jet flow entrainment dynamic mixer (3), a water seal separator (5), a primary vacuum generator (4), a primary condenser (6), a secondary vacuum generator (7) and a secondary condenser (8); the jet flow entrainment dynamic mixer (3) is connected with a vacuum-pumping pipeline (9) at the outlet of the condenser (1); the jet flow entrainment dynamic mixer (3) is connected with the chemical makeup water pipeline (10) through an electric regulating valve (22) of the chemical makeup water pipeline; the jet flow entrainment dynamic mixer (3) is connected with an air inlet of the first-stage vacuum generator (4) through the separator (2), and a hot water outlet (13) of the separator (2) is connected with the water seal separator (5); the primary vacuum generator (4) and the secondary vacuum generator (7) are both connected with a power steam pipeline (15) through a steam pipeline electric regulating valve (24);
the primary condenser (6) is communicated with the primary vacuum generator (4) and the secondary vacuum generator (7), a large amount of steam from the primary vacuum generator (4) is condensed, and condensed water flows into the water seal separator (5) through a primary drain port (18) of the primary condenser (6);
the secondary condenser (8) is communicated with the secondary vacuum generator (7) and the atmosphere and condenses part of steam from the secondary vacuum generator (7), the condensed water flows into a hot well at the bottom of the condenser (1) through a secondary drainage port (19) of the secondary condenser (8) through a multi-stage water seal (20), and the residual gas is discharged to the atmosphere through an exhaust port (21);
the water seal separator (5) separates the mixed water from the separator (2) and the condensed water from the first-stage drain opening (18) of the first-stage condenser (6) again, and the separated water is discharged through a condenser-removing hot well pipeline (14).
2. The cold end optimization device for increasing non-condensable gas content according to claim 1, wherein: the jet entrainment dynamic mixer (3) and the separator (2) are directly connected into the vacuum-pumping pipeline (9) in series.
3. The cold end optimization device for increasing non-condensable gas content according to claim 1, wherein: the separator (2) and the first-stage condenser (6) are connected with a hot well at the bottom of the condenser (1) through a water seal separator (5), and the second-stage condenser (8) is connected with the hot well at the bottom of the condenser (1) through a multi-stage water seal (20).
4. The cold end optimization device for increasing non-condensable gas content according to claim 1, wherein: the chemical water replenishing pipeline electric regulating valve (22), the chemical water replenishing flow (23), the steam pipeline electric regulating valve (24) and the steam pressure (25) are all electrically connected with the automatic control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021316751.1U CN212720960U (en) | 2020-07-08 | 2020-07-08 | Cold end optimizing device for increasing content of non-condensable gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021316751.1U CN212720960U (en) | 2020-07-08 | 2020-07-08 | Cold end optimizing device for increasing content of non-condensable gas |
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| CN212720960U true CN212720960U (en) | 2021-03-16 |
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