CN221565850U - Power plant waste heat steam utilization evaporator - Google Patents
Power plant waste heat steam utilization evaporator Download PDFInfo
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- CN221565850U CN221565850U CN202323119615.XU CN202323119615U CN221565850U CN 221565850 U CN221565850 U CN 221565850U CN 202323119615 U CN202323119615 U CN 202323119615U CN 221565850 U CN221565850 U CN 221565850U
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- 239000010908 plant waste Substances 0.000 title claims abstract description 27
- 238000000926 separation method Methods 0.000 claims abstract description 111
- 239000000463 material Substances 0.000 claims abstract description 94
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000002918 waste heat Substances 0.000 claims abstract description 29
- 239000002351 wastewater Substances 0.000 claims abstract description 17
- 239000012452 mother liquor Substances 0.000 claims abstract description 16
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 15
- 230000023556 desulfurization Effects 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 6
- 238000009833 condensation Methods 0.000 claims description 23
- 230000005494 condensation Effects 0.000 claims description 23
- 238000002425 crystallisation Methods 0.000 claims description 14
- 230000008025 crystallization Effects 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000007701 flash-distillation Methods 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 description 14
- 230000008020 evaporation Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000010612 desalination reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model discloses a power plant waste heat steam utilization evaporator, which comprises: a feed pump; the preheating unit is provided with a preheating material inlet, a preheating material outlet, a preheating non-condensable gas outlet, a preheating condensate water inlet, a preheating condensate water outlet and a preheating secondary steam inlet; the heater is provided with a heating material inlet, a heating material outlet, a waste heat steam inlet, a heating non-condensable gas outlet and a heating condensate water outlet; a vacuum pump; a condensing tank; separating a unit; and a solid-liquid separation assembly. This power plant waste heat steam utilizes evaporimeter adopts power plant waste heat steam as the heat source, heats the material through preheating unit and heater for concentration constantly risees after the material is through the flash distillation, and rethread solid-liquid separation subassembly separates mother liquor and solid, and not only make full use of battery waste heat steam heat reduces the energy consumption, but also can be used for the treatment of power plant denitration desulfurization waste water nearby, avoids the cost increase that the transportation caused and reveal the potential safety hazard that causes.
Description
Technical Field
The utility model relates to the technical field of power plant waste heat utilization, in particular to a power plant waste heat steam utilization evaporator.
Background
The thermal power plant is a thermal power plant for short, and is a plant for producing electric energy by using combustible materials such as coal and the like as fuel. In the power generation process of a thermal power plant, flue gas generated by burning fuel can reach the emission standard through desulfurization and denitrification treatment, and high-salt wastewater generated after desulfurization and denitrification is easy to cause harm to surrounding ecological environment, so that an evaporator is usually required to be used for evaporation and concentration to realize emission.
When the evaporator runs, a large amount of heat is consumed to evaporate and concentrate desulfurization and denitrification wastewater, the cost is high, the desulfurization and denitrification wastewater still needs to be transported to a special wastewater treatment site for evaporation and concentration treatment, the treatment cost of the desulfurization and denitrification wastewater is further increased due to the existence of transportation cost, and the risk of leakage exists in the desulfurization and denitrification wastewater in the transportation process.
Therefore, there is a need for an improvement in the evaporative concentration device for desulfurization and denitrification wastewater generated after the power generation operation of a power plant in the prior art.
Disclosure of utility model
The utility model aims to overcome the defects in the prior art and provide the power plant waste heat steam utilization evaporator which is low in energy consumption, low in treatment cost, safe and reliable.
In order to achieve the technical effects, the technical scheme of the utility model is as follows: a power plant waste heat steam utilization evaporator, comprising:
the input end of the feed pump is used for introducing desulfurization and denitrification wastewater;
The preheating unit is provided with a preheating material inlet, a preheating material outlet, a preheating non-condensable gas outlet, a preheating condensate water inlet, a preheating condensate water outlet and a preheating secondary steam inlet, and the preheating material inlet is connected with the output end of the feed pump;
The heating device comprises a heater, a heating device and a heating device, wherein the heater is provided with a heating material inlet, a heating material outlet, a waste heat steam inlet, a heating noncondensable gas outlet and a heating condensate water outlet, the heating material inlet is connected with the preheating material outlet, the waste heat steam inlet is used for introducing waste heat steam generated during operation of a thermal power plant, and the heating condensate water outlet is connected with the preheating condensate water inlet;
The input end of the vacuum pump is connected with the heating noncondensable gas outlet and the preheating noncondensable gas outlet, and the output end of the vacuum pump is connected with the outside;
A condensing tank having a condensing inlet communicating with the preheating condensed water outlet and a condensing outlet communicating with the outside;
the separation unit is provided with a separation inlet, a separation outlet and a secondary steam outlet, the separation inlet is connected with the heating material outlet, and the secondary steam outlet is connected with the preheating secondary steam inlet;
And the solid-liquid separation assembly is connected with the separation outlet to separate mother liquor and solids.
Preferably, in order to realize the preheating treatment of the denitration and desalination wastewater materials and discharge noncondensable gas generated by preheating, the preheating unit comprises a plurality of preheaters which are sequentially connected in series, each preheater is provided with a material preheating inlet, a material preheating outlet, a condensation preheating inlet, a condensation preheating outlet, a preheating secondary steam inlet and a preheating noncondensable gas outlet, the material preheating outlet of the former preheater is connected with the material preheating inlet of the latter preheater along the flow direction of the materials, and the condensation preheating inlet of the latter preheater is connected with the condensation preheating outlet of the former preheater.
Preferably, in order to improve the separation effect, the heat of preheating is fully utilized simultaneously to preheat denitration desalination waste water material, the separation unit includes a plurality of first-stage separators that establish ties in proper order, and each first-stage separator all has one-stage separation import, one-stage separation export and one-stage secondary steam export, along the material flow direction, between two adjacent first-stage separators, the one-stage separation export of preceding first-stage separator is connected with the one-stage separation import of the one-stage separator of later.
Preferably, in order to facilitate the assembly of the evaporator, the heat energy is fully utilized to preheat the denitration and desalination wastewater, the primary separator corresponds to the preheater one by one, and the primary secondary steam outlet is communicated with the preheating secondary steam inlet of the corresponding preheater.
Preferably, in order to improve the preheating effect and ensure the consistency of the material after the heating treatment, the number of the preheaters is more than three.
Preferably, in order to further fully utilize the waste heat for heating treatment, a circulating condensing unit is further arranged between the separation outlet and the solid-liquid separation assembly, the circulating condensing unit comprises a condenser and a secondary separator, the condenser is provided with a circulating water inlet, a circulating water outlet, a secondary steam inlet, a circulating condensate water inlet communicated with the preheated condensate water outlet and a circulating condensate water outlet communicated with the condensation inlet, the secondary separator comprises a secondary separation inlet, a secondary separation outlet and a secondary steam outlet, the secondary separation inlet is connected with the separation outlet, the secondary separation outlet is connected with the solid-liquid separation assembly, and the secondary steam outlet is connected with the secondary steam inlet.
Preferably, in order to realize multistage separation and guarantee material separation effect, the second-stage separators are provided with at least two and are connected in series in sequence, along the material flow direction, between two adjacent second-stage separators, the first second-stage separation inlet is connected with the second-stage separation outlet.
Preferably, in order to realize recycling of the mother liquor after solid-liquid separation, the solid-liquid separation assembly is further used for conveying the mother liquor after solid-liquid separation into the preheating unit through the separation inlet.
Preferably, in order to realize solid-liquid separation and simultaneously convey the mother liquor generated by separation to a preheating unit for concentration treatment again, the solid-liquid separation assembly comprises a discharge pump and a crystallization tank, the crystallization tank is provided with a waste liquor inlet and a mother liquor outlet, the separation outlet is connected with the waste liquor inlet through the discharge pump, and the mother liquor outlet is connected with the input end of the feed pump.
Preferably, to facilitate the discharge of the solid material, the crystallization tank is further provided with a salt slurry outlet for connection to a centrifuge.
In summary, compared with the prior art, the power plant waste heat steam utilization evaporator disclosed by the utility model has the advantages that the power plant waste heat steam is used as a heat source, the preheating unit and the heater are used for heating materials, so that the concentration of the materials is continuously increased after flash evaporation, and the mother liquor and the solids are separated through the solid-liquid separation assembly, so that the heat of the battery waste heat steam is fully utilized, the energy consumption is reduced, the power plant waste heat utilization evaporator can be used for treating the power plant de-sales desulfurization waste water nearby, and the cost increase caused by transportation and the potential safety hazard caused by leakage are avoided.
Drawings
FIG. 1 is a schematic diagram of a power plant waste heat steam utilizing evaporator according to the present utility model;
FIG. 2 is a schematic diagram of the construction of the waste heat steam utilizing evaporator of the power plant of the present utility model in relation to materials;
FIG. 3 is a schematic diagram of the construction of the power plant waste heat steam utilizing evaporator of the present utility model in relation to steam, non-condensable gases;
In the figure: 1. a feed pump; 2. a preheating unit; 21. a preheater; 211. a material preheating inlet; 212. a material preheating outlet; 213. condensing and preheating an inlet; 214. a condensing and preheating outlet; 215. preheating a secondary steam inlet; 216. preheating a non-condensable gas outlet; 3. a heater; 31. heating a material inlet; 32. a heating material outlet; 33. a waste heat steam inlet; 34. heating the non-condensable gas outlet; 35. heating a condensed water outlet; 4. a vacuum pump; 41. an air inlet pipe; 5. a condensing tank; 51. a condensing inlet; 52. a condensation outlet; 53. a non-condensable gas port; 6. separating a unit; 61. a primary separator; 611. a primary separation inlet; 612. a primary separation outlet; 613. a primary secondary steam outlet; 7. a solid-liquid separation assembly; 71. a discharge pump; 72. a crystallization tank; 721. a waste liquid inlet; 722. a mother liquor outlet; 723. a salt slurry outlet; 8. a circulating condensing unit; 81. a condenser; 811. a circulating water inlet; 812. a circulating water outlet; 813. a secondary steam inlet; 814. a circulating condensate inlet; 815. a circulating condensate outlet; 82. a secondary separator; 821. a secondary separation inlet; 822. a secondary separation outlet; 823. and a secondary steam outlet.
Detailed Description
The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
As shown in fig. 1 to 3, the power plant waste heat steam utilization evaporator of the present utility model comprises:
the input end of the feed pump 1 is used for introducing desulfurization and denitrification wastewater;
The preheating unit 2 is provided with a preheating material inlet, a preheating material outlet, a preheating non-condensable gas outlet 216, a preheating condensate water inlet, a preheating condensate water outlet and a preheating secondary steam inlet 215, wherein the preheating material inlet is connected with the output end of the feed pump 1;
The heater 3 is provided with a heating material inlet 31, a heating material outlet 32, a waste heat steam inlet 33, a heating non-condensable gas outlet 34 and a heating condensate water outlet 35, wherein the heating material inlet 31 is connected with the preheating material outlet, the waste heat steam inlet 33 is used for introducing waste heat steam generated during the operation of the thermal power plant, and the heating condensate water outlet 35 is connected with the preheating condensate water inlet;
The input end of the vacuum pump 4 is connected with the heating noncondensable gas outlet 34 and the preheating noncondensable gas outlet 216, and the output end is connected with the outside;
A condensing tank 5, the condensing tank 5 having a condensing inlet 51 communicating with the preheated condensate outlet and a condensing outlet 52 communicating with the outside;
The separation unit 6 is provided with a separation inlet, a separation outlet and a secondary steam outlet, wherein the separation inlet is connected with the heating material outlet 32, and the secondary steam outlet is connected with the preheating secondary steam inlet 215;
and the solid-liquid separation assembly 7 is connected with the separation outlet to separate mother liquor and solids.
Compared with the prior art, the waste heat steam utilization evaporator for the power plant can be directly arranged in the thermal power plant, so that the cost increase and the potential safety hazard caused by transportation are avoided, and meanwhile, the waste heat steam of the power plant is fully utilized for heating and concentrating the desulfurization and denitrification wastewater (hereinafter referred to as "materials"), so that the energy consumption required by the evaporation and concentration of the desulfurization and denitrification wastewater is greatly reduced, and the energy saving and cost reduction are realized.
In order to ensure the preheating effect of materials, in the utility model, the preheating unit 2 comprises seven preheaters 21, the seven preheaters 21 are sequentially connected in series, each of the seven preheaters 21 is provided with a material preheating inlet 211, a material preheating outlet 212, a condensation preheating inlet 213, a condensation preheating outlet 214, a preheating secondary steam inlet 215 and a preheating noncondensable gas outlet 216, the material preheating outlet 212 of the former preheater 21 is connected with the material preheating inlet 211 of the latter preheater 21 along the material flow direction, the condensation preheating inlet 213 of the latter preheater 21 is connected with the condensation preheating outlet 214 of the former preheater, so that the material preheating inlet 211 of the first preheater 21 forms a preheating material inlet of the preheating unit 2 and is connected with the input end of the feed pump 1, and the material preheating outlet 212 of the terminal preheater 21 forms a preheating material outlet of the preheating unit 2 and is connected with the heating material inlet 31 of the heater 3; the preheating noncondensable gas outlets 216 of the seven preheaters 21 are the preheating noncondensable gas outlets 216 of the preheating unit 2, and the preheating noncondensable gas outlets 216 are connected with the input end of the vacuum pump 4.
In order to improve the separation effect and facilitate assembly, in the utility model, the separation unit 6 comprises seven first-stage separators 61, the seven first-stage separators 61 are sequentially connected in series and the seven first-stage separators 61 are in one-to-one correspondence with the seven preheaters 21, specifically, the seven first-stage separators 61 are respectively provided with a first-stage separation inlet 611, a first-stage separation outlet 612 and a first-stage secondary steam outlet 613, and the first-stage separation outlet 612 of the first-stage separator 61 is connected with the first-stage separation inlet 611 of the subsequent first-stage separator 61 along the material flow direction between the two adjacent first-stage separators 61, and the first-stage secondary steam outlet 613 of each first-stage separator 61 is communicated with the preheating secondary steam inlet 215 of the corresponding preheater 21; the first stage separation inlet 611 of the first stage separator 61 is a separation inlet of the separation unit 6, and the first stage separation outlet 612 of the second stage separator 61 is a separation outlet of the separation unit 6.
A circulating condensing unit 8 is further arranged between the separation outlet and the solid-liquid separation assembly 7, the circulating condensing unit 8 comprises a condenser 81 and a secondary separator 82, the condenser 81 is provided with a circulating water inlet 811, a circulating water outlet 812, a secondary steam inlet 813, a circulating condensate water inlet 814 communicated with the preheated condensate water outlet and a circulating condensate water outlet 815 communicated with the condensate inlet 51, the secondary separator 82 comprises a secondary separation inlet 821, a secondary separation outlet 822 and a secondary steam outlet 823, the secondary separation inlet 821 is connected with the separation outlet, the secondary separation outlet 822 is connected with the solid-liquid separation assembly 7, and the secondary steam outlet 823 is connected with the secondary steam inlet 813.
In a preferred embodiment, the two-stage separators 82 are provided with three two-stage secondary steam outlets 823 which are sequentially connected in series, and the two-stage secondary steam outlets 823 of the three two-stage separators 82 are connected with the two-stage secondary steam inlet 813 of the condenser 81, the front two-stage separation inlet 821 is connected with the rear two-stage separation outlet 822, the two-stage separation inlet 821 of the head two-stage separator 82 is connected with the separation outlet, and the two-stage separation outlet 822 of the tail two-stage separator 82 is connected with the solid-liquid separation assembly 7.
The solid-liquid separation assembly 7 is further improved to be used for conveying the mother solution after solid-liquid separation into the preheating unit 2 through a separation inlet.
Specifically, the solid-liquid separation assembly 7 includes a discharge pump 71 and a crystallization tank 72, the crystallization tank 72 has a waste liquid inlet 721 and a mother liquor outlet 722, a secondary separation outlet 822 of the terminal secondary separator 82 is connected with an input end of the discharge pump 71, an output end of the discharge pump 71 is connected with the waste liquid inlet 721, the mother liquor outlet 722 is connected with an input end of the feed pump 1, the crystallization tank 72 further has a salt slurry outlet 723, and the salt slurry outlet 723 is used for connecting a centrifuge, and centrifugal separation treatment is performed on salt slurry of high consistency by the centrifuge.
The top of the condensing tank 5 is also provided with a non-condensable gas port 53, and the non-condensable gas port 53 is communicated with the preheated non-condensable gas outlet 216, the heated non-condensable gas outlet 34 and the input end of the vacuum pump 4.
After the structure is adopted, when the power plant waste heat steam utilizes the evaporator to operate, waste heat steam generated during operation of the thermal power plant is introduced into the waste heat steam inlet 33 of the heater 3, materials to be treated enter the preheating unit 2 through the feed pump 1, specifically, the materials sequentially pass through each preheater 21 of the preheating unit 2, and secondary steam generated by flash evaporation of the corresponding primary separator 61 in the separation unit 6 exchanges heat during the flowing process of the preheaters 21, so that the materials sequentially pass through the seven preheaters 21 and sequentially exchange heat with secondary steam generated by flash evaporation of the seven primary separators 61, and the preheating effect on the materials is improved.
The preheated material temperature rises and enters the heater 3 through the heated material inlet 31, heat exchange is carried out between the preheated material and waste heat steam generated by a thermal power plant in the flowing process in the heater 3, the preheated material is heated again by the preheated steam, then the material which is heated again is introduced into the separation unit 6, sequentially passes through each primary separator 61 in series, flash-flashes rapidly in the primary separator 61 to generate secondary steam, and the secondary steam is introduced into the preheated secondary steam inlets 215 of the preheaters 21 of the preheating unit 2.
Thus, after the materials sequentially pass through the primary separators 61, they enter the circulating condensing unit 8, and sequentially pass through the three secondary separators 82 connected in series, and in the process of flowing in the secondary separators 82, secondary steam is generated through rapid flash evaporation, and the secondary steam is introduced into the condenser 81.
After the materials pass through the plurality of first-stage separators 61 and the second-stage separators 82, the concentration is greatly increased, at the moment, a discharge pump 71 in a solid-liquid separation assembly 7 is started, high-concentration materials are extracted and conveyed into a crystallization tank 72, crystal slurry in the crystallization tank 72 is discharged through a salt slurry outlet 723 and is introduced into a centrifugal machine for centrifugal treatment, mother liquor is mixed with the introduced materials to be treated and then conveyed into a preheating unit 2 through a feed pump 1, and then the mixture is subjected to evaporation concentration treatment through a heater 3 and a separation unit 6.
In the material flowing process, waste heat steam generated by the operation of the thermal power plant continuously enters the heater 3 through the waste heat steam inlet 33, after exchanging heat with the material, the waste heat steam is condensed to form condensed water, the condensed water enters the preheating unit 2, sequentially passes through the condensation preheating inlet 213 and the condensation preheating outlet 214 of each preheater 21, and after the condensed water is introduced into the shell pass of the preheater 21, the pressure is reduced, the condensed water flashes off steam to exchange heat with the material flowing in the preheater 21, so that the preheating treatment of the material is realized.
The steam formed by flash evaporation of the condensed water forms condensed water again after heat exchange with the material, and is introduced into the next preheater 21, after the pressure in the preheater 21 is reduced, the flash evaporation forms steam to exchange heat with the material, so that the condensed water formed by multiple flash evaporation and multiple heat exchange is introduced into the shell side of the condenser 81, and due to the reduction of the pressure, the condensed water flashes out the heat exchange between the steam and the circulating cooling water in the tube side of the condenser 81 and is condensed again to form condensed water.
In the circulating condensing unit 8, the secondary steam generated by the secondary separator 82 is discharged through the secondary steam outlet 823, is introduced into the shell side of the condenser 81, and is condensed in the shell side of the condenser 81 to form condensed water.
Condensed water formed by condensation in the condenser 81 is introduced into the condensation tank 5 and discharged out of the system through the condensation outlet 52.
In the operation process of the heater 3, noncondensable gas formed after heat exchange of waste heat steam and noncondensable gas formed after preheating of materials by steam in the preheater 21 enter the condensation tank 5 through the condensation outlet 52, then the vacuum pump 4 is started, noncondensable gas in the condensation tank 5 is pumped through the vacuum pump 4, and the noncondensable gas is discharged out of the system. The input end of the vacuum pump 4 is also connected with an air inlet pipe 41, and the opening degree of the air inlet pipe 41 is adjusted to realize the adjustment of the vacuum degree of the system.
In summary, the waste heat steam utilizing evaporator of the utility model adopts the waste heat steam of the power plant as a heat source, the waste heat steam enters the heater 3 through the pipeline to heat the material, the heated material sequentially enters the plurality of first-stage separators 61 and the plurality of second-stage separators 82 to flash gradually, and the water content is continuously evaporated and the concentration is continuously increased after the material is subjected to multi-stage flash evaporation. When the material reaches the discharge concentration, the material is discharged to a crystallization tank 72 by a discharge pump 71, crystal slurry at the bottom of the crystallization tank 72 enters a centrifugal machine for centrifugal separation, and the solid obtained by the centrifugal separation is discharged out of the system. After the centrifugal mother liquor is mixed with the raw materials, the mixture is conveyed to a multi-stage preheater 21 by a feed pump 1, and the multi-stage preheater 21 utilizes secondary steam of multi-stage flash evaporation to preheat the feed. The material after the multi-stage preheating enters a heater 3 to further improve the feeding temperature. The secondary steam generated by flash evaporation of the final stage, namely the tail end secondary separator 82, enters the condenser 81 to exchange heat with circulating cooling water and then is condensed, and the condensed water enters the condensing tank 5 and is discharged out of the system through a condensing water pump.
The waste heat steam utilizing evaporator has the advantages of low energy consumption, scaling prevention, easy installation, low equipment height and the like, and has low temperature and flow requirements on heat source waste heat steam, so that the evaporator is particularly suitable for treating desulfurization and denitrification wastewater by utilizing power plant waste heat steam.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.
Claims (10)
1. A power plant waste heat steam utilization evaporator, comprising:
The device comprises a feed pump (1), wherein the input end of the feed pump (1) is used for introducing desulfurization and denitrification wastewater;
The preheating unit (2) is provided with a preheating material inlet, a preheating material outlet, a preheating non-condensable gas outlet (216), a preheating condensate water inlet, a preheating condensate water outlet and a preheating secondary steam inlet (215), and the preheating material inlet is connected with the output end of the feed pump (1);
The heater (3) is provided with a heating material inlet (31), a heating material outlet (32), a waste heat steam inlet (33), a heating non-condensable gas outlet (34) and a heating condensate water outlet (35), wherein the heating material inlet (31) is connected with the preheating material outlet, the waste heat steam inlet (33) is used for introducing waste heat steam generated during operation of a thermal power plant, and the heating condensate water outlet (35) is connected with the preheating condensate water inlet;
the input end of the vacuum pump (4) is connected with the heating noncondensable gas outlet (34) and the preheating noncondensable gas outlet (216), and the output end of the vacuum pump is connected with the outside;
a condensing tank (5), the condensing tank (5) having a condensing inlet (51) communicating with the preheated condensate outlet and a condensing outlet (52) communicating with the outside;
A separation unit (6), the separation unit (6) having a separation inlet, a separation outlet and a secondary steam outlet, the separation inlet being connected to the heating material outlet (32), the secondary steam outlet being connected to the preheating secondary steam inlet (215);
And the solid-liquid separation assembly (7) is connected with the separation outlet to separate mother liquor and solids.
2. The power plant waste heat steam utilization evaporator of claim 1, wherein: the preheating unit (2) comprises a plurality of preheaters (21) which are sequentially connected in series, each preheater (21) is provided with a material preheating inlet (211), a material preheating outlet (212), a condensation preheating inlet (213), a condensation preheating outlet (214), a preheating secondary steam inlet (215) and a preheating non-condensable gas outlet (216), the material preheating outlet (212) of the former preheater (21) is connected with the material preheating inlet (211) of the latter preheater (21), and the condensation preheating inlet (213) of the latter preheater (21) is connected with the condensation preheating outlet (214) of the former preheater.
3. The power plant waste heat steam utilization evaporator of claim 2, wherein: the separation unit (6) comprises a plurality of first-stage separators (61) which are sequentially connected in series, each first-stage separator (61) is provided with a first-stage separation inlet (611), a first-stage separation outlet (612) and a first-stage secondary steam outlet (613), and the first-stage separation outlet (612) of the former first-stage separator (61) is connected with the first-stage separation inlet (611) of the latter first-stage separator (61) along the material flow direction between two adjacent first-stage separators (61).
4. A power plant waste heat steam utilizing evaporator as set forth in claim 3, wherein: the primary separators (61) are in one-to-one correspondence with the preheaters (21), and the primary secondary steam outlets (613) are communicated with the preheating secondary steam inlets (215) of the corresponding preheaters (21).
5. The power plant waste heat steam utilizing evaporator as set forth in claim 4, wherein: the number of preheaters (21) is greater than three.
6. The power plant waste heat steam utilization evaporator of claim 1, wherein: the circulating condensing unit (8) is further arranged between the separation outlet and the solid-liquid separation assembly (7), the circulating condensing unit (8) comprises a condenser (81) and a secondary separator (82), the condenser (81) is provided with a circulating water inlet (811), a circulating water outlet (812), a secondary steam inlet (813), a circulating condensate water inlet (814) communicated with the preheated condensate water outlet and a circulating condensate water outlet (815) communicated with the condensation inlet (51), the secondary separator (82) comprises a secondary separation inlet (821), a secondary separation outlet (822) and a secondary steam outlet (823), the secondary separation inlet (821) is connected with the separation outlet, the secondary separation outlet (822) is connected with the solid-liquid separation assembly (7), and the secondary steam outlet (823) is connected with the secondary steam inlet (813).
7. The power plant waste heat steam utilizing evaporator of claim 6, wherein: the two-stage separators (82) are provided with at least two and are sequentially connected in series, and a front two-stage separation inlet (821) is connected with a rear two-stage separation outlet (822) between two adjacent two-stage separators (82) along the material flow direction.
8. The power plant waste heat steam utilization evaporator of claim 1, wherein: the solid-liquid separation assembly (7) is also used for conveying the mother liquor after solid-liquid separation into the preheating unit (2) through the separation inlet.
9. The power plant waste heat steam utilizing evaporator of claim 8, wherein: the solid-liquid separation assembly (7) comprises a discharge pump (71) and a crystallization tank (72), the crystallization tank (72) is provided with a waste liquid inlet (721) and a mother liquid outlet (722), the separation outlet is connected with the waste liquid inlet (721) through the discharge pump (71), and the mother liquid outlet (722) is connected with the input end of the feed pump (1).
10. The power plant waste heat steam utilizing evaporator of claim 9, wherein: the crystallization tank (72) also has a salt slurry outlet (723), which salt slurry outlet (723) is used in connection with a centrifuge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323119615.XU CN221565850U (en) | 2023-11-17 | 2023-11-17 | Power plant waste heat steam utilization evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323119615.XU CN221565850U (en) | 2023-11-17 | 2023-11-17 | Power plant waste heat steam utilization evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221565850U true CN221565850U (en) | 2024-08-20 |
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| CN202323119615.XU Active CN221565850U (en) | 2023-11-17 | 2023-11-17 | Power plant waste heat steam utilization evaporator |
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| CN (1) | CN221565850U (en) |
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