CN210505922U - System for inhibiting calcium salt scaling by external crystal seed method - Google Patents
System for inhibiting calcium salt scaling by external crystal seed method Download PDFInfo
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- CN210505922U CN210505922U CN201921068918.4U CN201921068918U CN210505922U CN 210505922 U CN210505922 U CN 210505922U CN 201921068918 U CN201921068918 U CN 201921068918U CN 210505922 U CN210505922 U CN 210505922U
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Abstract
The utility model discloses a system for calcium salt scale deposit is suppressed to outside seed crystal method, include: the system comprises a raw slurry buffer tank, a seed crystal reactor, a filter and a heater; two liquid discharge ports of the raw slurry buffer tank are provided, a first liquid discharge port is communicated with the liquid inlet of the heater, and a second liquid discharge port is communicated with the liquid inlet of the seed crystal reactor; the overflow port of the crystal seed reactor is communicated with the liquid inlet of the filter, and the liquid outlet of the filter is communicated with the liquid inlet of the heater. Through the system, the calcium salt concentration and the supersaturation degree of the water solution can be effectively reduced, the precipitation of calcium salt is inhibited, and then the technical problems that the water solution is scaled on the heat exchange wall surface in the heat exchange process, the heat exchange efficiency is reduced, the system operation is unstable and the like are finally caused are solved, so that the heat exchange efficiency of the heat exchange system is improved, and the stability of the system operation is enhanced.
Description
Technical Field
The utility model relates to a heat transfer system field especially relates to a system of calcium salt scale deposit is suppressed to outside seed crystal method.
Background
The formation and removal of calcium scale in thermal power plants, chemical industries and energy production is a long-standing and difficult problem to solve. According to the records of related data, when the thickness of the scale is 0.5mm, the heat transfer coefficient of the heat exchange system is reduced by 30%, and when the thickness of the scale is increased to 1mm, the heat transfer coefficient of the heat exchange system is reduced by 50%, so that the heat exchange performance of the heat exchanger is greatly influenced by the existence of the scale. Simultaneously, the formation of scale can also lead to the reduction of the flow cross section of the fluid, the blockage of pipelines, the increase of the conveying energy consumption of a pump, the reduction of the service life of equipment and other problems, and even cause destructive accidents in severe cases.
Therefore, the inhibition of the formation of scale is the key for ensuring the stable operation of the heat exchange system, and the generation mechanism of the scale is the foundation for researching the scale inhibition method. The generation mechanism of the calcium scale is as follows: the precipitation process of the calcium salt generally goes through three states of a stable state (the concentration is less than or equal to the saturated concentration), a metastable state (the concentration is greater than the saturated concentration, but a certain time interval is needed to precipitate the calcium salt or seed crystals are needed to promote the precipitation of the calcium salt) and an unstable state (the calcium salt is immediately precipitated). The temperature of the slurry rises in the heat exchange process, water is evaporated, the solubility of calcium salt is changed, the concentration of calcium salt is increased, when the concentration of calcium salt exceeds the saturated concentration, the slurry enters a metastable state from a stable state and even directly enters an unstable state, so that the calcium salt is separated out and deposited on the surface of a heat exchanger, the separated calcium salt is used as a seed crystal to provide a new growth site for the salt, the growth of the salt on the tube wall is accelerated, and finally a compact and hard scale layer is formed on the wall surface of the heat exchanger.
The method for preventing and removing scale at present generally comprises the following steps of pretreatment for removing hardness, adding a scale inhibitor, removing scale by adopting a physical and chemical method, circulating crystal seeds in a heat exchange system for inhibiting scale and the like, wherein:
the method of adding chemicals for hardness removal and adding scale inhibitor in pretreatment needs to add chemical agents into the slurry, thus increasing the operating cost of the system.
After the heat exchanger forms a scale layer, if the pipe is easy to damage by mechanical descaling, the pipe wall is rough and uneven, the surface energy of the pipe wall is increased, so that the scale is easier to deposit on the surface of the pipe wall in the heat exchange process; although the high-pressure water gun can thoroughly clean the scale, the consumption of manpower and material resources is high, and the economical efficiency is poor; chemical descaling requires a large amount of chemicals, the production cost is high, and the cleaning solution causes environmental pollution, which is not favorable for green sustainable development.
The method of circulating the seed crystal inside the heat exchange system to inhibit scale deposition on the wall surface needs precise control of the seed crystal adding amount. The addition of the crystal seeds can greatly reduce the nucleation potential barrier of calcium salt, if the addition amount of the crystal seeds is small, the growth sites provided by the crystal are insufficient, and part of calcium salt can adhere to the surface of the tube wall to grow, so that the tube wall scaling is accelerated; if the addition amount of the seed crystal is too large, the fluid flow rate is required to be large enough to ensure that crystal particles cannot stay and grow on the wall surface, equipment parameters of a system pump are required to be increased when the fluid flow rate is increased, and meanwhile, the heat exchange efficiency in the heat exchange tube is reduced due to the increase of the amount of solid-phase crystals.
Therefore, the method and the process which can ensure high heat exchange efficiency and long-term stable operation of the heat exchanger and can directionally control the scale formation of the calcium salt are the problems which need to be solved urgently at the present stage.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
The utility model aims at providing a system of calcium salt scale deposit is suppressed in order to solve because the inside scale formation of heat transfer system leads to the problem that heat exchange efficiency descends to outside seed crystal method.
(II) technical scheme
In order to solve the above problem, a first aspect of the present invention provides a system for inhibiting scale formation of calcium salt by using an external seed crystal method, comprising: the device comprises a raw slurry buffer tank, a heater, a seed crystal reactor and a filter; two liquid discharge ports of the raw slurry buffer tank are provided, a first liquid discharge port is communicated with the liquid inlet of the heater, and a second liquid discharge port is communicated with the liquid inlet of the seed crystal reactor; the overflow port of the crystal seed reactor is communicated with the liquid inlet of the filter, and the liquid outlet of the filter is communicated with the liquid inlet of the heater.
Further, the seed reactor comprises: the device comprises a cylindrical body part and a conical body part, wherein one end of the cylindrical body part is connected with a wide opening of the conical body part; the radial side wall of the cylinder body part is provided with an overflow port and a liquid inlet, the cylinder body part is provided with a liquid inlet at a position close to the cone body part, and the bottom of the cone is provided with a crystal slurry outlet.
Further, the overflow port is arranged at a position far away from the side wall of the cone part, and the liquid inlet is arranged at a position close to the side wall of the cone part.
Further, the crystal slurry outlet is arranged at the bottom of the cone.
Further, a stirrer is arranged inside the seed crystal reactor.
Further, a mud level meter is arranged at the bottom of the seed crystal reactor.
Furthermore, a back flush water inlet and a back flush water return port are arranged on the filter; the back-flushing water inlet is communicated with the water outlet of the raw slurry buffer tank, and the back-flushing water return port is communicated with the liquid inlet of the seed crystal reactor.
Further, the pressure difference meter is also included; the differential pressure gauge is disposed outside the filter.
According to another aspect of the present invention, there is provided a directional scaling method for inhibiting a calcium salt scaling system by using an external seed crystal method, comprising: allowing part or all of the raw slurry to be treated to enter a seed crystal reactor according to any one of the above schemes to contact and react with the seed crystal, so that the calcium scale is directionally grown on the surface of the seed crystal to reduce the supersaturation degree of calcium salt in the raw slurry; feeding the slurry flowing out of the overflow port of the seed crystal reactor into a filter according to any one of the above schemes for filtering to remove crystals carried out by the seed crystal reactor in the slurry; the filtered low supersaturation degree slurry or the mixed liquid of the filtered low supersaturation degree slurry and the original slurry enters the heater according to any one of the above schemes, wherein the supersaturation degree of the slurry in the heater is always maintained in a metastable zone range, and the precipitation and scaling of calcium salt on the wall of the heat exchange tube are inhibited.
Further, after the contact reaction of the crystal seeds and the original slurry, the larger crystals settle at the bottom of the crystal seed reactor and are discharged from a crystal slurry discharge port, and the crystals which meet the requirements and are screened out after the crystal slurry is treated are used as the crystal seeds for the contact reaction with the original slurry.
(III) advantageous effects
The above technical scheme of the utility model has following profitable technological effect:
by the system and the method, the concentration and supersaturation degree of calcium salt in the water solution can be effectively reduced, precipitation of calcium salt is inhibited, and the technical problems that the heat exchange efficiency is reduced, the system is unstable and the like due to scaling of the water solution on the heat exchange wall surface in the heat exchange process are solved, so that the heat exchange efficiency of a heat exchange system is improved, and the stability of system operation is enhanced.
Drawings
FIG. 1 is a schematic block diagram of a system for preventing calcium salt scale formation according to a first embodiment of the present invention;
fig. 2 is a schematic diagram of a seed crystal reactor according to an alternative embodiment of the present invention.
Reference numerals:
1: a raw slurry buffer tank; 2: a seed crystal reactor; 3: a filter; 4: a heater; 21: an overflow port; 22: a liquid inlet; 23: a crystal slurry outlet; 24: a stirrer; 25: a seed crystal addition port.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
In a first aspect of the embodiments of the present invention, there is provided a system for inhibiting calcium salt scaling by an external seed crystal method, including: the system comprises a raw slurry buffer tank 1, a seed crystal reactor 2, a filter 3 and a heater 4; two liquid discharge ports of the raw slurry buffer tank 1 are provided, the first liquid discharge port is communicated with the liquid inlet of the heater 4, and the second liquid discharge port is communicated with the liquid inlet 22 of the seed crystal reactor 2; the overflow port 21 of the crystal seed reactor 2 is communicated with the liquid inlet of the filter 3, and the liquid outlet of the filter 3 is communicated with the liquid inlet of the heater 4. The crystal seeds in the crystal seed reactor 2 are optimally and reasonably configured, and the addition amount and the size of the crystal seeds are determined according to the change of water quality, water quantity and slurry temperature. The system can ensure that the supersaturation degree of the slurry in the heating process is always in the metastable zone range, and the filtered slurry has no large-particle crystal seeds and is introduced into the heater 4, thereby ensuring the directional scale prevention and scale inhibition of the heating device and the long-term stable operation.
Optionally, the seed reactor 2 comprises: the cone-shaped part is arranged on the barrel body part, and one end of the barrel body part is connected with a wide opening of the cone-shaped part; the radial side wall of the cylinder body part is provided with an overflow port 21 and a liquid inlet 22, the liquid inlet 22 is arranged at the position of the cylinder body part close to the cone part, and the bottom of the cone part is provided with a crystal slurry outlet 23. And one end of the barrel part, which is far away from the cone part, is provided with a seed crystal adding port 25 for adding seed crystals.
Optionally, the overflow port 21 is disposed at a position far away from the side wall of the cone portion, and the liquid inlet 22 is disposed at a position close to the side wall of the cone portion. This arrangement ensures that the seeds are evenly distributed in the aqueous solution and the liquid exiting the overflow 21 is the supernatant carrying the fine crystals.
Optionally, the slurry outlet 23 is arranged at the bottom of the cone. To discharge large-sized crystals deposited on the bottom.
Optionally, a stirrer 24 is provided inside the seed reactor 2. This arrangement can further ensure uniform distribution of the seed crystals.
Optionally, a mud level meter is arranged at the bottom of the seed crystal reactor 2. The mud level meter is used for monitoring the amount of large-particle crystals settled at the bottom so as to determine the discharge time of the crystal mush.
Optionally, the filter 3 is provided with a back flush water inlet and a back flush water return port; the back washing water inlet is communicated with the water outlet of the raw slurry buffer tank 1, and the back washing water return port is communicated with the liquid inlet 22 of the seed crystal reactor 2. The arrangement can effectively and fully utilize the seed crystal.
Optionally, the method further includes: a differential pressure gauge; the differential pressure gauge is disposed outside the filter 3. For detecting the pressure difference between the aqueous solution entering and exiting the filter 3.
In another aspect of the embodiments of the present invention, there is provided a directional scaling method for inhibiting a calcium salt scaling system by using an external seed crystal method, including:
t1: allowing part or all of the raw slurry to be treated to enter a seed crystal reactor as described in any one of the above embodiments to contact and react with the seed crystal, so that the calcium scale is directionally grown on the surface of the seed crystal to reduce the supersaturation degree of the calcium salt in the raw slurry;
t2: feeding the slurry flowing out of the overflow port of the seed crystal reactor into a filter as described in any one of the above embodiments for filtering to remove crystals carried out by the seed crystal reactor in the slurry;
t3: the filtered low supersaturation degree slurry or the mixed liquid of the filtered low supersaturation degree slurry and the original slurry enters the heater according to any one of the above embodiments, wherein the supersaturation degree of the slurry in the heater is always maintained in a metastable zone range, and the precipitation and scaling of calcium salt on the wall of the heat exchange tube are inhibited.
Optionally, after the contact reaction of the seed crystal and the original slurry, the larger crystals settle at the bottom of the seed crystal reactor and are discharged from the slurry discharge port, and the discharged slurry is processed to screen out crystals meeting the requirements as the seed crystal for reuse in the contact reaction of the seed crystal reactor and the original slurry.
Because the maximum supersaturation ratio of the calcium salt is A, when the supersaturation ratio of the calcium salt in the system is equal to or greater than A, the system is in an unstable state, the calcium salt can be immediately separated out, and when the supersaturation ratio of the slurry is controlled to be B, wherein B is less than A, the slurry system is in a metastable state, and the salting-out phenomenon basically cannot occur. The supersaturation ratio of the calcium salt of the obtained slurry with low supersaturation degree is equal to or less than B through the steps of the method of the embodiment, the formation of calcium scale can be effectively inhibited after the slurry is introduced into the heat exchange system, and the problem of heat exchange efficiency reduction caused by scale formation due to precipitation of the calcium salt in the heat exchange system is further solved.
In an optional embodiment, a system for inhibiting calcium salt scaling by an external seed crystal method is provided, which comprises a raw water buffer tank 1, a seed crystal reactor 2, a filter 3 and a heater 4, wherein the heating device is connected with an external heat source, a liquid inlet of the seed crystal reactor 2 is connected with a liquid outlet of the raw water buffer tank 1 through a water conveying pipeline, an overflow port of the seed crystal reactor 2 is connected with the filtering device through a water conveying pipeline, and a liquid outlet of the filtering device 3 is connected with a liquid inlet of the heating device 4 through a water conveying pipeline. Reduce the supersaturation and filter the processing of tiny crystal to the thick liquid through seed crystal reaction unit and filter equipment, reduced the supersaturation of the thick liquid that gets into heating device, increased the stability of thick liquid, restrained heating device's the formation of scale, prolonged heating device's steady operation time, improved heating device's heat exchange efficiency.
Optionally, a slurry tangential liquid inlet is formed in the lower portion of the upper barrel of the seed crystal reactor 2, a stirring device for stirring slurry and seed crystals is arranged at the bottom of the upper barrel, a slurry overflow port is formed in the side portion of the upper barrel, and a crystal slurry outlet is formed in the side portion of the lower conical device.
Optionally, pressure difference meters for detecting the pressure difference of the slurry at the inlet and the outlet are arranged on the uppermost layer water side and the lowermost layer water side of the filter 3, and the pressure difference between the inlet and the outlet is detected in real time through the pressure difference meters, so that the filter layer can be backwashed in time after a preset threshold value is reached.
Optionally, the sedimentation condition of the crystal slurry in the crystal seed reactor 2 is detected by a mud level meter in the crystal seed reactor 2, so that the crystal slurry can be discharged in time after a preset threshold value is reached.
Optionally, the seed crystal reactor 2 includes an upper cylinder and a lower cylinder, the upper cylinder is cylindrical, the lower cylinder is an inverted conical structure, an overflow port is arranged at the upper side of the upper cylinder, a liquid inlet is arranged at the lower part of the upper cylinder, and a crystal slurry outlet is arranged at the bottom of the lower cylinder. The slurry enters the seed crystal reactor 2 tangentially, and the slurry carries the seed crystal to move spirally along the inner wall of the seed crystal reactor 2, so that the seed crystal is uniformly distributed in the slurry. The calcium salt grows attached to the surface of the seed crystal in the movement process, one part of the crystal growing into large particles is subjected to larger gravity and centrifugal force, and then falls back to the bottom of the seed crystal reactor 2 and is discharged from a crystal slurry discharge port, the other part of the crystal formed by secondary nucleation and the crystal which is not grown yet are subjected to smaller gravity and centrifugal force, and the part of the crystal is discharged from an overflow port along with the slurry and enters a filter for filtration treatment.
Optionally, the filter 3 is provided with a back-washing liquid inlet and a back-washing water return port, the back-washing liquid inlet is connected with a liquid outlet of the raw water buffer tank through a water conveying pipeline, the back-washing water return port is connected with a liquid inlet of the seed crystal reactor 2 through a water conveying pipeline, solid impurities and fine crystals deposited on the filter are cleaned, and the cleaned liquid is conveyed into the seed crystal reactor 2 through the back-washing water return port to ensure stable filtration of the filter.
In an alternative embodiment, a method for directional scaling of a calcium salt scaling inhibition system by an external seed crystal method is provided, which comprises the following steps:
s1: part or all of the raw slurry enters the seed crystal reactor 2 to contact and react with the seed crystal, so that the calcium scale directionally grows on the surface of the seed crystal to reduce the supersaturation degree of the slurry entering the heater; specifically, raw slurry enters the seed crystal reactor from the lower part of the upper cylinder of the seed crystal reactor 2 in a tangential manner, the seed crystals are promoted to be uniformly distributed in the slurry in a rotational flow mode, a stirring paddle is added to stir and promote the uniform distribution of the seed crystals when necessary, when the seed crystals grow to a certain particle size, the seed crystals sink to the bottom of the seed crystal reactor under the action of larger gravity and centrifugal force and are discharged from a slurry discharge port, the discharged slurry is dehydrated and optimized, the treated crystals are recycled to the seed crystal reactor as the seed crystals, and the slurry with reduced supersaturation degree carries fine crystals to enter a filter from an overflow port for filtration treatment.
S2: the slurry flowing out of the overflow port of the crystal seed reactor 2 enters a filter for filtering so as to filter out crystals carried out by the crystal seed reactor 2 in the slurry;
s3: the filtered low supersaturation degree slurry or the mixed liquid of the filtered low supersaturation degree slurry and the original slurry enters a heater for heating, wherein the supersaturation degree of the slurry in the heater is always maintained in a metastable zone range, and calcium salt is inhibited from precipitating and scaling on the wall of a heat exchange tube;
s4: after the contact reaction of the seed crystal and the original slurry, the larger crystals settle at the bottom of the seed crystal reactor and are discharged from a slurry discharge port, and the discharged slurry is treated to screen out the crystals meeting the requirements as the seed crystal for the contact reaction with the original slurry.
The raw slurry of the raw water buffer tank 1 partially or totally enters the seed crystal reactor 2 to reduce the supersaturation degree, then enters the filter 3 to remove the fine crystal, the purer and lower supersaturation degree slurry produced by filtration is mixed with the raw slurry at the liquid inlet of the heater 4 (when part of slurry enters the seed crystal reactor 2) and enters the heater, thereby ensuring that the slurry exists in the heater in a low supersaturation degree state, simultaneously ensuring that the supersaturation degree of the slurry in the heating process is always in a metastable zone range, basically no seed crystal is introduced into the heater, ensuring the directional scale prevention and scale inhibition of the heating device and long-term stable operation.
The utility model discloses aim at protecting a system that outside seed crystal method restraines calcium salt scale deposit, include: the system comprises a raw slurry buffer tank 1, a seed crystal reactor 2, a filter 3 and a heater 4; two liquid discharge ports of the raw slurry buffer tank 1 are provided, a first liquid discharge port is communicated with the liquid inlet of the heater 4, and a second liquid discharge port is communicated with the liquid inlet of the seed crystal reactor 2; the overflow port of the crystal seed reactor 2 is communicated with the liquid inlet of the filter 3, and the liquid outlet of the filter 3 is communicated with the liquid inlet of the heater 4. Through the system, the calcium salt concentration and the supersaturation degree of the water solution can be effectively reduced, the precipitation of calcium salt is inhibited, and then the technical problems that the water solution is scaled on the heat exchange wall surface in the heat exchange process, the heat exchange efficiency is reduced, the system operation is unstable and the like are finally caused are solved, so that the heat exchange efficiency of the heat exchange system is improved, and the stability of the system operation is enhanced.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. A system for inhibiting calcium salt scale formation by an external seed method, comprising: the system comprises a raw slurry buffer tank (1), a seed crystal reactor (2), a filter (3) and a heater (4);
two liquid discharge ports of the raw slurry buffer tank (1), wherein a first liquid discharge port is communicated with a liquid inlet (22) of the heater (4), and a second liquid discharge port is communicated with the liquid inlet (22) of the seed crystal reactor (2);
an overflow port (21) of the seed crystal reactor (2) is communicated with a liquid inlet (22) of the filter (3), and a liquid outlet of the filter (3) is communicated with the liquid inlet (22) of the heater (4).
2. The system according to claim 1, wherein the seed reactor (2) comprises: the device comprises a cylindrical body part and a conical body part, wherein one end of the cylindrical body part is connected with a wide opening of the conical body part;
the radial side wall of the cylinder body part is provided with an overflow port (21) and a liquid inlet (22), the cylinder body part is close to the cone part and is provided with the liquid inlet (22), and the bottom of the cone part is provided with a crystal slurry outlet (23).
3. A system according to claim 2, characterized in that the overflow (21) is arranged at a position remote from the side wall of the cone portion and the liquid inlet (22) is arranged at a position close to the side wall of the cone portion.
4. The system according to claim 2, wherein the slurry outlet (23) is arranged at the bottom of the cone portion.
5. A system according to any one of claims 1 to 4, characterized in that an agitator (24) is arranged inside the seed reactor (2).
6. A system according to any one of claims 1 to 4, characterized in that the bottom of the seed reactor (2) is provided with a mud level meter.
7. The system according to any one of claims 1 to 4, characterized in that the filter (3) is provided with a back-flushing water inlet and a back-flushing water return;
the back-flushing water inlet is communicated with the water outlet of the raw slurry buffer tank (1), and the back-flushing water return port is communicated with the liquid inlet (22) of the seed crystal reactor.
8. The system of any one of claims 1-4, further comprising a differential pressure gauge;
the differential pressure gauge is arranged outside the filter (3).
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| CN201921068918.4U CN210505922U (en) | 2019-07-09 | 2019-07-09 | System for inhibiting calcium salt scaling by external crystal seed method |
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| CN201921068918.4U CN210505922U (en) | 2019-07-09 | 2019-07-09 | System for inhibiting calcium salt scaling by external crystal seed method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204127A (en) * | 2019-07-09 | 2019-09-06 | 北京能为科技股份有限公司 | A kind of outside crystal seed method inhibits the system and its orientation scaling method of calcium salt scale |
| CN114956274A (en) * | 2022-06-13 | 2022-08-30 | 西安交通大学 | Integrated reactor for treating circulating sewage of power plant by electrochemical descaling-nuclear crystal granulation coupling process and removing method thereof |
-
2019
- 2019-07-09 CN CN201921068918.4U patent/CN210505922U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204127A (en) * | 2019-07-09 | 2019-09-06 | 北京能为科技股份有限公司 | A kind of outside crystal seed method inhibits the system and its orientation scaling method of calcium salt scale |
| CN114956274A (en) * | 2022-06-13 | 2022-08-30 | 西安交通大学 | Integrated reactor for treating circulating sewage of power plant by electrochemical descaling-nuclear crystal granulation coupling process and removing method thereof |
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