Fly ash recycling MVR condensate water recycling system and operation method

Abstract

The invention relates to a fly ash recycling MVR condensate water recycling system and an operation method.The fly ash recycling MVR condensate water recycling system comprises an MVR system, the MVR system is provided with a condensate water recycling pipeline, and the condensate water recycling pipeline is provided with a high-temperature condensate water collecting tank, a first-stage filter, a collecting heat exchanger, a second-stage filter and a third-stage filter; the condensate water recycling pipeline is located between the primary filter and the collection heat exchanger and is provided with a primary recycling pipeline connected with a fly ash washing system, and a primary distribution valve is arranged at the joint of the condensate water recycling pipeline and the primary recycling pipeline; a second-stage recycling pipeline connected with the dispensing system is arranged on the condensate water recycling pipeline and located between the second-stage filter and the third-stage filter, a second-stage distribution valve is arranged at the joint of the condensate water recycling pipeline and the second-stage recycling pipeline, and the part, located behind the third-stage filter, of the condensate water recycling pipeline is connected with the pump water sealing system. By adopting the scheme, the invention provides the MVR condensate water recycling system for recycling fly ash and the operation method, which fully utilize water resources and heat.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fly ash treatment, in particular to a fly ash resource MVR condensate water recycling system, and also designs an operation method of the system. BACKGROUND

[0002] Fly ash resource refers to a series of technical means to extract, transform and reuse the valuable components in fly ash, so as to realize the reduction, harmlessness and resource utilization of fly ash, reduce the harm to the environment, and improve the utilization efficiency of resources. Fly ash is mainly derived from waste incineration, coal-fired power generation, metal smelting and other industrial processes.

[0003] MVR (Mechanical Vapor Recompression) system is mainly used to improve the efficiency of evaporation and concentration in the process of fly ash resource, especially suitable for waste water / waste liquid treatment and material drying in fly ash treatment, and realizes energy saving and resource utilization through energy recycling.

[0004] In order to make full use of water resources, the condensate water generated by the MVR system is often directly recycled for fly ash washing. Such treatment method has two disadvantages: ① although the water quality of condensate water meets the washing requirements in general, impurities (pipe rust slag, etc.) will inevitably be mixed in the transmission process. After repeated recycling, the impurities will not only affect the washing effect, but also cause pipe blockage and equipment failure; ② since the amount of condensate water is often greater than the amount required for fly ash washing, part of the condensate water needs to be stored in a tank. This part of the condensate water not only has not been reasonably utilized, but also occupies space and gradually increases, and there is also a problem of heat loss. SUMMARY

[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide a fly ash resource MVR condensate water recycling system which fully utilizes water resources and heat.

[0006] In order to achieve the above object, the present application provides the following technical scheme: comprising MVR system, the MVR system is provided with condensate water recycling pipeline, it is characterized by: the condensate water recycling pipeline is sequentially provided with high-temperature condensate water collection tank, primary filter, collection heat exchanger, secondary filter and tertiary filter along the direction of condensate water transmission, the condensate water recycling pipeline is located between primary filter and collection heat exchanger and is provided with with the primary recycling pipeline of fly ash water washing system, the connecting place of the condensate water recycling pipeline and primary recycling pipeline is provided with the primary distribution valve that switches the communication of primary filter and secondary filter or primary recycling pipeline, the condensate water recycling pipeline is located between secondary filter and tertiary filter and is provided with with the secondary recycling pipeline connected with dispensing system, the connecting place of the condensate water recycling pipeline and secondary recycling pipeline is provided with the secondary distribution valve that switches the communication of secondary filter and tertiary filter or secondary recycling pipeline, the part of the condensate water recycling pipeline behind tertiary filter is connected with pump machine seal water system.

[0007] By adopting the technical scheme, most of the condensate water generated by the MVR system reaches the fly ash washing system through the first filter-first reuse pipeline to wash the fly ash, another part reaches the dispensing system through the first filter-collecting heat exchanger-second filter-second reuse pipeline to configure the medicine required to be configured for the fly ash washing, and the remaining part reaches the pump machine seal water system as the machine seal water through the first filter-collecting heat exchanger-second filter-third filter, and the above system has the following advantages: ① before the condensate water is used to wash the fly ash, the condensate water is filtered through the first filter to filter out the impurities carried by the condensate water in the transmission process, thereby avoiding problems such as reduced washing effect and equipment failure caused by impurities; ② the gradually increasing water quality requirements of the fly ash washing system, the dispensing system and the pump machine seal water system are reasonably utilized, the condensate water meeting the water quality of the fly ash washing is secondarily filtered to obtain the condensate water meeting the water quality of the dispensing, and the condensate water meeting the water quality of the dispensing is thirdly filtered to obtain the condensate water meeting the pump machine seal water requirement, on the one hand, the pipeline structure and the filtering structure are simplified, the reuse efficiency is improved, and the system cost is reduced, and on the other hand, the filtering pressure of the second filter and the third filter is reduced, and the service life is prolonged; ③ the different water supply modes of the fly ash washing system (timed water supply), the dispensing system (water supply after consumption) and the pump machine seal water system (continuous water supply) are reasonably utilized, the water demand of the fly ash washing system is met, a certain amount of condensate water is provided for the dispensing system, and then the pump machine seal water system is continuously supplied with water, so that the reuse system can continuously operate, and the situation that too much water appears in the high-temperature condensate water collection tank is avoided; ④ the high-temperature condensate water collection tank is additionally arranged before the first filter to balance the water demand and the water production fluctuation; ⑤ for the heat contained in the condensate water, on the one hand, the condensate water reaches the fly ash washing system to meet the temperature requirement of the fly ash washing system, and on the other hand, the heat is collected by the collecting heat exchanger and is transferred to other aspects of waste treatment, so that the heat is fully utilized; ⑥ the collecting heat exchanger is arranged before the second filter, on the one hand, the dispensing system and the machine seal water system do not need high heat, and on the other hand, damage of the high temperature to the second filter and the third filter is avoided, and the continuous and stable operation of the second filter and the third filter is ensured.

[0008] The application is further provided with: the intelligent control center remotely controls the first distribution valve and the second distribution valve, and the condensate water reuse pipeline is provided with a water pump remotely controlled by the intelligent control center between the high-temperature condensate water collection tank and the first filter.

[0009] By adopting the technical scheme, the intelligent control center is added, the electric control parts of the recycling system are conveniently managed uniformly, the cooperation of the electric control parts is better, linkage with other systems is facilitated, the flow direction of the condensed water of the condensed water recycling pipeline can be adjusted, in addition, the water pump is arranged at the overlapping part of various condensed water flow directions, i.e. between the high-temperature condensed water collecting tank and the primary filter, and the single water pump can meet the water flow force, thereby simplifying the system structure and reducing the system cost.

[0010] The application is further provided that: the secondary recycling pipeline is provided with a dispensing preparation tank, the dispensing preparation tank is provided with a liquid level sensor connected with the intelligent control center and used for detecting the highest water level and the lowest water level, and the dispensing valve at the outlet of the dispensing preparation tank is remotely controlled by the intelligent control center.

[0011] By adopting the technical scheme, the dispensing preparation tank is used for storing the condensed water for dispensing, when the liquid level sensor detects that the liquid level is lower than the lowest water level and the water supply period of the fly ash water washing system, the condensed water is supplemented to the dispensing preparation tank to the highest water level, and intelligent water supplement of the dispensing system is realized.

[0012] The application is further provided that: the primary recycling pipeline is provided with a flow sensor connected with the intelligent control center.

[0013] By adopting the technical scheme, since the flow of the primary recycling pipeline fluctuates, the flow sensor is added, the total amount of water supplement is conveniently controlled, the intelligent control center can control the primary distribution valve to cut off the primary recycling pipeline in advance when the required water supplement amount is about to be reached, intelligent water supplement of the fly ash water washing system is realized, and the waste of the condensed water is reduced.

[0014] The application is further provided that: the outlet of the high-temperature condensed water collecting tank is provided with an emergency stop valve remotely controlled by the intelligent control center, the primary recycling pipeline, the secondary recycling pipeline and the condensed water recycling pipeline are provided with water quality sensor groups electrically connected with the intelligent control center after the tertiary filter, each water quality sensor group comprises a temperature sensor, a PH sensor and an electric conductivity sensor, and the intelligent control center is provided with an alarm module.

[0015] By adopting the technical scheme, when the intelligent control center detects the abnormal water quality through any water quality sensor group, the intelligent control center quickly controls the emergency stop valve to cut off the water outlet of the high-temperature condensed water collecting tank, so as to avoid that the too low water quality affects the normal operation of the systems, at the same time, the intelligent control center informs the staff to accurately go to the water quality abnormal point for maintenance through the alarm module, the maintenance time is shortened, and the stable operation of the system is ensured.

[0016] The application is further provided with a preheating heat exchanger in the boiler system, and a medium pipeline for circulating flow of heat exchange medium is arranged between the preheating heat exchanger and the collecting heat exchanger.

[0017] By adopting the above technical scheme, the garbage treatment plant is provided with the boiler system and the fly ash resource system, the heat of the condensed water is collected by the collecting heat exchanger, and the heat is transmitted to the preheating heat exchanger of the boiler system through the heat exchange medium, so that the normal temperature water in the boiler system is preheated, the heat is reasonably utilized, and the heat loss is reduced.

[0018] The application is further provided with the first filter being a backwashing filter.

[0019] By adopting the above technical scheme, the condensed water filtered by the backwashing filter not only meets the water quality requirement of the fly ash water washing system, but also has the pressure difference or timing triggered backwashing function, so that the manual maintenance is reduced, and the continuous and stable operation of the system is ensured.

[0020] The application is further provided with the second filter being a bag filter.

[0021] By adopting the above technical scheme, the bag filter not only meets the water quality requirement of the dispensing system, but also has the advantages of economy, efficient operation and maintenance, reliable filtration, flexible adaptation and the like.

[0022] The application is further provided with the third filter being a reverse osmosis device.

[0023] By adopting the above technical scheme, the reverse osmosis device not only meets the water quality requirement of the pump machine sealing water system, but also has the excellent desalination capacity, low energy consumption characteristics and system integration intelligence.

[0024] The application further provides an operation method of the fly ash resource MVR condensed water recycling system.

[0025] The condensed water of the MVR system flows out of the MVR system and is collected into the high-temperature condensed water collecting tank, at this time, the intelligent control center controls the emergency stop valve to be in an open state and the water pump to be in a starting state, the water pump guides the condensed water to flow to the first filter, and the condensed water reaches the first distribution valve after being filtered by the first filter.

[0026] If it is in the fly ash water washing period at this time, the intelligent control center controls the first distribution valve to connect the first filter and the first recycling pipeline, the condensed water reaches the fly ash water washing system through the first recycling pipeline and is used for fly ash water washing, when the intelligent control center detects that the total amount of the condensed water entering the fly ash water washing system this time is close to the set total amount through the flow sensor, the intelligent control center controls the first distribution valve to cut off the first filter and the first recycling pipeline and connect the first filter and the second filter, and the above steps are repeated in the next fly ash water washing period.

[0027] c The condensed water continues to flow to the secondary filter, and after heat exchange through the collection heat exchanger, the heat carried is transmitted to the preheating heat exchanger through the heat exchange medium in the medium pipeline to preheat the normal temperature water in the boiler. The condensed water continues to flow, and after filtration through the secondary filter, reaches the secondary distribution valve;

[0028] d When the liquid level of the dispensing preparation tank is lower than the minimum water level and the non-fly ash water washing system is in the water supply period, the intelligent control center detects the liquid level through the liquid level sensor, and the intelligent control center controls the secondary distribution valve to connect the secondary filter and the secondary recycling pipeline. The condensed water reaches the dispensing preparation tank and is collected in the dispensing preparation tank. When the intelligent control center detects that the liquid level of the dispensing preparation tank exceeds the maximum water level through the liquid level sensor, the intelligent control center controls the secondary distribution valve to cut off the secondary filter and the secondary recycling pipeline and connect the tertiary filter. The above steps are repeated when the next condensed water is replenished. The condensed water in the dispensing preparation tank is intermittently opened according to the needs of the dispensing system to supplement the condensed water to the dispensing system for configuring the required medicine for fly ash water washing;

[0029] e The condensed water continues to flow to the tertiary filter, and after filtration through the tertiary filter, the machine seal water is continuously provided to the pump machine seal water system;

[0030] f When the intelligent control center detects that the water quality is abnormal through any one of the water quality sensor groups, the intelligent control center quickly controls the emergency stop valve to cut off the high-temperature condensed water collection tank outlet, stops the water pump from running, and at the same time, the intelligent control center notifies the staff through the alarm module to go to the water quality abnormal point for maintenance.

[0031] By adopting the above technical scheme, all the condensed water and the heat carried by the condensed water can be effectively recycled, the resource utilization rate is maximized, it meets the current environmental protection trend, and the intelligent control center is combined to realize the intelligentization of the whole system, so that the stable and efficient operation of the system is ensured and resource waste is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The principle block diagram of the embodiment is described. DETAILED DESCRIPTION

[0033] The technical scheme of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.

[0034] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] As Figure 1The application discloses a fly ash resource MVR condensate water recycling system, which comprises an MVR system 1, wherein the MVR system 1 is provided with a condensate water recycling pipeline 2, the condensate water recycling pipeline 2 is sequentially provided with a high-temperature condensate water collecting tank 3, a first filter 4, a collecting heat exchanger 5, a second filter 6 and a third filter 7 along a condensate water transmission direction, a first recycling pipeline 9 of a fly ash water washing system 8 is arranged between the first filter 4 and the collecting heat exchanger 5 of the condensate water recycling pipeline 2, a first distribution valve 10 for switching and connecting the first filter 4 and the second filter 6 or the first recycling pipeline 9 is arranged at the connection position of the condensate water recycling pipeline 2 and the first recycling pipeline 9, a second recycling pipeline 12 connected with a dispensing system 11 is arranged between the second filter 6 and the third filter 7 of the condensate water recycling pipeline 2, a second distribution valve 13 for switching and connecting the second filter 6 and the third filter 7 or the second recycling pipeline 12 is arranged at the connection position of the condensate water recycling pipeline 2 and the second recycling pipeline 12, and the part of the condensate water recycling pipeline 2 behind the third filter 7 is connected with a pump machine sealing water system 14.⑤ Regarding the heat contained in the condensate, on the one hand, it reaches the fly ash washing system 8 with the condensate, meeting the temperature requirements of the fly ash washing system 8; on the other hand, it is collected by the heat exchanger 5 and transferred to other aspects of waste treatment, making full use of the heat; ⑥ The heat exchanger 5 is set before the secondary filter 6. On the one hand, the dosing system 11 and the mechanical seal water system do not require excessive heat; on the other hand, it avoids damage to the secondary filter 6 and the tertiary filter 7 caused by high temperature, ensuring the continuous and stable operation of the secondary filter 6 and the tertiary filter 7.

[0036] It also includes an intelligent control center, which is composed of computers and connects to each electrical control component via wired / wireless means. The intelligent control center remotely controls the primary distribution valve 10 and the secondary distribution valve 13. A water pump 15, which is remotely controlled by the intelligent control center, is installed in the condensate reuse pipeline 2 between the high-temperature condensate collection tank 3 and the primary filter 4. The addition of the intelligent control center facilitates unified management of the electrical control components of the reuse system, improves the cooperation of each electrical control component, facilitates linkage with other systems, and can also adjust the condensate flow direction of the condensate reuse pipeline 2. In addition, the water pump 15 is set in the overlapping part of various condensate flow directions, that is, between the high-temperature condensate collection tank 3 and the primary filter 4. A single water pump 15 can meet the water flow dynamics, simplifying the system structure and reducing the system cost.

[0037] The secondary reuse pipeline 12 is equipped with a preparation tank 16 for dispensing medicines. The preparation tank 16 is equipped with a level sensor 17 connected to the intelligent control center and used to detect the highest and lowest water levels. The outlet of the preparation tank 16 is equipped with a dispensing valve 18 that is remotely controlled by the intelligent control center. The preparation tank 16 is used to store condensate for dispensing medicines. When the level sensor 17 detects that the level is lower than the lowest water level and it is not during the water supply period of the fly ash washing system 8, condensate is added to the preparation tank 16 to the highest water level, so as to realize the intelligent water replenishment of the dispensing system 11.

[0038] The primary reuse pipeline 9 is equipped with a flow sensor 19 connected to the intelligent control center. Since the flow rate of the primary reuse pipeline 9 fluctuates, the flow sensor 19 is added to facilitate the control of the total amount of water replenishment. When the required amount of water replenishment is about to be reached, the intelligent control center can control the primary distribution valve 10 to cut off the primary reuse pipeline 9 in advance, so as to realize the intelligent water replenishment of the fly ash washing system 8 and reduce the waste of condensate.

[0039] The outlet of the high-temperature condensate water collecting tank 3 is provided with an emergency stop valve 20 remotely controlled by the intelligent control center, and the first-stage recycling pipeline 9, the second-stage recycling pipeline 12 and the condensate water recycling pipeline 2 are respectively provided with a water quality sensor group 21 electrically connected with the intelligent control center after the third-stage filter 7. Each water quality sensor group 21 comprises a temperature sensor, a PH sensor and an electric conductivity sensor. The intelligent control center is provided with an alarm module. When the intelligent control center detects an abnormal water quality through any water quality sensor group 21, the intelligent control center quickly controls the emergency stop valve 20 to cut off the water outlet of the high-temperature condensate water collecting tank 3, so as to avoid that the low water quality affects the normal operation of the systems. At the same time, the intelligent control center informs the staff to accurately go to the abnormal water quality point for maintenance through the alarm module, so as to shorten the maintenance time and ensure the stable operation of the system. The alarm module generally adopts a buzzer to prompt the occurrence of the abnormality, and informs the abnormal water quality point through a loudspeaker and a display.

[0040] The preheating heat exchanger 23 of the boiler system 22 is further included, and the medium pipeline 24 for the circulation flow of the heat exchange medium is arranged between the preheating heat exchanger 23 and the collecting heat exchanger 5. The garbage treatment plant is provided with the boiler system 22 and the fly ash resource system. The heat of the condensate water is collected by the collecting heat exchanger 5, and is transmitted to the preheating heat exchanger 23 of the boiler system 22 through the heat exchange medium, so as to preheat the normal-temperature water in the boiler system 22, reasonably utilize the heat and reduce the heat loss.

[0041] The first-stage filter 4 is a backwashing filter. The condensate water filtered by the backwashing filter not only meets the water quality requirement of the fly ash water washing system 8, but also has the differential pressure or timing triggered backwashing function, so as to reduce the manual maintenance and ensure the continuous and stable operation of the system.

[0042] The second-stage filter 6 is a bag filter. The bag filter not only meets the water quality requirement of the dispensing system 11, but also has the advantages of economy, efficient operation and maintenance, reliable filtration and flexible adaptation.

[0043] The third-stage filter 7 is a reverse osmosis device. The reverse osmosis device not only meets the water quality requirement of the pump sealing water system 14, but also has the excellent desalination capacity, low energy consumption characteristics and system integration intelligence.

[0044] The operation method of the above system is briefly described as follows:

[0045] The condensate water of the MVR system flows out from the MVR system and is collected to the high-temperature condensate water collecting tank 3. At this time, the intelligent control center controls the emergency stop valve 20 to be in the open state and the water pump 15 to be in the starting state. The water pump 15 guides the condensate water to flow to the first-stage filter 4. The condensate water reaches the first-stage distribution valve 10 after being filtered by the first-stage filter 4.

[0046] If the time is in the fly ash water washing period, the intelligent control center controls the first distribution valve 10 to connect the first filter 4 with the first reuse pipeline 9, and the condensed water reaches the fly ash water washing system 8 through the first reuse pipeline 9 and is used for fly ash water washing. When the intelligent control center detects that the total amount of the condensed water entering the fly ash water washing system 8 this time is close to the set total amount (there can be a small amount of error) through the flow sensor 19, the intelligent control center controls the first distribution valve 10 to cut off the first filter 4 from the first reuse pipeline 9 and connect the first filter 4 with the second filter 6, and waits for the next fly ash water washing period to repeat the above steps.

[0047] At this time, the first filter 4 is connected with the second filter 6, and the condensed water continues to flow to the second filter 6 and exchanges heat in the collection heat exchanger 5. The heat carried by the condensed water is transmitted to the preheating heat exchanger 23 through the heat exchange medium in the medium pipeline 24, and the normal temperature water in the boiler is preheated. The condensed water continues to flow, filters through the second filter 6, and reaches the second distribution valve 13.

[0048] If the intelligent control center detects that the liquid level of the dosing preparation tank 16 is lower than the minimum water level and it is not the water supply period of the fly ash water washing system 8 through the liquid level sensor 17, the intelligent control center controls the second distribution valve 13 to connect the second filter 6 with the second reuse pipeline 12, and the condensed water reaches the dosing preparation tank 16 through the second reuse pipeline 12 and is collected in the dosing preparation tank 16. When the intelligent control center detects that the liquid level of the dosing preparation tank 16 exceeds the maximum water level through the liquid level sensor 17, the intelligent control center controls the second distribution valve 13 to cut off the second filter 6 from the second reuse pipeline 12 and connect the second filter 6 with the third filter 7, and waits for the next condensed water supplement to repeat the above steps. The condensed water in the dosing preparation tank 16 is intermittently opened to the dosing valve 18 according to the needs of the dosing system, and the condensed water is supplemented to the dosing system 11 for configuring the medicine required for configuring fly ash water washing.

[0049] At this time, the second filter 6 is connected with the third filter 7, and the condensed water continues to flow to the third filter 7. After filtering through the third filter 7, the condensed water continues to provide the pump seal water system 14 with seal water.

[0050] When the intelligent control center detects that the water quality is abnormal through any one of the water quality sensor groups 21, the intelligent control center quickly controls the emergency stop valve 20 to cut off the water outlet of the high-temperature condensed water collection tank 3 and stop the water pump from running. At the same time, the intelligent control center notifies the staff to go to the water quality abnormal point for maintenance through the alarm module.

[0051] In summary, the use of this set of reuse system can effectively reuse all condensed water and the heat carried by the condensed water, so that the resource utilization rate is the highest, which meets the current environmental protection trend, and realizes the intelligentization of the whole system with the intelligent control center, so as to ensure the stable, efficient operation of the system and reduce resource waste.

[0052] In addition, the fly ash water washing system, the pharmaceutical system, and the pump seal water system each have a water supplement device to supplement water when the supply of condensed water is insufficient.

Claims

1. A fly ash resource recovery MVR condensate reuse system, comprising an MVR system, wherein the MVR system is equipped with condensate reuse pipelines, characterized in that: The condensate reuse pipeline is sequentially equipped with a high-temperature condensate collection tank, a primary filter, a collection heat exchanger, a secondary filter, and a tertiary filter along the condensate transmission direction. A primary reuse pipeline connected to the fly ash washing system is located between the primary filter and the collection heat exchanger. A primary distribution valve is installed at the connection between the condensate reuse pipeline and the primary reuse pipeline to switch between the primary filter and the secondary filter or the primary reuse pipeline. A secondary reuse pipeline connected to the dosing system is located between the secondary filter and the tertiary filter. A secondary distribution valve is installed at the connection between the condensate reuse pipeline and the secondary reuse pipeline to switch between the secondary filter and the tertiary filter or the secondary reuse pipeline. The portion of the condensate reuse pipeline downstream of the tertiary filter is connected to the pump sealing water system.

2. The fly ash resource recovery MVR condensate reuse system according to claim 1, characterized in that: It also includes an intelligent control center, which remotely controls the primary distribution valve and the secondary distribution valve. The condensate reuse pipeline is located between the high-temperature condensate collection tank and the primary filter and is equipped with a water pump remotely controlled by the intelligent control center.

3. The fly ash resource recovery MVR condensate reuse system according to claim 2, characterized in that: The secondary reuse pipeline is equipped with a preparation tank for dispensing chemicals. The preparation tank is equipped with a level sensor that is connected to the intelligent control center and is used to detect the highest and lowest water levels. The outlet of the preparation tank is equipped with a dispensing valve that is remotely controlled by the intelligent control center.

4. The fly ash resource recovery MVR condensate reuse system according to claim 3, characterized in that: The primary reuse pipeline is equipped with a flow sensor connected to the intelligent control center.

5. The fly ash resource recovery MVR condensate reuse system according to claim 4, characterized in that: The outlet of the high-temperature condensate collection tank is equipped with an emergency stop valve that is remotely controlled by the intelligent control center. The primary reuse pipeline, the secondary reuse pipeline, and the condensate reuse pipeline are each equipped with a water quality sensor group that is electrically connected to the intelligent control center after the tertiary filter. Each water quality sensor group includes a temperature sensor, a pH sensor, and a conductivity sensor. The intelligent control center is equipped with an alarm module.

6. The fly ash resource recovery MVR condensate reuse system according to claim 5, characterized in that: It also includes a preheating heat exchanger located in the boiler system, wherein a medium pipeline for circulating the heat exchange medium is provided between the preheating heat exchanger and the collecting heat exchanger.

7. The fly ash resource recovery MVR condensate reuse system according to claim 1, characterized in that: The primary filter is a backwash filter.

8. The fly ash resource recovery MVR condensate reuse system according to claim 1, characterized in that: The secondary filter is a bag filter.

9. The fly ash resource recovery MVR condensate reuse system according to claim 1, characterized in that: The aforementioned three-stage filter is a reverse osmosis device.

10. The operating method of the fly ash resource recovery MVR condensate reuse system as described in claim 6, characterized in that: The condensate from the MVR system flows out of the MVR system and is collected in the high-temperature condensate collection tank. At this time, the intelligent control center controls the emergency stop valve to be open and the water pump to be started. The water pump guides the condensate to flow to the primary filter. After being filtered by the primary filter, the condensate reaches the primary distribution valve. b. If it is during the fly ash washing period, the intelligent control center controls the primary distribution valve to connect the primary filter with the primary reuse pipeline. The condensate flows through the primary reuse pipeline to the fly ash washing system and is used for fly ash washing. When the intelligent control center detects through the flow sensor that the total amount of condensate flowing into the fly ash washing system this time is close to the set total amount, the intelligent control center controls the primary distribution valve to disconnect the primary filter from the primary reuse pipeline and connect it to the secondary filter. The above steps are repeated during the next fly ash washing period. c. The condensate continues to flow to the secondary filter, and after passing through the heat exchanger for heat exchange, the heat carried is transferred to the preheating heat exchanger through the heat exchange medium in the medium pipeline to preheat the room temperature water in the boiler. The condensate continues to flow, and after being filtered by the secondary filter, it reaches the secondary distribution valve. When the intelligent control center detects that the liquid level in the preparation tank is below the minimum water level and it is not during the period when the fly ash washing system is supplying water, the intelligent control center controls the secondary distribution valve to connect the secondary filter with the secondary reuse pipeline. The condensate reaches the preparation tank through the secondary reuse pipeline and is collected in the preparation tank. When the intelligent control center detects that the liquid level in the preparation tank exceeds the maximum water level, the intelligent control center controls the secondary distribution valve to disconnect the secondary filter from the secondary reuse pipeline and connect it to the tertiary filter. The above steps are repeated when the condensate is replenished next time. The condensate in the preparation tank is intermittently opened by the dosing valve according to the needs of the dosing system to replenish the dosing system for the preparation of the medicines required for fly ash washing. The condensate continues to flow to the three-stage filter, and after being filtered by the three-stage filter, it continuously supplies mechanical seal water to the pump sealing water system. When the intelligent control center detects an abnormal water quality through any water quality sensor group, it quickly controls the emergency stop valve to cut off the water supply from the high-temperature condensate collection tank and stop the water pump. At the same time, the intelligent control center notifies staff to go to the abnormal water quality point for inspection through the alarm module.

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