CN113105027B

CN113105027B - Precision processing device and method for ultra-supercritical direct air cooling unit

Info

Publication number: CN113105027B
Application number: CN202110504855.8A
Authority: CN
Inventors: 王熙俊; 张赞; 李志成; 吴锋; 杨其德; 吴华成; 张洪江; 底广辉; 胡远翔
Original assignee: Shaanxi Deyuan Fugu Energy Co ltd; State Grid Corp of China SGCC; North China Electric Power Research Institute Co Ltd
Current assignee: Shaanxi Deyuan Fugu Energy Co ltd; State Grid Corp of China SGCC; North China Electric Power Research Institute Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-11-04
Anticipated expiration: 2041-05-10
Also published as: CN113105027A

Abstract

The invention provides a precision treatment device and a method for an ultra-supercritical direct air cooling unit. The device comprises: at least 2 powder resin covered filter units, at least 2 high speed mixed bed units; each powder resin covering filter is connected in parallel, and a filter water inlet main pipe isolation valve and a filter water outlet main pipe isolation valve are respectively arranged at two ends of a main pipeline connected in parallel; each high-speed mixing bed is connected in parallel, and a mixing bed water inlet main pipe isolation valve and a mixing bed water outlet main pipe isolation valve are respectively arranged at two ends of a main pipeline connected in parallel; the filter outlet main pipe isolation valve is communicated with the mixed bed inlet main pipe isolation valve through a pipeline. The powder resin covered filter can realize flexible adjustment of the operating condition of the filter by spreading a film to adjust the proportion of resin powder and fiber powder, and the high-speed mixing bed has an excellent deep desalting function; the method not only overcomes the problem of high precision treatment of the condensed water in summer of the direct air cooling unit, but also meets the requirement of the ultra-supercritical unit on high quality of water vapor.

Description

Precision processing device and method for ultra-supercritical direct air cooling unit

Technical Field

The invention belongs to the technical field of condensed water treatment of air cooling units in power plants, and particularly relates to a precision treatment device and method for an ultra-supercritical direct air cooling unit.

Background

According to the chemical design specification requirements of DL/T5068 power plants, all condensed water should be finely treated for supercritical and above parameter steam turbine units or subcritical and below steam turbine units supplied with gas by a once-through boiler. Aiming at an ultra-supercritical once-through boiler, the design of fixed arrangement and continuous arrangement of the boiler is different from a drum boiler, all feed water of a unit is evaporated to be changed into steam after the once-through boiler is converted into dry operation, the whole system does not have the possibility of pollution discharge at all, and simultaneously the requirement of the ultra-supercritical unit on high quality of water and steam is ensured. Therefore, condensate polishing is the only and most important water vapor quality replacement and buffer process. However, in most water source shortage areas such as north China and northwest China, the application of the condensate direct air cooling technology is more and more common, the temperature of the condensate entering the exhaust device from the outlet of the air cooling island is higher, and especially during the back pressure operation period of a unit in summer, the temperature of the condensate often exceeds 70 ℃, which brings great challenges to the fine processing technology and control. The fine treatment process of the conventional wet cooling unit under the condition that the temperature of the condensed water is not more than 45 ℃ can not be applied certainly, and various problems of short periodic water production amount, low water vapor quality parameter and the like also occur after the conventional fine treatment process of the air cooling unit runs for years.

The existing running unit has a condensate fine treatment process for covering a filter by using powder resin, but the single powder resin filter has weak desalting capacity, short film laying period and high running pressure, and meanwhile, the water quality of the water outlet of the single powder resin filter far meets the requirement aiming at the water vapor quality with high quality and high parameters required by an ultra-supercritical unit. In the prior art, a condensate polishing process adopting a pre-filter and a high-speed mixed bed in a matching manner is also available, however, although the process meets the deep desalting function, the flexible adjustment capability of the pre-filter is not enough, and particularly, in a unit debugging stage and a unit production short period, the water quality of a system is poor, sewage interception is required in a short time, the iron content is qualified, and the defects that the pre-filter cannot adjust the operation condition are in a list. In the prior art, a condensate polishing process (publication number CN 200943044Y) using a powder resin covered filter and a high-speed mixed bed in a matching manner is available, and although the scheme generally describes an operation control idea of a powder resin covered filter and a high-speed mixed bed in a matching manner, a specific valve control process is lacked, for example: the design of optimizing a series of valves and devices such as a water inlet and outlet isolation main valve is lacked, and the condensate fine treatment of the ultra-supercritical direct air cooling unit cannot be realized.

Disclosure of Invention

Based on the problems in the prior art, the invention aims to provide a condensate fine treatment device suitable for an ultra-supercritical direct air-cooling unit, and also aims to provide a condensate fine treatment method for the ultra-supercritical direct air-cooling unit by using the device, so that the stable and efficient operation of the fine treatment device is ensured, and the high-quality and high-parameter water vapor quality is continuously provided for the unit.

The purpose of the invention is realized by the following technical means:

in one aspect, the present invention provides a precision processing apparatus for an ultra supercritical direct air cooling unit, the apparatus comprising:

at least 2 powder resin covered filter units, at least 2 high speed mixed bed units;

each powder resin covering filter unit comprises 1 powder resin covering filter, each powder resin covering filter is connected in parallel, and a filter water inlet main pipe isolation valve and a filter water outlet main pipe isolation valve are respectively arranged at two ends of a main pipeline which is connected in parallel; each high-speed mixing bed unit comprises 1 high-speed mixing bed, each high-speed mixing bed is connected in parallel, and a mixing bed water inlet main pipe isolation valve and a mixing bed water outlet main pipe isolation valve are respectively arranged at two ends of a main pipeline connected in parallel; and the filter water outlet main pipe isolation valve is communicated with the mixed bed water inlet main pipe isolation valve through a pipeline.

The precision treatment device of the ultra-supercritical direct air cooling unit disclosed by the invention is compatible with the advantages of a powder resin covered filter and a high-speed mixed bed, the powder resin covered filter can realize flexible adjustment of the operating condition of the filter by adjusting the ratio of resin powder and fiber powder through film laying, and the high-speed mixed bed has an excellent deep desalting function. The device not only overcomes the problem of high precision treatment of the condensed water in summer of the direct air cooling unit, but also meets the requirement of the ultra-supercritical unit on high quality of water vapor.

In the precision treatment device of the ultra-supercritical direct air cooling unit, the powder resin covered filter unit is provided with a filter water inlet main pipe isolation valve and a filter water outlet main pipe isolation valve, and the high-speed mixed bed unit is provided with a mixed bed water inlet main pipe isolation valve and a mixed bed water outlet main pipe isolation valve. The design can ensure that when the condensate header pipe protects a fixed value to act (the condensate water is over-temperature, over-pressure and low-pressure), after the bypass valve is fully opened, the filter, the water inlet header pipe isolation valve and the water outlet header pipe isolation valve of the mixing bed are closed rapidly by program control, all the filters and the high-speed mixing bed which are in operation are directly cut off, and the safety of the filter, the mixing bed tank body, the filter element and the resin (especially in the over-temperature process, the tolerance temperature of the resin cannot be over 70 ℃) is ensured. The four isolation valves are not arranged in the conventional precision processing design in the field, each filter and the mixed bed need to be quitted to operate singly during protection action, the response time is slow, and the safe and efficient operation of the filters and the mixed bed is influenced for a long time.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, the filter water inlet main pipe isolation valve is communicated with the filter water outlet main pipe isolation valve through a pipeline, and a filter bypass valve is arranged on the communicated pipeline; the mixed bed water inlet main pipe isolation valve and the mixed bed water outlet main pipe isolation valve are communicated through a pipeline, and a mixed bed bypass valve is arranged on the communicated pipeline.

In the finishing device of the ultra supercritical direct air cooling unit of the present invention, preferably, each powder resin covered filter is provided with a filter water inlet valve, a filter water outlet valve, a filter pressure increasing valve, a filter pressure reducing valve, a filter air inlet valve, a filter exhaust valve, a filter blowdown valve and a filter holding pump;

the filter water inlet valve and the filter air inlet valve are arranged at the top of the powder resin covered filter, the filter pressure rising valve and the filter water inlet valve are arranged in parallel, the filter water outlet valve and the filter blowdown valve are arranged at the bottom of the powder resin covered filter, and the filter retaining pump is respectively communicated with the filter water inlet valve and two ends of the filter water outlet valve; the filter blowdown valve, the filter pressure relief valve and the filter exhaust valve are communicated with the outside; and the filter air inlet valve is communicated with a pipeline from an external compressed air tank.

In the precision treatment device of the ultra-supercritical direct air cooling unit, the powder resin covered filter is provided with the filter maintaining pump, so that the interlocking of the filter maintaining pump and the water outlet flow is realized, and when the water outlet flow is more than 360t/h, the filter maintaining pump is interlocked and stopped; when the water outlet flow is less than 240t/h, the filter keeps the pump to be locked and started, so that the filter can keep the pump to operate to protect the membrane and prevent the membrane from falling off when the water outlet flow is low due to the change of the load of the unit. In addition, the provision of a filter holding pump can add back-up programming. In the operation process of a common powder resin covering filter, only the operation and shutdown program control is carried out; the invention adds the standby program control (namely, the pump is kept without stopping the filter), so that the filter is firstly put into standby under the condition that the filter needs to be withdrawn from operation in emergency but does not lose efficacy, and the exposure film is put into operation again or stopped in sequence according to the situation, thereby providing possibility for the multi-working-condition operation of the filter.

In the precision processing device of the ultra-supercritical direct air cooling unit, the powder resin covering filter is provided with the filter pressure release valve, so that the tank body is decompressed before film laying is started, the pressure is less than 0.1MPa, and the safe and stable operation of equipment is ensured. In the general membrane laying process of the filter, a pressure release valve is not arranged, and a pressure release step is not arranged, slurry preparation is directly started, in the actual operation process, the interval between an exposed membrane and a laid membrane is possibly long, and a valve leaks slightly, so that the pressure of a tank body is slowly increased to be more than 0.6 MPa. Directly starting with slurry preparation, the high pressure in the tank body can impact the sheeting low pressure system, causing equipment damage (such pressure impact damage has already occurred during actual operation).

In the fine processing device of the ultra-supercritical direct air cooling unit, each high-speed mixed bed is preferably provided with a mixed bed water inlet valve, a mixed bed water outlet valve, a mixed bed pressure increasing valve and a mixed bed exhaust valve;

the mixed bed water inlet valve is arranged at the top of the high-speed mixed bed, the mixed bed pressure rising valve and the mixed bed water inlet valve are arranged in parallel, the mixed bed water outlet valve is arranged at the bottom of the high-speed mixed bed, and the mixed bed exhaust valve is communicated with the outside.

In the finishing device of the ultra supercritical direct air cooling unit according to the present invention, it is preferable that the number of the powder resin coated filter units is 3, and the number of the high-speed mixed bed units is 3.

In the precision treatment device of the ultra supercritical direct air cooling unit, preferably, the high-speed mixed bed unit is further provided with a mixed bed recirculation pump for realizing the circulation of the resin in each high-speed mixed bed, and each high-speed mixed bed recirculation pump is respectively arranged.

In the finishing device of the ultra supercritical direct air cooling unit according to the present invention, preferably, the powder resin covered filter unit further comprises a mixing tank and a membrane laying tank; the bottom of the mixing box is communicated with the bottom of the film spreading box through a pipeline, and the bottom of the mixing box is communicated to the top of the mixing box through a pipeline in a recycling manner; the film laying box is circularly communicated with the powder resin covering filter through a pipeline.

In the precision treatment device of the ultra-supercritical direct air cooling unit, the external film paving device of the powder resin covered filter can flexibly realize the precision treatment process aiming at different condensed water qualities and flexibly adjust the paving modulus and the film paving working condition, and specifically comprises the following steps: in the membrane laying program control process, in a short period of debugging and commissioning of a unit, the quality of condensed water is poor, the content of particulate matters and iron in water is high, and the fine treatment mainly comprises filtration and sewage interception; when the unit operates stably for 1 year, the water vapor quality is good, the iron and silicon contents are very low, and the fine treatment should be mainly based on desalination. Therefore, aiming at the operation characteristics of the 660MW ultra-supercritical direct air cooling unit, the invention increases the fiber powder amount and strengthens the performance of the filter in the debugging period of the unit, and provides the weight of the resin powder and the fiber powder as 1:1 (total 100kg on a dry weight basis) and then coating; slightly reducing the fiber powder amount in a short period of unit production, and mixing resin powder and fiber powder 6:4 (total 100kg on a dry weight basis); after the unit is put into production for one year, the resin powder amount is increased, and the fine treatment at this stage mainly takes deep desalination as the main part, and resin powder and fiber powder are 8:2 (total 100kg on a dry weight basis). By flexibly adjusting the film laying amount and the working condition, the filter can exert the optimal performance in different operation stages of the unit, and the condensate water quality is ensured to be fast qualified and the high quality water vapor quality is stably maintained.

In the precision treatment device of the ultra-supercritical direct air cooling unit, a membrane paving injection pump and a control valve are preferably arranged on a pipeline which communicates the bottom of the mixing box and the bottom of the membrane paving box.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, a stirrer is arranged in the mixing box, and the top of the mixing box is provided with an inlet externally connected with a desalted water tank and an inlet externally connected with an automatic resin powder adding system, and is respectively provided with a control valve.

In the precision treatment device of the ultra-supercritical direct air cooling unit, the mixing box is an automatic resin adding system, the resin powder and the fiber powder in the mixing box are automatically added, and the stirrer is arranged in the mixing box, so that the resin powder and the fiber powder in the mixing box can be uniformly mixed. Need not to adopt modes such as artifical toppling over, manual stirring, avoid hard wasting time and the cat ladder increases the safety risk of ascending a height. In addition, the inlet of the desalting water tank is arranged at the top of the mixing tank and is positioned at the inlet of the condensate and supplement water pump of the steam turbine room, and the high liquid level of the condensate and supplement water tank automatically flows to the mixing tank for supplementing water in real time, so that the efficient, continuous and stable water supplement of the mixing tank in the film laying process is realized; the conventional desalination water replenishing pipe is mostly arranged at the outlet of a membrane laying backflow pipe or a backwashing water pump; the water level of the mixing tank is constant in the film laying circulation process when the mixing tank is placed at the film laying return pipe, and whether the film laying injection pump finishes conveying the resin powder cannot be judged; and the pipeline pressure building influence on the stable operation of the pump due to the small diameter of the water replenishing pipe of the mixing box and the high outlet force of the backwash water pump when the backwash water pump is placed at the outlet of the backwash water pump.

In the finishing device of the ultra supercritical direct air cooling unit according to the present invention, preferably, a film-coating pump and a film-coating valve are provided on a pipeline connecting the bottom of the film-coating tank and the bottom of the powder resin-coated filter.

In the precision treatment device of the ultra supercritical direct air cooling unit, preferably, the top of the membrane laying box and the top of the powder resin covered filter are respectively and externally connected with a backwashing water pump and are respectively provided with a control valve; and the control valve at the top of the film laying box is communicated with the control valve at the top of the powder resin covered filter through a pipeline.

In the precision treatment device of the ultra-supercritical direct air cooling unit, based on the actual operation consideration of the device, backwashing and membrane paving can not be carried out simultaneously, so that a water inlet pipeline of a backwashing water pump and a membrane paving circulation backflow pipeline are creatively provided to be shared, namely: the backwashing water inlet pipeline and the membrane paving circulating water return pipeline of the filter share a pipeline at the bottom of the filter, and the backwashing and membrane paving circulation of the filter can be simultaneously and smoothly carried out by controlling control valves at the top of the filter, the bottom of the filter and the top of the membrane paving box, so that the design is simpler and the cost is saved; the conventional design in the field is that two paths are divided from a main pipe, and a backwashing water inlet valve and a membrane paving water return valve are installed to ensure that the backwashing and the membrane paving of the filter are circularly and independently carried out.

In the finishing device of the ultra supercritical direct air cooling unit, preferably, an overflow pipe is arranged at the top of the film laying box, and the height of the overflow pipe is higher than that of the powder resin covering filter.

In the precision treatment device of the ultra-supercritical direct air cooling unit, the overflow pipe of the membrane paving box is used as the excess water quantity which overflows in the membrane paving circulation process and enters the filter along with the resin powder fiber powder, the height of the conventional overflow pipe of the membrane paving box is mostly equal to the top of the membrane paving box, and the height of the membrane paving box is far lower than the top of the filter, so that the phenomenon that the water level of the filter overflows and is reduced in the circulation process is caused, the membrane paving effect is influenced, and the tank body of the filter is not full of water in the operation process, so that the boosting is unsuccessful; the invention raises the height of the overflow pipe of the film paving box to be higher than the top height of the filter, ensures that the water level of the filter does not drop and is always in a full water state in the film paving circulation process, and ensures that the subsequent filter is put into operation smoothly.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, the high-speed mixed bed unit further comprises a regeneration unit; the regeneration unit comprises a separation tower, a positive tower and a negative tower;

the high-speed mixing bed, the separation tower, the positive tower and the negative tower are respectively provided with a grease inlet valve and a grease outlet valve; and the resin inlet and the resin outlet of the high-speed mixed bed, the separation tower, the positive tower and the negative tower are realized through resin conveying pipelines, and the cyclic regeneration of the resin is realized.

In the ultra supercritical direct air cooling unit fine processing device of the present invention, preferably, the resin delivery pipeline is provided with branch pipelines, and each branch pipeline is respectively provided with a resin output valve of the high speed mixing bed of each unit, and the resin output valves are respectively used for controlling and delivering resin to the high speed mixing bed of the corresponding unit.

In the precision treatment device of the ultra-supercritical direct air cooling unit, the distance of the resin output valve of the high-speed mixed bed of each unit is preferably less than 10cm.

In the precision treatment device of the ultra-supercritical direct air cooling unit, a regeneration unit is shared by a plurality of units, branch pipelines are arranged on a resin conveying pipeline, each branch pipeline is respectively provided with a resin output valve of a high-speed mixing bed of each unit and respectively goes to the units #1, #2, #3 and the like, resin conveying pneumatic valves of the units #1, #2, #3 and the like are arranged on a horizontal pipeline in a conventional partial process, and the distances between the two valves and a branch port tee joint are generally 70-80 cm, so that the resin residue of a pipeline before the resin conveying pneumatic valve of the other unit is carried out when the resin is conveyed to one unit. Based on practical operation experience, the invention creatively provides that the resin conveying pneumatic valves of the units #1, #2, #3 and the like are required to be arranged at the vertical section, and the distance between the valves and the branch tee is shortened to about 10cm, so that the resin is basically prevented from remaining in front of the valves, and the resin conveying efficiency and quality are improved.

In the precision processing device of the ultra-supercritical direct air cooling unit, preferably, the grease inlet valve and the grease outlet valve of the high-speed mixing bed are in circulating communication, and on a pipeline in circulating communication, one end close to the grease inlet valve of the high-speed mixing bed is provided with a resin input main valve, and one end close to the grease outlet valve of the high-speed mixing bed is provided with a resin output main valve.

In the precision processing device of the ultra-supercritical direct air cooling unit, a pipeline sharing resin input and resin output is creatively provided according to the actual operation condition, a mixed bed resin input main valve and a mixed bed resin output main valve are added at the mixed bed end, and the switching of the resin input and the resin output is controlled through the switches of the two valves. Thus, the process is simplified, and the material cost is reduced. In the conventional refinement process in the art, a resin input pipeline and a resin output pipeline are respectively designed, so that although resin input and resin output are independently performed, the limitations of designing the food and increasing the material cost are inevitable.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, the high-speed mixed bed is provided with a mixed bed air inlet valve and a mixed bed air outlet valve; the separation tower is provided with a separation tower air inlet valve and a separation tower exhaust valve; the male tower is provided with a male tower air inlet valve and a male tower exhaust valve; the negative tower is provided with a negative tower air inlet valve and a negative tower exhaust valve;

the mixed bed air inlet valve, the separating tower air inlet valve, the male tower air inlet valve and the female tower air inlet valve are respectively communicated with a pipeline from an external compressed air tank;

the mixed bed exhaust valve, the separation tower exhaust valve, the male tower exhaust valve and the female tower exhaust valve are communicated to the outside through pipelines respectively.

In the finishing device of the ultra supercritical direct air cooling unit, preferably, the separation tower, the negative tower and the positive tower are respectively provided with a separation tower air inlet valve, a negative tower air inlet valve and a positive tower air inlet valve; the separating tower air inlet valve, the negative tower air inlet valve and the positive tower air inlet valve are respectively externally connected with a Roots blower.

In the fine processing device of the ultra supercritical direct air cooling unit, preferably, the high-speed mixing bed is provided with a mixing bed upper flushing valve and a mixing bed lower flushing valve; the mixed bed upper flushing valve and the mixed bed lower flushing valve are communicated in a circulating mode, are respectively externally connected with a regeneration water pump through pipelines, and a flushing water main valve is arranged on the pipeline communicated with the regeneration water pump.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, the separation tower is provided with a separation tower upper water inlet valve, a separation tower upper drain valve, a separation tower lower drain valve, a separation tower backwashing water inlet valve and a separation tower high-speed backwashing valve;

the upper part drain valve of the separation tower and the lower part drain valve of the separation tower are respectively communicated to the outside through pipelines;

a water inlet valve at the upper part of the separation tower, a backwashing water inlet valve of the separation tower and a high-speed backwashing valve of the separation tower are externally connected with a regeneration water pump respectively through pipelines; and the water inlet valve for backwashing of the separation tower is circularly communicated with the high-speed backwashing valve of the separation tower.

In the fine processing device of the ultra supercritical direct air cooling unit, the separation tower is preferably provided with a separation tower water inlet regulating valve which is externally connected with a regeneration water pump through a pipeline.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, the negative tower is provided with a water inlet valve at the upper part of the negative tower, a water inlet valve at the lower part of the negative tower, a water drain valve at the middle part of the negative tower and a water drain valve at the lower part of the negative tower;

the water inlet valve at the upper part of the negative tower and the water inlet valve at the lower part of the negative tower are respectively externally connected with a regeneration water pump through pipelines;

and the drain valve at the lower part of the negative tower and the drain valve at the middle part of the negative tower are respectively communicated to the outside through pipelines.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, a pipeline communicated with a drain valve at the lower part of the negative tower is provided with a negative tower sampling electromagnetic valve.

In the precision treatment device of the ultra-supercritical direct air cooling unit, the negative tower preferably further comprises a negative tower alkali inlet valve, and the negative tower alkali inlet valve is externally connected with an alkali metering pump through a pipeline.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, the negative tower further comprises a negative tower alkali dilution water inlet valve, and the negative tower alkali inlet valve is communicated with the negative tower alkali dilution water inlet valve through a pipeline; the negative tower alkali dilution water inlet valve is externally connected with a regeneration water pump through a pipeline.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, the male tower is provided with a male tower upper water inlet valve, a male tower lower water inlet valve, a male tower middle water discharge valve and a male tower lower water discharge valve;

the water inlet valve at the upper part of the male tower and the water inlet valve at the lower part of the male tower are respectively externally connected with a regeneration water pump through pipelines;

and the drain valve at the lower part of the positive tower and the drain valve at the middle part of the positive tower are respectively communicated to the outside through pipelines.

In the precision treatment device of the ultra-supercritical direct air cooling unit, preferably, a pipeline communicated with a drain valve at the lower part of the positive tower is provided with a positive tower sampling electromagnetic valve.

In the fine processing device of the ultra supercritical direct air cooling unit, the positive tower preferably further comprises a positive tower acid inlet valve, and the positive tower acid inlet valve is externally connected with an acid metering pump through a pipeline.

In the fine processing device of the ultra-supercritical direct air cooling unit, preferably, the positive tower further comprises a positive tower acid dilution water inlet valve, and the positive tower acid inlet valve is communicated with the positive tower acid dilution water inlet valve through a pipeline; the cation tower acid dilution water inlet valve is externally connected with a regeneration water pump through a pipeline.

On the other hand, the invention also provides a condensate fine treatment method of the ultra-supercritical direct air cooling unit, which adopts the device to carry out a fine treatment process and comprises the following steps:

condensed water generated by the ultra-supercritical once-through boiler enters at least 2 powder resin covered filters which are connected in parallel through a filter water inlet main pipe isolation valve for filtration treatment;

and (3) the condensed water after filtering treatment is converged to a filter outlet header isolating valve, and enters at least 2 high-speed mixed beds connected in parallel through a pipeline communicated with the filter outlet pipe isolating valve and the mixed bed inlet header isolating valve to be subjected to mixed bed resin fine treatment, so that the condensed water after fine treatment is finally obtained.

In the method for finely treating the condensed water in the ultra-supercritical direct air cooling unit, preferably, the pressure difference between the inlet and the outlet of the powder resin covered filter is controlled to be less than 0.1MPa by pressure relief before the powder resin covered filter is put into operation.

In the above method for finely treating condensed water in an ultra supercritical direct air cooling unit, preferably, the filter holding pump is interlocked with the flow rate of the effluent water during the operation of the powder resin covered filter, and when the flow rate is greater than 360t/h, the filter holding pump is stopped in an interlocking manner; when the flow rate is less than 240t/h, the filter keeps the pump interlock started.

In the above method for refining condensed water in the ultra supercritical direct air cooling unit, the resin in the powdered resin covered filter is preferably used in a proportion by an exposure film and a film laying process.

In the condensate polishing method of the ultra-supercritical direct air cooling unit, preferably, in the debugging period of the unit, the resin powder and the fiber powder are subjected to film paving according to the weight ratio of 1; in a short period of production of the unit, the resin powder and the fiber powder are spread into a film according to the weight ratio of 6; after the unit is put into production for one year, the resin powder and the fiber powder are spread into a film according to the weight ratio of 8.

In the method for finely processing the condensed water in the ultra-supercritical direct air cooling unit, preferably, the tank body pressure of the mixing tank and the membrane paving tank is controlled to be less than 0.1MPa by pressure relief before the aeration membrane and the membrane paving tank are put into operation.

In the above method for refining condensed water in the ultra supercritical direct air cooling unit, preferably, the step of filling the mixed bed with water is added during the commissioning of the high-speed mixed bed.

According to the condensate fine treatment method of the ultra-supercritical direct air cooling unit, the mixed bed is fully filled with water 5 steps before the high-speed mixed bed is put into operation and program control, the tank body is in a full water state when the mixed bed is put into operation and pressurized every time, and the mixed bed is guaranteed to operate safely, stably and efficiently. However, in the general high-speed mixed bed operation process in the field, no water-full step sequence exists, and in the actual operation, the situation that the tank body is not full of water due to the small leakage of the valve in the mixed bed placing process is found, and in the operation process, the tank body is damaged due to the fact that the pressure of the tank body is not full of water and the pressure is increased is often caused.

In the above method for refining condensed water in the ultra-supercritical direct air cooling unit, preferably, after the high-speed mixed bed resin is conveyed and before the step of filling the mixed bed with water, a step of adding a mixed bed to stand is further included.

According to the condensate fine treatment method of the ultra-supercritical direct air cooling unit, after the step 5 of the cation tower full water step in the resin input program control process is finished, the regenerated water pump is immediately stopped to increase the mixed bed standing step, so that the resin in the mixed bed is guaranteed to be settled, and the mixed bed full water step is carried out after the standing time is up, so that the problem of resin running out is solved through optimized adjustment, and the operation efficiency is improved. In the field, the mixed bed resin input process is generally finished after the resin is conveyed, a pipeline is flushed and the mixed bed is fed with water until the mixed bed is full of water and the liquid level switch is operated; however, during the operation process, the resin in the mixed bed is disturbed, the resin and water are in a chaotic state when the step is carried out, when the mixed bed is full of water, the resin can run out from a top exhaust pipeline, although the running-out amount is not large, the resin amount of the mixed bed is insufficient in the long-term past, and the periodic water production and the efficient operation of the mixed bed are influenced.

In the above method for refining condensed water in the ultra-supercritical direct air cooling unit, preferably, the refining method further includes a process of separating and regenerating resin.

In the above method for refining condensed water in the ultra supercritical direct air cooling unit, preferably, during the resin separation process, only the drain valve at the upper part of the separation tower is opened without opening the exhaust valve of the separation tower.

In the method for finely treating the condensed water of the ultra-supercritical direct air cooling unit, the exhaust valve of the separation tower is not opened, and only the drain valve at the upper part of the separation tower is opened, so that the leakage of the resin is avoided. For the problems of sundries and broken resin in discharged water, a mature and stable unit can process the resin cleanly, the problem is not so serious, one of the sundries and the broken resin is good and bad, and only the upper drain valve is opened, so that the safe, stable and efficient operation of resin separation is facilitated. In the field, the step of resin separation and output program control, resin primary separation and resin secondary separation are generally performed by simultaneously opening an exhaust valve (without a screen) of a separation tower and a drain valve (with a screen) at the upper part of the separation tower, so that impurities and broken resin in water at the upper part of a resin layer are backwashed and discharged in the separation process; however, in actual operation, it is found that if the backwash flow rate is once not controlled well, the backwash flow rate is too large, and the negative resin (having a low density) is likely to leak to the upper part of the separation column and to leak out of the vent valve of the separation column.

In addition, the separation tower device of the invention deletes the pulse grease supporting step sequence of the separation tower, and in the process of resin separation and output program control, a grease outlet valve of the separation tower is generally opened to carry out pulse grease supporting (the valve is opened for 5s every 300 s), so that the aim of supporting the female resin deposited in a resin output pipeline at the bottom of the separation tower in a loosening manner is realized, and the separation of the female resin and the male resin is facilitated. However, in actual operation, in the process of opening the grease outlet valve of the separation tower, if the grease outlet valve of the separation tower is fluctuated by pressure of grease supported by the pipeline, the cation and anion resin in the separation tower falls into the pipeline along with the grease outlet valve of the separation tower, so that the resin of the separation tower is reduced, and the cation and anion resin entering the pipeline enters the cation tower in subsequent steps, so that the cation of the resin in the cation tower is shaded, and the regeneration effect of the cation resin is influenced. This is true based on the operational experience of multiple units. Aiming at the situation, the invention deletes the pulse fat-supporting step sequence of the separation tower, and obtains the separation process for a plurality of times, the pulse fat-supporting process is deleted, the separation of anion and cation resin is not influenced, the separation degree of the resin is qualified, and the separation effect is excellent. Therefore, the control idea is feasible and reliable after practical verification.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may effect this invention by selecting various possible shapes and proportional dimensions as appropriate.

FIG. 1 is a schematic diagram of a precision processing device of an ultra-supercritical direct air cooling unit according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a film-laying device of a powder resin covered filter unit of a fine treatment device of a supercritical direct air cooling unit in the embodiment of the invention;

fig. 3 is a schematic diagram of a regeneration conveying device of a high-speed mixed bed unit of a precision treatment device of a supercritical direct air cooling unit in the embodiment of the invention.

Description of the symbols of the drawings:

1. no. 1 powdered resin covered filter; 2. 2# powdered resin covered filter; 3. 3# powdered resin covered filter; 4. 1# high-speed mixing bed; 5. 2# high-speed mixing bed; 6. 3# high-speed mixing bed; 101. a No. 1 filter water inlet valve; 102. 1# filter outlet valve; 103. 1# filter boost valve; 104. 1# filter exhaust valve; 105. 1# filter relief valve; 106. 1# Filter holding Pump; 119. 1# filter inlet valve; 120. 1# filter blowdown valve; 201. a No. 2 filter inlet valve; 202. 2# filter outlet valve; 203. 2# filter boost valve; 204. 2# filter exhaust valve; 205. 2# filter relief valve; 206. 2# Filter holding Pump; 207. 2# filter intake valve; 208. 2# filter blowdown valve; 301. a 3# filter water inlet valve; 302. 3# filter outlet valve; 303. a #3 filter boost valve; 304. 3# filter exhaust valve; 305. 3# filter relief valve; 306. 3# Filter Hold Pump; 307. 3# filter inlet valve; 308. 3# filter blowdown valve; 401. a No. 1 mixed bed water inlet valve; 402. a No. 1 mixed bed water outlet valve; 403. 1# mixed bed pressure increasing valve; 404. 1# mixed bed exhaust valve; 501. a 2# mixed bed water inlet valve; 502. 2# mixing bed outlet valve; 503. 2# mixed bed pressure increasing valve; 504. 2# mixed bed exhaust valve; 601. a 3# mixed bed water inlet valve; 602. 3# mixing bed outlet valve; 603. 3# mixed bed pressure increasing valve; 604. 3# mixed bed exhaust valve; 701. the filter water inlet main pipe isolation valve; 702. the filter outlet main pipe isolation valve; 801. an isolation valve of a water inlet main pipe of the mixed bed; 802. an isolation valve of a mixed bed water outlet main pipe; 901. a filter bypass valve; 902. a mixed bed bypass valve; 10. a Roots blower; 11. a Roots blower exhaust valve; 12. a regenerative water pump; 13. an alkaline dosing pump; 14. an acid metering pump; 15. a mixed bed recirculation pump; 16. a recirculation pump inlet valve; 107. a film laying box; 108. a mixing box; 109. a stirrer; 110. spreading a membrane injection pump; 111. a membrane laying pump; 112. a control valve; 113. a membrane laying valve; 114. a control valve; 115. a control valve; 116. an overflow pipe; 117. a control valve; 118. a control valve; 41. a separation column; 42. a negative tower; 43. a positive tower; 405. 1# mixing bed grease inlet valve; 406. 1# mixed bed grease outlet valve; 407. washing a valve on the No. 1 mixed bed; 408. 1# mixed bed lower flushing valve; 409. 1# mixed bed resin input main valve; 410. 1# mixed bed resin output main valve; 411. 1# mixed bed air inlet valve; 412. 1# mixed bed exhaust valve; 413. conveying the resin to a No. 1 mixed bed control valve; 414. conveying the resin to a No. 2 mixed bed control valve; 415. a separating tower grease inlet valve; 416. a grease outlet valve of the separation tower; 417. an air inlet valve of the separation tower; 418. a separation tower exhaust valve; 419. a water inlet valve at the upper part of the separation tower; 420. a drain valve at the upper part of the separation tower; 421. a drain valve at the lower part of the separation tower; 422. backwashing a water inlet valve of the separation tower; 423. a high-speed backwash valve of the separation tower; 424. a water inlet regulating valve of the separation tower; 425. a lower water inlet valve of the negative tower; 426. a drain valve at the lower part of the negative tower; 427. a negative tower grease inlet valve; 428. a water inlet valve at the upper part of the negative tower; 429. a negative tower air inlet valve; 430. an air inlet valve of the separation tower; 431. an air inlet valve of the negative tower; 432. an alkali inlet valve of the negative tower; 433. a drain valve at the middle part of the negative tower; 434. a negative tower alkali dilution water inlet valve; 435. a negative tower exhaust valve; 436. an air inlet valve of the positive tower; 437. a lower water inlet valve of the male tower; 438. a drain valve at the lower part of the positive tower; 439. a water inlet valve at the upper part of the male tower; 440. a male tower air intake valve; 441. a male tower vent valve; 442. a male tower grease inlet valve; 443. a male tower grease outlet valve; 444. an acid inlet valve of the positive tower; 445. a water discharge valve at the middle part of the positive tower; 446. a yang tower acid dilution water inlet valve; 447. a main flush valve; 448. a negative column grease outlet valve; 449. a negative tower sampling electromagnetic valve; 450. a positive tower sampling electromagnetic valve; 451. a No. 1 mixed bed recirculation valve; 505. a No. 2 mixed bed recirculation valve; 605. 3# mixed bed recirculation valve.

Detailed Description

The technical solutions of the present invention will be described in detail below in order to clearly understand the technical features, objects, and advantages of the present invention, but the present invention should not be construed as limiting the implementable scope of the present invention. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1:

this embodiment provides a super supercritical direct air cooling unit fine processing apparatus, as shown in fig. 1, the apparatus includes:

3 powder resin covered filters and 3 high speed mixed beds. The #1 powdery resin coated filter 1, the #2 powdery resin coated filter 2 and the #3 powdery resin coated filter 3 are connected in parallel with each other; a filter water inlet main pipe isolation valve 701 and a filter water outlet main pipe isolation valve 702 are respectively arranged at two ends of the main pipeline connected in parallel; the No. 1 high-speed mixing bed 4, the No. 2 high-speed mixing bed 5 and the No. 3 high-speed mixing bed 6 are connected in parallel, and a mixing bed water inlet main pipe isolation valve 801 and a mixing bed water outlet main pipe isolation valve 802 are respectively arranged at two ends of a main pipeline connected in parallel; the filter outlet water main isolation valve 702 is communicated with the mixed bed inlet water main isolation valve 801 through a pipeline.

The filter water inlet main pipe isolation valve 701 is communicated with the filter water outlet main pipe isolation valve 702 through a pipeline, and a filter bypass valve 901 is arranged on the communicated pipeline; the mixed bed water inlet main pipe isolation valve 801 and the mixed bed water outlet main pipe isolation valve 802 are communicated through a pipeline, and a mixed bed bypass valve 902 is arranged on the communicated pipeline.

A 1# filter water inlet valve 101, a 1# filter air inlet valve 119, a 1# filter air outlet valve 104 and a 1# filter pressure relief valve 105 are arranged at the top of the 1# powder resin covered filter 1, a 1# filter pressure increasing valve 103 is arranged in parallel with the 1# filter water inlet valve 101, a 1# filter water outlet valve 102 and a 1# filter blowdown valve 120 are arranged at the bottom of the 1# powder resin covered filter 1, and a 1# filter holding pump 106 is respectively communicated with two ends of the 1# filter water inlet valve 101 and the 1# filter water outlet valve 102; the No. 1 filter blowdown valve 120, the No. 1 filter pressure relief valve 105 and the No. 1 filter exhaust valve 104 are communicated with the outside; the #1 filter inlet valve 119 is in communication with a line from an external compressed air tank.

A 2# filter inlet valve 201, a 2# filter inlet valve 207, a 2# filter exhaust valve 204 and a 2# filter relief valve 205 are arranged at the top of the 2# powder resin covered filter 2, a 2# filter pressure increasing valve 203 is arranged in parallel with the 2# filter inlet valve 201, a 2# filter outlet valve 202 and a 2# filter blowdown valve 208 are arranged at the bottom of the 2# powder resin covered filter 2, and a 2# filter holding pump 206 is respectively communicated with two ends of the 2# filter inlet valve 201 and the 2# filter outlet valve 202; the No. 2 filter blowdown valve 208, the No. 2 filter pressure relief valve 205 and the No. 2 filter exhaust valve 204 are communicated with the outside; the #2 filter intake valve 207 communicates with a line from an outside compressed air tank.

A 3# filter water inlet valve 301, a 3# filter air inlet valve 307, a 3# filter air outlet valve 304 and a 3# filter pressure relief valve 305 are arranged at the top of the 3# powder resin covered filter 3, a 3# filter pressure increasing valve 303 is arranged in parallel with the 3# filter water inlet valve 301, a 3# filter water outlet valve 302 and a 3# filter blowdown valve 308 are arranged at the bottom of the 3# powder resin covered filter 3, and a 3# filter holding pump 306 is respectively communicated with two ends of the 3# filter water inlet valve 301 and the 3# filter water outlet valve 302; the 3# filter blowdown valve 308, the 3# filter pressure relief valve 305 and the 3# filter exhaust valve 304 are communicated with the outside; the 3# filter intake valve 307 communicates with a line from an outside compressed air tank.

A1 # mixed bed water inlet valve 401 is arranged at the top of a 1# high-speed mixed bed 4, a 1# mixed bed pressure increasing valve 403 is arranged in parallel with the 1# mixed bed water inlet valve 401, a 1# mixed bed water outlet valve 402 is arranged at the bottom of the 1# high-speed mixed bed 4, and a 1# mixed bed exhaust valve 404 is communicated with the outside.

The 2# mixed bed water inlet valve 501 is arranged at the top of the 2# high-speed mixed bed 5, the 2# mixed bed boosting valve 503 and the 2# mixed bed water inlet valve 501 are arranged in parallel, the 2# mixed bed water outlet valve 502 is arranged at the bottom of the 2# high-speed mixed bed 5, and the 2# mixed bed exhaust valve 504 is communicated with the outside.

The 3# mixed bed water inlet valve 601 is arranged at the top of the 3# high-speed mixed bed 6, the 3# mixed bed boosting valve 603 and the 3# mixed bed water inlet valve 601 are arranged in parallel, the 3# mixed bed water outlet valve 602 is arranged at the bottom of the 3# high-speed mixed bed 6, and the 3# mixed bed exhaust valve 604 is communicated with the outside.

The high-speed mixed bed unit is also provided with a mixed bed recirculation pump 15 and a recirculation pump inlet valve 16 for realizing the circulation of resin in each high-speed mixed bed, and the high-speed mixed bed unit specifically comprises the following components: the bottom of the No. 1 high-speed mixed bed 4 is provided with a No. 1 mixed bed recirculation valve 451, the bottom of the No. 2 high-speed mixed bed 5 is provided with a No. 2 mixed bed recirculation valve 505, and the bottom of the No. 3 high-speed mixed bed 6 is provided with a No. 3 mixed bed recirculation valve 605; which are respectively communicated with a recirculation pump inlet valve 16 and a mixed bed recirculation pump 15 through pipelines and further communicated to the top of each high-speed mixed bed.

The 3 powdered resin covered filters are respectively externally connected with a film spreading device of the powdered resin covered filter unit, as shown in fig. 2, taking the No. 1 powdered resin covered filter as an example, the powder resin covered filter unit comprises a mixing box 108 and a film spreading box 107; the bottom of the mixing box 108 is communicated with the bottom of the film laying box 107 through a pipeline, and the bottom of the mixing box 108 is communicated to the top of the mixing box 108 through a pipeline in a recycling way; the film laying box 107 is circularly communicated with the No. 1 powder resin covering filter 1 through a pipeline; a film-paving injection pump 110 and a control valve 114 are arranged on a pipeline communicated with the bottom of the film-paving tank 107 at the bottom of the mixing tank 108; the mixer 109 is arranged inside the mixing box 108, the top of the mixing box 108 is provided with an inlet externally connected with a demineralized water tank and an inlet externally connected with an automatic resin powder adding system, and the mixing box is respectively provided with a control valve 118 and a control valve 117; a film laying pump 111 and a film laying valve 113 are arranged on a pipeline communicated with the bottom of the No. 1 powdered resin covered filter 1 at the bottom of the film laying box 107; the top of the film laying box 107 and the top of the 1# powder resin covered filter 1 are respectively externally connected with a backwashing water pump and are respectively provided with a control valve 115 and a control valve 112, and the control valves 115 and 112 are communicated through pipelines; the top of the film laying box 107 is provided with an overflow pipe 116, and the height of the overflow pipe 116 is higher than that of the No. 1 powder resin covering filter 1.

As shown in fig. 3, a resin delivery pipeline of the regeneration delivery device is provided with branch pipelines, and each branch pipeline is respectively provided with a resin output valve of each unit high-speed mixed bed, for example: the resin delivery to 1# mixed bed control valve 413 and the resin delivery to 2# mixed bed control valve 414 are used for delivering the resin to the 1# high-speed mixed bed and the 2# high-speed mixed bed of the corresponding units respectively. The connection of the #1 high-speed mixing bed and the regeneration unit is taken as an example and is described as follows:

the regeneration unit includes a separation column 41, a positive column 43, and a negative column 42.

The No. 1 high-speed mixing bed 4 is provided with a No. 1 mixing bed grease inlet valve 405 and a No. 1 mixing bed grease outlet valve 406; the separation column 41 is provided with a separation column fat inlet valve 415 and a separation column fat outlet valve 416; the female column 42 is provided with a female column inlet valve 427 and a female column outlet valve 448; the male tower 43 is provided with a male tower grease inlet valve 442 and a male tower grease outlet valve 443. The method comprises the following steps of realizing resin inlet and resin outlet of the high-speed mixed bed, the separation tower, the positive tower and the negative tower through resin conveying pipelines, and realizing the cyclic regeneration of the resin, and specifically comprises the following steps: the #1 high-speed mixed bed 4, the separation tower 41, the negative tower 42 and the positive tower 43 share one resin conveying pipeline, and the resin conveying pipeline is respectively communicated with a grease inlet valve and a grease outlet valve of each unit through branch pipelines; in a preferred mode, the male column lipid inlet valve 442 is in communication with the separation column 41; wherein, a resin conveying pipeline at one end of the 1# mixed bed resin inlet valve 405 is provided with a 1# mixed bed resin input main valve 409, and a resin conveying pipeline at one end of the 1# mixed bed resin outlet valve 406 is provided with a 1# mixed bed resin output main valve 410.

The 1# high-speed mixed bed 4 is provided with a 1# mixed bed air inlet valve 411 and a 1# mixed bed exhaust valve 412; the separation tower 41 is provided with a separation tower intake valve 417 and a separation tower exhaust valve 418; the male tower 43 is provided with a male tower intake valve 440 and a male tower exhaust valve 441; the female tower 42 is provided with a female tower inlet valve 429 and a female tower outlet valve 435. The 1# mixed bed air inlet valve 411, the separation tower air inlet valve 417, the male tower air inlet valve 440 and the female tower air inlet valve 429 are respectively communicated with a pipeline from an external compressed air tank; the 1# mixed bed exhaust valve 412, the separation tower exhaust valve 418, the male tower exhaust valve 441 and the female tower exhaust valve 435 are respectively communicated to the outside through pipelines.

The separation tower 41, the negative tower 42 and the positive tower 43 are respectively provided with a separation tower air inlet valve 430, a negative tower air inlet valve 431 and a positive tower air inlet valve 436; the separating tower air inlet valve 430, the negative tower air inlet valve 431 and the positive tower air inlet valve 436 are respectively externally connected with a Roots blower 10; the pipeline of the Roots blower 10 is also provided with a branch pipeline, and the branch pipeline is provided with a Roots blower exhaust valve 11.

The No. 1 high-speed mixed bed 4 is provided with a No. 1 mixed bed upper flushing valve 407 and a No. 1 mixed bed lower flushing valve 408; the 1# mixed bed upper flushing valve 407 and the 1# mixed bed lower flushing valve 408 are in circulation communication, are externally connected with the regeneration water pump 12 through a pipeline respectively, and are provided with a flushing water main valve 447 on the pipeline communicated with the regeneration water pump 12.

The separation tower 41 is provided with a separation tower upper water inlet valve 419, a separation tower upper water discharge valve 420, a separation tower lower water discharge valve 421, a separation tower backwashing water inlet valve 422 and a separation tower high-speed backwashing valve 423; a drain valve 420 at the upper part of the separation tower and a drain valve 421 at the lower part of the separation tower are respectively communicated to the outside through pipelines; a water inlet valve 419 at the upper part of the separation tower, a backwash water inlet valve 422 of the separation tower and a high-speed backwash valve 423 of the separation tower are respectively externally connected with a regeneration water pump 12 through pipelines; a separation tower backwashing water inlet valve 422 is circularly communicated with a separation tower high-speed backwashing valve 423; the separation tower 41 is provided with a separation tower inlet water adjusting valve 424, and the separation tower inlet water adjusting valve 424 is externally connected with the regeneration water pump 12 through a pipeline.

The negative tower 42 is provided with a negative tower upper water inlet valve 428, a negative tower lower water inlet valve 425, a negative tower middle water discharge valve 433 and a negative tower lower water discharge valve 426; a water inlet valve 428 at the upper part of the negative tower and a water inlet valve 425 at the lower part of the negative tower are respectively connected with a regeneration water pump 12 externally through pipelines; the drain valve 426 at the lower part of the negative tower and the drain valve 433 at the middle part of the negative tower are respectively communicated to the outside through pipelines; a pipeline communicated with the drain valve 426 at the lower part of the negative tower is provided with a negative tower sampling electromagnetic valve 449; the negative tower 42 also comprises a negative tower alkali inlet valve 432, and the negative tower alkali inlet valve 432 is externally connected with an alkali metering pump 13 through a pipeline; the negative tower 42 further comprises a negative tower alkali dilution water inlet valve 434, and the negative tower alkali inlet valve 432 is communicated with the negative tower alkali dilution water inlet valve 434 through a pipeline; the caustic dilution feed valve 434 of the negative tower is externally connected with the regeneration water pump 12 through a pipeline.

The male tower 43 is provided with a male tower upper water inlet valve 439, a male tower lower water inlet valve 437, a male tower middle drain valve 445 and a male tower lower drain valve 438; the water inlet valve 439 at the upper part of the male tower and the water inlet valve 437 at the lower part of the male tower are respectively externally connected with the regeneration water pump 12 through pipelines; a drain valve 438 at the lower part of the positive tower and a drain valve 445 at the middle part of the positive tower are respectively communicated to the outside through pipelines; a male tower sampling electromagnetic valve 450 is arranged on a pipeline communicated with the drain valve 438 at the lower part of the male tower; the positive tower 43 further comprises a positive tower acid inlet valve 444, and the positive tower acid inlet valve 444 is externally connected with the acid metering pump 14 through a pipeline; the anode tower 43 also comprises an anode tower acid dilution water inlet valve 446, and an anode tower acid inlet valve 444 is communicated with the anode tower acid dilution water inlet valve 446 through a pipeline; the cation column acid dilution feed valve 446 is externally connected with the regeneration water pump 12 through a pipeline.

Example 2:

the embodiment provides a condensate polishing method for an ultra-supercritical direct air-cooling unit, which adopts the condensate polishing device for the ultra-supercritical direct air-cooling unit of embodiment 1, and comprises the following steps:

condensed water generated by the ultra-supercritical once-through boiler enters at least 2 powder resin covered filters which are connected in parallel through a main filter water inlet manifold isolation valve for filtration treatment;

The concrete operation control of each process of the condensate fine treatment method of the ultra-supercritical direct air cooling unit is as follows:

1. the powder resin coated filters were put into service, stand-by and taken out of service in the sequence shown in table 1 below.

Table 1:

note: in the table: "\9679;" indicates an open state and blank indicates a closed state, as in the table below.

2. The powder resin covered filter exposure and film lay-up sequence is shown in table 2 below.

Table 2:

3. the programmed sequence of high-speed mixed-bed operation and shutdown is shown in table 3 below.

Table 3:

4. the programmed sequence of the input and output of the high-speed mixed-bed resin is shown in the following table 4 (taking the #1 unit as an example).

Table 4:

5. the programmed sequence of the input and output of the high-speed mixed-bed resin is shown in the following table 5 (taking the #1 unit as an example).

Table 5:

6. the programmed steps for the regeneration of the anion and cation column resins are shown in Table 6 below.

Table 6:

7. the programmed steps for the regeneration of the anion tower and the cation tower resin are shown in the following table 7 (taking a #1 unit as an example).

Table 7:

8. the programmed sequence of transfer of off-grade resin from the positive column to the separation column is shown in Table 8 below (using the #1 train as an example).

Table 8:

the quality of the water before and after the treatment of the condensed water of the ultra-supercritical direct air cooling unit by adopting the precision treatment device of the ultra-supercritical direct air cooling unit is shown in the following table 9.

Table 9:

as can be seen from the experimental data of table 9: the water quality is obviously improved through the treatment of the condensed water by the ultra-supercritical direct air cooling unit fine treatment device, and the water quality after treatment is far lower than the national standard control standard, so that the requirement of the ultra-supercritical unit on high quality of water vapor is met.

The precision processing device of the ultra-supercritical direct air cooling unit disclosed by the invention is compatible with the advantages of a powder resin covered filter and a high-speed mixing bed, the powder resin covered filter can realize flexible adjustment of the operating condition of the filter by adjusting the ratio of resin powder and fiber powder through film laying, and the high-speed mixing bed has an excellent deep desalting function. The device not only overcomes the problem of high precision treatment of the condensed water in summer of the direct air cooling unit, but also meets the requirement of the ultra-supercritical unit on high quality of water vapor.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a smart processing apparatus of super supercritical direct air cooling unit, the device includes:

each powder resin covering filter unit comprises 1 powder resin covering filter, each powder resin covering filter is connected in parallel, and a filter water inlet main pipe isolation valve and a filter water outlet main pipe isolation valve are respectively arranged at two ends of a main pipeline which is connected in parallel; each high-speed mixing bed unit comprises 1 high-speed mixing bed, each high-speed mixing bed is connected in parallel, and a mixing bed water inlet main pipe isolation valve and a mixing bed water outlet main pipe isolation valve are respectively arranged at two ends of a main pipeline connected in parallel; the filter water outlet main pipe isolation valve is communicated with the mixed bed water inlet main pipe isolation valve through a pipeline;

wherein each powder resin covering filter is provided with a filter water inlet valve, a filter water outlet valve, a filter pressure increasing valve, a filter pressure releasing valve, a filter air inlet valve, a filter exhaust valve, a filter blowdown valve and a filter retaining pump;

the filter water inlet valve and the filter air inlet valve are arranged at the top of the powder resin covered filter, the filter pressure rising valve and the filter water inlet valve are arranged in parallel, the filter water outlet valve and the filter blowdown valve are arranged at the bottom of the powder resin covered filter, and the filter retaining pump is respectively communicated with the filter water inlet valve and two ends of the filter water outlet valve; the filter blowdown valve, the filter pressure relief valve and the filter exhaust valve are communicated with the outside; the filter air inlet valve is communicated with a pipeline from an external compressed air tank.

2. The device of claim 1, wherein the filter inlet manifold isolation valve and the filter outlet manifold isolation valve are communicated through a pipeline, and a filter bypass valve is arranged on the communicated pipeline; the mixed bed water inlet main pipe isolation valve and the mixed bed water outlet main pipe isolation valve are communicated through a pipeline, and a mixed bed bypass valve is arranged on the communicated pipeline.

3. The apparatus of claim 1, wherein each high-speed mixed bed is provided with a mixed bed inlet valve, a mixed bed outlet valve, a mixed bed boost valve and a mixed bed exhaust valve;

4. The apparatus according to claim 1, wherein the number of the powder resin-covered filter units is 3, and the number of the high-speed mixed-bed units is 3.

5. The apparatus according to claim 1 or 4, wherein the high-speed mixed bed unit is further provided with a mixed bed recirculation pump for realizing the circulation of the resin in each high-speed mixed bed, and each high-speed mixed bed recirculation pump is provided separately.

6. The apparatus of claim 1 or 4, wherein the powder resin covered filter unit further comprises a mixing tank, a filming tank; the bottom of the mixing box is communicated with the bottom of the film spreading box through a pipeline, and the bottom of the mixing box is communicated to the top of the mixing box through a pipeline in a recycling mode; the film laying box is circularly communicated with the powder resin covering filter through a pipeline.

7. The device of claim 6, wherein a film-coating injection pump and a control valve are arranged on a pipeline of which the bottom of the mixing tank is communicated with the bottom of the film-coating tank.

8. The apparatus of claim 6, wherein the mixing tank is internally provided with a stirrer, and the top of the mixing tank is provided with an inlet externally connected to a demineralized water tank and an inlet externally connected to an automatic resin powder adding system, and is respectively provided with a control valve.

9. The apparatus according to claim 6, wherein a filming pump and a filming valve are provided on a pipeline on which the bottom of the filming tank communicates with the bottom of the powder resin covered filter.

10. The device according to claim 6, wherein the top of the membrane laying box and the top of the powder resin covered filter are respectively externally connected with a backwashing water pump and are respectively provided with a control valve; and the control valve at the top of the film laying box is communicated with the control valve at the top of the powder resin covered filter through a pipeline.

11. The apparatus of claim 6, wherein the top of the film laying tank is provided with an overflow pipe having a height higher than the top of the powder resin cover filter.

12. The apparatus of claim 1, wherein the high-speed mixed bed unit further comprises a regeneration unit; the regeneration unit comprises a separation tower, a positive tower and a negative tower;

the high-speed mixing bed, the separation tower, the positive tower and the negative tower are respectively provided with a grease inlet valve and a grease outlet valve; and the resin of the high-speed mixed bed, the separation tower, the positive tower and the negative tower is fed and discharged through resin conveying pipelines, and the resin is recycled.

13. An apparatus according to claim 12, wherein the resin delivery pipe is provided with branch pipes, and each branch pipe is provided with a resin output valve of the high-speed mixing bed of each unit, and the resin output valves are respectively used for controlling the delivery of resin to the high-speed mixing bed of the corresponding unit.

14. The device as claimed in claim 12, wherein the grease inlet valve and the grease outlet valve of the high-speed mixing bed are circularly communicated, and a resin input main valve is arranged on a circularly communicated pipeline at one end close to the grease inlet valve of the high-speed mixing bed, and a resin output main valve is arranged at one end close to the grease outlet valve of the high-speed mixing bed.

15. The apparatus of claim 12, wherein the high speed mixed bed is provided with a mixed bed inlet valve and a mixed bed outlet valve; the separation tower is provided with a separation tower air inlet valve and a separation tower exhaust valve; the male tower is provided with a male tower air inlet valve and a male tower air outlet valve; the negative tower is provided with a negative tower air inlet valve and a negative tower exhaust valve;

the mixed bed exhaust valve, the separation tower exhaust valve, the positive tower exhaust valve and the negative tower exhaust valve are respectively communicated to the outside through pipelines.

16. The apparatus of claim 12, wherein the separation column, the female column and the male column are provided with a separation column inlet valve, a female column inlet valve and a male column inlet valve, respectively; the separating tower air inlet valve, the negative tower air inlet valve and the positive tower air inlet valve are respectively externally connected with a Roots blower.

17. The apparatus of claim 1 or 12, wherein the high speed mixed bed is provided with a mixed bed upper flush valve and a mixed bed lower flush valve; the mixed bed upper flushing valve and the mixed bed lower flushing valve are communicated in a circulating mode, are respectively externally connected with a regeneration water pump through pipelines, and a flushing water main valve is arranged on the pipeline communicated with the regeneration water pump.

18. The apparatus of claim 12, wherein the separation column is provided with a separation column upper water inlet valve, a separation column upper drain valve, a separation column lower drain valve, a separation column backwash water inlet valve, and a separation column high speed backwash valve;

a water inlet valve at the upper part of the separation tower, a backwashing water inlet valve of the separation tower and a high-speed backwashing valve of the separation tower are externally connected with a regeneration water pump through pipelines respectively; and the water inlet valve for backwashing of the separation tower is circularly communicated with the high-speed backwashing valve of the separation tower.

19. The apparatus of claim 18, wherein the separation column is provided with a separation column feed water transfer valve that is externally connected to a regeneration water pump through a pipeline.

20. The apparatus of claim 12, wherein the female tower is provided with a female tower upper water inlet valve, a female tower lower water inlet valve, a female tower middle drain valve, and a female tower lower drain valve;

21. The device of claim 20, wherein a negative tower sampling electromagnetic valve is arranged on a pipeline communicated with the lower water discharge valve of the negative tower.

22. The apparatus of claim 20, wherein the negative column further comprises a negative column caustic feed valve that is externally plumbed to a caustic metering pump.

23. The apparatus of claim 22 wherein said female tower further comprises a female tower caustic dilution feed valve, said female tower caustic dilution feed valve in communication with said female tower caustic dilution feed valve via a conduit; the negative tower alkali dilution water inlet valve is externally connected with a regeneration water pump through a pipeline.

24. The apparatus of claim 12, wherein the male tower is provided with a male tower upper water inlet valve, a male tower lower water inlet valve, a male tower mid-section drain valve, and a male tower lower drain valve;

25. The apparatus as claimed in claim 24, wherein the pipeline communicated with the water discharge valve at the lower part of the male tower is provided with a male tower sampling electromagnetic valve.

26. The apparatus of claim 24, wherein the positive column further comprises a positive column acid inlet valve that is externally connected to an acid metering pump through a pipe.

27. A device according to claim 26, wherein the male tower further comprises a male tower acid dilution water inlet valve, the male tower acid inlet valve being in communication with the male tower acid dilution water inlet valve via a conduit; the cation tower acid dilution water inlet valve is externally connected with a regeneration water pump through a pipeline.

28. A condensate water fine treatment method of an ultra-supercritical direct air cooling unit, which adopts the device of any one of claims 1 to 27 to carry out fine treatment process, and comprises the following steps:

the condensed water after filtering treatment is converged to a filter water outlet main pipe isolation valve, and enters at least 2 high-speed mixed beds connected in parallel through a pipeline communicated with a mixed bed water inlet main pipe isolation valve through a filter water outlet pipe isolation valve to carry out mixed bed resin fine treatment, and finally the condensed water after fine treatment is obtained;

wherein, in the operation process of the powder resin covered filter, the filter keeps the pump interlocked with the water outlet flow, and when the flow is more than 360t/h, the filter keeps the pump interlocked to stop; when the flow rate is less than 240t/h, the filter keeps the pump interlock started.

29. The polishing process of claim 28, wherein the pressure differential across the powdered resin coated filter is controlled by venting < 0.1MPa prior to commissioning.

30. The finishing process of claim 28, wherein the proportion of the resin in the powdered resin covered filter is applied by a film-exposing, film-laying process.

31. The fine processing method according to claim 30, wherein in the unit commissioning period, the resin powder and the fiber powder are spread in a weight ratio of 1; in a short period of putting the unit into production, resin powder and fiber powder are spread into a film according to the weight ratio of 6; after the unit is put into production for one year, resin powder and fiber powder are subjected to film laying according to the weight ratio of 8.

32. The fine processing method according to claim 30, wherein the tank body pressure of the mixing tank and the film laying tank is controlled to be less than 0.1MPa by pressure relief before the film exposure and the film laying are put into operation.

33. The polishing process of claim 28, wherein the high speed mixed bed is increased to a mixed bed full of water during commissioning.

34. The polishing method according to claim 33, further comprising a step of adding a mixed bed standing step after the high-speed mixed bed resin is conveyed and before the step of filling the mixed bed with water.

35. The polishing process of claim 28, further comprising a resin separation regeneration process.

36. The polishing process according to claim 35, wherein only a drain valve at an upper part of the separation column is opened without opening a vent valve of the separation column during the resin separation.