CN105883971A - Transformation method of power generating unit condensation water treatment system - Google Patents

Abstract

The invention discloses a transformation method of a power generating unit condensation water treatment system. The transformation method includes following steps: (1), replacing a prefilter with a front hydrogen bed, wherein cation resin in the front hydrogen bed is identical with that in a high-speed mixed bed; (2), removing standby anion-cation mixed resin in a cation regeneration tower/storage tower to enable the cation regeneration tower/storage tower to maintain an empty-tower standby state; (3), mounting a resin conveying pipeline on the front hydrogen bed, wherein the resin conveying pipeline is connected with a resin conveying pipeline of a resin regeneration system; (4), retaining a bypass system beside the prefilter to serve as a bypass system of the front hydrogen bed. The transformation method is simple and low in cost, and periodic produced water quantity and water quality of the power generating unit condensation water treatment system are improved greatly.

Description

A modification method of condensate water treatment system of generating set

technical field

The invention belongs to the field of condensed water treatment in power stations, and in particular relates to a modification method for a condensed water treatment system of a generating set.

Background technique

At present, the condensate treatment of supercritical generating units mostly adopts the "pre-filter + high-speed mixed bed" technology, as shown in Figure 1, where the pre-filter uses a pre-filter, and the pre-filter is responsible for removing the condensate Suspended solids and corrosion products (mainly iron oxides), the high-speed mixed bed is responsible for removing salt ions in condensed water. The mixed bed adopts an in vitro regeneration system, mainly based on the "high tower method", including a separation tower, a yin regeneration tower, and a yang regeneration tower/storage tower. A set of yin and yang mixed fat will be placed in the yang regeneration tower/storage tower as a backup.

Due to the current feedwater treatment process adopted by supercritical and above-parameter generator sets is generally oxidative full-volatility treatment and reductive full-volatility treatment, the pH value of feedwater is generally controlled in the range of 9.2 to 9.6, and the ammonia content in condensed water is relatively large, resulting in mixed beds. Periodic water production generally does not exceed 100,000m ³ , and the operation period is generally 5 to 7 days. In the case of dual operation of two 600MW units (7 sets of resins), the mixed bed resin regeneration frequency is about two to three times a week; while in the case of dual operation of two 1000MW units (9 sets of resins), the mixed bed resin Resin regeneration frequency is approximately four to five times per week. Resin regeneration is frequent and the workload is heavy. In case of system failure, the failed mixed-bed resins are often queued for regeneration, or even no spare mixed-beds are available because the resins cannot be regenerated in time. In view of the above situation, some power plants have to prolong the running time of the failed mixed bed, and allow the mixed bed to change from the hydrogen type operation state ^to the ammonium type operation state. The exchange reaction of the exchange reaction is carried out in reverse, not only does not absorb impurity anions such as chloride ions, but also part of the impurity chloride ions originally absorbed will be displaced by the OH ^- ions in the water and return to the water, thereby forming a displacement peak of chloride ions, which is consistent with At the same time, NH ₄ ⁺ ions begin to displace sodium ions, causing a sodium ion displacement peak to appear in the water.

The above reaction can be regarded as the process of using NH ₄ OH solution in water to regenerate the sodium-type and chlorine-type expired resins (RNa, RCl) in the mixed bed resin layer. The regeneration reaction is as follows:

RNa+RCl+NH ₄ OH = RNH ₄ +ROH+Na ⁺ + Cl ^-

To sum up, after the failure of the hydrogen-type mixed bed, if it does not exit in time, but continues to operate and transforms to the ammonium-type mixed bed, the displacement peaks of chloride ions and sodium ions will appear, and a large amount of chloride ions and sodium ions will be released backwards. Sodium ions will cause salt accumulation and corrosion of thermal equipment, and will reduce the quality of effluent water.

Tang Zhouhong disclosed in "Enterprise Technology Development" the transformation of the condensate polishing system of the 600MW unit, starting the filter element by replacing the pre-filter, replacing the pre-filter and high-mix valve mat, and replacing the valve of the fine treatment regeneration system. The regeneration process and process procedures were optimized, and the baffle plate of the water inlet device was repaired and corrected to transform the condensate fine treatment system. After the transformation, the problems of overpressure, leakage, unqualified effluent quality, and low water production volume of the fine treatment device were all solved. , and the hydrogen conductance of high-mixed water drops significantly. This transformation method has little improvement on the water quality and periodic water production of the condensate polishing system.

For the power plants built in the early stage, the condensate water treatment system of the generator set has been completed and put into use. Now, if the condensate water treatment system of the new generator set is redesigned, the cost will be high and the construction period will be long. Therefore, it is very necessary to carry out transformation on the basis of the condensate water treatment system of the generating set to make it conform to the existing process conditions.

Contents of the invention

In view of this, the purpose of the present invention is to provide a modification method for the condensate treatment system of a generating set, which is simple, low in cost, and greatly improves the periodic water production and water quality of the system.

To achieve the above object, the present invention adopts the following technical solutions:

A modification method for a condensate treatment system of a generating set, comprising the following steps:

(1) Replace the pre-filter with a pre-hydrogen bed, and the cation resin in the pre-hydrogen bed is the same as the cation resin in the high-speed mixed bed;

(2) Remove a set of spare yin and yang mixed fat in the yang regeneration tower/storage tower, so that the yang regeneration tower/storage tower remains empty and ready for use;

(3) A resin delivery pipeline is installed on the front hydrogen bed, and the resin delivery pipeline is connected with the resin delivery pipeline of the resin regeneration system;

(4) Keep the bypass system next to the pre-filter as the bypass system of the pre-hydrogen bed.

Preferably, 2 pre-filters are replaced with 2-3 pre-hydrogen beds.

Preferably, replace the 2 pre-filters with 2 pre-hydrogen beds with 1/2 condensed water flow;

Or replace 2 pre-filters with 3 pre-hydrogen beds with 1/3 condensate flow;

Or replace the 2 pre-filters with 2 pre-hydrogen beds with 1/2 condensed water flow each, and keep 1 for backup.

Preferably, the operating flow rate of the pre-hydrogen bed satisfies the superficial flow rate of 100-120 m/h.

Preferably, the cation resin in the pre-hydrogen bed and the high-speed mixed bed is scrubbed with air before the cation regeneration tower/storage tower is regenerated until the drainage of the cation regeneration tower/storage tower is clear.

Preferably, a flow regulating valve is provided on the bypass system to adjust the flow of condensed water in the bypass.

Preferably, the pre-hydrogen bed is a cylindrical ion exchanger or a spherical ion exchanger.

The beneficial effects of the present invention are:

1. The modification of the condensate treatment system of the generating set in the present invention is carried out on the basis of the original "pre-filter + high-speed mixed bed" technical process. After the pre-filter is removed, it is replaced with a pre-hydrogen bed, and Rearrange the resin delivery pipeline and the condensate main pipeline to connect with the pre-hydrogen bed, the overall change is small, the cost is low, and the construction is convenient.

2. Changing the pre-filter to the pre-hydrogen bed not only retains the iron removal function, but more importantly, adds the ability to remove ammonia, and after replacing it with the pre-hydrogen bed, it can ensure that the mixed bed operates at the best Under the pH value of the feed water, in actual production, the water production capacity of the mixed bed can be increased by more than 4 times, and the regeneration frequency of the mixed bed resin can be greatly reduced, while the pre-hydrogen bed only needs to regenerate the cation resin, and the operation steps are simple; and avoid The risk of chlorine ion and sodium ion "displacement peak" in the effluent of the mixed bed is eliminated, the desalination capacity of the mixed bed is improved, the effluent water quality of the mixed bed is effectively guaranteed, and the corrosion, salt accumulation, and condensation of thermal equipment such as steam turbines are reduced. Dirt risk.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. The accompanying drawings in the following description are only the present invention For the embodiment of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Figure 1 is a schematic structural diagram of the condensate treatment system of the generating unit before the transformation;

Figure 2 is a schematic structural diagram of the condensate treatment system of the power unit after transformation;

Fig. 3 is the experimental apparatus diagram of simulation experiment;

Fig. 4 is the relationship diagram between specific conductivity and periodic water production in the simulated experiment;

Fig. 5 is the relational curve of chlorine ion content and specific conductivity in bare mixed bed outlet in simulation experiment;

Figure 6 is the relationship curve between the chloride ion content at the outlet of the rear mixed bed and the specific conductivity in the simulation experiment.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

comparative example

Figure 1 shows the condensate water treatment system of the generator set before transformation, which adopts the "pre-filter + high-speed mixed bed" process, including pre-filter and high-speed mixed bed, and the resin regeneration system includes separation tower, yin regeneration tower and yang regeneration tower/ The storage tower, in which the yang regeneration tower is also a resin storage tower, will place a set of spare yin and yang mixed fat; a bypass system will be set next to the pre-filter, that is, a bypass valve will be set. When the pre-filter has problems and cannot be used, The condensed water flows directly through the bypass system, and the water from the condensed water pump enters the high-speed mixed bed after passing through the pre-filter. The anion and positive resins in the high-speed mixed bed are sent to the resin regeneration system for regeneration through the resin delivery pipeline.

Example 1

Figure 2 is a schematic structural diagram of the modified condensate treatment system of the generating unit. Compared with Figure 1, the modification method in Figure 2 is as follows:

(1) After removing the pre-filter, replace it with a pre-hydrogen bed. The flow rate of the pre-hydrogen bed needs to meet the empty tower flow rate of 100-120m/h, in which the cation resin in the pre-hydrogen bed and the high-speed mixing The cation resin in the bed is exactly the same, because the pre-hydrogen bed and the high-speed mixed bed share a set of resin regeneration system, and the pre-hydrogen bed can use a cylindrical ion exchanger or a spherical ion exchanger;

In addition, depending on the site space conditions, 2 pre-filters can be replaced by 2-3 pre-hydrogen beds, of which 2 pre-filters can be replaced by 2 pre-hydrogen beds with 1/2 condensed water flow ; or replace 2 pre-filters with 3 pre-hydrogen beds with 1/3 condensate flow each; or replace 2 pre-filters with 2 pre-hydrogen beds with 1/2 condensate flow , keep 1 for standby, in this embodiment, replace 2 pre-filters with 2 pre-hydrogen beds with 1/2 flow rate of condensed water.

(2) Remove a set of spare yin and yang mixed grease in the cation regeneration tower/storage tower, so that the cation regeneration tower/storage tower remains empty and ready for use, which can be used to regenerate the cation resin of the pre-hydrogen bed, or use Used to regenerate the mixed bed cation resin transported from the bottom of the separation tower;

(3) Install the resin delivery pipeline on the pre-hydrogen bed, as shown in Figure 2, open a three-way connection between the high-speed mixed bed and the resin regeneration system near the pre-hydrogen bed, and connect the stainless steel pipe to the pre-hydrogen bed The resin delivery pipeline is docked, so that the resin delivery pipeline on the pre-hydrogen bed is connected to the resin delivery pipeline of the resin regeneration system, and the control valve is installed;

(4) The bypass system next to the pre-filter is reserved as the bypass system of the pre-hydrogen bed, and a flow regulating valve can also be set on the bypass system to adjust the bypass condensate flow;

(5) Before the cation resin in the pre-hydrogen bed and high-speed mixed bed is regenerated in the cation regeneration tower/storage tower, Roots blower can be used for air scrubbing until the drainage of the cation regeneration tower/storage tower is clear.

simulation experiment

Taking the condensate treatment system of a single 600MW unit as a template to simulate the resin loading amount and flow rate of the high-speed mixed bed, the designed test device is shown in Figure 3, which includes the condensate treatment system of the power unit before transformation, namely "Pre-filter + naked mixed bed" is similar to the structure in Figure 1, and also includes the modified condensate treatment system of the generating set, namely "pre-hydrogen bed + post-mixed bed", which is similar to the structure in Figure 2. The loading amount of resin is 4L of cation resin in the front hydrogen bed, 7.5L of regenerated and mixed anion and cation mixed resin in the bare mixed bed and post mixed bed (the ratio of cation and anion resin is 1:1).

The test device was installed in the steam turbine workshop of a power plant. The "pre-filter + bare mixed bed" system and the "pre-hydrogen bed + post-mixed bed" system are all connected through stainless steel inner corrugated hoses, pressure reducing valves and condensate pipes. The pressure gauge sampling pipe on the tester is connected softly, and the water from the condensate pump is used as the water inlet; all valves in the test device are made of TP304 stainless steel, and the pipes, sampling valves, flow meters, etc. are made of non-polluting ABS and PVC materials.

The ion exchange column in the test device is made of plexiglass, and the top is equipped with an exhaust valve, which is used to exhaust the ion exchange column when it is full of water; the upper part of the ion exchange column enters the water, and the lower part of the water outlet is equipped with a water collector, and the flow area is not less than The flow area of the inlet pipe.

After the start of the simulation test, the inlet flow rate of the adjusted bare mixed bed and the pre-hydrogen bed are the same, both being 0.8m ³ /h. Sampling through the sampling gate to detect and record parameters such as specific conductivity, cumulative flow, and Cl ^- content of the condensate inlet, bare mixed bed outlet, pre-hydrogen bed outlet, and post-mixed bed outlet; analyze the cumulative water production volume of the mixed bed and the pH of the effluent , specific conductivity, and Cl ^- content changes, see Figure 4, Figure 5 and Figure 6 for details.

Figure 4 is a relationship diagram between specific conductivity and periodic water production. As shown in Figure 4, for the "pre-filter + bare mixed bed" and "pre-hydrogen bed + post-mixed bed" systems: at the entrance of the test device That is, the specific conductivity at the condensate inlet fluctuates between 3.72 and 6.07 μs/cm, and the calculated pH value is between 9.08 and 9.35. The specific conductivity at the outlet of the bare mixed bed is 0.09μs/cm when the water production volume reaches 164.4m ³ , and when the water production volume reaches 172m ³ , the specific conductivity reaches 0.26μs/cm. It appears that the bare mixed bed has begun to leak ammonia at this time. Enter the transition stage from hydrogen form to ammonium form. After that, the specific conductivity of the outlet of the bare mixed bed increased rapidly. When the water production volume reached 223m ³ , the specific conductivity of the outlet and the inlet were basically equal, and the mixed bed entered the ammonium type operation stage.

For the "pre-hydrogen bed + post-mixed bed" system in the simulation test device, since the cation resin loading of the pre-hydrogen bed is about 6% more than that of the bare mixed bed, the water production capacity It should also be slightly more than a bare mixed bed. As shown in Figure 4, the specific conductivity at the outlet of the pre-hydrogen bed is 0.10 μs/cm when the water production volume reaches 172 m ³ , and when the water production volume reaches 183 m ³ , the specific conductivity reaches 0.26 μs/cm. The bed also began to transform to the ammonium type, and compared with the bare mixed bed, its water production capacity is relatively more by about 6% (10m ³ ), which is proportional to the loading capacity of the cation resin. This shows that the condensed water in the mixed bed operation, due to the addition of a large amount of ammonia in the water vapor system, occupies most of the exchange capacity of the cation resin, which makes the cation resin fail prematurely and reduces the utilization rate of the resin. Therefore, the cycle length of the mixed-bed hydrogen type operation depends on the amount of the mixed-bed cation resin. However, since the condensate mixed bed and regeneration equipment of the operating unit have been finalized, this prompts us to adopt a new design idea to increase the proportion of cation resin.

The pre-hydrogen bed and the post-mixed bed operate in series. In the early stage of the operation of the pre-hydrogen bed, its resin absorbs most of the cations in the condensed water, including NH ₄ ⁺ ions, and the effluent contains only a small amount of anion impurities. Compared with the bare mixed bed At the inlet, the pH value of the influent mixed bed is close to neutral, which is extremely beneficial to the desalination reaction of the mixed bed:

RH+ROH+NaCl = RNa+RCl+ _H2O

Because the positive and negative resins are fully mixed in the mixed bed, the H ⁺ and OH ^- generated by the ion exchange reaction are immediately combined into H ₂ O molecules with a very small degree of dissociation, eliminating the effect of counter ions, and the ion exchange reaction is carried out very thoroughly. well protected.

It can be seen from Figure 4 that due to the existence of the pre-hydrogen bed, the post-mixed bed has a water production capacity of 336m ³ when the outlet specific conductivity is 0.10μs/cm, which is more than twice that of the bare mixed bed.

It can be seen that the more cation resin in the pre-hydrogen bed, the greater the water production capacity of the post-mixed bed. If the failed pre-hydrogen bed has a spare bed that can be replaced at any time, the periodic water production capacity of the post-mixed bed can be greatly improved; even if there is no spare pre-hydrogen bed, as long as the failed pre-hydrogen bed cation resin can be conveniently With rapid regeneration, the periodic water production capacity of the rear mixed bed can also be greatly improved. The in vitro regeneration process of the pre-hydrogen bed spent cation resin is very simple, and can be quickly completed in the cation regeneration tower, without the need for complex operations such as separation, regeneration, and fat mixing of anion and cation resins in high towers like mixed bed spent resins. This creates extremely favorable conditions for greatly increasing the periodic water production capacity of the condensate mixed bed.

Figure 5 is the relationship curve between the chlorine ion content at the outlet of the bare mixed bed and the specific conductivity, and Figure 6 is the relationship curve between the chlorine ion content at the outlet of the rear mixed bed and the specific conductivity. Figure 5 and Figure 6 show that: when the specific conductivity of the mixed bed outlet is below 0.10μs/cm, the chloride ion content of the mixed bed outlet basically fluctuates below 1μg/L; when the mixed bed outlet specific conductivity exceeds 0.10μs/cm And began to rise rapidly, the chloride ion content also rose sharply, and finally stabilized to about 5.5μg/L, indicating that as the mixed bed began to transform from hydrogen form to ammonium form (ammonia leakage from the effluent), there was a "displacement of chloride ions". The chlorine ions absorbed by the mixed bed during the hydrogen type operation stage are released into the effluent in large quantities; this is because when the cation resin in the mixed bed begins to fail, it gradually loses its ability to remove ammonia, and the effluent of the mixed bed begins to leak ammonia, and the pH of the effluent The value and specific conductivity also gradually increased. The pH value of water in the resin layer increases, and the content of OH ^- ions increases, so that the exchange reaction of the anion resin is reversed, not only no longer absorbs (or absorbs incompletely), but also some impurity anions such as chloride ions originally absorbed may also be absorbed by the water. The OH ^- ions are displaced and return to the water:

ROH+Cl ^- = RCl+OH ^- (reverse)

The above process can also be regarded as the process of regenerating the resin layer by the NH ₄ OH contained in the condensed water: for the anion resin, the anion resin is regenerated by using the OH ^- ions generated by the dissociation of NH ₄ OH, so that the Cl ^- that the anion resin has absorbed is displaced out; for cationic resins, NH ₄ ⁺ ions displace Na ⁺ , so that Na ⁺ displacement peaks appear in water:

RNH ₄ +Na ⁺ = RNa+NH ₄ ⁺ (reverse)

From the perspective of ion exchange reaction, the reverse of the above reaction is actually the NH ₄ OH in the condensed water regenerates the anion and cation resins, and the displaced Na ⁺ , Cl ^- and other ion impurities are the waste liquid generated during the regeneration process. The amount of displacement is directly related to the content of impurity ions in the resin phase and the amount of impurity ions absorbed by the resin during hydrogen-type operation. After the transformation stage, the mixed bed will completely enter the ammonium type operation stage, and the ion form of the resin in the bed and the content and proportion of impurity ions in the influent have reached a balance, showing that the quality of the effluent water is equal to the quality of the influent water.

The above simulation tests have fully confirmed that in the transition stage of the mixed bed from hydrogen to ammonium, there is not only displacement of sodium ions, but also displacement of chloride ions. Chloride ion is a corrosive anion that can destroy the protective film on the metal surface and easily cause metal point corrosion in the water vapor system of the generator set. In particular, the austenitic steel in the thermal system of the unit is highly sensitive to chloride ions, and is prone to stress corrosion cracking under the combined action of chloride ions and stress.

The transformation method of the present invention replaces the pre-filter with the pre-hydrogen bed, which eliminates the ammonia removal load of the mixed bed in advance, ensures that the post-mixed bed operates under the optimal pH value of the influent, and greatly improves the efficiency of the system. Periodic water production reduces the regeneration frequency of the mixed bed resin significantly, completely eliminates the possibility that the mixed bed is forced to switch to ammonium type operation because the resin is too late to regenerate, and avoids the occurrence of chloride and sodium ion "displacement peaks" in the mixed bed effluent ", which improves the desalination capacity of the mixed bed, effectively guarantees the effluent water quality of the mixed bed, reduces the risk of corrosion, salt accumulation, and scaling of thermal equipment such as steam turbines, and is conducive to the safety, economy, environmental protection, and low cost of power generation units. carbon run.

production test

Apply the modification method of the generating unit condensate treatment system of the present invention to two 600MW units of a certain power plant, and when the generating unit condensate treatment system in Fig. There are 7 sets of resins in total, including one set in each mixed bed and a set of spare resin in the regeneration room. When a single unit is running, the periodic water production capacity of each mixed bed is about 100,000 tons, which can be After running for about 7 days, the regeneration system regenerates a set of spent resin every 3 days on average; when the two units are running at the same time, the regeneration system regenerates a set of spent resin every 1.5 days on average.

However, the condensate water treatment system of the generator set in Fig. 1 is transformed into that shown in Fig. 2, and 2 pre-filters are replaced with 2 pre-hydrogen beds, that is, 2 pre-hydrogen beds and 3 high-speed mixed beds are used. , remove the spare anion and cation mixed fat in the cation regeneration tower/storage tower, and install a resin delivery pipeline on the front hydrogen bed, wherein the resin delivery pipeline is connected with the resin delivery pipeline of the resin regeneration system. After the transformation, since the pre-hydrogen bed has removed most of the ammonia in the condensed water during operation, the high-speed mixed bed basically no longer undertakes the task of removing ammonia. The operating cycle of each pre-hydrogen bed is about 7 days. Only when one pre-hydrogen bed fails and exits the resin for regeneration (regeneration time does not exceed 6 hours), the bypass system needs to be opened to allow the condensed water containing ammonia to enter directly. High speed mixed bed. As a result, the periodic water production capacity of each high-speed mixed bed can theoretically be increased by about 28 times, reaching about 2.8 million tons; the operating cycle can be as long as about 196 days. However, in order to avoid compaction of the resin due to the long running time of the high-speed mixed bed, the operation period of each high-speed mixed bed is generally controlled to be about one month, and the periodic water production is about 430,000 tons, which is more than 4 times higher than before the transformation. When a single unit is running, the regeneration system regenerates a set of high-speed mixed bed failure resin on average every 16 days; when two units are running at the same time, the regeneration system regenerates a set of high-speed mixed bed failure resin on average every 8 days, the regeneration frequency of high-speed mixed bed resin It is equivalent to about 1/5 of that before the transformation.

Finally, it is noted that the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it. Those of ordinary skill in the art may make other modifications or equivalent replacements to the technical solution of the present invention, as long as they do not depart from the spirit and spirit of the technical solution of the present invention. All should be included in the scope of the claims of the present invention.

Claims (7)

1. the remodeling method of a generating set condensate polishing system, it is characterised in that: comprise the following steps:

(1) fore filter replacing with preposition hydrogen bed, the positive resin in described preposition hydrogen bed is identical with the positive resin in high flow rate mixed bed；

(2) a set of standby negative and positive in sun regenerator/storage tower are mixed fat to remove, make sun regenerator/storage tower keep void tower resting state；

(3) installing resin supplying channel on preposition hydrogen bed, described resin supplying channel is connected with the resin supplying channel of resin regeneration system；

(4) bypath system that fore filter is other is retained, as the bypath system of preposition hydrogen bed.

The remodeling method of a kind of generating set condensate polishing system the most according to claim 1, it is characterised in that: 2 fore filters are replaced with 2-3 platform preposition hydrogen bed.

The remodeling method of a kind of generating set condensate polishing system the most according to claim 2, it is characterised in that: 2 fore filters are replaced with the preposition hydrogen bed of 2 each 1/2 condensing water flows；

Or 2 fore filters are replaced with the preposition hydrogen bed of 3 each 1/3 condensing water flows；

Or 2 fore filters are replaced with the preposition hydrogen bed of 2 each 1/2 condensing water flows, stay 1 standby.

The remodeling method of a kind of generating set condensate polishing system the most according to claim 1, it is characterised in that: it is 100～120m/h that the flow velocity of described preposition hydrogen bed operating meets void tower flow velocity.

The remodeling method of a kind of generating set condensate polishing system the most according to claim 1, it is characterized in that: the positive resin in described preposition hydrogen bed and high flow rate mixed bed is before sun regenerator/storage tower regeneration, carry out air bump rinse operation, till sun regenerator/storage tower draining is limpid.

The remodeling method of a kind of generating set condensate polishing system the most according to claim 1, it is characterised in that: flow control valve is set in described bypath system with regulation bypass condensing water flow.

The remodeling method of a kind of generating set condensate polishing system the most according to claim 1, it is characterised in that: described preposition hydrogen bed is cylindrical ion exchanger or spherical ions exchanger.