RU133526U1 - WATER TREATMENT INSTALLATION OF HEAT ELECTRIC CENTER - Google Patents

Abstract

A water treatment plant for a thermal electric power plant, comprising a series of water pre-treatment units, a water softener, a reverse osmosis unit, and a deaerator connected to a high-pressure steam boiler, and a chemically purified water treatment unit, while the water pre-treatment unit contains series-connected clarifiers with feed water and sludge discharge lines, a coagulated water tank, a mechanical filter with a wash water discharge line and a wash solution tank a washing solution supply line to a clarifier, a mechanical filter washing water removal line is connected to a washing solution tank, a water softening unit contains a Na-cation filter connected in series to a washing solution tank by means of a recovery solution withdrawal line, and a softened water tank with a softened water removal line the reverse osmosis unit contains a reverse osmosis unit with concentrate and permeate drainage lines, the softened water drainage line is connected to the preparation and chemically purified water, characterized in that an ion exchange unit for deep desalination of water is added therein, comprising a series-connected H-ionization filter and an OH-ionization filter with regeneration water removal lines to the neutralization tank, the permeate removal line of the reverse osmosis unit connected to an H-ionization filter, while the neutralization tank and the concentrate removal line of the reverse osmosis unit are connected to the chemically purified water treatment unit.

Description

The utility model relates to the field of thermal and industrial energy and can be used to provide consumers with chemically purified and chemically demineralized water.

The closest in technical essence and the achieved result to the proposed utility model is a system of ion-exchange chemical treatment and reverse osmosis desalination of water for boilers of thermal power plants according to patent RU No. 23232402, C02F 89/08, 04/20/2008, which contains sequentially connected water pre-treatment unit, unit water softeners with a drainage line for excess Na-cation filter regeneration solution for discharge, reverse osmosis unit with concentrate and permeate drainage lines, chemical preparation unit cleanly treated water for a medium-pressure boiler connected to a softened water tank.

In addition, the system contains an additional installation for concentrating solutions and obtaining demineralized water by thermal desalination on an evaporative installation with lines of concentrate and demineralized water.

The main disadvantage of this system is the low quality of the treated water for feeding high-pressure boilers, due to the lack of deep desalination of water.

The task to which the claimed utility model is directed is to improve the quality of the treated water due to the deep desalination of water.

The technical result is achieved by the fact that in the water treatment plant of the thermal power plant, which contains the water pre-treatment unit, the water softener, the reverse osmosis unit, as well as the deaerator connected to the high-pressure steam boiler, and the installation for the preparation of chemically purified water, the preliminary unit water purification system contains serially connected clarifier with feed water and sludge discharge lines, a coagulated water tank, a mechanical filter with a discharge line of washing water and a tank of washing solutions with a supply line of washing solutions to a clarifier, a mechanical filter washing water outlet line is connected to a washing solution tank, a water softening unit contains a Na-cation filter connected in series to a washing solution tank by means of a recovery solution withdrawal line, and a tank softened water with a line for the removal of softened water, the reverse osmosis unit contains a reverse osmosis unit with lines for the discharge of concentrate and permeate, and the line softened water is connected to a chemically purified water treatment plant, according to the proposed utility model, an ion exchange unit for deep desalination of water is added, containing a H-ionization filter and an OH-ionization filter connected in series with the recovery water drainage lines to the neutralizer tank, the drainage line the permeate of the reverse osmosis unit is connected to the H-ionization filter, while the neutralizer tank and the return line of the concentrate of the reverse osmosis unit are connected to the preparation unit Application of chemically purified water.

The essence of the utility model is illustrated by the drawing, which shows the proposed water treatment plant of the thermal power plant.

The drawing has the following notation:

I - pre-treatment unit (BPO),

II - block softened water (BWW),

III - block reverse osmosis (BOO),

IV - ion exchange block (BIO),

1 - feed water line (IW),

2 - clarifier (OSV),

3 - tank coagulated water (Tank KV),

4 - mechanical filter (M-f),

5 - filter Na-cationization (Na-f),

6 - softened water tank (HC tank),

7 - installation of reverse osmosis (UOO),

8 - filter H-ionization (H-filter),

9 - filter OH-ionization (OH-filter),

10 - deaerator (YES),

11 - steam boiler high pressure (HPC),

12 - line drainage softened water from the tank softened water,

13 - line drain concentrate from the installation of reverse osmosis,

14 - line removal of permeate from the installation of reverse osmosis,

15 is a supply line of deeply desalted water from an OH filter,

16 - deaerated water supply line,

17 - line drainage of regeneration water from the N-filter,

18. - line drainage of regeneration water from the OH-filter,

19 - tank neutralizer (Tank N),

20 - installation for the preparation of chemically purified water,

21 - line drain water from a mechanical filter,

21 - line drainage regeneration solution from the Na-cation filter,

23 - tank washing solutions (Tank PR),

24 - line supply of washing solutions to the clarifier,

25 - line discharge of sludge from the clarifier,

26 is a reagent supply line for adjusting the pH of softened water.

The water treatment plant of the thermal power plant contains serially connected block I of preliminary water purification, block II of water softening, block III of reverse osmosis, and a deaerator 10 connected by a line 16 for supplying deaerated water to a high-pressure steam boiler 11 and an installation 20 for preparing chemically purified water .

Block I of the preliminary water purification contains clarifier 2 connected in series with lines 1 and 25, respectively, of the source water supply and sludge discharge, a coagulated water tank 3, a mechanical filter 4 with a washing water discharge line 21 to the washing solution tank 23 having a washing solution supply line 24 to clarifier 2.

The water softening unit II comprises a series-connected Na-cation filter 5 with a regeneration solution drain line 22 and a softened water tank 6 with a softened water removal line 12. The Na-cation filter 5 is connected to the washing solution tank 23 via a regeneration solution withdrawal line 22. The line 12 for the removal of softened water is connected to the installation 20 for the preparation of chemically purified water

Block III reverse osmosis contains the installation of 7 reverse osmosis with lines 13 and 14, respectively, the discharge of concentrate and permeate.

The proposed water treatment plant of the thermal power plant is characterized in that it has an additional IV ion exchange unit for deep desalination of water, which contains a series-connected filter 8 H-ionization and filter 9 OH-ionization with drainage lines for regeneration water, respectively 17 and 18, into the tank the neutralizer 19. The permeate removal line 14 of the reverse osmosis unit 7 is connected to the H-ionization filter 8. The neutralizer tank 19 and the concentrate removal line 13 of the reverse osmosis unit are connected to the chemically purified water preparation unit 20.

Thus, the water treatment plant of the thermal power plant includes four series-connected units:

1) Block I pre-treatment (BPO), consisting of clarifier 2 (OS), to which a mechanical filter 4 (M-f) is connected through a tank 3 of coagulated water (Tank KV).

2) Block II softened water (BWL), consisting of a Na-cation filter 5, to which a softened water tank 6 is connected (HC Tank).

3) Block III reverse osmosis (BOO), consisting of installation 7 reverse osmosis (UOO) with lines 13 and 14, respectively, the discharge of concentrate and permeate.

4) Block IV of ion exchange for deep desalination of water, containing serially connected filter 8 H-ionization and filter 9 OH-ionization with drainage lines of regeneration water, respectively 17 and 18, into the tank neutralizer 19.

5) The water treatment plant of the thermal power plant operates as follows.

The source water through line 1 is supplied to the pre-treatment unit I (BPO), in the clarifier 2 (WWS) of which the coagulation process and subsequent clarification are carried out in the bulk mechanical filter 4 (M-f), which is installed after the tank 3 of coagulated water (KV tank) . The clarified water after the mechanical filter 4 is supplied to the block II water softener (BWW), in which water passes the filter 5 Na-cationization (Na-f). Softened water from the tank 6 softened water (HC Tank), after adjusting the pH through line 26, is fed into the block III reverse osmosis (BOO). Next, the permeate from the reverse osmosis unit 7 (ROO) through line 14 enters the ion exchange block IV for deep desalination of water in the H-ionization filter 8 and OH-ionization filter 9.

Then, through line 15, deeply demineralized water from the OH-ionization filter 9 enters the deaerator 10 with further supply through line 16 to the high-pressure boiler 11. Regeneration water from the H-ionization filter 8 and OH-ionization filter 9, along lines 17, respectively and 18, enter the neutralizer tank 19.

Part of the softened water from the softened water tank 6 (HC Tank) along line 12, the concentrate from the reverse osmosis unit (UO) along line 13, as well as the regeneration water from the neutralizer tank 19, are supplied to the installation 20 for the preparation of chemically purified water, for example heating system recharge.

Wash water along line 21 and regeneration solution along line 22, respectively, from a mechanical filter 4 (M-f) installed in pre-treatment unit I (BPO), and from No-cation filter 5 (Na-f) installed in block II water softeners (BWW) are sent to the tank 23 of washing solutions (Tank PR) with their further supply to clarifier 2 (WWS) along line 24. During the operation of clarifier 2 (OS), sludge is removed along line 25.

The material balance for the processing steps of the proposed utility model of a water treatment plant for a thermal power plant at Kazan TPP-2 in January 2012 is shown in Table 1.

No. Q, t / h W ₀ Na Schm Hco ₃ SO ₄ Cl _{Nd OH} SO ₂ OK BB CC pH g - equiv / t = mg - equiv / t Source water in Osv 225 4.43 0.35 2,53 2,53 1.77 0.34 0.002 9.79 8.83 1.82 336.4 8.16 Clarified water after MF 235.1 0.4 4.15 2.13 1.96 2.07 0.34 0.273 5,4 four one 289.7 10,4 Na cationic water 223.9 0.1 4.45 2.13 1.96 2.07 0.34 0.273 5,4 four 0 289.7 10,4 Permeate 124.2 0.001 0.26 0.124 0.2 0,03 0.1 0.01 0.1 0.4 0 6 8.98 Concentrate 41.1 0.4 17.3 4.74 7.65 11.8 1,08 0.01 22 16,0 - 1240 9.1 HOW 122,4 - 0,00025 0.0001 - 0 0.0001 0 0.0001 0.0001 - 0.001 7 WAN 96.6 0.23 10,4 - 0.115 9,4 0.77 - 12,2 8.9 - 740 9.2 Note: Source water loss is 1.5%.

Thus, the use of the proposed utility model will improve the quality of the treated water due to the deep desalination of water for steam boilers of thermal power plants.

Claims (1)

A water treatment plant for a thermal electric power plant, comprising a series of water pre-treatment units, a water softener, a reverse osmosis unit, and a deaerator connected to a high-pressure steam boiler, and a chemically purified water treatment unit, while the water pre-treatment unit contains series-connected clarifiers with feed water and sludge discharge lines, a coagulated water tank, a mechanical filter with a wash water discharge line and a wash solution tank a washing solution supply line to a clarifier, a mechanical filter washing water removal line is connected to a washing solution tank, a water softening unit contains a Na-cation filter connected in series to a washing solution tank by means of a recovery solution withdrawal line, and a softened water tank with a softened water removal line the reverse osmosis unit contains a reverse osmosis unit with concentrate and permeate drainage lines, the softened water drainage line is connected to the preparation and chemically purified water, characterized in that an ion exchange unit for deep desalination of water is added therein, comprising a series-connected H-ionization filter and an OH-ionization filter with regeneration water removal lines to the neutralization tank, the permeate removal line of the reverse osmosis unit connected to an H-ionization filter, while the neutralization tank and the concentrate removal line of the reverse osmosis unit are connected to the chemically purified water treatment unit.

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