CN209178076U - A Simple and Economical Circulating Water High Concentration Ratio System - Google Patents

Abstract

The utility model discloses a kind of recirculated water high concentration ratio systems of simple economy, including recirculated water supplement pipeline, cooling tower, nutritional agents dosing system, nitrifier domestication dosing system and recirculated water condenser and subsidiary engine heat-exchange system；Recirculated water supplement pipeline is connected with the water inlet of cooling tower, the bottom of cooling tower is provided with flexible filler, the outlet of nutritional agents dosing system is connected with the entrance of nitrifier domestication dosing system, the outlet of nitrifier domestication dosing system is connected with the entrance of flexible filler, the circulating-pump outlet at cooling tower bottom is connected with the entrance of recirculated water condenser and subsidiary engine heat-exchange system, the outlet of recirculated water condenser and subsidiary engine heat-exchange system is connected with the water return outlet of cooling tower, the system can be improved the concentration rate of recirculated water, structure is simple, it is easy to operate, it is at low cost.

Description

A Simple and Economical Circulating Water High Concentration Ratio System

technical field

The utility model belongs to a circulating water high concentration rate system, in particular to a simple and economical circulating water high concentration rate system.

Background technique

At present, the circulating water condenser and auxiliary heat exchange pipes of most circulating cooling power plants are generally made of 316 or 316L stainless steel, and even the circulating water condensers and auxiliary heat exchange pipes of some power plants are made of 317 or 317L stainless steel. According to "Material Selection of Condenser and Auxiliary Cooler Tubes in Power Plants" (DL/T 712-2010), 316 and 316L stainless steel, the concentration of Cl ^- in the circulating water is controlled to ≤1000mg/L; 317 and 317L stainless steel, the concentration of Cl ^- in the circulating water Control ≤2000mg/L.

Most of the make-up water for cooling towers of circulating cooling type power plants is surface water, and a small part is reclaimed water and ground water. The concentration of Cl ^- in surface water and groundwater is generally lower than 100mg/L, and the concentration of Cl ^- in some reclaimed water is also lower than 100mg/L. From the perspective of corrosion of heat exchange tubes by Cl ^- , the concentration ratio of circulating water can be increased to more than 10 times. However, the actual circulating water concentration ratio is generally about 3 to 6 times, which is mainly due to the alkalinity and Ca ²⁺ scaling, which limits the increase of the concentration ratio.

Power plants generally build circulating water make-up water pretreatment systems, such as lime coagulation clarification, weakly acidic cation exchange resin and other processes, to reduce the alkalinity of circulating water make-up water, reduce the alkalinity of circulating water, and increase the concentration ratio. However, the lime coagulation and clarification system has a large amount of civil engineering, a large area, a long transformation period, high investment, high operating costs, and the problem that the sludge is difficult to dispose; Difficult and costly.

Utility model content

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and provide a simple and economical circulating water high concentration ratio system, which can increase the concentration ratio of circulating water, and has simple structure, convenient operation and low cost.

In order to achieve the above purpose, the simple and economic circulating water high concentration rate system described in the utility model includes circulating water replenishment pipeline, cooling tower, nutrient dosing system, nitrifying bacteria acclimation dosing system, circulating water condenser and auxiliary equipment Heat exchange system; the circulating water replenishment pipeline is connected with the water inlet of the cooling tower, the bottom of the cooling tower is provided with flexible packing, the outlet of the nutrient dosing system is connected with the inlet of the nitrifying bacteria domestication dosing system, and the nitrifying bacteria domestication dosing system The outlet of the system is connected with the inlet of the flexible packing, the outlet of the circulating pump at the bottom of the cooling tower is connected with the inlet of the circulating water condenser and the auxiliary heat exchange system, and the outlet of the circulating water condenser and the auxiliary heat exchange system is connected with the The return water port of the cooling tower is connected.

It also includes a controller, a circulating water pH monitoring system and a circulating water bypass filter system, wherein the inlet of the circulating water bypass filter system is connected to the outlet of the circulating pump at the bottom of the cooling tower, and the outlet of the circulating water bypass filter system is connected to the circulation pump. The water pH monitoring system is connected with the return port of the cooling tower, and the output terminal of the circulating water pH monitoring system, the control terminal of the nutrient dosing system and the control terminal of the nitrifying bacteria domestication dosing system are connected with the controller. In addition, the flexible filler has a porous structure.

The utility model has the following beneficial effects:

In the specific operation of the simple and economic circulating water high concentration rate system described in the utility model, the nitrifying bacteria are cultivated through the nitrifying bacteria domestication and dosing system, and then the cultivated nitrifying bacteria are put into the circulating water, and the nitrifying bacteria are absorbed in the circulating water. A nitrification reaction occurs to produce H ⁺ , H ⁺ reacts with the alkali in the circulating water to consume the alkalinity of the circulating water, prevent the scaling of the circulating water, thereby increasing the concentration ratio of the circulating water, and greatly reducing the supplementary water and sewage of the circulating water water volume, simple structure, convenient operation, and low cost. When the existing circulating water system is transformed according to the utility model, it is only necessary to add a nitrifying bacteria acclimation dosing system and a nutrient dosing system on the original basis. The cost is low and does not affect the normal operation of the power plant.

Furthermore, the nitrifying bacteria are autotrophic bacteria, and no carbon source needs to be added to the nutrient, so the concentration of organic matter in the circulating water can be reduced, and the stability of the circulating water system can be improved.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Among them, 1 is cooling tower, 2 is flexible packing, 3 is nitrifying bacteria acclimation dosing system, 4 is nutrient dosing system, 5 is circulating water condenser and auxiliary heat exchange system, 6 is circulating water bypass filtration System 7 is a circulating water pH monitoring system.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

With reference to Fig. 1, the simple and economical circulating water high concentration rate system described in the utility model comprises circulating water replenishment pipeline, cooling tower 1, nutrient agent dosing system 4, nitrifying bacteria domestication dosing system 3 and circulating water condenser and Auxiliary heat exchange system 5; the circulating water supply pipeline is connected to the water inlet of cooling tower 1, the bottom of cooling tower 1 is provided with flexible packing 2, the outlet of nutrient dosing system 4 and the inlet of nitrifying bacteria domestication dosing system 3 The outlet of the nitrifying bacteria domestication dosing system 3 is connected with the inlet of the flexible packing 2, the outlet of the circulating pump at the bottom of the cooling tower 1 is connected with the inlet of the circulating water condenser and the auxiliary heat exchange system 5, and the circulating water The outlet of the condenser and the auxiliary heat exchange system 5 communicates with the water return port of the cooling tower 1 .

The utility model also includes a controller, a circulating water pH monitoring system 7 and a circulating water bypass filter system 6, wherein the inlet of the circulating water bypass filter system 6 is connected with the outlet of the circulating pump at the bottom of the cooling tower 1, and the circulating water bypass The outlet of the flow filtration system 6 is connected with the circulating water pH monitoring system 7 and the return port of the cooling tower 1, the output terminal of the circulating water pH monitoring system 7, the control terminal of the nutrient dosing system 4 and the nitrifying bacteria acclimation dosing system 3 The control terminal is connected to the controller. In addition, the flexible filler 2 has a porous structure.

Concrete work process of the present utility model is:

The circulating water at the bottom of cooling tower 1 enters the circulating water condenser and auxiliary equipment heat exchange system 5 and the circulating water bypass filter system 6 through the outlet of the circulating pump at the bottom of cooling tower 1, and the circulating water condenser and auxiliary equipment heat exchange system The circulating water output by the system 5 enters the cooling tower 1 through the water return port of the cooling tower 1, and the circulating water entering the circulating water bypass filter system 6 is filtered and divided into two paths, one of which passes through the water return port of the cooling tower 1 Enter in the cooling tower 1, another way enters in the circulating water pH monitoring system 7;

The nutrient agent output by the nutrient dosing system 4 enters the nitrifying bacteria domestication dosing system 3 to cultivate the nitrifying bacteria in the nitrifying bacteria domestication dosing system 3, and the nitrifying bacteria cultivated by the nitrifying bacteria dosing system 3 enters the flexible packing 2, and is enriched on the surface of the flexible packing 2, and then enters the circulating water in the cooling tower 1, where the nitrifying bacteria produce H ⁺ through nitrification in the circulating water, and the H ⁺ reacts with the alkali in the circulating water to consume The alkalinity of circulating water prevents scaling of circulating water;

The controller detects the pH value of the circulating water in real time through the circulating water pH monitoring system 7. When the pH value of the circulating water is greater than or equal to the preset value, it controls the nitrifying bacteria acclimation dosing system 3 to increase the output of the nitrifying bacteria, so that the circulating water The pH is within the set range.

Nutrient dosing system 4 is interlocked with nitrifying bacteria domestication dosing system 3 to control the H ⁺ produced by nitrification in circulating water, and nutrient dosing system 4 is interlocked with circulating water pH monitoring system 7 to control alkali in circulating water To avoid acid corrosion of circulating water.

The above is only an example of the implementation steps of the present utility model. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the technical principles of the present utility model. Improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims (3)

1. a kind of recirculated water high concentration ratio system of simple economy, which is characterized in that supplement pipeline, cooling tower including recirculated water (1), nutritional agents dosing system (4), nitrifier domestication dosing system (3) and recirculated water condenser and subsidiary engine heat-exchange system (5)；

Recirculated water supplement pipeline is connected with the water inlet of cooling tower (1), and the bottom of cooling tower (1) is provided with flexible filler (2), The outlet of nutritional agents dosing system (4) is connected with the entrance of nitrifier domestication dosing system (3), and nitrifier tames dosing system (3) outlet is connected with the entrance of flexible filler (2), the circulating-pump outlet of cooling tower (1) tower bottom and recirculated water condenser and The entrance of subsidiary engine heat-exchange system (5) is connected, outlet and cooling tower (1) of recirculated water condenser and subsidiary engine heat-exchange system (5) Water return outlet is connected.

2. the recirculated water high concentration ratio system of simple economy according to claim 1, which is characterized in that further include control Device, recirculated water pH monitoring system (7) and recirculated water bypath filter system (6), wherein recirculated water bypath filter system (6) enter Mouth is connected with the circulating-pump outlet of cooling tower (1) tower bottom, and the outlet of recirculated water bypath filter system (6) and recirculated water pH are monitored The water return outlet of system (7) and cooling tower (1) is connected, and recirculated water pH monitors output end, the nutritional agents dosing system of system (7) (4) control terminal of control terminal and nitrifier domestication dosing system (3) is connected with controller.

3. the recirculated water high concentration ratio system of simple economy according to claim 1, which is characterized in that flexible filler It (2) is porous structure.