Water Balance Test Procedure for Water Balance Testing

It can be divided into four stages:

Preparation stage: Organizational preparation: Set up a special test leadership group and test team, which are responsible for the leadership and implementation of the test work.

Technical preparation: hold a project kick-off meeting, divide the test area, conduct preliminary research, and formulate a test report in line with the actual situation of the enterprise.

Measurement stage: use ultrasonic flowmeter to measure all water points, obtain the real water volume of water points, and scientifically test the water value of each link of water supply, use, consumption, and discharge of water system.

Summary analysis stage: The purpose of the rational analysis of water use in the whole plant is to plan the technical measures for rational water use and formulate the reasonable water quota. Analyze the current situation of water use through the seven-link analysis method of water system (unique to Jinma Company).

water vapor transport link; water production; process water link; recycled water; steam and condensate; domestic water link; sewage reuse;

Report stage: Analyze each water system according to the seven-link analysis method, put forward suggestions and improvement measures, complete the report, and attach process data and original data test data.

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Water balance test is a basic work to strengthen the scientific management of water use and maximize water conservation and rational water use. The following can be achieved through the water balance test:

1) Understand the current situation of water use in enterprises. For example, the distribution of water pipe network, the distribution and operation status of various water equipment and instruments; The quantitative relationship between the total water consumption and each water use unit can obtain accurate measured data;

2) Conduct a reasonable analysis of the current situation of water use by the enterprise. Calculate, analyze, and evaluate relevant water technical and economic indicators based on the information and data obtained, identify weak links and water-saving potential, and formulate feasible technical measures, management measures and technological transformation plans;

3) Find out the leakage points of the enterprise's water pipe network and facilities, and take repair measures to plug the leakage;

4) The water use indicators can be decomposed layer by layer to reach each water use unit, and the planned water use can be included in the contract responsibility system or target management plan at all levels, and the regular assessment can mobilize the enthusiasm of all aspects for water conservation;

5) Establish water use files, improve unit water metering instruments, and train a group of management personnel who are familiar with the current situation of industrial water use in the enterprise;

6) Provide more accurate basic data for the formulation of water quotas and planned water consumption indicators.

Comply with national regulations and enterprise system requirements

In accordance with the Water Law of the People's Republic of China, which came into effect on October 1, 2002, the principle of water conservation has been determined, and specific provisions have been made on industrial water use and water conservation.

The former National Economic Commission, the Ministry of Water Resources, the Ministry of Construction, the Ministry of Science and Technology, the State Environmental Protection Administration, and the State Administration of Taxation clearly put forward the "Opinions on Strengthening Industrial Water Conservation" to "carry out water balance tests in a timely manner".

The water balance test should be carried out once every three years in accordance with the guidelines and the requirements of the headquarters, the company and the locality.

Article 9 of Sinopec's "Measures for the Administration of Industrial Water" stipulates that the responsibilities of the competent department (division and section) of the branch (subsidiary) company (9) shall be responsible for organizing the preparation of industrial water balance tests and water quotas of the unit.

1. Water balance test is an effective method for scientific management of water consumption units, and it is also the basis for further urban water conservation.

2. The significance of the water balance test lies in the fact that through the water balance test, we can fully understand the status of the pipe network of the water use unit, the current situation of water use of each part (unit), draw a water balance map, find out the water balance relationship and the reasonable degree of water use according to the measured water quantity data, and take corresponding measures to tap the potential of water use, so as to strengthen water management and improve the level of reasonable water use.

1. Check the test results.

Due to the large number of water units and the large test workload, it is difficult for some units to read the meter at the same time for each water unit, and it is inevitable that there will be errors in the test. In order to ensure the quality of the test, it is required that the difference between the sum of the daily water intake obtained in the test stage and the actual total daily water intake of the unit in the same period is not more than 10%, and the test results can be considered to meet the requirements. Otherwise, you should continue to look for missed tests and calculation errors until the requirements are met.

2. Analysis of all kinds of water use.

All kinds of water use are summarized and classified according to their uses, calculated according to the water use assessment index system, and the reasonable level of water use is analyzed. At the same time, with reference to the water conservation standards of various industries and the actual situation of water use, determine the amount of water that can be used for various types of discharge.

3. Formulation of water-saving plans and plans.

According to the analysis of various unreasonable water use factors, corresponding administrative and technical measures should be taken to formulate water-saving poetry and planning. The following points should be grasped when formulating water-saving plans and plans: (1) Maximize the reuse rate of water, such as establishing and improving cooling water, process water recycling system, wastewater reuse, increasing the concentration ratio of circulating water, establishing a reclaimed waterway system, etc., to reduce the amount of new water withdrawn; (2) Reform the water use process, update the water equipment and appliances, and adopt the processes, equipment and appliances that do not use water or use less water; (3) Increase the investment in water-saving technological transformation.

Priority should be given to projects with large water consumption and serious waste, and water-saving projects should be planned as a whole, and a time limit should be set and a target responsibility system should be implemented; (4) Pay attention to the technical and economic advancement of the implementation of water-saving technical measures, and pay attention to the investment benefits of water-saving; (5) Adjust the water quota and planned water consumption index according to the test results, and decompose and issue the water supply unit.

**Reference. Refer to the reference method document for calculating the water balance test fee issued by the Shenzhen Municipal Water Affairs Bureau.

In order to promote the application of this scientific management method in urban water-saving management, the Ministry of Construction issued the ministerial standard CJ20-87 "Water Balance Test Method for Industrial Enterprises" in April 1987, and the National Energy Foundation and Management Standards Committee issued the national standard GB T12452-90 "General Principles for Enterprise Water Balance and Testing" in 1990. Some provincial and municipal people** have also incorporated the water balance test into local administrative regulations and rules, such as Article 12 of the "Implementation Measures for Urban Water Conservation Management in Hebei Province", which stipulates: "Urban water use units shall, in accordance with national standards, regularly conduct water balance tests and reasonable water use evaluations on the water use of their own units, and improve their water use technology."

It has become a legal obligation for water users to conduct water balance tests in accordance with regulations.

Broadly speaking, water balance refers to the water balance of water users as the object of investigation, that is, the sum of the input water of each water use unit or system of the water use unit should be equal to the sum of the output water volume; Water balance test refers to the process of systematically testing, statistical, and analyzing the water volume of water use units and water use systems to obtain the water balance relationship. The water balance test is an effective method for the scientific management of water users, and it is also the basis for further urban water conservation. Its significance lies in the fact that through the test, we can fully understand the status of the pipe network of the water consumption unit, the current situation of water use in each part (unit), draw a water balance map, find out the water balance relationship and the reasonable water use degree according to the measured water volume data, and take corresponding measures to tap the water use potential, so as to strengthen water management and improve the reasonable water use level.