Unit operation cost statistical method and device for chemical desalted water treatment system

Abstract

The invention discloses a unit operation cost statistical method and device for a chemical desalted water treatment system. The method and device can achieve the real-time calculation of the chemicaldesalted water treatment system, and effectively solve a problem that a conventional manual statistical result is severely lagged. According to the invention, the unit operation cost of a mechanicallyadding tank, an ultrafiltration device, a reverse osmosis device, a primary desalting device and a mixed bed can be respectively calculated, so that the whole process cost analysis of chemical desalted water can be realized, and the data support is provided for the chemical specialized analysis operation cost change and the medicament quality comparison of different manufacturers; the electric quantity cost is calculated by adopting the electric quantity sharing coefficient, so that the accuracy of a calculation result is ensured; and the operation state of each device is judged in real time,so that the accuracy of each cost statistics is ensured.

Description

technical field [0001] The invention relates to the technical field of coal-fired power plants, in particular to a method and device for calculating the unit operating cost of a chemical desalinated water treatment system. Background technique [0002] In order to adapt to the new requirements of environmental protection, energy conservation and emission reduction, and to reduce investment and operating costs, a new model of water treatment system construction in coal-fired power plants has emerged—the water island EPC construction model (referred to as water island). Such as figure 1 As shown, the water island mainly includes the chemical desalination treatment system, the circulating water treatment system, the condensate polishing treatment system and the sewage and wastewater treatment system, among which, the structure of the chemical desalination treatment system is as follows figure 2 shown. The water island construction model adopts multi-water arrangement such as...

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Problems solved by technology

[0004] (1) Traditional statistical methods cannot separately count the unit operating costs of various treatment devices in the chemical desalinated water treatment system in the water island, but the unit operating costs of various treatment devices in the chemical desalinated water treatment system can be used for the economic analysis of the water island operation Provide reliable data support

[0005] (2) The traditional statistical method is to use manual statistics to make statistics on a monthly or annual basis, and the results are lagging behind, which cannot reflect the real changes in the unit operating cost of desalinated water;

[0006] (3) In the existing water island, based on investment cost considerations, usually only one electric meter (smart electricity meter) is put into the water island, and the electric meter covers chemical desalination water treatment, circulating water treatment, condensate water treatment and sewage and wastewater treatment, etc. The power consumption of the system, the traditional statistical method defaults that the electric pumps of each system are in the running state, and the "sum of the rated power of the electric pumps of the chemical desalinated water treatment system / the sum of the rated powers of the electric pumps of each system of the water island" is used to obtain the fixed empirical coefficient method to calculate the power consumption of the chemical desalinated water treatment system in the statistical cycle. This scheme does not consider the actual operating status of the electric pumps in the water island system (the existing calculation scheme assumes that the electric pumps of each system are in the operating state by default), resulting in the calculation of power consumption. The amount of error is large

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