Intelligent monitoring system for water balance of chemical enterprise

Abstract

The invention relates to a chemical enterprise water balance intelligent monitoring system, and belongs to the technical field of water balance monitoring, the system comprises a monitoring device and a water consuming device, the monitoring device comprises an application layer, a transmission layer and an acquisition layer, the application layer comprises a management platform, a database server and a monitoring computer, the transmission layer comprises 5G, Wi-Fi and LoRa, and the acquisition layer comprises an acquisition layer. And signal transmission is carried out on the plurality of monitoring nodes through 5G, Wi-Fi and LoRa. According to the intelligent monitoring system for the water balance of the chemical enterprise, by combing water resource information, the process links of water taking, water using, water draining and other systems are mainly analyzed, and a whole-process integrated water resource balance monitoring system based on the Internet of Things is constructed; the centralized display, the operation monitoring, the data analysis and the prediction and early warning of the key data information of the water resource system are realized, so that the production data of the water resource system are fully utilized in the aspect of water balance management, and technical support is provided for mastering the water balance change condition of an enterprise in real time and assisting decision making.

Description

Technical Field

[0001] The invention relates to the technical field of water balance monitoring, and in particular to an intelligent water balance monitoring system for a chemical enterprise. Background Art

[0002] Chemical companies need a lot of water resources for production and living during the production process. Most chemical companies in my country have even scarcer water resources. However, a large amount of mine water will be discharged during the chemical production process. Mine water, as an unconventional water resource, can be treated and utilized to solve the water use problem of the chemical industry and reduce the amount of wastewater discharged.

[0003] Generally, chemical enterprises can be regarded as an independent water-using system, and water balance monitoring can be carried out on them, so as to fully understand the water intake, water use and drainage of the enterprise. Water balance means that within a certain water-using unit, the input water volume and the output water volume comply with the law of conservation of matter and the law of conservation of energy, and there is a balance relationship between various water volumes. At present, the water resource systems of most coal mines use manual reports to record data information such as water intake, water use and drainage, and the reports are mainly daily and monthly reports. There is a large lag in the feedback of abnormal conditions in the water resource system. Water balance analysis and operation scheduling are mainly based on manual experience, and it is impossible to provide effective early warning for the balance problems of the water resource system in a timely manner, and it is impossible to form a unified coordination mechanism for the entire mining area. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an intelligent water balance monitoring system for a chemical enterprise, which has the advantages of convenient monitoring and solves the problem of inconvenience in water balance monitoring in existing chemical enterprises.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a chemical enterprise water balance intelligent monitoring system, comprising monitoring equipment and water-using equipment, the monitoring equipment comprising an application layer, a transmission layer and a collection layer, the application layer comprising a management platform, a database server and a monitoring computer, the transmission layer comprising 5G, Wi-Fi and LoRa, and transmitting signals to multiple monitoring nodes through 5G, Wi-Fi and LoRa, the collection layer comprising a flow collection and transmission node, a pressure collection and transmission node and a water quality collection and transmission node, transmitting signals to the flow collection and transmission node through a flow meter, transmitting signals to the pressure collection and transmission node through a pressure sensor, and transmitting signals to the water quality collection and transmission node through a turbidity and residual chlorine sensor;

[0006] The acquisition layer uses modern sensing technology and monitoring instruments to obtain flow, pressure and water quality information on the pipeline, and completes the perception and aggregation of underlying information data. The transmission layer uses network technology and communication technology to transmit and aggregate information. The application layer is responsible for data processing and information release, and realizes the user interface. The overall B / S architecture is adopted, and data is stored through MySQL. According to specific work needs, business application function modules are built to realize intelligent applications.

[0007] Furthermore, the monitoring equipment includes hardware design and software design, and the hardware design includes a server, a monitoring computer, a monitoring instrument, a data transmission unit and a power supply unit.

[0008] Furthermore, the server is mainly responsible for collecting, storing and analyzing data from the on-site monitoring layer, sending and receiving instructions, and collecting and notifying system information. The server is implemented using a virtual server allocated by the coal mine big data center;

[0009] The monitoring computer acts as a client, accepts user instructions to the server, and receives analyzed data information and alarm information from the server to provide to the user;

[0010] The monitoring instrument uses an ultrasonic flowmeter as a flow sensor, and an external installation method to achieve non-contact flow measurement, and monitor the instantaneous flow and cumulative flow of the monitoring point in real time. The pressure sensor selects an intelligent pressure transmitter, and the water quality sensor includes pH, conductivity and residual chlorine. All of the above sensors have analog 4-20mA signal output and a serial communication interface using the MODBUS protocol;

[0011] Since the water balance monitoring points are located in different positions, the data transmission unit adopts wireless communication technology to realize remote data transmission. The data transmission unit uses a data acquisition terminal with 4G, 5G and WI FI communication functions. The data acquisition terminal uses wired communication with the monitoring instrument and wireless communication with the server;

[0012] The power supply for the water balance monitoring point of the power supply unit is mainly taken from nearby buildings or structures, as well as roadside street lamp control boxes. Solar power supply is used for some points where it is difficult to lay power supply lines. A single solar power supply unit mainly includes a solar panel, a controller and a battery.

[0013] Furthermore, the software design includes a comprehensive display module, a real-time data monitoring module, a data statistics and reporting module, a water use index analysis module, an early warning module and a water balance analysis module.

[0014] Furthermore, the comprehensive display module is based on the mine network map, intuitively displays the installation location of each water balance monitoring point, the online status of the equipment, and real-time data information, displays the information of water intake, water use and drainage in the mine area, and grasps the water resources of the enterprise in real time;

[0015] The data real-time monitoring module includes a display unit, which includes a multi-line list and a block diagram, and the multi-line list and the block diagram both include the measurement point name, number, wireless communication identification code, data update time, instantaneous value, cumulative value and equipment status information;

[0016] The water use index analysis module analyzes the water use situation according to the enterprise's output and per capita water use quota indicators to improve the level of refined water use management;

[0017] The warning module uses threshold warning to set a threshold for the water consumption of each water unit in combination with the water consumption quota of each water unit and the average of the long-term cumulative daily water consumption. When the water consumption is greater than the average consumption, the water pressure and flow data are analyzed to quickly determine whether the water consumption is abnormal. If an abnormality occurs, an emergency warning is issued to remind relevant technical personnel, and the location is determined by the installation position of the sensor to display the position and number of the abnormal position. The warning module uses trend warning. When the water consumption of a certain water unit gradually increases, an alarm will be issued only when the total water consumption exceeds the alarm threshold, resulting in urgent time for handling the fault. For this situation, a trend warning method is adopted. By linearly fitting the change trend of the water consumption data, the slope of the change is determined. At the same time, combined with the historical limit slope, a comparative analysis is performed. When the slope exceeds a certain range, an early warning is issued for the water consumption of the water unit, thereby achieving early warning of abnormal situations and reserving more time for handling faults.

[0018] The water balance analysis module can automatically generate water balance analysis results by screening all water intake, water use and drainage data information in a certain period of time based on water allocation, water consumption per unit of coal production and domestic water quota standards.

[0019] Furthermore, the water-using equipment includes production water and domestic water. The production water includes ground fire-fighting network pipes, ground sprinkler network pipes, external drainage network pipes and chemical plant production water. The domestic water includes staff canteens, single dormitories, comprehensive office buildings, teaching and training centers, comprehensive mining equipment warehouses, equipment and material warehouses, district office buildings, boiler rooms, chemical rooms, machine repair workshops, fire brigades and rescue teams, main factories, subsidiary factories, recycling material warehouses, wastewater treatment stations and domestic sewage treatment stations.

[0020] Furthermore, the wastewater treatment station includes a pretreatment water production pool and a desalination water production pool. The water treated in the pretreatment water production pool can be used to replenish water for chemical plant production and greening water.

[0021] Furthermore, the pretreatment water production pool processes water through pre-sedimentation adjustment, heavy medium rapid sedimentation, high-efficiency clarification and filtration, and the desalination water production pool processes water through self-cleaning filtration, primary ultrafiltration, primary reverse osmosis, secondary high-efficiency precipitation, multi-media filtration, ion exchange, secondary reverse osmosis and evaporative crystallization.

[0022] Furthermore, the water source for domestic water includes a temporary water source and a permanent water source. The temporary water source obtains groundwater by means of a self-provided water well, and the permanent water source uses mine water treated by reverse osmosis.

[0023] Furthermore, except for a small amount of domestic water consumption, the sewage generated is discharged to a domestic sewage treatment station. The domestic sewage treatment station adopts a treatment process of sedimentation regulation, I CEAS biochemical reaction, chemical precipitation, and filtration. The treated reclaimed water is used as water replenishment for chemical plant production and greening water replenishment.

[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0025] The chemical enterprise's water balance intelligent monitoring system, through the sorting of water resource information, focuses on analyzing the process links of water intake, water use and drainage systems, and builds a full-process integrated water resource balance monitoring system based on the Internet of Things. It realizes the centralized display, operation monitoring, data analysis and forecasting and early warning of key data information of the water resource system, so that the production data of the water resource system is fully utilized in water balance management, providing technical support for real-time grasp of the enterprise's water balance changes and auxiliary decision-making. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural block diagram of the monitoring structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the water-using equipment of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1In this embodiment, a chemical enterprise water balance intelligent monitoring system includes monitoring equipment and water use equipment. The monitoring equipment includes an application layer, a transmission layer and a collection layer. The application layer includes a management platform, a database server and a monitoring computer. The transmission layer includes 5G, Wi-Fi and LoRa. Signals are transmitted to multiple monitoring nodes through 5G, Wi-Fi and LoRa. The collection layer includes a flow collection and transmission node, a pressure collection and transmission node and a water quality collection and transmission node. Signals are transmitted to the flow collection and transmission node through a flow meter, and to the pressure collection and transmission node through a pressure sensor. Signals are transmitted to the water quality collection and transmission node through turbidity and residual chlorine sensors.

[0030] The collection layer uses modern sensing technology and monitoring instruments to obtain flow, pressure and water quality information on the pipeline, and completes the perception and aggregation of underlying information data. The transmission layer uses network technology and communication technology to transmit and aggregate information. The application layer is responsible for data processing and information release, and realizes the user interface. The overall B / S architecture is adopted, and data is stored through MySQL. According to specific work needs, business application function modules are built to realize intelligent applications.

[0031] Among them, the monitoring equipment includes hardware design and software design, and the hardware design includes servers, monitoring computers, monitoring instruments, data transmission units and power supply units.

[0032] The server is mainly responsible for collecting, storing and analyzing data from the on-site monitoring layer, sending and receiving instructions, and collecting and notifying system information. The server uses a virtual server allocated by the coal mine big data center to achieve this.

[0033] As the client, the monitoring computer mainly provides a simple, intuitive, fast and convenient human-computer interface, accepts user instructions to the server, and receives analyzed data information and alarm information from the server and provides it to the user.

[0034] The monitoring instrument uses an ultrasonic flow meter with a flow sensor and an external installation method to achieve non-contact flow measurement, and monitor the instantaneous flow and cumulative flow of the monitoring point in real time. The pressure sensor selects an intelligent pressure transmitter, and the water quality sensors include pH, conductivity and residual chlorine. All of the above sensors have analog 4-20mA signal output and a serial communication interface using the MODBUS protocol.

[0035] Since the water balance monitoring points of the data transmission unit are located in different positions, their distribution is very scattered. If a wired method is used, a large number of cables need to be laid, either buried in pipes or overhead with cable trays. The engineering workload and construction difficulty are large. Therefore, wireless communication technology is used to realize remote data transmission. The data transmission unit uses a data acquisition terminal with 4G, 5G and WIFI communication functions. The data acquisition terminal uses wired communication with the monitoring instrument and wireless communication with the server.

[0036] The power supply for the water balance monitoring point of the power supply unit is mainly taken from nearby buildings or structures, as well as the roadside street lamp control box. Solar power supply is used for some points where it is difficult to lay power lines to solve the power supply problem of sensors and data transmission equipment. A single solar power supply unit mainly includes solar panels, controllers and batteries. According to the power demand of the monitoring point, a single monitoring node is equipped with a solar power supply unit with a DC 12V and a capacity of 50Ah lithium battery, which can ensure that a single monitoring node can work continuously under the condition of load power W5W.

[0037] In addition, the software design includes a comprehensive display module, a real-time data monitoring module, a data statistics and reporting module, a water use index analysis module, an early warning module and a water balance analysis module.

[0038] The comprehensive display module is based on the mine network map, and intuitively displays the installation location of each water balance monitoring point, the online status of the equipment, and real-time data information. It displays the information on water intake, water use, and drainage in the mine area, and provides real-time information on the company's water resources.

[0039] The data real-time monitoring module monitors the online status and data collection status of each terminal monitoring module in real time, and intuitively displays the operating status of each monitoring point. It includes a display unit, which is displayed in the form of a multi-line list and a block diagram, including the measuring point name, number, wireless communication identification code, data update time, instantaneous value, cumulative value and equipment status information.

[0040] The data statistics and reporting module uses tables to display the real-time water consumption of each water-using unit in minutes, and queries are conducted in days to form tabular daily, monthly and annual reports, so as to grasp the specific water consumption of each water-using unit. The data statistics and reporting module uses graphics to intuitively display the peak and valley values ​​of water consumption and the changing trends of each water-using unit. It forms hourly, daily, monthly and annual water consumption line graphs and bar graphs for each water-using unit according to time, and draws a line graph of daily and monthly water consumption for the same water-using unit.

[0041] The water usage index analysis module analyzes the water usage situation based on the company's output and per capita water quota indicators to improve the level of refined water management.

[0042] The early warning module uses threshold warning, combined with the water consumption quota of each water unit and the average of the long-term cumulative daily water consumption, to set a threshold for the water consumption exceeding the limit for each water unit. When the water consumption is greater than the average consumption, the analysis of water pressure and flow data can quickly determine whether the water consumption is abnormal. If an abnormality occurs, an emergency warning will be issued to remind relevant technical personnel, and the location will be located through the installation position of the sensor to display the direction and number of the abnormal position, such as serious pipeline leakage or pipe burst. The early warning module uses trend warning. When the water consumption of a certain water unit gradually increases, an alarm will only be issued when the total water consumption exceeds the alarm threshold, resulting in urgent time for handling the fault. In this case, the trend warning method is adopted. By linear fitting the change trend of the water consumption data, the slope of the change is determined, and combined with the historical limit slope, comparative analysis is performed. When the slope exceeds a certain range, an early warning is issued for the water consumption of the water unit, thereby achieving early warning of abnormal situations and reserving more time for handling faults.

[0043] The water balance analysis module automatically generates water balance analysis results by screening all water intake, water use and drainage data information in a certain period of time, based on water allocation, water consumption per unit of coal production and domestic water quota standards.

[0044] See also Figure 2 The water-using equipment includes production water and domestic water. The production water includes ground fire-fighting network pipes, ground sprinkler network pipes, external discharge network pipes and chemical plant production water. The domestic water includes staff canteens, single dormitories, comprehensive office buildings, teaching and training centers, comprehensive mining equipment warehouses, equipment and material warehouses, district office buildings, boiler rooms, chemical rooms, machine repair workshops, fire brigades and rescue teams, main factories, auxiliary factories, recycling material warehouses, wastewater treatment stations and domestic sewage treatment stations.

[0045] The wastewater treatment station includes a pretreatment water production pool and a desalination water production pool. The water treated in the pretreatment water production pool can be used to replenish water for chemical plant production and greening water.

[0046] The pretreatment water production pool processes water through pre-sedimentation adjustment, heavy medium rapid sedimentation, high-efficiency clarification and filtration, and the desalination water production pool processes water through self-cleaning filtration, primary ultrafiltration, primary reverse osmosis, secondary high-efficiency sedimentation, multi-media filtration, ion exchange, secondary reverse osmosis and evaporative crystallization.

[0047] The sources of domestic water include temporary water sources and permanent water sources. The temporary water source uses groundwater obtained by self-provided water wells, and the permanent water source uses mine water treated by reverse osmosis.

[0048] Except for a small amount of domestic water consumption, the generated sewage is discharged to the domestic sewage treatment station. The domestic sewage treatment station adopts the treatment process of sedimentation regulation, I CEAS biochemical reaction, chemical precipitation and filtration. The treated reclaimed water is used as water replenishment for chemical plant production and greening water replenishment.

[0049] Beneficial effects:

[0050] By sorting out water resource information, we focused on analyzing the process links of water intake, water use and drainage systems, and built a full-process integrated water resource balance monitoring system based on the Internet of Things. We achieved centralized display of key data information of the water resource system, operation monitoring, data analysis, and forecasting and early warning, so that the production data of the water resource system is fully utilized in water balance management, providing technical support for real-time grasp of the company's water balance changes and auxiliary decision-making.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water balance intelligent monitoring system for a chemical enterprise, including monitoring equipment and water-using equipment, characterized in that: The monitoring equipment includes an application layer, a transmission layer and a collection layer. The application layer includes a management platform, a database server and a monitoring computer. The transmission layer includes 5G, Wi-Fi and LoRa. Signals are transmitted to multiple monitoring nodes through 5G, Wi-Fi and LoRa. The collection layer includes a flow collection and transmission node, a pressure collection and transmission node and a water quality collection and transmission node. Signals are transmitted to the flow collection and transmission node through a flow meter, to the pressure collection and transmission node through a pressure sensor, and to the water quality collection and transmission node through a turbidity and residual chlorine sensor. The acquisition layer uses modern sensing technology and monitoring instruments to obtain flow, pressure and water quality information on the pipeline, and completes the perception and aggregation of underlying information data. The transmission layer uses network technology and communication technology to transmit and aggregate information. The application layer is responsible for data processing and information release, and realizes the user interface. The overall B / S architecture is adopted, and data is stored through MySQL. According to specific work needs, business application function modules are built to realize intelligent applications.

2. According to claim 1, a chemical enterprise water balance intelligent monitoring system is characterized by: The monitoring equipment includes hardware design and software design, and the hardware design includes a server, a monitoring computer, a monitoring instrument, a data transmission unit and a power supply unit.

3. The intelligent water balance monitoring system for a chemical enterprise according to claim 2 is characterized by: The server is mainly responsible for collecting, storing and analyzing data from the on-site monitoring layer, sending and receiving instructions, and collecting and notifying system information. The server is implemented using a virtual server allocated by the coal mine big data center; The monitoring computer acts as a client, accepts user instructions to the server, and receives analyzed data information and alarm information from the server to provide to the user; The monitoring instrument uses an ultrasonic flowmeter as a flow sensor, and an external installation method to achieve non-contact flow measurement, and monitor the instantaneous flow and cumulative flow of the monitoring point in real time. The pressure sensor selects an intelligent pressure transmitter, and the water quality sensor includes pH, conductivity and residual chlorine. All of the above sensors have analog 4-20mA signal output and a serial communication interface using the MODBUS protocol; Since the water balance monitoring points are located in different positions, the data transmission unit adopts wireless communication technology to realize remote data transmission. The data transmission unit uses a data acquisition terminal with 4G, 5G and WIFI communication functions. The data acquisition terminal uses wired communication with the monitoring instrument and wireless communication with the server; The power supply for the water balance monitoring point of the power supply unit is mainly taken from nearby buildings or structures, as well as roadside street lamp control boxes. Solar power supply is used for some points where it is difficult to lay power supply lines. A single solar power supply unit mainly includes a solar panel, a controller and a battery.

4. The intelligent water balance monitoring system for a chemical enterprise according to claim 2 is characterized by: The software design includes a comprehensive display module, a real-time data monitoring module, a data statistics and reporting module, a water use index analysis module, an early warning module and a water balance analysis module.

5. The intelligent water balance monitoring system for a chemical enterprise according to claim 4 is characterized by: The comprehensive display module is based on the mine network map, intuitively displays the installation location of each water balance monitoring point, equipment online status, real-time data information, and displays the information of water intake, water use and drainage in the mine area, so as to grasp the water resources of the enterprise in real time; The data real-time monitoring module includes a display unit, which includes a multi-line list and a block diagram, and the multi-line list and the block diagram both include the measurement point name, number, wireless communication identification code, data update time, instantaneous value, cumulative value and equipment status information; The water use index analysis module analyzes the water use situation according to the enterprise's output and per capita water use quota indicators to improve the level of refined water use management; The warning module uses threshold warning to set a threshold for the water consumption of each water unit in combination with the water consumption quota of each water unit and the average of the long-term cumulative daily water consumption. When the water consumption is greater than the average consumption, the water pressure and flow data are analyzed to quickly determine whether the water consumption is abnormal. If an abnormality occurs, an emergency warning is issued to remind relevant technical personnel, and the location is determined by the installation position of the sensor to display the position and number of the abnormal position. The warning module uses trend warning. When the water consumption of a certain water unit gradually increases, an alarm will be issued only when the total water consumption exceeds the alarm threshold, resulting in urgent time for handling the fault. In response to this situation, a trend warning method is adopted to perform a linear fitting on the change trend of the water consumption data to determine its change slope. At the same time, combined with the historical limit slope, a comparative analysis is performed. When the slope exceeds a certain range, an early warning is issued for the water consumption of the water unit, thereby achieving early warning of abnormal situations and reserving more time for handling faults. The water balance analysis module can automatically generate water balance analysis results by screening all water intake, water use and drainage data information in a certain period of time based on water allocation, water consumption per unit of coal production and domestic water quota standards.

6. The intelligent water balance monitoring system for a chemical enterprise according to claim 1 is characterized by: The water-using equipment includes production water and domestic water. The production water includes ground fire-fighting network pipes, ground sprinkler network pipes, external drainage network pipes and chemical plant production water. The domestic water includes staff canteens, single dormitories, comprehensive office buildings, teaching and training centers, comprehensive mining equipment warehouses, equipment and material warehouses, district office buildings, boiler rooms, chemical rooms, machine repair workshops, fire brigades and rescue teams, main factories, subsidiary factories, recycling material warehouses, wastewater treatment stations and domestic sewage treatment stations.

7. The intelligent water balance monitoring system for a chemical enterprise according to claim 6 is characterized by: The wastewater treatment station comprises a pre-treatment water production pool and a desalination water production pool. The water treated in the pre-treatment water production pool can be used to replenish water for chemical plant production and greening water.

8. The intelligent water balance monitoring system for a chemical enterprise according to claim 7 is characterized by: The pretreatment water production pool processes water through pre-sedimentation adjustment, heavy medium rapid sedimentation, high-efficiency clarification and filtration, and the desalination water production pool processes water through self-cleaning filtration, primary ultrafiltration, primary reverse osmosis, secondary high-efficiency precipitation, multi-media filtration, ion exchange, secondary reverse osmosis and evaporative crystallization.

9. The intelligent water balance monitoring system for a chemical enterprise according to claim 6, characterized in that: The water source for domestic water includes a temporary water source and a permanent water source. The temporary water source obtains groundwater by means of a self-provided water well, and the permanent water source uses mine water treated by reverse osmosis.

10. The intelligent water balance monitoring system for a chemical enterprise according to claim 6, characterized in that: Except for a small amount of domestic water consumption, the sewage generated is discharged to the domestic sewage treatment station. The domestic sewage treatment station adopts the treatment process of sedimentation regulation, I CEAS biochemical reaction, chemical precipitation and filtration. The treated reclaimed water is used as water replenishment for chemical plant production and greening water replenishment.

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