Automatic blending device for oilfield sewage

Abstract

The invention relates to an automatic oilfield sewage mixing device which comprises a clean water suction system, a sewage suction system, a mixing system and a discharge system, the clean water suction system and the sewage suction system are respectively communicated with the mixing system through pipelines and are respectively used for feeding clean water and sewage into the mixing system, and the clean water and the sewage are mixed by the mixing system; the mixing system is communicated with the discharging system through a pipeline. The automatic mixing device and the recycling method provided by the invention have the beneficial effects that the overall targets of shortening the sewage treatment flow, simplifying the front-end treatment process, reducing the treatment cost and improving the resource utilization level are achieved, and resources are saved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an automatic mixing device for oilfield sewage. Background Art

[0002] As my country's oil and gas resource development gradually deepens, the amount of clean water used in oil and gas field development and the amount of sewage produced increase accordingly, and the resource utilization rate is insufficient. On the one hand, it leads to an increase in the cost of oil field exploration and development, and on the other hand, it puts great pressure on water resources and water environment. Over the years, the country has vigorously advocated the development of green oil fields, and environmental protection policies have become increasingly stringent. The requirements for the control indicators of deep well reinjection and external sewage have gradually increased, and the treatment costs remain high. The recycling of sewage after treatment will be an effective means to alleviate the contradiction between oil field production and regional water resource scarcity and environmental pollution. In the face of severe environmental protection situations, on the one hand, it is necessary to reduce the cost of sewage treatment, and on the other hand, it is necessary to strengthen water resource management and increase the recycling of sewage. This is not only a requirement of national environmental protection laws and policies, but also a need for green and sustainable development of enterprises.

[0003] The wastewater generated during the development of oil fields has complex components and systems, and many types of pollutants, including residual operating fluids and treatment agents from drilling and measures, as well as pollutants such as formation water, minerals, organic matter, and bacteria. There are also oil displacement agents added during the later injection and production development process. The mineralization is high, and it will cause soil alkalinization and compaction when discharged, causing serious pollution to the environment. According to the requirements of oil field operations, the main control indicators for recycling are oil, suspended solids, and high-valent negative effect ions, especially high-valent ions such as Ca, Mg, Al, and Fe, which seriously affect the recycling of wastewater. In order to meet the requirements of recycling for high-valent negative effect ions, there are currently two main methods: one is to develop flocculation sedimentation, fine filtration, ion complexation, reverse osmosis and other treatment processes suitable for oilfield wastewater to control ion concentration. This method has the problems of long process flow and high cost; the other is to develop a drilling and measures operating fluid system suitable for high mineralization. At present, this technology is not mature, and it is difficult to meet the recycling requirements of wastewater with a mineralization of more than 100,000 mg / L, which has certain limitations.

[0004] Aiming at the overall goal of reducing the high cost of oilfield wastewater treatment and improving the level of wastewater recycling, an oilfield wastewater automatic mixing process and device is provided to mainly solve the following technical problems:

[0005] 1) Oilfield wastewater contains many types of pollutants and high content of negative high-valent ions, which cannot meet the recycling standards;

[0006] 2) The ion complexation and precipitation treatment processes are complex, long and costly;

[0007] 3) During the sewage recycling process, water quality parameters are monitored and regulated online to ensure the performance of the operating fluid;

[0008] 4) According to the wastewater recycling control index and the actual water demand of the production site, a pollutant concentration control method is provided to meet the requirements of the recycling water index. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide an automatic oilfield sewage mixing device, aiming to solve the problems in the prior art.

[0010] The technical solution of the present invention to solve the above technical problems is as follows:

[0011] An automatic oilfield sewage mixing device comprises a clean water suction system, a sewage suction system, a mixing system and a discharge system. The clean water suction system and the sewage suction system are connected to the mixing system through pipelines, respectively, and are used to send clean water and sewage into the mixing system, respectively, and the mixing system mixes them; the mixing system is connected to the discharge system through pipelines.

[0012] The beneficial effect of the present invention is that during the treatment process, clean water and sewage are respectively sent into the mixing system according to the set ratio through the clean water suction system and the sewage suction system, and then the clean water and sewage are mixed through the mixing system so that the sewage reaches the standard for reuse, and is discharged from the discharge system for reuse, thereby saving resources and reducing costs.

[0013] The present invention provides an automatic mixing device and a recycling method, which can achieve the overall goal of shortening the sewage treatment process, simplifying the front-end treatment process, reducing the treatment cost, and improving the level of resource utilization, thereby saving resources.

[0014] Based on the above technical solution, the present invention can also be improved as follows.

[0015] Furthermore, the clean water intake system includes a clean water distributor and a clean water pump, the water inlet of the clean water pump is connected to the clean water distributor through a pipeline, and the water outlet of the clean water pump is connected to the mixing system through a pipeline.

[0016] The beneficial effect of adopting the above further scheme is that during treatment, the clean water sent from the clean water distributor is sent to the mixing system through the clean water pump, thereby realizing automatic transportation of clean water, which is convenient and efficient.

[0017] Furthermore, the clean water intake system further comprises a clean water flow meter, and the clean water flow meter is fixedly installed on the pipeline connecting the clean water pump and the mixing system.

[0018] The beneficial effect of adopting the above further scheme is that during the treatment process, the volume of clean water fed in is measured by a clean water flow meter so that the clean water and sewage are accurately mixed, thereby allowing the sewage to quickly reach the recycling standard with high accuracy.

[0019] Furthermore, the clean water intake system also includes a clean water quality monitoring unit, the water inlet of the clean water quality monitoring unit is connected to the water outlet of the clean water pump through a pipeline, and the water outlet is connected to the water inlet of the clean water pump through a pipeline.

[0020] The beneficial effect of adopting the above further scheme is that during the treatment process, the water quality of the incoming clean water is monitored by the clean water quality monitoring unit so that the water quality of the clean water can be understood in a timely manner.

[0021] Furthermore, the sewage suction system includes a sewage water distributor and a sewage pump, the water inlet of the sewage pump is connected to the sewage water distributor through a pipeline, and the water outlet of the sewage pump is connected to the mixing system through a pipeline.

[0022] The beneficial effect of adopting the above further scheme is that during treatment, the sewage sent from the sewage distributor is sent into the mixing system through the sewage pump, thereby realizing automatic transportation of sewage, which is convenient and efficient.

[0023] Furthermore, the sewage suction system also includes a sewage flow meter, which is fixedly installed on the pipeline connecting the sewage pump and the mixing system.

[0024] The beneficial effect of adopting the above further scheme is that during the treatment process, the volume of the sewage fed in is measured by the sewage flow meter so that the sewage and the clean water are accurately mixed, so that the sewage quickly reaches the recycling standard with high accuracy.

[0025] Furthermore, the sewage suction system also includes a filter, and the filter is fixedly installed on the pipeline connecting the sewage pump and the sewage water distributor.

[0026] The beneficial effects of adopting the above further scheme are simple structure and reasonable design. The sewage sent from the sewage distributor is filtered through the filter to remove some impurities in the sewage, thereby preventing the impurities from affecting the working performance of the subsequent sewage pump.

[0027] Furthermore, the sewage suction system also includes a sewage water quality monitoring unit, the water inlet of the sewage water quality monitoring unit is connected to the water outlet of the sewage pump through a pipeline, and the water outlet is connected to the water inlet of the sewage pump through a pipeline.

[0028] The beneficial effect of adopting the above further scheme is that during the treatment process, the water quality of the sewage sent in is monitored by the sewage quality monitoring unit so as to timely understand the water quality of the sewage.

[0029] Furthermore, at least one dosing port is provided on the pipeline communicating between the sewage pump and the mixing system, and a dosing valve is fixedly installed at each of the dosing ports.

[0030] The beneficial effect of adopting the above further scheme is that during the treatment process, according to the results of sewage quality monitoring, chemicals are added to the sewage through the dosing port to adjust the pH of the sewage or perform sterilization, further making the sewage meet the standards for recycling.

[0031] Furthermore, it also includes a skid seat and a control system, the clean water suction system, the sewage suction system, the mixing system and the control system are respectively fixedly installed on the skid seat, and the clean water suction system, the sewage suction system and the mixing system are respectively communicatively connected with the control system.

[0032] The beneficial effect of adopting the above further scheme is that during processing, the operation of each system is controlled by the control system, with a high degree of automation and high operating efficiency; in addition, the various systems are integrated into one through the skid seat, with high integration and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is one of the structural schematic diagrams of the present invention;

[0034] Figure 2 This is the second structural schematic diagram of the present invention.

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1. Clean water suction system; 11. Clean water distributor; 12. Clean water pump; 13. Clean water flow meter; 14. Clean water quality monitoring unit; 2. Sewage suction system; 21. Sewage distributor; 22. Sewage pump; 23. Sewage flow meter; 24. Sewage quality monitoring unit; 25. Filter; 26. Dosing port; 3. Mixing system; 4. Discharge system; 5. Skid seat; 6. Control system. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0041] Example 1

[0042] like Figure 1 and Figure 2 As shown, this embodiment provides an automatic oilfield sewage mixing device, including a clean water suction system 1, a sewage suction system 2, a mixing system 3 and a discharge system 4, wherein the clean water suction system 1 and the sewage suction system 2 are connected to the mixing system 3 through pipelines, respectively, and are used to respectively deliver clean water and sewage into the mixing system 3, and the mixing system 3 mixes them; the mixing system 3 is connected to the discharge system 4 through pipelines.

[0043] During the treatment process, clean water and sewage are respectively sent into the mixing system 3 according to the set ratio through the clean water suction system 1 and the sewage suction system 2, and then the clean water and sewage are mixed through the mixing system 3 so that the sewage meets the reuse standard and is discharged from the discharge system for reuse, thereby saving resources and reducing costs.

[0044] Preferably, in this embodiment, the above-mentioned discharge system 4 includes a water outlet distributor, which includes a main pipe, one end of which is open and the other end is closed, and one end of which is connected to the mixing system 3; a plurality of water outlet interfaces are evenly spaced and fixedly connected on the main pipe.

[0045] This embodiment provides an automatic mixing device and a recycling method, which achieves the overall goal of shortening the sewage treatment process, simplifying the front-end treatment process, reducing treatment costs, and improving the level of resource utilization, thereby saving resources.

[0046] Example 2

[0047] On the basis of Example 1, in this embodiment, the clean water intake system 1 includes a clean water distributor 11 and a clean water pump 12, the water inlet of the clean water pump 12 is connected to the clean water distributor 11 through a pipeline, and the water outlet of the clean water pump 12 is connected to the mixing system 3 through a pipeline.

[0048] During the treatment, the clean water sent from the clean water distributor 11 is sent into the mixing system 3 through the clean water pump 12, so that the clean water is automatically transported, which is convenient and efficient.

[0049] Based on the above scheme, the above-mentioned clean water distributor 11 includes a main pipe with both ends closed, which is connected to the water inlet of the clean water pump 12 through a pipeline, and has multiple clean water connecting pipes fixedly installed thereon at intervals. The multiple clean water connecting pipes are respectively connected to the main pipe and are respectively used to connect to external clean water supply equipment.

[0050] It should be noted that the above-mentioned clean water distributor 11 and clean water pump 12 adopt existing technologies, and their specific structures and principles are not described in detail here.

[0051] Example 3

[0052] On the basis of Example 2, in this embodiment, the clean water intake system 1 further includes a clean water flow meter 13 , and the clean water flow meter 13 is fixedly installed on the pipeline connecting the clean water pump 12 and the mixing system 3 .

[0053] During the treatment process, the volume of the clean water fed in is measured by the clean water flow meter 13 so that the clean water and the sewage are accurately mixed, thereby allowing the sewage to quickly reach the standard for recycling with high accuracy.

[0054] It should be noted that the above-mentioned clean water flow meter 13 adopts the existing technology, and its specific structure and principle are not described in detail here.

[0055] Example 4

[0056] On the basis of any one of Examples 2 to 3, in this embodiment, the clean water intake system 1 also includes a clean water quality monitoring unit 14, the water inlet of the clean water quality monitoring unit 14 is connected to the water outlet of the clean water pump 12 through a pipeline, and the water outlet is connected to the water inlet of the clean water pump 12 through a pipeline.

[0057] During the treatment process, the water quality of the clean water sent in is monitored by the clean water quality monitoring unit 14 so as to timely understand the water quality of the clean water.

[0058] Preferably, in this embodiment, the clean water quality monitoring unit 14 includes at least one water quality sensor.

[0059] The number of the above-mentioned water quality sensors is preferably multiple, and multiple water quality sensors are distributed side by side, which has a reasonable design and higher monitoring accuracy.

[0060] A closed loop is formed between the clean water quality monitoring unit 14 and the water inlet and outlet of the clean water pump 12. This design can make the water flow in the pipeline smoother, reduce the scouring of the probe of the clean water quality monitoring unit 14 by the water flow, extend the service life of the probe, and make the monitoring more accurate.

[0061] Example 5

[0062] On the basis of the above embodiments, in this embodiment, the sewage suction system 2 includes a sewage water distributor 21 and a sewage pump 22, the water inlet of the sewage pump 22 is connected to the sewage water distributor 21 through a pipeline, and the water outlet thereof is connected to the mixing system 3 through a pipeline.

[0063] During treatment, the sewage sent from the sewage distributor 21 is sent into the mixing system 3 through the sewage pump 22, so that the sewage is automatically transported, which is convenient and efficient.

[0064] Based on the above scheme, the above-mentioned sewage water distributor 21 includes a main pipe with both ends closed, which is connected to the water inlet of the sewage pump 22 through a pipeline, and has multiple sewage connecting pipes fixedly installed on it at intervals. The multiple sewage connecting pipes are respectively connected to the main pipe and are respectively used to connect to external sewage water supply equipment.

[0065] It should be noted that the above-mentioned sewage water distributor 21 and sewage pump 22 respectively adopt existing technologies, and their specific structures and principles are not described in detail here.

[0066] Example 6

[0067] On the basis of Example 5, in this embodiment, the sewage suction system 2 further includes a sewage flow meter 23 , and the sewage flow meter 23 is fixedly installed on the pipeline connecting the sewage pump 22 and the mixing system 3 .

[0068] During the treatment process, the volume of the sewage fed in is measured by the sewage flow meter 23 so that the sewage and the clean water are accurately mixed, thereby allowing the sewage to quickly reach the standard for recycling with high accuracy.

[0069] It should be noted that the above-mentioned sewage flow meter 23 adopts the existing technology, and its specific structure and principle are not described in detail here.

[0070] Example 7

[0071] On the basis of any one of Embodiments 5 to 6, in this embodiment, the sewage suction system 2 further includes a filter 25 , and the filter 25 is fixedly installed on the pipeline connecting the sewage pump 22 and the sewage water distributor 21 .

[0072] This solution has a simple structure and a reasonable design. The sewage sent from the sewage distributor 21 is filtered through the filter 25 to remove some impurities in the sewage, thereby preventing the impurities from affecting the working performance of the subsequent sewage pump.

[0073] It should be noted that the filter 25 mentioned above adopts the existing technology, and its specific structure and principle are not described in detail here.

[0074] Example 8

[0075] Based on any one of Examples 5 to 7, in this embodiment, the sewage suction system 2 also includes a sewage water quality monitoring unit 24, the water inlet of the sewage water quality monitoring unit 24 is connected to the water outlet of the sewage pump 22 through a pipeline, and the water outlet is connected to the water inlet of the sewage pump 22 through a pipeline.

[0076] During the treatment process, the water quality of the input sewage is monitored by the sewage quality monitoring unit 24 so as to timely understand the water quality of the sewage.

[0077] Preferably, in this embodiment, the sewage water quality monitoring unit 24 includes at least one water quality sensor.

[0078] The number of the above-mentioned water quality sensors is preferably multiple, and multiple water quality sensors are distributed side by side, which has a reasonable design and higher monitoring accuracy.

[0079] A closed loop is formed between the sewage water quality monitoring unit 24 and the water inlet and outlet of the sewage pump 22. This design can make the water flow in the pipeline smoother, reduce the scouring of the probe of the sewage water quality monitoring unit 24 by the water flow, extend the service life of the probe, and make the monitoring more accurate.

[0080] Example 9

[0081] On the basis of Example 8, in this embodiment, at least one dosing port 26 is provided on the pipeline connecting the sewage pump 22 and the mixing system 3, and a dosing valve is fixedly installed at each dosing port 26.

[0082] Preferably, in this embodiment,

[0083] The number of the above-mentioned dosing ports 26 is preferably multiple, and dosing valves are fixedly installed at each of the multiple dosing ports 26 .

[0084] During the treatment process, according to the results of sewage quality monitoring, chemicals are added to the sewage through the chemical addition port 26 to adjust the pH of the sewage or perform sterilization, so as to further make the sewage meet the standards for recycling.

[0085] Preferably, in this embodiment, the dosing valve may be a manual valve or an electric valve.

[0086] A pH adjuster or a bactericide etc. can be added through the drug adding port 26 .

[0087] Example 10

[0088] On the basis of the above embodiments, the present embodiment further includes a skid seat 5 and a control system 6, wherein the clean water suction system 1, the sewage suction system 2, the mixing system 3 and the control system 6 are respectively fixedly mounted on the skid seat 5, and the clean water suction system 1, the sewage suction system 2 and the mixing system 3 are respectively communicatively connected with the control system 6.

[0089] During processing, the operation of each system is controlled by the control system 6, with a high degree of automation and high operating efficiency; in addition, the various systems are integrated into one through the skid seat 5, with high integration and easy use.

[0090] Preferably, in this embodiment, the skid seat 5 is preferably a rectangular plate structure.

[0091] In addition, a frame is fixedly mounted on the sled 5 , and each system is located on the sled 5 and in the area enclosed by the frame and the sled 5 .

[0092] The working principle of the present invention is as follows:

[0093] During the treatment process, first, the clean water sent from the clean water distributor 11 is sent into the mixing system 3 through the clean water pump 12; at the same time, the sewage sent from the sewage distributor 21 is sent into the mixing system 3 through the sewage pump 22;

[0094] Then, the clean water and sewage are mixed through the mixing system 3 so that the sewage reaches the standard for reuse, and are discharged through the discharge system 4 for reuse, thereby saving resources and reducing costs.

[0095] Compared with the prior art, the present invention mainly has the following advantages:

[0096] 1) Based on the water demand for oil and gas field development, the present invention controls the concentration of negative effect ions through a cleaning and sewage mixing mode, and can meet the index control requirements of different sewage and different operating processes.

[0097] 2) High degree of automation, using automated feedback control technology to monitor and adjust water quality in real time according to different operating processes to ensure circulating water indicators and well operation fluid performance.

[0098] 3) The process is short, which effectively reduces the pressure of ion complexation, reverse osmosis and other systems in the water treatment system, reduces the amount of added chemicals, has low cost and high efficiency.

[0099] It should be noted that all electronic components involved in the present invention adopt the existing technology, and the above-mentioned components are electrically connected to the controller, and the control circuit between the controller and each component is the existing technology.

[0100] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0101] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0102] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic mixing device for oilfield sewage, characterized in that: The invention comprises a clean water suction system (1), a sewage suction system (2), a mixing system (3) and a discharge system (4); the clean water suction system (1) and the sewage suction system (2) are respectively connected to the mixing system (3) through pipelines, and the mixing system (3) is connected to the discharge system (4) through pipelines.

2. The automatic oilfield sewage mixing device according to claim 1 is characterized in that: The clean water intake system (1) comprises a clean water distributor (11) and a clean water pump (12); the water inlet of the clean water pump (12) is connected to the clean water distributor (11) through a pipeline, and the water outlet of the clean water pump (12) is connected to the mixing system (3) through a pipeline.

3. The automatic mixing device for oilfield sewage according to claim 2 is characterized in that: The clean water intake system (1) further comprises a clean water flow meter (13), wherein the clean water flow meter (13) is fixedly mounted on a pipeline connecting the clean water pump (12) and the mixing system (3).

4. The automatic mixing device for oilfield sewage according to claim 2 is characterized in that: The clean water intake system (1) further comprises a clean water quality monitoring unit (14), the water inlet of the clean water quality monitoring unit (14) being connected to the water outlet of the clean water pump (12) via a pipeline, and the water outlet of the clean water monitoring unit (14) being connected to the water inlet of the clean water pump (12) via a pipeline.

5. The automatic oilfield sewage mixing device according to any one of claims 1 to 4, characterized in that: The sewage suction system (2) comprises a sewage water distributor (21) and a sewage pump (22); the water inlet of the sewage pump (22) is connected to the sewage water distributor (21) through a pipeline, and the water outlet of the sewage pump (22) is connected to the mixing system (3) through a pipeline.

6. The automatic oilfield sewage mixing device according to claim 5 is characterized in that: The sewage suction system (2) further comprises a sewage flow meter (23), wherein the sewage flow meter (23) is fixedly mounted on a pipeline connecting the sewage pump (22) and the mixing system (3).

7. The automatic oilfield sewage mixing device according to claim 5 is characterized in that: The sewage suction system (2) further comprises a filter (25), wherein the filter (25) is fixedly mounted on a pipeline connecting the sewage pump (22) and the sewage water distributor (21).

8. The automatic oilfield sewage mixing device according to claim 5 is characterized in that: The sewage suction system (2) further comprises a sewage water quality monitoring unit (24), the water inlet of the sewage water quality monitoring unit (24) being connected to the water outlet of the sewage pump (22) via a pipeline, and the water outlet of the sewage water quality monitoring unit (24) being connected to the water inlet of the sewage pump (22) via a pipeline.

9. The automatic oilfield sewage mixing device according to claim 8, characterized in that: At least one dosing port (26) is provided on the pipeline communicating between the sewage pump (22) and the mixing system (3), and a dosing valve is fixedly installed at each dosing port (26).

10. The automatic oilfield sewage mixing device according to any one of claims 1 to 4, characterized in that: The invention also comprises a skid seat (5) and a control system (6), wherein the clean water suction system (1), the sewage suction system (2), the mixing system (3) and the control system (6) are respectively fixedly mounted on the skid seat (5), and the clean water suction system (1), the sewage suction system (2) and the mixing system (3) are respectively communicatively connected with the control system (6).

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