Pipeline coal slurry excess pressure energy recovery system and method

Abstract

The invention discloses a pipeline coal slurry excess pressure energy recovery system and method.The pipeline coal slurry excess pressure energy recovery system comprises a coal conveying pipeline, a turbine power station, a transmission, energy conversion power equipment and terminal equipment, and the system can conduct energy dissipation and pressure reduction on the excess pressure energy of coal slurry through the turbine power station; conveying the decompressed coal slurry to subsequent process equipment; subsequent process equipment can be an unpowered tubular spiral filtering concentrator, a coal slurry storage tank or terminal equipment such as various dehydration equipment. According to the method, the problem that a large amount of energy is consumed and wasted in the transportation process and the pressure relief dehydration process of the coal slurry conveyed by the pipeline in the prior art is solved, the residual pressure energy of the coal slurry in the pipeline behind the coal slurry conveying station is recycled and reused, and the problem of energy waste is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of excess pressure energy utilization, and in particular relates to a pipeline coal slurry excess pressure energy recovery system and method. Background Art

[0002] my country's coal resources are unevenly distributed, and coal production and consumption are highly dependent on transportation. In the late 1970s, relevant industrial departments advocated immediate development, but investment should be channeled separately and should not occupy the inherent investment share of mines and power plants; another voice believed that it was better to build more railways than to invest a large amount of money in risky pipelines. In this way, pipeline coal transportation technology stumbled forward and experienced twists and turns in constant controversy. Finally, the former State Planning Commission determined the principle of attracting foreign investment to develop and build coal transportation pipelines, and at the same time included pipeline coal transportation technology in the national "Sixth Five-Year Plan" and "Seventh Five-Year Plan" scientific and technological research projects. Subsequently, experts from various parties debated for several years on whether to choose "high-concentration water-coal slurry". It was not until the early 1990s that "conventional concentration" pipeline coal transportation entered normal development work. However, several planned coal pipelines came to an abrupt end due to various reasons.

[0003] China has the world's first and longest coal slurry pipeline, which is 727 kilometers long and transports about 10 million tons of raw coal annually. A booster station is set up every 100 kilometers on the pipeline. The booster station pressurizes the coal slurry through slurry pumps, diaphragm pumps, buffer tanks and other facilities, and then transports it to the next booster station through the pipeline. After arriving at the next booster station, the coal slurry is pumped into the coal slurry storage tank. The coal slurry in the pipeline has a very high pressure, while the storage tank is at normal pressure. There is a lot of pressure energy between the high pressure of the coal slurry and the normal pressure of the storage tank, which is not fully utilized.

[0004] After the coal slurry is transported to the site, it cannot be used directly because it contains a lot of water. It needs to remove the water before use. For example, the coal slurry transported by pipeline enters the buffer tank. The coal slurry in the buffer tank needs to be dehydrated by a filter press or centrifuge before being transported to the coal chemical plant for use. During the dehydration process of the filter press or centrifuge, the coal slurry needs to be transported and pressurized or the speed needs to be increased to achieve the purpose of dehydration. Summary of the invention

[0005] Based on the technical problems existing in the prior art, the present invention provides a pipeline coal slurry residual pressure energy recovery system and a method of using the system, which solves the problem in the prior art that a large amount of energy is consumed and wasted during the transportation and pressure relief and dehydration processes of pipeline coal slurry. The present invention recovers the residual pressure energy of the coal slurry in the pipeline after the coal slurry transportation station and reuses it, thus solving the problem of energy waste.

[0006] According to a first aspect of the technical solution of the present invention, the present invention provides a pipeline coal slurry residual pressure energy recovery system, which includes a coal transportation pipeline, a turbine power station, a transmission, an energy conversion power device and a terminal device; The coal conveying pipeline is used to convey the high-pressure coal slurry to the high-pressure coal slurry inlet of the turbine power station, and then enter the turbine power station; The turbine power station is used to receive high-pressure coal slurry transported by the coal pipeline. The high-pressure coal slurry drives the impeller of the turbine power station to rotate, thereby converting part of the pressure energy into mechanical energy for the rotation of the impeller; The transmission is connected to the output shaft of the turbine power station. The constant speed of the output shaft is adjusted through the speed change of the transmission. The speed of the transmission output shaft meets the speed requirements of the hydraulic pump, generator or air compressor screw pump of the hydraulic station; the energy conversion power equipment provides energy for the terminal equipment; the terminal equipment dehydrates and stores the low-pressure coal transported by the turbine power station.

[0007] Preferably, the coal transportation pipeline is connected to the turbine power station, the turbine power station is connected to the transmission, the transmission is connected to the energy conversion power equipment, and the turbine power station is connected to the terminal equipment.

[0008] Preferably, the energy conversion power station further includes a hydraulic station hydraulic pump, a generator and an air compressor screw pump.

[0009] Preferably, the terminal equipment further includes a coal slurry buffer tank, an unpowered tubular spiral filter concentrator and a dehydration device.

[0010] More preferably, the output shaft of the transmission is connected to the input shafts of the hydraulic station hydraulic pump, the generator, and the air compressor screw pump, the transmission receives the speed signal of the output shaft of the turbine power station, and the hydraulic station hydraulic pump receives the rotation speed signal of the output shaft of the transmission.

[0011] Furthermore, the generator receives a rotation speed signal of an output shaft of the transmission; and the air compressor screw pump receives a rotation speed signal of an output shaft of the transmission.

[0012] Furthermore, the turbine power station includes a high-pressure coal slurry inlet, a low-pressure coal slurry outlet, a power station impeller, an impeller output shaft, a lubrication system and a cooling system.

[0013] Preferably, the turbine power station is a single turbine or a twin turbine, the single turbine outputs mechanical energy, and the twin turbines output hydraulic energy.

[0014] Preferably, the impeller of the turbine power station is a single turbine, and the high-pressure coal slurry inlet is connected to the high-pressure coal slurry delivery pipeline, and the coal slurry is directly introduced into the turbine power station, driving the single turbine impeller to rotate at high speed. The single turbine impeller is connected to the impeller output shaft, thereby driving the impeller output shaft to rotate at high speed.

[0015] According to a second aspect of the technical solution of the present invention, the present invention provides a method for using a pipeline coal slurry residual pressure energy recovery system, which comprises the following steps: Step S1: The high-pressure coal slurry is transported to the high-pressure coal slurry inlet of the turbine power station through a pipeline, and the turbine power station reduces the pressure of the high-pressure coal slurry to form a low-pressure coal slurry; Step S2: the low-pressure coal slurry formed in step S1 is discharged from the low-pressure coal slurry outlet of the turbine power station, and then enters the low-pressure pipeline and is transported to the unpowered tubular spiral filter concentrator; Step W3: The turbine power station reduces the pressure of the high-pressure coal slurry to form a pressure difference. This pressure difference acts on the single turbine impeller to rotate it. The single turbine impeller and the impeller output shaft are connected together, so the impeller output shaft rotates together and generates a certain torque and speed; Therefore, the turbine power station converts the residual pressure energy into mechanical energy, and the converted mechanical energy is theoretically calculated to be 103 kWh; the impeller output shaft of the turbine power station has a certain speed, and the speed generated by the single turbine impeller and the impeller output shaft cannot directly drive the energy conversion power equipment; Step S4: the impeller output shaft of the turbine power station is connected to the transmission input shaft, and the output shaft of the transmission is connected to the energy conversion power device, and a suitable speed is formed after the conversion of the transmission, thereby driving the energy conversion power device, that is, the hydraulic station hydraulic pump, the generator and the air compressor screw pump to work normally; Step S5: The energy converted by the energy conversion power device is transmitted to the terminal device for use.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows: 1. The coal slurry of the present invention is pressurized by a pressure pump to increase the pressure of the coal slurry to about 13.0Mpa, and then transported to the next pressure station through a pipeline. The next pressure station receives the high-pressure coal slurry transported by the previous pressure station, first stores it in a coal slurry buffer tank, and then pressurizes it again by a pressure pump and transports it backward. Alternatively, a low-pressure pump is used to pump the coal slurry in the coal slurry buffer tank into a plate and frame filter press or a centrifuge for dehydration.

[0017] 2. The existing coal slurry transportation process does not recover the pressure of the coal slurry and enters the coal slurry buffer tank, forming a normal pressure coal slurry, resulting in a waste of coal slurry transportation pressure energy. The advantage of the present invention is to make full use of the pressure energy of the coal slurry, convert it into applicable hydraulic energy, electrical energy, and compressed air energy through the turbine power station, and then transport the converted energy to the back-end terminal equipment.

[0018] 3. The low-pressure coal slurry formed by the present invention then enters the coal slurry buffer tank; or the residual pressure energy is converted into hydraulic energy to drive an unpowered tubular spiral filter concentrator for dehydration and concentration, and the obtained low-pressure coal slurry is suitable for the needs of the unpowered tubular spiral filter concentrator; or the residual pressure energy is converted into electrical energy or compressed air energy and transported to dehydration equipment such as a plate and frame filter press and a centrifuge.

[0019] 4. The present invention fully recovers and utilizes the pressure of coal slurry transported by pipelines, and converts it into electric energy, compressed air energy, hydraulic energy, etc. required by the back-end terminal equipment, and the low-pressure coal slurry pressure discharged by turbine power is the coal slurry pressure required by the back-end equipment. Energy recovery and reuse are achieved, and energy-saving, green and environmentally friendly production is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall process framework of the pipeline coal slurry residual pressure energy recovery system according to the present invention; Figure 2 It is a schematic diagram of a coal slurry residual pressure energy dehydration process framework according to the pipeline coal slurry residual pressure energy recovery system of the present invention; Figure 3 It is a schematic diagram of the coal slurry residual pressure energy power generation process framework of the pipeline coal slurry residual pressure energy recovery system according to the present invention; Figure 4 It is a schematic diagram of the coal slurry residual pressure energy wind generation process framework of the pipeline coal slurry residual pressure energy recovery system according to the present invention; Figure 5-A It is a structural schematic diagram of a single turbine power station of a pipeline coal slurry residual pressure energy recovery system according to the present invention; Figure 5-B The pipeline coal slurry residual pressure energy recovery system of the present invention is Figure 5-A Schematic diagram of the section at the middle DD; Figure 6-A It is a schematic diagram of the structure of a dual-turbine power station of a pipeline coal slurry residual pressure energy recovery system according to the present invention; Figure 6-B It is a schematic diagram of a dual-turbine power station according to the pipeline coal slurry residual pressure energy recovery system of the present invention; Figure 6-C The pipeline coal slurry residual pressure energy recovery system of the present invention is Figure 6-A Schematic diagram of the middle CC section; Figure 6-D The pipeline coal slurry residual pressure energy recovery system of the present invention is Figure 6-A Schematic diagram of the middle BB section; Figure 7 The pipeline coal slurry residual pressure energy recovery system of the present invention is Figure 2 Schematic diagram of the process route for dehydration of medium coal slurry with residual pressure energy; Figure 8The pipeline coal slurry residual pressure energy recovery system of the present invention is Figure 3 Schematic diagram of the process route for power generation from residual pressure energy of coal slurry; Fig. 9 The pipeline coal slurry residual pressure energy recovery system of the present invention is Figure 4 Schematic diagram of the process route for wind generation using residual pressure energy of coal slurry; Fig.10 It is a three-dimensional structural schematic diagram of the air-making equipment of the pipeline coal slurry residual pressure energy recovery system according to the present invention; Fig.11 It is a schematic diagram of the connection structure of the air-making equipment of the pipeline coal slurry residual pressure energy recovery system according to the present invention; Fig.12 The invention relates to a wind-making device for a pipeline coal slurry residual pressure energy recovery system. Fig.11 Schematic diagram of some structures; Fig.13 The invention relates to a wind-making device for a pipeline coal slurry residual pressure energy recovery system. Fig.11 Schematic diagram of the local structure; Fig.14 It is a schematic diagram of the supporting structure of the air-making equipment of the pipeline coal slurry residual pressure energy recovery system according to the present invention; Fig.15 The invention relates to a wind-making device for a pipeline coal slurry residual pressure energy recovery system. Fig.14 Schematic diagram of the internal structure; Fig.16 It is a schematic diagram of the hoisting structure of the air-making equipment of the pipeline coal slurry residual pressure energy recovery system according to the present invention; Fig.17 The invention relates to a wind-making device for a pipeline coal slurry residual pressure energy recovery system. Fig.16 Enlarged view of point A.

[0021] Description of reference numerals in the accompanying drawings: 1. High-pressure coal slurry inlet; 2. High-pressure coal slurry outlet; 3. Single turbine impeller; 4. Impeller output shaft; 5. Single turbine power station housing; 6. High-pressure impeller; 7. Double turbine power station housing; 8. Low-pressure coal slurry outlet; 9. Low-pressure coal slurry inlet; 10. Low-pressure impeller; 11. Connecting shaft; 12. Transmission; 13. Hydraulic pump; 14. Hydraulic oil tank; 15. Turbine power station; 16. Hydraulic valve block; 17. Unpowered tubular spiral filter concentrator; 18. Hydraulic motor; 19. Generator; 20. Electric motor; 21. Air compressor screw pump; 22. Compressed air storage tank; 31. Bracket; 32. Instrument panel; 33. Buffer tank; 34. Connector; 35. Connecting structure; 501. Connecting pipe; 502. Connecting piece; 503. Slip ring; 504. Round rod; 50 5. Extrusion rod; 506. Fixed ring; 507. Connecting ring; 508. Clamping rod; 509. Notch; 510. Inclined groove; 511. Sliding rod; 512. Tension spring; 513. Connecting rail; 514. Limiting rod; 515. Swivel; 516. Turntable; 36. Support structure; 601. Fixed plate; 602. Connecting groove; 603. Adjusting rod; 604. Supporting ring; 605. Supporting rod; 606. Round plate; 607. Gasket; 608. Spring; 609. Connecting rod; 610. Inserting rod; 611. Mounting rod; 37. Lifting structure; 701. Fixed rod; 702. Sliding block; 703. Clamping block; 704. Housing; 705. Positioning rod; 706. Top block; 707. Round pad; 708. Top spring; 709. Auxiliary rod; 710. Sliding groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are 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.

[0023] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0025] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0026] The present invention discloses a pipeline coal slurry residual pressure energy recovery system and method, which includes a coal transportation pipeline, a turbine power station, a transmission, an energy conversion power device and a terminal device; the present invention can dissipate the residual pressure energy of the coal slurry through the turbine power station to reduce the pressure, and the decompressed coal slurry is transported to subsequent process equipment, and the subsequent process equipment can be an unpowered tubular spiral filter concentrator, or a coal slurry storage tank, or various terminal equipment such as dehydration equipment. The present invention solves the problem that a large amount of energy is consumed and wasted during the transportation process and the pressure relief and dehydration process of pipeline transportation of coal slurry in the prior art solution. The present invention recovers the residual pressure energy of the coal slurry in the pipeline after the coal slurry transportation station and reuses it, solving the problem of energy waste.

[0027] The coal slurry is reduced from high pressure to low pressure through the turbine power station. The resulting pressure difference can be converted into mechanical energy by the turbine power station and then transmitted to the transmission. The output shaft of the transmission is connected to the subsequent energy conversion power equipment, which can be a hydraulic pump, a screw pump of an air compressor, or a generator, so as to obtain the corresponding hydraulic energy, compressed air energy or electrical energy. After obtaining the corresponding energy, it is provided to the back-end terminal equipment, which includes coal slurry buffer tanks, non-powered tubular spiral filter concentrators and dehydration equipment.

[0028] Based on the first aspect of the present invention, a pipeline coal slurry residual pressure energy recovery system is provided, which further includes a coal conveying pipeline, a turbine power station, a transmission, an energy conversion power device and a terminal device. The coal conveying pipeline is connected to the turbine power station, the turbine power station is connected to the transmission, the transmission is connected to the energy conversion power device, and the turbine power station is connected to the terminal device.

[0029] The high-pressure coal slurry transported by the upper booster station through the coal pipeline is connected to the turbine power station through a pipeline. After the energy dissipation treatment of the turbine power station, the high-pressure coal slurry is converted into low-pressure coal slurry. The low-pressure coal slurry can be processed according to the original process. For example, the low-pressure coal slurry is introduced into the coal slurry buffer tank, and then pumped from the buffer tank to the filter press or centrifuge through the feed pump for dehydration treatment to obtain dry coal cakes or dry coal powder with low water content that can be used directly. The low-pressure coal slurry can also be directly sent to the unpowered tubular spiral filter concentrator for dehydration and concentration to obtain a low-water content coal slurry that can be used directly. The energy dissipation of the turbine power station can be set in two stages or in a single stage. No matter how many stages of turbine power stations are set, the pressure requirements of the subsequent process equipment for the coal slurry must be met. If the subsequent process is an unpowered tubular spiral filter concentrator, a first-stage turbine power station can be set to dissipate the coal slurry pressure from 13.0Mpa to 6.0Mpa. If the back-end terminal equipment is a dehydration device or a coal slurry buffer tank, the pressure of the first-stage turbine power station after energy dissipation can adapt to the pressure required by the corresponding equipment.

[0030] The following further describes a pipeline coal slurry residual pressure energy recovery system of the present invention in conjunction with the accompanying drawings. Figure 1-Figure 9 As shown, the present invention provides a pipeline coal slurry residual pressure energy recovery system, which includes a coal transportation pipeline, a turbine power station, a transmission, an energy conversion power equipment and a terminal device.

[0031] like Figure 1 As shown, the coal pipeline is connected to the high-pressure coal slurry inlet of the turbine power station, the turbine power station is connected to the coal pipeline, the transmission and the low-pressure coal slurry pipeline, and the turbine power station receives the pressure signal of the coal pipeline; the outlet of the low-pressure coal slurry pipeline is respectively connected to the coal slurry buffer tank, the unpowered tubular spiral filter concentrator and the dehydration equipment; the coal slurry buffer tank receives the low-pressure coal slurry signal output by the turbine power station; the unpowered tubular spiral filter concentrator receives the pressure signal of the low-pressure coal slurry of the turbine power station; the dehydration equipment receives the pressure signal of the low-pressure coal slurry output by the turbine power station; the output shaft of the turbine power station is connected to the input shaft of the transmission, further, the output shaft of the transmission is connected to the input shafts of the hydraulic pump of the hydraulic station, the generator and the air compressor screw pump, the transmission receives the speed signal of the output shaft of the turbine power station, the hydraulic pump of the hydraulic station receives the rotation speed signal of the output shaft of the transmission; the generator receives the rotation speed signal of the output shaft of the transmission; the air compressor screw pump receives the rotation speed signal of the output shaft of the transmission.

[0032] The coal pipeline is used to transport high-pressure coal slurry to the high-pressure coal slurry inlet of the turbine power station and then enter the turbine power station; specifically, the coal slurry or coal powder suspension is sent into the coal pipeline and the high pressure in the pipeline is used to push it forward.

[0033] The turbine power station is used to receive high-pressure coal slurry transported by the coal pipeline. The high-pressure coal slurry drives the impeller of the turbine power station to rotate, thereby converting part of the pressure energy into mechanical energy for the impeller rotation. After releasing part of the pressure energy, the coal slurry becomes low-pressure coal slurry, and then is output from the low-pressure coal slurry outlet of the turbine power station.

[0034] The transmission is connected to the output shaft of the turbine power station. The constant speed of the output shaft is adjusted through the speed change of the transmission. The speed of the transmission output shaft meets the speed requirements of the hydraulic station hydraulic pump, generator or air compressor screw pump.

[0035] The energy conversion power station further includes a hydraulic station hydraulic pump, a generator and an air compressor screw pump.

[0036] The input shaft of the hydraulic station hydraulic pump is connected to the output shaft of the transmission. The rotation of the output shaft of the transmission is transmitted to the rotation of the input shaft of the hydraulic station hydraulic pump, thereby driving the rotation of the hydraulic station hydraulic pump. Under the action of the hydraulic pump, the normal pressure hydraulic oil is pressurized to high pressure hydraulic oil, thereby realizing the conversion of mechanical energy into hydraulic energy.

[0037] The input shaft of the generator is connected to the output shaft of the transmission, and the generator is used to convert mechanical energy into electrical energy.

[0038] The input shaft of the air compressor screw pump is connected to the output shaft of the transmission. The air compressor screw pump is used to convert the rotational mechanical energy into the pressure energy of the air. The air compressor screw pump converts normal pressure air into high pressure air.

[0039] The terminal equipment further includes a coal slurry buffer tank, an unpowered tubular spiral filter concentrator and a dehydration device.

[0040] The coal slurry buffer tank is used to store low-pressure coal slurry transported by the low-pressure coal slurry pipeline. The coal slurry in the coal slurry buffer tank is at normal pressure.

[0041] The unpowered tubular spiral filter concentrator is mainly used to dehydrate coal slurry with a moisture content of 47%, reducing its moisture content to 30%.

[0042] The dehydration equipment removes the water in the coal slurry to obtain coal cakes or coal powder with low moisture content. The dehydration equipment is preferably a horizontal centrifuge, a plate and frame filter press or other equipment.

[0043] The turbine power station includes a high-pressure coal slurry inlet, a low-pressure coal slurry outlet, a power station impeller, an impeller output shaft, a lubrication system and a cooling system. The power station impeller can be a single turbine or a double turbine. A single turbine can output mechanical energy. A double turbine can output hydraulic energy.

[0044] like Figure 5-A Figure 5-BAs shown, the impeller of the turbine power station is a single turbine, and the high-pressure coal slurry inlet 1 is connected to the conveying pipeline of the high-pressure coal slurry. The coal slurry is directly introduced into the turbine power station 15, driving the single turbine impeller 3 to rotate at high speed. The single turbine impeller 3 is connected to the impeller output shaft 4, thereby driving the impeller output shaft 4 to rotate at high speed. The pressure energy is thus converted into mechanical energy. The high-speed rotating impeller output shaft 4 is connected to the transmission 12, and the speed and torque can be used by subsequent process equipment through the speed conversion of the transmission 12. The output shaft of the transmission 12 can be connected to the hydraulic pump of the hydraulic station, the screw pump of the air compressor, or the generator. If the pressure pump of the hydraulic station is connected, hydraulic energy can be obtained to drive actuators such as hydraulic motors or hydraulic cylinders. If the screw pump of the air compressor is connected, compressed air can be generated. If the generator is connected, electrical energy can be obtained. The lubrication system mainly provides lubricating oil for the parts that need to be lubricated in the turbine power station or process system. The lubrication system mainly lubricates the connecting shaft, the bearings of the hydraulic pump, the bearings of the generator, the bearings of the screw pump, the relevant gears of the transmission, and the places where the gap between the two parts is small and wear occurs. The cooling system is to provide cooling liquid to the parts that need to be cooled in the turbine power station or process system for cooling. In a preferred embodiment, the cooling system is mainly used to cool the hydraulic oil or other parts that need to be cooled. The single turbine power station housing 5 is arranged outside the single turbine power station.

[0045] like Figure 6-A Figure 6-D As shown, the impeller of the turbine power station is a twin turbine, and the impeller is divided into a high-pressure turbine chamber and a low-pressure turbine chamber. The high-pressure turbine chamber and the low-pressure turbine chamber are connected by a coupling or a connecting shaft. When the twin-turbine power station is working, two working media are introduced at the same time, one is high-pressure coal slurry and the other is low-pressure working medium. The high-pressure coal slurry is introduced into the high-pressure turbine chamber of the power station, driving the high-pressure turbine to rotate, and then discharged from the discharge port of the high-pressure turbine chamber. The rotation of the high-pressure turbine drives the low-pressure turbine to rotate through a coupling or a connecting shaft. The low-pressure working medium is introduced at the inlet of the low-pressure turbine chamber and enters the low-pressure turbine chamber. Due to the rotation of the low-pressure turbine, the low-pressure working medium obtains kinetic energy and forms pressure energy, thereby increasing the pressure of the low-pressure working medium, and then is discharged from the discharge port of the low-pressure turbine chamber.

[0046] The twin-turbine power station impeller includes a high-pressure coal slurry inlet 1, a high-pressure coal slurry outlet 2, a high-pressure impeller 6, a twin-turbine power station casing 7, a low-pressure coal slurry outlet 8, a low-pressure coal slurry inlet 9, a low-pressure impeller 10, and a connecting shaft 11. The twin-turbine power station casing 7 is arranged outside the twin-turbine power station, the high-pressure coal slurry outlet 2 is connected to the connecting shaft 11, the connecting shaft 11 is connected to the low-pressure coal slurry inlet 9, and the high-pressure coal slurry inlet 1 is connected to the low-pressure coal slurry outlet 8. One end of the connecting shaft 11 is connected to the high-pressure impeller 6 and the other end is connected to the low-pressure impeller 10, so that the high-pressure impeller 6 and the low-pressure impeller 10 maintain the same rotation speed. Figure 6-CAs shown, the high-pressure impeller 6 is disc-shaped with blades evenly distributed. These blades are generally streamlined to reduce fluid resistance and improve supercharging efficiency. The central part of the high-pressure impeller 6 is connected to the drive shaft of the twin-turbine power station, and the impeller is driven to rotate at high speed through the rotation of the shaft. Figure 6-D As shown, the low-pressure impeller 10 is disc-shaped and has a series of curved blades evenly distributed. In a preferred embodiment, the bending angle of the blades is any angle between 10° and 40°. Furthermore, in this embodiment, the bending angle of the blades is any angle between 20° and 30°.

[0047] According to the second aspect of the present invention, Figure 1 As shown, a pipeline coal slurry residual pressure energy recovery method is provided, comprising the following steps: Step S1: The high-pressure coal slurry is transported to the high-pressure coal slurry inlet 1 of the turbine power station 15 through a pipeline, and the turbine power station 15 reduces the pressure of the high-pressure coal slurry to form a low-pressure coal slurry.

[0048] Step S2: The low-pressure coal slurry formed in step S1 is discharged from the low-pressure coal slurry outlet 2 of the turbine power station, and then enters the low-pressure pipeline and is transported to the unpowered tubular spiral filter concentrator 17.

[0049] Step W3: The turbine power station reduces the pressure of the high-pressure coal slurry to form a pressure difference. The pressure difference acts on the single turbine impeller 3 to rotate it. The single turbine impeller 3 and the impeller output shaft 4 are connected together, so the impeller output shaft 4 rotates together and generates a certain torque and speed.

[0050] Therefore, the turbine power station converts the residual pressure energy into mechanical energy, and the converted mechanical energy is theoretically calculated to be 103 kWh. The impeller output shaft 4 of the turbine power station 15 has a certain rotation speed. The rotation speed generated by the single turbine impeller 3 and the impeller output shaft 4 cannot directly drive the energy conversion power device.

[0051] Step S4: The impeller output shaft 4 of the turbine power station is connected to the input shaft of the transmission 12, and the output shaft of the transmission 12 is connected to the energy conversion power device. After the conversion of the transmission 12, a suitable speed is formed to drive the energy conversion power device, that is, the hydraulic station hydraulic pump, generator and air compressor screw pump to work normally. Step S5: The energy converted by the energy conversion power device is transmitted to the terminal device for use.

[0052] In another specific implementation, the present invention provides a pipeline coal slurry residual pressure energy recovery dehydration system and process. In a preferred embodiment, the coal slurry residual pressure energy is converted into hydraulic energy for dehydration, and the rear-end terminal equipment is an unpowered tubular spiral filter concentrator.

[0053] like Figure 2 and Figure 7As shown, a pipeline coal slurry residual pressure energy recovery and dehydration system includes a transmission 12, a hydraulic pump 13, a hydraulic oil tank 14, a turbine power station 15, a hydraulic valve block 16, an unpowered tubular spiral filter concentrator 17 and a hydraulic motor 18. The high-pressure coal slurry transported from the upper pressure station through the coal pipeline is connected to the turbine power station 15 through a pipeline. The turbine power station 15 converts the high-pressure coal slurry into low-pressure coal slurry and discharges it through the low-pressure coal slurry outlet 2, and then enters the low-pressure pipeline and is transported to the unpowered tubular spiral filter concentrator 17. The unpowered tubular spiral filter concentrator 17 dehydrates the low-pressure coal slurry and converts the low-pressure coal slurry into concentrated coal slurry, which is transported to the coal chemical plant through the aisle; the turbine power station 15 is connected to the transmission 12, and the residual pressure energy generated by the pressure reduction is converted into mechanical energy and transmitted to the transmission 12. The transmission 12 is connected to the hydraulic pump 13, and the energy flow generated by the hydraulic pump 13 is transmitted to the hydraulic station, and the energy flow of the hydraulic station is transmitted to the unpowered tubular spiral filter concentrator 17, thereby driving the operation of the unpowered tubular spiral filter concentrator 17.

[0054] A pipeline coal slurry residual pressure energy recovery and dehydration method comprises the following steps: Step W1: Flow rate is 40m 3 / h, the high-pressure coal slurry with a pressure of 13.0Mpa is transported to the high-pressure coal slurry inlet 1 of the turbine power station 15 through a pipeline, and the turbine power station 15 reduces the pressure of the high-pressure coal slurry from 13.0Mpa to 6.0Mpa to form a low-pressure coal slurry.

[0055] Step W2: The low-pressure coal slurry formed in step W1 is discharged from the low-pressure coal slurry outlet 2 of the turbine power station, and then enters the low-pressure pipeline and is transported to the unpowered tubular spiral filter concentrator 17.

[0056] Step W3: The turbine power station reduces the pressure of the high-pressure coal slurry to form a pressure difference. The pressure difference acts on the single turbine impeller 3 to rotate it. The single turbine impeller 3 and the impeller output shaft 4 are connected together, so the impeller output shaft 4 rotates together and generates a certain torque and speed.

[0057] Therefore, the turbine power station will set the flow rate in step W1 to 40m 3 / h, the high-pressure coal slurry with a pressure of 13.0Mpa is reduced to 6.0MPa, and the residual pressure can be converted into mechanical energy. The converted mechanical energy is theoretically calculated to be 103 kWh. The impeller output shaft 4 of the turbine power station 15 has a certain speed. The speed generated by the single turbine impeller 3 and the impeller output shaft 4 cannot directly drive the energy conversion power equipment.

[0058] Step W4: The impeller output shaft 4 of the turbine power station is connected to the transmission 12. The rotation speed generated by the impeller output shaft 4 is converted by the transmission to form a rotation speed that can directly drive the hydraulic pump 13, so that the hydraulic pump 13 rotates normally.

[0059] Step W5: The inlet of the hydraulic pump 13 is connected to the outlet of the hydraulic oil tank 14, and the outlet of the hydraulic pump 13 is connected to the hydraulic valve block 16. The hydraulic valve block 16 transports the hydraulic oil to the hydraulic motor 18 connected to the hydraulic valve block 16 after changing the direction, pressure and flow rate, and drives the hydraulic motor 18 to rotate forward or reverse.

[0060] Step W6: After the hydraulic motor 18 has done work, the hydraulic oil passes through the hydraulic valve block 16 and then flows back to the hydraulic oil tank 14. The hydraulic motor 18 is connected to the unpowered tubular spiral filter concentrator 17, thereby driving the unpowered tubular spiral filter concentrator 17 to work.

[0061] Step W7: The oil pressure of the hydraulic oil tank 14 is normal pressure. After the action of the hydraulic pump 13, the pressure of the hydraulic oil can be increased to 16.0 MPa to form high-pressure hydraulic oil. Then the hydraulic motor 18 is driven to rotate at a speed of 10 r / min-20 r / min, and can be steplessly adjusted through the hydraulic valve block 16.

[0062] Step W8: The output torque of the hydraulic motor 18 reaches 300,000 Nm. The unpowered tubular spiral filter concentrator 17 works normally under the drive of the hydraulic motor 18, and dehydrates the low-pressure coal slurry delivered, and the filtrate formed after dehydration is discharged, and the dehydrated coal slurry is formed into a concentrated coal slurry, which is then transported to the coal chemical plant for reuse.

[0063] In another specific implementation, the present invention provides a pipeline coal slurry residual pressure energy recovery power generation system and process thereof. In a preferred embodiment, the process of converting the residual pressure energy of the coal slurry into electrical energy, the rear-end terminal equipment is a non-powered tubular spiral filter concentrator or a coal slurry buffer tank or other dehydration equipment. In a preferred embodiment, the rear-end terminal equipment is a non-powered tubular spiral filter concentrator.

[0064] like Figure 3 and Figure 8As shown, a pipeline coal slurry residual pressure energy recovery power generation system includes a transmission 12, a turbine power station 15, a non-powered tubular spiral filter thickener 17, a generator 19 and a motor 20. The high-pressure coal slurry transported from the upper pressure station through the coal pipeline is connected to the turbine power station 15 through a pipeline. The turbine power station 15 converts the high-pressure coal slurry into low-pressure coal slurry and discharges it through the low-pressure coal slurry outlet 2, and then enters the low-pressure pipeline and is transported to the non-powered tubular spiral filter thickener 17. The non-powered tubular spiral filter thickener 17 dehydrates the low-pressure coal slurry and converts the low-pressure coal slurry into a concentrated coal slurry. The concentrated coal slurry is transported to the coal chemical plant through the aisle; the turbine power station 15 is connected to the transmission 12, and the residual pressure energy generated by the pressure reduction is converted into mechanical energy and transmitted to the transmission 12. The transmission 12 is connected to the generator 19, and the energy flow generated by the generator 19 is transmitted to the non-powered tubular spiral filter thickener 17, thereby driving the operation of the non-powered tubular spiral filter thickener 17.

[0065] A pipeline coal slurry residual pressure energy recovery power generation method, comprising the following steps: Step A1: Flow rate is 40m 3 / h, the high-pressure coal slurry with a pressure of 13.0Mpa is transported to the high-pressure coal slurry inlet 1 of the turbine power station 15 through a pipeline, and the turbine power station 15 reduces the pressure of the high-pressure coal slurry from 13.0Mpa to 6.0Mpa to form a low-pressure coal slurry.

[0066] Step A2: The low-pressure coal slurry formed in step W1 is discharged from the low-pressure coal slurry outlet 2 of the turbine power station, and then enters the low-pressure pipeline and is transported to the unpowered tubular spiral filter concentrator 17.

[0067] Step A3: The turbine power station reduces the pressure of the high-pressure coal slurry to form a pressure difference. The pressure difference acts on the single turbine impeller 3 to rotate it. The single turbine impeller 3 and the impeller output shaft 4 are connected together, so the impeller output shaft 4 rotates together and generates a certain torque and speed.

[0068] Therefore, the turbine power station will be 40m 3 / h, the high-pressure coal slurry with a pressure of 13.0Mpa is reduced to 6.0MPa, and the residual pressure can be converted into mechanical energy. The converted mechanical energy is theoretically calculated to be 103 kWh. The impeller output shaft 4 of the turbine power station 15 has a certain speed. The speed generated by the single turbine impeller 3 and the impeller output shaft 4 cannot directly drive the energy conversion power equipment.

[0069] Step A4: The impeller output shaft 4 of the turbine power station is connected to the input shaft of the transmission 12, and the output shaft of the transmission 12 is connected to the input shaft of the generator 19. After the conversion of the transmission 12, a suitable speed is formed, thereby driving the generator 19 to work normally.

[0070] Step A5: The generator 19 generates electricity, and the generated electric energy is transmitted to the unpowered tubular spiral filter concentrator 17 for use. The unpowered tubular spiral filter concentrator can be driven by the hydraulic motor 18 in the above dehydration process, or by the electric motor 20. If it is the electric motor 20, the electric energy generated by the generator 19 can drive the electric motor 20 to work, thereby driving the unpowered tubular spiral filter concentrator 17 to work. The low-pressure coal slurry transmitted is dehydrated, and the filtrate formed after dehydration is discharged. The dehydrated coal slurry forms a concentrated coal slurry, and the concentrated coal slurry is then transported to the coal chemical plant for reuse.

[0071] In another specific implementation, the present invention provides a pipeline coal slurry residual pressure energy recovery wind making system and process thereof. In a preferred embodiment, the coal slurry residual pressure energy is converted into hydraulic energy for wind making process, and the rear-end terminal equipment is a non-powered tubular spiral filter concentrator or a coal slurry buffer tank or other dehydration equipment. In a preferred embodiment, the rear-end terminal equipment is a non-powered tubular spiral filter concentrator.

[0072] like Figure 4 and Fig. 9 As shown, a pipeline coal slurry residual pressure energy recovery wind system includes a transmission 12, a turbine power station 15, an unpowered tubular spiral filter concentrator 17, a hydraulic motor 18, an air compressor screw pump 21 and a compressed air storage tank 22. The high-pressure coal slurry transported from the upper booster station through the coal pipeline is connected to the turbine power station 15 through a pipeline. The turbine power station 15 converts the high-pressure coal slurry into low-pressure coal slurry and discharges it through the low-pressure coal slurry outlet 2, and then enters the low-pressure pipeline and is transported to the unpowered tubular spiral filter concentrator 17. The unpowered tubular spiral filter concentrator 17 dehydrates the low-pressure coal slurry and converts the low-pressure coal slurry into concentrated coal slurry, which is transported to the coal chemical plant through the aisle; the turbine power station 15 is connected to the transmission 12, and the residual pressure energy generated by the pressure reduction is converted into mechanical energy and transmitted to the transmission 12. The transmission is connected to the air compressor screw pump 21. When the air compressor screw pump 21 is working, it converts air into compressed air, which is then stored in the compressed air storage tank 22. When the unpowered tubular spiral filter concentrator 17 needs compressed air, it can be transported from the compressed air storage tank 22 for use.

[0073] A method for generating wind by recovering excess pressure energy of coal slurry in a pipeline comprises the following steps: Step B1: Flow rate is 40m 3 / h, the high-pressure coal slurry with a pressure of 13.0Mpa is transported to the high-pressure coal slurry inlet 1 of the turbine power station 15 through a pipeline, and the turbine power station 15 reduces the pressure of the high-pressure coal slurry from 13.0Mpa to 6.0Mpa to form a low-pressure coal slurry.

[0074] Step B2: The low-pressure coal slurry formed in step B1 is discharged from the low-pressure coal slurry outlet 2 of the turbine power station, and then enters the low-pressure pipeline and is transported to the unpowered tubular spiral filter concentrator 17.

[0075] Step B3: The turbine power station reduces the pressure of the high-pressure coal slurry to form a pressure difference. The pressure difference acts on the single turbine impeller 3 to rotate it. The single turbine impeller 3 and the impeller output shaft 4 are connected together, so the impeller output shaft 4 rotates together and generates a certain torque and speed.

[0076] Therefore, the turbine power station will be 40m 3 / h, the high-pressure coal slurry with a pressure of 13.0Mpa is reduced to 6.0MPa, and the residual pressure can be converted into mechanical energy. The converted mechanical energy is theoretically calculated to be 103 kWh. The impeller output shaft 4 of the turbine power station 15 has a certain speed. The speed generated by the single turbine impeller 3 and the impeller output shaft 4 cannot directly drive the energy conversion power equipment.

[0077] Step B4: The impeller output shaft 4 of the turbine power station is connected to the input shaft of the transmission 12, and the output shaft of the transmission 12 is connected to the input shaft of the air compressor screw pump 21. After the conversion of the transmission 12, a suitable speed is formed, thereby driving the air compressor screw pump 21 to work normally.

[0078] Step B5: The compressed air outlet of the spiral pump is connected to the compressed air storage tank 22, and the compressed air storage tank 22 is connected to the unpowered tubular spiral filter concentrator 17. When the air compressor screw pump 21 is working, it converts air into compressed air, which is then stored in the compressed air storage tank 22. When the unpowered tubular spiral filter concentrator 17 needs compressed air, it can be transported from the compressed air storage tank 22 for use. The drive of the unpowered tubular spiral filter concentrator can be the hydraulic motor 18 in the above-mentioned dehydration process, or it can be the electric motor 20. Regardless of which drive device is used, the corresponding driving force can be configured to drive the unpowered tubular spiral filter concentrator 17 to work. The low-pressure coal slurry transported is dehydrated, and the filtrate formed after dehydration is discharged. The dehydrated coal slurry forms a concentrated coal slurry, and the concentrated coal slurry is then transported to the coal chemical plant for reuse.

[0079] like Figure 10-17As shown, a pipeline coal slurry residual pressure energy recovery system and method further include a pipeline coal slurry residual pressure energy recovery wind making equipment and process, including a turbine power station, a transmission, an air compressor screw pump, an unpowered tubular spiral filter concentrator, a buffer tank 33 and a coal chemical industry, the turbine power station includes a high-pressure coal slurry inlet, a high-pressure coal slurry outlet, a single turbine impeller, an impeller output shaft and a single turbine power station housing 704, the lower end of the buffer tank 33 is fixedly connected to three brackets 31, the arc surface of the buffer tank 33 is installed with an instrument panel 32, and the arcs on both sides of the buffer tank 33 The surfaces are all fixedly connected with connecting parts 34, the transmission is connected to the turbine power station, the transmission is connected to the air compressor screw pump, the air compressor screw pump is connected to the buffer tank 33, the buffer tank 33 is connected to the unpowered tubular spiral filter concentrator, the unpowered tubular spiral filter concentrator is connected to the turbine power station, the unpowered tubular spiral filter concentrator is connected to the coal chemical industry, the arc surface of the connecting part 34 is provided with a connecting structure 35, the arc surfaces on both sides of the buffer tank 33 are provided with supporting structures 36, and the upper end of the buffer tank 33 is provided with a lifting structure 37.

[0080] The transmission connects the output shaft of the turbine power station and the input shaft of the air compressor screw pump. The transmission receives the speed signal of the output shaft of the turbine power station; the turbine power station connects the coal pipeline, the transmission and the low-pressure coal slurry pipeline, or the turbine power station receives the pressure signal of the coal pipeline; the air compressor screw pump connects the transmission, or the air compressor screw pump receives the rotation speed signal of the output shaft of the transmission; the unpowered tubular spiral filter concentrator connects the low-pressure coal slurry pipeline, or the unpowered tubular spiral filter concentrator receives the pressure signal of the low-pressure coal slurry of the turbine power station; the coal chemical industry connects the concentrated coal slurry pipeline, or the coal chemical industry receives the concentrated slurry signal of the unpowered tubular spiral filter concentrator; the compressed air buffer tank 33 connects the air compressor screw pump and the air inlet interface of the unpowered tubular spiral filter concentrator, or the compressed air buffer tank 33 receives the compressed air signal delivered by the air compressor screw pump.

[0081] The specific configuration and functions of the connection structure 35 , the support structure 36 , and the hoisting structure 37 will be described in detail below.

[0082] like Figures 11 to 13As shown, the connection structure 35 includes a fixed ring 506, which is fixedly connected to the connecting member 34. The inner wall of the fixed ring 506 is slidably connected to a plurality of round rods 504, and one end of the round rod 504 away from the fixed ring 506 is fixedly connected to a slip ring 503. The arc surface of the fixed ring 506 is fixedly connected to a plurality of connecting rails 513, and the inner wall of the connecting rail 513 is slidably connected to a sliding rod 511, and one end of the sliding rod 511 away from the fixed ring 506 is fixedly connected to an extrusion rod 505, and the extrusion rod 505 is slidably connected to the fixed ring 506. The arc surface of the connecting member 34 is slidably connected to a connecting ring 507, and the arc surface of the connecting member 34 is fixedly connected to a rotating ring 515, and the arc surface of the rotating ring 515 is rotatably connected to a rotating disk 516, and the connecting ring 507 is close to the rotating disk A plurality of clamping rods 508 are fixedly connected to one side of 516, a plurality of notches 509 are provided on the side of the rotating disk 516 close to the clamping rod 508, a tension spring 512 is provided between the rotating ring 515 and the connecting ring 507, and the two ends of the tension spring 512 are fixedly connected to the rotating ring 515 and the connecting ring 507 respectively, a connecting piece 502 is slidably connected to the circular arc surface of the round rod 504, and a connecting tube 501 is fixedly connected to the side of the connecting piece 502 away from the connecting member 34, and a plurality of inclined grooves 510 are provided on the inner wall of the rotating disk 516, and the inclined grooves 510 are slidably connected to the sliding rod 511. When the connecting tube 501 and the connecting member 34 need to be connected, the connecting tube 501 is pulled to move, and the connecting tube 501 drives the connecting piece 502 to move, and the connecting tube 501 drives the sliding ring 503 moves, the slip ring 503 drives the round rod 504 to move, then the round rod 504 is aligned with the connecting piece 502 and the connecting piece 34, then the round rod 504 is inserted into the connecting piece 34 and the connecting piece 502, then the round rod 504 is inserted into the fixing ring 506, then the connecting ring 507 is pulled to move, the connecting ring 507 drives the clamping rod 508 to separate from the notch 509, the connecting ring 507 drives the tension spring 512 to stretch, then the turntable 516 is rotated to move, the turntable 516 drives the inclined slot 510 to move, the inclined slot 510 drives the sliding rod 511 to move, the sliding rod 511 slides on the inner wall of the connecting rail 513, the sliding rod 511 drives the extrusion rod 505 to move, and the extrusion rod 505 is on the fixing ring 506. The inner wall of the connecting rail 513 slides, and then the extrusion rod 505 squeezes and fixes the round rod 504, and then the connecting ring 507 is loosened and the tension spring 512 is contracted to drive the clamping rod 508 to be clamped into the groove 509 for fixation, thereby completing the connection between the connecting tube 501 and the connecting piece 34. The internal fixed connection of the connecting rail 513 is limited by the limiting rod 514, and the limiting rod 514 is slidably connected with the sliding rod 511. The limiting rod 514 can limit the sliding rod 511 to prevent the slider 702 from deviating when sliding on the inner wall of the connecting rail 513, thereby improving the sliding stability of the sliding rod 511. The cross-section of the round rod 504 is circular, and the round rod 504 is a stainless steel rod. The stainless steel material can increase the service life of the round rod 504 and prevent the round rod 504 from rusting during use.

[0083] The entire connection structure 35 can facilitate quick installation and connection between the connection piece 34 on the buffer tank 33 and the connecting pipe 501 , and can also improve efficiency when installing or removing the connecting pipe 501 .

[0084] like Fig.14 and Fig.15 As shown, the support structure 36 includes a fixed plate 601, which is fixedly connected to the buffer tank 33. The inner wall of the fixed plate 601 is provided with two connection grooves 602. The inner wall of the connection groove 602 is rotatably connected with an adjusting rod 603. The inner wall of the adjusting rod 603 is slidably connected with a mounting rod 611. The upper end of the mounting rod 611 is fixedly connected with a circular plate 606. The lower end of the mounting rod 611 is fixedly connected with a gasket 607. The arc surface of the mounting rod 611 is movably connected with a connecting rod 609. The ends of the two connecting rods 609 that are close to each other are rotatably connected with a support rod 605. The support rod 605 The upper end is fixedly connected with a support ring 604, and the lower surface of the circular plate 606 is fixedly connected with a plurality of plug rods 610, and the plurality of plug rods 610 are slidably connected with the connecting rod 609 and the adjusting rod 603. The arc surface of the installation rod 611 is sleeved with a spring 608, and the two ends of the spring 608 are respectively fixedly connected with the gasket 607 and the adjusting rod 603. When it is necessary to support different positions of the connecting tube 501, the circular plate 606 is pulled to move, and the circular plate 606 drives the installation rod 611 to move, and the installation rod 611 moves inside the connecting rod 609 and the adjusting rod 603, and the installation The rod 611 drives the gasket 607 to move, the gasket 607 drives the spring 608 to contract, the disc drives the insertion rod 610 to move, and then the insertion rod 610 is separated from the connecting rod 609 and the adjusting rod 603, and then the support rod 605 is pulled to move, the support rod 605 drives the connecting rod 609 to move, the connecting rod 609 drives the adjusting rod 603 to move, and the adjusting rod 603 rotates on the inner wall of the connecting groove 602. After moving to the appropriate position, the insertion rod 610 is aligned with the adjusting rod 603 and the connecting rod 609, and then the gasket 607 and the spring 608 are released. 08 contracts to drive the insertion rod 610 to insert the fixing rod 701, and then the support rod 605 and the support ring 604 support the connecting tube 501. The cross-section of the mounting rod 611 is circular, and the mounting rod 611 is a stainless steel rod. The mounting rod 611 can limit the spring 608 to prevent the spring 608 from being deformed during use, thereby increasing the service life of the spring 608. The cross-section of the support ring 604 is circular, and the support ring 604 is a rubber ring. The rubber material can provide certain protection for the connecting tube 501 to avoid wear when the connecting tube 501 is supported and fixed.

[0085] The effect achieved by the entire support structure 36 is that it can conveniently support different positions of the connecting tube 501, thereby preventing the connecting tube 501 from falling due to its own weight and the weight of the fluid when in use.

[0086] like Fig.16 and Fig.17 As shown, the hoisting structure 37 includes a fixing rod 701, the fixing rod 701 is fixedly connected to the buffer tank 33, the upper end of the fixing rod 701 is fixedly connected to a positioning rod 705, the upper end of the positioning rod 705 is fixedly connected to a clamping block 703, the arc surface of the positioning rod 705 is slidably connected to a slider 702, the arc surface of the clamping block 703 is slidably connected to a shell 704, the inner wall of the shell 704 is provided with a plurality of slide grooves 710, the inner wall of the slide groove 710 is slidably connected to a top block 706, the top block 706 abuts against the clamping block 703, the interior of the slide groove 710 is provided with a top spring 708, the two ends of the top spring 708 are respectively connected to the top block 706 and the shell 704 The auxiliary rod 709 is fixedly connected to the side of the top block 706 away from the block 703, and the auxiliary rod 709 is slidably connected to the shell 704. The top spring 708 is sleeved on the arc surface of the auxiliary rod 709. When the buffer tank 33 needs to be hoisted and moved, the shell 704 connected to the hoisting device is pulled to move, and then the shell 704 is aligned with the block 703 and the slider 702, and then the shell 704 is sleeved on the block 703, and then the block 703 squeezes the top block 706, and the top block 706 slides on the inner wall of the slide groove 710, and the top block 706 drives the top spring 708 to contract, and the top block 706 drives the auxiliary rod 709 slides on the inner wall of the shell 704, and after moving to the appropriate position, the top spring 708 is stretched to drive the top block 706 to abut and fix with the clamping block 703, so as to hoist the buffer tank 33. When it is necessary to separate the shell 704 from the clamping block 703, the shell 704 is further moved downward, and the shell 704 drives the top block 706 to move downward, and then the top block 706 abuts with the slider 702, and the slider 702 drives the top block 706 to slide on the inner wall of the slide groove 710, and the top block 706 drives the top spring 708 to stretch. When it moves to the bottom of the slider 702, the top spring 708 stretches and drives the slider 70 2 abuts against the top block 706, and then moves the shell 704 upward, the top block 706 drives the slider 702 to slide on the arc surface of the positioning rod 705, when the slider 702 abuts and fixes with the clamping block 703, the top block 706 slides toward the inside of the slide groove 710, and then continues to pull the shell 704 upward to drive the top block 706 to separate from the slider 702 and the clamping block 703, and the end of the auxiliary rod 709 away from the top block 706 is fixedly connected with a round pad 707, which is a stainless steel pad. The round pad 707 can prevent the auxiliary rod 709 from falling off from the shell 704, thereby greatly improving the stability of the auxiliary rod 709.

[0087] The entire hoisting structure 37 has the effect of facilitating the hoisting of the buffer tank 33 and preventing the buffer tank 33 from being difficult to connect during hoisting.

[0088] S1. Transmission, describe the function or purpose of the transmission: the transmission is connected to the output shaft of the turbine power station. The speed of the output shaft is constant. Through the speed change adjustment of the transmission, the speed of the transmission output shaft meets the speed requirements of the hydraulic pump, generator or air compressor screw pump of the hydraulic station. Turbine power station, describe the function or purpose of the turbine power station: the turbine power station is used to receive high-pressure coal slurry, which drives the impeller of the turbine power station to rotate, thereby converting part of the pressure energy into the mechanical energy of the impeller rotation. After releasing part of the pressure energy, the coal slurry becomes low-pressure coal slurry, and then outputs from the low-pressure coal slurry outlet of the turbine power station. Air compressor screw pump, describe the function or purpose of the air compressor screw pump: the input shaft of the air compressor screw pump is connected to the output shaft of the transmission. It is used to convert the mechanical energy of rotation into the pressure energy of air and convert normal pressure air into high-pressure air. Unpowered tubular spiral filter concentrator, describe the function or purpose of the unpowered tubular spiral filter concentrator: it is mainly used to dehydrate coal slurry with a water content of 47% to reduce its water content to 30%. Compressed air buffer tank 33, describe the function or purpose of compressed air buffer tank 33: used to transport high-pressure compressed air produced by the air compressor screw pump to the compressed air buffer tank 33. Used for storage and standby. Coal chemical industry is the process of using coal as raw material, converting coal into gas, liquid and solid products or semi-products through chemical processing, and then further processing them into chemical and energy products. Describe the function or purpose of coal chemical industry: receive the low-water content coal slurry output by the unpowered tubular spiral filter concentrator, and convert the coal slurry into other products by chemical means.

[0089] S2. When the connecting tube 501 and the connecting piece 34 need to be connected, the connecting tube 501 is pulled to move, the connecting tube 501 drives the connecting piece 502 to move, the connecting tube 501 drives the slip ring 503 to move, the slip ring 503 drives the round rod 504 to move, and then the round rod 504 is aligned with the connecting piece 502 and the connecting piece 34, and then the round rod 504 is inserted into the connecting piece 34 and the connecting piece 502, and then the round rod 504 is inserted into the fixing ring 506, and then the connecting ring 507 is pulled to move, and the connecting ring 507 drives the clamping rod 508 to separate from the notch 509, and the connecting ring 507 is pulled to move. 07 drives the tension spring 512 to stretch, and then rotates the turntable 516 to move, the turntable 516 drives the inclined slot 510 to move, the inclined slot 510 drives the slide bar 511 to move, the slide bar 511 slides on the inner wall of the connecting rail 513, the slide bar 511 drives the extrusion rod 505 to move, the extrusion rod 505 slides on the inner wall of the fixing ring 506, and then the extrusion rod 505 squeezes and fixes the round rod 504, and then releases the connecting ring 507. The tension spring 512 shrinks and drives the clamping rod 508 to be clamped into the slot 509 for fixation, thereby completing the connection between the connecting tube 501 and the connecting piece 34.

[0090] S3. When it is necessary to support different positions of the connecting tube 501, pull the circular plate 606 to move, the circular plate 606 drives the mounting rod 611 to move, the mounting rod 611 moves inside the connecting rod 609 and the adjusting rod 603, the mounting rod 611 drives the gasket 607 to move, the gasket 607 drives the spring 608 to contract, the circular plate drives the insertion rod 610 to move, and then the insertion rod 610 is separated from the connecting rod 609 and the adjusting rod 603, and then the support is pulled. Rod 605 moves, support rod 605 drives connecting rod 609 to move, connecting rod 609 drives adjusting rod 603 to move, adjusting rod 603 rotates on the inner wall of connecting groove 602, and after moving to the appropriate position, the insertion rod 610 is aligned with adjusting rod 603 and connecting rod 609, and then gasket 607 is loosened and spring 608 is contracted to drive the insertion rod 610 to be inserted to fix rod 701, and then support rod 605 and support ring 604 support connecting tube 501.

[0091] S4. When the buffer tank 33 needs to be hoisted and moved, the shell 704 connected to the hoisting device is pulled to move, and then the shell 704 is aligned with the block 703 and the slider 702, and then the shell 704 is put on the block 703, and then the block 703 squeezes the top block 706, and the top block 706 slides on the inner wall of the slide groove 710, and the top block 706 drives the top spring 708 to contract, and the top block 706 drives the auxiliary rod 709 to slide on the inner wall of the shell 704. After moving to the appropriate position, the top spring 708 is stretched to drive the top block 706 to abut and fix with the block 703, and then the buffer tank 33 is hoisted. When the shell 704 needs to be separated from the block 703, the shell 704 is further Continue to move downward, the shell 704 drives the top block 706 to move downward, and then the top block 706 abuts against the slider 702, the slider 702 drives the top block 706 to slide on the inner wall of the slide groove 710, and the top block 706 drives the top spring 708 to stretch. When moving to the bottom of the slider 702, the top spring 708 stretches and drives the slider 702 to abut against the top block 706, and then the shell 704 is moved upward, the top block 706 drives the slider 702 to slide on the arc surface of the positioning rod 705, and when the slider 702 abuts and fixes with the card block 703, the top block 706 slides toward the inside of the slide groove 710, and then the shell 704 is pulled upward to drive the top block 706 to separate from the slider 702 and the card block 703.

[0092] The overall working principle is that the transmission connects the output shaft of the turbine power station and the input shaft of the air compressor screw pump. The transmission receives the speed signal of the output shaft of the turbine power station; the turbine power station connects the coal pipeline, the transmission and the low-pressure coal slurry pipeline, or the turbine power station receives the pressure signal of the coal pipeline; the air compressor screw pump connects the transmission, or the air compressor screw pump receives the rotation speed signal of the output shaft of the transmission; the unpowered tubular spiral filter concentrator connects the low-pressure coal slurry pipeline, or the unpowered tubular spiral filter concentrator receives the pressure signal of the low-pressure coal slurry of the turbine power station; the coal chemical industry connects the concentrated coal slurry pipeline, or the coal chemical industry receives the concentrated slurry signal of the unpowered tubular spiral filter concentrator; the compressed air buffer tank 33 connects the air compressor screw pump and the air inlet interface of the unpowered tubular spiral filter concentrator, or the compressed air buffer tank 33 receives the compressed air signal delivered by the air compressor screw pump.

[0093] When it is necessary to connect the connecting tube 501 and the connecting piece 34, pull the connecting tube 501 to move, the connecting tube 501 drives the connecting piece 502 to move, the connecting tube 501 drives the slip ring 503 to move, the slip ring 503 drives the round rod 504 to move, and then align the round rod 504 with the connecting piece 502 and the connecting piece 34, and then insert the round rod 504 into the connecting piece 34 and the connecting piece 502, and then insert the round rod 504 into the fixing ring 506, and then pull the connecting ring 507 to move, the connecting ring 507 drives the clamping rod 508 to separate from the notch 509, the connecting ring 507 drives the tension spring 512 to stretch, and then rotate the turntable 516 to move, the turntable 516 drives the inclined slot 510 to move, and the inclined slot 510 with The movable slide bar 511 moves, and the slide bar 511 slides on the inner wall of the connecting rail 513. The slide bar 511 drives the extrusion rod 505 to move, and the extrusion rod 505 slides on the inner wall of the fixing ring 506. Then the extrusion rod 505 squeezes and fixes the round rod 504, and then the connecting ring 507 is released. The tension spring 512 shrinks and drives the clamping rod 508 to be clamped into the groove 509 for fixation, thereby completing the connection between the connecting tube 501 and the connecting member 34. The limiting rod 514 can limit the slide bar 511 to prevent the slider 702 from deviating when sliding on the inner wall of the connecting rail 513, thereby improving the sliding stability of the slide bar 511. The stainless steel material can increase the service life of the round rod 504 and prevent the round rod 504 from rusting during use.

[0094] When it is necessary to support different positions of the connecting tube 501, the circular plate 606 is pulled to move, and the circular plate 606 drives the installation rod 611 to move, and the installation rod 611 moves inside the connecting rod 609 and the adjusting rod 603, and the installation rod 611 drives the gasket 607 to move, and the gasket 607 drives the spring 608 to contract, and the circular plate drives the insertion rod 610 to move, and then the insertion rod 610 is separated from the connecting rod 609 and the adjusting rod 603, and then the support rod 605 is pulled to move, and the support rod 605 drives the connecting rod 609 to move, and the connecting rod 609 drives the adjusting rod 603 to move, and the adjusting rod 603 is adjusted. The section rod 603 rotates on the inner wall of the connecting groove 602. After moving to the appropriate position, the insertion rod 610 is aligned with the adjustment rod 603 and the connecting rod 609. Then the gasket 607 is loosened and the spring 608 is contracted to drive the insertion rod 610 to be inserted into the fixing rod 701. Then the support rod 605 and the support ring 604 support the connecting tube 501. The installation rod 611 can limit the spring 608 to prevent the spring 608 from being deformed when it is used again, thereby increasing the service life of the spring 608. The rubber material can provide certain protection for the connecting tube 501 to prevent wear when the connecting tube 501 is supported and fixed.

[0095] When it is necessary to hoist and move the buffer tank 33, pull the shell 704 connected to the hoisting device to move, then align the shell 704 with the block 703 and the slider 702, then put the shell 704 on the block 703, and then the block 703 squeezes the top block 706, and the top block 706 slides on the inner wall of the slide groove 710, and the top block 706 drives the top spring 708 to contract, and the top block 706 drives the auxiliary rod 709 to slide on the inner wall of the shell 704. After moving to the appropriate position, the top spring 708 is stretched to drive the top block 706 to abut and fix with the block 703, and then the buffer tank 33 is hoisted. When it is necessary to separate the shell 704 from the block 703, the shell 704 continues to move downward, and the shell 704 drives the top block 706 to move downward. When the outer shell 704 is moved upward, the top block 706 drives the slider 702 to slide on the inner wall of the slide groove 710, and the top block 706 drives the top spring 708 to stretch. When it moves to the bottom of the slider 702, the top spring 708 stretches to drive the slider 702 to abut against the top block 706, and then the outer shell 704 is moved upward. The top block 706 drives the slider 702 to slide on the arc surface of the positioning rod 705. When the slider 702 is abutted and fixed with the card block 703, the top block 706 slides toward the inside of the slide groove 710, and then the outer shell 704 is continued to be pulled upward to drive the top block 706 to separate from the slider 702 and the card block 703. The round pad 707 can prevent the auxiliary rod 709 from falling off from the outer shell 704, thereby greatly improving the stability of the auxiliary rod 709.

[0096] In summary, a process for recovering and reusing the residual pressure energy of coal slurry transported by pipeline, high-pressure coal slurry is converted into low-pressure coal slurry by turbine power, and the low-pressure coal slurry enters the terminal equipment at the rear end for dehydration or storage for standby use. The pressure difference of the coal slurry can be converted into mechanical energy by the turbine power station, and then adjusted to a suitable speed by the transmission speed regulation to drive the energy conversion power device. Thus, the mechanical energy is converted into corresponding hydraulic energy, electrical energy, and compressed air energy. The obtained hydraulic energy, electrical energy, and compressed air energy are then delivered to the terminal equipment at the rear end. The high-pressure coal slurry is input into the turbine power station, and the high-pressure coal slurry is converted into low-pressure coal slurry by the action of the turbine power station, thereby forming pressure difference energy, which is converted into mechanical energy for the rotation of the output shaft by the turbine power station. The pressure of the low-pressure coal slurry after passing through the turbine power station can adapt to the required coal slurry pressure of the rear-end terminal equipment to recover the residual pressure energy to the greatest extent. The rotational mechanical energy output by the turbine power station is adjusted to a suitable output speed by the transmission to drive the corresponding hydraulic pump, air compressor screw pump, generator and other corresponding energy conversion power equipment. The hydraulic energy, electrical energy and compressed air converted by the energy conversion power equipment can be delivered to the back-end terminal equipment for use. The back-end terminal equipment can be a coal slurry storage tank, a non-powered tubular spiral filter concentrator or other dehydration equipment, such as a plate and frame filter press. The energy conversion power equipment can be a hydraulic pump, a generator and an air compressor screw pump. The turbine power station converts the residual pressure energy into mechanical energy, which drives different equipment, such as a hydraulic station hydraulic pump, an air compressor screw pump or other power equipment such as a generator.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pipeline coal slurry residual pressure energy recovery system, characterized in that: It includes coal pipelines, turbine power stations, transmissions, energy conversion power equipment and terminal equipment; The coal conveying pipeline is used to convey the high-pressure coal slurry to the high-pressure coal slurry inlet of the turbine power station, and then enter the turbine power station; The turbine power station is used to receive high-pressure coal slurry transported by the coal pipeline. The high-pressure coal slurry drives the impeller of the turbine power station to rotate, thereby converting part of the pressure energy into mechanical energy for the rotation of the impeller; The transmission is connected to the output shaft of the turbine power station. The constant speed of the output shaft is adjusted through the speed change of the transmission. The speed of the transmission output shaft meets the speed requirements of the hydraulic station hydraulic pump, generator or air compressor screw pump; Energy conversion power equipment provides energy to terminal equipment; The terminal equipment dehydrates and stores the low-pressure coal transported by the turbine power station.

2. The pipeline coal slurry residual pressure energy recovery system according to claim 1 is characterized in that: The coal transportation pipeline is connected to the turbine power station, the turbine power station is connected to the transmission, the transmission is connected to the energy conversion power equipment, and the turbine power station is connected to the terminal equipment.

3. The pipeline coal slurry residual pressure energy recovery system according to claim 1, characterized in that: The energy conversion power station further includes a hydraulic station hydraulic pump, a generator and an air compressor screw pump.

4. The pipeline coal slurry residual pressure energy recovery system according to claim 1, characterized in that: The terminal equipment further includes a coal slurry buffer tank, an unpowered tubular spiral filter thickener and a dehydration device.

5. The pipeline coal slurry residual pressure energy recovery system according to claim 1, characterized in that: The output shaft of the transmission is connected to the input shafts of the hydraulic station hydraulic pump, the generator, and the air compressor screw pump. The transmission receives the speed signal of the output shaft of the turbine power station, and the hydraulic station hydraulic pump receives the rotation speed signal of the output shaft of the transmission.

6. The pipeline coal slurry residual pressure energy recovery system according to claim 5, characterized in that: The generator receives a rotation speed signal of the output shaft of the transmission; and the air compressor screw pump receives a rotation speed signal of the output shaft of the transmission.

7. The pipeline coal slurry residual pressure energy recovery system according to claim 1, characterized in that: The turbine power station includes a high-pressure coal slurry inlet, a low-pressure coal slurry outlet, a power station impeller, an impeller output shaft, a lubrication system and a cooling system.

8. The pipeline coal slurry residual pressure energy recovery system according to claim 7, characterized in that: The turbine power station has a single turbine or a twin turbine. The single turbine outputs mechanical energy, while the twin turbines output hydraulic energy.

9. The pipeline coal slurry residual pressure energy recovery system according to claim 8, characterized in that: The impeller of the turbine power station is a single turbine. The high-pressure coal slurry inlet is connected to the high-pressure coal slurry delivery pipeline, and the coal slurry is directly introduced into the turbine power station, driving the single turbine impeller to rotate at high speed. The single turbine impeller is connected to the impeller output shaft, thereby driving the impeller output shaft to rotate at high speed.

10. A method for using a pipeline coal slurry residual pressure energy recovery system, characterized in that: It includes the following steps: Step S1: The high-pressure coal slurry is transported to the high-pressure coal slurry inlet of the turbine power station through a pipeline, and the turbine power station reduces the pressure of the high-pressure coal slurry to form a low-pressure coal slurry; Step S2: the low-pressure coal slurry formed in step S1 is discharged from the low-pressure coal slurry outlet of the turbine power station, and then enters the low-pressure pipeline and is transported to the unpowered tubular spiral filter concentrator; Step W3: The turbine power station reduces the pressure of the high-pressure coal slurry to form a pressure difference. This pressure difference acts on the single turbine impeller to rotate it. The single turbine impeller and the impeller output shaft are connected together, so the impeller output shaft rotates together and generates a certain torque and speed; Therefore, the turbine power station converts the residual pressure energy into mechanical energy, and the converted mechanical energy is theoretically calculated to be 103 kWh; the impeller output shaft of the turbine power station has a certain speed, and the speed generated by the single turbine impeller and the impeller output shaft cannot directly drive the energy conversion power equipment; Step S4: the impeller output shaft of the turbine power station is connected to the transmission input shaft, and the output shaft of the transmission is connected to the energy conversion power device, and a suitable speed is formed after the conversion of the transmission, thereby driving the energy conversion power device, that is, the hydraulic station hydraulic pump, the generator and the air compressor screw pump to work normally; Step S5: The energy converted by the energy conversion power device is transmitted to the terminal device for use.

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