Powerful cleaning device and method in pipe

Abstract

The invention discloses a powerful cleaning device and method in a pipe. The powerful cleaning device comprises a water inlet, a tank body, solid particles, an ejector, a solid particle adjusting valve, a screen, a pressure pump, a pump adjusting valve, a water outlet, a lower sewage draining exit, an upper sewage draining exit, an ejector outlet adjusting valve and a control system. A physical mode is adopted, online cleaning can be carried out on the interiors of various existing heat exchangers such as vertical and horizontal shell-and-tube heat exchangers, coil heat exchangers, spiral tube (plate) heat exchangers, plate heat exchangers and winding tube heat exchangers, and the online cleaning device can also be applied to online cleaning of dirt of tubular membranes and plate membranes; and long-term, stable and efficient operation of the equipment can be ensured.

Description

Technical Field

[0001] The present invention belongs to an in-pipe dirt cleaning device and method, and is widely used to solve the problems of in-pipe pollution and scaling in heat exchangers, boilers, tubular membranes, etc. It can clean the inner wall of the pipes of the above-mentioned equipment online, prevent and remove the attachment and scaling of pollutants in the pipes of the above-mentioned equipment, and ensure the normal operation of the above-mentioned equipment with high efficiency in a long cycle. Background Art

[0002] Heat exchangers, boilers, and tubular membranes are widely used in many industries such as water treatment, chemical engineering, and energy. However, with the increase in the service time, there will inevitably be dirt blockage and adhesion on the inner wall of the pipes of the above-mentioned equipment. Due to the dirt blockage and adhesion inside and on the surface of the pipes, the working efficiency and water quality of the above-mentioned equipment are reduced, the resistance increases, the energy consumption increases, affecting the normal operation of the equipment. Seriously, it is necessary to stop the machine for cleaning, and a large amount of cleaning wastewater needs to be treated during cleaning, which increases the investment in wastewater treatment equipment and treatment costs. Developing a cleaning device that can perform online self-cleaning without generating sewage wastewater can improve the working efficiency of the above-mentioned equipment, effectively extend the operation time of the device, reduce energy consumption, reduce the generation of wastewater, save water resources, and has great economic benefits.

[0003] To solve the in-pipe pollution of horizontal shell-and-tube heat exchangers, people have developed physical cleaning technologies such as rubber ball circulating cleaning devices, in-pipe wire twist cleaning devices, and brush reciprocating cleaning devices, as well as some chemical agent cleaning technologies. These technologies are only suitable for certain specific equipment and conditions. For example, the above-mentioned physical cleaning technologies are only suitable for in-pipe cleaning of shell-and-tube heat exchangers, and the shape of the pipes must be round pipes; they are powerless against the in-pipe pollution of coiled heat exchangers, boilers, spiral plate heat exchangers, spiral tube heat exchangers, small-diameter pipes, square pipes, elliptical pipes and other special-shaped pipes, have strict requirements for the processing accuracy of the tube bundles, and need to specially process corresponding cleaning components for pipes of different diameters, with high costs and strict application requirements, and cannot meet the need for cleaning the inner walls of pipes of various diameters in various places.

[0004] To solve the deficiencies of the existing cleaning devices, a strong in-pipe cleaning device and method have been invented. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a strong in-pipe cleaning device and method, which can be used for cleaning pollutants in the pipes of horizontal heat exchangers, vertical heat exchangers, coiled heat exchangers, boilers, spiral tubes, spiral plate heat exchangers, tubular membranes and other equipment, and can maintain the normal operation of the above-mentioned equipment in a long cycle and operate efficiently.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows:

[0007] A strong pipe cleaning device and method of the present invention comprises a water inlet 1, a tank body 2, solid particles 3, an injector 4, a solid particle regulating valve 5, a screen 6, a pressure pump 7, a pump regulating valve 8, a water outlet 9, a lower sewage outlet 10, an upper sewage outlet 11, an injector outlet regulating valve 12 and a control system. Its characteristics are: the tank body 2 is of a vertical structure, and the volume of the tank body is 1 - 2 times greater than the volume of the pipeline to be cleaned including the connecting components; the suction port of the injector 4 is connected to the solid particles 3 at the top of the tank body 2, the water inlet of the injector is connected to the water outlet of the pressure pump 7, and the water outlet of the injector 4 is connected to the pipeline and equipment to be cleaned; the specific gravity of the solid particles 3 is less than 1, and the volume of the solid particles is 0.5 - 1.5 times the volume of the pipeline to be cleaned; the water inlet 1 is connected to the tank body 2 below the solid particles 3, and the other end is connected to the equipment and pipeline to be cleaned; the water outlet 9 is connected to the tank body 2 below the water inlet 1, and the other end is connected to the pressure pump 7 or other pipelines; the screen 6 is at the upper part of the tank body 2, and the aperture of the screen 6 is smaller than the particle size of the solid particles; the upper sewage outlet 11 is at the top of the tank body 2, and the lower sewage outlet 10 is at the bottom of the tank body 2.

[0008] The described strong pipe cleaning device and method are characterized in that; under the dual actions of the buoyancy of the solid particles and the suction force generated by the injector under the action of the pressure pump, the solid particles enter the injector, are pressurized and then enter the equipment to be cleaned from the outlet of the injector. Under the action of water power, the fluid containing solid particles flows out from the outlet of the equipment to be cleaned, then enters the tank body 2 from the water inlet 1, and the solid particles 3 float up under the action of buoyancy and are ready to participate in the next cycle.

[0009] The described strong pipe cleaning device and method are characterized in that; the cleaning intensity inside the pipe is determined by comprehensive factors such as controlling the flow rate of the fluid inside the pipe, the content of solid particles, the selection of solid particles, and the flow state of the fluid inside the pipe.

[0010] The beneficial effects of the present invention: it can be used for the development of new products and the reconstruction of existing equipment in use, can realize on-line non-stop self-cleaning of the equipment, and ensure the long-term, efficient and continuous operation of the equipment. Description of the Drawings

[0011] Figure 1 It is a general structure schematic diagram of the strong pipe cleaning device and method described in the present invention.

[0012] Figure 2 It is a general structure schematic diagram of the application of the strong pipe cleaning device and method described in the present invention on a horizontal shell and tube heat exchanger.

[0013] Figure 3 It is a general structure schematic diagram of the application of the strong pipe cleaning device and method described in the present invention on a vertical shell and tube heat exchanger.

[0014] Figure 4Schematic diagram of the overall structure of the application of a strong pipe internal cleaning device and method according to the present invention to a spiral tube heat exchanger, a coil tube heat exchanger, and a spiral plate heat exchanger.

[0015] Figure 5 Schematic diagram of the overall structure of the application of a strong pipe internal cleaning device and method according to the present invention to a coil type steam boiler.

[0016] Figure 6 Schematic diagram of the overall structure of the application of a strong pipe internal cleaning device and method according to the present invention to a tubular membrane filtration system.

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] As shown in the attached Figure 1 , it is a schematic diagram of the overall structure of a strong pipe internal cleaning device and method according to the present invention. As Figure 1 shown, connect the water inlet 1 of this device to a pipe orifice of the equipment to be cleaned, and then connect the ejector outlet regulating valve 12 of this device to another pipe orifice of the equipment to be cleaned to form a closed-loop circuit. During operation, open the solid particle regulating valve 5, the pump regulating valve 8, and the ejector outlet regulating valve 12, and start the pressure pump 7. Under the action of the pump, the ejector 4 generates a suction effect to suck the solid particles 3 in the tank body 2, increase the pressure, and then enter the connected equipment through the ejector outlet regulating valve 12. The solid particles collide and rub against the inner wall of the equipment pipe frequently as the water flows in the equipment, achieving the purpose of cleaning the dirt on the inner wall of the pipe. As the water continues to flow, the mixture of solid particles and water flows out of the other end of the equipment and enters the tank body 2 of this device through the water outlet 1 and undergoes separation. The solid particles and substances lighter than water, such as oil, will move upward under the action of buoyancy. After the solid particles are intercepted by the screen 6, they enter the ejector through the suction port of the ejector 4 to participate in the next cycle, and the oil will move to the top of the tank body and be discharged from the tank body irregularly through the upper sewage discharge valve 11; substances heavier than water move downward to the bottom of the tank body under the action of gravity and are discharged from the tank body irregularly through the lower sewage discharge valve 10. The water flows through the water outlet 9, the pump regulating valve 8, enters the pressure pump 7 to increase the pressure, and then enters the ejector 4. After sucking the solid particles in the ejector, it enters the equipment to be cleaned again, thus completing the cyclic cleaning of the equipment to be cleaned.

[0019] As shown in the attached Figure 2 , it is a schematic diagram of the overall structure of the application of a strong pipe internal cleaning device and method according to the present invention to a horizontal shell and tube heat exchanger. As Figure 2 shown, connect the water inlet 1 of this device to the water outlet of the horizontal shell and tube heat exchanger, make the water outlet 9 of this device become the connection between the water outlet of the horizontal shell and tube heat exchanger and the water outlet of the system, connect the ejector outlet regulating valve 12 to the water inlet of the horizontal shell and tube heat exchanger, and connect the water inlet of the pressure pump 7 to the water inlet pipeline through the pump regulating valve 8.

[0020] The working process of the present invention is as follows Open the solid particle regulating valve 5, the pump regulating valve 8, and the ejector outlet regulating valve 12, and start the pressurizing pump 7. Under the action of the pump, the ejector 4 generates a suction effect to suck the solid particles 3 in the tank body 2, increase the pressure, and then inject them into the water inlet pipe of the horizontal tube-in-tube heat exchanger. After mixing with the water in the pipe, they enter the heat exchanger together. During the process of the solid particles flowing in the heat exchanger tubes along with the water flow, they frequently touch and rub against the inner wall of the heat exchange tubes, achieving the purpose of cleaning the dirt on the inner wall of the heat exchange tubes. And after flowing through all the heat exchange tubes with the water flow, they flow out from the water outlet of the horizontal tube-in-tube heat exchanger, enter the tank body 2 of this device through the water inlet 1. Since the specific gravity of the solid particles 3 is lighter than that of water, the solid particles 3 move upward under the action of buoyancy to the suction port of the ejector 4 to prepare for another cycle, while the water flow flows out of the tank body 2 through the water outlet 9 and enters the water outlet pipe of the system. Thus, the cleaning of the horizontal tube-in-tube heat exchanger is completed, and this cleaning can be carried out continuously in an on-line cycle.

[0021] As shown in the appendix Figure 3 , it is the overall structural schematic diagram of the application of the in-tube strong cleaning device and method described in the present invention on a vertical tube-in-tube heat exchanger. As shown in Figure 3 As shown, the water inlet 1 of this device is connected to the water outlet of the vertical tube-in-tube heat exchanger, the water outlet 9 of this device becomes the connection between the water outlet of the vertical tube-in-tube heat exchanger and the water outlet of the system, the ejector outlet regulating valve 12 is communicated with the water inlet of the vertical tube-in-tube heat exchanger, and the water inlet of the pressurizing pump 7 is connected to the water inlet pipe through the pump regulating valve 8.

[0022] The working process of the present invention is as follows Open the solid particle regulating valve 5, the pump regulating valve 8, and the ejector outlet regulating valve 12, and start the pressurizing pump 7. Under the action of the pump, the ejector 4 generates a suction effect to suck the solid particles 3 in the tank body 2, increase the pressure, and then inject them into the water inlet pipe of the vertical tube-in-tube heat exchanger. After mixing with the water in the pipe, they enter the heat exchanger together. During the process of the solid particles flowing in the heat exchanger tubes along with the water flow, they frequently touch and rub against the inner wall of the heat exchange tubes, achieving the purpose of cleaning the dirt on the inner wall of the heat exchange tubes. And after flowing through all the heat exchange tubes with the water flow, they flow out from the water outlet of the vertical tube-in-tube heat exchanger, enter the tank body 2 of this device through the water inlet 1. Since the specific gravity of the solid particles 3 is lighter than that of water, the solid particles 3 move upward under the action of buoyancy to the suction port of the ejector 4 to prepare for another cycle, while the water flow flows out of the tank body 2 through the water outlet 9 and enters the water outlet pipe of the system. Thus, the cleaning of the vertical tube-in-tube heat exchanger is completed, and this cleaning can be carried out continuously in an on-line cycle.

[0023] As shown in the appendix Figure 4, which is the overall structural schematic diagram of the application of the in-tube powerful cleaning device and method of the present invention on a spiral tube heat exchanger, a coil heat exchanger, and a spiral plate heat exchanger. As Figure 4 shown, the water inlet 1 of this device is connected to the water outlet of one of the spiral tube heat exchanger, the coil heat exchanger, and the spiral plate heat exchanger. The water outlet 9 of this device becomes the connection between the water outlet of one of the spiral tube heat exchanger, the coil heat exchanger, and the spiral plate heat exchanger and the water outlet of the system. The ejector outlet regulating valve 12 is communicated with the water inlet of one of the spiral tube heat exchanger, the coil heat exchanger, and the spiral plate heat exchanger. The water inlet of the pressurizing pump 7 is connected to the water inlet pipe through the pump regulating valve 8.

[0024] The working process of the present invention is as follows Open the solid particle regulating valve 5, the pump regulating valve 8, and the ejector outlet regulating valve 12, and start the pressurizing pump 7. Under the action of the pump, the ejector 4 generates a suction effect to suck the solid particles 3 in the tank body 2, increase the pressure, and inject them into the water inlet pipe of one of the spiral tube heat exchanger, the coil heat exchanger, and the spiral plate heat exchanger. After mixing with the water in the pipe, they enter the heat exchanger together. During the process of the solid particles flowing in the heat exchanger tube along with the water flow, they frequently touch and rub against the inner wall of the heat exchange tube, achieving the purpose of cleaning the dirt on the inner wall of the heat exchange tube. And after flowing through all the heat exchange tubes with the water flow, they flow out from the water outlet of the heat exchanger, enter the tank body 2 of this device through the water inlet 1. Since the specific gravity of the solid particles 3 is lighter than that of water, the solid particles 3 move upward under the action of buoyancy to the suction port of the ejector 4 to prepare for another cycle, while the water flow flows out of the tank body 2 through the water outlet 9 and enters the water outlet pipe of the system. Thus, the cleaning of the spiral tube heat exchanger, the coil heat exchanger, and the spiral plate heat exchanger is completed, and this cleaning can be carried out continuously in an online cycle.

[0025] As shown in the appendix Figure 5 , which is the overall structural schematic diagram of the application of the in-tube powerful cleaning device and method of the present invention on a coil-type steam boiler. As Figure 5 shown, the water inlet 1 of this device is connected to the water inlet of the coil-type steam boiler, and then the ejector outlet regulating valve 12 of this device is connected to the steam outlet pipe of the coil-type steam boiler to form a closed-loop circuit.

[0026] The working process of the present invention is as follows Close the inlet valve and the steam outlet valve of the original coil steam boiler, keep the coil steam boiler in a full water state, open the solid particle regulating valve 5, the pump regulating valve 8, and the ejector outlet regulating valve 12, and start the pressure pump 7; under the action of the pump, the ejector 4 generates a suction effect to suck the solid particles 3 in the tank body 2 into the coil of the coil steam boiler after pressurization and injection. During the flow of the solid particles along with the water flow in the coil, they frequently touch and rub against the inner wall of the coil, achieving the purpose of cleaning the dirt on the inner wall of the coil. And after flowing through all the coils with the water flow, it flows out from the water inlet of the coil steam boiler, enters the tank body 2 of this device through the water inlet 1. Since the specific gravity of the solid particles 3 is lighter than that of water, the solid particles 3 move upward under the action of buoyancy to the suction port of the ejector 4 to prepare for another cycle, while the water flow flows out of the tank body 2 through the water outlet 9 and enters the outlet pipeline of the system. Thus, the cleaning of the coil steam boiler is completed, and this cleaning can be carried out irregularly.

[0027] As shown in the Figure 6 accompanying drawing, it is the overall structural schematic diagram of the application of the in-pipe powerful cleaning device and method described in the present invention on a tubular membrane filtration system. As Figure 6 shown, the water inlet 1 of this device is connected to the circulating upper water outlet on the tubular membrane filtration system, and then the ejector outlet regulating valve 12 of this device is connected to the circulating lower water inlet on the tubular membrane filtration system to form a closed-loop circuit; the feed pump of the original tubular membrane filtration system is connected to the water outlet 9 of this device.

[0028] The working process of the present invention is as follows Open the valve on the circulation pipeline of the tubular membrane filtration system and turn on the feed water pump; open the solid particle regulating valve 5, the pump regulating valve 8, and the ejector outlet regulating valve 12 of this device, and start the pressure pump 7; under the action of the pump, the ejector 4 generates a suction effect to suck the solid particles 3 in the tank body 2, increase the pressure and then inject them into the tubular membrane filtration system. During the flow of the solid particles along with the water in the tubular membrane filtration system, they frequently come into contact with and rub against the inner wall of the tubular membrane. In this way, the attached pollutants on the inner surface of the tubular membrane can be removed, and the reformation of pollutants can be prevented, achieving the purpose of cleaning the dirt on the inner wall of the tubular membrane. As the water continues to flow, the solid particles, together with the water and the mixture, enter the tank body 2 of this device from the other end of the tubular membrane filtration system through the water outlet 1 and are separated. The solid particles and substances lighter than water, such as oil, will move upward under the action of buoyancy. After the solid particles are intercepted by the screen 6, they enter the ejector through the suction port of the ejector 4 to participate in the next cleaning cycle. The oil will move to the top of the tank and be discharged from the tank through the upper drain valve 11 irregularly; substances heavier than water will move downward to the bottom of the tank under the action of gravity and be discharged from the tank through the lower drain valve 10 irregularly. The water flow passes through the water outlet 9 and the pump regulating valve 8, enters the pressure pump 7 to increase the pressure, and then enters the ejector 4. After sucking the solid particles in the ejector, it enters the tubular membrane filtration system again. In this way, the cyclic cleaning of the inner wall of the tubular membrane is completed; this cleaning can be carried out continuously in an online cycle or can be carried out irregularly for cleaning.

Claims

1. A strong in-pipe cleaning device and method, comprising a water inlet, a tank body, solid particles, an injector, a solid particle regulating valve, a screen, a pressure pump, a pump regulating valve, a water outlet, a lower sewage outlet, an upper sewage outlet, an injector outlet regulating valve and a control system; characterized in that: The tank body is of a vertical structure, and the volume of the tank body is 1-2 times larger than the volume of the equipment pipeline to be cleaned including the connecting parts; the water inlet of the injector is connected to the water outlet of the pressure pump 7, the water outlet of the injector is connected to the pipeline and equipment to be cleaned, the material suction port of the injector is connected to the solid particles at the top of the tank body, and the solid particles enter the injector under the vacuum action generated by the high-speed fluid jet of the injector, are pressurized and then enter the equipment to be cleaned from the outlet of the injector. Inside the equipment to be cleaned, the dirt on the inner wall of the pipe is removed by frequent collision and friction with the inner wall of the pipe, and the dirt is prevented from staying on the inner wall. After the solid particles flow out of the equipment to be cleaned and enter the tank body, they move upward to the material suction port of the injector by buoyancy and then participate in the next cleaning cycle; the specific gravity of the solid particles is less than 1, the particle size is 0.05-1.2 mm, and the volume of the solid particles is 0.1-1.5 times the volume of the cleaning pipeline; the water inlet 1 is connected to the tank body below the solid particles and the other end is connected to the equipment and pipeline to be cleaned; the water outlet is connected to the tank body below the water inlet and the other end is connected to the pressure pump or other pipelines; the sieve is at the upper part of the tank body, and the aperture of the sieve is smaller than the particle size of the solid particles; the upper sewage outlet is at the top of the tank body, and the lower sewage outlet is at the bottom of the tank body.

2. The internal pipe high-pressure cleaning device and method according to claim 1, characterized in that: The high-pressure fluid at the inlet of the injector can be the action of a pressure pump or the action of other high-pressure fluids.

3. The internal pipe powerful cleaning device and method according to claim 1, characterized in that: solid The specific gravity of the particles is less than 1, and the material is not limited. It can be a single material or a combination of multiple materials. The solid particles are solid particles or hollow spherical particles.

4. A tube internal powerful cleaning device and method according to claim 1, characterized in that: In order to enhance the cleaning effect, one or more combinations of increasing the specific gravity of the solid particles, the concentration of solid particles in the fluid, the flow rate of the fluid, and setting a turbulator in the pipe are adopted.

5. A tube internal high-pressure cleaning device and method according to claim 1, characterized in that: This device is suitable for cleaning inside the pipe or inside the membrane of pipelines and channels with a diameter greater than 0.05 mm, such as: plate heat exchangers, spiral wound tube heat exchangers, shell and tube heat exchangers, coil heat exchangers, plate membranes and tubular membranes, etc.; the equipment to be cleaned can be vertical or horizontal, and can be connected in series or in parallel with multiple units.

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