Secondary steam pipeline defoaming and washing equipment for MVR (Mechanical Vapor Recompression) system

Abstract

The utility model relates to secondary steam pipeline defoaming and washing equipment for an MVR (Mechanical Vapor Recompression) system, which comprises an air inlet pipeline and a defoaming and water vapor separating equipment barrel body, and is characterized in that a first spraying and washing pipe, a second spraying and washing pipe, a third spraying and washing pipe and a fourth spraying and washing pipe are sequentially arranged in the air inlet pipeline from top to bottom; a first cone of the defoaming and separating water vapor equipment is mounted between the air inlet pipeline and the defoaming and separating water vapor equipment barrel; and a second cone of the defoaming and separating water vapor equipment is mounted at the other end of the defoaming and separating water vapor equipment barrel. According to the utility model, the cleaning liquid is changed into tiny liquid beads after passing through the spray washing pipe of the air inlet pipeline and is sprayed out to form mist, so that the contact area with secondary steam is increased, corrosive gas in the secondary steam can be prevented from damaging a compressor impeller, the liquid drops can be prevented from colliding with the compressor impeller, and the good use condition of the compressor is ensured; the service life of the compressor is prolonged, and the stability of system operation is further guaranteed.

Description

Technical Field

[0001] The utility model specifically relates to a defoaming and washing device for secondary steam pipelines in an MVR system, belonging to the technical field of gas washing devices. Background Technique

[0002] The MVR evaporator is the abbreviation of the English mechanical vapor recompression. MVR is a technology that reuses the energy of the secondary steam generated by itself, thereby reducing the demand for external energy. One of its core devices is the compressor. After the secondary steam is compressed by the compressor, the pressure and temperature increase, the enthalpy increases accordingly, and it is sent to the heating chamber of the evaporator as heating steam, that is, live steam, to keep the liquid in an evaporation state, while the heating steam itself transfers heat to the material and condenses into water. In this way, the originally wasted steam is fully utilized, the latent heat is recovered, and the thermal efficiency is improved.

[0003] Generally, compressors have two forms: open impeller and closed impeller. Open impeller compressors mostly operate at high speeds, and the linear velocity can reach more than 400 m / s. The linear velocity of the closed impeller also reaches about 270 m / s. They have strict requirements for the gas entering the impeller. If there are small water droplets and gases corrosive to the impeller, it is easy to cause a huge impact on the impeller. Therefore, a defoaming and washing device must be set at the inlet of the compressor. After the secondary steam enters the defoaming and washing device and is washed by the cleaning liquid, the gases with odors or corrosiveness such as ammonia and hydrogen chloride in the gas and impurities can be absorbed and carried away by the cleaning liquid.

[0004] Therefore, in view of the deficiencies in the prior art, a defoaming and washing device for secondary steam pipelines in an MVR system is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a defoaming and washing device for secondary steam pipelines in an MVR system to solve the problems mentioned in the above background technique.

[0006] The present utility model realizes the above object through the following technical solutions. A defoaming and washing device for the secondary steam pipeline of an MVR system includes an intake pipeline and a defoaming and separating water-vapor equipment cylinder body. It is characterized in that a first spray washing pipe, a second spray washing pipe, a third spray washing pipe, and a fourth spray washing pipe are sequentially arranged from top to bottom in the intake pipeline. A first cone of the defoaming and separating water-vapor equipment is installed between the intake pipeline and the defoaming and separating water-vapor equipment cylinder body. A second cone of the defoaming and separating water-vapor equipment is installed at the other end of the defoaming and separating water-vapor equipment cylinder body. Spiral nozzles are provided on the first spray washing pipe, the second spray washing pipe, the third spray washing pipe, and the fourth spray washing pipe. The spiral nozzles are thread interfaces. A first folding plate and a second folding plate are installed in the defoaming and separating water-vapor equipment cylinder body for separating water vapor.

[0007] Further, an intake pipeline flange and a disassembly and assembly interface flange are installed in the intake pipeline. Disassembly and assembly interface flanges are provided at the inlets of the first spray washing pipe, the second spray washing pipe, the third spray washing pipe, and the fourth spray washing pipe. The disassembly and assembly interface flanges are welded to the matching external flanges, and the spray washing pipes are installed into the intake pipeline through the intake pipeline flange.

[0008] Further, a cleaning liquid discharge port is provided at the bottom of the defoaming and separating water-vapor equipment cylinder body. The cleaning liquid discharge port is connected with a cleaning liquid circulation pump for recycling the cleaning liquid.

[0009] Further, a liquid level gauge interface, a thermometer interface, and a conductivity meter interface are provided on the defoaming and separating water-vapor equipment cylinder body.

[0010] Further, the other end of the second cone of the defoaming and separating water-vapor equipment is connected with an outlet pipeline.

[0011] The beneficial effects of the present utility model:

[0012] 1. By arranging 4 layers of spray washing pipes inside the intake pipeline 2, after the cleaning liquid enters the 4 layers of spray washing pipes, the cleaning liquid becomes tiny liquid beads and sprays out to form a mist after being tangent to and colliding with the continuously decreasing spiral surface, increasing the contact surface with the secondary steam, washing and purifying the impurities in the secondary steam. Without adding additional equipment, the structure is optimized by transforming the original equipment, reducing the equipment cost and floor area.

[0013] 2. After the secondary steam enters the intake pipe and is spray-washed, it is connected to the demisting and water-vapor separating device through a 90-degree elbow. Under the action of gravity, the cleaning liquid moves downward and falls into the bottom of the cylinder body of the demisting and water-vapor separating device, while the secondary steam moves upward. After the entrained small liquid droplets are further removed through the baffle plate, it flows back to the outlet on the side of the second cone and is discharged from the gas outlet of the scrubbing tower, achieving the effect of purifying the secondary steam. This can prevent the corrosive gas in the secondary steam from damaging the compressor impeller and the liquid droplets from colliding with the compressor impeller, ensuring good operating conditions of the compressor, extending the service life of the compressor, and further ensuring the stability of the system operation. Brief Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] In the figure: 1. Intake pipe flange; 2. Intake pipe; 3. First spray-washing pipe; 4. Second spray-washing pipe; 5. Third spray-washing pipe; 6. Fourth spray-washing pipe; 7. Intake port of the demisting and water-vapor separating device; 8. First cone of the demisting and water-vapor separating device; 9. Cylinder body of the demisting and water-vapor separating device; 10. First baffle plate; 11. Second baffle plate; 12. Second cone of the demisting and water-vapor separating device; 13. Outlet pipe. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figure 1 as shown Figure 1 is a schematic structural diagram of the present invention.

[0018] A demisting and washing device for the secondary steam pipeline in an MVR system includes an intake pipe 2 and a cylinder body 9 of the demisting and water-vapor separating device. It is characterized in that a first spray-washing pipe 3, a second spray-washing pipe 4, a third spray-washing pipe 5, and a fourth spray-washing pipe 6 are sequentially arranged from top to bottom in the intake pipe 2. An intake port 8 of the demisting and water-vapor separating device is installed between the intake pipe 2 and the cylinder body 9 of the demisting and water-vapor separating device. A second cone 12 of the demisting and water-vapor separating device is installed at the other end of the cylinder body 9 of the demisting and water-vapor separating device. Spiral nozzles are provided on the first spray-washing pipe 3, the second spray-washing pipe 4, the third spray-washing pipe 5, and the fourth spray-washing pipe 6. The spiral nozzles are thread interfaces. A first baffle plate 10 and a second baffle plate 11 are installed in the cylinder body 9 of the demisting and water-vapor separating device for separating water vapor.

[0019] Among them, both ends of the cylinder body 9 of the demisting and water-vapor separating device are conical, and the angles of the first cone 8 and the second cone 12 of the demisting and water-vapor separating device are 90 degrees.

[0020] Furthermore, an intake pipe flange 1 and a disassembly and assembly interface flange are installed in the intake pipe 2. Disassembly and assembly interface flanges are provided at the upper inlets of the first spray washing pipe 3, the second spray washing pipe 4, the third spray washing pipe 5, and the fourth spray washing pipe 6. The disassembly and assembly interface flanges are welded to the supporting external flanges, and the spray washing pipes are inserted into the intake pipe 2 through the intake pipe flange 1.

[0021] Among them, the upper part of the intake pipe 2 is connected with an intake pipe flange 1 for easy disassembly and assembly.

[0022] Among them, the spiral nozzle is set with a thread interface, which can be easily installed with other equipment, simplifies the installation process, and is more convenient for later maintenance and disassembly, saving time and labor costs.

[0023] Among them, the internal structures of the spiral nozzle and the washing pipe are set as continuously decreasing spiral surfaces for spraying the cleaning liquid into tiny liquid beads.

[0024] Furthermore, a cleaning liquid discharge port is provided at the bottom of the cylinder body 9 of the demisting and water-vapor separating device, and the cleaning liquid discharge port is connected with a cleaning liquid circulation pump for recycling the cleaning liquid.

[0025] Among them, a cleaning liquid discharge port is provided at the bottom of the cylinder body 9 of the demisting and water-vapor separating device, and the cleaning liquid discharge port is connected with a cleaning liquid circulation pump. Through the circulation pump, it is connected to the interfaces of the first spray washing pipe 3, the second spray washing pipe 4, the third spray washing pipe 5, and the fourth spray washing pipe 6 in the intake pipe 1, and the cleaning liquid is recycled.

[0026] Furthermore, a liquid level gauge interface, a thermometer interface, and a conductivity meter interface are provided on the cylinder body 9 of the demisting and water-vapor separating device.

[0027] Among them, the liquid level gauge interface, the thermometer interface, and the conductivity meter interface are used to control the amount of cleaning liquid, the temperature, and the conductivity in the cylinder body 9 of the demisting and water-vapor separating device.

[0028] Furthermore, the other end of the second cone 12 of the demisting and water-vapor separating device is connected with an air outlet pipe 13.

[0029] Among them, the purified steam is discharged from the washing tower through the air outlet pipe 13 and then enters the compressor.

[0030] The beneficial effects of the present utility model:

[0031] 1. By arranging four layers of spray washing pipes inside the intake pipe 2, after the cleaning liquid enters the four layers of spray washing pipes, the cleaning liquid becomes tiny liquid droplets and sprays out to form a mist after tangentially contacting and colliding with the continuously decreasing spiral surface, increasing the contact surface with the secondary steam, washing and purifying the impurities in the secondary steam. Without adding extra equipment, the original equipment is transformed and optimized in structure, reducing the equipment cost and floor area.

[0032] 2. After the secondary steam passes through the spray washing in the intake pipe, it is connected to the demisting and separating water-vapor equipment through a 90-degree elbow. Under the action of gravity, the cleaning liquid moves downward and falls into the bottom of the cylinder body of the demisting and separating water-vapor equipment, while the secondary steam moves upward. After further removing the entrained small liquid droplets through the baffle plate, it turns back and flows to the outlet on the side of the second cone, and is discharged from the gas outlet of the scrubbing tower, achieving the effect of purifying the secondary steam. This can prevent the corrosive gas in the secondary steam from damaging the compressor impeller and the liquid droplets from colliding with the compressor impeller, ensuring the good operating conditions of the compressor, extending the service life of the compressor, and further ensuring the stability of the system operation.

[0033] In the present utility model, the working mode of the secondary steam pipe demisting and washing equipment for the MVR system is as follows:

[0034] After the secondary steam enters the intake pipe 2 from the intake pipe flange 1, in the intake pipe 2, the secondary steam is successively washed by the cleaning liquid sprayed from the first spray washing pipe 3, the second spray washing pipe 4, the third spray washing pipe 5, and the fourth spray washing pipe 6. The odorous or corrosive gases and impurities such as ammonia and hydrogen chloride in the gas are absorbed and carried away by the cleaning liquid, and then the intake pipe 2 is connected to the first cone 8 of the demisting and separating water-vapor equipment through a 90-degree elbow, and then extends into the cylinder body 9 of the demisting and separating water-vapor equipment. Under the action of gravity, the cleaning liquid moves downward and falls into the bottom of the cylinder body 9 of the demisting and separating water-vapor equipment, while the secondary steam moves upward. After further removing the entrained small liquid droplets through the first baffle plate 10 and the second baffle plate 11 of the demisting and separating water-vapor equipment, it turns back and flows to the outlet of the second cone 12 of the demisting and separating water-vapor equipment, and is discharged from the gas outlet pipe 13 of the scrubbing tower into the compressor, achieving the effect of purifying the secondary steam.

[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0036] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A secondary steam pipeline defoaming and washing equipment for an MVR system, comprising an air intake pipeline and a defoaming and water vapor separation equipment cylinder, characterized in that: The air intake pipe is provided with a first spray washing pipe, a second spray washing pipe, a third spray washing pipe and a fourth spray washing pipe from top to bottom in sequence, a first cone of the defoaming and water vapor separation equipment is installed between the air intake pipe and the cylinder of the defoaming and water vapor separation equipment, a second cone of the defoaming and water vapor separation equipment is installed at the other end of the cylinder of the defoaming and water vapor separation equipment, the first spray washing pipe, the second spray washing pipe, the third spray washing pipe and the fourth spray washing pipe are all provided with spiral nozzles, the spiral nozzles are threaded interfaces, a first folding plate and a second folding plate are installed in the cylinder of the defoaming and water vapor separation equipment for separating water vapor.

2. The secondary steam pipeline defoaming and washing equipment for the MVR system according to claim 1, characterized in that: An intake pipe flange and a disassembly interface flange are installed in the intake pipe. The inlets of the first spray washing pipe, the second spray washing pipe, the third spray washing pipe and the fourth spray washing pipe are provided with disassembly interface flanges. The disassembly interface flanges are welded to the matching external flange. The spray washing pipe is installed in the intake pipe through the intake pipe flange.

3. The secondary steam pipeline defoaming and washing equipment for the MVR system according to claim 2, characterized in that: A cleaning liquid discharge port is provided at the bottom of the cylinder of the defoaming and water vapor separation equipment, and the cleaning liquid discharge port is connected to a cleaning liquid circulation pump for recycling the cleaning liquid.

4. The secondary steam pipeline defoaming and washing equipment for the MVR system according to claim 3, characterized in that: The cylinder of the defoaming and water vapor separation equipment is provided with a liquid level meter interface, a thermometer interface and a conductivity meter interface.

5. The secondary steam pipeline defoaming and washing equipment for the MVR system according to claim 1, characterized in that: The other end of the second cone of the defoaming and water vapor separation equipment is connected with an air outlet pipe.

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