Flash vapor recovery and utilization device in two-stage sludge drying equipment

Abstract

This utility model discloses a flash steam recovery and utilization device for a two-stage sludge drying equipment, specifically relating to the field of sludge drying technology. It includes a flash tank, a first steam inlet pipe, and three steam condensate inlet pipes. The first steam inlet pipe and the three steam condensate inlet pipes are all fixedly connected to the flash tank. A steam outlet pipe and a water outlet pipe are fixedly connected to the flash tank, with the water outlet pipe located at the bottom of the steam outlet pipe. An overflow pipe is fixedly connected to one side of the flash tank, and an inner frame is fixedly connected to one side of the flash tank. An adjustment component is installed on the inner frame. This utility model discharges excess steam condensate from the flash tank through the overflow pipe, ensuring safe operation. A second stepper motor drives a T-shaped plate and a gasket to move downwards. The gasket improves the sealing between the T-shaped plate and the inner frame. By adjusting the position of the T-shaped plate, the discharge height of the steam condensate can be adjusted. The operation is simple, convenient for discharging excess condensate, and offers high safety performance.

Description

Technical Field

[0001] This utility model relates to the field of sludge drying technology, and more specifically, to a flash steam recovery and utilization device in a two-stage sludge drying equipment. Background Technology

[0002] Sludge drying is a process that removes most of the water content from sludge through evaporation and other processes. It generally refers to the use of self-evaporation facilities such as sludge drying beds. After superheated steam enters the drying workshop, it is turned into saturated steam by a desuperheater and flows to the drying line. The main drying equipment consists of a first-stage thin-layer evaporator and a second-stage belt dryer. The former is indirect drying, while the latter is direct drying with hot air. After two-stage drying, the volume is significantly reduced, which facilitates storage and transportation and also reduces energy consumption in subsequent sludge treatment processes.

[0003] A search revealed Chinese patent CN218442235U, which discloses a flash steam recovery and utilization device. By incorporating a spray assembly, the device cools the flash steam in the condensate tank, reducing the exhaust steam volume in the condensate expansion tank and increasing the condensate volume. This achieves condensate utilization, reducing costs. Simultaneously, the spray assembly is connected to the condensate tank, allowing some of the condensate in the tank to be sprayed onto the flash steam in the condensate expansion tank for cooling, thus achieving condensate recycling. Furthermore, warm air is used to cool the flash steam exiting the two boiler blowdown expansion tanks, saving plant floor space. This allows for timely and effective recovery of flash steam within the system, increasing its utilization rate, enhancing system stability, and contributing to energy conservation and consumption reduction.

[0004] When the above-mentioned recycling device is used for sludge drying, some of the condensate in the condensate tank can be sprayed onto the flash steam in the condensate expansion tank through the spray assembly to cool it down. However, it is inconvenient to drain too much condensate. When too much water accumulates, it will change the pressure balance in the system, making the spray pressure unstable, which in turn affects the spraying effect and causes the flash steam to not be cooled sufficiently. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a flash steam recovery and utilization device in a two-stage sludge drying equipment, which aims to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flash steam recovery and utilization device on a two-stage sludge drying equipment, comprising a flash tank, a first steam inlet pipe, and three steam condensate inlet pipes. The first steam inlet pipe and the three steam condensate inlet pipes are all fixedly connected to the flash tank. A steam outlet pipe and a water outlet pipe are fixedly connected to the flash tank, with the water outlet pipe located at the bottom of the steam outlet pipe. An overflow pipe is fixedly connected to one side of the flash tank. An inner frame is fixedly connected to one side of the flash tank. An adjustment assembly is provided on the inner frame. The adjustment assembly includes a second stepper motor, a second rotating shaft, a lead screw, a T-shaped plate, and two limiting rods. The second stepper motor is fixedly installed on the outside of the flash tank, and the output shaft end of the second stepper motor is fixedly connected to the second rotating shaft. The top end of the second rotating shaft is fixedly connected to the lead screw, and the top and bottom ends of the second rotating shaft are movably connected to the inner frame and the flash tank through bearings. The lead screw is internally threaded to the T-shaped plate, and the bottom ends of the two limiting rods penetrate the T-shaped plate and are fixedly connected to the inner frame.

[0007] Furthermore, a gasket is fixedly connected to one side of the T-shaped plate, and one side of the gasket is in contact with the inner frame.

[0008] It can be seen that the above technical solution can improve the sealing between the T-shaped plate and the inner frame.

[0009] Furthermore, a flow meter is fixedly installed on the steam outlet pipe, wherein the flow meter serves to detect low-temperature and low-pressure steam.

[0010] Furthermore, a base is fixedly connected to the bottom end of the first steam inlet pipe, wherein the base serves to facilitate support for the flash tank.

[0011] Furthermore, a water pump is fixedly installed at the top of the base, the input end of the water pump is fixedly connected to a third steam inlet pipe, the output end of the water pump is fixedly connected to a second steam inlet pipe, and the other end of the second steam inlet pipe is fixedly connected to the first steam inlet pipe.

[0012] It can be seen that the above technical solution facilitates the extraction of high-temperature and high-pressure steam condensate from the steam system.

[0013] Furthermore, the flash tank is equipped with a rotating assembly, which includes a first stepper motor, a first rotating shaft, and multiple stirring blades.

[0014] Furthermore, the first stepper motor is fixedly installed on the other side of the flash tank, and the output shaft end of the first stepper motor is fixedly connected to the first rotating shaft, which is located inside the flash tank, and multiple stirring blades are fixedly installed on the first rotating shaft.

[0015] It can be seen that the above technical solutions aim to increase the speed of flash evaporation.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. This utility model uses an overflow pipe to discharge excess steam condensate from the flash tank, ensuring safe use. The second stepper motor drives the second rotating shaft and lead screw to rotate. The lead screw can move the T-shaped plate and gasket downwards. The gasket can improve the sealing between the T-shaped plate and the inner frame. By adjusting the position of the T-shaped plate, the discharge height of the steam condensate can be adjusted. It is simple to operate, convenient to discharge excess condensate, and has high safety performance.

[0018] 2. This utility model uses a water pump to extract high-temperature, high-pressure steam condensate from the steam system through a third steam inlet pipe, and injects it into the first steam inlet pipe through a second steam inlet pipe. Finally, it enters the flash tank. The first stepper motor is started, which drives the first rotating shaft to rotate, thereby driving multiple stirring blades to rotate. The multiple stirring blades bring the high-temperature, high-pressure steam condensate into contact with the inner wall of the flash tank, thereby increasing the flashing speed. The structure is simple and easy to use. Attached Figure Description

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a bottom view of the overall structure of this utility model;

[0022] Figure 3 This is a cross-sectional view of the flash tank and a schematic diagram of the assembly structure of the steam condensate inlet pipe of this utility model.

[0023] Figure 4 This is a cross-sectional view of the flash tank and a schematic diagram of the agitator blade assembly structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the adjustment component structure of this utility model.

[0025] In the diagram: 1. Flash tank; 2. First steam inlet pipe; 3. Second steam inlet pipe; 4. Water pump; 5. Third steam inlet pipe; 6. Steam condensate inlet pipe; 7. Steam outlet pipe; 8. Flow meter; 9. Overflow pipe; 10. Water outlet pipe; 11. Base; 12. First stepper motor; 13. Adjustment assembly; 14. Inner frame; 15. First rotating shaft; 16. Stirring blade; 1301. Second stepper motor; 1302. Second rotating shaft; 1303. Lead screw; 1304. T-shaped plate; 1305. Limiting rod; 1306. Gasket. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Refer to the instruction manual appendix Figure 1-5 The flash steam recovery and utilization device in the two-stage sludge drying equipment of this embodiment includes a flash tank 1, a first steam inlet pipe 2, and three steam condensate inlet pipes 6. The first steam inlet pipe 2 and the three steam condensate inlet pipes 6 are all fixedly connected to the flash tank 1. A steam outlet pipe 7 and a water outlet pipe 10 are fixedly connected to the flash tank 1, and the water outlet pipe 10 is located at the bottom of the steam outlet pipe 7. An overflow pipe 9 is fixedly connected to one side of the flash tank 1. An inner frame 14 is fixedly connected to one side of the interior of the flash tank 1. An adjustment component 13 is provided on the inner frame 14. The adjustment component 13 includes a second stepper motor 1301 and a second rotating shaft 130 2. A lead screw 1303, a T-shaped plate 1304, and two limiting rods 1305 are included. A second stepper motor 1301 is fixedly installed on the outside of the flash tank 1, and the output shaft end of the second stepper motor 1301 is fixedly connected to the second rotating shaft 1302. The top end of the second rotating shaft 1302 is fixedly connected to the lead screw 1303, and the top and bottom ends of the second rotating shaft 1302 are movably connected to the inner frame 14 and the flash tank 1 through bearings. The lead screw 1303 is internally threaded to the T-shaped plate 1304, and the bottom ends of the two limiting rods 1305 penetrate the T-shaped plate 1304 and are fixedly connected to the inner frame 14.

[0028] Furthermore, a gasket 1306 is fixedly connected to one side of the T-shaped plate 1304, and one side of the gasket 1306 is in contact with the inner frame 14.

[0029] Furthermore, a flow meter 8 is fixedly installed on the steam outlet pipe 7, wherein the flow meter 8 serves to detect low-temperature and low-pressure steam.

[0030] Furthermore, a base 11 is fixedly connected to the bottom end of the first steam inlet pipe 2. The base 11 serves to support the flash tank 1. A water pump 4 is fixedly installed at the top end of the base 11. The input end of the water pump 4 is fixedly connected to the third steam inlet pipe 5, and the output end of the water pump 4 is fixedly connected to the second steam inlet pipe 3. The other end of the second steam inlet pipe 3 is fixedly connected to the first steam inlet pipe 2.

[0031] Furthermore, the flash tank 1 is provided with a rotating assembly, which includes a first stepper motor 12, a first rotating shaft 15 and multiple stirring blades 16. The first stepper motor 12 is fixedly installed on the other side of the flash tank 1, and the output shaft end of the first stepper motor 12 is fixedly connected to the first rotating shaft 15. The first rotating shaft 15 is located inside the flash tank 1, and multiple stirring blades 16 are all fixedly installed on the first rotating shaft 15.

[0032] The system involves starting water pump 4, which draws high-temperature, high-pressure steam condensate from the steam system of the sludge drying equipment through the third steam inlet pipe 5. The condensate is then injected into the first steam inlet pipe 2 through the second steam inlet pipe 3 and finally enters the flash tank 1. The first stepper motor 12 is then started, which drives the first rotating shaft 15 to rotate, thereby driving multiple stirring blades 16 to rotate. The multiple stirring blades 16 bring the high-temperature, high-pressure steam condensate into contact with the inner wall of the flash tank 1, thereby increasing the flashing speed. The system is simple in structure and easy to use.

[0033] The usage method of this embodiment is as follows:

[0034] During use, high-temperature and high-pressure steam condensate enters the flash tank 1 through the first steam inlet pipe 2. The condensate pump is connected to the steam condensate inlet pipe 6 by bolts. The high-temperature and high-pressure steam condensate is flashed into low-temperature and low-pressure steam in the flash tank 1. The low-temperature and low-pressure steam is discharged from the flash tank 1 through the steam outlet pipe 7. The condensate is discharged from the flash tank 1 through the water outlet pipe 10. The overflow pipe 9 discharges excess steam condensate from the flash tank 1 to ensure safe use.

[0035] The second stepper motor 1301 is started, which drives the second rotating shaft 1302 and the lead screw 1303 to rotate. Since the lead screw 1303 is threadedly connected to the T-shaped plate 1304, and the two limit rods 1305 restrict the rotation of the T-shaped plate 1304, the lead screw 1303 can drive the T-shaped plate 1304 and the gasket 1306 to move downward. The gasket 1306 can improve the sealing between the T-shaped plate 1304 and the inner frame 14. By adjusting the position of the T-shaped plate 1304, the discharge height of the steam condensate can be adjusted. The operation is simple, it is convenient to discharge excess condensate, and the safety performance is high. It is worth noting that multiple external pipes are connected to the steam condensate inlet pipe 6, the steam outlet pipe 7, the overflow pipe 9, and the water outlet pipe 10 respectively by bolts, and valves are installed on multiple external pipes.

[0036] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flash steam recovery and utilization device on a two-stage sludge drying equipment, comprising a flash tank (1), a first steam inlet pipe (2), and three steam condensate inlet pipes (6), wherein the first steam inlet pipe (2) and the three steam condensate inlet pipes (6) are all fixedly connected to the flash tank (1), characterized in that: The flash tank (1) is fixedly connected to a steam outlet pipe (7) and a water outlet pipe (10), and the water outlet pipe (10) is located at the bottom of the steam outlet pipe (7). An overflow pipe (9) is fixedly connected to one side of the flash tank (1). An inner frame (14) is fixedly connected to one side of the inside of the flash tank (1), and an adjustment component (13) is provided on the inner frame (14). The adjustment assembly (13) includes a second stepper motor (1301), a second rotating shaft (1302), a lead screw (1303), a T-shaped plate (1304), and two limiting rods (1305). The second stepper motor (1301) is fixedly installed on the outside of the flash tank (1), and the output shaft end of the second stepper motor (1301) is fixedly connected to the second rotating shaft (1302). The top end of the second rotating shaft (1302) is fixedly connected to the lead screw (1303), and the top and bottom ends of the second rotating shaft (1302) are movably connected to the inner frame (14) and the flash tank (1) through bearings. The lead screw (1303) is internally threaded to the T-shaped plate (1304), and the bottom ends of the two limiting rods (1305) penetrate the T-shaped plate (1304) and are fixedly connected to the inner frame (14).

2. The flash vapor recovery and utilization device in the two-stage sludge drying equipment according to claim 1, characterized in that: A gasket (1306) is fixedly connected to one side of the T-shaped plate (1304), and one side of the gasket (1306) is in contact with the inner frame (14).

3. The flash vapor recovery and utilization device in the two-stage sludge drying equipment according to claim 1, characterized in that: A flow meter (8) is fixedly installed on the steam outlet pipe (7), wherein the flow meter (8) plays the role of detecting low temperature and low pressure steam.

4. The flash vapor recovery and utilization device in the two-stage sludge drying equipment according to claim 1, characterized in that: The bottom end of the first steam inlet pipe (2) is fixedly connected to a base (11), wherein the base (11) serves to facilitate the support of the flash tank (1).

5. The flash vapor recovery and utilization device in the two-stage sludge drying equipment according to claim 4, characterized in that: A water pump (4) is fixedly installed at the top of the base (11). The input end of the water pump (4) is fixedly connected to a third steam inlet pipe (5). The output end of the water pump (4) is fixedly connected to a second steam inlet pipe (3), and the other end of the second steam inlet pipe (3) is fixedly connected to the first steam inlet pipe (2).

6. The flash vapor recovery and utilization device in the two-stage sludge drying equipment according to claim 1, characterized in that: The flash tank (1) is equipped with a rotating assembly, which includes a first stepper motor (12), a first rotating shaft (15) and multiple stirring blades (16).

7. The flash vapor recovery and utilization device in the two-stage sludge drying equipment according to claim 6, characterized in that: The first stepper motor (12) is fixedly installed on the other side of the flash tank (1), and the output shaft end of the first stepper motor (12) is fixedly connected to the first rotating shaft (15). The first rotating shaft (15) is located inside the flash tank (1), and multiple stirring blades (16) are fixedly installed on the first rotating shaft (15).

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