Steam recovery device for feed mill

Abstract

The utility model discloses a feed mill steam recovery device which comprises a steam generator, a steam using device and a condensate water storage device, the steam outlet end of the steam generator is connected with the steam using device, and the outlet end of the steam using device is connected with the condensate water storage device. A condensate circulating pump is arranged between the condensate storage equipment and the steam generator, and the condensate circulating pump pumps condensate water to the steam generator to form cyclic utilization. According to the steam recovery device for the feed mill, a mixture of steam and water is separated through the water segregator, so that high-temperature steam is directly sent back to the steam generator to be heated again and directly utilized; condensed liquid is fed into the water storage tank, ferromagnetic impurities of water are removed, then the water is fed back to the steam generator to be heated to form steam, and the device achieves full utilization of condensed water, is high in water recovery rate, effectively saves water resources and well utilizes heat.

Description

Technical Field

[0001] The utility model relates to the technical field of steam recovery and utilization, in particular to a steam recovery device for a feed mill. Background Art

[0002] Generally, when a feed mill produces feed, devices such as pellet mills need to be provided with steam, and the devices for providing steam include boilers or steam generators. Generally speaking, after the generated steam passes through the feed production device, the used steam and condensed water are simply discharged into the air. In this way, although the device is simple and the cost of subsequent steam treatment is saved, after long-term use, the steam directly discharged after one-time utilization will cause a large amount of water resource waste and heat waste, and the losses caused by water sources and heat energy due to steam discharge after years of production are relatively large.

[0003] Application No.: CN201620567024.X discloses a steam recovery and utilization device. A steam condensation pipeline is connected to a steam source, a condenser and a condensate valve are connected to the steam condensation pipeline, the condenser is connected to a liquid recovery tank through a water delivery pipeline, an openable upper cover is arranged at the top of the liquid recovery tank, a filter screen parallel to the bottom surface of the liquid recovery tank is arranged inside the liquid recovery tank near the upper cover, the water outlet of the water delivery pipeline is located above the filter screen, a drain port is also arranged at the bottom of the liquid recovery tank, a filter piece is detachably installed at the drain port, a drain pipe is connected to the drain port, the drain pipe is externally connected to a water storage tank, a steam recovery pipeline is respectively connected to the steam source and the steam recovery tank, a heat preservation layer is coated on the inner wall of the steam recovery tank, an air outlet pipe with a switch is connected to the steam recovery tank, and the air outlet pipe is externally connected to a steam reuse device.

[0004] It specifically sets a condenser for condensing steam, which will undoubtedly cause most of the heat to be dissipated and the heat is not well utilized; secondly, it pumps the condensed water to the water storage tank for storage through a water pump and does not circulate back to the system for reuse.

[0005] Therefore, it is urgent to study a steam recovery device for a feed mill to solve the above-mentioned problems. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the above-mentioned technical problems and provide a steam recovery device for a feed mill.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme: A steam recovery device for a feed mill includes a steam generator, a steam using device, and a condensate storage device. The steam outlet end of the steam generator is connected to the steam using device, the outlet end of the steam using device is connected to the condensate storage device, and a condensate circulation pump is arranged between the condensate storage device and the steam generator. The condensate circulation pump pumps the condensate to the steam generator to form a recycling.

[0008] Further, the condensate storage device includes a water separator and a water storage tank. The outlet end of the steam using device is connected to the water separator. The water separator is provided with a steam outlet and a condensate outlet. The steam outlet is connected to the steam generator, and the condensate outlet is connected to the water storage tank.

[0009] Further, it also includes a water filtration device. The water outlet of the water filtration device supplies water to the steam generator, and the water filtration device filters and softens the raw water.

[0010] Further, the water separator includes a tank body. One side of the tank body is provided with a water-vapor mixing inlet. The bottom of the tank body is a condensate tank. The upper part of the tank body is provided with a screen layer. The water separator is also provided with a spray circulation pump. The inlet pipe of the spray circulation pump is connected to the bottom of the condensate tank, and the outlet pipe of the spray circulation pump is connected to the upper side of the screen layer. The end of the outlet pipe is located inside the water separator, and a nozzle for spraying downward onto the screen layer is provided at the end of the outlet pipe. The water-vapor mixing inlet is connected to an L-shaped pipe inside the tank body. The horizontal pipe of the L-shaped pipe is located above the screen layer, and the end of the horizontal pipe is located at the center of the screen layer. A vertical pipe is vertically connected to the end of the horizontal pipe. The vertical pipe passes through the screen layer downward, and a flared mouth with a gradually expanding downward opening is connected to the lower end of the vertical pipe. A conical distribution cone is provided below the flared mouth.

[0011] Further, a ferromagnetic impurity removal structure is provided inside the water storage tank. The water storage tank is a horizontal tank with a cylindrical inner wall. The ferromagnetic impurity removal structure includes a circular ring part rotatably connected around the axis of the water storage tank. The circular ring part is provided with magnetic components at least on its inner wall. A receiving groove is provided above the liquid level inside the water storage tank. One end of the receiving groove extends to the inside of the circular ring part, and the receiving groove is upward and close to the upper side of the circular ring part. The other end of the receiving groove extends to the cleaning port.

[0012] Further, a central shaft is provided along the axis inside the water storage tank. A plurality of radial rods are circumferentially provided on the side of the central shaft and connected to the circular ring part. The other end of the central shaft is provided with a reduction motor outside the water storage tank.

[0013] Further, one end of the receiving groove is horizontally connected to one end of the water storage tank. The water storage tank is provided with a cleaning port at this place. A first cut-off valve, a slag discharge pipe, and a second cut-off valve are sequentially provided outside the water storage tank at the cleaning port.

[0014] Further, a slag pushing device is provided inside the water storage tank. The slag pushing device includes a linear motor. The linear motor is arranged along the length direction of the receiving groove inside it, and a push plate matching the inner wall of the receiving groove is provided on the screw shaft of the linear motor.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: A steam recovery device for a feed mill according to the utility model separates the mixture of steam and water by means of a water separator, so that the high-temperature steam is directly sent back to the steam generator to be heated again for direct utilization; while the condensed liquid is sent into a water storage tank, and ferromagnetic impurities in the water are removed, and then sent back to the steam generator to be heated to form steam. This device realizes the full utilization of condensate water, has a high water recovery rate, effectively saves water resources, and makes good use of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a process schematic diagram of a steam recovery device for a feed mill according to the utility model Figure 1 ;

[0017] Figure 2 is a process schematic diagram of a steam recovery device for a feed mill according to the utility model Figure 2 ;

[0018] Figure 3 is a schematic structural diagram of the water separator in the utility model;

[0019] Figure 4 is an internal perspective view of the water storage tank of the utility model;

[0020] Figure 5 is a schematic structural diagram of the circular ring part of the utility model;

[0021] Figure 6 is a schematic longitudinal sectional view of the water storage tank of the utility model;

[0022] In the figure: 1. Steam generator; 2. Steam using equipment; 3. Condensate water storage equipment; 4. Condensate liquid circulation pump; 5. Water separator; 6. Water storage tank; 7. Steam outlet; 8. Condensate water outlet; 9. Filter device; 10. Tank body; 11. Water-vapor mixing inlet; 12. Condensate liquid tank; 13. Grating layer; 14. Spray circulation pump; 15. Outlet pipe; 16. Sprinkler head; 17. L-shaped pipe; 18. Flared opening; 19. Distribution cone; 20. Circular ring part; 21. Magnetic component; 22. Receiving groove; 23. Cleaning port; 24. Central shaft; 25. Radial rod; 26. Reduction motor; 27. First cut-off valve; 28. Slag discharge pipe; 29. Second cut-off valve; 30. Linear motor; 31. Push plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0024] A steam recovery device for a feed mill, as Figure 1As shown in the figure, it includes a steam generator 1, a steam using device 2, and a condensate storage device 3. The steam outlet 7 of the steam generator 1 is connected to the steam using device 2. There is also a water filtration device 9 in the front device of the steam generator 1. The water outlet of the water filtration device 9 supplies water to the steam generator 1, and the water filtration device 9 filters and softens the raw water. During actual use, tap water can be used as the water source to supplement water into the steam generator 1 to make up for the water consumption in the system. The water filtration device 9 filters the tap water to form soft water and then enters the steam generator 1, thus avoiding the formation of scale in the pipeline of the system and preventing pipeline blockage.

[0025] The outlet end of the steam using device 2 is connected to the condensate storage device 3. In this embodiment, in a feed mill, devices such as pelletizers need to use steam. The used steam is sent to the rear condensate storage device 3 to realize the collection and reuse of the steam. A condensate circulation pump 4 is provided between the condensate storage device 3 and the steam generator 1, and the condensate circulation pump 4 pumps the condensate to the steam generator 1 to form a recycling.

[0026] Furthermore, as Figure 2 shown, the condensate storage device 3 includes a water separator 5 and a water storage tank 6. Since after passing through the steam using device 2, a part of the steam condenses to form a liquid, while the other part remains in a steam state, and the gas-liquid two-phase enters the rear pipeline at the same time, so water hammer phenomenon is likely to occur in the rear steam utilization pipeline. Therefore, it is necessary to use the water separator 5 to separate the steam and the condensate. Specifically, as Figure 2 shown, the outlet end of the steam using device 2 is connected to the water separator 5. It can be understood that the water separator 5 should be arranged close to the steam using device 2 to minimize the length of the movement of the gas-liquid two-phase in the pipeline. When in use, the water separator 5 is arranged closer to the steam using device 2, and it is safer to send out the steam and the condensate separately, and they can also be utilized separately. The uncondensed steam still has a relatively high temperature, so it can be directly sent back to the steam generator 1 to be heated up and then directly enter the system circulation, while the condensate is sent into the water storage tank 6.

[0027] Specifically, the water separator 5 is provided with a steam outlet 7 and a condensate outlet 8. The steam outlet 7 is connected to the steam generator 1, and the condensate outlet 8 is connected to the water storage tank 6. Furthermore, as Figure 3As shown, the water separator 5 includes a tank body 10. One side of the tank body 10 is provided with a water-vapor mixing inlet 11, and the mixed material enters the tank body 10 through this port. The bottom of the tank body 10 is a condensate tank 12, which is used to store condensate and establish a liquid level. The upper part of the tank body 10 is provided with a sieve layer 13. The sieve layer 13 can prevent steam from carrying liquid droplets upward and avoid condensate flowing out from the steam outlet 7 above. The thickness of the sieve layer 13 can be set as required. It can adopt a dense filter screen with a certain thickness, or the sieve layer 13 can be designed as a packing layer, and random packing or regular packing is filled in this layer. And the pressure difference before and after the sieve layer 13 should be controlled not to be too large. If the pressure difference is too large, it will cause difficulty for steam to rise. A spray circulation pump 14 can also be arranged in the water separator 5. The inlet pipe of the spray circulation pump 14 is connected to the bottom of the condensate tank 12. The spray circulation pump 14 extracts the liquid level established in the condensate tank 12 for self-circulation, so that the sieve layer 13 forms a liquid holding layer, thereby better absorbing the water mist entrained in the steam. It can be understood that by controlling the spray amount, the liquid holding amount of the sieve layer 13 can be changed, so as to control the pressure difference before and after the sieve layer 13, and thus convenient control by the operator can be achieved. Specifically, the outlet pipe 15 of the spray circulation pump 14 is connected to the upper side of the sieve layer 13, and the end of the outlet pipe 15 is located inside the water separator 5; a spray head 16 for spraying downward onto the sieve layer 13 is arranged at the end of the outlet pipe 15. In this embodiment, the water-vapor mixing inlet 11 is connected to an L-shaped pipe 17 inside the tank body 10. The horizontal pipe of the L-shaped pipe 17 is located above the sieve layer 13, and the end of the horizontal pipe is located at the central part of the sieve layer 13. A vertical pipe is vertically connected at the end of the horizontal pipe. The vertical pipe passes through the sieve layer 13 downward, and a flared opening 18 with a gradually expanding downward opening is connected to the lower end of the vertical pipe. A conical distribution cone 19 is arranged below the flared opening 18; as Figure 3 As shown, in order to achieve uniform distribution of steam through the sieve layer 13, it is designed in the shape of a flared opening 18, so that when the water-vapor mixed material flows out from the flared opening 18, the water flow can directly fall, while the steam passes upward through the sieve layer 13. The flared opening 18 can play a certain role in distributing steam. However, in order to make its distribution more uniform around, in this embodiment, a distribution cone 19 is arranged at the outlet of the flared opening 18. The tip of the distribution cone 19 points to the center of the flared opening 18, and the steam impacts the tip part to form an evenly distributed outflowing air flow.

[0028] Furthermore, a ferromagnetic impurity removal structure is arranged inside the water storage tank 6. Since impurities such as rust are likely to be generated inside the system equipment, in this embodiment, the property that rust can be magnetically adsorbed is utilized, and the principle of an electromagnet is used to adsorb ferromagnetic impurities and remove them from the water.

[0029] As Figures 4 - 6As shown, the water storage tank 6 is a horizontal tank with a cylindrical inner wall. The ferromagnetic impurity removal structure includes a circular ring part 20 rotatably connected along the axis of the water storage tank 6. A central shaft 24 is provided along the axis inside the water storage tank 6. A plurality of radial rods 25 are circumferentially provided on the side of the central shaft 24 and connected to the circular ring part 20. The other end of the central shaft 24 is provided with a reduction motor 26 outside the water storage tank 6. During actual use, the reduction motor 26 drives the central shaft 24 to rotate, so that the internal circular ring part 20 rotates around the central shaft 24. During rotation, the side wall of the circular ring part 20 is continuously immersed in water and then rotates away from the water surface. Further, a magnetic component 21 is provided on the inner wall of the circular ring part 20, such as Figure 5 As shown, in this embodiment, the magnetic component 21 can be an electromagnet component arranged one by one. It has magnetism when powered on and loses magnetism when powered off. Using this principle and in cooperation with the rotation of the circular ring part 20, automatic control operation can be adopted during actual control, that is, the electromagnet in the circular ring part 20 immersed in water is powered on to have magnetic force, so as to attract ferromagnetic impurities in the water, and then drive them to move away from the water surface. Then the electromagnet is powered off, so that the ferromagnetic impurities leave the circular ring part 20 and freely fall. Further, a receiving groove 22 is provided above the liquid level inside the water storage tank 6. One end of the receiving groove 22 extends to the inside of the circular ring part 20, and the receiving groove 22 is upward and close to the upper side of the circular ring part 20. The other end of the receiving groove 22 extends to the cleaning port 23. Therefore, when the impurities fall, they can fall into the receiving groove 22 for collection, achieving the effect of separating ferromagnetic impurities.

[0030] It can be understood that in some other embodiments, the magnetic component 21 can also use a permanent magnet. In this case, a scraper needs to be provided for cooperation. That is, when leaving the water surface to above the receiving groove 22, the scraper sweeps the inner wall of the circular ring part 20 to scrape off the adsorbed impurities and make them fall into the receiving groove 22 for collection.

[0031] Further, one end of the receiving groove 22 is horizontally connected to one end of the water storage tank 6. The water storage tank 6 is provided with a cleaning port 23 at this place. A first cut-off valve, a slag discharge pipe, and a second cut-off valve are successively provided outside the water storage tank 6 at the cleaning port 23. For the convenience of cleaning the equipment without stopping, when a certain amount of impurities are collected in the receiving groove 22, a pushing device needs to be used to push the impurities to the cleaning port 23. Specifically, first open the first cut-off valve, then cooperate with the pushing device to push out the impurities, then close the first cut-off valve, relieve the pressure of the slag discharge pipe, then open the second cut-off valve to empty, and then clean out the internal impurities. Specifically, a slag pushing device is provided inside the water storage tank 6. The slag pushing device includes a linear motor. The linear motor is arranged inside the receiving groove 22 along the length direction of the receiving groove 22. A push plate matched with the inner wall of the receiving groove 22 is provided on the screw shaft of the linear motor. As Figure 6As shown, by rotating the screw shaft of the linear motor driver arranged in the water storage tank 6, the push plate is pushed from the left end to the right side and stacked on the right side. Then, the push plate moves to the left end. After the impurities are stacked on the right end, the first cut-off valve is opened to push the stacked impurities outwards, and then the cleaning can be carried out as shown before. In actual use, other devices can also be set to push the push plate, such as a cylinder, etc.

[0032] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A steam recovery device for a feed mill, characterized in that, It includes a steam generator (1), a steam using device (2), and a condensate storage device (3). The steam outlet (7) end of the steam generator (1) is connected to the steam using device (2), and the outlet end of the steam using device (2) is connected to the condensate storage device (3). A condensate circulation pump (4) is provided between the condensate storage device (3) and the steam generator (1). The condensate circulation pump (4) pumps the condensate to the steam generator (1) to form a recycling loop. The condensate storage device (3) includes a water separator (5) and a water storage tank (6). The outlet end of the steam using device (2) is connected to the water separator (5). The water separator (5) is provided with a steam outlet (7) and a condensate outlet (8). The steam outlet (7) is connected to the steam generator (1), and the condensate outlet (8) is connected to the water storage tank (6). The water separator (5) includes a tank body (10). One side of the tank body (10) is provided with a water-vapor mixing inlet (11). The bottom of the tank body (10) is a condensate tank (12). The upper part of the tank body (10) is provided with a grating layer (13). The water separator (5) is also provided with a spray circulation pump (14). The inlet pipe of the spray circulation pump (14) is connected to the bottom of the condensate tank (12), and the outlet pipe (15) of the spray circulation pump (14) is connected to the upper side of the grating layer (13). The end of the outlet pipe (15) is located inside the water separator (5), and a nozzle (16) for spraying downward onto the grating layer (13) is provided at the end of the outlet pipe (15). The water-vapor mixing inlet (11) is connected to an L-shaped pipe (17) inside the tank body (10). The horizontal pipe of the L-shaped pipe (17) is located above the grating layer (13), and the end of the horizontal pipe is located at the central part of the grating layer (13). A vertical pipe is vertically connected to the end of the horizontal pipe. The vertical pipe passes through the grating layer (13) downward, and a flared mouth (18) with a gradually expanding downward opening is connected to the lower end of the vertical pipe. A conical distribution cone (19) is provided below the flared mouth (18). A central shaft (24) is provided along the axis inside the water storage tank (6). A plurality of radial rods (25) are circumferentially provided on the side of the central shaft (24) and are connected to a circular ring part (20). The other end of the central shaft (24) is provided with a reduction motor (26) outside the water storage tank (6).

2. The steam recovery device for a feed mill according to claim 1, characterized in that, It also includes a water filtration device (9). The water outlet of the water filtration device (9) supplies water to the steam generator (1), and the water filtration device (9) filters and softens the raw water.

3. The steam recovery device for a feed mill according to claim 1, wherein, An iron magnetic impurity removal structure is provided inside the water storage tank (6). The water storage tank (6) is a horizontal tank with a cylindrical inner wall. The iron magnetic impurity removal structure includes a circular ring part (20) rotatably connected around the axis of the water storage tank (6). At least a magnetic component (21) is provided on the inner wall of the circular ring part (20). A receiving groove (22) is provided above the liquid level inside the water storage tank (6). One end of the receiving groove (22) extends to the inside of the circular ring part (20), and the receiving groove (22) is arranged upward and close to the upper side of the circular ring part (20). The other end of the receiving groove (22) extends to the cleaning port (23).

4. The steam recovery device for a feed mill according to claim 3, wherein One end of the receiving groove (22) is horizontally connected to one end of the water storage tank (6). The water storage tank (6) is provided with a cleaning port (23) at this position. A first cut-off valve, a slag discharge pipe, and a second cut-off valve are successively arranged outside the water storage tank (6) at the cleaning port (23).

5. The steam recovery device for a feed mill according to claim 4, characterized in that, A slag pushing device is arranged in the water storage tank (6). The slag pushing device includes a linear motor. The linear motor is arranged inside the receiving groove (22) along the length direction of the receiving groove (22). A push plate that cooperates with the inner wall of the receiving groove (22) is arranged on the screw shaft of the linear motor.

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