Efficient recycling device for steam condensate heat

Abstract

The invention belongs to the technical field of steam condensate waste heat recovery, and relates to a steam condensate heat efficient recycling device which comprises a heat exchange buffer tank, a steam water inlet pipe and a steam water outlet pipe are arranged on the heat exchange buffer tank, the steam water outlet pipe is connected with a filter box, and the filter box is connected with a water storage tank. A disc-shaped heat exchange assembly and a blowout prevention assembly corresponding to the steam inlet pipe are arranged in the heat exchange buffer tank, and a manhole is formed in the heat exchange buffer tank. Heat of steam and condensed water directly discharged by a traditional drain valve is recycled, heat exchange of materials is achieved through high-temperature condensed water in the heat exchange buffer tank, the steam in the tank preheats the materials needing to be heated, and therefore raw materials and time needing to be consumed in the reheating process are reduced, and the energy consumption is reduced. The production and processing cost is reduced through heat recovered through steam condensate, secondary heat exchange is conducted through the heat exchanger, heat energy of the condensate is fully utilized, meanwhile, the condensate is stored after being filtered through the filter box, and recycling of the condensate is achieved.

Description

Technical Field

[0001] The invention relates to a steam condensation heat efficient recovery and utilization device, belonging to the technical field of steam condensation waste heat recovery. Background Art

[0002] Steam is widely used in various industries as a clean and safe energy carrier, such as power generation, petroleum, chemical industry, printing and dyeing, papermaking, textile, brewing, rubber, ceramics and other industrial fields. After releasing the latent heat of vaporization in various steam-using equipment, steam becomes saturated condensate at almost the same temperature and pressure. The heat of condensate can reach 20% to 30% of the total heat of steam, and the higher the pressure and temperature, the more heat the condensate has, and the greater the proportion of the total heat of steam. Under traditional circumstances, equipment will be equipped with steam traps and other components to directly discharge steam condensate, wasting the heat and water resources of steam and condensate.

[0003] The Chinese invention patent with the existing announcement number CN115823562B, the steam condensate waste heat recovery device without steam trap comprises a main steam pipeline, a primary flash tank, and a secondary flash tank; a steam mixer is provided on the upper part of the inner cavity of the primary flash tank; the steam mixer has a steam diversion channel which gradually narrows in the length direction and a steam mixing chamber arranged around the outside of the steam diversion channel; the narrow end of the steam diversion channel is connected to the steam mixing chamber; the wide end of the steam diversion channel is connected to the inner cavity of the primary flash tank; a mixed steam outlet, a low-pressure steam inlet, and a first condensate outlet are provided on the primary flash tank; the mixed steam outlet and the low-pressure steam inlet are respectively connected to the steam mixing chamber; the main steam pipeline is connected to the mixed steam outlet; a low-pressure steam outlet and a first condensate inlet are provided on the secondary flash tank; the low-pressure steam outlet is connected to the low-pressure steam inlet; the first condensate inlet is connected to the first condensate outlet; a plurality of baffles are provided in the steam diversion channel along its length direction; and through holes are distributed on the baffles.

[0004] The prior art has the following technical defects:

[0005] The above technical solution performs secondary flash evaporation on the condensed water after heat exchange and then transports the steam to the required equipment through a pipeline. However, the temperature of the steam will decrease during the pipeline transportation process, resulting in heat loss, and new condensed water will be generated in the pipeline. Water and steam will coexist at the air inlet of the steam-using equipment, and the steam-using equipment will not be able to work properly. Summary of the invention

[0006] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a steam condensate heat efficient recovery and utilization device to achieve heat exchange of materials, use steam to preheat the materials that need to be heated, thereby reducing the raw materials and time required for reheating, and then reduce the production and processing costs through the heat recovered by steam condensate, and perform secondary heat exchange through a heat exchanger to fully utilize the thermal energy of the condensate, and at the same time, filter the condensate through a filter box and store it to achieve the recovery and utilization of the condensate.

[0007] The steam condensate heat efficient recovery and utilization device described in the present invention comprises a heat exchange buffer tank, which is provided with a steam inlet pipe and an outlet pipe, the outlet pipe is connected to a filter box, the filter box is connected to a water storage tank, a disc-type heat exchange component and a blowout prevention component corresponding to the steam inlet pipe are arranged in the heat exchange buffer tank, and a manhole is arranged on the heat exchange buffer tank.

[0008] The disc-type heat exchange assembly comprises a feed pipe and a discharge pipe, and the feed pipe and the discharge pipe are connected via a plurality of heat exchange discs, and the heat exchange contact area is increased by the heat exchange discs, thereby improving the heat exchange efficiency.

[0009] The heat exchange disk comprises a feed port connected to a feed pipe and a discharge port connected to a discharge pipe, and the feed port and the discharge port are connected via a spiral heat exchange tube. Since the raw water contains certain calcium and magnesium ions, scaling is easily generated during the heating and cooling process, while the overall structure of an ordinary heat exchanger is relatively large and the contact surface is relatively flat, which makes it easy for scale to adhere and accumulate, thereby reducing the heat exchange effect. The present invention performs heat exchange through multiple heat exchange disks, reduces a large area of ​​flat surface, thereby avoiding the accumulation of scale, and further ensuring its heat exchange efficiency and service life.

[0010] At least four spiral heat exchange tubes are provided, and the four spiral heat exchange tubes are evenly connected to the feed port and the discharge port. The multiple coils and multiple spiral heat exchange tubes can not only increase the heat exchange area, but also ensure the exchange flow rate, thereby improving the heat exchange efficiency. The spiral heat exchange tube can produce a certain wave shaking due to its overall shape characteristics when the internal material flow and external condensate fluctuate, thereby increasing the difficulty of scale adhesion and ensuring its heat exchange efficiency and service life.

[0011] The anti-blowout assembly is a anti-blowout baffle, which is fixedly connected to the inner wall of the heat exchange buffer tank. The anti-blowout baffle corresponds to the position of the steam inlet pipe. Since there is a certain pressure in the pipe, the steam and condensate will be ejected. The ejected condensate can be quickly collected through the anti-blowout baffle.

[0012] The anti-spray baffle is provided with a plurality of through holes.

[0013] A preheating pipe is provided on the top of the heat exchange buffer tank. The preheating pipe allows the material to be heated to be preheated by utilizing the steam heat in the heat exchange buffer tank when passing through the material, thereby reducing the heat and time required for processing. Preheating by utilizing steam heat reduces the energy and time required for heating the material, thereby reducing energy consumption.

[0014] The water outlet pipe of the heat exchange buffer tank is connected with a heat exchanger.

[0015] A pressure-stabilizing water tank is connected between the heat exchange buffer tank and the heat exchanger.

[0016] A water pump is connected between the heat exchanger and the pressure-stabilizing water tank, and a water pump is connected between the filter box and the water storage tank.

[0017] The pressure-stabilizing water tank is provided with a water tank bracket, the bottom of the pressure-stabilizing water tank is an inclined surface, the bottom of the lowest end of the pressure-stabilizing water tank is provided with a sewage outlet, and the bottom height of the end connected to the outlet pipe of the heat exchange buffer tank is lower than the bottom height of the end connected to the heat exchanger.

[0018] A drain outlet and a dirt baffle are also provided at the bottom of the pressure-stabilizing water tank. The dirt baffle is arranged between the drain outlet and the sewage outlet. When condensed water enters the pressure-stabilizing water tank from the heat exchange buffer tank, impurities in the water are precipitated near the sewage outlet through sedimentation static flow. The dirt baffle can prevent the water flow from carrying away the dirt, and the dirt can be discharged through the sewage outlet.

[0019] A wave-breaking plate is also provided in the middle of the pressure-stabilizing water tank to prevent the water flow entering the tank from shaking too much.

[0020] A filter screen support is arranged in the filter box, and a placement opening matched with the filter screen support is arranged on the filter box, and the filter screen support can be taken out and replaced through the placement opening.

[0021] The filter box is provided with a slideway adapted to the filter bracket, the filter bracket is slidably connected to the slideway, the placement port is arranged at the corresponding position of the slideway near one end of the water inlet of the filter box, and the filter box is provided with a removal port corresponding to the other end of the slideway, the filter bracket with the filter installed is placed in the placement port and the cover plate at the placement port is reset and fixed, when the water flows into the filter box and passes through the filter, the filter will filter the water flow, and when the filter blocks more impurities, it will be blocked, and the water flow rate will be reduced, while the water inlet of the filter box remains the same, which will cause the water pressure at the to-be-filtered position to increase, thereby pushing the filter bracket to move on the slideway, and when the filter bracket moves to the end, the filter needs to be replaced, at this time, the removal port is opened to take out the filter bracket and replace the new filter, and then it can be installed from the placement port and put into use again.

[0022] The filter box is provided with a display screen, and a position sensor is provided on the slide near the water outlet in the filter box. The position sensor is connected to the display screen. When the filter bracket moves to the end of the slide, the position sensor transmits a signal to the display screen, and the display screen prompts to replace the filter.

[0023] There is a gap between the two ends of the filter bracket and the inner wall of the filter box side plate. At this time, the filter sponge can be installed on both sides of the filter bracket so that the filter sponge is squeezed between the filter bracket and the filter box, thereby cleaning the inner wall of the filter box during filtering.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention recovers the heat of steam and condensed water directly discharged by the traditional steam trap, realizes heat exchange of materials through the high-temperature condensed water in the heat exchange buffer tank, and preheats the materials to be heated by the steam in the tank, thereby reducing the raw materials and time required for reheating, and further reducing the production and processing costs through the heat recovered by the steam condensed water. The heat exchanger is used for secondary heat exchange, which fully utilizes the thermal energy of the condensed water. At the same time, the condensed water is filtered and stored after being passed through the filter box, so as to realize the recycling of the condensed water. The steam trap is not used in the whole device, the condensed water and steam recovery rate is high, and the energy-saving effect is remarkable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a front view of the present invention,

[0027] Figure 2 is a rear view of the present invention,

[0028] Figure 3 is a schematic diagram of the structure of the heat exchange buffer tank in the present invention,

[0029] Figure 4 is a schematic diagram of the internal structure of the heat exchange buffer tank in the present invention,

[0030] Figure 5 is a schematic diagram of the structure of the disc-type heat exchange component in the present invention,

[0031] Figure 6 is a schematic diagram of the structure of the heat exchange disk in the present invention,

[0032] Figure 7 It is a structural schematic diagram of the pressure-stabilizing water tank in the present invention,

[0033] Figure 8 This is a front view of the pressure-stabilizing water tank in the present invention.

[0034] Fig. 9 It is a schematic diagram of the internal structure of the pressure-stabilizing water tank in the present invention,

[0035] Fig.10 It is a structural schematic diagram of the filter box in the present invention,

[0036] Fig.11 It is a schematic diagram of the internal structure of the filter box in the present invention.

[0037] In the figure: 1. heat exchange buffer tank; 2. manhole; 3. water outlet pipe; 4. pressure-stabilizing water tank; 5. filter box; 6. heat exchanger; 7. water storage tank; 8. steam inlet pipe; 9. preheating pipe; 10. anti-blowout baffle; 11. feed pipe; 12. heat exchange plate; 13. discharge pipe; 14. feed port; 15. discharge port; 16. spiral heat exchange tube; 17. water tank bracket; 18. sewage outlet; 19. sewage baffle; 20. drainage outlet; 21. wave-breaking board; 22. outlet; 23. placement port; 24. display screen; 25. filter bracket; 26. slide. DETAILED DESCRIPTION

[0038] Example 1

[0039] like Figure 1-2 As shown, the steam condensate heat efficient recovery and utilization device described in the present invention includes a heat exchange buffer tank 1, on which a steam inlet pipe 8 and a water outlet pipe 3 are provided, the water outlet pipe 3 is connected to a filter box 5, the filter box 5 is connected to a water storage tank 7, a disc-type heat exchange component and a blowout prevention component corresponding to the steam inlet pipe 8 are provided in the heat exchange buffer tank 1, and a manhole 2 is provided on the heat exchange buffer tank 1.

[0040] Working process or working principle:

[0041] When in use, the steam condensate is directly introduced into the heat exchange buffer tank 1 through the steam inlet pipe 8. Since there are both steam and condensate at the outlet, the outlet pressure is relatively high, resulting in spraying. The spraying can be avoided by the anti-spray assembly, so that the condensate can be collected and stored in time. When the condensate is collected at the bottom of the heat exchange buffer tank 1, the heat of the condensate is recovered and utilized through the disc-type heat exchange assembly. However, the temperature of the condensate after one heat exchange is still very high. The heat exchanger 6 is used for secondary heat exchange to make full use of the thermal energy of the condensate. The cooled condensate is a very good water replenishment raw material. Therefore, the impurities therein are filtered out by the filter box 5 and then enter the water storage tank 7 for storage, recovery and secondary utilization.

[0042] Example 2

[0043] like Figure 1 to Figure 6As shown, different from Example 1, the disc-type heat exchange component described in this embodiment includes a feed pipe 11 and a discharge pipe 13, and the feed pipe 11 and the discharge pipe 13 are connected by a plurality of heat exchange discs 12. The heat exchange contact area is increased by the heat exchange discs, thereby improving the heat exchange efficiency; the heat exchange disc 12 includes a feed port 14 connected to the feed pipe 11 and a discharge port 15 connected to the discharge pipe 13, and the feed port 14 and the discharge port 15 are connected by a spiral heat exchange tube 16; at least four spiral heat exchange tubes 16 are provided, and the four spiral heat exchange tubes 16 are evenly connected to the feed port 14 and the discharge port 15. Through multiple discs and multiple spiral heat exchange tubes 16, it is possible to increase the heat exchange area and ensure the exchange flow rate, thereby improving the heat exchange efficiency; the blowout prevention component is a blowout prevention baffle 10, which is fixedly connected to the inner wall of the heat exchange buffer tank 1, and the blowout prevention baffle 10 is fixedly connected to the inner wall of the heat exchange buffer tank 1. The plate 10 corresponds to the position of the steam inlet pipe 8. Due to a certain pressure in the pipe, the steam and condensed water will be ejected, and the ejected condensed water can be quickly collected through the anti-spray baffle 10; the anti-spray baffle 10 is provided with a plurality of through holes; a preheating pipe 9 is provided on the top of the heat exchange buffer tank 1, and the preheating pipe 9 can make the material to be heated be preheated by the steam heat in the heat exchange buffer tank 1 when passing through, thereby reducing the heat and time required for processing, and using the steam heat for preheating to reduce the energy and time required for heating the material, thereby reducing energy consumption; the outlet pipe 3 of the heat exchange buffer tank 1 is connected to the heat exchanger 6; a pressure-stabilizing water tank 4 is connected between the heat exchange buffer tank 1 and the heat exchanger 6; a water pump is connected between the heat exchanger 6 and the pressure-stabilizing water tank 4, and a water pump is connected between the filter box 5 and the water storage tank 7.

[0044] Working process or working principle:

[0045] When in use, the steam condensate is directly introduced into the heat exchange buffer tank 1 through the steam inlet pipe 8. Since there are both steam and condensate at the outlet, the outlet pressure is relatively high, resulting in spraying. The spraying can be avoided by the anti-spray assembly, so that the condensate can be collected and stored in time. When the condensate is collected at the bottom of the heat exchange buffer tank 1, the heat of the condensate is recovered and utilized through the disc-type heat exchange assembly. However, the temperature of the condensate after one heat exchange is still very high. The heat exchanger 6 is used for secondary heat exchange to make full use of the thermal energy of the condensate. The cooled condensate is a very good water replenishment raw material. Therefore, the impurities therein are filtered out by the filter box 5 and then enter the water storage tank 7 for storage, recovery and secondary utilization.

[0046] Example 3

[0047] like Figure 7 to Figure 9As shown, different from other embodiments, the pressure-stabilizing water tank 4 described in this embodiment is provided with a water tank bracket 17, the bottom of the pressure-stabilizing water tank 4 is an inclined surface, and the bottom of the pressure-stabilizing water tank 4 at the lowest end is provided with a sewage outlet 18, and the bottom height of the end connected to the outlet pipe 3 of the heat exchange buffer tank 1 is lower than the bottom height of the end connected to the heat exchanger 6; the bottom of the pressure-stabilizing water tank 4 is also provided with a drain outlet 20 and a dirt baffle 19, and the dirt baffle 19 is arranged between the drain outlet 20 and the sewage outlet 18. When condensed water enters the pressure-stabilizing water tank 4 from the heat exchange buffer tank 1, impurities in the water are precipitated near the sewage outlet 18 through sedimentation static flow. The dirt baffle 19 can prevent the water flow from carrying away the dirt, and it can be discharged through the sewage outlet 18; the middle part of the pressure-stabilizing water tank 4 is also provided with a wave-breaking plate 21 to prevent the water flow entering the tank from shaking too much.

[0048] Working process or working principle:

[0049] When the condensed water after heat exchange flows from the heat exchange buffer tank 1 into the pressure-stabilizing water tank 4, the water first flows into the space formed between the dirt baffle 19 and the inner wall of the pressure-stabilizing water tank 4 for steady sedimentation. The impurities in the water are precipitated near the sewage outlet 18 through the sedimentation static flow. The dirt baffle 19 can prevent the water flow from carrying away the dirt, and the dirt can be discharged through the sewage outlet 18. When the incoming water flow is large, it is easy to generate waves in the tank. The wave-breaking plate 21 can prevent the water surface in the tank from churning, thereby ensuring stability when the water is discharged.

[0050] Example 4

[0051] like Figure 10-11As shown, different from other embodiments, the filter box 5 described in this embodiment is provided with a filter holder 25, and the filter box 5 is provided with a placement port 23 adapted to the filter holder 25, through which the filter holder 25 can be taken out and the filter on it can be replaced; the filter box 5 is provided with a slideway 26 adapted to the filter holder 25, and the filter holder 25 is slidably connected to the slideway 26, and the placement port 23 is arranged at a corresponding position of the slideway 26 close to one end of the water inlet of the filter box 5, and the filter box 5 is provided with a removal port 22 corresponding to the other end of the slideway 26, the filter holder 25 with the filter installed is placed in the placement port 23 and the cover plate at the placement port 23 is reset and fixed, when water flows into the filter box 5 and passes through the filter, the filter will filter the water, And when the filter screen blocks more impurities, it will be blocked, and the water flow rate will be reduced, while the water inlet of the filter box 5 remains the same, which will cause the water pressure at the filter to be filtered to increase, thereby pushing the filter screen holder 25 to move on the slide 26. When the filter screen holder 25 moves to the end, the filter screen needs to be replaced. At this time, the removal port 22 is opened to take out the filter screen holder 25 and replace the new filter screen. After installing it from the placement port 23, it can be put into use again; the filter box 5 is provided with a display screen 24, and a position sensor is provided on the slide 26 near the water outlet in the filter box 5. The position sensor is connected to the display screen 24. When the filter screen holder 25 moves to the end of the slide 26, the signal is transmitted to the display screen 24 through the position sensor, and the display screen 24 prompts to replace the filter screen.

[0052] Working process or working principle:

[0053] Condensed water will inevitably produce impurities and the like during the circulation process in the equipment and pipelines, as well as calcium and magnesium ions contained in the raw water itself, which will condense into solid scale through boiling cooling. When in use, the filter holder 25 equipped with the filter is assembled to the slide 26 in the filter box 5 through the placement port 23, and the cover seal of the placement port 23 is reset. When the condensed water passes through the filter box 5, when the water flows into the filter box 5 and passes through the filter, the filter will filter the water, and when the filter blocks more impurities, it will be blocked. At that time, the water flow rate will be reduced, while the water inlet of the filter box 5 remains the same, which will cause the water pressure at the filter to be filtered to increase, thereby pushing the filter holder 25 to move on the slide 26. When the filter holder 25 moves to the end of the slide 26, the signal is transmitted to the display screen 24 through the position sensor, and the display screen 24 prompts to replace the filter.

[0054] The present invention recovers the heat of steam and condensed water directly discharged by the traditional steam trap, realizes heat exchange of materials through the high-temperature condensed water in the heat exchange buffer tank, and preheats the materials to be heated by the steam in the tank, thereby reducing the raw materials and time required for heating, and further reducing the production and processing cost through the heat recovered by the steam condensed water. The heat exchanger is used for secondary heat exchange, which fully utilizes the thermal energy of the condensed water. At the same time, the condensed water is filtered and stored after being passed through the filter box, so as to realize the recycling of the condensed water. The steam trap is not used in the whole device, the condensed water and steam recovery rate is high, and the energy-saving effect is remarkable.

[0055] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A steam condensation heat efficient recovery and utilization device, characterized in that: The invention comprises a heat exchange buffer tank (1), wherein the heat exchange buffer tank (1) is provided with a steam water inlet pipe (8) and a water outlet pipe (3), the water outlet pipe (3) is connected to a filter box (5), the filter box (5) is connected to a water storage tank (7), a disc-shaped heat exchange component and a blowout prevention component corresponding to the steam water inlet pipe (8) are provided in the heat exchange buffer tank (1), and a manhole (2) is provided on the heat exchange buffer tank (1).

2. The steam condensation heat efficient recovery and utilization device according to claim 1 is characterized in that: The disc-type heat exchange assembly comprises a feed pipe (11) and a discharge pipe (13), and the feed pipe (11) and the discharge pipe (13) are connected via a plurality of heat exchange discs (12).

3. The steam condensation heat efficient recovery and utilization device according to claim 2 is characterized in that: The heat exchange plate (12) comprises a feed port (14) connected to the feed pipe (11) and a discharge port (15) connected to the discharge pipe (13); the feed port (14) and the discharge port (15) are connected via a spiral heat exchange tube (16).

4. The steam condensation heat efficient recovery and utilization device according to claim 3 is characterized in that: At least four spiral heat exchange tubes (16) are provided, and the four spiral heat exchange tubes (16) are evenly connected to the feed port (14) and the discharge port (15).

5. The steam condensation heat efficient recovery and utilization device according to claim 1 is characterized in that: The anti-blowout component is an anti-blowout baffle (10), which is fixedly connected to the inner wall of the heat exchange buffer tank (1), and the position of the anti-blowout baffle (10) corresponds to the position of the steam water inlet pipe (8).

6. The steam condensation heat efficient recovery and utilization device according to claim 5 is characterized in that: The anti-spray baffle (10) is provided with a plurality of through holes.

7. The steam condensation heat efficient recovery and utilization device according to claim 1 is characterized in that: A preheating pipe (9) is provided at the top of the heat exchange buffer tank (1).

8. The device for efficiently recovering and utilizing the heat of steam condensation according to any one of claims 1 to 7, characterized in that: The water outlet pipe (3) of the heat exchange buffer tank (1) is connected to a heat exchanger (6).

9. The steam condensation heat efficient recovery and utilization device according to claim 8 is characterized in that: A pressure-stabilizing water tank (4) is connected between the heat exchange buffer tank (1) and the heat exchanger (6).

10. The steam condensation heat efficient recovery and utilization device according to claim 9, characterized in that: A water pump is connected between the heat exchanger (6) and the pressure-stabilizing water tank (4), and a water pump is connected between the filter box (5) and the water storage tank (7).

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