A paper machine steam condensate tank secondary steam recycling structure

Abstract

The utility model relates to a kind of paper machine steam condensate tank secondary steam reuse structure, including water replenishing pump, hot water tank, first condensate tank, second condensate tank and heat exchanger, first condensate tank upside is provided with filter mechanism, filter mechanism includes filter box, first filter plate and second filter plate, filter box is set on the upside of first condensate tank, and connecting pipe is set between filter box and first condensate tank, two plug-in slots are set in filter box side, two limit insertion slots are set in filter box inner wall circumferential side, two limit insertion slots are respectively corresponding with two plug-in slots. The utility model is through filter mechanism, when the secondary steam in first condensate tank is transported to heat exchanger, secondary steam will first enter filter mechanism and be filtered and purified, so that the impurities carried in secondary steam are filtered and intercepted, avoid secondary steam into heat exchanger, bring impurities into heat exchanger, cause to affect the use of heat exchanger after long time use.

Description

Technical Field

[0001] This utility model relates to the field of paper machine technology, and in particular to a secondary steam reuse structure for a paper machine steam condensate tank. Background Technology

[0002] Corrugated base paper is one of the essential materials for producing corrugated cardboard. Corrugated base paper requires good fiber bonding strength, a smooth surface, good density and stiffness, and a certain degree of elasticity to ensure that the resulting cartons have shock-proof and pressure-resistant capabilities. The corrugated base paper machine is the core equipment in the corrugated cardboard production line used to process the base paper.

[0003] A search revealed that Chinese Patent CN212731107U discloses a secondary steam reuse structure for a steam condensate tank. The structure includes a main body comprising a condensate tank and a heat exchanger support. A steam return pipe is located on one side of the top of the condensate tank, and a steam pipe is located on the other side of the steam return pipe opposite the top of the condensate tank. A heat exchanger is connected to the steam pipe and the steam pipe on one side of the condensate tank. The heat exchanger is located on the top of the heat exchanger support, and a steam pipe connection end and a clean water pipe connection end are located on the side of the heat exchanger facing the condensate tank. This invention, by incorporating a secondary steam reuse structure, reduces the flow time of steam within the pipes, thereby reducing heat loss and saving steam. Furthermore, using secondary steam to heat clean water ensures the temperature of the warm water tank and allows for water replenishment to the warm water tank using the height difference, reducing equipment costs and saving electricity.

[0004] In actual use, this patent has the following drawbacks:

[0005] The patent does not include a filtration mechanism. Since industrial steam is usually transported through carbon steel pipes, when the steam is stored in the steam condensate tank and turns into condensate, it may carry impurities such as rust and dirt. Therefore, the secondary steam may also carry impurities, making it easy for the secondary steam to carry impurities into the heat exchanger. After long-term use, this can easily affect the operation of the heat exchanger. Utility Model Content

[0006] In view of the technical problem that the existing technology does not have a filtration mechanism, and since industrial steam is usually transported through carbon steel pipes, the steam may carry impurities such as rust and dirt when it is stored in the steam condensate tank and becomes condensate. As a result, the secondary steam may also carry impurities, which can easily lead to the secondary steam carrying impurities into the heat exchanger when it enters the heat exchanger. This can affect the use of the heat exchanger after long-term use. The present invention provides a secondary steam recycling structure for paper machine steam condensate tank.

[0007] The technical solution adopted by this utility model is: a secondary steam reuse structure for a paper machine steam condensate tank, including a water replenishment pump, a warm water tank, a first condensate tank, a second condensate tank, and a heat exchanger. A filtration mechanism is provided on the upper side of the first condensate tank. The filtration mechanism includes a filter box, a first filter plate, and a second filter plate. The filter box is located on the upper side of the first condensate tank, and a connecting pipe is provided between the filter box and the first condensate tank. Two insertion slots are opened on one side of the filter box, and two limiting slots are opened on the circumferential side of the inner wall of the filter box. The two limiting slots correspond to the two insertion slots respectively. The first filter plate and the second filter plate are movably inserted into the two limiting slots through the two insertion slots respectively. The first filter plate is located on the upper side of the second filter plate.

[0008] Furthermore, two fixing mechanisms are provided on one side of the filter box. The two fixing mechanisms are located on one side of the two insertion slots, and the two fixing mechanisms are respectively connected to the first filter plate and the second filter plate.

[0009] Furthermore, the fixing mechanism includes a plug-in plate, a fixing block, a sliding rod, and a snap-fit ​​block, with two of each of the fixing block, the sliding rod, and the snap-fit ​​block.

[0010] Furthermore, the fixing block is fixedly installed on one side of the filter box, the plug-in plate is disposed between the two fixing blocks, and sliding cavities are opened at both ends of the plug-in plate. The sliding rod is slidably installed in the sliding cavity, the snap-fit ​​block is fixedly installed on one end of the sliding rod, and snap-fit ​​grooves are opened on one side of the fixing block. The snap-fit ​​block is movably inserted into the snap-fit ​​grooves, and a first spring is provided between the sliding rod and the inner wall of the sliding cavity.

[0011] Furthermore, a groove is provided on one side of the middle part of the plug plate, and a pull rod is fixedly installed at one end of each of the two sliding rods. The two pull rods correspond to each other, and one end of the pull rod is slidably disposed in the groove.

[0012] Furthermore, a storage groove is provided on one side of the inner wall of the groove, and a pulling column is slidably installed on one side of the inner wall of the storage groove. A limit plate is provided at the upper end of the pulling column, and the limit plate is located between the two pulling rods. A second spring is provided between the limit plate and the inner wall of the storage groove.

[0013] Furthermore, a water supply pipe is provided between the water replenishment pump and the refrigerant input end of the heat exchanger, a return water pipe is provided between the refrigerant output end of the heat exchanger and the warm water tank, a gas supply pipe is provided between the heat medium input end of the heat exchanger and the filter box, and a recovery pipe is provided between the heat medium output end of the heat exchanger and the second condensate tank.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model uses a filtration mechanism to filter and purify the secondary steam in the first condensate tank when it is transported to the heat exchanger. This filters and intercepts impurities carried in the secondary steam, preventing them from being carried into the heat exchanger and affecting its operation after long-term use. This improves the stability and practicality of the reuse structure.

[0016] 2. Furthermore, through the insertion slot and fixing mechanism, this utility model enables workers to easily and quickly disassemble the first and second filter plates when it is necessary to disassemble and clean them, and facilitates subsequent installation and fixing, thereby improving the convenience of cleaning the first and second filter plates. Attached Figure Description

[0017] Figure 1 This is a front perspective view of the entire utility model;

[0018] Figure 2 This is a rear-view perspective view of the present invention;

[0019] Figure 3 This is a cross-sectional view of the filter box of this utility model;

[0020] Figure 4 This is a cross-sectional view of the fixing mechanism of this utility model.

[0021] The following are labeled in the diagram: 1. Water supply pump; 2. Warm water tank; 3. First condensate tank; 4. Second condensate tank; 5. Heat exchanger; 6. Filtration mechanism; 7. Gas supply pipe; 8. Recovery pipe; 9. Return water pipe; 10. Water supply pipe; 11. Filter box; 12. Insertion slot; 13. Limiting slot; 14. First filter plate; 15. Second filter plate; 16. Fixing mechanism; 19. Insertion plate; 20. Fixing block; 21. Snap-fit ​​slot; 22. Sliding cavity; 23. Sliding rod; 24. Snap-fit ​​block; 25. First spring; 26. Pull rod; 27. Storage slot; 28. Limiting plate; 29. ​​Pull column. Detailed Implementation

[0022] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following is in conjunction with the appendix Figures 1-4 The present invention will be further described below.

[0025] To address the problems existing in the background technology, this application proposes the following technical solution: a secondary steam reuse structure for a paper machine steam condensate tank.

[0026] The specific technical solution includes a water supply pump 1, a warm water tank 2, a first condensate tank 3, a second condensate tank 4, and a heat exchanger 5. A water supply pipe 10 is connected between the water supply pump 1 and the refrigerant input end of the heat exchanger 5. A return water pipe 9 is connected between the refrigerant output end of the heat exchanger 5 and the warm water tank 2. A gas supply pipe 7 is connected between the heat medium input end of the heat exchanger 5 and the filter box 11. A recovery pipe 8 is connected between the heat medium output end of the heat exchanger 5 and the second condensate tank 4. The water supply pump 1 delivers external clean water to the heat exchanger 5 through the water supply pipe 10. Simultaneously, the first condensate tank 3 delivers secondary steam to the heat exchanger 5 through the gas supply pipe 7, allowing the secondary steam to heat the clean water. The heated clean water enters the warm water tank 2 through the return water pipe 9, while the secondary steam enters the second condensate tank 4 through the recovery pipe 8. Pressure sensors and pressure relief valves are installed on the second condensate tank 4, the first condensate tank 3, and the second condensate tank 4. A filter mechanism 6 is installed on the upper side of the first condensate tank 3. The filter mechanism 6 includes a filter box 11, a first filter plate 14, and a second filter plate 15. The filter box 11 is located on the upper side of the first condensate tank 3, and a connecting pipe is provided between the filter box 11 and the first condensate tank 3. Two insertion slots 12 are opened on one side of the filter box 11, and two limiting slots 13 are opened on the circumference of the inner wall of the filter box 11. The two limiting slots 13 correspond to the two insertion slots 12 respectively. The first filter plate 14 and the second filter plate 15 are movably inserted into the two limiting slots 13 through the two insertion slots 12 respectively. The first filter plate 14 is located on the upper side of the second filter plate 15.

[0027] Reference Figure 3 and Figure 4As shown, two fixing mechanisms 16 are provided on one side of the filter box 11. The two fixing mechanisms 16 are located on one side of the two insertion slots 12, and are respectively connected to the first filter plate 14 and the second filter plate 15. The fixing mechanism 16 includes an insertion plate 19, a fixing block 20, a sliding rod 23, and a locking block 24. There are two fixing blocks 20, two sliding rods 23, and two locking blocks 24. The fixing blocks 20 are fixedly installed on one side of the filter box 11. The insertion plate 19 is located between the two fixing blocks 20. Sliding cavities 22 are opened at both ends of the insertion plate 19. The sliding rods 23 are slidably installed on the filter box 11. The snap-fit ​​block 24 is fixedly installed at one end of the sliding rod 23 inside the sliding cavity 22. The fixed block 20 has a snap-fit ​​groove 21 on one side. The snap-fit ​​block 24 is movably inserted into the snap-fit ​​groove 21. A first spring 25 is provided between the sliding rod 23 and the inner wall of the sliding cavity 22. A groove is provided on one side of the middle part of the plug-in plate 19. Pull rods 26 are fixedly installed at one end of each of the two sliding rods 23. The two pull rods 26 correspond to each other, and one end of the pull rod 26 is slidably set in the groove. A sealing rubber ring is provided between the plug-in plate 19 and one side of the filter box 11, which can improve the sealing effect of the plug-in plate 19 on the plug-in groove 12.

[0028] Reference Figure 4 As shown, a storage groove 27 is provided on one side of the inner wall of the groove. A pull post 29 is slidably installed on one side of the inner wall of the storage groove 27. A limit plate 28 is provided at the upper end of the pull post 29. The limit plate 28 is located between the two pull rods 26. A second spring is provided between the limit plate 28 and the inner wall of the storage groove 27. By pulling the pull post 29 downward, the limit plate 28 is driven to retract into the storage groove 27, which can release the limitation on the two pull rods 26. By releasing the pull post 29, the limit plate 28 is moved between the two pull rods 26 by the elastic force of the second spring, which can fix and limit the two pull rods 26, so that the pull rods 26 cannot move, ensuring the stability of the plug plate 19 when it is fixed between the fixing blocks 20.

[0029] To ensure that those skilled in the art can fully understand the technical solution, this application provides the following overall overview:

[0030] In use, when the secondary steam in the first condensate tank 3 is delivered to the heat exchanger 5, the secondary steam first enters the filter box 11. The secondary steam enters through the bottom of the filter box 11 and then flows upward. During the upward flow of the secondary steam, it first passes through the first filter plate 14, which performs preliminary filtration of the secondary steam, so that the coarse impurities contained in the secondary steam are filtered out. Then it passes through the second filter plate 15, which performs secondary filtration of the secondary steam, so that the fine impurities in the secondary steam are filtered out. The secondary steam that has passed through the first filter plate 14 and the second filter plate 15 enters the heat exchanger 5 through the gas delivery pipe 7, thereby ensuring the purity of the secondary steam.

[0031] When it is necessary to disassemble and clean the first filter plate 14 and the second filter plate 15, by simultaneously pressing the two pull rods 26, the pull rods 26 move, which can drive the sliding rod 23 to move. The sliding rod 23 moves, which can drive the locking block 24 to move. The locking block 24 moves, which can disengage from the locking groove 21 and retract into the sliding cavity 22, thereby releasing the fixed limit between the plug plate 19 and the fixing block 20. Then, by pulling the plug plate 19, the plug plate 19 can drive the first filter plate 14 or the second filter plate 15 connected to it to move, so that the first filter plate 14 or the second filter plate 15 moves to the outside of the filter box 11 along the limiting slot 13 and the plug groove 12, which makes it easier for the staff to disassemble and clean the first filter plate 14 and the second filter plate 15.

[0032] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A structure for secondary steam reuse in a paper machine steam condensate tank, characterized in that, The system includes a water pump (1), a warm water tank (2), a first condensate tank (3), a second condensate tank (4), and a heat exchanger (5). A filter mechanism (6) is provided on the upper side of the first condensate tank (3). The filter mechanism (6) includes a filter box (11), a first filter plate (14), and a second filter plate (15). The filter box (11) is located on the upper side of the first condensate tank (3), and a connecting pipe is provided between the filter box (11) and the first condensate tank (3). Two insertion slots (12) are opened on one side of the filter box (11), and two limiting slots (13) are opened on the circumference of the inner wall of the filter box (11). The two limiting slots (13) correspond to the two insertion slots (12) respectively. The first filter plate (14) and the second filter plate (15) are movably inserted into the two limiting slots (13) through the two insertion slots (12) respectively. The first filter plate (14) is located on the upper side of the second filter plate (15).

2. The secondary steam reuse structure for a paper machine steam condensate tank according to claim 1, characterized in that, Two fixing mechanisms (16) are provided on one side of the filter box (11). The two fixing mechanisms (16) are located on one side of the two insertion slots (12) respectively, and the two fixing mechanisms (16) are connected to the first filter plate (14) and the second filter plate (15) respectively.

3. The secondary steam reuse structure for a paper machine steam condensate tank according to claim 2, characterized in that, The fixing mechanism (16) includes a plug plate (19), a fixing block (20), a sliding rod (23), and a snap-fit ​​block (24), and there are two of each of the fixing block (20), the sliding rod (23), and the snap-fit ​​block (24).

4. The secondary steam reuse structure for a paper machine steam condensate tank according to claim 3, characterized in that, The fixing block (20) is fixedly installed on one side of the filter box (11). The plug plate (19) is disposed between the two fixing blocks (20). The plug plate (19) has sliding cavities (22) at both ends. The sliding rod (23) is slidably installed in the sliding cavity (22). The snap-fit ​​block (24) is fixedly installed at one end of the sliding rod (23). The fixing block (20) has snap-fit ​​grooves (21) on one side. The snap-fit ​​block (24) is movably inserted into the snap-fit ​​grooves (21). A first spring (25) is provided between the sliding rod (23) and the inner wall of the sliding cavity (22).

5. The secondary steam reuse structure for a paper machine steam condensate tank according to claim 4, characterized in that, The plug plate (19) has a groove on one side of the middle part. Each of the two sliding rods (23) has a pull rod (26) fixedly installed at one end. The two pull rods (26) correspond to each other, and one end of the pull rod (26) is slidably disposed in the groove.

6. The secondary steam reuse structure for a paper machine steam condensate tank according to claim 5, characterized in that, A storage groove (27) is provided on one side of the inner wall of the groove. A pull column (29) is slidably installed on one side of the inner wall of the storage groove (27). A limit plate (28) is provided at the upper end of the pull column (29). The limit plate (28) is located between the two pull rods (26). A second spring is provided between the limit plate (28) and the inner wall of the storage groove (27).

7. The secondary steam reuse structure for a paper machine steam condensate tank according to claim 1, characterized in that, A water supply pipe (10) is provided between the water pump (1) and the refrigerant input end of the heat exchanger (5), a return water pipe (9) is provided between the refrigerant output end of the heat exchanger (5) and the warm water tank (2), a gas supply pipe (7) is provided between the heat medium input end of the heat exchanger (5) and the filter box (11), and a recovery pipe (8) is provided between the heat medium output end of the heat exchanger (5) and the second condensate tank (4).

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