Waste heat recovery device for drying link of paper mill
By designing a steam-water separation mechanism and a vibrating water filtration device, the problem of reduced energy quality caused by high water content in the waste heat recovery device was solved, achieving efficient filtration and effective utilization of waste heat, thus improving production efficiency.
Patent Information
- Application Number
- CN202520309246.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Existing waste heat recovery devices suffer from reduced energy quality and poor preheating or heating effects when utilizing waste heat from steam due to high water content, which affects production efficiency.
The design incorporates a gas-water separation mechanism equipped with an intercepting mesh and an adsorption plate. A double cam drives the ring plate to vibrate, which, combined with the vibration filtration mechanism, achieves efficient filtration of water and impurities while ensuring unobstructed filtration channels.
It significantly reduces the moisture content of steam, improves the quality of waste heat, ensures efficient operation of subsequent utilization processes, prevents impurities from clogging, and improves production efficiency.
Smart Images
Figure CN223901508U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of waste heat recovery, especially relates to a waste heat recovery device for drying link of paper mill. BACKGROUND
[0002] In the production process of paper mill, the drying link is the key part of energy consumption. The waste heat recovery device for drying link of paper mill emerges as the times require, and its main role is to recycle and reuse the large amount of waste heat generated in the drying process, aiming at reducing energy consumption, reducing production cost, practicing environmental protection concept and improving resource utilization efficiency.
[0003] However, when the current waste heat recovery device recovers water vapor waste heat, the water content in the waste heat is large, which reduces the energy quality of the waste heat in the aspect of waste heat utilization. When the waste heat with high water content is used to preheat raw materials or heat water in other links, a large amount of heat is consumed for water evaporation, the heat used for effective heating is reduced, and the preheating or heating effect is poor, which reduces the production efficiency.
[0004] In view of the above problems, the application provides a waste heat recovery device for drying link of paper mill. UTILITY MODEL CONTENTS
[0005] In view of the deficiencies in the prior art, the utility model aims to provide a waste heat recovery device for drying link of paper mill, which is equipped with an interception screen and an adsorption plate through the design of a steam-water separation mechanism, can efficiently filter the waste heat water vapor generated in the drying link of paper mill, and significantly reduce the water content in the steam. In the filtering process, the double cam continuously rotates to drive the ring plate one and the ring plate two to vibrate. This design can prevent water droplets from accumulating and blocking in the adsorption plate and the interception screen, ensure the smoothness of the filtering channel, and solve the problems in the above background technology.
[0006] In order to achieve the above purpose, the application specifically adopts the following technical scheme:
[0007] A waste heat recovery device for drying link of paper mill, comprising a recovery tank body and an air inlet pipe fixed on one side of the recovery tank body, a group of steam-water separation mechanisms are arranged on the top inside of the recovery tank body; the steam-water separation mechanism comprises a ring plate one arranged on the top inside of the recovery tank body, an interception screen is installed on the inner side of the ring plate one, a ring plate two is arranged above the ring plate one, an adsorption plate is installed on the inner side of the ring plate two, a center block is arranged between the ring plate one and the ring plate two, the center block is fixedly connected with the ring plate one and the ring plate two through four groups of side connecting rods respectively; a rotatable double cam is arranged between the two groups of center blocks, a group of first fixed ring plates are fixedly connected with a group of springs one respectively below the ring plate one and above the ring plate two.
[0008] Through the technical scheme, the interception wire mesh preliminarily filters the moisture in the steam. Large water droplets carried in the steam are intercepted by the interception wire mesh and gathered on the lower surface of the interception wire mesh during the rising process. The preliminary filtration is completed.
[0009] As a preferred implementation form, the first fixed ring plate is fixedly connected with the inner wall of the recovery tank body, both ends of the double cam are protruding structures, and a driving shaft is installed in the middle of the double cam.
[0010] Through the technical scheme, when the double cam rotates, the protruding parts of the double cam periodically push the two groups of center blocks, and the center blocks push the ring plate one and the ring plate two through the side connecting rods.
[0011] As a preferred implementation form, the lower end of the air inlet pipe is fixedly connected with a gas collecting cover, a support is fixedly installed below the recovery tank body, and one side of the air inlet pipe is fixedly connected with the support through a connecting rod.
[0012] Through the technical scheme, the steam with waste heat generated in the papermaking process rises into the gas collecting cover and then enters the recovery tank body through the air inlet pipe.
[0013] As a preferred implementation form, the adsorption plate is made of activated carbon material, a valve is fixedly installed above the recovery tank body, an air guide pipe is fixedly connected above the valve, and a water outlet pipe is fixedly connected below the recovery tank body.
[0014] Through the technical scheme, the adsorption plate can adsorb and filter out the fine moisture remaining after the steam is filtered once, and the dry steam after the filtering process can smoothly pass through the valve and enter the air guide pipe.
[0015] As a preferred implementation form, a group of vibration water filtering mechanisms are arranged below the inside of the recovery tank body, the vibration water filtering mechanism includes a second fixed ring plate fixed below the inside of the recovery tank body, a ring plate three is fixedly connected below the second fixed ring plate through a group of springs two, a water filtering plate is installed in the middle of the ring plate three, a plurality of through holes are formed in the surface of the water filtering plate, and each group of springs one and springs two are annularly and equidistantly arranged six.
[0016] Through the technical scheme, in the steam-water separation process, the intercepted and separated water droplets fall to the surface of the water filtering plate under the action of gravity. The water filtering plate is provided with a plurality of through holes, and these through holes filter the papermaking generated particulate impurities (such as impurities formed by paper scraps and water) contained in the water.
[0017] As a preferred implementation form, a single cam is arranged below the water filtering plate, one end of the single cam is a protruding structure, a driven shaft is installed in the middle of the single cam, a cleaning door is movably connected to the back lower part of the recovery tank body through a hinge, and the position of the cleaning door corresponds to the position of the water filtering plate.
[0018] Through the technical scheme, when the filter plate surface needs to be cleaned, the operator can easily open the cleaning door to clean the filter plate surface.
[0019] As a preferred embodiment, the recycling tank body is provided with a linkage mechanism on one side, the linkage mechanism comprises a motor fixing plate fixed on one side of the recycling tank body, a driving motor is fixedly installed on the inner side of the motor fixing plate, the output shaft of the driving motor is fixedly connected with a driving wheel, a driven wheel is arranged below the driving wheel, the driving wheel and the driven wheel are drivingly connected through a transmission belt, the driving wheel is fixedly connected with one end of a driving shaft, and the driven wheel is fixedly connected with one end of a driven shaft.
[0020] Through the technical scheme, when the driving motor drives the driving wheel to rotate, the driving wheel drives the driven wheel to rotate through the transmission belt.
[0021] As a preferred embodiment, the recycling tank body is provided with two groups of fixing blocks on one side, a sealing bearing is fixedly installed in the middle of the fixing block, and one end of the driving shaft and one end of the driven shaft are fixedly connected with the inner sides of the two groups of sealing bearings respectively.
[0022] Through the technical scheme, when the driving shaft and the driven shaft rotate, the inner sides of the sealing bearings can be driven to rotate respectively, so that the driving shaft and the driven shaft can rotate more stably.
[0023] After the above technical scheme is adopted, the utility model has the beneficial effects that:
[0024] 1. The steam-water separation mechanism is designed, the mechanism is provided with an intercepting screen and an adsorption plate, can efficiently filter the waste heat steam generated in the papermaking drying link, and significantly reduces the water content in the steam; in the filtering process, the double cam is continuously rotated, drives the ring plate one and the ring plate two to vibrate, this design can prevent water droplets from accumulating and blocking in the adsorption plate and the intercepting screen, ensures that the filtering channel remains unblocked, improves the filtering efficiency, through this way, the water content of the treated water vapor is greatly reduced, and the quality is significantly improved, so that the requirement of subsequent links for waste heat utilization can be better met.
[0025] 2. The linkage mechanism and the vibration water filtering mechanism are designed, in the steam-water separation process, after the steam and water are initially separated, the water drops on the filter plate under the action of gravity, then the various particle impurities generated in the papermaking link can be effectively filtered out through the through hole, and the single cam can be driven to rotate synchronously while the double cam is driven to rotate by the linkage mechanism; the filter plate can be vibrated in the rotating process of the single cam, and the vibration effect can prevent the accumulation and blockage of impurities in the through hole. BRIEF DESCRIPTION OF DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0027] Figure 1 It is a whole structure schematic view of the present application of a waste heat recovery device in a drying link of a paper mill.
[0028] Figure 2 It is a structure schematic view of another perspective of the present application of a waste heat recovery device in a drying link of a paper mill.
[0029] Figure 3 It is a structure schematic view of a side view section of the present application of a waste heat recovery device in a drying link of a paper mill.
[0030] Figure 4 It is a structure schematic view of a steam-water separation mechanism in the present application of a waste heat recovery device in a drying link of a paper mill.
[0031] Figure 5 It is a structure schematic view of a vibration water filtering mechanism in the present application of a waste heat recovery device in a drying link of a paper mill.
[0032] Figure 6 It is an enlarged schematic view of A part of the present application. Figure 1
[0033] In the figure, 1, recovery tank body; 2, gas collecting cover; 3, air inlet pipe; 4, support; 5, air guide pipe; 6, water outlet pipe; 7, steam-water separation mechanism; 71, ring plate one; 72, ring plate two; 73, first fixed ring plate; 74, spring one; 75, adsorption plate; 76, intercepting wire mesh; 77, double cam; 78, driving shaft; 79, center block; 710, side connecting rod; 8, vibration water filtering mechanism; 81, second fixed ring plate; 82, ring plate three; 83, single cam; 84, spring two; 85, water filtering plate; 86, driven shaft; 9, linkage mechanism; 91, motor fixing plate; 92, driving motor; 93, driving wheel; 94, driven wheel; 95, transmission belt; 96, fixed block; 97, sealing bearing; 10, valve. DETAILED DESCRIPTION
[0034] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0035] Please refer to Figures 1 to 6 The waste heat recovery device for the drying link of a paper mill comprises a recovery tank body 1, an air inlet pipe 3 fixed to one side of the recovery tank body 1, a group of steam-water separation mechanisms 7 arranged at the upper portion of the inside of the recovery tank body 1, a ring plate one 71 arranged at the upper portion of the inside of the recovery tank body 1, an intercepting wire mesh 76 mounted to the inner side of the ring plate one 71, a ring plate two 72 arranged above the ring plate one 71, an adsorption plate 75 mounted to the inner side of the ring plate two 72, a center block 79 arranged between the ring plate one 71 and the ring plate two 72, four groups of side connecting rods 710 respectively fixedly connecting the ring plate one 71 and the ring plate two 72 through the center block 79, a rotatable double cam 77 arranged between the two groups of center blocks 79, and a group of first fixed ring plates 73 fixedly connected to the ring plate one 71 and the ring plate two 72 through a group of springs one 74.
[0036] The intercepting wire mesh 76 performs preliminary filtration on the water in the steam. The relatively large water droplets carried in the steam are intercepted by the intercepting wire mesh 76 and gathered on the lower surface thereof during the rising process.
[0037] The first fixed ring plate 73 is fixedly connected to the inner wall of the recovery tank body 1, the double cam 77 has a convex structure at both ends, and a driving shaft 78 is mounted to the middle of the double cam 77.
[0038] When the double cam 77 rotates, the convex portions thereof periodically push the two groups of center blocks 79, and the center blocks 79 push the ring plate one 71 and the ring plate two 72 through the side connecting rods 710.
[0039] The air inlet pipe 3 is fixedly connected to a gas collecting cover 2 at the lower end, a support 4 is fixedly mounted below the recovery tank body 1, and the air inlet pipe 3 is fixedly connected to the support 4 through a connecting rod at one side.
[0040] The steam with waste heat in the papermaking link rises into the gas collecting cover 2 and then enters the recovery tank body 1 through the air inlet pipe 3.
[0041] The adsorption plate 75 is made of activated carbon material, a valve 10 is fixedly mounted above the recovery tank body 1, a gas guide pipe 5 is fixedly connected to the valve 10, and a water outlet pipe 6 is fixedly connected to the recovery tank body 1.
[0042] The adsorption plate 75 can adsorb and filter out the fine moisture remaining after the steam is filtered once. The dry steam after the filtering process can smoothly pass through the valve 10 into the air duct 5.
[0043] A set of vibration water filtering mechanisms 8 are arranged below the inside of the recycling tank body 1. The vibration water filtering mechanisms 8 include a second fixed ring plate 81 fixed below the inside of the recycling tank body 1. A ring plate three 82 is fixedly connected below the second fixed ring plate 81 through a set of spring two 84. A water filtering plate 85 is installed in the middle of the ring plate three 82. A plurality of through holes are formed on the surface of the water filtering plate 85. Each set of spring one 74 and each set of spring two 84 are annularly and equidistantly arranged with six.
[0044] During the steam-water separation process, the intercepted and separated water droplets will drop downward to the surface of the water filtering plate 85 under the action of gravity. The water filtering plate 85 is provided with a plurality of through holes which can filter the papermaking generated particulate impurities (such as impurities formed by paper scraps and water) contained in the water.
[0045] A single cam 83 is arranged below the water filtering plate 85. One end of the single cam 83 is a convex structure. A driven shaft 86 is installed in the middle of the single cam 83. A cleaning door is hingedly connected to the back lower side of the recycling tank body 1. The position of the cleaning door corresponds to the position of the water filtering plate 85.
[0046] In order to facilitate daily maintenance, when it is necessary to clean the impurities remaining on the surface of the water filtering plate 85, the cleaning door can be easily opened by the operator to clean the impurities on the surface of the water filtering plate 85.
[0047] A linkage mechanism 9 is arranged on one side of the recycling tank body 1. The linkage mechanism 9 includes a motor fixed plate 91 fixed on one side of the recycling tank body 1. A drive motor 92 is fixedly installed on the inner side of the motor fixed plate 91. The output shaft of the drive motor 92 is fixedly connected with a driving wheel 93. A driven wheel 94 is arranged below the driving wheel 93. The driving wheel 93 and the driven wheel 94 are drivingly connected through a transmission belt 95. One end of the driving wheel 93 is fixedly connected with the driving shaft 78. One end of the driven wheel 94 is fixedly connected with the driven shaft 86.
[0048] When the driving wheel 93 is driven to rotate by the drive motor 92, the driving wheel 93 will drive the driven wheel 94 to rotate through the transmission belt 95.
[0049] Two sets of fixed blocks 96 are installed on one side of the recycling tank body 1. A sealing bearing 97 is fixedly installed in the middle of each fixed block 96. One end of the driving shaft 78 and one end of the driven shaft 86 are respectively fixedly connected with the inner sides of the two sets of sealing bearings 97.
[0050] When the driving shaft 78 and the driven shaft 86 rotate, they can respectively drive the inner sides of the sealing bearings 97 to rotate, so that the driving shaft 78 and the driven shaft 86 can rotate more stably.
[0051] In specific use, the working principle of the utility model is as follows:
[0052] In use, the water vapor with residual heat in the papermaking process rises into the gas collecting hood 2, and then enters the recovery tank body 1 through the air inlet pipe 3. After entering the recovery tank body 1, the water vapor starts to rise. In this process, the interception wire mesh 76 will be encountered first, which performs preliminary filtration on the water in the steam. The larger water droplets carried in the steam will be intercepted by the interception wire mesh 76 and gathered on its lower surface during the rising process. The steam that has completed the preliminary filtration will continue to rise, and at this time, the adsorption plate 75 can further adsorb and filter out the remaining fine water in the steam, achieving secondary filtration. The dry steam after the two filtration processes will smoothly pass through the valve 10 into the air guide pipe 5. The air guide pipe 5 serves as a transmission channel and can transmit these treated steam to other residual heat utilization equipment, thereby completing the effective utilization of residual heat. In the steam-water separation process, the driving motor 92 drives the driving wheel 93 to rotate, and the driving wheel 93 drives the double cam 77 to rotate synchronously through the driving shaft 78. When the double cam 77 rotates, its protruding part will periodically push the two sets of center blocks 79, and the center blocks 79 will push the ring plate one 71 and the ring plate two 72 through the side connecting rod 710. In this process, the ring plate one 71 and the ring plate two 72 will generate pressure on the spring one 74, which will be compressed accordingly under the support of the first fixed ring plate 73. When the protruding part of the double cam 77 gradually rotates away from the center block 79, the spring one 74 will quickly rebound, taking the ring plate one 71 and the ring plate two 72 with it. Through this periodic pushing and rebounding action, the interception wire mesh 76 and the adsorption plate 75 will continue to vibrate, and in this dynamic state, water droplets are difficult to gather and block in the mesh of the interception wire mesh 76 and the adsorption plate 75, and they will quickly drip, improving the filtration efficiency and ensuring the smoothness of steam-water separation.
[0053] In the steam-water separation process, the intercepted and separated water droplets will fall downward to the surface of the water filter plate 85 under the action of gravity. The water filter plate 85 is provided with a plurality of groups of through holes, which can filter the papermaking generated particulate impurities (such as impurities formed by paper scraps adhering to water) contained in the water. When the water droplets flow through the water filter plate 85, the through holes will intercept these impurities, and the filtered water will flow downward along the through holes and finally be discharged through the water outlet pipe 6. In order to prevent the impurities from being blocked in the through holes of the water filter plate 85, when the driving motor 92 drives the driving wheel 93 to rotate, the driving wheel 93 drives the driven wheel 94 to rotate through the transmission belt 95, and the driven wheel 94 drives the single cam 83 to rotate through the driven shaft 86. When the single cam 83 rotates, the protruding part thereof pushes the water filter plate 85, and after the water filter plate 85 is pushed, the pressure is transmitted to the spring two 84 through the ring plate three 82. At this time, the spring two 84 is compressed under the support of the second fixed ring plate 81. When the protruding part of the single cam 83 rotates away, the spring two 84 rebounds to drive the water filter plate 85 to rebound. Thus repeatedly, the water filter plate 85 will produce continuous vibration to shake out the impurities from the through holes, avoid the impurities from blocking the through holes, and ensure that the filtering effect is in the best state. In order to facilitate daily maintenance, when it is necessary to clean the impurities remaining on the surface of the water filter plate 85, the operator can easily open the cleaning door to clean the impurities on the surface of the water filter plate 85.
[0054] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A waste heat recovery device for a drying section of a paper mill, comprising a recovery tank (1) and an air inlet pipe (3) fixed to one side of the recovery tank (1), characterized in that: The recovery tank body (1) is internally provided with a group of steam-water separation mechanisms (7); The steam-water separation mechanism (7) comprises a ring plate one (71) arranged internally and upwardly of the recovery tank body (1), the inner side of the ring plate one (71) is provided with an intercepting screen (76), the upper side of the ring plate one (71) is provided with a ring plate two (72), the inner side of the ring plate two (72) is provided with an adsorption plate (75), the middle of the ring plate one (71) and the ring plate two (72) is provided with a center block (79), the center block (79) is fixedly connected with the ring plate one (71) and the ring plate two (72) through four groups of side connecting rods (710) respectively; Two groups of center blocks (79) are provided between the ring plate one (71) and the ring plate two (72), and a rotatable double cam (77) is arranged between the ring plate one (71) and the ring plate two (72), the lower side of the ring plate one (71) and the upper side of the ring plate two (72) are fixedly connected with a group of first fixed ring plates (73) through a group of spring ones (74) respectively.
2. A device for recovering waste heat from a drying section of a paper mill according to claim 1, characterized in that: The first fixed ring plate (73) is fixedly connected with the inner wall of the recovery tank body (1), the double cam (77) is provided with a convex structure at both ends, and a driving shaft (78) is arranged in the middle of the double cam (77).
3. A device for recovering waste heat from a drying section of a paper mill according to claim 2, characterized in that: The lower end of the air inlet pipe (3) is fixedly connected with a gas collecting cover (2), the lower side of the recovery tank body (1) is fixedly provided with a support (4), and one side of the air inlet pipe (3) is fixedly connected with the support (4) through a connecting rod.
4. A device for recovering waste heat from a drying section of a paper mill according to claim 3, characterized in that: The adsorption plate (75) is made of activated carbon material, the upper side of the recovery tank body (1) is fixedly provided with a valve (10), the upper side of the valve (10) is fixedly connected with an air guide pipe (5), and the lower side of the recovery tank body (1) is fixedly connected with a water outlet pipe (6).
5. A device for recovering waste heat from a drying section of a paper mill according to claim 1, characterized in that: The lower side of the recovery tank body (1) is internally provided with a group of vibration water filtering mechanisms (8), the vibration water filtering mechanism (8) comprises a second fixed ring plate (81) fixedly arranged at the lower side of the recovery tank body (1), the lower side of the second fixed ring plate (81) is fixedly connected with a ring plate three (82) through a group of spring twos (84), the middle of the ring plate three (82) is provided with a water filtering plate (85), a plurality of through holes are formed in the surface of the water filtering plate (85), and each group of spring ones (74) and each group of spring twos (84) are annularly and equidistantly provided with six.
6. A device for recovering waste heat from a drying section of a paper mill according to claim 5, characterized in that: The lower side of the water filtering plate (85) is provided with a single cam (83), one end of the single cam (83) is provided with a convex structure, a driven shaft (86) is arranged in the middle of the single cam (83), the lower side of the back of the recovery tank body (1) is hingedly connected with a cleaning door, and the position of the cleaning door corresponds to the position of the water filtering plate (85).
7. A device for recovering waste heat from a drying section of a paper mill according to claim 6, characterized in that: The recycling tank body (1) one side is equipped with linkage mechanism (9), the linkage mechanism (9) includes motor fixed plate (91) fixed in recycling tank body (1) one side, the inside fixed mounting of motor fixed plate (91) has drive motor (92), the output shaft of drive motor (92) is fixedly connected with driving wheel (93), the driving wheel (93) below is equipped with driven wheel (94), the driving wheel (93) is connected with driven wheel (94) through transmission belt (95) and is driven, the driving wheel (93) is fixedly connected with drive shaft (78) one end, the driven wheel (94) is fixedly connected with driven shaft (86) one end.
8. A device for recovering waste heat from a drying section of a paper mill according to claim 7, characterized in that: The recycling tank body (1) one side is equipped with two groups of fixed blocks (96), the fixed block (96) middle fixed mounting has sealing bearing (97), the one end of drive shaft (78) and driven shaft (86) one end is fixedly connected with two groups of sealing bearing (97) inside respectively.