Hot grinding steam recovery device and method for artificial density board

Abstract

The invention relates to an artificial density board hot grinding steam recovery device and method, and relates to the technical field of steam recovery. According to the steam recovery device, the following problems existing in the steam recovery process in the prior art can be solved: firstly, by arranging the reciprocating screw rod and the adjusting block and adjusting the upward moving distance of the adjusting block, the steam suction amount is controlled, the steam recovery amount is effectively controlled, the stability of the hot grinding effect is ensured, and the working efficiency of equipment is improved; and secondly, by arranging a cooling cavity, a control cavity and a flowing cavity, the cooling plates in the adjusting block are cooled through flowing of water in all the cavities, and it is guaranteed that the cooling plates can always condense steam between the two cooling plates. And finally, a feeding pipe is arranged, a filter plate is arranged in the feeding pipe, impurities in the steam are filtered through the filter plate, the purity of the steam is improved, pollution and blockage to follow-up equipment are reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of steam recovery, and in particular to a device and method for recovering steam from thermal grinding of artificial density boards. Background Art

[0002] Steam recovery from thermal grinding of artificial density boards refers to the recovery and reuse of steam generated during the thermal grinding process through specific equipment and processes during the processing of artificial boards.

[0003] In the production of wood-based panels such as medium-density fiberboard, wood chips are ground in a refiner to form fibers. To soften the chips and make them easier to grind, they are usually heated with steam.

[0004] During the hot grinding process, after the wood chips are ground into fibers, the fibers will contain a large amount of steam. If these steam are not separated and recovered in time, they will have an adverse effect on the subsequent processing and affect the drying and forming of the fibers.

[0005] For example, a Chinese patent with announcement number CN218723262U discloses a steam recovery device for pulping heat energy, which belongs to the field of steam recovery technology. The refrigeration plate can directly collide with the steam for cooling, and the staggered distribution of guide holes can increase the collision effect between the steam and the refrigeration plate, thereby greatly improving the condensation efficiency of the steam, thereby improving the steam recovery efficiency, and the thermal energy of the steam can be utilized by the thermal energy power generation module and the battery, thereby providing electrical energy for the refrigeration plate, greatly reducing the steam recovery cost.

[0006] However, the above device still has some shortcomings in actual use: 1. The above-mentioned device can directly collide and cool the steam through the refrigeration plate set, and the collision effect between the steam and the refrigeration plate can be increased through the staggered distribution of the guide holes, thereby greatly improving the condensation efficiency of the steam and thus improving the steam recovery efficiency. However, the above-mentioned device cannot adjust the volume of the recovered steam, which will result in more or less steam recovery. The fluctuation of the steam recovery amount will cause the fluctuation of the pulp concentration and temperature during the refining process, affecting the consistency of the refining effect.

[0007] 2. In the production process of artificial boards, the hot grinding process is a key link, which is mainly used to grind wood into fibers. However, this process will produce a lot of debris and dust, which will enter the recovery device with the steam. Since the device lacks a debris filtering structure, it is easy to cause the guide pipe or guide hole to be blocked, thereby affecting the steam flow and reducing the condensation efficiency.

[0008] Therefore, based on the above viewpoints, it is very important to improve and perfect the steam recovery device of refining heat energy. This can not only adjust the steam recovery amount, improve the recovery efficiency, ensure the stability of the refining effect, but also effectively filter the debris in the steam, thereby improving the condensation efficiency. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a device and method for recovering steam from thermal grinding of artificial density board.

[0010] On the one hand, a steam recovery device for hot grinding of artificial density board includes a recovery tank, a collecting pipe connected to the recovery tank is arranged at the bottom of the recovery tank, a reciprocating screw is rotatably arranged inside the recovery tank, an adjusting block is threadedly arranged on the reciprocating screw, a cooling chamber is opened inside the adjusting block, and cooling plates with adjusting blocks passing through the bottom are equidistantly arranged inside the cooling chamber.

[0011] The recovery tank is provided with a condensation component for driving the steam inside the regulating block to condense, and the condensation component includes a partition. The upper end of the recovery tank is provided with a control chamber and a flow chamber through a T-shaped partition.

[0012] Preferably, the recovery tank is provided with a linkage part for driving the water flow inside the regulating block to flow inside the control chamber and the flow chamber, the linkage part includes a control pipe, the control pipe is provided at one end in the length direction of the regulating block, and the control pipe is respectively connected with the cooling chamber and the control chamber, the control pipe passes through a partition and extends into the control chamber, a push plate is provided at one end of the control pipe in the control chamber, and the other end of the regulating block is provided with a connecting pipe respectively connected with the flow chamber and the cooling chamber, and the connecting pipe is a telescopic structure.

[0013] Preferably, the cooling plate is reciprocatingly bent inside the regulating block, and the bending parts are inclined to the inner wall of the cooling chamber.

[0014] Preferably, the portion of the bottom of the cooling plate extending out of the adjusting block is bent toward a side away from the reciprocating screw.

[0015] Preferably, a perfect part for condensing and recovering excess steam is also provided inside the recovery tank, and the perfect part includes a rotating plate, which is symmetrically rotated on the top of the adjusting block through a torsion spring, and a delivery pipe passing through the adjusting block is symmetrically provided on the adjusting block, and the upper end of the delivery pipe is flush with the top of the adjusting block.

[0016] Preferably, a filtering mechanism for removing impurities from the recovered steam is also provided inside the recovery tank, and the filtering mechanism includes a feed hopper, which is arranged at the bottom of the adjusting block and sleeved on the outside of the reciprocating screw, and a feed pipe connected to the feed hopper is provided at the bottom, and the collecting pipe is connected to the bottom of the feed pipe, and filter plates are provided inside the feed pipe above the feed pipe and at the bottom of the feed pipe.

[0017] Preferably, a feed inlet is provided on one side of two opposite cooling plates outside the regulating block, and the feed inlet is located above a bending portion of the cooling plates outside the regulating block.

[0018] Preferably, a baffle plate is symmetrically rotated by a torsion spring at the bottom of the recovery tank, and through holes corresponding to the conveying pipes are opened on the two filter plates, and flip plates are rotatably arranged in the through holes.

[0019] On the other hand, a method for recovering steam from a thermal mill of an artificial density board is as follows: S1. Steam collection: The steam generated during the hot grinding operation will enter the recovery tank through the collection pipe; S2. Steam filtration: After the steam enters the feed pipe, the impurities in the steam will be filtered by the filter plate; S3, volume control: the amount of steam suction is controlled by moving the regulating block up and down inside the recovery tank; S4, steam condensation: Steam enters the regulating block and condenses into water when passing through the cooling plate with lower temperature, and then falls to the bottom of the recovery tank for collection; S5, water cooling: keep the water inside the cooling chamber at a low temperature, and ensure that the cooling plate remains at a low temperature; S6. Steam recovery: The condensed water can flow out from the bottom of the recovery tank and return to the thermal mill for reuse.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present invention controls the amount of steam suction by setting a reciprocating screw and an adjusting block, and by adjusting the distance the adjusting block moves upward, effectively preventing excessive or insufficient steam recovery, ensuring a stable thermal grinding effect, and improving the working efficiency of the equipment. The one-way valve is designed to prevent steam backflow.

[0021] 2. The present invention sets a cooling chamber, a control chamber and a flow chamber, and utilizes the flow of water inside each chamber to cool the cooling plate inside the regulating block, thereby ensuring that the cooling plate can always condense the steam between the two cooling plates.

[0022] 3. The present invention provides a feed pipe and a filter plate in the feed pipe to filter impurities in the steam through the filter plate, thereby improving the purity of the steam, reducing pollution and blockage to subsequent equipment, and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure inside the recovery tank of the present invention.

[0026] Figure 3 It is a schematic diagram of a motion state of the water body of the present invention.

[0027] Figure 4 It is a structural schematic diagram of the cooling plate of the present invention.

[0028] Figure 5 It is a schematic diagram of the structure inside the feed pipe of the present invention.

[0029] Figure 6 It is another schematic diagram of the motion state of the water body of the present invention.

[0030] Figure 7 It is a structural schematic diagram of the feed pipe of the present invention.

[0031] Figure 8 The present invention Figure 7 Schematic diagram of the structure at A in the middle.

[0032] In the figure, 1. recovery tank; 10. collecting pipe; 11. reciprocating screw; 12. adjusting block; 13. cooling chamber; 14. cooling plate; 2. condensing part; 20. partition; 21. control chamber; 22. flow chamber; 3. linkage; 30. control pipe; 31. push plate; 32. connecting pipe; 33. flow hole; 4. perfecting part; 40. rotating plate; 41. conveying pipe; 5. filtering mechanism; 50. feed hopper; 51. feed pipe; 52. filter plate; 6. feed port; 70. baffle plate; 71. flip plate; 8. Z-shaped groove; 9. guide hole. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-Figure 8 Embodiments of the present invention are described in detail.

[0034] The embodiment of the present application discloses a steam recovery device and method for hot grinding of artificial density board, which illustrates that the present invention is mainly used in the process of steam recovery, and can avoid the problem of being unable to adjust the steam recovery amount and affecting the stability of the grinding effect in terms of technical effect; further, the present invention can also solve the problem of debris in the steam affecting the condensation efficiency during steam recovery.

[0035] Embodiment 1: Reference Figure 1 , Figure 2 and Figure 3 As shown, it includes a recovery tank 1, a collecting pipe 10 connected to the recovery tank 1 is arranged at the bottom, and a one-way valve is arranged inside the collection pipe 10. The steam generated during the hot grinding operation will enter the recovery tank 1 through the collection pipe 10. Due to the setting of the one-way valve, the steam backflow is prevented. A reciprocating screw 11 is rotatably arranged inside the recovery tank 1, and an adjusting block 12 is threadedly arranged on the reciprocating screw 11. The adjusting block 12 is driven by the reciprocating screw 11 to move up and down inside the recovery tank 1. When the adjusting block 12 moves upward, the volume inside the recovery tank 1 and below the adjusting block 12 expands accordingly, thereby reducing the internal pressure. Since the pressure in the collection pipe 10 is higher than that in the recovery tank 1, the steam is sucked into the recovery tank 1. By accurately adjusting the distance that the adjusting block 12 moves upward, the amount of steam sucked can be effectively controlled to ensure that the amount of steam recovered during the hot grinding process is moderate and avoid affecting the hot grinding effect. Since a one-way valve is arranged inside the collection pipe 10, when the adjusting block 12 moves downward, the steam will not return to the collection pipe 10.

[0036] A cooling chamber 13 is provided inside the regulating block 12. The steam sucked into the recovery tank 1 will be condensed through the cooling chamber 13. The condensed water will be collected separately and can be returned to the hot mill and used as a raw material for steam production, thereby realizing the recycling of excess steam.

[0037] Cooling plates 14 with adjusting blocks 12 passing through the bottom are equidistantly arranged inside the cooling chamber 13. Two groups of cooling plates 14 are symmetrically arranged inside the adjusting block 12. During the descent of the adjusting block 12, the air below the adjusting block 12 will be compressed. At this time, the pressure below the adjusting block 12 in the recovery tank 1 is greater than the pressure inside the adjusting block 12. The steam will be sucked between the two cooling plates 14 in the adjusting block 12. Inside the adjusting block 12, when the steam passes through the cooling plates 14 with lower temperature, it will condense into water. Then the condensed water will slide through the gap between the two cooling plates 14 and fall to the bottom of the recovery tank 1 under the adjusting block 12 for collection.

[0038] Reference Figure 3As shown, that is, a structural schematic diagram of the shape of the cooling plate 14; specifically, the cooling plate 14 is reciprocatingly bent inside the regulating block 12, and the bending parts are inclined to the inner wall of the cooling chamber 13. The reason for driving the cooling plate 14 to be reciprocatingly bent inside the regulating block 12 is to increase the contact area between the steam and the cooling plate 14 inside the regulating block 12, so as to drive the steam to exchange heat with the cooling plate 14 to a greater extent, thereby improving the heat exchange efficiency.

[0039] The inclined cooling plate 14 can facilitate the water vapor to slide down along the cooling plate 14 after condensation, and will not accumulate on the cooling plate 14.

[0040] The bottom of the cooling plate 14 extends out of the adjusting block 12 and is bent toward a side away from the reciprocating screw 11 .

[0041] The moisture condensed inside the regulating block 12 will flow out through the gaps between the cooling plates 14 and fall into the recovery tank 1 for collection.

[0042] Reference Figure 3 and Figure 4 As shown, it is a schematic diagram of the structure that drives the cooling plate 14 to maintain a low temperature state; specifically, the recovery tank 1 is provided with a condensation component 2 that drives the steam inside the regulating block 12 to condense, and the condensation component 2 includes a partition 20, and a control chamber 21 and a flow chamber 22 are provided at the upper end of the recovery chamber through the T-shaped partition 20.

[0043] Water is provided inside the control chamber 21 and the flow chamber 22, and water is also provided inside the cooling chamber 13. By circulating the water inside the cooling chamber 13 with the water in the control chamber 21 and the flow chamber 22, it is ensured that the water in the cooling chamber 13 maintains a low temperature state, thereby maintaining the low temperature of the cooling plate 14, so that the steam between the two cooling plates 14 can always be effectively condensed.

[0044] Reference Figure 3 As shown, it is a schematic diagram of the structure for controlling the flow of water; specifically, a linkage 3 is provided inside the recovery tank 1 to drive the water flow inside the regulating block 12 to flow inside the control chamber 21 and the flow chamber 22, and the linkage 3 includes a control pipe 30, the control pipe 30 is provided at one end in the length direction of the regulating block 12, and the control pipe 30 is connected with the cooling chamber 13 and the control chamber 21 respectively, the control pipe 30 partition 20 extends into the control chamber 21, and a push plate 31 is provided at one end of the control pipe 30 in the control chamber 21, and a flow hole 33 connected with the inside of the control chamber 21 is opened below the push plate 31 of the control pipe 30.

[0045] The other end of the regulating block 12 is provided with a connecting pipe 32 which is in communication with the flow chamber 22 and the cooling chamber 13 respectively, wherein the connecting pipe 32 is a telescopic structure and can be telescoped when the regulating block 32 is raised or lowered.

[0046] When the regulating block 12 moves downward, the push plate 31 drives the water in the control chamber 21 to flow through the control pipe 30 into the cooling chamber 13. At this time, the water with a lower temperature in the control chamber 21 mixes with the water in the cooling chamber 13, further reducing the water temperature of the cooling chamber 13. As the amount of water in the cooling chamber 13 increases, excess water flows into the flow chamber 22 through the connecting pipe 32 and mixes with the water in the flow chamber 22, driving the temperature of the water mixed with it to decrease.

[0047] On the contrary, when the adjusting block 12 moves upward, the push plate 31 acts as a piston to suck the water in the cooling chamber 13 into the control chamber 21, so that the water inside the control chamber 21 can be mixed and exchanged with the water inside the control chamber 21, and the push plate 31 is used to mix and exchange the water inside the cooling chamber 13 with the water inside the control chamber 21 and the flow chamber 22, so that the water inside the cooling chamber 13 can be cooled, thereby improving the effect of the cooling plate 14 on condensing steam.

[0048] Reference Figure 3 , Figure 4 and Figure 5 As shown, it is a schematic diagram of the structure for collecting excess steam; specifically, the recovery tank 1 is also provided with a complete component 4 for condensing and recovering excess steam. When the recovered steam is too much, the condensed amount of steam entering between the two cooling plates 14 is less than the incoming amount of steam, and at this time the steam cannot be completely condensed for recovery.

[0049] The improvement part 4 includes a rotating plate 40, which is symmetrically rotated by a torsion spring and arranged on the top of the adjusting block 12. Excess steam will move upward through the gap between the two cooling plates 14. When it moves to the uppermost end, the rotating plate 40 will flip under the action of the steam, and the excess steam between the cooling plates 14 will enter the space between the adjusting block 12 and the partition 20. The adjusting block 12 is symmetrically provided with a delivery pipe 41 that passes through the adjusting block 12, and the upper end of the delivery pipe 41 is flush with the top of the adjusting block 12.

[0050] Due to the characteristics of steam, it will move upward when entering the space between the regulating block 12 and the partition 20, and then after contacting the partition 20 above, since the other side of the partition 20 is in contact with the water in the control chamber 21 and the flow chamber 22, the partition 20 will be cooled to a certain extent. The excess steam will gradually condense after contacting the partition 20, and the condensed water will enter the delivery pipe 41 and flow into the bottom of the recovery tank 1 through the delivery pipe 41 for collection, thereby realizing the function of recovering the excess steam and improving the steam recovery effect.

[0051] Reference Figure 3 , Figure 5 and Figure 7As shown, it is a schematic diagram of the structure for filtering the recovered steam; specifically, a filtering mechanism 5 for removing impurities in the recovered steam is also provided inside the recovery tank 1, and the filtering mechanism 5 includes a feed hopper 50, and the feed hopper 50 is arranged at the bottom of the adjusting block 12 and is sleeved on the outside of the reciprocating screw 11, and a feed pipe 51 connected to the feed hopper 50 is arranged at the bottom, and the collecting pipe 10 is connected to the bottom of the feed pipe 51, and filter plates 52 are arranged above the feed pipe 51 and at the bottom of the feed pipe 51, and the collecting pipe 10 is located between the two filter plates 52.

[0052] The steam entering through the collecting pipe 10 will enter the feed pipe 51 , and then enter between the two cooling plates 14 inside the regulating block 12 through the feed hopper 50 .

[0053] After the steam enters the feed pipe 51, the steam will gradually move upwards. During the movement, impurities in the steam will be isolated by the filter plate 52, thereby achieving the effect of filtering the steam.

[0054] It should be noted that the bottom of the feed pipe 51 is a hard pipe to facilitate the installation of the filter plate 52 and fixation of the bottom of the feed pipe 51, and the upper end of the feed pipe 51 is a telescopic structure to adapt to the feed hopper 50 connected above the feed pipe 51 to follow the movement of the adjustment block 12.

[0055] It should be noted that the feed pipe 51 is also sleeved on the outside of the delivery pipe 41, so that the water condensed inside the delivery pipe 41 can flow into the bottom of the recovery tank 1 through the filter plate 52 at the bottom of the feed pipe 51. In addition, since the water in the delivery pipe 41 is condensed, the temperature of the condensed water in the delivery pipe 41 is relatively low. When the steam in the feed pipe 51 rises, part of the steam contacts the delivery pipe 41 and condenses on the outer wall, thereby reducing the pressure of subsequent steam condensation.

[0056] Reference Figure 5 , Figure 7 and Figure 8 As shown, it is a structural schematic diagram of the moisture inside the cooling chamber 13 flowing into the bottom of the recovery tank 1; specifically, two opposite cooling plates 14 are located on one side outside the regulating block 12 and are provided with a feed port 6, and the feed port 6 is located above the bending part of the cooling plate 14 outside the regulating block 12.

[0057] The purpose of such a configuration is that after the steam enters between the two cooling plates 14 from the feed hopper 50 through the feed port 6, the steam will gradually rise inside the cooling plate 14. Since the bottom of the cooling plate 14 is in a bent state, the steam will move upward, and it is difficult for the steam to enter the recovery tank 1 through the bend of the cooling plate 14, thereby preventing insufficient steam recovery. In addition, the condensed water will also flow down from the cooling plate 14 at the same time. Due to the fluidity of the water and the action of gravity, it will directly fall to the bend of the cooling plate 14.

[0058] Reference Figure 5 As shown, it is a schematic diagram of the structure for collecting the condensed water; specifically, a baffle plate 70 is symmetrically rotated at the bottom of the recovery tank 1 through a torsion spring, and perforations corresponding to the conveying pipe 41 are opened on the two filter plates 52, and a flip plate 71 is rotatably arranged in the perforations.

[0059] When the moisture at the bottom of the recovery tank 1 accumulates to a certain amount, the regulating block 12 is driven to descend. During the descent, the delivery pipe 41 will push the flip plate 71 to rotate and pass through the filter plate 52 until the barrier plate 70 is gradually pushed to rotate. The moisture can then flow out from the bottom of the recovery tank 1 and then return to the thermal mill through the external water pipe for reuse.

[0060] Embodiment 2: On the basis of Example 1, in order to further improve the condensation effect and accelerate the cooling rate of the water body, a lifting member is also proposed, which is beneficial to enhance the flow rate of the water body, increase the circulation rate of the water body, cool the water body faster, and have a better condensation effect on steam.

[0061] Reference Figure 6 As shown, it is a schematic diagram of the structure for improving the steam condensation effect; specifically, the lifting member includes a Z-shaped groove 8, a Z-shaped groove 8 is opened on the partition 20 between the control chamber 21 and the flow chamber 22, the upper end of the Z-shaped groove 8 is connected to the control chamber 21, the lower end of the Z-shaped groove 8 is connected to the flow chamber 22, and a guide hole 9 is opened on the push plate 31.

[0062] It should be noted that a one-way valve is provided in the guide hole 9 and at the connecting point of the flow hole 33, so that the water flow in the control pipe 30 can enter the control chamber 21 through the one-way valve, and then the water inside the control chamber 21 below the push plate 31 can enter the space above the push plate 31 through the guide hole 9.

[0063] When the push plate 31 moves upward, it can push the moisture in the control chamber 21 to flow into the flow chamber 22 through the Z-shaped groove 8. The space below the push plate 31 inside the control chamber 21 becomes larger, resulting in a decrease in pressure. The moisture in the cooling chamber 13 can be sucked into the control chamber 21, and the moisture enters the area below the push plate 31 through the flow hole 33. At this time, the moisture in the cooling chamber 13 is reduced, while the moisture in the flow chamber 22 is replenished, thereby realizing moisture circulation.

[0064] On the contrary, when the push plate 31 moves downward, the push plate 31 squeezes the moisture at the bottom of the control chamber 21, and the moisture enters the space above the push plate 31 through the guide hole 9 to replenish the moisture in the space above the push plate 31. When the push plate 31 moves upward again, the moisture is pushed into the flow chamber 22 again, and the cycle is repeated in this way, thereby improving the fluidity of the moisture in the control chamber 21, the flow chamber 22 and the cooling chamber 13, increasing the cooling speed of the water body, and improving the cooling effect of the cooling.

[0065] During operation: In the first step, the steam generated during the hot grinding process is introduced into the recovery tank 1 through the collecting pipe 10.

[0066] In the second step, after the steam enters the feed pipe 51, it gradually rises, during which the impurities are effectively isolated by the filter plate 52 to achieve steam filtration.

[0067] Step 3: The reciprocating screw 11 drives the regulating block 12 to move up and down inside the recovery tank 1 to control the amount of steam suction to prevent excessive or insufficient steam recovery, which would affect the effect of the hot grinding.

[0068] Step 4: During the descent of the regulating block 12, the steam will enter between the two cooling plates 14 in the regulating block 12. Inside the regulating block 12, the steam will condense into water when passing through the cooling plate 14 with a lower temperature. The condensed water will then slide down through the cooling plate 14 and fall from the bottom of the regulating block 12 to the bottom of the recovery tank 1 for collection.

[0069] Step 5: Water is provided inside the control chamber 21 and the flow chamber 22, and water is also provided inside the cooling chamber 13 inside the regulating block 12. By driving the water inside the cooling chamber 13 to flow and exchange with the water in the control chamber 21 and the flow chamber 22, the water inside the cooling chamber 13 is driven to maintain a low temperature state, thereby ensuring that the cooling plate 14 maintains a low temperature state and ensuring that the cooling plate 14 can always condense the steam between the two cooling plates 14.

[0070] Step 6: When the water at the bottom of the recovery tank 1 accumulates to a certain amount, the regulating block 12 is driven to descend. During the descent, the delivery pipe 41 will pass through the filter until the baffle plate 70 is gradually pushed to rotate. The water can then flow out from the bottom of the recovery tank 1 and then return to the thermal mill through an external water pipe for reuse.

[0071] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive.

[0072] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steam recovery device for thermal grinding of artificial density board, comprising a recovery tank (1), characterized in that: The bottom of the recovery tank (1) is provided with a collecting pipe (10) in communication therewith, a reciprocating screw (11) is rotatably arranged inside the recovery tank (1), an adjusting block (12) is threadedly arranged on the reciprocating screw (11), a cooling chamber (13) is provided inside the adjusting block (12), and cooling plates (14) are equidistantly arranged inside the cooling chamber (13) and penetrate the adjusting block (12) at the bottom; The recovery tank (1) is provided with a condensing element (2) for driving the steam inside the regulating block (12) to condense, the condensing element (2) comprising a partition (20), and the upper end of the recovery tank (1) is provided with a control chamber (21) and a flow chamber (22) via a T-shaped partition (20).

2. The artificial density board hot grinding steam recovery device according to claim 1, characterized in that: The recovery tank (1) is provided with a linkage (3) for driving the water flow inside the regulating block (12) to flow inside the control chamber (21) and the flow chamber (22). The linkage (3) comprises a control pipe (30). The control pipe (30) is provided at one end of the regulating block (12) in the length direction, and the control pipe (30) is communicated with the cooling chamber (13) and the control chamber (21) respectively. The control pipe (30) passes through a partition (20) and extends into the control chamber (21). A push plate (31) is provided at one end of the control pipe (30) in the control chamber (21). The other end of the regulating block (12) is provided with a connecting pipe (32) which is communicated with the flow chamber (22) and the cooling chamber (13) respectively. The connecting pipe (32) is a telescopic structure.

3. The artificial density board hot grinding steam recovery device according to claim 1, characterized in that: The cooling plate (14) is in a reciprocating bending shape inside the regulating block (12), and the bending parts are all inclined to the inner wall of the cooling chamber (13).

4. The artificial density board hot grinding steam recovery device according to claim 1, characterized in that: The portion of the bottom of the cooling plate (14) that extends out of the regulating block (12) is bent toward a side away from the reciprocating screw (11).

5. The artificial density board hot grinding steam recovery device according to claim 1, characterized in that: The recovery tank (1) is also provided with a perfecting part (4) for condensing and recovering excess steam. The perfecting part (4) comprises a rotating plate (40). The rotating plate (40) is symmetrically rotated on the top of the regulating block (12) through a torsion spring. The regulating block (12) is symmetrically provided with a delivery pipe (41) passing through the regulating block (12). The upper end of the delivery pipe (41) is flush with the top of the regulating block (12).

6. The artificial density board thermal grinding steam recovery device according to claim 1, characterized in that: The recovery tank (1) is also provided with a filtering mechanism (5) for removing impurities from the recovered steam. The filtering mechanism (5) comprises a feed hopper (50). The feed hopper (50) is provided at the bottom of the regulating block (12) and sleeved on the outside of the reciprocating screw (11). A feed pipe (51) communicating with the feed hopper (50) is provided at the bottom. The collecting pipe (10) is communicated with the bottom of the feed pipe (51). Filter plates (52) are provided inside the feed pipe (51) above the feed pipe (51) and at the bottom of the feed pipe (51).

7. The artificial density board thermal grinding steam recovery device according to claim 1, characterized in that: A feed inlet (6) is provided on one side of the two opposing cooling plates (14) located outside the regulating block (12), and the feed inlet (6) is located above the bending portion of the cooling plates (14) outside the regulating block (12).

8. The artificial density board thermal grinding steam recovery device according to claim 6, characterized in that: A blocking plate (70) is symmetrically rotatably arranged at the bottom of the recovery tank (1) via a torsion spring, and both filter plates (52) are provided with through holes corresponding to the delivery pipe (41), and a flip plate (71) is rotatably arranged in the through holes.

9. A method for recovering steam from a hot mill of an artificial density board, comprising a device for recovering steam from a hot mill of an artificial density board according to any one of claims 1 to 8, characterized in that: The steam recovery method of artificial density board hot mill is as follows: S1. Steam collection: The steam generated during the hot mill operation will enter the recovery tank (1) through the collection pipe (10); S2, steam filtration: after the steam enters the feed pipe (51), impurities in the steam are filtered by the filter plate (52); S3, volume control: by moving the regulating block (12) up and down inside the recovery tank (1), the amount of steam sucked in is controlled; S4, steam condensation: the steam enters the regulating block (12) and condenses into water when passing through the cooling plate (14) with a lower temperature, and then falls to the bottom of the recovery tank (1) for collection; S5, cooling the water: keeping the water in the cooling chamber (13) at a low temperature, and ensuring that the cooling plate (14) is kept at a low temperature; S6, Steam recovery: The condensed water can flow out from the bottom of the recovery tank (1) and return to the thermal mill for reuse.

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