Noise reduction and waste heat recovery device for steam curing kettle exhaust port
By setting up a silencer, first- and second-level waste heat recovery device at the exhaust port of the steam cauldron, the problems of incomplete recovery of steam waste heat and serious noise pollution are solved, and efficient recycling of steam waste heat and effective noise reduction are achieved.
Patent Information
- Application Number
- CN202421971264.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-15
AI Technical Summary
In the production process of steam pressurized concrete blocks, the steam waste heat is not completely recovered and utilized, resulting in serious noise pollution and affecting the physical and mental health of workshop staff.
A steam cauldron exhaust device including a silencer, a primary waste heat recovery device and a secondary waste heat recovery device is designed to reduce noise through the silencer. The primary and secondary waste heat recovery devices recover the steam waste heat through the cooling assembly and the condensation assembly respectively, and return the recovered hot water to the steam boiler and the mixing tank.
It effectively reduces noise pollution during steam emissions, and realizes efficient recycling of steam waste heat, improves the heating efficiency of steam boiler and the stirring effect of the mixing tank, and avoids waste heat waste.
Smart Images
Figure CN222987233U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of brick production, and in particular relates to a silencing and waste heat recovery device for an exhaust port of a steam curing kettle. Background Art
[0002] Steam-pressurized concrete blocks are made of fly ash as the main raw material, with foaming agent added, water added and stirred, and voids formed by chemical reaction. The blocks are then cast, pre-cured, cut, and autoclaved to form a silicate building material with a highly dispersed porous structure. The material has good sound insulation and heat insulation properties, and is light and earthquake-resistant, making it a high-quality wall material. The curing kettle is an indispensable device used in the autoclaving process of steam-pressurized concrete. When the curing kettle performs autoclaving curing on concrete blocks, the fresh steam generated by the steam boiler is first used to steam-cure the concrete blocks under a certain pressure. After the concrete blocks are steamed in the curing kettle, the steam in the curing kettle still has a good temperature and pressure. Direct discharge will cause a large amount of steam waste heat waste. At present, after the concrete blocks are autoclaved in the curing kettle, the steam discharged from the curing kettle is basically transported to the pre-curing kettle by the steam adjustment method to realize the recovery of waste heat. This waste heat recovery method cannot completely realize the recovery of steam, and can only recover part of the steam. Most of the remaining steam will still be discharged at will, which cannot realize the cascade utilization of waste heat steam. At the same time, in the process of steam discharge from the curing kettle, since the waste heat steam has a certain pressure, it will generate a lot of noise during the discharge process, which seriously affects the physical and mental health of the workshop staff. Therefore, it is an objective need to develop a silencer and waste heat recovery device for the exhaust port of the curing kettle with a reasonable structure that can reduce noise pollution and realize efficient recovery of steam waste heat. Summary of the invention
[0003] The utility model aims to provide a silencing and waste heat recovery device for the exhaust port of a steam curing kettle which has a reasonable structure, can reduce noise pollution, and can realize efficient recovery and utilization of steam waste heat.
[0004] The purpose of the utility model is achieved in this way, comprising a steam boiler, a steam curing kettle and a steam delivery pipe arranged between the steam boiler and the steam curing kettle, a steam discharge pipe is arranged on the top of the steam curing kettle at the end opposite to the steam delivery pipe, a silencer, a primary waste heat recovery device and a secondary waste heat recovery device are arranged in sequence on the steam discharge pipe, a cooling component is arranged inside the primary waste heat recovery device, a first water inlet is arranged at the lower part of the primary waste heat recovery device, a first water outlet is arranged at the upper part of the primary waste heat recovery device, the first water outlet is communicated with the water replenishment port of the steam boiler through the first delivery pipe, a condensation component is arranged inside the secondary waste heat recovery device, a second water inlet is arranged on one side of the secondary waste heat recovery device, a second water outlet is arranged on the other side, and the second water outlet is communicated with the water inlet of the mixing tank through the second delivery pipe.
[0005] The beneficial effects produced by this device are as follows: First, a silencer is provided at the exhaust port of the autoclave. The silencer can reduce the noise generated during steam discharge, ensuring that no sound penetrates to the outside during the movement of steam inside the silencer, thereby reducing noise pollution in the workshop environment and ensuring the physical and mental health of workshop staff. Second, a primary waste heat recovery device and a secondary waste heat recovery device are provided at the outlet of the silencer. The cooling component provided inside the primary waste heat recovery device can effectively cool the steam, recover approximately 50% of the waste heat in the steam, and the hot water after absorbing heat can return to the steam boiler as makeup water, which can effectively improve the heating efficiency of the steam boiler. The condensation component inside the secondary waste heat recovery device can condensate the steam again, recover more than 40% of the waste heat in the steam, and the water after absorbing heat can return to the mixing tank for use as mixing water, which can improve the mixing efficiency of the building blocks. The arrangement of the primary preheater and the secondary waste heat recovery device can effectively recover the waste heat of the steam and use the recovered waste heat in the production process of concrete building blocks. It can not only achieve the cascade utilization of steam waste heat, avoid waste of steam waste heat, but also has a high waste heat recovery utilization rate, with the advantages of reasonable structure, low noise pollution, and high waste heat utilization rate, and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 is a schematic diagram of the overall structure of the present utility model;
[0007] Figure 2 is a schematic diagram of the structure of the silencer 5 in the present utility model;
[0008] Figure 3 is a schematic diagram of the structure of the secondary waste heat recovery device 7 in the present utility model;
[0009] In the figure: 1 - steam boiler, 2 - autoclave, 3 - steam delivery pipe, 4 - steam discharge pipe, 5 - silencer, 51 - outer shell, 52 - filter box, 53 - silencing pipe, 54 - silencing ball, 55 - connecting pipe, 56 - sound-absorbing cotton, 57 - fixing rod, 58 - sound-absorbing blade, 6 - primary recovery device, 61 - first water inlet, 62 - first water outlet, 63 - upper distribution plate, 64 - lower converging plate, 65 - cooling pipe, 7 - secondary waste heat recovery device, 71 - second water inlet, 72 - second water outlet, 73 - upper condensation plate, 74 - lower condensation plate, 75 - baffle plate, 76 - liquid guiding hole, 77 - drain pipe, 78 - adjusting screw, 79 - limiting block, 710 - driving motor, 711 - sealing ring 8 - first delivery pipe, 9 - second delivery pipe, 10 - mixing tank. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0010] The present utility model will be further described below in conjunction with the accompanying drawings, but it is not limited to the present utility model in any way. Any change or improvement made based on the teachings of the present utility model falls within the protection scope of the present utility model.
[0011] Figures 1 to 3 As shown, the present utility model includes a steam boiler 1, a steam curing kettle 2, and a steam delivery pipe 3 disposed between the steam boiler 1 and the steam curing kettle 2. Both the steam boiler 1 and the steam curing kettle 2 adopt the structures used in the prior art. A steam discharge pipe 4 is provided at the top of the steam curing kettle 2 at the opposite end to the steam delivery pipe 3. A silencer attenuator 5, a primary waste heat recovery device 6, and a secondary waste heat recovery device 7 are sequentially provided on the steam discharge pipe 4. A temperature reduction component is provided inside the primary waste heat recovery device 6. A first water inlet 61 is provided at the lower part of the primary waste heat recovery device 6, and a first water outlet 62 is provided at the upper part. The first water outlet 62 is communicated with the water replenishing port of the steam boiler 1 through a first delivery pipe 8. A condensation component is provided inside the secondary waste heat recovery device 7. A second water inlet 71 is provided on one side of the secondary waste heat recovery device 7, and a second water outlet 72 is provided on the other side. The second water outlet 72 is communicated with the water inlet of a mixing tank 10 through a second delivery pipe 9.
[0012] The working process of this device is as follows: After the concrete blocks are cured in the steam curing kettle 2, the steam discharge pipe 4 is opened, and the steam in the steam curing kettle 2 will enter the silencer attenuator 5 through the steam discharge pipe 4. The silencer attenuator 5 has the function of noise reduction and attenuation. When the steam moves in the silencer attenuator 5, the noise will not be transmitted to the outside. Part of the steam discharged from the silencer attenuator 5 is sent into the pre-curing kettle, and the other part first enters the temperature reduction component of the primary waste heat recovery device 6. At this time, cold water is delivered into the primary waste heat recovery device 6 through the first water inlet 61. After the cold water enters the primary waste heat recovery device 6, it will continuously absorb the heat of the steam. The temperature of the cold water after absorbing the heat continuously rises to form hot water. The generated hot water is discharged through the first water outlet 62 and enters the steam boiler 1 through the first delivery pipe 8 as makeup water, which can improve the heating efficiency of the steam. After the steam is cooled by the absorption of heat by the cold water, the cooled steam enters the secondary waste heat recovery device 7. At this time, cold water is introduced into the secondary waste heat recovery device 7, and the cold water absorbs the heat of the steam again. The cold water after absorbing the heat forms warm water. The warm water is discharged through the second water outlet 72 and enters the mixing tank 10 through the second delivery pipe 9 as the water for raw material mixing, which can improve the effect of raw material mixing. The steam after being secondarily condensed by the condensation component is directly discharged after being condensed. The arrangement of the primary preheater 6 and the secondary waste heat recovery device 7 provided in this device can better recover the waste heat of the steam and use the recovered waste heat in the production and processing process of concrete blocks. It can not only realize the cascade utilization of steam waste heat, avoid the waste of steam waste heat, but also has a high waste heat recovery utilization rate.
[0013] Furthermore, the silencer 5 includes a housing 51 and a filter box 52. The filter box 52 is installed at the lower part inside the housing 51. An air inlet communicating with the steam discharge pipe 4 is provided at the bottom of the filter box 52. The filter box 52 is filled with a filter element. A plurality of sound-absorbing pipes 53 communicating with the filter box 52 are evenly arranged on the outer side of the filter box 52. The ends of the sound-absorbing pipes 53 are sealed by a sealing plate. A sound-absorbing ball 54 with a hollow interior is installed at the upper part inside the filter box 52. Sound-insulating plates are provided on the inner wall of the sound-absorbing ball 54. The sound-insulating plates are made of heat-resistant materials used in the prior art and are arranged in a fitting manner with the inner wall of the sound-absorbing ball 54. The sound-absorbing pipes 53 are communicated with the sound-absorbing ball 54 through a connecting pipe 55. An air outlet communicating with the steam discharge pipe 4 is provided at the top of the sound-absorbing ball 54. The inner voids of the housing 51 are all filled with sound-absorbing cotton 56. The sound-absorbing cotton 56 can be made of glass wool material used in the prior art. During use, the steam first enters the filter box 52. The filter element in the filter box 52 can filter impurities in the steam to prevent blockage of the device pipeline. The filter element 52 can be a sintered metal powder filter element, a titanium rod filter element, etc. used in the prior art. The filtered steam is divided into multiple strands and enters the sound-absorbing pipes 53. Due to the function of the sound-absorbing cotton 56, the sound-absorbing cotton 56 can perform preliminary noise reduction on the steam. Then the steam enters the sound-absorbing ball 54 through the connecting pipe. The sound-insulating plates in the sound-absorbing ball 54 perform secondary noise reduction on the steam, reducing the intensity of noise transmitted to the outside, thereby solving the problem of noise pollution caused by steam discharge. In order to achieve a better sound-absorbing and noise-reducing effect, a fixing rod 57 is installed inside the sound-absorbing pipe 53 along the axial direction of the sound-absorbing pipe 53. A sound-absorbing blade 58 in a spiral structure is installed on the fixing rod 57. The material of the sound-absorbing blade 58 is the same as the structure of the sound-absorbing cotton. The spirally arranged sound-absorbing blades 58 can perform multiple sound absorptions on the steam to improve the steam sound-absorbing effect.
[0014] Further, the cooling component includes an upper distribution plate 63 and a lower converging plate 64 with a hollow interior. The upper distribution plate 63 and the lower converging plate 64 are installed at intervals up and down inside the primary waste heat recovery device 6. To facilitate the flow of steam, the upper distribution plate 63 can be set as a conical structure with a smaller upper end and a larger lower end, and the lower converging plate 64 can be set as a structure with a larger upper end and a smaller lower end. A plurality of cooling pipes 65 are installed between the upper distribution plate 63 and the lower converging plate 64. An air inlet communicating with the steam delivery pipe 3 is provided on the upper distribution plate 63, and an air outlet communicating with the steam delivery pipe 3 is provided on the lower converging plate 64. During use, after the steam is distributed by the upper distribution plate 63, it evenly flows into the cooling pipes 65. At this time, the cold water will absorb the waste heat of the steam in the cooling pipes 65. The plurality of cooling pipes 65 provided can increase the heat exchange area between the steam and the cold water and improve the heat exchange effect. Preferably, the cooling pipes 65 are arranged in a spiral shape. The spiral arrangement of the cooling pipes 65 can extend the flow time of the steam in the cooling pipes 65 and prolong the contact time between the steam and the cold water, further improving the heat exchange effect.
[0015] Further, the condensation assembly includes an upper condensation plate 73 and a lower condensation plate 74 which are installed at intervals up and down in the secondary waste heat recovery device 7. The upper condensation plate 73 and the lower condensation plate 74 divide the inner cavity of the waste heat recovery device 7 into an endothermic cavity, a condensation cavity and a liquid discharge cavity from top to bottom. The second water inlet 71 and the second water outlet 72 are arranged on the side wall of the endothermic cavity. An air inlet communicated with the steam discharge pipe 4 is arranged on one side of the condensation cavity, and an air outlet communicated with the steam discharge pipe 4 is arranged on the other side. A plurality of baffle plates 75 are vertically installed on the bottom surface of the upper condensation plate 73 and the top surface of the lower condensation plate 74. Adjacent two baffle plates 75 are arranged in a staggered manner up and down on the upper condensation plate 73 and the lower condensation plate 74. A plurality of liquid guide holes 76 are processed through the lower condensation plate 74. A liquid discharge pipe 77 is installed at the bottom of the liquid discharge cavity, and a liquid discharge valve is installed on the liquid discharge pipe 77. During use, steam enters the condensation cavity, and cold water enters the endothermic cavity. The steam flows in a curve between the upper and lower baffle plates 75. During the flowing process of the steam, the cold water in the endothermic cavity will continuously absorb the heat in the steam. The warm water after absorbing the heat is discharged from the second water outlet 72. After the steam is absorbed by the cold water, the temperature continuously decreases, and the moisture in the steam will be condensed to form condensed water. The formed condensed water falls into the liquid discharge cavity from the liquid guide holes 76, and the liquid discharge pipe 77 is regularly opened to discharge the condensed water. The steam after condensation can be directly discharged into the atmosphere. In order to improve the steam condensation effect, the lower condensation plate 74 is fixedly installed on the inner wall of the secondary waste heat recovery device 7. A threaded hole is processed at the center of the upper condensation plate 73. An adjusting screw rod 78 is threadedly connected in the threaded hole. A limiting block 79 is installed at the lower end of the adjusting screw rod 78. The upper end of the adjusting screw rod 78 is rotatably installed at the top of the secondary waste heat recovery device 7. A driving motor 710 connected to the adjusting screw rod 78 is installed above the secondary waste heat recovery device 7. The outer edge of the upper condensation plate 73 is in sliding contact with the inner wall of the secondary waste heat recovery device 7. The driving motor 710 drives the adjusting screw rod 78 to rotate. During the rotation of the adjusting screw rod 78, the upper condensation plate 73 can be driven to move up and down, so as to adjust the space size of the condensation cavity, increase the flow space of the steam in the condensation cavity, and improve the cold water condensation effect on the steam. Preferably, a sealing ring 711 is arranged on the outer edge of the upper condensation plate 73. The sealing ring 711 has a sealing function, which can ensure that the endothermic cavity and the condensation cavity are not communicated during the up and down movement of the upper condensation plate 73, which is beneficial to improving the steam condensation effect.
Claims
1. A silencing and waste heat recovery device for an exhaust port of a steam curing kettle, comprising a steam boiler (1), a steam curing kettle (2), and a steam delivery pipe (3) arranged between the steam boiler (1) and the steam curing kettle (2), characterized in that A steam discharge pipe (4) is arranged on the top of the steam curing kettle (2) at the end opposite to the steam delivery pipe (3), and a silencer (5), a primary waste heat recovery device (6) and a secondary waste heat recovery device (7) are arranged in sequence on the steam discharge pipe (4). A cooling component is arranged inside the primary waste heat recovery device (6). A first water inlet (61) is arranged at the lower part of the primary waste heat recovery device (6), and a first water outlet (62) is arranged at the upper part. The first water outlet (62) is communicated with the water supply port of the steam boiler (1) through a first delivery pipe (8). A condensing component is arranged inside the secondary waste heat recovery device (7). A second water inlet (71) is arranged on one side of the secondary waste heat recovery device (7), and a second water outlet (72) is arranged on the other side. The second water outlet (72) is communicated with the water inlet of the mixing tank (10) through a second delivery pipe (9).
2. The device for silencing and recovering residual heat at the exhaust port of a steam curing kettle according to claim 1, characterized in that: The silencer (5) comprises an outer shell (51) and a filter box (52), wherein the filter box (52) is installed at the lower part of the outer shell (51), and the bottom of the filter box (52) is provided with an air inlet connected to the steam exhaust pipe (4), and the filter box (52) is filled with a filter element, and a plurality of silencer pipes (53) connected to the filter box (52) are evenly arranged on the outer side of the filter box (52), and the ends of the silencer pipes (53) are sealed by sealing plates, and a silencer ball (54) with a hollow interior is installed at the upper part of the filter box (52), and a sound insulation board is provided on the inner wall of the silencer ball (54), and the silencer pipe (53) is connected to the silencer ball (54) through a connecting pipe (55), and the top of the silencer ball (54) is provided with an air outlet connected to the steam exhaust pipe (4), and the internal gaps of the outer shell (51) are filled with sound-absorbing cotton (56).
3. The silencing and waste heat recovery device for the exhaust port of a steam curing kettle according to claim 2, characterized in that: A fixing rod (57) is installed inside the muffler pipe (53) along the axial direction of the muffler pipe (53), and a sound-absorbing blade (58) with a spiral structure is installed on the fixing rod (57).
4. The device for silencing and recovering residual heat at the exhaust port of a steam curing kettle according to claim 1, characterized in that: The cooling component comprises an upper distribution plate (63) and a lower converging plate (64) which are hollow inside. The upper distribution plate (63) and the lower converging plate (64) are installed inside the first-stage waste heat recovery device (6) at intervals from top to bottom. A plurality of cooling pipes (65) are installed between the upper distribution plate (63) and the lower converging plate (64). The upper distribution plate (63) is provided with an air inlet which is connected to the steam delivery pipe (3), and the lower converging plate (64) is provided with an air outlet which is connected to the steam delivery pipe (3).
5. The device for silencing and recovering residual heat at the exhaust port of a steam curing kettle according to claim 4, characterized in that: The cooling pipe (65) is arranged in a spiral shape.
6. The device for silencing and recovering residual heat at the exhaust port of a steam curing kettle according to claim 1, characterized in that: The condensation assembly comprises an upper condensation plate (73) and a lower condensation plate (74) which are installed in the secondary waste heat recovery device (7) at an interval from top to bottom. The upper condensation plate (73) and the lower condensation plate (74) divide the inner cavity of the waste heat recovery device (7) from top to bottom into a heat absorption cavity, a condensation cavity and a liquid discharge cavity. The second water inlet (71) and the second water outlet (72) are arranged on the side wall of the heat absorption cavity. One side of the condensation cavity is provided with an air inlet which is connected to the steam exhaust pipe (4). The other side of the condensation cavity is provided with an air inlet which is connected to the steam exhaust pipe (4). An air outlet connected to a steam discharge pipe (4) is provided, and a plurality of baffles (75) are vertically installed on the bottom surface of the upper condensation plate (73) and the top surface of the lower condensation plate (74), and two adjacent baffles (75) are arranged alternately up and down on the upper condensation plate (73) and the lower condensation plate (74), and a plurality of liquid guide holes (76) are machined through the lower condensation plate (74), and a liquid discharge pipe (77) is installed at the bottom of the liquid discharge cavity, and a liquid discharge valve is installed on the liquid discharge pipe (77).
7. The device for silencing and recovering residual heat at the exhaust port of a steam curing kettle according to claim 6, characterized in that: The lower condensation plate (74) is fixedly mounted on the inner wall of the secondary waste heat recovery device (7), a threaded hole is processed at the center of the upper condensation plate (73), an adjusting screw (78) is threadedly connected to the threaded hole, a limit block (79) is installed at the lower end of the adjusting screw (78), and the upper end of the adjusting screw (78) is rotatably mounted on the top of the secondary waste heat recovery device (7), a driving motor (710) connected to the adjusting screw (78) is installed above the secondary waste heat recovery device (7), and the outer edge of the upper condensation plate (73) is in sliding contact with the inner wall of the secondary waste heat recovery device (7).
8. The device for silencing and recovering residual heat at the exhaust port of a steam curing kettle according to claim 7, characterized in that: A sealing ring (711) is provided on the outer edge of the upper condensation plate (73).