Steam recycling type blade dryer system
Patent Information
- Application Number
- CN202522305974.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-31
AI Technical Summary
[0004]本实用新型要解决的技术问题是：克服现有技术的不足，提供一种蒸汽循环利用式刮板干燥系统，解决以往刮板干燥系统处理污水过程中热能浪费严重、能耗高的技术问题
[0022]通过蒸汽压缩机循环利用刮板干燥器二次蒸汽，替代外源蒸汽对废水进行加热，可以大大降低外源蒸汽的用量，节约设备运行成本。
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Figure CN224798584U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy-saving and environmental protection equipment, specifically to a steam-recycling scraper drying system. Background Technology
[0002] Traditional scraper dryer systems, such as Figure 1 As shown, the system includes a scraper dryer 1, a heating jacket, a secondary steam condenser 2, and two condensate tanks. The first condensate tank is connected to the heating jacket, and the second condensate tank is connected to the secondary steam condenser 2. During operation, wastewater is pumped into the inner cavity of the scraper dryer 1. Under the stirring action of the scraper blades, a thin film forms on the inner wall of the cavity. External steam (typically at 3 bar) enters the heating jacket, whose inner wall serves as the inner cavity wall. The wastewater film exchanges heat with the external steam and evaporates. The wastewater steam is extracted using a vacuum pump and condenses into secondary steam condensate after heat exchange in the secondary steam condenser 2. The condensate, after heat exchange with the external steam, is automatically discharged from the heating jacket under the pressure of the external steam.
[0003] The current technical problems with scraper dryer systems are as follows: First, the secondary steam from the wastewater is condensed using a heat exchanger, and a large amount of heat energy is carried out of the system by the cooling circulating water, resulting in a waste of heat energy; Second, in order to maintain the normal heating of the wastewater in the inner cavity, a large amount of external steam needs to be consumed, resulting in high energy consumption. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a steam recycling scraper drying system to solve the technical problems of serious heat energy waste and high energy consumption in the previous scraper drying system for sewage treatment.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] First aspect:
[0007] A steam-recycling scraper drying system is provided, including...
[0008] A scraper dryer has a drying chamber connected to a feed pipe and a waste gas outlet pipe, and a heating jacket connected to an external steam inlet pipe and a condensate outlet pipe. The waste gas outlet pipe is connected to a first outlet pipe and a second outlet pipe. A first solenoid valve is installed on the first outlet pipe, a second solenoid valve is installed on the second outlet pipe, and a third solenoid valve is installed on the external steam inlet pipe.
[0009] A steam compressor, wherein the steam compressor inlet is connected to a first outlet pipe, and the exhaust outlet pipe outlet is connected to an external steam inlet pipe;
[0010] The raw water tank is connected to the feed pipe. The exhaust gas in the second outlet pipe and the condensate in the condensate outlet pipe are discharged to the outside after exchanging heat with the raw water tank.
[0011] Furthermore, a gas-liquid separator and a filter are installed on the exhaust pipe.
[0012] Furthermore, a heat exchanger is installed inside the raw water tank, and both the second outlet pipe and the condensate outlet pipe are connected to the heat exchanger.
[0013] Furthermore, the heat exchanger is connected to a condensate tank, and a water supply pipe is connected between the condensate tank and the steam compressor.
[0014] Furthermore, a safety valve is provided on the heating jacket.
[0015] Furthermore, a pressure sensor is installed on the heating jacket.
[0016] The second aspect:
[0017] A method for operating the aforementioned steam recycling scraper drying system is provided, characterized in that:
[0018] The scraper dryer is for intermittent feeding and discharging. After feeding is completed, the third solenoid valve on the external steam inlet pipe is opened to control the heating jacket to heat the wastewater in the drying chamber. When the wastewater is heated to the initial boiling point, the steam compressor is started to extract the secondary steam and convert it into high-grade steam for reuse in the external steam inlet pipe. During the evaporation and drying process, as the moisture in the material is gradually evaporated, the secondary steam output gradually decreases until it reaches zero.
[0019] When the steam pressure inside the heating jacket exceeds 3 bar, the third solenoid valve is closed, and high-grade steam output from the steam compressor is used to supply steam to the heating jacket.
[0020] When the pressure inside the heating jacket is lower than 3 bar, open the third solenoid valve to supplement external steam until the jacket steam pressure reaches 3 bar or higher, and then close the third solenoid valve.
[0021] The beneficial effects of this utility model are:
[0022] By using a steam compressor to recycle the secondary steam from the scraper dryer to replace external steam for heating wastewater, the amount of external steam used can be greatly reduced, saving equipment operating costs.
[0023] By recovering heat energy from distilled water through the raw water tank heat exchanger, the inlet water temperature of the scraper dryer can be increased, which can reduce the amount of heating steam used during the scraper start-up phase and reduce equipment energy consumption. Attached Figure Description
[0024] The present invention will be further described below with reference to the accompanying drawings.
[0025] Figure 1 This is a schematic diagram of a traditional scraper dryer system;
[0026] Figure 2 This is a schematic diagram of the scraper dryer system of this utility model;
[0027] Among them, 1. scraper dryer, 11. heating jacket, 2. steam condenser, 3. steam compressor, 41. gas-liquid separator, 42. filter, 51. first solenoid valve, 52. second solenoid valve, 53. third solenoid valve; 6. raw water tank, 71. safety valve, 72. pressure sensor. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0029] This application provides a steam-recirculating scraper drying system, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.
[0030] To address the technical problems of severe heat energy waste and high energy consumption in the wastewater treatment process of existing scraper drying systems, one embodiment of this application provides a steam recycling scraper drying system. This is described in detail below.
[0031] like Figure 2 As shown, a steam recycling scraper drying system includes...
[0032] The scraper dryer 1 has a drying chamber connected to a feed pipe and a waste gas outlet pipe, and a heating jacket 11 connected to an external steam inlet pipe and a condensate outlet pipe. The waste gas outlet pipe is connected to a first outlet pipe and a second outlet pipe. A first solenoid valve 51 is installed on the first outlet pipe, a second solenoid valve 52 is installed on the second outlet pipe, and a third solenoid valve 53 is installed on the external steam inlet pipe.
[0033] Steam compressor 3, wherein the air inlet of the steam compressor 3 is connected to the first outlet pipe, and the air outlet of the exhaust outlet pipe is connected to the external steam inlet pipe;
[0034] Raw water tank 6, the feed pipe is connected to raw water tank 6, the exhaust gas in the second outlet pipe and the condensate in the condensate outlet pipe are discharged outward after exchanging heat with raw water tank 6.
[0035] Specifically, as an optional implementation in this embodiment, a gas-liquid separator 41 and a filter 42 are provided on the exhaust gas outlet pipe.
[0036] The steam compressor 3 has high requirements for the cleanliness of the intake air. Therefore, a gas-liquid separator 41 is installed at the secondary steam outlet of the scraper dryer 1 to prevent the secondary steam from carrying droplets or other impurities. A filter 42 is installed after the gas-liquid separator 41 to purify the secondary steam and ensure the cleanliness of the compressor intake air.
[0037] Specifically, as an optional implementation in this embodiment, a heat exchanger is installed inside the raw water tank 6, and both the second outlet pipe and the condensate outlet pipe are connected to the heat exchanger.
[0038] By recovering the heat of the secondary steam discharged from the second outlet pipe and the heat of the condensate discharged from the condensate outlet pipe through the heat exchanger, and by recovering the heat energy of the distilled water through the heat exchanger in the raw water tank 6, the inlet water temperature of the scraper dryer 1 can be increased, thereby reducing the amount of heating steam used during the scraper start-up phase and reducing equipment energy consumption.
[0039] Specifically, as an optional implementation in this embodiment, the heat exchanger is connected to a condensate tank, and a water supply pipe is connected between the condensate tank and the steam compressor 3.
[0040] Specifically, as an optional implementation in this embodiment, a safety valve 71 is provided on the heating jacket 11. The safety valve 71 is used to ensure the air pressure inside the heating jacket 11 and prevent it from bursting.
[0041] Specifically, as an optional implementation in this embodiment, a pressure sensor 72 is provided on the heating jacket 11. The pressure sensor 72 senses the pressure inside the heating jacket 11 in real time, thereby controlling the opening and closing of the solenoid valve. When the steam pressure inside the jacket is lower than 3 bar, external steam begins to replenish the pressure. When the steam pressure in the heating jacket 11 reaches 3 bar or higher, high-temperature steam is supplied by a steam compressor.
[0042] The working principle of this utility model steam recycling scraper drying system is as follows: the low-grade secondary steam generated by the evaporation of wastewater in the drying chamber is compressed and heated by the steam compressor 3 to form high-grade steam, which replaces the external steam and is reused in the heating jacket 11 to heat the wastewater.
[0043] The working method of the above-mentioned steam recycling scraper drying system is as follows: the scraper dryer 1 is intermittently fed and discharged. After the feeding is completed, the third solenoid valve 53 on the external steam inlet pipe is opened to control the heating jacket 11 to heat the wastewater in the drying chamber. When the wastewater is heated to the initial boiling point, the steam compressor is started to extract the secondary steam and convert it into high-grade steam for reuse in the external steam inlet pipe. During the evaporation and drying process, as the moisture of the material is gradually evaporated, the secondary steam output gradually decreases until it reaches zero.
[0044] During the first half of the drying process, there is sufficient secondary steam in the drying chamber. When the steam pressure in the heating jacket 11 is greater than 3 bar, the third solenoid valve 53 is closed, and the high-grade steam output by the steam compressor is used to supply steam to the heating jacket 11.
[0045] When the wastewater in the inner cavity dries to a certain extent and the secondary steam cannot meet the needs of the compressor operation, the pressure inside the heating jacket 11 gradually drops below 3 bar. Then, the third solenoid valve 53 is opened to supplement external steam until the jacket steam pressure reaches above 3 bar. Then, the third solenoid valve 53 is closed.
[0046] In this embodiment, since most of the secondary steam is converted into high-grade steam and condensed with wastewater through heat exchange, the temperature of the condensate is basically around 90°C. This part of the heat energy is recovered through the heat exchanger of the raw water tank 6, maximizing the recovery of the system's heat energy.
[0047] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.
[0048] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0049] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0050] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.
[0051] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0052] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0053] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A steam-recycling scraper drying system, characterized in that, include A scraper dryer has a drying chamber connected to a feed pipe and a waste gas outlet pipe, and a heating jacket connected to an external steam inlet pipe and a condensate outlet pipe. The waste gas outlet pipe is connected to a first outlet pipe and a second outlet pipe. A first solenoid valve is installed on the first outlet pipe, a second solenoid valve is installed on the second outlet pipe, and a third solenoid valve is installed on the external steam inlet pipe. A steam compressor, wherein the steam compressor inlet is connected to a first outlet pipe, and the exhaust outlet pipe outlet is connected to an external steam inlet pipe; The raw water tank is connected to the feed pipe. The exhaust gas in the second outlet pipe and the condensate in the condensate outlet pipe are discharged to the outside after exchanging heat with the raw water tank.
2. The steam-recycling scraper drying system according to claim 1, characterized in that, A gas-liquid separator and a filter are installed on the exhaust pipe.
3. The steam-recycling scraper drying system according to claim 1, characterized in that, A heat exchanger is installed inside the raw water tank, and the second outlet pipe and the condensate outlet pipe are both connected to the heat exchanger.
4. The steam-recycling scraper drying system according to claim 3, characterized in that, The heat exchanger is connected to a condensate tank, and a water supply pipe is connected between the condensate tank and the steam compressor.
5. The steam-recycling scraper drying system according to claim 1, characterized in that, A safety valve is installed on the heating jacket.
6. The steam-recycling scraper drying system according to claim 1, characterized in that, A pressure sensor is installed on the heating jacket.