Reaction kettle for sludge hydrothermal carbonization stirring

Abstract

The utility model discloses a reaction kettle used for sludge hydrothermal carbonization stirring, belongs to the technical field of reaction containers, and provides a reaction kettle used for sludge hydrothermal carbonization and capable of controlling temperature rise more easily. The reaction kettle comprises a barrel body, the top of the barrel body is fixedly connected with a dome, the bottom of the barrel body is fixedly connected with a base, and a discharging pipe is arranged at the lowest position of the base; the innermost layer of the barrel body is a wear-resistant layer, the wear-resistant layer is sleeved with a heating layer, the side wall of the heating layer is provided with a hot water cavity, a pair of partition plates is fixedly connected between the inner top surface and the inner side surface of the hot water cavity, the hot water cavity is divided into a water inlet cavity and a water outlet cavity by the two partition plates, and a convection channel is formed between the bottom surfaces of the partition plates and the inner bottom surface of the hot water cavity. By designing the separation structure of the heating layer, hot water enters from the upper end, passes through the lower end and then is discharged from the upper end in the heating layer, the hot water slowly and uniformly releases heat in the process, local overheating of sludge is effectively avoided, heating is more uniform, and temperature control is simpler and more controllable.

Description

Technical Field

[0001] This application relates to the technical field of reaction vessels, and particularly relates to a reaction kettle for sludge hydrothermal carbonization stirring. Background Art

[0002] Sludge carbonization is a means of waste resource utilization with high economy. To improve the carbonization rate, in addition to adding catalysts, the reaction needs to be carried out within a suitable temperature range. However, the temperature of the sludge itself is usually lower than the suitable temperature, and the reaction system needs to be heated. Since the sludge has poor thermal conductivity, the traditional direct heating method will cause the local temperature of the sludge to rise rapidly, and it may exceed the suitable temperature range inadvertently, resulting in a decrease rather than an increase in the reaction rate. The traditional heating method is relatively difficult to control. Summary of the Invention

[0003] The purpose of this application is to provide a reaction kettle for sludge hydrothermal carbonization that is easier to control the temperature rise.

[0004] To achieve the above purpose, this application provides a reaction kettle for sludge hydrothermal carbonization stirring: including a barrel body, the top of the barrel body is fixedly connected with a dome, the side wall of the dome is provided with a sludge injection end, the bottom of the barrel body is fixedly connected with a base, the lowest part of the base is provided with a discharge pipe, a control valve is arranged in the middle section of the discharge pipe, the innermost layer of the barrel body is a wear-resistant layer, a heating layer is sleeved outside the wear-resistant layer, the side wall of the heating layer has a hot water cavity, a pair of partition plates are fixedly connected between the inner top surface and the inner side surface of the hot water cavity, and the two partition plates divide the hot water cavity into two parts, namely an inlet water cavity and an outlet water cavity. At least the bottom surface of one partition plate forms a convection channel with the inner bottom surface of the hot water cavity. The outer side surface of the heating layer has a water inlet pipe connection end communicated with the inlet water cavity, and the outer side surface of the heating layer has a drain pipe connection end communicated with the outlet water cavity. A heat preservation layer is also sleeved outside the heating layer, and both the water inlet pipe connection end and the drain pipe connection end extend outside the heat preservation layer, which is convenient for connecting with external pipelines.

[0005] As a preference, both the water inlet pipe connection end and the drain pipe connection end are close to the upper end of the heat preservation layer and far from the convection channel located below, so that the coverage area of the hot water is as large as possible, thereby enabling the hot water to fully conduct to the sludge in the reaction kettle.

[0006] As a preference, the two partition plates are centrosymmetric about the axis center of the heat preservation layer, dividing the hot water cavity into an inlet water cavity and an outlet water cavity with equal volumes, so that the side wall of the wear-resistant layer has a gradually changing temperature zone.

[0007] As a preference, the heat preservation layer is made of a synthetic material, and the side wall of the heat preservation layer is a double-layer structure, and there is a cavity between the double-layer structures, which has better heat insulation performance.

[0008] As a preference, the heating layer is made of a copper-based alloy material, taking into account good thermal conductivity and corrosion resistance, and the wear-resistant layer is made of a nickel-based alloy material, taking into account good wear resistance and corrosion resistance.

[0009] As a preference, the dome is hemispherical, and a driving mechanism is arranged at the top of the dome. The output end of the driving mechanism is connected with a transmission shaft, and the transmission shaft extends into the barrel body and is fixedly connected with a stirring rod on the side, which is used to apply a force to the sludge to mix the sludge itself and the substances added subsequently.

[0010] As a preference, the top of the dome has a mounting table, and a shaft hole extending to the inner wall of the dome is opened on the top surface of the mounting table. The driving mechanism includes a matched motor and a reducer, and the upper end of the transmission shaft passes through the shaft hole and is connected with the output end of the reducer to obtain rotational power.

[0011] As a preference, a catalyst injection end is further arranged on the side wall of the dome, which is connected with a metering device, and automatic metering addition of the catalyst can be realized.

[0012] As a preference, the main part of the base is hemispherical, and the circular end surface of the base is fixedly connected with the lower end of the barrel body. The discharge pipe is located at the center of the hemisphere and is used to discharge the carbonized sludge out of the reaction kettle.

[0013] As a preference, a support platform is arranged on the outer side surface of the base, and a plurality of connection holes penetrating the upper and lower end surfaces are opened on the support platform for connecting parts such as bolts to pass through, so as to fix the whole reaction kettle on the platform.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows:

[0015] (1) By designing the partition structure of the heating layer, the hot water enters from the upper end in the heating layer, then passes through the lower end and is discharged from the upper end. During this process, the hot water slowly and evenly releases heat, effectively avoiding local overheating of the sludge, making the heating more uniform, and the temperature control is simpler and more controllable.

[0016] (2) By designing three layers of structures, namely a wear-resistant layer, a heating layer and a heat-insulating layer, for the main body part of the reaction kettle, and reasonably selecting materials for the three layers of structures, not only the service life of the reaction kettle is prolonged, but also the heating efficiency is improved and the energy consumption is reduced. Description of the Drawings

[0017] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the reaction kettle for sludge hydrothermal carbonization stirring.

[0018] Figure 2It is a three-dimensional sectional view of the overall structure of the reactor for sludge hydrothermal carbonization stirring.

[0019] Figure 3 It is a three-dimensional sectional view of the base, dome and barrel body of the reactor for sludge hydrothermal carbonization stirring in a mating connection.

[0020] Figure 4 It is a first three-dimensional sectional view of the heating layer of the reactor for sludge hydrothermal carbonization stirring.

[0021] Figure 5 It is a second three-dimensional sectional view of the heating layer of the reactor for sludge hydrothermal carbonization stirring.

[0022] Figure 6 It is a three-dimensional sectional view of the base of the reactor for sludge hydrothermal carbonization stirring.

[0023] Figure 7 It is a schematic three-dimensional state diagram of the dome of the reactor for sludge hydrothermal carbonization stirring and its connection structure.

[0024] In the figure: 1. Base; 101. Discharge pipe; 102. Control valve; 103. Support platform; 104. Connection hole; 2. Barrel body; 201. Heat insulation layer; 220. Heating layer; 221. Inlet water pipe connection end; 222. Drain pipe connection end; 223. Hot water chamber; 224. Partition board; 225. Convection channel; 226. Inlet water chamber; 227. Outlet water chamber; 203. Wear-resistant layer; 3. Dome; 301. Sludge injection end; 302. Catalyst injection end; 303. Installation platform; 304. Shaft hole; 4. Driving mechanism; 401. Motor; 402. Reducer; 5. Transmission shaft; 6. Stirring rod. Specific embodiments

[0025] Next, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0026] In the description of the present application, it should be noted that for orientation terms, if there are terms such as "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and position relationship is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0028] The terms "comprising" and "having" in the description and claims of this application, as well as any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0029] As Figure 1-7 shown, the reactor for sludge hydrothermal carbonization stirring includes a cylindrical barrel body 2. A hemispherical dome 3 is fixedly connected to the top of the barrel body 2. A sludge injection end 301 and a catalyst injection end 302 are provided on the side wall of the dome 3. The separate injection of sludge and catalyst is to enable the metering injection mechanism to be directly connected to the injection end. A driving mechanism 4 is provided on the top of the dome 3 for driving the stirring mechanism to move. The output end of the driving mechanism 4 is connected to a transmission shaft 5. The axis of the transmission shaft 5 is collinear with the axis of the barrel body 2 and extends into the barrel body 2. Stirring rods 6 are fixedly connected to the side of the transmission shaft 5. The number of the stirring rods 6 is several, and the several stirring rods 6 are evenly arranged on the transmission shaft 5. The top of the dome 3 has a mounting platform 303. The upper surface of the mounting platform 303 is a horizontal plane. A vertical shaft hole 304 extending to the inner wall of the dome 3 is provided on the top surface of the mounting platform 303. The driving mechanism 4 includes a matched motor 401 and a reducer 402. The output end of the motor 401 is connected to the input end of the reducer 402. The upper end of the transmission shaft 5 passes through the shaft hole 304 and is connected to the output end of the reducer 402, thereby obtaining rotational power.

[0030] A base 1 is fixedly connected to the bottom of the barrel body 2. The main part of the base 1 is also hemispherical. The circular end face of the base 1 faces upward and is fixedly connected to the lower end of the barrel body 2. A vertical discharge pipe 101 is provided at the lowest part of the base 1. Actually, the discharge pipe 101 is located in the center of the hemisphere and extends downward. A control valve 102 is provided in the middle section of the discharge pipe 101 for controlling the on / off state and opening degree of the discharge pipe 101. The innermost layer of the barrel body 2 is a wear-resistant layer 203, which is usually made of nickel-based alloy material, taking into account both wear resistance and corrosion resistance, and can be in contact with sludge for a long time. A horizontal support platform 103 is provided on the outer side of the base 1 for resting on a cement or metal platform. The support platform 103 is provided with several connection holes 104 penetrating the upper and lower end faces for bolts and other connecting pieces to pass through to fix the entire reactor on the platform.

[0031] A heating layer 220 is sleeved outside the wear-resistant layer 203 and is used to raise the temperature of the sludge in the barrel body 2. The side wall of the heating layer 220 has a hot water cavity 223. That is to say, the heating layer 220 also has a double-layer structure. The hot water cavity 223 is located between the inner and outer layers of the structure. A pair of partition plates 224 are fixedly connected between the inner top surface and the inner side surface of the hot water cavity 223. The two partition plates 224 can divide the hot water cavity 223 into two parts, an inlet water cavity 226 and an outlet water cavity 227. Usually, the two partition plates 224 are centrosymmetric about the axis center of the heat insulation layer 201, just dividing the hot water cavity 223 into an inlet water cavity 226 and an outlet water cavity 227 with equal volumes. It should be noted that a convection channel 225 is formed between the bottom surface of at least one partition plate 224 and the inner bottom surface of the hot water cavity 223. In this embodiment, convection channels 225 are formed below both of the two partition plates 224, for the hot water in the inlet water cavity 226 to enter the outlet water cavity 227. The outer side surface of the heating layer 220 has a water inlet pipe connection end 221 communicating with the inlet water cavity 226 and is used to connect with a hot water supply pipe. The outer side surface of the heating layer 220 has a drain pipe connection end 222 communicating with the outlet water cavity 227 and is used to connect with a hot water return pipe. Both the water inlet pipe connection end 221 and the drain pipe connection end 222 are close to the upper end of the heat insulation layer 201 and far from the convection channel 225, which allows the hot water to have a relatively large flow path. The heating layer 220 is made of a copper-based alloy material with a relatively high thermal conductivity and can quickly raise the temperature of the sludge in the wear-resistant layer 203.

[0032] A heat insulation layer 201 is also sleeved outside the heating layer 220 to prevent the heat of the heating layer 220 from diffusing outward. To improve the heat insulation performance, the heat insulation layer 201 is usually made of a synthetic material, such as plastic. The side wall of the heat insulation layer 201 is also a double-layer structure, and the cavity between the double-layer structures can be vacuum or filled with carbon dioxide gas, both of which have good heat insulation effects. Both the water inlet pipe connection end 221 and the drain pipe connection end 222 extend outside the heat insulation layer 201 to facilitate connection with external pipes.

[0033] Working principle: First, pour the sludge to be reacted into the barrel body 2 through the sludge injection end 301, and then quantitatively inject the reagent that can accelerate the reaction into the barrel body 2 through the catalyst injection end 302. Start the driving mechanism 4 to drive the stirring rod 6 to mix the catalyst and the sludge, so as to accelerate the reaction speed. During the reaction process, hot water will be injected into the water inlet pipe connection end 221. After the hot water enters the water inlet cavity 226, it will enter the water outlet cavity 227 through the convection channel 225 below until it almost fills the entire hot water cavity 223. The heat of the hot water is conducted to the flowing sludge through the inner wall of the heating layer 220 and the wear-resistant layer 203, causing it to heat up. The chemical reaction is further accelerated within the appropriate temperature range. After the hot water loses heat, it will cool down, and the cooled water is discharged from the drain pipe connection end 222 and recycled back to the heating device. After the sludge is mixed and the reaction is completed, the control valve 102 can be opened to discharge the carbonized sludge from the reaction kettle. After emptying, close the control valve 102 to enter the next round of operation.

[0034] The above describes the basic principle, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A reactor for sludge hydrothermal carbonization stirring, characterized in that: It includes a barrel body (2), a dome (3) is fixedly connected to the top of the barrel body (2), a sludge injection end (301) is arranged on the side wall of the dome (3), a base (1) is fixedly connected to the bottom of the barrel body (2), a discharge pipe (101) is arranged at the lowest part of the base (1), a control valve (102) is arranged in the middle section of the discharge pipe (101), the innermost layer of the barrel body (2) is a wear-resistant layer (203), a heating layer (220) is sleeved outside the wear-resistant layer (203), a hot water cavity (223) is formed on the side wall of the heating layer (220), a pair of partition plates (224) are fixedly connected between the inner top surface and the inner side surface of the hot water cavity (223), the two partition plates (224) divide the hot water cavity (223) into two parts, namely a water inlet cavity (226) and a water outlet cavity (227), a convection channel (225) is formed between the bottom surface of at least one partition plate (224) and the inner bottom surface of the hot water cavity (223), a water inlet pipe connection end (221) communicated with the water inlet cavity (226) is arranged on the outer side surface of the heating layer (220), a drain pipe connection end (222) communicated with the water outlet cavity (227) is arranged on the outer side surface of the heating layer (220), a heat preservation layer (201) is also sleeved outside the heating layer (220), and both the water inlet pipe connection end (221) and the drain pipe connection end (222) extend outside the heat preservation layer (201).

2. The reactor for sludge hydrothermal carbonization stirring according to claim 1, characterized in that: Both the water inlet pipe connection end (221) and the drain pipe connection end (222) are close to the upper end of the heat preservation layer (201).

3. The reactor for sludge hydrothermal carbonization stirring according to claim 2, characterized in that: The two partition plates (224) are centrosymmetric about the axis center of the heat preservation layer (201), and divide the hot water cavity (223) into a water inlet cavity (226) and a water outlet cavity (227) with equal volumes.

4. The reactor for sludge hydrothermal carbonization stirring according to claim 3, wherein: The heat preservation layer (201) is made of synthetic materials, and the side wall of the heat preservation layer (201) is of a double-layer structure, and there is a cavity between the double layers.

5. The reactor for sludge hydrothermal carbonization stirring according to claim 4, characterized in that: The heating layer (220) is made of a copper-based alloy material, and the wear-resistant layer (203) is made of a nickel-based alloy material.

6. The reactor for sludge hydrothermal carbonization stirring according to any one of claims 1 to 5, characterized in that: The dome (3) is hemispherical, a driving mechanism (4) is arranged at the top of the dome (3), the output end of the driving mechanism (4) is connected with a transmission shaft (5), the transmission shaft (5) extends into the barrel body (2), and a stirring rod (6) is fixedly connected to the side surface.

7. The reactor for sludge hydrothermal carbonization stirring according to claim 6, characterized in that: The top of the dome (3) has a mounting table (303), a shaft hole (304) extending to the inner wall of the dome (3) is opened on the top surface of the mounting table (303), the driving mechanism (4) includes a matched motor (401) and a reducer (402), and the upper end of the transmission shaft (5) passes through the shaft hole (304) and is connected with the output end of the reducer (402).

8. The reactor for sludge hydrothermal carbonization stirring according to claim 7, characterized in that: A catalyst injection end (302) is also arranged on the side wall of the dome (3).

9. The reactor for sludge hydrothermal carbonization stirring according to any one of claims 1 to 5, characterized in that: The main part of the base (1) is hemispherical, the circular end surface of the base (1) is fixedly connected with the lower end of the barrel body (2), and the discharge pipe (101) is located at the center of the hemisphere.

10. The reactor for sludge hydrothermal carbonization stirring according to claim 9, characterized in that: The outer side surface of the base (1) has a supporting platform (103), and a plurality of connecting holes (104) penetrating the upper and lower end faces are formed in the supporting platform (103).

Images