Reaction kettle for sludge treatment

Abstract

The utility model provides a reaction kettle for sludge treatment, which relates to the technical field of reaction equipment for sludge treatment, and comprises a kettle body, a kettle cover, a stirrer, a main control unit and a monitoring unit, the kettle body extends along the height direction and is provided with a reaction cavity with a top opening, and the reaction cavity is used for accommodating a reaction medium; the kettle cover is connected with the top surface of the kettle body and is used for sealing the top surface of the reaction cavity, and corrosion-resistant layers are arranged on the inner wall surface of the reaction cavity and the bottom surface of the kettle cover; the stirrer is connected with the kettle cover; the stirring end of the stirrer extends to the reaction cavity and is suitable for stirring the reaction medium; the main control unit is electrically connected with the stirrer and the monitoring unit, the monitoring unit is used for monitoring at least one parameter information of the temperature, the pressure and the liquid level in the reaction cavity, and the main control unit is suitable for performing interlocking control on the temperature, the pressure and the liquid level of the reaction cavity. The high-temperature and high-pressure sludge treatment device has good corrosion resistance, can treat sludge under high-temperature and high-pressure conditions, and is low in operation risk.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction equipment for sludge treatment, in particular to a reaction kettle for sludge treatment. Background Art

[0002] The sludge hydrothermal carbonization technology is a newly emerging sludge treatment technology at present. It adopts high-pressure hydrothermal technology, does not require drying of raw materials, and can use the water in the raw materials as a solvent to accelerate the carbonization process, improve the heat transfer efficiency, and avoid local overheating. Compared with other thermochemical technologies such as pyrolysis and incineration, hydrothermal carbonization has the advantages of relatively mild reaction conditions, relatively low energy consumption, and certain operating cost savings.

[0003] The sludge reaction medium mainly contains components such as sludge stock solution, sulfuric acid, nitrogen, phosphorus, potassium, heavy metals, etc., and is accompanied by volatile organic gases. The diversity and uncertainty of the sources of its medium components have put forward high requirements for the process conditions of sludge treatment. In related technologies, autoclaves, as commonly used equipment in the chemical industry, are widely used, but there is no special autoclave structure suitable for sludge under high-temperature and high-pressure hydrothermal carbonization reactions in the sludge hydrothermal carbonization technology, and conventional high-temperature and high-pressure autoclaves have insufficient pressure and corrosion resistance in sludge hydrothermal carbonization treatment. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related technologies to a certain extent.

[0005] Therefore, an embodiment of the utility model provides a reaction kettle for sludge treatment. The reaction kettle for sludge treatment has good corrosion resistance, can realize the treatment of sludge under high-temperature and high-pressure conditions, and has low operation risks.

[0006] A reaction kettle for sludge treatment according to an embodiment of the utility model includes a kettle body, a kettle cover, a stirrer, a main control unit, and a monitoring unit. The kettle body extends along the height direction and has a reaction cavity with an opening at the top. The reaction cavity is used to accommodate a reaction medium. The kettle cover is connected to the top surface of the kettle body and is used to seal the top surface of the reaction cavity. Corrosion-resistant layers are provided on the inner wall surface of the reaction cavity and the bottom surface of the kettle cover. The stirrer is connected to the kettle cover, and the stirring end of the stirrer extends into the reaction cavity and is adapted to stir the reaction medium. The main control unit is electrically connected to the stirrer and the monitoring unit. The monitoring unit is used to monitor at least one parameter information of the temperature, pressure, and liquid level in the reaction cavity. The main control unit is adapted to perform interlock control on the temperature, pressure, and liquid level of the reaction cavity.

[0007] According to a reactor for sludge treatment in an embodiment of the utility model, a corrosion-resistant layer is arranged on the inner wall surface of the reaction chamber and the bottom surface of the reactor cover, so that when the reaction medium (i.e., sludge) is stirred by an agitator for hydrothermal carbonization treatment under the high temperature and high pressure environment of the reaction chamber, the strong corrosiveness formed by the reaction medium during the reaction process will not corrode the reactor body and the reactor cover. At the same time, the main control unit can control the heating and exhaust conditions of the reaction chamber and the injection and discharge conditions of the reaction medium in real time according to the comparison between any one of the parameter information of temperature, pressure and liquid level detected by the monitoring unit and the corresponding set parameters, so as to ensure the safe and effective operation of the reactor. Therefore, compared with the related art, the utility model has good corrosion resistance, can realize the treatment of sludge under high temperature and high pressure conditions, and has low operation risk.

[0008] In some embodiments, the kettle cover is also provided with a feed port and a discharge port connected to the reaction chamber, and the feed port and the discharge port are both provided with a first sleeve with openings at both ends, the lower end of the first sleeve of the feed port extends to the reaction chamber and is located above the liquid level of the reaction medium, and the lower end of the first sleeve of the discharge port extends to the reaction chamber and is located below the lowest liquid level of the reaction medium.

[0009] In some embodiments, the kettle cover is further provided with a temperature measuring port, a pressure measuring port and a liquid level port connected to the reaction chamber, and the temperature measuring port, the pressure measuring port and the liquid level port are all provided with a second sleeve extending along the height direction and having openings at both ends;

[0010] The monitoring unit includes a first temperature measuring thermocouple, a pressure gauge and a liquid level gauge. The first temperature measuring thermocouple is matched with the second sleeve of the temperature measuring port and is used to monitor the temperature of the reaction chamber. The pressure gauge monitors the pressure of the reaction chamber through the second sleeve of the pressure measuring port. The liquid level gauge is matched with the second sleeve of the liquid level port and is used to monitor the liquid level of the reaction chamber.

[0011] In some embodiments, there are multiple temperature measuring ports, and there are multiple first temperature measuring thermocouples corresponding one-to-one with the temperature measuring ports.

[0012] In some embodiments, there are multiple pressure measuring ports, each of which is provided with the second sleeve, and the parts of the second sleeves of all the pressure measuring ports away from the pressure measuring ports are connected to the same connecting pipe, and the pressure gauge is installed on the connecting pipe.

[0013] In some embodiments, the monitoring unit further includes a pressure transmitter, which is mounted on the connecting pipe and electrically connected to the main control unit.

[0014] In some embodiments, at least one of the kettle body, the kettle lid, the first sleeve, the second sleeve of the temperature measuring port, and the second sleeve of the liquid level port is made of a corrosion-resistant metal composite plate.

[0015] In some embodiments, the corrosion-resistant metal composite plate is one of a titanium composite plate, a super austenitic stainless steel composite plate, and a Hastelloy composite plate.

[0016] In some embodiments, the reaction kettle for sludge treatment further includes an exhaust valve. The kettle lid is provided with an exhaust port communicating with the reaction chamber. The exhaust valve is connected to the exhaust port and is used to control the opening and closing of the exhaust port. The exhaust valve is electrically connected to the main control unit.

[0017] In some embodiments, the reaction kettle for sludge treatment further includes a rupture disk and a safety valve. The kettle lid is further provided with a relief port communicating with the reaction chamber. The rupture disk is installed at the relief port and is used to cover the relief port. The safety valve is installed at the relief port and jointly controls the opening and closing of the relief port with the rupture disk.

[0018] In some embodiments, the kettle body includes an inner cylinder and an outer cylinder. The inner cylinder is provided with the reaction chamber. The outer cylinder is sleeved on the inner cylinder. A heating chamber extending in the height direction is defined between the inner wall surface of the outer cylinder and the outer wall surface of the inner cylinder.

[0019] The reaction kettle for sludge treatment further includes an electric heater and a second temperature measuring thermocouple. The electric heater and the second temperature measuring thermocouple are both installed on the outer cylinder and are electrically connected to the main control unit. The heating end of the electric heater and the temperature measuring end of the second temperature measuring thermocouple both extend into the heating chamber.

[0020] In some embodiments, heat-conducting oil is provided in the heating chamber. The outer cylinder is provided with a medium inlet, a medium outlet, and a medium exhaust port communicating with the heating chamber. The medium exhaust port is located above the medium inlet and the medium outlet in the height direction. The heating end of the electric heater and the temperature measuring end of the second temperature measuring thermocouple are both below the liquid level of the heat-conducting oil.

[0021] In some embodiments, there are multiple electric heaters, and the multiple electric heaters are arranged at intervals along the circumference of the bottom of the outer cylinder.

[0022] In some embodiments, the medium inlet is located below the medium outlet in the height direction.

[0023] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0024] Figure 1 It is a front view structural schematic diagram of a reaction kettle for sludge treatment according to an embodiment of the present utility model.

[0025] Figure 2 It is a structural schematic diagram of the kettle cover in the reaction kettle for sludge treatment according to an embodiment of the present utility model.

[0026] Figure 3 It is a control relationship block diagram between the main control unit and each electrical component in the reaction kettle for sludge treatment according to an embodiment of the present utility model.

[0027] Figure 4 It is a connection structural schematic diagram of the first temperature measuring thermocouple and the kettle cover in the reaction kettle for sludge treatment according to an embodiment of the present utility model.

[0028] Figure 5 It is a layout structural schematic diagram of the electric heater at the bottom of the outer cylinder in the reaction kettle for sludge treatment according to an embodiment of the present utility model.

[0029] Reference numerals: 1, kettle body; 11, reaction chamber; 12, inner cylinder; 13, outer cylinder; 131, medium inlet; 132, medium outlet; 133, medium exhaust port; 14, heating chamber; 2, kettle cover; 21, feed port; 22, discharge port; 23, first sleeve; 24, second sleeve; 25, relief port; 3, stirrer; 4, main control unit; 5, monitoring unit; 51, first temperature measuring thermocouple; 52, pressure gauge; 53, liquid level gauge; 54, pressure transmitter; 6, exhaust valve; 7, electric heater; 8, second temperature measuring thermocouple. Detailed implementation manners

[0030] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0031] As Figures 1 to 3 shown, a reaction kettle for sludge treatment according to an embodiment of the present utility model includes a kettle body 1, a kettle cover 2, a stirrer 3, a main control unit 4, and a monitoring unit 5.

[0032] Among them, the kettle body 1 extends in the height direction and has a reaction chamber 11 with an opening at the top. The reaction chamber 11 is used to accommodate the reaction medium. The kettle cover 2 is connected to the top surface of the kettle body 1 and is used to cover the top surface of the reaction chamber 11. Corrosion-resistant layers are provided on the inner wall surface of the reaction chamber 11 and the bottom surface of the kettle cover 2 to overcome the disadvantage of insufficient corrosion resistance of the reaction kettle for sludge treatment in the related art.

[0033] Among them, the stirrer 3 is connected to the kettle cover 2, and the stirring end of the stirrer 3 extends into the reaction chamber 11 and is adapted to stir the reaction medium. The stirrer 3 may not be limited to including a motor and a stirring rod. The motor is installed on the top surface of the kettle cover 2 and is drivingly connected to the upper end of the stirring rod. The part of the stirring rod away from the motor passes through the kettle cover 2 and extends into the reaction chamber 11.

[0034] Among them, the main control unit 4 is electrically connected to the stirrer 3 and the monitoring unit 5. The monitoring unit 5 is used to monitor at least one parameter information of the temperature, pressure and liquid level in the reaction chamber 11. The main control unit 4 is adapted to perform interlock control on the temperature, pressure and liquid level of the reaction chamber 11.

[0035] According to a reaction kettle for sludge treatment according to an embodiment of the present invention, corrosion-resistant layers are provided on the inner wall surface of the reaction chamber 11 and the bottom surface of the kettle cover 2, so that in the high-temperature and high-pressure environment of the reaction chamber 11, when the stirrer 3 stirs the reaction medium (i.e., sludge) for hydrothermal carbonization treatment, the strong corrosiveness formed by the reaction medium during the reaction process will not corrode the kettle body 1 and the kettle cover 2. At the same time, the main control unit 4 can, according to the comparison of any one of the parameter information of the temperature, pressure and liquid level detected by the monitoring unit 5 with the corresponding set parameters, perform real-time interlock control on the heating situation and exhaust situation of the reaction chamber 11, as well as the injection and discharge situation of the reaction medium, so as to ensure the safe and effective operation of the reaction kettle. Therefore, compared with the related technology, the present invention has good corrosion resistance, can realize the treatment of sludge under high-temperature and high-pressure conditions, and has low operation risks.

[0036] Specifically, the height direction may be the up-and-down direction in the figure. The reaction chamber 11 may extend in the height direction. The reaction medium may not be limited to sludge. The kettle cover 2 may not be limited to being fixed to the top of the kettle body 1 by fastening bolts. The entire bottom surface of the kettle cover 2 or the part of the bottom surface used to cover the top surface of the reaction chamber 11 is provided with a corrosion-resistant layer. The monitoring unit 5 can monitor the temperature, pressure and liquid level in the reaction chamber 11 and feed back the monitoring information to the main control unit 4. The main control unit 4 performs interlock control on the temperature, pressure and liquid level in the reaction chamber 11 according to the comparison of the fed-back parameter information with the set parameters, so as to ensure that the corrosion rate of the reaction medium on the reaction kettle is within the design range.

[0037] In addition, the inner wall surface of the reaction chamber 11 and the kettle cover 2 may not be limited to being made of one of carbon steel, alloy steel, stainless steel composite plate and corrosion-resistant alloy. When the use temperature of the reaction kettle exceeds a certain temperature (such as exceeding 200 °C), the corrosive mechanism of the temperature on the reaction medium also needs to be considered. When the use environment of the reaction chamber 11 is a strong acid environment, the inner wall surface of the reaction chamber 11 and the kettle cover 2 can be made of a composite plate formed by low alloy steel and titanium material or other corrosion-resistant materials, so as to adopt a suitable material according to the different nature and components of the reaction medium (i.e., sludge), which can make the reaction kettle more durable and adaptable to various working conditions.

[0038] It should be noted that the use of the composite plate form greatly reduces the amount of corrosion-resistant metal, which can reduce costs and improve economic benefits. Among them, the composite plate is not limited to titanium composite plate, super austenitic stainless steel (i.e., 904L) composite plate and Hastelloy composite plate.

[0039] As Figure 2 shown, in some embodiments, the kettle cover 2 is further provided with a feed port 21 and a discharge port 22 communicating with the reaction chamber 11. Both the feed port 21 and the discharge port 22 are provided with a first sleeve 23 with openings at both ends. The lower end of the first sleeve 23 of the feed port 21 extends into the reaction chamber 11 and is located above the liquid level of the reaction medium. The lower end of the first sleeve 23 of the discharge port 22 extends into the reaction chamber 11 and is located below the lowest liquid level of the reaction medium, so as to facilitate the injection of the reaction medium into the reaction chamber 11 or the discharge from the reaction chamber 11.

[0040] Specifically, the first sleeve 23 can extend in the height direction. The upper end of the first sleeve 23 of the feed port 21 can communicate with the medium source. The upper end of the first sleeve 23 of the discharge port 22 can communicate with an external device (such as a pump suction device) to discharge the reaction medium.

[0041] In addition, the first sleeve 23 is not limited to a titanium sleeve, that is, a titanium layer is provided on the surface of the first sleeve 23 in contact with the reaction medium, so as to ensure that the corrosion of the reaction medium on the first sleeve 23 is within the controllable range, and also enable the high-viscosity reaction medium to smoothly enter and exit along the first sleeve 23, further optimizing the overall corrosion resistance of the reaction kettle.

[0042] As Figures 1 to 4 shown, in some embodiments, the kettle cover 2 is further provided with a temperature measuring port, a pressure measuring port and a liquid level port communicating with the reaction chamber 11. The temperature measuring port, the pressure measuring port and the liquid level port are all provided with a second sleeve 24 extending in the height direction and having openings at both ends.

[0043] The monitoring unit 5 includes a first temperature measuring thermocouple 51, a pressure gauge 52 and a liquid level gauge 53. The first temperature measuring thermocouple 51 is fitted in the second sleeve 24 of the temperature measuring port and is used to monitor the temperature of the reaction chamber 11. The pressure gauge 52 monitors the pressure of the reaction chamber 11 through the second sleeve 24 of the pressure measuring port. The liquid level gauge 53 is fitted in the second sleeve 24 of the liquid level port and is used to monitor the liquid level of the reaction chamber 11.

[0044] It can be understood that the second sleeve 24 facilitates the disassembly and assembly of the first temperature measuring thermocouple 51, the pressure gauge 52 and the liquid level gauge 53 on the kettle cover 2. Since the second sleeve 24 has an open structure at both ends, the inner cavity of the second sleeve 24 can be connected to the reaction chamber 11 to ensure that the internal and external pressures of the second sleeve 24 cooperating with the first temperature measuring thermocouple 51 are in a balanced state, preventing the problem that the second sleeve 24 is prone to rupture and deformation when there is an internal and external pressure difference.

[0045] Specifically, the second sleeves 24 of the temperature measurement ports and the second sleeves 24 of the liquid level ports are not limited to titanium sleeves. That is, titanium layers are provided on the surfaces of the second sleeves 24 that come into contact with the reaction medium, to protect the first temperature measurement thermocouple 51 and the liquid level gauge 53 from being corroded by non-condensable gases generated during the reaction of the reaction medium to a certain extent, ensuring the service life of the foregoing detection devices and the overall corrosion resistance of the reaction kettle. The pressure gauge 52 can be used to observe the pressure inside the reaction chamber 11 on-site. The liquid level gauge 53 is not limited to being a radar liquid level gauge 53.

[0046] It should be noted that the first sleeve 23 and the second sleeve 24 can also be made of other corrosion-resistant materials (such as Hastelloy).

[0047] As Figure 2 shown, in some embodiments, there are multiple temperature measurement ports, and there are multiple first temperature measurement thermocouples 51 corresponding to the temperature measurement ports one by one. Multiple first temperature measurement thermocouples 51 can be used simultaneously or adjusted for single use according to the reaction temperature, to avoid the problem that inaccurate temperature feedback caused by the adhesion of the reaction medium (i.e., sludge) affects the reaction effect, ensuring the detection accuracy. At the same time, based on the measurement of the temperatures at different points, the temperature feedback of the reaction kettle in the stirring and stationary states can be observed.

[0048] As Figure 2 and Figure 3 shown, in some embodiments, there are multiple pressure measurement ports, and a second sleeve 24 is provided in each pressure measurement port. The parts of the second sleeves 24 of all the pressure measurement ports that deviate from the pressure measurement ports are connected to the same connecting pipe (not shown in the figure). A pressure gauge 52 is installed on the connecting pipe. The second sleeves 24 of multiple pressure measurement ports adopt a structural form of sharing a single pipe orifice (i.e., the connecting pipe) to connect the pressure gauge 52, ensuring the accuracy of the pressure detection of the reaction kettle and simplifying the pressure measurement system.

[0049] As Figure 3 shown, in some embodiments, the monitoring unit 5 further includes a pressure transmitter 54. The pressure transmitter 54 is installed on the connecting pipe and electrically connected to the main control unit 4, to feedback the pressure information to the main control unit 4, facilitating the main control unit 4 to establish a chain with the temperature and liquid level controls of the reaction chamber 11 according to the pressure information. Moreover, the pressure measurement by the pressure transmitter 54 and the pressure measurement by the pressure gauge 52 also enable the reaction kettle to have two ways of obtaining pressure values simultaneously, with high flexibility in use.

[0050] As Figure 1 and Figure 3As shown in the figure, in some embodiments, the reaction kettle for sludge treatment further includes an exhaust valve 6. The kettle cover 2 is provided with an exhaust port communicating with the reaction chamber 11. The exhaust valve 6 is connected to the exhaust port and is used to control the opening and closing of the exhaust port. The exhaust valve 6 is electrically connected to the main control unit 4, so that the main control unit 4 can control the pressure in the reaction chamber 11. Also, when the reaction kettle performs a stirring reaction, the non-condensable gas generated in the reaction chamber 11 can be discharged through the exhaust valve 6, avoiding the occurrence of pressure buildup and overpressure reactions in the equipment.

[0051] As Figure 2 shown in the figure, in some embodiments, the reaction kettle for sludge treatment further includes a rupture disk and a safety valve. The kettle cover 2 is further provided with a relief port 25 communicating with the reaction chamber 11. The rupture disk is installed at the relief port 25 and is used to cover the relief port 25. The safety valve is installed at the relief port 25 and jointly controls the opening and closing of the relief port 25 with the rupture disk. When too much gas is generated in the reaction chamber 11 and the exhaust valve 6 fails to exhaust, the gas can be safely discharged through the safety valve after the rupture disk bursts, providing double protection for the safety of the reaction kettle during operation.

[0052] It should be noted that to further ensure the overall corrosion resistance of the reaction kettle under high temperature and high pressure conditions, the exhaust valve 6, the rupture disk, and the safety valve can also adopt a structure lined with titanium plates (which can be plate welding or surfacing with other corrosion-resistant Hastelloy materials, etc.) on the basis of the conventional structure, so as to prevent the reaction medium from corroding the aforementioned devices during the reaction process.

[0053] As Figure 1 and Figure 5 shown in the figure, in some embodiments, the kettle body 1 includes an inner cylinder 12 and an outer cylinder 13. The inner cylinder 12 is provided with a reaction chamber 11. The outer cylinder 13 is sleeved on the inner cylinder 12, and a heating chamber 14 extending in the height direction is defined between the inner wall surface of the outer cylinder 13 and the outer wall surface of the inner cylinder 12.

[0054] The reaction kettle for sludge treatment further includes an electric heater 7 and a second temperature measuring thermocouple 8. The electric heater 7 and the second temperature measuring thermocouple 8 are both installed on the outer cylinder 13 and are electrically connected to the main control unit 4. The heating end of the electric heater 7 and the temperature measuring end of the second temperature measuring thermocouple 8 both extend into the heating chamber 14.

[0055] Specifically, the inner cylinder 12 and the kettle cover 2 can be made of carbon steel + titanium composite plate material, and the outer cylinder 13 can be made of carbon steel material, so that the reaction kettle performs a stirring reaction under the set pressure and temperature range conditions, thereby ensuring that the corrosion rate of the reaction medium on the reaction kettle is within the design range.

[0056] In addition, there are multiple electric heaters 7, and the multiple electric heaters 7 are arranged at intervals in the circumferential direction of the bottom of the outer cylinder 13. An electric heating port is provided at the bottom of the outer cylinder 13, and the electric heater 7 is fitted and installed in the electric heating port. Specifically, the specific number of electric heating ports can be designed and calculated according to the heating area and temperature, and the structural strength of the bottom of the outer cylinder 13 needs to be ensured.

[0057] As Figure 1 shown, in some embodiments, heat-conducting oil is provided in the heating chamber 14. The outer cylinder 13 is provided with a medium inlet 131, a medium outlet 132, and a medium exhaust port 133 that communicate with the heating chamber 14. The medium exhaust port 133 is located above the medium inlet 131 and the medium outlet 132 in the height direction. The heating end of the electric heater 7 and the temperature-measuring end of the second temperature-measuring thermocouple 8 are both below the liquid level of the heat-conducting oil. Taking the number of electric heaters 7 as 1 - 9 as an example, the temperature of the heat-conducting oil is adjusted according to the data fed back by the second temperature-measuring thermocouple 8. When the temperature does not reach the set range, any 1 - 9 electric heaters 7 can be started to adjust and control the temperature rise to reach the required temperature. When the temperature is too high, the electric heater 7 is turned off to reduce the temperature of the heating chamber 14.

[0058] It can be understood that the electric heater 7 and the heat-conducting oil heating form two heating methods for the reaction medium in the reaction chamber 11, so that in practical applications, electric heating and heat-conducting oil heating can be selected simultaneously or separately according to requirements, thereby further improving the flexibility of use of this reaction kettle.

[0059] Specifically, the medium inlet 131 is located below the medium outlet 132 in the height direction.

[0060] It should be noted that the heat-conducting oil system and the electric heating system provided on the outer cylinder 13 ensure that the temperature of the heating chamber 14 is within a constant range, and the inner cylinder 12 is evenly heated under high-temperature conditions. At the same time, considering the above structural design of various parts of this reaction kettle, the overall reaction kettle can meet the requirements of high temperature, high pressure, and corrosion resistance required during the reaction process.

[0061] Now, in combination with the specific structure of this reaction kettle, its working process will be described. Specifically:

[0062] 1) Inject heat-conducting oil into the heating chamber 14 from the medium inlet 131, and fill the reaction chamber 11 of the inner cylinder 12 with water to a preset liquid level;

[0063] 2) Start the electric heater 7 to heat the heat-conducting oil through the main control unit 4. The heat-conducting oil automatically transfers the heat to the inner cylinder 12. The temperature in the reaction chamber 11 is detected by the first temperature-measuring thermocouple 51 on the kettle cover 2 until the temperature in the reaction chamber 11 reaches the set temperature (such as 200 °C), and it is ensured that the temperature in the reaction chamber 11 fluctuates within the set range;

[0064] 3) Inject the sludge slurry into the reaction chamber 11 through the feed inlet 21, and control the operation of each equipment accessory according to the flow rate, liquid level, and temperature of the sludge slurry. The liquid level gauge 53 feeds back the liquid level of the reaction medium in the reaction chamber 11 to facilitate controlling the flow rate of the reaction medium at the feed inlet 21. At the same time, set interlocks among the electric heater 7, exhaust valve 6, safety valve, first temperature measuring thermocouple 51, second temperature measuring thermocouple 8, pressure transmitter 54, and liquid level gauge 53, so that the main control unit 4 can perform interlock control on the temperature, pressure, and liquid level of the reaction chamber 11 until the sludge slurry in the reaction chamber 11 reaches the set liquid level;

[0065] 4) Start the agitator 3 to stir the sludge slurry in the reaction chamber 11 for reaction. During the high-speed stirring reaction of the sludge slurry, if non-condensable gas is generated or the pressure in the reaction chamber 11 changes during the reaction process, determine whether to start the exhaust valve 6 according to the generation and discharge amount of the non-condensable gas. Additionally, when the exhaust valve 6 is blocked and unable to exhaust gas, or the exhaust volume is too large to discharge the gas in the reaction chamber 11 in time, and the pressure in the reaction chamber 11 reaches the design pressure of the rupture disc and safety valve, the rupture disc will automatically burst and the safety valve will open to discharge the gas in the reaction chamber 11 to ensure operational safety;

[0066] 5) After the reaction ends, the electric heater 7 stops heating, the heat-conducting oil stops heating, the reactor is drained and vented. The reactor cools down and reduces pressure by itself. After draining the reaction medium and gas in the reaction chamber 11, inject water into the reaction chamber 11 again to displace and clean the sludge in the reaction chamber 11. After completing the cleaning operation of the reaction chamber 11, turn off the interlock program.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 therefore should not be construed as a limitation to the present invention.

[0068] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0069] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0070] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0071] In the present utility model, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0072] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A reactor for sludge treatment, characterized in that, include: A kettle body and a kettle cover, wherein the kettle body extends in the height direction and has a reaction chamber with an open top, the reaction chamber is used to accommodate a reaction medium, the kettle cover is connected to the top surface of the kettle body and is used to cover the top surface of the reaction chamber, and the inner wall surface of the reaction chamber and the bottom surface of the kettle cover are both provided with a corrosion-resistant layer; A stirrer, the stirrer is connected to the kettle cover, the stirring end of the stirrer extends to the reaction chamber and is suitable for stirring the reaction medium; as well as A main control unit and a monitoring unit, wherein the main control unit is electrically connected to the agitator and the monitoring unit, the monitoring unit is used to monitor at least one parameter information of the temperature, pressure and liquid level in the reaction chamber, and the main control unit is suitable for interlocking control of the temperature, pressure and liquid level of the reaction chamber.

2. The reactor for sludge treatment according to claim 1, characterized in that, The kettle cover is also provided with a feed port and a discharge port connected to the reaction chamber, and the feed port and the discharge port are both provided with a first sleeve with openings at both ends, the lower end of the first sleeve of the feed port extends to the reaction chamber and is located above the liquid level of the reaction medium, and the lower end of the first sleeve of the discharge port extends to the reaction chamber and is located below the lowest liquid level of the reaction medium.

3. The reactor for sludge treatment according to claim 2, wherein, The kettle cover is also provided with a temperature measuring port, a pressure measuring port and a liquid level port connected to the reaction chamber, and the temperature measuring port, the pressure measuring port and the liquid level port are all provided with a second sleeve extending along the height direction and having openings at both ends; The monitoring unit includes a first temperature measuring thermocouple, a pressure gauge and a liquid level gauge. The first temperature measuring thermocouple is matched with the second sleeve of the temperature measuring port and is used to monitor the temperature of the reaction chamber. The pressure gauge monitors the pressure of the reaction chamber through the second sleeve of the pressure measuring port. The liquid level gauge is matched with the second sleeve of the liquid level port and is used to monitor the liquid level of the reaction chamber.

4. The reactor for sludge treatment according to claim 3, wherein, There are multiple pressure measuring ports, each of which is provided with the second sleeve, and the parts of the second sleeves of all the pressure measuring ports away from the pressure measuring ports are connected to the same connecting pipe, and the pressure gauge is installed on the connecting pipe; And / or, the monitoring unit further includes a pressure transmitter, which is installed on the connecting pipe and electrically connected to the main control unit.

5. The reactor for sludge treatment according to claim 3, characterized in that, At least one of the kettle body, the kettle cover, the first sleeve, the second sleeve of the temperature measuring port, and the second sleeve of the liquid level port is made of a corrosion-resistant metal composite plate; And / or, the corrosion-resistant metal composite plate is one of a titanium composite plate, a super austenitic stainless steel composite plate and a Hastelloy composite plate.

6. The reactor for sludge treatment according to claim 1, wherein, It also includes an exhaust valve. The kettle cover is provided with an exhaust port connected to the reaction chamber. The exhaust valve is connected to the exhaust port and is used to control the on and off of the exhaust port. The exhaust valve is electrically connected to the main control unit.

7. The reactor for sludge treatment according to claim 6, characterized in that, It also includes a bursting disc and a safety valve. The kettle cover is also provided with a discharge port connected to the reaction chamber. The bursting disc is installed at the discharge port and is used to seal the discharge port. The safety valve is installed at the discharge port and controls the on and off of the discharge port together with the bursting disc.

8. The reactor for sludge treatment according to any one of claims 1-7, characterized in that, The kettle body includes an inner cylinder and an outer cylinder. The inner cylinder is provided with the reaction chamber. The outer cylinder is sleeved on the inner cylinder, and a heating chamber extending in the height direction is defined between the inner wall surface of the outer cylinder and the outer wall surface of the inner cylinder; The reaction kettle for sludge treatment further includes an electric heater and a second temperature measuring thermocouple. The electric heater and the second temperature measuring thermocouple are both installed on the outer cylinder and electrically connected to the main control unit. The heating end of the electric heater and the temperature measuring end of the second temperature measuring thermocouple both extend into the heating chamber.

9. The reactor for sludge treatment according to claim 8, wherein Heat-conducting oil is provided in the heating chamber. The outer cylinder is provided with a medium inlet, a medium outlet, and a medium exhaust port communicating with the heating chamber. The medium exhaust port is located above the medium inlet and the medium outlet in the height direction. The heating end of the electric heater and the temperature measuring end of the second temperature measuring thermocouple are both below the liquid level of the heat-conducting oil.

10. The reactor for sludge treatment according to claim 9, wherein, There are a plurality of electric heaters, and the plurality of electric heaters are arranged at intervals along the circumference of the bottom of the outer cylinder; And / or, the medium inlet is located below the medium outlet in the height direction.

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