Sludge hydrothermal carbonization treatment system
By designing a sludge hydrothermal carbonization treatment system including hair filters, grinders and adjustment tanks, the equipment blockage and wear caused by soft fiber substances and inorganic solid particles in the sludge is solved, and the continuous operation and efficient treatment of the system are achieved.
Patent Information
- Application Number
- CN202421278767.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-05
AI Technical Summary
In the sludge hydrothermal carbonization treatment system, soft fiber substances and medium and large volumes of inorganic solid particles are prone to wrap around and block high-pressure pumps and heat exchangers, resulting in serious wear of equipment and affecting the continuous operation of the system.
A sludge hydrothermal carbonization treatment system is designed, including a hair filter, a grinder, a regulating tank, a high-pressure pump, a heat exchanger, an oxidation device and a separation device. The system removes long fiber substances through a hair filter, crushes inorganic solid particles by a grinder, adjusts the water content of the sludge, and realizes continuous treatment of the sludge through a high-pressure pump and heat exchanger.
It effectively reduces the wear of soft fiber substances and inorganic solid particles on high-pressure pumps and heat exchangers, avoids blockage and equipment shutdown, and realizes the continuous operation and efficient treatment of the sludge water-heat carbonization treatment system.
Smart Images
Figure CN222613151U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of environmental protection, and in particular to a sludge hydrothermal carbonization treatment system. Background Art
[0002] The sludge generated during the treatment of urban domestic sewage has a complex composition and contains a large amount of organic and inorganic solid matter in huge quantities, making it difficult to handle and dispose of.
[0003] Hydrothermal drying technology has received more and more attention in recent years. This technology hydrolyzes the sticky organic matter in the sludge under a certain temperature and pressure, destroys the colloidal structure of the sludge, and thus improves the dewatering performance of the sludge. Since this process requires the sludge to be heated to a certain temperature and pressurized to a certain pressure, it is necessary to pump the sludge into a closed reactor and heat exchanger through equipment such as a high-pressure pump.
[0004] In actual projects, municipal sludge contains not only inorganic matter, but also a large amount of soft fiber matter such as hair and household impurities. When the sludge is pumped into the reactor, especially the heat exchanger, the soft fiber matter is easy to entangle and clog the pump rod of the high-pressure pump, or clog in the small-diameter pipe of the heat exchanger due to continuous operation. At the same time, large inorganic impurities will also seriously wear the stator and rotor of the high-pressure pump, seriously affecting the normal operation of subsequent hydrothermal equipment, which must be shut down for cleaning, which cannot meet the actual needs of the project. Utility Model Content
[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model proposes a sludge hydrothermal carbonization treatment system.
[0006] The sludge hydrothermal carbonization treatment system according to the utility model comprises: a hair filter, the hair filter having a first sludge inlet and a first sludge outlet; a grinder, the grinder comprising a trough and a grinding disc, the trough having a discharge chamber and a second sludge outlet connected to the discharge chamber, the grinding disc being arranged in the discharge chamber, the grinding disc having a second sludge inlet, the second sludge inlet being connected to the first sludge outlet; a regulating tank, the regulating tank having a regulating chamber and a third sludge inlet, a water inlet, a carbonization aid inlet and a third sludge outlet connected to the regulating chamber, the regulating chamber being provided with a stirrer, the third sludge inlet being connected to the The second sludge outlet is connected; a high-pressure pump, the high-pressure pump has a fourth sludge inlet and a fourth sludge outlet, the fourth sludge inlet is connected to the third sludge outlet; a heat exchanger, the heat exchanger has a low-temperature sludge inlet and a high-temperature sludge outlet, the low-temperature sludge inlet is connected to the fourth sludge outlet; an oxidizing device, the oxidizing device has an oxidation chamber and a high-temperature sludge inlet and an oxidizing liquid outlet connected to the oxidation chamber, the high-temperature sludge inlet is connected to the high-temperature sludge outlet; and a separating device, the separating device has an oxidizing liquid inlet, a first tail gas outlet and a first carbon slurry outlet, the oxidizing liquid inlet is connected to the oxidizing liquid outlet.
[0007] The sludge hydrothermal carbonization treatment system according to the utility model has the advantages of long continuous operation time and large sludge treatment capacity.
[0008] Optionally, the grinding disc includes: a lower grinding disc, which is arranged in the discharge chamber, and the second sludge outlet is located on the outside of the lower grinding disc; an upper grinding disc, which is rotatably arranged on the upper surface of the lower grinding disc relative to the lower grinding disc, the lower surface of the upper grinding disc cooperates with the upper surface of the lower grinding disc, and an abrasive cavity is provided between the lower surface of the upper grinding disc and the upper surface of the lower grinding disc, wherein one of the upper grinding disc and the lower grinding disc is provided with a feed channel, one end of the feed channel is connected to the abrasive cavity, and the other end of the feed channel constitutes the second sludge inlet; and a motor, which is connected to one of the lower grinding disc and the upper grinding disc so as to drive the one of the lower grinding disc and the upper grinding disc to rotate.
[0009] Optionally, the lower grinding disc has a center hole, and the grinding disc also includes: a transmission member, which is connected to the motor, and a part of the transmission member fits in the center hole and is connected to the lower grinding disc; and a pressing member, the upper end of the pressing member is connected to the wall of the discharge chamber, and the lower end of the pressing member is connected to the upper grinding disc so that the pressing member can apply downward pressure to the upper grinding disc.
[0010] Optionally, the pressing member is a spring, and the spring is in a compressed state; or the pressing member is one of a pneumatic cylinder and a hydraulic cylinder, and a piston rod of the one of the pneumatic cylinder and the hydraulic cylinder is connected to the upper grinding disc.
[0011] Optionally, the grinding mill further includes a scraper, which is connected to one of the lower grinding disc and the upper grinding disc so that the scraper can rotate, the scraper is located in the discharge chamber and cooperates with the second sludge outlet in its rotation direction, the scraper is adjacent to the bottom wall of the discharge chamber, and the scraper is spaced a preset distance from the bottom wall of the discharge chamber.
[0012] Optionally, the lower surface of the upper grinding disc is provided with a plurality of first grooves spaced apart along its circumference, the plurality of first grooves are radially arranged, the inner end of each first groove is adjacent to the center of the upper grinding disc, the outer end of each first groove is adjacent to the circumference of the upper grinding disc and is open, wherein each first groove is arc-shaped, and an arc-shaped first grinding tooth is formed between two adjacent first grooves; and / or the upper surface of the lower grinding disc is provided with a plurality of second grooves spaced apart along its circumference, the plurality of second grooves are radially arranged, the inner end of each second groove is adjacent to the center of the lower grinding disc, the outer end of each second groove is adjacent to the circumference of the lower grinding disc and is open, wherein each second groove is arc-shaped, and an arc-shaped second grinding tooth is formed between two adjacent second grooves.
[0013] Optionally, the sludge hydrothermal carbonization treatment system further includes: a preheater, the preheater including a heating chamber and a cooling chamber, the heating chamber and the cooling chamber cooperate to be able to exchange heat with the cooling chamber, the preheater also includes a preheating sludge inlet, a preheating sludge outlet, a tail gas inlet and a second tail gas outlet, each of the preheating sludge inlet and the preheating sludge outlet is connected to the heating chamber, and each of the tail gas inlet and the second tail gas outlet is connected to the cooling chamber, wherein the preheating sludge inlet is connected to the third sludge outlet, the preheating sludge outlet is connected to the fourth sludge inlet, and the tail gas inlet is connected to the first tail gas outlet; and / or an air compressor, the outlet of the air compressor is connected to the oxidation chamber.
[0014] Optionally, the separation device includes: a first gas-liquid separator, the first gas-liquid separator having a second carbon slurry outlet, the oxidizing liquid inlet and the first exhaust gas outlet; and a second gas-liquid separator, the second gas-liquid separator having a first carbon slurry inlet, a third exhaust gas outlet and the first carbon slurry outlet, and the first carbon slurry inlet is connected to the second carbon slurry outlet.
[0015] Optionally, the heat exchanger includes: a plurality of first heat exchangers, the plurality of first heat exchangers are connected in sequence, each of the first heat exchangers has a first shell side and a first tube side, the inlet of the first tube side of the first first heat exchanger constitutes the low-temperature sludge inlet, the inlet of the first shell side of the last first heat exchanger is connected to the second carbon slurry outlet, and the outlet of the first shell side of the first first heat exchanger is connected to the first carbon slurry inlet; and a second heat exchanger, the second heat exchanger has a second shell side and a second tube side, the inlet of the second tube side constitutes the heat transfer oil inlet, the inlet of the second shell side is connected to the outlet of the first tube side of the last first heat exchanger, and the outlet of the second shell side constitutes the high-temperature sludge outlet.
[0016] Optionally, the sludge hydrothermal carbonization treatment system further includes: a plate and frame filter press, the plate and frame filter press having a second carbon slurry inlet and a filtrate outlet, the second carbon slurry inlet being connected to the first carbon slurry outlet; and a filtrate tank, the filtrate inlet of the filtrate tank being connected to the filtrate outlet of the plate and frame filter press. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of a grinder in a sludge hydrothermal carbonization treatment system according to an embodiment of the utility model.
[0018] Figure 2 It is a schematic diagram of a sludge hydrothermal carbonization treatment system according to an embodiment of the utility model. DETAILED DESCRIPTION
[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.
[0020] The following describes the sludge hydrothermal carbonization treatment system 100 according to an embodiment of the present utility model with reference to the accompanying drawings. Figure 1 and Figure 2 As shown, the sludge hydrothermal carbonization treatment system 100 according to the embodiment of the utility model includes a hair filter 21, a grinder 1, a regulating tank 22, a high-pressure pump 3, a heat exchanger 4, an oxidation device 5 and a separation device.
[0021] The hair filter 21 has a first sludge inlet and a first sludge outlet. The grinder 1 includes a trough 11 and a grinding disc 12. The trough 11 has a discharge chamber 111 and a second sludge outlet connected to the discharge chamber 111. The grinding disc 12 is arranged in the discharge chamber 111. The grinding disc 12 has a second sludge inlet, which is connected to the first sludge outlet. The regulating tank 22 has a regulating chamber and a third sludge inlet, a water inlet, a carbonization aid inlet and a third sludge outlet connected to the regulating chamber. A stirrer is arranged in the regulating chamber, and the third sludge inlet is connected to the second sludge outlet.
[0022] The high-pressure pump 3 has a fourth sludge inlet and a fourth sludge outlet, and the fourth sludge inlet is connected to the third sludge outlet. The heat exchanger 4 has a low-temperature sludge inlet and a high-temperature sludge outlet, and the low-temperature sludge inlet is connected to the fourth sludge outlet. The oxidizing device 5 has an oxidation chamber and a high-temperature sludge inlet and an oxidation liquid outlet connected to the oxidation chamber, and the high-temperature sludge inlet is connected to the high-temperature sludge outlet. The separation device has an oxidation liquid inlet, a first tail gas outlet and a first carbon slurry outlet, and the oxidation liquid inlet is connected to the oxidation liquid outlet.
[0023] The wet sludge first passes through the hair filter 21, so that the hair filter 21 can be used to remove the longer soft fiber materials (such as hair, etc.) contained in the wet sludge, effectively preventing the longer soft fiber materials from being entangled and blocked on the pump rod of the high-pressure pump 3, and blocked in the small-diameter pipe of the heat exchanger 4. Subsequently, the wet sludge enters the grinding disc 12, which can crush the medium and large-volume inorganic solid particles in the wet sludge, so as to prevent the medium and large-volume inorganic solid particles from wearing the high-pressure pump 3. At the same time, the grinding disc 12 can also crush the soft fiber materials that are not removed by the hair filter 21.
[0024] The wet sludge after grinding enters the regulating tank 22. Water is added to the regulating tank 22 through the water inlet to configure the wet sludge into a slurry with a certain water content. Carbonization aids such as catalysts are added to the sludge through the carbonization aid inlet, and the agitator stirs the sludge. The high-pressure pump 3 continuously pumps the sludge in the regulating tank 22 into the heat exchanger 4 to ensure that the sludge with poor fluidity continuously and stably enters the heat exchanger 4. The sludge is heated to high-temperature sludge in the heat exchanger 4.
[0025] The high-temperature mud completes the liquefaction, wall breaking, decomposition, carbonization, and polymerization processes in the oxidation device 5, converting the bound water into free water and releasing it, thereby changing the physical and chemical properties of the mud and greatly improving the dehydration performance. After the above process, the high-temperature mud is converted into an oxidation liquid. The oxidation liquid enters the separation device for gas-liquid separation to obtain non-condensable carbonized tail gas and high-temperature carbonized slurry.
[0026] According to the embodiment of the utility model, the sludge hydrothermal carbonization treatment system 100 can effectively reduce the wear, entanglement and blockage of the high-pressure pump 3 by the soft fibrous materials and medium and large-volume inorganic solid particles in the sludge, as well as the blockage of the heat exchanger 4 by the soft fibrous materials, thereby enabling the sludge hydrothermal carbonization treatment system 100 to operate continuously.
[0027] Therefore, the sludge hydrothermal carbonization treatment system 100 according to the embodiment of the utility model has the advantages of long continuous operation time and large sludge treatment capacity.
[0028] like Figure 1 and Figure 2 As shown, the sludge hydrothermal carbonization treatment system 100 according to the embodiment of the utility model includes a hair filter 21, a grinder 1, a regulating tank 22, a high-pressure pump 3, a heat exchanger 4, an oxidation device 5 and a separation device.
[0029] The grinding mill 1 comprises a trough 11 and a grinding disc 12, wherein the trough 11 has a discharge chamber 111 and a second sludge outlet communicated with the discharge chamber 111. The upper end of the discharge chamber 111 is open so that the lower grinding disc 121 and the upper grinding disc 122 can be placed in the discharge chamber 111 more conveniently. The second sludge outlet can be arranged on the bottom wall surface 112 of the discharge chamber 111, or the second sludge outlet can be arranged at the bottom of the side wall surface 113 of the discharge chamber 111. The second sludge outlet can also be arranged at the corner of the bottom wall surface 112 and the side wall surface 113 of the discharge chamber 111, that is, a part of the second sludge outlet is arranged on the bottom wall surface 112 of the discharge chamber 111, and the rest of the second sludge outlet is arranged on the side wall surface 113 of the discharge chamber 111.
[0030] The grinding disc 12 is arranged in the discharge chamber 111, and the grinding disc includes a lower grinding disc 121, an upper grinding disc 122 and a motor 13. The lower grinding disc 121 is arranged in the discharge chamber 111, and the lower grinding disc 121 is supported on the bottom wall surface 112 of the material trough 11. The upper grinding disc 122 is rotatably arranged on the upper surface of the lower grinding disc 121 relative to the lower grinding disc 121. Optionally, at least a part of the upper grinding disc 122 is located in the discharge chamber 111. The second sludge outlet is located on the outer side of the lower grinding disc 121, and the second sludge outlet is also located on the outer side of the upper grinding disc 122, so that the ground wet sludge can be discharged through the second sludge outlet.
[0031] The lower surface of the upper grinding disc 122 cooperates with the upper surface of the lower grinding disc 121, and an abrasive cavity is provided between the lower surface of the upper grinding disc 122 and the upper surface of the lower grinding disc 121. One of the upper grinding disc 122 and the lower grinding disc 121 is provided with a feed channel 123, one end of the feed channel 123 is connected to the abrasive cavity, and the other end of the feed channel 123 constitutes a second sludge inlet. Figure 1 As shown, the upper grinding disc 122 is provided with a feed channel 123, and the feed channel 123 extends in the up-down direction and passes through the upper grinding disc 122. Figure 1 As shown by arrow A in FIG.
[0032] The motor 13 is connected to one of the lower grinding disc 121 and the upper grinding disc 122 so as to drive the one of the lower grinding disc 121 and the upper grinding disc 122 to rotate.
[0033] Optionally, the lower grinding disc 121 has a center hole. The grinding disc 12 further includes a transmission member 15 and a pressing member (not shown in the figure). The transmission member 15 is connected to the motor 13, and a part of the transmission member 15 is fitted in the center hole and connected to the lower grinding disc 121, so that the motor 13 drives the lower grinding disc 121 to rotate through the transmission member 15. The upper end of the pressing member is connected to the wall surface of the discharge chamber 111, and the lower end of the pressing member is connected to the upper grinding disc 122 so that the pressing member can apply downward pressure to the upper grinding disc 122.
[0034] By connecting the motor 13 to the lower grinding disc 121, it is not necessary to set a center hole on the upper grinding disc 122 to reduce the processing difficulty of the upper grinding disc 122, and the grinding shaft matched with the upper grinding disc 122 can be omitted to simplify the structure of the driving member and the grinding machine 1. By setting the pressing member, the force applied by the upper grinding disc 122 to the lower grinding disc 121 can be increased to better grind the wet sludge, thereby further reducing the volume (particle size) of inorganic solid particles and the length of soft fiber materials in the wet sludge.
[0035] Optionally, the transmission member 15 includes a pulley, a worm wheel and a worm. The pulley and the motor 13 are connected by a belt, so that the motor 13 drives the pulley to rotate through the belt. The worm wheel is arranged on the pulley, so that the pulley drives the worm wheel to rotate. The worm is meshed with the worm wheel, so that the worm wheel drives the worm to rotate. At least a portion of the worm is fitted in the center hole of the lower grinding disc 121, and the at least a portion of the worm is connected to the lower grinding disc 121, so that the motor 13 drives the lower grinding disc 121 to rotate through the transmission member 15.
[0036] The pressing member can be a spring, which is in a compressed state. The pressing member can also be one of a cylinder and a hydraulic cylinder, and the piston rod of the one of the cylinder and the hydraulic cylinder is connected to the upper grinding disc 122.
[0037] The lower surface of the upper grinding disc 122 is provided with a plurality of first grooves spaced apart along the circumference thereof, and the plurality of first grooves are arranged radially. The inner end of each first groove is adjacent to the center of the upper grinding disc 122, and the outer end of each first groove is adjacent to the circumferential surface 1221 of the upper grinding disc 122 and is open. Each first groove is arc-shaped, and an arc-shaped first grinding tooth is formed between two adjacent first grooves.
[0038] By forming the first grinding teeth on the lower surface of the upper grinding disc 122, the wet sludge can be better ground, thereby further reducing the volume (particle size) of inorganic solid particles and the length of soft fiber materials in the wet sludge. In addition, by providing the arc-shaped first groove on the lower surface of the upper grinding disc 122, and the outer end of the first groove is adjacent to the peripheral surface 1221 of the upper grinding disc 122 and is open, the first groove can be used to guide the wet sludge, so that the wet sludge moves outward more smoothly along the first groove, thereby improving the processing efficiency of the grinding machine 1.
[0039] The upper surface of the lower grinding disc 121 is provided with a plurality of second grooves spaced apart along the circumference thereof, and the plurality of second grooves are arranged radially. The inner end of each second groove is adjacent to the center of the lower grinding disc 121, and the outer end of each second groove is adjacent to the circumferential surface 1211 of the lower grinding disc 121 and is open. Each second groove is arc-shaped, and an arc-shaped second grinding tooth is formed between two adjacent second grooves.
[0040] By forming the second grinding teeth on the upper surface of the lower grinding disc 121, the wet sludge can be better ground, thereby further reducing the volume (particle size) of inorganic solid particles and the length of soft fiber materials in the wet sludge. In addition, by providing the arc-shaped second groove on the upper surface of the lower grinding disc 121, and the outer end of the second groove is adjacent to the peripheral surface 1211 of the lower grinding disc 121 and is open, the second groove can be used to guide the wet sludge, so that the wet sludge moves outward more smoothly along the second groove, thereby improving the processing efficiency of the grinding machine 1.
[0041] like Figure 1 As shown, the grinding mill 1 further includes a scraper 14, and the scraper 14 is connected to one of the lower grinding disc 121 and the upper grinding disc 122 so that the scraper 14 rotates. That is, when the motor 13 is connected to the upper grinding disc 122 to drive the upper grinding disc 122 to rotate, the scraper 14 is connected to the upper grinding disc 122, and when the motor 13 is connected to the lower grinding disc 121 to drive the lower grinding disc 121 to rotate, the scraper 14 is connected to the lower grinding disc 121.
[0042] The scraper 14 is located in the discharge chamber 111, and the scraper 14 cooperates with the second sludge outlet of the trough 11 in its rotation direction. Optionally, the scraper 14 is opposite to the second sludge outlet of the trough 11 in its rotation direction. The rotation direction of the scraper 14 is consistent with the rotation direction of the upper grinding disc 122 (lower grinding disc 121), and the rotation direction of the scraper 14 is consistent with the circumferential direction of the upper grinding disc 122 (lower grinding disc 121).
[0043] The scraper 14 is adjacent to the bottom wall 112 of the discharge chamber 111, and the scraper 14 is spaced a preset distance from the bottom wall 112 of the discharge chamber 111. Thus, the scraper 14 can scrape the wet sludge (wet sludge after grinding) in the discharge chamber 111, and scrape the wet sludge to the second sludge outlet of the trough 11, so that the wet sludge is discharged from the trough 11 as soon as possible, thereby further improving the processing efficiency of the grinding machine 1.
[0044] Optionally, the inner end 141 of the scraper 14 is adjacent to the circumferential surface 1211 of the lower grinding disc 121, and the outer end 142 of the scraper 14 is adjacent to the side wall surface 113 of the discharge chamber 111. In this way, the scraper 14 can scrape more wet sludge, thereby further improving the processing efficiency of the grinding mill 1.
[0045] The third sludge inlet of the adjustment tank 22 is connected to the second sludge outlet of the grinder 1, so that the wet sludge after grinding enters the adjustment tank 22. In the adjustment tank 22, the wet sludge is evenly mixed with water and carbonization aids such as catalysts to obtain mud with a certain water content.
[0046] like Figure 2 As shown, the sludge hydrothermal carbonization treatment system 100 further includes a preheater 7, which includes a heating chamber and a cooling chamber, and the heating chamber and the cooling chamber cooperate to be able to exchange heat with the cooling chamber. The preheater 7 also includes a preheating sludge inlet, a preheating sludge outlet, a tail gas inlet and a second tail gas outlet. Each of the preheating sludge inlet and the preheating sludge outlet is connected to the heating chamber, and each of the tail gas inlet and the second tail gas outlet is connected to the cooling chamber. Among them, the preheating sludge inlet is connected to the third sludge outlet, the preheating sludge outlet is connected to the fourth sludge inlet, and the tail gas inlet is connected to the first tail gas outlet.
[0047] The sludge in the regulating tank 22 enters the heating chamber through the third sludge outlet and the preheating sludge inlet in turn. The sludge in the heating chamber absorbs the heat of the non-condensable carbonized tail gas in the cooling chamber to increase the temperature of the sludge and reduce the temperature of the non-condensable carbonized tail gas. In this way, the residual heat energy in the sludge hydrothermal carbonization treatment system 100 can be fully utilized, thereby achieving energy-saving and high efficiency in the operation of the sludge hydrothermal carbonization treatment system 100 and improving energy utilization.
[0048] like Figure 2 As shown, the separation device includes a first gas-liquid separator 61 and a second gas-liquid separator 62. The first gas-liquid separator 61 has a second carbon slurry outlet, an oxidizing liquid inlet and a first tail gas outlet, and the oxidizing liquid inlet of the first gas-liquid separator 61 is connected to the oxidizing liquid outlet of the oxidizing device 5.
[0049] The high-temperature mud leaving the heat exchanger enters the oxidizing device 5, where it is converted into an oxidizing liquid. The oxidizing liquid leaving the oxidizing device 5 enters the first gas-liquid separator 61. The high-temperature oxidizing liquid is subjected to gas-liquid separation in the first gas-liquid separator 61. For example, the flow rate of the high-temperature oxidizing liquid is slowed down by changing the rising flow rate, so that when the gas gathers at the top of the first gas-liquid separator 61, the non-condensable carbonized tail gas is released through the first tail gas outlet. After releasing part of the gas, the high-temperature oxidizing liquid becomes a high-temperature carbon slurry (carbonized slurry).
[0050] The second gas-liquid separator 62 has a first carbon slurry inlet, a third tail gas outlet and the first carbon slurry outlet, the first carbon slurry inlet is connected to the second carbon slurry outlet, and the third tail gas outlet is connected to the tail gas inlet. The high-temperature carbon slurry leaving the first gas-liquid separator 61 enters the second gas-liquid separator 62, and further undergoes gas-liquid separation in the second gas-liquid separator 62. The non-condensable carbonized tail gas discharged from the first gas-liquid separator 61 and the second gas-liquid separator 62 enters the preheater 7 to preheat the slurry.
[0051] The heat exchanger 4 includes a second heat exchanger and a plurality of first heat exchangers. Each first heat exchanger has a first shell side and a first tube side, and the inlet of the first tube side of the first first heat exchanger constitutes the low-temperature sludge inlet. The plurality of first heat exchangers are connected in sequence. In other words, the outlet of the first tube side of the first first heat exchanger is connected to the inlet of the first tube side of the second first heat exchanger, the outlet of the first shell side of the last first heat exchanger is connected to the inlet of the first shell side of the second to last first heat exchanger, and so on.
[0052] The inlet of the first shell side of the last first heat exchanger is connected to the outlet of the second carbon slurry, and the outlet of the first shell side of the first first heat exchanger is connected to the inlet of the first carbon slurry. The high-temperature carbon slurry leaving the first gas-liquid separator 61 passes through multiple first heat exchangers in sequence, so as to perform countercurrent heat exchange with the slurry through multiple first heat exchangers. The high-temperature carbon slurry after heat exchange enters the second gas-liquid separator 62. In this way, the residual heat energy in the sludge hydrothermal carbonization treatment system 100 can be fully utilized, thereby realizing energy-saving and high efficiency in the operation of the sludge hydrothermal carbonization treatment system 100 and improving energy utilization.
[0053] The hair filter 21 is used to remove the relatively long soft fiber materials in the wet sludge, and the grinding disc 12 is used to grind the soft fiber materials and medium and large inorganic solid particles in the wet sludge, thereby avoiding clogging of the first tube side of the first heat exchanger.
[0054] The second heat exchanger has a second shell side and a second tube side, the inlet of the second tube side constitutes the heat transfer oil inlet, the inlet of the second shell side is connected to the outlet of the first tube side of the last first heat exchanger, and the outlet of the second shell side constitutes the high-temperature sludge outlet, so that the sludge heated by the high-temperature carbon slurry enters the second shell side of the second heat exchanger. The heat transfer oil can be transported to the second tube side of the second heat exchanger through the heat supply compensation device 92, so that the heat transfer oil is used to further heat the sludge, thereby obtaining high-temperature sludge.
[0055] The high-temperature mud completes the processes of liquefaction, wall breaking, decomposition, carbonization, and polymerization in the oxidation device 5. After the above processes, the high-temperature mud is transformed into oxidation liquid. Figure 2 As shown, the sludge hydrothermal carbonization treatment system 100 further includes an air compressor 91, the outlet of the air compressor 91 is connected to the oxidation chamber of the oxidizer 5, so that the air compressor 91 is used to transport gas into the oxidation chamber of the oxidizer 5. In this way, the pressure of the oxidation chamber of the oxidizer 5 can be increased, so that the high-temperature sludge can be liquefied, broken, decomposed, carbonized, and polymerized under a certain pressure. Optionally, the liquefaction, wall breaking, decomposition, carbonization, and polymerization of the high-temperature sludge are carried out at a pressure of 2.5Mpa-5.0Mpa and a temperature of 180°C-250°C.
[0056] like Figure 2 As shown, the sludge hydrothermal carbonization treatment system 100 further includes a plate-frame filter press 81 and a filtrate tank 82. The plate-frame filter press 81 has a second carbon slurry inlet and a filtrate outlet, and the second carbon slurry inlet is connected to the first carbon slurry outlet. The filtrate inlet of the filtrate tank 82 is connected to the filtrate outlet of the plate-frame filter press 81. The carbon slurry leaving the second gas-liquid separator 62 enters the plate-frame filter press 81 to perform solid-liquid separation, and obtains semi-dried carbon cake and filtrate, and the filtrate enters the filtrate tank 82.
[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0060] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0061] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0062] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A sludge hydrothermal carbonization treatment system, characterized in that: include: a hair filter having a first sludge inlet and a first sludge outlet; A grinding mill, the grinding mill comprising a trough and a grinding disc, the trough having a discharge cavity and a second sludge outlet communicated with the discharge cavity, the grinding disc being arranged in the discharge cavity, the grinding disc having a second sludge inlet, and the second sludge inlet being communicated with the first sludge outlet; A regulating tank, the regulating tank having a regulating chamber and a third sludge inlet, a water inlet, a carbonization aid inlet and a third sludge outlet connected to the regulating chamber, a stirrer is provided in the regulating chamber, and the third sludge inlet is connected to the second sludge outlet; a high-pressure pump, the high-pressure pump having a fourth sludge inlet and a fourth sludge outlet, the fourth sludge inlet being connected to the third sludge outlet; a heat exchanger, the heat exchanger having a low-temperature sludge inlet and a high-temperature sludge outlet, the low-temperature sludge inlet being connected to the fourth sludge outlet; An oxidation device, the oxidation device comprising an oxidation chamber and a high-temperature sludge inlet and an oxidation liquid outlet communicated with the oxidation chamber, the high-temperature sludge inlet being communicated with the high-temperature sludge outlet; and The separation device comprises an oxidation liquid inlet, a first tail gas outlet and a first carbon slurry outlet, wherein the oxidation liquid inlet is connected to the oxidation liquid outlet.
2. The sludge hydrothermal carbonization treatment system according to claim 1, characterized in that: The grinding disc comprises: A lower grinding disc, wherein the lower grinding disc is arranged in the discharge cavity, and the second sludge outlet is located outside the lower grinding disc; an upper grinding disc, the upper grinding disc being rotatably arranged on the upper surface of the lower grinding disc relative to the lower grinding disc, the lower surface of the upper grinding disc being matched with the upper surface of the lower grinding disc, an abrasive cavity being provided between the lower surface of the upper grinding disc and the upper surface of the lower grinding disc, wherein one of the upper grinding disc and the lower grinding disc is provided with a feed channel, one end of the feed channel being communicated with the abrasive cavity, and the other end of the feed channel constituting the second sludge inlet; and A motor is connected to one of the lower grinding disc and the upper grinding disc so as to drive the one of the lower grinding disc and the upper grinding disc to rotate.
3. The sludge hydrothermal carbonization treatment system according to claim 2, characterized in that: The lower grinding disc has a central hole, and the grinding disc also includes: A transmission member, the transmission member is connected to the motor, a portion of the transmission member is fitted in the central hole and is connected to the lower grinding disc; and A pressing piece, the upper end of which is connected to the wall of the discharge cavity, and the lower end of which is connected to the upper grinding disc so that the pressing piece can apply downward pressure to the upper grinding disc.
4. The sludge hydrothermal carbonization treatment system according to claim 3, characterized in that: The pressed part is a spring, and the spring is in a compressed state; or The pressing member is one of an air cylinder and a hydraulic cylinder, and a piston rod of the one of the air cylinder and the hydraulic cylinder is connected to the upper grinding disc.
5. The sludge hydrothermal carbonization treatment system according to claim 2, characterized in that: The grinding mill further includes a scraper, which is connected to one of the lower grinding disc and the upper grinding disc so that the scraper can rotate. The scraper is located in the discharge chamber and cooperates with the second sludge outlet in its rotation direction. The scraper is adjacent to the bottom wall of the discharge chamber, and the scraper is spaced a preset distance from the bottom wall of the discharge chamber.
6. The sludge hydrothermal carbonization treatment system according to claim 2, characterized in that: The lower surface of the upper grinding disc is provided with a plurality of first grooves spaced apart along its circumference, the plurality of first grooves are radially arranged, the inner end of each first groove is adjacent to the center of the upper grinding disc, the outer end of each first groove is adjacent to the circumference of the upper grinding disc and is open, wherein each first groove is arc-shaped, and arc-shaped first grinding teeth are formed between two adjacent first grooves; and / or The upper surface of the lower grinding disc is provided with a plurality of second grooves spaced apart along its circumference, and the plurality of second grooves are radially arranged, the inner end of each second groove is adjacent to the center of the lower grinding disc, and the outer end of each second groove is adjacent to the circumference of the lower grinding disc and is open, wherein each second groove is arc-shaped, and an arc-shaped second grinding tooth is formed between two adjacent second grooves.
7. The sludge hydrothermal carbonization treatment system according to claim 1, characterized in that: Further including: A preheater, the preheater comprising a heating chamber and a cooling chamber, the heating chamber and the cooling chamber cooperate to be able to exchange heat with the cooling chamber, the preheater further comprising a preheating sludge inlet, a preheating sludge outlet, a tail gas inlet and a second tail gas outlet, each of the preheating sludge inlet and the preheating sludge outlet is connected to the heating chamber, each of the tail gas inlet and the second tail gas outlet is connected to the cooling chamber, wherein the preheating sludge inlet is connected to the third sludge outlet, the preheating sludge outlet is connected to the fourth sludge inlet, and the tail gas inlet is connected to the first tail gas outlet; and / or An air compressor, wherein the outlet of the air compressor is connected to the oxidation chamber.
8. The sludge hydrothermal carbonization treatment system according to claim 1, characterized in that: The separation device comprises: A first gas-liquid separator, the first gas-liquid separator having a second carbon slurry outlet, the oxidizing liquid inlet and the first tail gas outlet; and The second gas-liquid separator comprises a first carbon slurry inlet, a third tail gas outlet and the first carbon slurry outlet, wherein the first carbon slurry inlet is connected to the second carbon slurry outlet.
9. The sludge hydrothermal carbonization treatment system according to claim 8, characterized in that: The heat exchanger comprises: A plurality of first heat exchangers, wherein the plurality of first heat exchangers are connected in sequence, each of the first heat exchangers has a first shell side and a first tube side, the inlet of the first tube side of the first first heat exchanger constitutes the low-temperature sludge inlet, the inlet of the first shell side of the last first heat exchanger is connected to the second carbon slurry outlet, and the outlet of the first shell side of the first first heat exchanger is connected to the first carbon slurry inlet; and The second heat exchanger has a second shell side and a second tube side, the inlet of the second tube side constitutes the heat transfer oil inlet, the inlet of the second shell side is connected to the outlet of the first tube side of the last one of the first heat exchangers, and the outlet of the second shell side constitutes the high-temperature sludge outlet.
10. The sludge hydrothermal carbonization treatment system according to claim 1, characterized in that: Further including: A plate and frame filter press, wherein the plate and frame filter press has a second carbon slurry inlet and a filtrate outlet, wherein the second carbon slurry inlet is connected to the first carbon slurry outlet; and A filtrate tank, wherein the filtrate inlet of the filtrate tank is connected to the filtrate outlet of the plate and frame filter press.