Pretreatment device and pretreatment method

Abstract

This invention provides a pretreatment apparatus and method, relating to the field of pretreatment technology. The pretreatment apparatus includes a feeding tank, a drying mechanism, a conveying mechanism, and a discharging tank. The feeding tank is used to contain the material to be treated. The drying mechanism includes a main body, a stirring assembly, and a heating assembly. The stirring assembly is rotatably disposed within the main body, and the heating assembly is used to heat at least one of the main body and the stirring assembly. The conveying mechanism is disposed between the feeding tank and the drying mechanism and communicates with both the feeding tank and the main body, for conveying the material to be treated from the feeding tank into the main body. The discharging tank is communicated with the drying mechanism and is used to contain the material dried by the drying mechanism. The heating assembly increases the contact area with the material to be treated, and the material is heated while being stirred and mixed, improving the drying effect of the material.

Description

Technical Field

[0001] This invention generally relates to the field of pretreatment technology, and more specifically, to a pretreatment apparatus and a pretreatment method. Background Technology

[0002] In the fermentation process of long-chain dicarboxylic acids, granular char is generally used to adsorb the long-chain dicarboxylic acids and perform decolorization treatment. The remaining saturated granular char after decolorization is usually washed with water and then enters the regeneration system. However, because the saturated granular char entering the regeneration system has a high moisture content and the mixed moisture is acidic, it will accelerate the corrosion of the furnace wall of the regeneration furnace at high temperatures. In addition, the high moisture content of the saturated granular char entering the furnace will cause cold impact on the furnace, causing significant damage to the refractory bricks at the bottom of the carbon drop port, resulting in the carbon falling off. This shortens the service life of the regeneration system and increases the consumption of natural gas and CO2 emissions, failing to meet the requirements of energy conservation and environmental protection.

[0003] Therefore, existing activated carbon regeneration technologies need to be improved. Summary of the Invention

[0004] The present invention provides a pretreatment device and pretreatment method that improves drying effect and saves energy and reduces emissions.

[0005] According to a first aspect of the present invention, a pretreatment apparatus is provided, comprising:

[0006] Feed tank, used to hold materials to be processed;

[0007] A drying mechanism, comprising a main body, a stirring assembly, and a heating assembly, wherein the stirring assembly is rotatably disposed within the main body, and the heating assembly is used to heat at least one of the main body and the stirring assembly;

[0008] A conveying mechanism is disposed between the feed tank and the drying mechanism and communicates with the feed tank and the main body, for conveying the material to be processed in the feed tank to the main body;

[0009] The discharge tank is connected to the drying mechanism and is used to contain the material dried by the drying mechanism.

[0010] In some embodiments, the heating assembly includes a first heating pipe for introducing a heat exchange medium, the first heating pipe being disposed around the outer wall of the main body;

[0011] And / or, the heating assembly includes a first heating pipe, the main body includes an outer cylinder and an inner cylinder that are nested together, a cavity is provided between the outer cylinder and the inner cylinder, the stirring assembly is rotatably disposed in the inner cylinder, and the first heating pipe is connected to the cavity for introducing a heat exchange medium into the cavity.

[0012] In some embodiments, the stirring assembly includes a rotating shaft and a disc, the rotating shaft being rotatably disposed within the main body and passing through the disc, and the rotating shaft communicating with the disc;

[0013] The heating assembly includes a second heating pipe connected to the rotating shaft. The second heating pipe can deliver a heat exchange medium to the disk through the rotating shaft for drying the material to be processed.

[0014] In some embodiments, the heating assembly further includes:

[0015] A rotary joint is disposed between the rotating shaft and the second heating pipe and is connected to the rotating shaft and the second heating pipe.

[0016] In some embodiments, the stirring assembly further includes:

[0017] A lifting plate is positioned at the edge of the disc;

[0018] The thickness of the disk along the axial direction of the rotating shaft gradually decreases from the center to the edge.

[0019] In some embodiments, the stirring assembly further includes:

[0020] A feeder is disposed on the edge of the disc. The main body has an inlet and an outlet at both ends along its axial direction. The inlet is connected to the conveying mechanism, and the outlet is connected to the discharge tank. The feeder is disposed at an angle to the axial direction of the main body, so that the material to be processed in the main body can move from the inlet to the outlet.

[0021] In some embodiments, the conveying mechanism includes:

[0022] A separator, connected to the feed tank, is used for cleaning the material to be processed and for primary solid-liquid separation;

[0023] A conveying body, one end of which is connected to the bottom of the separator, and the other end of which is connected to the drying mechanism;

[0024] A spiral structure is rotatably mounted within the conveying body. The axial direction of the spiral structure is at an angle to the axial direction of the main body, allowing the material after solid-liquid separation by the separator to undergo secondary solid-liquid separation and be conveyed to the drying mechanism via the spiral structure.

[0025] In some implementations, it also includes:

[0026] A condenser pipe, which is connected to at least one of the main body and the stirring assembly, is used to transport the condensed heat exchange medium.

[0027] In some implementations, it also includes:

[0028] The circulation component is connected to the conveying mechanism, the condenser pipe and the feed tank, so that the heat exchange medium output from the conveying mechanism and the condenser pipe flows back to the conveying mechanism and the feed tank respectively through the circulation component.

[0029] In some implementations, the loop component includes:

[0030] The circulation tank is connected to the condensate pipeline;

[0031] The liquid outlet pipeline has one end connected to the circulation tank and the other end connected to the feed tank.

[0032] A liquid outlet branch pipe, one end of which is connected to the liquid outlet pipeline and the other end of which is connected to the conveying mechanism;

[0033] A circulating pump is used to transport the heat exchange medium in the circulating tank to the feed tank through the liquid outlet pipeline, and to the conveying mechanism through the liquid outlet branch pipe.

[0034] In some embodiments, the loop component further includes:

[0035] An overflow pipe is provided, with one end connected to the conveying mechanism and the other end connected to the circulation tank. The upper clear liquid overflowing from the conveying mechanism is transported to the circulation tank through the overflow pipe.

[0036] In some implementations, it also includes:

[0037] A circulation pipeline, one end of which is connected to the discharge tank and the other end of which is connected to the heating component, wherein the discharge tank supplies heat exchange medium to the heating component through the circulation pipeline.

[0038] According to a second aspect of the present invention, embodiments of the present invention also provide a preprocessing method for controlling the above-described preprocessing apparatus, the preprocessing method comprising the following steps:

[0039] The material to be processed is placed in the feed tank and transported to the drying unit by the conveying mechanism.

[0040] The material to be processed in the main body is stirred by the stirring component of the drying mechanism, heated and dried by the heating component, and then conveyed to the discharge tank.

[0041] In some embodiments, the ratio of saturated particulate carbon to water in the material to be treated in the feed tank is 1 kg: (5-10) L.

[0042] In some embodiments, conveying the material to be processed using a conveying mechanism includes the following steps:

[0043] The separator of the conveying mechanism is used to clean the material to be processed and to perform solid-liquid separation on the material.

[0044] The material after solid-liquid separation in the separator is subjected to secondary solid-liquid separation using the spiral structure of the conveying mechanism, and then conveyed to the drying mechanism via the spiral structure.

[0045] In some embodiments, the rotational speed of the spiral structure is 5 to 15 r / min, preferably 5 to 10 r / min;

[0046] And / or, the moisture content of the material after secondary solid-liquid separation by the spiral structure is less than 65 wt%, preferably less than 62 wt%;

[0047] And / or, the moisture content of the material after drying by the drying unit is less than 25 wt%, preferably less than 22 wt%.

[0048] In some embodiments, when the material to be processed in the main body is stirred by the stirring component, the rotation speed of the stirring component is 5 to 15 r / min, preferably 10 to 15 r / min.

[0049] In some embodiments, drying the material to be processed by heating an assembly includes the following steps:

[0050] The first heating pipe of the heating assembly is arranged around the outer wall of the main body and / or delivers the heat exchange medium into the cavity of the main body;

[0051] The heat exchange medium is delivered to the rotating shaft and disc of the stirring assembly via the second heating pipe of the heating assembly.

[0052] In some embodiments, the steam pressure of the heat exchange medium in the first heating pipe and / or the heat exchange medium in the second heating pipe is 0.25 to 0.55 MPa, preferably 0.40 to 0.55 MPa.

[0053] In some embodiments, when drying the material to be treated by heating it with a heating assembly, the following steps are also included:

[0054] The main body and / or the stirring assembly are heated by a heat exchange medium delivered by a heating component, and the condensed heat exchange medium is delivered to the circulation component through a condensation pipeline.

[0055] The heat exchange medium in the circulating tank of the circulating component is transported to the feed tank through the liquid outlet pipeline, and then to the separator of the conveying mechanism through the liquid outlet branch pipe.

[0056] In some embodiments, the heating and drying of the material to be treated using a heating assembly further includes the following steps:

[0057] The clear liquid overflowing from the separator in the conveying mechanism is transported to the circulation tank through the overflow pipeline.

[0058] One embodiment of the present invention has the following advantages or beneficial effects:

[0059] The pretreatment device provided in this embodiment of the invention uses a conveying mechanism to transport the material to be treated in the feed tank to the drying mechanism. The drying mechanism evaporates the moisture in the material to be treated, thereby achieving drying treatment. This effectively controls the moisture content of the material to be treated when it enters the subsequent regeneration system, realizing a pretreatment process before the regeneration of saturated granular carbon. This reduces the corrosion of the regeneration system by moisture and the damage caused by cold shock, extends the service life, reduces the energy consumption of the regeneration system, saves production costs, and is energy-saving and environmentally friendly.

[0060] When the conveying mechanism transports the material to be processed from the feed tank into the main body, the stirring component rotates relative to the main body to stir the material to be processed, thereby achieving full mixing of the material to be processed. The heating component heats at least one of the main body and the stirring component, increasing the contact area with the material to be processed. The material to be processed is heated while being stirred and mixed, thereby improving the drying effect of the material to be processed.

[0061] The pretreatment method provided in this embodiment involves conveying the material to be treated in the feed tank to the main body of the drying unit via a conveying mechanism. The material is heated and dried using a heating component, and stirred by a stirring component of the drying unit. This process ensures thorough mixing of the material, increases the contact area with the material, and achieves the effect of simultaneous stirring, mixing, and heating. This improves the drying effect of the material, effectively controls the moisture content of the material before it enters the subsequent regeneration system, and realizes a pretreatment process before the regeneration of saturated granular carbon. This reduces the corrosion of the regeneration system by moisture and the damage caused by cold shock, thus extending the service life. Attached Figure Description

[0062] To better understand the present invention, reference may be made to the embodiments shown in the following drawings. Components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the invention. Furthermore, related elements or components may have different arrangements as known in the art. Additionally, in the drawings, the same reference numerals denote the same or similar components in various figures. The above and other features and advantages of the present invention will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0063] in:

[0064] Figure 1 The diagram shown is a structural schematic of a pretreatment apparatus according to an embodiment of the present invention;

[0065] Figure 2 The diagram shown is a structural schematic of the stirring assembly in a pretreatment device according to an embodiment of the present invention;

[0066] Figure 3 The diagram shown is a flowchart of a preprocessing method according to an embodiment of the present invention.

[0067] The reference numerals in the attached figures are explained as follows:

[0068] 1. Feed tank; 2. Drying mechanism; 3. Conveying mechanism; 4. Discharge tank; 5. Condensation pipeline; 6. Circulation assembly; 7. Circulation pipeline;

[0069] 21. Main body; 22. Stirring assembly; 23. Heating assembly; 24. Rotary drive source;

[0070] 221. Rotary shaft; 222. Disc; 223. Lifting plate; 224. Feed component;

[0071] 231. First heating pipe; 232. Second heating pipe; 233. Rotary joint;

[0072] 31. Separator; 32. Conveying body; 33. Spiral structure;

[0073] 61. Circulation tank; 62. Liquid outlet pipeline; 63. Liquid outlet branch pipe; 64. Circulation pump; 65. Overflow pipeline. Detailed Implementation

[0074] The technical solutions of the exemplary embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The exemplary embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present invention.

[0075] In the description of this invention, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more; and the term "and / or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the / described" object or "an" object are also intended to indicate one of a possible plurality of such objects.

[0076] Unless otherwise specified or stated, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0077] Furthermore, in the description of this invention, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" described in the exemplary embodiments of this invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the exemplary embodiments of this invention. It should also be understood that, in the context of an element or feature being connected to another element (one or more) "upper," "lower," "inner," or "outer," it can be directly connected to the other element (one or more) "upper," "lower," "inner," or "outer," or indirectly connected to the other element (one or more) "upper," "lower," "inner," or "outer" through an intermediate element.

[0078] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0079] This embodiment provides a pretreatment device, such as Figure 1 As shown, the pretreatment device includes a feed tank 1, a drying mechanism 2, a conveying mechanism 3, and a discharge tank 4. The feed tank 1, also known as a saturated carbon tank, is used to contain the material to be treated, specifically an aqueous solution of saturated granular carbon. The conveying mechanism 3 is located between and communicates with the feed tank 1 and the drying mechanism 2, and is used to transport the material to be treated from the feed tank 1 to the drying mechanism 2 for solid-liquid separation. The drying mechanism 2 is used to dry the material to be treated. The discharge tank 4, also known as a regeneration furnace, is connected to the drying mechanism 2 and is used to contain the material dried by the drying mechanism 2.

[0080] The pretreatment device provided in this embodiment uses the conveying mechanism 3 to transport the material to be treated in the feed tank 1 to the drying mechanism 2 for solid-liquid separation. The drying mechanism 2 evaporates the moisture in the material to be treated, achieving drying treatment. This effectively controls the moisture content of the material when it enters the subsequent regeneration system, realizing pretreatment before regeneration of saturated granular carbon. This reduces the corrosion and cold shock damage to the regeneration system caused by moisture, extends the service life, reduces the energy consumption of the regeneration system, saves production costs, and is energy-saving and environmentally friendly.

[0081] For example, in traditional saturated granular carbon regeneration methods, without a pretreatment step, the high moisture content of the saturated granular carbon causes corrosion of the regeneration furnace lining and collapse of refractory bricks due to cold impact. Therefore, the regular maintenance interval for the regeneration furnace lining is 3-6 months, and the regular maintenance interval for the furnace wall is 1 year. However, by installing a pretreatment device, the moisture content of the material entering the regeneration furnace can be controlled to be below 25 wt%, thereby extending the regular maintenance interval for the furnace lining to 1-1.5 years and the regular maintenance interval for the furnace wall to 2-3 years. This extends the service life of the regeneration furnace (i.e., discharge tank 4), and reduces the average natural gas consumption from 74 m³ / h. 3 / h decreased to 64m 3 / h, reducing CO2 emissions, making it green and environmentally friendly, and saving production and operating costs.

[0082] In one embodiment, the top of the feed tank 1 may be provided with a carbon inlet and a water inlet. The carbon inlet is used to introduce granular carbon, and the water inlet is used to introduce water. It is understood that a first control valve may be provided in the carbon inlet, and a second control valve may be provided in the water inlet. By controlling the opening and closing of the first and second control valves and their opening degree, the ratio of medium-saturated granular carbon to water in the material to be processed can be adjusted.

[0083] The bottom of the feed tank 1 is a conical structure, with the small opening of the conical structure facing the conveying mechanism 3. The inner wall of the conical structure serves as a guide, facilitating the falling of the material to be processed in the feed tank 1 into the conveying mechanism 3.

[0084] In one embodiment, such as Figure 1 As shown, the conveying mechanism 3 includes a separator 31, which can also be called a water-washing solid-liquid separator. The separator 31 is connected to the feed tank 1 and is used for washing the material to be treated and performing primary solid-liquid separation. Specifically, when the material to be treated in the feed tank 1 is conveyed to the separator 31, the water in the separator 31 can wash the material to be treated, realizing the water washing process. Then, based on the sedimentation principle, the upper clear liquid of the material to be treated is located above the separator 31, and the solid of the material to be treated is deposited below the bottom of the separator 31, thereby realizing primary solid-liquid separation.

[0085] The conveying mechanism 3 also includes a conveying body 32 and a spiral structure 33, which can be referred to as a dewatering spiral conveyor. One end of the conveying body 32 is connected to the bottom of the separator 31, and the other end is connected to the drying mechanism 2. The spiral structure 33 is rotatably installed inside the conveying body 32. The axial direction of the spiral structure 33 is set at an angle to the axial direction of the body 21, so that the material that settles at the bottom of the separator 31 after the first solid-liquid separation by the separator 31 undergoes a second solid-liquid separation and is conveyed to the drying mechanism 2 through the spiral structure 33.

[0086] In this manner, as the spiral structure 33 rotates relative to the conveying body 32, it drives the material to be processed to move, thereby achieving the purpose of conveying the material. While the material rotates with the spiral structure 33, it undergoes secondary solid-liquid separation under centrifugal force, further reducing the moisture content. Simultaneously, because the axial direction of the spiral structure 33 is angled upwards from the axial direction of the main body 21, the liquid from the secondary solid-liquid separation falls under its own gravity into the separator 31 located at the bottom of the conveying body 32, facilitating subsequent washing and reuse of the separator 31.

[0087] In one embodiment, such as Figure 1 As shown, the drying mechanism 2 includes a main body 21, a stirring assembly 22 and a heating assembly 23. The stirring assembly 22 is rotatably disposed inside the main body 21, and the heating assembly 23 is used to heat at least one of the main body 21 and the stirring assembly 22.

[0088] For example, when the conveying mechanism 3 conveys the material to be processed in the feed tank 1 to the main body 21, the stirring component 22 rotates relative to the main body 21 to stir the material to be processed, thereby achieving full mixing of the material to be processed. At the same time, the heating component 23 heats at least one of the main body 21 and the stirring component 22, increasing the contact area with the material to be processed. The material to be processed is heated while being stirred and mixed, thereby improving the drying effect of the material to be processed.

[0089] Specifically, the main body 21 can be a cylindrical structure, with an inlet and an outlet at both ends along its axial direction. The inlet is connected to the conveying mechanism 3, and the outlet is connected to the discharge tank 4. The material to be processed enters the main body 21 through the inlet, and after being stirred by the stirring assembly 22 and heated and dried by the heating assembly 23, it is conveyed to the discharge tank 4 through the outlet. Since the inlet and outlet are located at opposite ends of the main body 21 along its axial direction, that is, material is fed into the main body 21 at one end and discharged at the other end, the feeding and discharging are carried out simultaneously, the production process is continuous, and the production efficiency is improved.

[0090] Specifically, such as Figures 1-2As shown, the stirring assembly 22 includes a rotating shaft 221 and a disc 222. The rotating shaft 221 is rotatably disposed inside the main body 21 and passes through the disc 222. The rotating shaft 221 drives the disc 222 to rotate for stirring and mixing the material to be processed.

[0091] The number of discs 222 can be multiple, and the multiple discs 222 are arranged along the axial direction of the rotating shaft 221 so that the discs 222 are distributed as much as possible in the entire internal space of the main body 21, thereby further improving the mixing effect of the material to be processed.

[0092] The thickness of the disc 222 along the axial direction of the rotating shaft 221 gradually decreases from the center to the edge. With this design, the end face of the disc 222 along the axial direction of the rotating shaft 221 is a gradually changing transition slope. The transition slope serves as a transition and also provides a certain guiding effect, which is beneficial for the mixing and conveying of the material to be processed.

[0093] For example, both the rotating shaft 221 and the disk 222 are hollow structures, and the hollow structure of the rotating shaft 221 and the disk 222 can provide a space for accommodating the heat exchange medium.

[0094] In one embodiment, the drying mechanism 2 further includes a rotary drive source 24, which may be a rotary motor. The output end of the rotary drive source 24 is connected to the rotating shaft 221. The rotary drive source 24 drives the rotating shaft 221 to rotate the disc 222 to achieve the effect of rotary stirring.

[0095] In one embodiment, such as Figures 1-2 As shown, the stirring assembly 22 also includes lifting plates 223, which are disposed on the edge of the disc 222. When the disc 222 drives the lifting plates 223 to rotate relative to the main body 21, the lifting plates 223 can lift the material to be processed, making the material to be processed more evenly dispersed and improving the uniformity of stirring and mixing. At the same time, since there is a heat exchange medium inside the disc 222, when the lifted material to be processed falls down, it contacts the outer surface of the disc 222. The material to be processed is heated again by the disc 222 after being heated by the cylinder wall of the main body 21, thereby improving the drying effect.

[0096] The number of lifting plates 223 is multiple, and the multiple lifting plates 223 are evenly arranged along the circumference of the disc 222 to further improve the uniformity of the dispersion of the material to be processed.

[0097] When the axial direction of the main body 21 is parallel to the horizontal plane, the drying mechanism 2 has a horizontal structure, which presents a problem of difficulty in moving the material to be processed from the inlet to the outlet. To solve this problem, the stirring assembly 22 also includes a feeder 224, which is disposed on the disc 222 at an angle to the axial direction of the main body 21, enabling the material to be processed within the main body 21 to move from the inlet to the outlet. The feeder 224 provides guiding force for the material to be processed, realizing the feeding, moving, and conveying process of the material.

[0098] It is understandable that there are multiple feeders 224, which are correspondingly arranged on multiple disks 222. The inclination direction of the multiple feeders 224 on the same disk 222 is consistent. In this arrangement, the multiple feeders 224 form a spiral-like arrangement. When the rotating shaft 221 drives the multiple disks 222 to rotate synchronously, the multiple feeders 224 approximately form a spiral line, which can reduce the resistance during the rotation process and achieve the feeding and conveying effect of the material to be processed.

[0099] In one embodiment, such as Figure 1 As shown, the heating component 23 is used to introduce a heat exchange medium into the main body 21 and / or the stirring component 22, thereby achieving heat exchange with the main body 21 and / or the stirring component 22. The heat exchange medium may be steam.

[0100] Specifically, the heating assembly 23 includes a first heating pipe 231, which is used to introduce a heat exchange medium and is wound around the outer wall of the main body 21. With this arrangement, the first heating pipe 231 is wrapped around the outside of the main body 21, and the heat exchange medium inside the first heating pipe 231 keeps the main body 21 warm, which is beneficial for the evaporation of moisture from the material to be processed inside the main body 21 and improves the drying effect of the material.

[0101] Specifically, the heating component 23 includes a first heating pipe 231, the main body 21 includes an outer cylinder and an inner cylinder that are nested together, a cavity is provided between the outer cylinder and the inner cylinder, the stirring component 22 is rotatably disposed in the inner cylinder, and the first heating pipe 231 is connected to the cavity for introducing heat exchange medium into the cavity.

[0102] Because the main body 21 has a double-layer structure of an outer cylinder and an inner cylinder, the cavity between the outer and inner cylinders serves as a sandwich layer for the heat exchange medium. The gaseous heat exchange medium is continuously introduced into the cavity through the first heating pipe 231. This gaseous medium quickly covers the entire periphery of the inner cylinder, facilitating the heating of the material to be processed inside. Simultaneously, the inner cylinder also acts as an insulator to some extent, preventing direct contact between the heat exchange medium and the material to be processed, which could increase the moisture content of the material. The outer cylinder provides insulation to some extent, reducing heat loss from the heat exchange medium and further improving the drying effect of the material.

[0103] In one embodiment, such as Figure 1 As shown, the heating assembly 23 includes a second heating pipe 232, which is connected to a rotating shaft 221. The rotating shaft 221 is connected to a disc 222, meaning that the inner cavity of the rotating shaft 221 and the inner cavity of the disc 222 are connected to form a conveying channel. The second heating pipe 232 can convey a heat exchange medium to the disc 222 through the rotating shaft 221 for drying the material to be processed.

[0104] For example, the second heating pipe 232 continuously supplies a gaseous heat exchange medium into the conveying channel between the rotating shaft 221 and the disc 222, which can evaporate most of the moisture in the material to be treated in a very short time. In this way, the material to be treated can be dried while the disc 222 is stirring it. During the stirring process, the disc 222 and the material to be treated can fully contact and mix, with a large contact area and a large heating surface, which improves the heating and drying effect and effectively controls the moisture content in the saturated granular char that subsequently enters the regeneration system.

[0105] In one embodiment, such as Figure 1 As shown, the heating assembly 23 also includes a rotary joint 233, which is disposed between the rotating shaft 221 and the second heating pipe 232 and communicates with the rotating shaft 221 and the second heating pipe 232. The rotary joint 233 is used to prevent the rotating shaft 221 from driving the second heating pipe 232 to rotate during the rotation process, which would cause entanglement.

[0106] In one embodiment, the heating assembly 23 further includes a condensing pipe 5, which is connected to at least one of the main body 21 and the stirring assembly 22, for conveying the condensed heat exchange medium.

[0107] When the heating component 23 introduces a gaseous heat exchange medium into the main body 21 and / or the stirring component 22, the heat exchange medium will condense when it encounters cold air while heating the material to be processed, forming a liquid heat exchange medium. The condensed heat exchange medium is output through the condensation pipe 5, which serves to discharge the liquid heat exchange medium.

[0108] For example, the outer cylinder of the main body 21 is provided with a first condensation port, the rotary joint 233 is provided with a second condensation port, and the condensation pipe 5 is connected to the first condensation port and / or the second condensation port to output the heat exchange medium condensed in the outer cylinder and the rotary joint 233.

[0109] In one embodiment, such as Figure 1 As shown, the pretreatment device also includes a circulation component 6, which is connected to the conveying mechanism 3, the condenser pipe 5 and the feed tank 1, so that the upper clear liquid overflowing from the separator 31 of the conveying mechanism 3 and the heat exchange medium output from the condenser pipe 5 are returned to the conveying mechanism 3 and the feed tank 1 respectively through the circulation component 6.

[0110] In this way, the overflow of the upper clear liquid from the conveying mechanism 3 and the condensed heat exchange medium output from the condensing pipe 5 are not directly discharged, but are returned to the conveying mechanism 3 and the feed tank 1 through the circulation component 6, so as to achieve recycling, energy saving and emission reduction, and reduce production costs.

[0111] Specifically, the circulation assembly 6 includes a circulation tank 61 and an outlet pipe 62. The circulation tank 61 is connected to the condensation pipe 5 and serves to contain and store the condensed heat exchange medium. One end of the outlet pipe 62 is connected to the circulation tank 61, and the other end is connected to the feed tank 1, so that the heat exchange medium in the circulation tank 61 is transported to the feed tank 1 through the outlet pipe 62 to provide water as a solvent for the material to be treated, reducing the need for additional water through external equipment and saving production costs.

[0112] Specifically, such as Figure 1 As shown, the circulation component 6 also includes an outlet branch pipe 63. One end of the outlet branch pipe 63 is connected to the outlet pipeline 62, and the other end is connected to the conveying mechanism 3. This allows the heat exchange medium in the circulation tank 61 to be transported to the separator 31 of the conveying mechanism 3 through the outlet pipeline 62 and the outlet branch pipe 63. This provides the separator 31 with the water required for washing the material to be treated. While ensuring the washing effect, this also reduces the need to add water through external equipment, thus saving production costs.

[0113] Specifically, such as Figure 1 As shown, the circulation assembly 6 also includes a circulation pump 64, which provides power for conveying the heat exchange medium from the circulation tank 61, so that the heat exchange medium in the circulation tank 61 is conveyed to the feed tank 1 through the liquid outlet pipe 62, and then conveyed to the conveying mechanism 3 through the liquid outlet branch pipe 63.

[0114] Specifically, the circulation component 6 also includes an overflow pipe 65, one end of which is connected to the separator 31 of the conveying mechanism 3, and the other end is connected to the circulation tank 61. The upper clear liquid overflowing from the conveying mechanism 3 is transported to the circulation tank 61 through the overflow pipe 65.

[0115] After the material to be treated is washed and settled by the separator 31, the upper layer of clear liquid is located above the separator 31, while the solids are deposited at the bottom of the separator 31, achieving solid-liquid separation in one step. As the liquid level of the material to be treated gradually increases to the preset level, the water in the separator 31 overflows into the circulation tank 61, realizing water recycling and avoiding water waste.

[0116] In one embodiment, such as Figure 1 As shown, the pretreatment device also includes a circulation pipeline 7, one end of which is connected to the discharge tank 4 and the other end is connected to the heating component 23. The discharge tank 4 delivers the heat exchange medium to the heating component 23 through the circulation pipeline 7.

[0117] With this configuration, the secondary steam generated by the waste heat of the discharge tank 4 can be used as a heat exchange medium and provide the required heat exchange medium for the heating component 23, realizing the reuse of waste heat, saving resources and protecting the environment, and reducing production costs.

[0118] This embodiment also provides a preprocessing method for controlling the aforementioned preprocessing apparatus, such as... Figure 3 As shown, the preprocessing method includes the following steps:

[0119] S1. Place the material to be processed in the feed tank 1 and use the conveying mechanism 3 to transport the material to be processed into the drying mechanism 2;

[0120] S2. The material to be processed in the main body 21 is stirred by the stirring component 22 of the drying mechanism 2, the material to be processed is heated and dried by the heating component 23, and the dried material is conveyed to the discharge tank 4.

[0121] The pretreatment method provided in this embodiment involves conveying the material to be treated in the feed tank 1 to the main body 21 of the drying unit 2 via the conveying mechanism 3. The heating component 23 heats and dries the material, while the stirring component 22 of the drying unit 2 stirs the material in the main body 21 to achieve thorough mixing and increase the contact area with the material. This achieves the effect of simultaneous stirring, mixing, and heating of the material, improving the drying effect and effectively controlling the moisture content of the material before it enters the subsequent regeneration system. This pretreatment before the regeneration of saturated granular carbon reduces the corrosion of the regeneration system by moisture and the damage caused by cold impact on the refractory bricks, thus extending the service life of the regeneration system.

[0122] The ratio of saturated granular carbon to water in the material to be processed in the feed tank 1 is 1kg:(5~10)L, for example 1kg:5L, 1kg:6L, 1kg:7L, 1kg:8L, 1kg:9L, 1kg:10L, etc.

[0123] In one embodiment, conveying the material to be processed using the conveying mechanism 3 includes the following steps:

[0124] The material to be processed is cleaned by the separator 31 of the conveying mechanism 3 and a solid-liquid separation is performed on the material to be processed.

[0125] Specifically, the separator 31 can clean the material to be treated to achieve a water washing process. The separator 31 also has a solid-liquid separation function. After the material to be treated settles in the separator 31, the upper clear liquid of the material to be treated is located above the separator 31, and the solid of the material to be treated is deposited below the bottom of the separator 31 to achieve solid-liquid separation.

[0126] In one embodiment, conveying the material to be processed using the conveying mechanism 3 includes the following steps:

[0127] The material after solid-liquid separation in separator 31 is subjected to secondary solid-liquid separation using the spiral structure 33 of conveying mechanism 3 and then conveyed to drying mechanism 2 via the spiral structure 33.

[0128] Specifically, the spiral structure 33 of the conveying mechanism 3 drives the material to be processed to move, thereby realizing the conveying of the material to be processed. During the conveying process, the material to be processed achieves secondary solid-liquid separation under centrifugal action, further reducing the moisture in the material to be processed. The liquid of the material to be processed after secondary solid-liquid separation slides down into the separator 31 located at the bottom of the conveying body 32 under its own gravity. The separator 31 plays the role of recycling and utilization.

[0129] In one embodiment, the rotational speed of the spiral structure 33 is 5 to 15 r / min, preferably 5 to 10 r / min. For example, the specific rotational speed can be 5 r / min, 6 r / min, 7 r / min, 8 r / min, 9 r / min, 10 r / min, 11 r / min, 12 r / min, 13 r / min, 14 r / min, 15 r / min, etc.

[0130] In one embodiment, the water content of the material after secondary solid-liquid separation by the spiral structure 33 is less than 65 wt%, preferably less than 62 wt%. For example, the water content can be 55 wt%, 56 wt%, 57 wt%, 58 wt%, 59 wt%, 60 wt%, 61 wt%, 62 wt%, 63 wt%, 64 wt%, 65 wt%, etc.

[0131] In one embodiment, the moisture content of the material dried by the drying unit 2 is less than 25 wt%, preferably less than 22 wt%. For example, the moisture content can be 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, etc.

[0132] In one embodiment, when the stirring component 22 is used to stir the material to be processed in the main body 21, the rotational speed of the stirring component 22 is 5 to 15 r / min, preferably 10 to 15 r / min. For example, the specific rotational speed can be 5 r / min, 6 r / min, 7 r / min, 8 r / min, 9 r / min, 10 r / min, 11 r / min, 12 r / min, 13 r / min, 14 r / min, 15 r / min, etc.

[0133] In one embodiment, drying the material to be processed by heating component 23 includes the following steps:

[0134] The first heating pipe 231 of the heating assembly 23 is arranged around the outer wall of the main body 21 and / or delivers the heat exchange medium to the cavity of the main body 21;

[0135] The heat exchange medium is delivered to the rotating shaft 221 and the disc 222 of the stirring assembly 22 via the second heating pipe 232 of the heating assembly 23.

[0136] In this manner, the first heating pipe 231 injects a gaseous heat exchange medium with a certain temperature into the cavity of the main body 21, and the second heating pipe 232 injects a gaseous heat exchange medium with a certain temperature into the rotating shaft 221 and the disc 222. The material to be processed is in a heating environment, so that most of the moisture in the saturated granular carbon is evaporated in a very short time, thereby achieving the purpose of effectively controlling the moisture content of the saturated granular carbon when it enters the regeneration system.

[0137] In one embodiment, the pressure of the heat exchange medium is 0.25 to 0.55 MPa, preferably 0.40 to 0.55 MPa, and the specific pressure of the heat exchange medium can be selected from 0.25 MPa, 0.30 MPa, 0.35 MPa, 0.40 MPa, 0.45 MPa, 0.50 MPa, 0.55 MPa, etc.

[0138] In one embodiment, when the material to be processed is dried by heating the heating component 23, the condensed heat exchange medium is not directly discharged, but is returned to the conveying mechanism 3 and the feed tank 1 through the circulation component 6, so as to achieve recycling, energy saving and emission reduction, and reduce production costs.

[0139] Specifically, the heating component 23 is used to transport the heat exchange medium to heat the main body 21 and / or the stirring component 22, forming a condensed heat exchange medium which is then transported to the circulation component 6 through the condensation pipeline 5.

[0140] The heat exchange medium in the circulating tank 61 of the circulating component 6 is transported to the feed tank 1 through the liquid outlet pipe 62, and then to the separator 31 of the conveying mechanism 3 through the liquid outlet branch pipe 63.

[0141] In this manner, the heat exchange medium in the circulating tank 61 is transported to the feed tank 1 through the liquid outlet pipe 62 to provide the necessary solvent for the material to be treated, reducing the need for additional water from external equipment and saving production costs. The heat exchange medium in the circulating tank 61 is transported to the separator 31 of the conveying mechanism 3 through the liquid outlet pipe 62 and the liquid outlet branch pipe 63 to provide the separator 31 with the water needed to wash the material to be treated. This ensures the washing effect while reducing the need for additional water from external equipment, thus saving production costs.

[0142] In one embodiment, when heating and drying the material to be treated using the heating component 23, the following steps are also included:

[0143] The overflow of the upper clear liquid in the separator 31 of the conveying mechanism 3 is transported to the circulation tank 61 through the overflow pipe 65.

[0144] After the material to be treated is washed and settled by the separator 31, the clear liquid on top of the separator 31 is located above the separator 31, while the solids are deposited at the bottom of the separator 31, achieving solid-liquid separation in one step. As the liquid content of the material to be treated gradually increases, when the liquid content reaches the preset level, the water in the separator 31 overflows into the circulation tank 61, realizing water recycling and avoiding water waste.

[0145] The preprocessing method of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0146] Example 1

[0147] Using the saturated activated carbon from Example 18 of CN1292072C as the raw material for regeneration pretreatment, the specific steps are as follows:

[0148] (1) Add saturated granular carbon and water into feed tank 1 at a solid-liquid ratio of 1kg:8L to obtain the material to be processed;

[0149] (2) The material to be processed enters the separator 31 to settle. After settling, the bottom solution in the separator 31 is transported to the drying mechanism 2 through the spiral structure 33. The overflowing upper clear liquid enters the circulation tank through the overflow pipe 65 for collection and flows back to the feed tank 1.

[0150] The rotation speed of the spiral structure 33 is 10 rpm, and the water content of the material after the secondary solid-liquid separation by the spiral structure 33 is 58 wt%.

[0151] (3) The material after secondary solid-liquid separation by spiral structure 33 enters the drying unit 2 for drying;

[0152] The stirring component 22 rotates at 10 rpm, the heat exchange medium (steam) pressure is 0.40 MPa, the steam flow rate is 0.4 MPa, and the moisture content of the material after drying by the drying unit 2 is 20 wt%.

[0153] Example 2

[0154] The stirring component 22 rotates at 5 rpm, and the rest is the same as in Example 1. The moisture content of the material after drying by the drying mechanism 2 is 20 wt%.

[0155] Example 3

[0156] The stirring component 22 rotates at 15 rpm, and the other parameters are the same as in Example 1. The moisture content of the material after drying by the drying mechanism 2 is 25 wt%.

[0157] Example 4

[0158] The steam pressure was 0.25 MPa, and other parameters were the same as in Example 1. The moisture content of the material after drying by the drying unit 2 was 24 wt%.

[0159] Example 5

[0160] The steam pressure was 0.55 MPa, and other parameters were the same as in Example 1. The moisture content of the material after drying by the drying unit 2 was 18 wt%.

[0161] Example 6

[0162] The rotation speed of the spiral structure 33 is 15 rpm, and the rest is the same as in Example 1. The water content of the material after the secondary solid-liquid separation by the spiral structure 33 is 65 wt%, and the water content of the material after drying by the drying mechanism 2 is 23 wt%.

[0163] Example 7

[0164] The rotation speed of the spiral structure 33 is 5 rpm, and the rest is the same as in Example 1. The water content of the material after the secondary solid-liquid separation by the spiral structure 33 is 56 wt%, and the water content of the material after drying by the drying mechanism 2 is 18 wt%.

[0165] Comparative Example 1

[0166] The stirring component 22 rotates at 20 rpm, and the other parameters are the same as in Example 1. The moisture content of the material after drying by the drying mechanism 2 is 30 wt%.

[0167] Comparative Example 2

[0168] The stirring component 22 rotates at 3 rpm, and the rest is the same as in Example 1. The moisture content of the material after drying by the drying mechanism 2 is 34 wt%.

[0169] Comparative Example 3

[0170] The water vapor pressure was 0.2 MPa, and other parameters were the same as in Example 1. The moisture content of the material after drying by the drying unit 2 was 35 wt%.

[0171] Comparative Example 4

[0172] The steam pressure was 0.7 MPa, and other parameters were the same as in Example 1. The moisture content of the material after drying by the drying unit 2 was 30 wt%.

[0173] It should be noted that the embodiments of the present invention shown in the drawings and described in this specification are merely one example employing the principles of the invention. Those skilled in the art will clearly understand that the principles of the invention are not limited to any details or components of the apparatus shown in the drawings or described in the specification.

[0174] It should be understood that the application of this invention is not limited to the detailed structure and arrangement of the components presented in this specification. The invention can have other embodiments and can be implemented and performed in various ways. The foregoing variations and modifications fall within the scope of this invention. It should be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of the invention. The embodiments described in this specification illustrate the best known mode for carrying out the invention and will enable those skilled in the art to utilize the invention.

[0175] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and exemplary embodiments are to be considered as exemplary only, and the true scope and spirit of the invention are indicated by the appended claims.

[0176] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A pretreatment apparatus, characterized in that, include: Feed tank, used to hold materials to be processed; A drying mechanism, comprising a main body, a stirring assembly, and a heating assembly, wherein the stirring assembly is rotatably disposed within the main body, and the heating assembly is used to heat at least one of the main body and the stirring assembly; A conveying mechanism is disposed between the feed tank and the drying mechanism and communicates with the feed tank and the main body, for conveying the material to be processed in the feed tank to the main body; The discharge tank is connected to the drying mechanism and is used to contain the material dried by the drying mechanism.

2. The pretreatment apparatus according to claim 1, characterized in that, The heating assembly includes a first heating pipe for introducing a heat exchange medium, and the first heating pipe is arranged around the outer wall of the main body. And / or, the heating assembly includes a first heating pipe, the main body includes an outer cylinder and an inner cylinder that are nested together, a cavity is provided between the outer cylinder and the inner cylinder, the stirring assembly is rotatably disposed in the inner cylinder, and the first heating pipe is connected to the cavity for introducing a heat exchange medium into the cavity.

3. The pretreatment apparatus according to claim 2, characterized in that, The stirring assembly includes a rotating shaft and a disc. The rotating shaft is rotatably disposed within the main body and passes through the disc. The rotating shaft is connected to the disc. The heating assembly includes a second heating pipe connected to the rotating shaft. The second heating pipe can deliver a heat exchange medium to the disk through the rotating shaft for drying the material to be processed.

4. The pretreatment apparatus according to claim 3, characterized in that, The stirring assembly further includes: A lifting plate is positioned at the edge of the disc; The thickness of the disk along the axial direction of the rotating shaft gradually decreases from the center to the edge.

5. The pretreatment apparatus according to claim 3, characterized in that, The stirring assembly further includes: A feeder is disposed on the edge of the disc. The main body has an inlet and an outlet at both ends along its axial direction. The inlet is connected to the conveying mechanism, and the outlet is connected to the discharge tank. The feeder is disposed at an angle to the axial direction of the main body, so that the material to be processed in the main body can move from the inlet to the outlet.

6. The pretreatment apparatus according to any one of claims 1-5, characterized in that, The conveying mechanism includes: A separator, connected to the feed tank, is used for cleaning the material to be processed and for primary solid-liquid separation; A conveying body, one end of which is connected to the bottom of the separator, and the other end of which is connected to the drying mechanism; A spiral structure is rotatably mounted within the conveying body. The axial direction of the spiral structure is at an angle to the axial direction of the main body, allowing the material after solid-liquid separation by the separator to undergo secondary solid-liquid separation and be conveyed to the drying mechanism via the spiral structure.

7. The pretreatment apparatus according to any one of claims 1-5, characterized in that, Also includes: A condensing pipeline, which is connected to at least one of the main body and the stirring assembly, is used to transport the condensed heat exchange medium. And / or, a circulation pipeline, one end of which is connected to the discharge tank and the other end of which is connected to the heating component, wherein the discharge tank supplies heat exchange medium to the heating component through the circulation pipeline.

8. The pretreatment apparatus according to claim 7, characterized in that, Also includes: The circulation component is connected to the conveying mechanism, the condenser pipe and the feed tank, so that the heat exchange medium output from the conveying mechanism and the condenser pipe flows back to the conveying mechanism and the feed tank respectively through the circulation component.

9. The pretreatment apparatus according to claim 8, characterized in that, The loop component includes: The circulation tank is connected to the condensate pipeline; The liquid outlet pipeline has one end connected to the circulation tank and the other end connected to the feed tank. A liquid outlet branch pipe, one end of which is connected to the liquid outlet pipeline and the other end of which is connected to the conveying mechanism; A circulating pump is used to transport the heat exchange medium in the circulating tank to the feed tank through the liquid outlet pipeline, and to the conveying mechanism through the liquid outlet branch pipe.

10. The pretreatment apparatus according to claim 9, characterized in that, The loop component also includes: An overflow pipe is provided, with one end connected to the conveying mechanism and the other end connected to the circulation tank. The upper clear liquid overflowing from the conveying mechanism is transported to the circulation tank through the overflow pipe.

11. A preprocessing method, characterized in that, For controlling the pretreatment apparatus according to any one of claims 1-10, the pretreatment method includes the following steps: The material to be processed is placed in the feed tank and transported to the drying unit by the conveying mechanism. The material to be processed in the main body is stirred by the stirring component of the drying mechanism, heated and dried by the heating component, and then conveyed to the discharge tank after drying. And / or, the ratio of saturated particulate carbon to water in the material to be treated in the feed tank is 1 kg: (5-10) L.

12. The pretreatment method according to claim 11, characterized in that, The process of conveying materials to be processed using a conveyor mechanism includes the following steps: The separator of the conveying mechanism is used to clean the material to be processed and to perform solid-liquid separation on the material. The material after solid-liquid separation in the separator is subjected to secondary solid-liquid separation using the spiral structure of the conveying mechanism and then conveyed to the drying mechanism via the spiral structure. And / or, when using a stirring assembly to stir the material to be processed in the main body, the rotation speed of the stirring assembly is 5 to 15 r / min, preferably 10 to 15 r / min.

13. The pretreatment method according to claim 12, characterized in that, The rotational speed of the spiral structure is 5 to 15 r / min, preferably 5 to 10 r / min; And / or, the moisture content of the material after secondary solid-liquid separation by the spiral structure is less than 65 wt%, preferably less than 62 wt%; And / or, the moisture content of the material after drying by the drying unit is less than 25 wt%, preferably less than 22 wt%.

14. The pretreatment method according to claim 11, characterized in that, Drying the material to be processed by heating it with a heating element includes the following steps: The first heating pipe of the heating assembly is arranged around the outer wall of the main body and / or delivers the heat exchange medium into the cavity of the main body; The heat exchange medium is delivered to the rotating shaft and disc of the stirring assembly through the second heating pipe of the heating assembly; And / or, the steam pressure of the heat exchange medium in the first heating pipe and / or the heat exchange medium in the second heating pipe is 0.25 to 0.55 MPa, preferably 0.40 to 0.55 MPa.

15. The pretreatment method according to claim 11, characterized in that, When using a heating element to heat the material to be processed for drying, the following steps are also included: The main body and / or the stirring assembly are heated by a heat exchange medium delivered by a heating component, and the condensed heat exchange medium is delivered to the circulation component through a condensation pipeline. The heat exchange medium in the circulating tank of the circulating component is transported to the feed tank through the liquid outlet pipeline, and then to the separator of the conveying mechanism through the liquid outlet branch pipe; And / or, the clear liquid overflowing from the separator in the conveying mechanism is conveyed to the circulation tank through the overflow pipeline.

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