A production line and method for organic waste treatment

Abstract

The present application relates to the field of environmental protection treatment, and particularly relates to a production line and method for organic garbage treatment, in the production line, organic garbage is made into slurry containing organic matter by a pulping and sorting integrated machine, and the slurry is filtered out by a press machine; the slurry in the press machine can be transferred to a hydrolyzer by a preheating tank, and is hydrolyzed into a solution containing water-soluble fertilizer in the hydrolyzer; the preheating tank, a cooling liquid tank and the hydrolyzer are connected in series, in the case that the hydrolysis reaction is completed in the hydrolyzer, the cooling liquid tank can adjust the temperature in the hydrolyzer to a first preset temperature, and adjust the temperature in the preheating tank to a second preset temperature; wherein, the hydrolysis temperature required for the hydrolysis reaction in the hydrolyzer > the first preset temperature > the second preset temperature > the third preset temperature, and the third preset temperature is the temperature required for the solution in the hydrolyzer to be discharged. In this way, the preheating tank can recover the waste heat generated in the hydrolysis reaction process, and reduce the heat consumption in the subsequent hydrolysis reaction.

Description

Technical Field

[0001] This invention relates to the field of environmental protection treatment technology, and in particular to a production line and method for treating organic waste. Background Technology

[0002] Fermentation and incineration are commonly used technologies to treat organic waste such as fruit and vegetable scraps. Incineration has a low utilization rate of organic waste and causes secondary pollution; while fermentation is costly, has a long treatment cycle, and low utilization rate.

[0003] In summary, the utilization rate of organic waste treatment methods in related technologies is low, and the economic benefits of treatment are not high. Summary of the Invention

[0004] The purpose of this invention is to provide a production line and method for organic waste treatment, so as to solve the problems of low utilization rate of organic waste and low economic benefits of organic waste treatment in related technologies.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A production line for organic waste treatment includes: an integrated pulping and sorting machine capable of producing organic waste into a slurry containing organic matter; a press, wherein the slurry in the integrated pulping and sorting machine is transferred to the press for pressing to filter out the residue; a preheating tank and a hydrolyzer, wherein the slurry containing organic matter in the press is transferred to the hydrolyzer via the preheating tank and hydrolyzed in the hydrolyzer into a solution containing water-soluble fertilizer; and a cooling tank, wherein the preheating tank, the cooling tank, and the hydrolyzer are connected by pipelines, and the cooling tank can adjust the temperature inside the hydrolyzer to a first preset temperature and the temperature inside the preheating tank to a second preset temperature after the hydrolyzer completes the hydrolysis reaction; wherein the hydrolysis temperature required for the hydrolyzer to complete the hydrolysis reaction is greater than the first preset temperature, the second preset temperature, and the third preset temperature is the temperature required for the solution in the hydrolyzer to be discharged.

[0007] Optionally, it also includes a cooling unit connected to the hydrolyzer to adjust the temperature inside the hydrolyzer to a third preset temperature.

[0008] Optionally, it also includes a catalyst addition device connected to the preheating tank, the catalyst addition device being used to add catalyst to the preheating tank, and the hydrolyzer being able to receive the organic-containing slurry and catalyst transferred from the preheating tank.

[0009] Optionally, the preheating tank is equipped with a first cooling coil, and the hydrolyzer is equipped with a second cooling coil; the coolant tank, the first cooling coil, and the second cooling coil are connected end-to-end; the cooling unit is connected to the second cooling coil.

[0010] Optionally, the preheating tank includes: a tank body, with an inlet for the slurry containing organic matter and the catalyst to enter, and an outlet connected to the hydrolyzer; a first cooling coil spirally wound in the tank body, and / or on the inner wall of the tank body; a stirring paddle rotatably disposed in the tank body, with the first cooling coil surrounding the stirring paddle; and a motor disposed on the tank body, connected to the stirring paddle, to drive the stirring paddle to rotate.

[0011] Optionally, it also includes a steam generator and an air compressor unit that are connected to the hydrolyzer. The steam generator is used to introduce steam into the hydrolyzer to adjust the temperature inside the hydrolyzer to the hydrolysis temperature, and the air compressor unit is able to adjust the pressure inside the hydrolyzer to the hydrolysis pressure.

[0012] Optionally, it also includes a filter, with the hydrolyzer and the filter connected in sequence. The filter can filter the solution containing water-soluble fertilizer after hydrolysis by the hydrolyzer to obtain solid fertilizer and water-soluble fertilizer.

[0013] Optionally, it also includes a conveyor and a magnetic separator. The conveyor can transfer organic waste to the press, and the magnetic separator is set up in conjunction with the conveyor to screen out ferromagnetic impurities in the organic waste on the conveyor.

[0014] Optionally, it also includes a crusher and a bag-breaking screening machine; the crusher can receive and crush the organic waste transported by the conveyor, and can transport the crushed organic waste to the bag-breaking screening machine; the bag-breaking screening machine can transport the received organic waste to the pulping and sorting integrated machine, and screen out the uncrushed debris in the transported organic waste.

[0015] Optionally, it also includes a homogenizer, which can be used to break down the organic slurry in the press and then transfer it to a preheating tank.

[0016] A method for treating organic waste, employing the above-mentioned production line, the method comprising:

[0017] The integrated pulping and sorting machine transforms organic waste into a slurry containing organic matter.

[0018] The press receives the slurry from the pulping and sorting machine and presses the slurry to filter out the residue.

[0019] The slurry in the press is transferred to the preheating tank.

[0020] The slurry in the preheating tank is transferred to the hydrolyzer.

[0021] The hydrolyzer hydrolyzes the slurry into a solution containing water-soluble fertilizer.

[0022] Adjust the temperature inside the hydrolyzer to the third preset temperature.

[0023] The hydrolyzer transports solutions containing water-soluble fertilizers.

[0024] After the slurry in the preheating tank is transferred to the hydrolyzer, the method further includes:

[0025] The slurry in the press is transferred to the preheating tank.

[0026] After hydrolyzing the slurry into a solution containing water-soluble fertilizer in a hydrolyzer, the method further includes:

[0027] The coolant in the coolant tank is controlled to circulate in the coolant tank, preheating tank and hydrolyzer to adjust the temperature in the hydrolyzer to a first preset temperature and to preheat the slurry in the preheating tank to a second preset temperature.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] A production line for organic waste treatment includes: an integrated pulping and sorting machine capable of producing organic waste into a slurry containing organic matter; a press, wherein the slurry in the integrated pulping and sorting machine is transferred to the press for pressing to filter out the residue; a preheating tank and a hydrolyzer, wherein the slurry containing organic matter in the press is transferred to the hydrolyzer via the preheating tank and hydrolyzed in the hydrolyzer into a solution containing water-soluble fertilizer; and a cooling tank, wherein the preheating tank, the cooling tank, and the hydrolyzer are connected by pipelines, and the cooling tank can adjust the temperature inside the hydrolyzer to a first preset temperature and the temperature inside the preheating tank to a second preset temperature after the hydrolyzer completes the hydrolysis reaction; wherein the hydrolysis temperature required for the hydrolyzer to complete the hydrolysis reaction is greater than the first preset temperature, the second preset temperature, and the third preset temperature is the temperature required for the solution in the hydrolyzer to be discharged.

[0030] As described above, the production line of this application may further include coolant tanks located in the hydrolysis workshop. The preheating tank, coolant tank, and hydrolyzer are connected end-to-end to form a first cooling circulation pipeline, which includes a first control valve and a power pump.

[0031] When the hydrolysis reaction is complete in the hydrolyzer, the temperature inside the hydrolyzer is the hydrolysis temperature. At this point, the first control valve opens, and the second control valve (described later) closes, connecting the first cooling circulation pipe. The coolant in the coolant tank then adjusts the temperature inside the hydrolyzer to the first preset temperature and the temperature inside the preheating tank to the second preset temperature. The sequence is: hydrolysis temperature > first preset temperature > second preset temperature > third preset temperature. The third preset temperature is the temperature required for the solution to be discharged from the hydrolyzer. Specifically, the hydrolysis reaction in the hydrolyzer requires high temperature and high pressure to complete, such as a hydrolysis temperature of 120℃~130℃ and a hydrolysis pressure of 0.7~0.9 MPa. After this, the hydrolyzer needs to be cooled and depressurized to allow it to properly discharge the hydrolyzed solution; for example, the third preset temperature is set to less than 50℃.

[0032] The energy consumption of the hydrolyzer during the hydrolysis reaction can be reduced by using the first cooling circulation pipeline. The principle is detailed below:

[0033] The hydrolyzer needs to be heated to the hydrolysis temperature to achieve the hydrolysis reaction of the slurry containing organic matter. This hydrolysis temperature can be 120℃~130℃. After the hydrolysis reaction is complete, the hydrolyzer needs to be cooled and depressurized to prevent the high temperature and high pressure inside from affecting the normal discharge of the solution. In this embodiment, the hydrolyzer is cooled using a two-stage cooling method. Specifically, the first control valve is opened to use the coolant in the coolant tank to lower the temperature inside the hydrolyzer from the hydrolysis temperature to a first preset temperature, and to preheat the temperature in the preheating tank to a second preset temperature, for example, the first preset temperature is 80~100℃ and the second preset temperature is 50~70℃. This is the first stage of cooling. Then, the first preset temperature inside the hydrolyzer is lowered to a third preset temperature, for example, less than 50℃, using the cooling unit or natural cooling method described later. This is the second stage of cooling.

[0034] The reason for using a two-stage cooling system is to collect the waste heat generated during the cooling process. Specifically, when the first control valve is open and the second control valve is closed, the pump in the first cooling circulation pipeline remains running, and the preheating tank begins to collect the waste heat generated after the hydrolysis reaction in the hydrolyzer until the temperature of the hydrolyzer is adjusted to the first preset temperature and the temperature of the preheating tank is preheated to the second preset temperature. Thus, if a subsequent hydrolysis reaction is to occur, before the hydrolysis reaction and after the slurry containing organic matter enters the preheating tank, the first control valve is opened. The waste heat collected in the preheating tank is used to preheat the slurry transferred from the press to the preheating tank to the second preset temperature. Then, the slurry preheated to the second preset temperature is transferred from the preheating tank to the hydrolyzer. Finally, an external heat source is used to heat the hydrolyzer to the hydrolysis temperature to complete the hydrolysis reaction. In other words, the initial temperature at which the external heat source heats the hydrolyzer is higher than the third preset temperature.

[0035] As can be seen, the first cooling circulation pipeline formed by connecting the start and end pipes of the hydrolyzer, preheating tank, and coolant tank can, in three aspects, firstly, cool the solution after the hydrolysis reaction in the hydrolyzer, thereby improving the processing rate of the production line of this application; secondly, the preheating tank can temporarily store the slurry transferred by the press to ensure the orderly operation of the processing flow of the production line of this application; and thirdly, the preheating tank can recover the waste heat generated during the hydrolysis reaction in the hydrolyzer and feed the waste heat back to the slurry in the preheating tank in subsequent hydrolysis reactions, thereby reducing the heat consumption of external heat sources. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the production line process for organic waste treatment according to the present invention;

[0037] Figure 2 This is a structural diagram of the preheating tank of the present invention.

[0038] icon:

[0039] 100-Pulping Workshop

[0040] 101-Hopper, 102-Presser, 103-First Storage Tank, 104-Conveyor, 105-Magnetic Separator, 106-Crusher, 107-Bag Breaking Screener, 108-Pulping and Separating Integrated Machine, 109-Homogenizer, 110-Sand Remover, 111-Deodorization Device

[0041] 200-Hydrolysis Workshop

[0042] 201-Hydrolyzer, 2011-Second Cooling Coil, 202-Second Storage Tank, 203-Preheating Tank, 2031-First Cooling Coil, 2032-Tank Body, 2035-Inlet, 2036-Outlet, 2033-Agitator, 2037-Paddle Rod, 2038-Paddle Blade, 2034-Motor, 204-Catalyst Addition Device, 205-Acid-Base Neutralization Device, 206-Cooling Unit, 207-Coolant Tank, 208-First Control Valve, 209-Second Control Valve, 210-Steam Generator, 211-Air Compressor Unit, 212-Filter

[0043] 300-Emulsification and Filling Workshop

[0044] 301-Emulsifier, 302-Third storage tank, 303-Metering and filling device. Detailed Implementation

[0045] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0046] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0047] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but that it can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0048] Furthermore, the use of terms such as "first," "second," "third," etc. in terminology is merely for distinguishing identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0049] Furthermore, in the description of the embodiments of the present invention, "several", "several", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, nine, or even more than nine.

[0050] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0051] Related technologies such as fermentation and incineration of organic waste have low utilization rates and low economic benefits. Therefore, the technical solution of this application was developed. The following is a combination of... Figure 1 and Figure 2 To elaborate.

[0052] Example 1

[0053] This embodiment discloses a production line for organic waste treatment, including a first storage tank 103, a pulping and sorting integrated machine 108, a press 102, a hydrolyzer 201, a second storage tank 202, a preheating tank 203, and a cooling tank 207. The first storage tank 103, the pulping and sorting integrated machine 108, and the press 102 are all located in the pulping workshop 100, while the second storage tank 202, the hydrolyzer 201, the preheating tank 203, and the cooling tank 207 are all located in the hydrolysis workshop 200.

[0054] The integrated pulping and sorting machine 108 can crush the received organic waste through hammering, impact, and other methods, and then turn the received organic waste into a slurry containing organic matter. At the same time, the integrated pulping and sorting machine 108 can be equipped with filtration equipment such as filter screens to screen out granular impurities in the transported slurry containing organic matter. These granular impurities can be small-sized wastes that are not easily soluble in water, such as mud, sand, glass shards, ceramic shards, and long fibers, thereby improving the quality of water-soluble fertilizer produced by subsequent hydrolysis.

[0055] The slurry in the pulping and sorting machine 108 is transferred to the press 102 by the transmission action of the shaftless screw press. The press 102 can press the received slurry to filter out the residue. Here, the press 102 can be a screw press, which consists of a feed hopper, a pressing screw, a screw tube, a slag discharge pipe, and a drive device. The slurry containing organic matter after filtration in the pulping and sorting machine 108 enters the screw tube of the press 102. Under the action of the pressing screw, it is squeezed and dewatered, thereby filtering out the residue of the slurry. The slurry containing organic matter continues to pass through the filter screen, collects in the water receiving basin, and is pumped to the first storage tank 103 by the drain pipe. The remaining pressed residue is compressed and discharged through the slag discharge pipe. The screw press is a relatively mature application and will not be described in detail here. The organic waste used here can be fruit and vegetable organic waste. The organic matter in fruit and vegetable organic waste includes 75% sugar and hemicellulose, 9% cellulose and 5% lignin. It is rich in nutrients such as N, P and K, and is basically non-toxic. Its subsequent utilization rate is high.

[0056] Pumps are installed between the press 102 and the preheating tank 203, and between the preheating tank 203 and the hydrolyzer 201. Under pumping action, the slurry containing organic matter in the press 102 can be transferred through the preheating tank 203 to the hydrolyzer 201, where it is hydrolyzed into a solution containing water-soluble fertilizer. This water-soluble fertilizer can be small-molecule organic matter, such as amino acids, fatty acids, and sugars. The slurry containing organic matter in the hydrolyzer 201 can be pumped and transferred to the second storage tank 202 for storage. It can be seen that by using the press 102 to extract the liquid from organic waste and by using the hydrolyzer 201 to hydrolyze the slurry containing organic matter to obtain water-soluble fertilizer, the utilization rate and economic benefits of organic waste can be improved.

[0057] As described above, the production line of this application may also include a coolant tank 207 located in the hydrolysis workshop 200. The preheating tank 203, the coolant tank 207, and the hydrolyzer 201 are connected end-to-end to form a first cooling circulation pipeline, which is equipped with a first control valve 208 and a pump that provides power.

[0058] When the hydrolysis reaction is completed in the hydrolyzer 201, the temperature inside the hydrolyzer 201 is the hydrolysis temperature. At this time, the first control valve 208 opens, and the second control valve 209 (described later) closes, so that the first cooling circulation pipeline is connected. Then, the coolant in the coolant tank 207 can adjust the temperature inside the hydrolyzer 201 to the first preset temperature and adjust the temperature inside the preheating tank 203 to the second preset temperature. The hydrolysis temperature required for the hydrolyzer 201 to complete the hydrolysis reaction is: > first preset temperature > second preset temperature > third preset temperature. The third preset temperature is the temperature required for the solution inside the hydrolyzer 201 to be discharged. Specifically, the hydrolysis reaction in the hydrolyzer 201 requires high temperature and high pressure to ensure the hydrolysis rate, such as a hydrolysis temperature of 120℃~130℃ and a hydrolysis pressure of 0.7~0.9 MPa. After this, the hydrolyzer 201 needs to be cooled and depressurized so that the hydrolyzer 201 can normally discharge the solution after the hydrolysis reaction, for example, the third preset temperature is set to less than 50℃.

[0059] The energy consumption of the hydrolyzer 201 during the hydrolysis reaction can be reduced by using the first cooling circulation pipe. The principle is detailed below:

[0060] The hydrolyzer 201 is heated to the hydrolysis temperature to hydrolyze the slurry containing organic matter. This hydrolysis temperature can be between 120°C and 130°C. After the hydrolysis reaction is complete, the hydrolyzer 201 needs to be cooled and depressurized to prevent the high temperature and pressure inside from affecting the normal discharge of the solution. In this embodiment, the cooling of the hydrolyzer 201 is achieved using a two-stage cooling method. Specifically, the first control valve 208 is opened to use the coolant in the coolant tank 207 to lower the temperature inside the hydrolyzer 201 from the hydrolysis temperature to a first preset temperature, and to preheat the temperature in the preheating tank 203 to a second preset temperature, for example, the first preset temperature is 80-100°C and the second preset temperature is 50-70°C. This is the first-stage cooling. Then, the first preset temperature inside the hydrolyzer 201 is lowered to a third preset temperature, for example, less than 50°C, using the cooling unit 206 (described later) or natural cooling. This is the second-stage cooling.

[0061] The reason for using a two-stage cooling system is to collect the waste heat generated during the cooling process. Specifically, when the first control valve 208 is opened and the second control valve 209 is closed, the pump in the first cooling circulation pipeline is kept running, and the coolant in the coolant tank 207 circulates. The preheating tank 203 then begins to collect the waste heat generated after the hydrolysis reaction in the hydrolyzer 201 until the temperature of the hydrolyzer 201 is adjusted to the first preset temperature and the temperature of the preheating tank 203 is preheated to the second preset temperature. Thus, if a hydrolysis reaction is to be carried out subsequently, before the hydrolysis reaction in the hydrolyzer 201 and after the slurry containing organic matter enters the preheating tank 203, the residual heat collected in the preheating tank 203 is used to preheat the slurry transferred from the press 102 to the preheating tank 203 to the second preset temperature; then the slurry preheated to the second preset temperature is transferred from the preheating tank 203 to the hydrolyzer 201; then the hydrolyzer 201 is heated to the hydrolysis temperature by an external heat source to complete the hydrolysis reaction. In other words, the starting temperature at which the external heat source heats the hydrolyzer 201 is higher than the third preset temperature.

[0062] As can be seen, the first cooling circulation pipeline formed by connecting the beginning and end pipes of the hydrolyzer 201, the preheating tank 203, and the coolant tank 207 can, in firstly, cool down the hydrolyzer 201 after the hydrolysis reaction, thereby improving the processing rate of the production line of this application; in secondly, the preheating tank 203 can recover the waste heat generated during the hydrolysis reaction of the hydrolyzer 201, and feed the waste heat back to the slurry in the preheating tank 203 in subsequent hydrolysis reactions, thereby reducing the heat consumption of external heat sources, thereby reducing production costs and improving economic efficiency; in thirdly, the preheating tank 203 can temporarily store the slurry transferred by the press 102 to ensure the orderly operation of the processing flow of the production line of this application.

[0063] Optionally, the production line of this application may also include a cooling unit 206 located in the hydrolysis workshop 200. The cooling unit 206 is connected to the hydrolyzer 201 to form a second cooling circulation pipeline. A second control valve 209 is provided in the second cooling circulation pipeline. The cooling unit 206 typically consists of a compressor, condenser, expansion valve, and evaporator, and the four main components are connected in a certain order by copper pipes to form a closed system. A certain amount of refrigerant is charged in the system. The chilled water flowing out of the cooling unit 206 is pumped to the hydrolyzer 201 for heat exchange to remove the heat in the hydrolyzer 201, thereby cooling the hydrolyzer 201. The cooling unit 206 is a relatively mature application component and will not be described in detail here.

[0064] With the first control valve 208 disconnected and the second control valve 209 open, the second cooling circulation pipeline is connected, and the cooling unit 206 can adjust the temperature inside the hydrolyzer 201 to the third preset temperature. As mentioned above, after the hydrolysis reaction, the hydrolyzer 201 first drops to the first preset temperature, and then can be naturally cooled to lower the internal temperature of the hydrolyzer 201 to the third preset temperature, thereby achieving pressure relief and discharge of the solution in the hydrolyzer 201. However, the natural cooling rate is slow, so the cooling unit 206 is connected to the hydrolyzer 201 to accelerate the cooling rate of the hydrolyzer 201, thereby improving the waste processing speed of the production line of this application.

[0065] It should be noted that the cooling effect of the cooling unit 206 in this application is stronger than that of the coolant tank 207. This is because the coolant tank 207 will experience a temperature increase after cooling the hydrolyzer 201 after the hydrolysis reaction is completed and preheating the preheating tank 203. After that, it will undergo the following process:

[0066] The hydrolyzer 201 will continue to be cooled by the cooling unit 206 until it is cooled and depressurized to the third preset temperature so that the solution containing water-soluble fertilizer in the hydrolyzer 201 can be discharged.

[0067] After the solution containing water-soluble fertilizer in the hydrolyzer 201 is discharged, the slurry and catalyst that have been preheated in the preheating tank 203 enter the hydrolyzer 201 to wait for the temperature to rise and complete the hydrolysis reaction.

[0068] After the slurry and catalyst in the preheating tank 203 enter the hydrolyzer 201, the slurry and catalyst will be replenished again.

[0069] The slurry and catalyst in hydrolyzer 201 complete the hydrolysis reaction to generate a solution containing water-soluble fertilizer.

[0070] In this way, the time required to complete the above process is just enough to allow the coolant in the coolant tank 207 to cool naturally. Then, after the hydrolyzer 201 completes the hydrolysis reaction, the coolant in the coolant tank 207 can participate in cooling the hydrolyzer 201 and preheating the preheating tank 203. This cycle repeats continuously, and the natural cooling method of the coolant tank 207 can reduce its manufacturing cost.

[0071] Optionally, the production line of this application may further include a catalyst addition device 204 connected to the preheating tank 203, located within the hydrolysis workshop 200. The catalyst addition device 204 is used to add catalyst to the preheating tank 203, and the hydrolyzer 201 can receive the organic-containing slurry and catalyst transferred from the preheating tank 203. The catalyst can be an acidic or alkaline catalyst, which can accelerate the hydrolysis reaction rate in the hydrolyzer 201 and improve the treatment efficiency of organic waste.

[0072] Optionally, a stirring device can be installed in the preheating tank 203 to fully mix the slurry containing organic matter and the catalyst, thereby accelerating the hydrolysis reaction in the subsequent hydrolyzer 201. It can be seen that the preheating tank 203 not only achieves thorough mixing of the organic slurry and catalyst but also preheats them, thus enabling the reuse of the preheating tank 203.

[0073] In summary, the first cooling circulation pipeline, for the hydrolyzer 201, accelerates the cooling rate after the hydrolysis reaction while simultaneously recovering the waste heat generated. For the preheating tank 203, the first cooling circulation pipeline enables waste heat recovery while ensuring thorough mixing of the organic-containing slurry and catalyst. This achieves multi-purpose utilization, fully leveraging the functions of each component and improving the utilization rate of all parts.

[0074] Optionally, the production line of this application may further include an acid-base neutralization device 205 located in the hydrolysis workshop 200. The acid-base neutralization device 205 is connected to the hydrolyzer 201. As mentioned above, the hydrolyzer 201 will receive a slurry containing organic matter and a catalyst. Therefore, after the hydrolysis reaction, the acid-base neutralization device 205 needs to add a regulator to the hydrolyzer 201 to neutralize the water-soluble fertilizer. Specifically, when the catalyst addition device 204 adds an acidic catalyst, the acid-base neutralization device 205 can add an alkaline regulator to the hydrolyzer 201 after the hydrolysis reaction is completed, thereby neutralizing the water-soluble fertilizer generated in the hydrolyzer 201, reducing the acidity of the water-soluble fertilizer, and preventing soil acidification when the water-soluble fertilizer is used subsequently. Conversely, the acid-base neutralization device 205 adds an acidic regulator to the hydrolyzer 201, thereby reducing the alkalinity of the water-soluble fertilizer and preventing soil alkalization when the water-soluble fertilizer is used subsequently.

[0075] Optionally, the preheating tank 203 may be equipped with a first cooling coil 2031, and the hydrolyzer 201 may be equipped with a second cooling coil 2011. The coolant tank 207, the first cooling coil 2031, and the second cooling coil 2011 are connected end-to-end to form a first cooling circulation pipeline; the cooling unit 206 is connected end-to-end to the second cooling coil 2011 to form a second cooling circulation pipeline. The preheating tank 203 achieves temperature adjustment through the first cooling coil 2031, while the hydrolyzer 201 achieves temperature adjustment through the second cooling coil 2011. Alternatively, temperature adjustment can be achieved by providing a jacket layer on the periphery of the preheating tank 203 connecting to the first cooling circulation pipeline, and by providing a jacket layer on the periphery of the hydrolyzer 201 connecting to the second cooling circulation pipeline; this will not be detailed here.

[0076] Optionally, the preheating tank 203 includes a tank body 2032, an agitator 2033, and a motor 2034. The tank body 2032 stores the slurry and catalyst, and has an inlet 2035 for the slurry and catalyst containing organic matter to enter, and an outlet 2036 connecting to the hydrolyzer 201. A first cooling coil 2031 is spirally wound within the tank body 2032, and / or on the inner wall of the tank body 2032. The agitator 2033 is rotatably disposed within the tank body 2032, and the first cooling coil 2031 surrounds the agitator 2033 to improve the integration of the device and facilitate sufficient stirring and preheating of the slurry and catalyst. The motor 2034 is disposed on the tank body 2032 and connected to the agitator 2033 to drive the agitator 2033 to rotate.

[0077] During operation, the slurry and catalyst enter the tank through the feed inlet 2035. Then, the motor 2034 drives the stirring paddle 2033 to rotate, so as to achieve stirring and mixing of the slurry and catalyst. During the stirring process, the first cooling coil 2031 preheats the slurry and catalyst. After the slurry and catalyst are fully stirred, mixed and preheated, they are transferred to the hydrolyzer 201 through the discharge outlet 2036 for hydrolysis.

[0078] Optionally, two inlets 2035 can be provided to allow slurry containing organic matter and catalyst to enter the tank 2032 respectively. Alternatively, one inlet 2035 can be provided, through which slurry containing organic matter and catalyst can enter the tank 2032.

[0079] Optionally, the stirring paddle 2033 includes a paddle rod 2037 connected to the motor 2034, and paddle blades 2038 connected to the paddle rod 2037. Multiple sets of paddle blades 2038 are arranged along the extension direction of the paddle rod 2037 to improve the mixing effect of the catalyst and slurry.

[0080] Optionally, the height of the inlet 2035 is greater than the height of the outlet 2036, with the height direction along the direction of gravity. The cross-sectional area of ​​the bottom of the tank 2032 decreases away from the inlet 2035, and the cross-sectional area is perpendicular to the direction of gravity. For example, the bottom of the tank 2032 is conical, while the outlet 2036 is located at the point of minimum cross-sectional area at the bottom of the tank 2032, so that the slurry and catalyst can be fully discharged from the tank 2032 after preheating and uniform stirring, preventing residue.

[0081] Optionally, the feed inlet 2035 is located around the periphery of the tank body 2032, while the discharge outlet 2036 is located opposite to the agitator 2033 along the direction of gravity, so as to improve the rationality of the layout.

[0082] Optionally, both the tank body 2032 and the first cooling coil 2031 can be made of non-metallic materials to prevent corrosion caused by the acidity or alkalinity of the catalyst. For example, the first cooling coil 2031 can be made of graphite, while the tank body 2032 can be made of fiberglass. At the same time, insulation material can be added to the outer wall or interlayer of the tank body 2032 to ensure the preheating effect.

[0083] Optionally, the production line of this application may further include a steam generator 210 and an air compressor unit 211 connected to the hydrolyzer 201. Both the steam generator 210 and the air compressor unit 211 are located in the hydrolysis workshop 200. The steam generator 210 is used to introduce steam into the hydrolyzer 201 to adjust the temperature inside the hydrolyzer 201 to the hydrolysis temperature, i.e., 120℃~130℃ as mentioned above. The air compressor unit 211 can adjust the pressure inside the hydrolyzer 201 to the hydrolysis pressure, which can be 0.7~0.9 MPa. Then, the temperature and pressure are maintained for a preset time, which can be 2~4 hours, to ensure a sufficient hydrolysis reaction.

[0084] Optionally, the production line for organic waste treatment may also include a filter 212 located in the hydrolysis workshop 200. The hydrolyzer 201 and the filter 212 are connected in sequence, and a pump is installed between the hydrolyzer 201 and the filter 212. In this way, the hydrolyzer 201 can pump the hydrolyzed solution containing water-soluble fertilizer to the filter 212, and the filter 212 can filter the hydrolyzed solution containing water-soluble fertilizer from the hydrolyzer 201 to obtain solid fertilizer and water-soluble fertilizer. The solid fertilizer can be large-particle organic fertilizer that is difficult to dissolve in water, such as cellulose, while the water-soluble fertilizer is pumped through the filter 212 to the second storage tank 202 for storage, thereby improving the utilization rate of organic waste and thus improving the economic benefits of organic waste treatment.

[0085] Example 2

[0086] This embodiment further describes the pulping workshop 100 based on embodiment 1, as detailed below.

[0087] The production line of this application may further include a silo 101, a conveyor 104, and a magnetic separator 105, all located in the pulping workshop 100. The silo 101 is used to store and stockpile organic waste. The silo 101 must be designed to ensure its airtightness to minimize odor leakage from the organic waste. The conveyor 104 can be a slab conveyor, which is suitable for large, heavy, hot, and corrosive materials and is well-suited to the organic waste processing and transportation of this application, transferring the organic waste from the silo 101 to the press 102. The magnetic separator 105 is positioned opposite the conveyor 104 to screen out ferromagnetic impurities from the organic waste on the conveyor 104, thereby improving the quality of the subsequently produced water-soluble fertilizer and preventing metal pollution of the soil.

[0088] Optionally, the production line of this application may also include a deodorization device 111 located in the pulping workshop 100, the deodorization device 111 being connected to the silo 101 in order to filter out odorous gases in the silo 101 and the pulping workshop 100.

[0089] Optionally, the production line of this application may further include a crusher 106 and a bag-breaking screening machine 107, both located in the pulping workshop 100. A screw conveyor may be installed between the crusher 106 and the bag-breaking screening machine 107. The crusher 106 can receive and crush the organic waste transported by the conveyor 104 to reduce the size of large pieces of organic waste, and can transport the crushed organic waste to the bag-breaking screening machine 107 via the screw conveyor. The bag-breaking screening machine 107 can transport the received organic waste to the integrated pulping and sorting machine 108, and screen out the uncrushed debris in the transported organic waste. Here, the uncrushed debris in the organic waste can be plastic bags, plastic bottles, bones, glass shards, ceramic shards, and other waste that is not easily soluble in water but has a large volume, thereby improving the quality of the water-soluble fertilizer produced by subsequent hydrolysis.

[0090] Furthermore, a screw conveyor can be installed between the bag-breaking screening machine 107 and the integrated pulping and sorting machine 108, allowing the bag-breaking screening machine 107 to transfer organic waste to the integrated pulping and sorting machine 108 via the screw conveyor. Optionally, the production line of this application may also include a homogenizer 109 located in the pulping workshop 100. The slurry containing organic matter in the press 102 can be transferred to the preheating tank 203 after being processed by the homogenizer 109 to break down the wall. Here, the wall-breaking process is a process of loosening or pulverizing the structure of the slurry containing organic matter, making it easier for the slurry containing organic matter to undergo a hydrolysis reaction in the hydrolyzer 201, thereby accelerating the organic waste treatment efficiency.

[0091] Furthermore, the homogenizer 109 can be a high-pressure homogenizer, also known as a high-pressure fluid nano-homogenizer. It can make the suspension material flow at high speed through a high-pressure homogenizing chamber with a special internal structure under ultra-high pressure of up to 60,000 psi, causing a series of changes in the material's physical, chemical, and structural properties, ultimately achieving the effect of homogenization.

[0092] Optionally, the production line of this application may also include a desander 110 located in the pulping workshop 100, which is disposed between the press 102 and the first storage tank 103. The desander 110 is capable of receiving the slurry containing organic matter transferred from the press 102, and transferring the slurry containing organic matter to the first storage tank 103, and removing impurities from the slurry containing organic matter. These impurities include sand, gravel, cinders, or other heavy solid residues. The settling velocity and density of these impurities are much greater than those of the organic matter in the slurry containing organic matter, and therefore they can be removed to further improve the quality of the water-soluble fertilizer produced subsequently.

[0093] Example 3

[0094] Based on Examples 1 and 2, this embodiment further describes the emulsification and filling workshop 300 of the production line of this application, as detailed below.

[0095] The production line of this application may further include an emulsifier 301 and a third storage tank 302, both located in the emulsification and filling workshop 300. The second storage tank 202, the emulsifier 301, and the third storage tank 302 are connected in sequence. The emulsifier 301 can emulsify the water-soluble fertilizer transferred from the second storage tank 202 and transfer the emulsified water-soluble fertilizer to the third storage tank 302. Here, the emulsifier 301 can be a high-shear emulsifier, which can emulsify the water-soluble fertilizer, making the water-soluble fertilizer fully refined and uniform, and preventing the water-soluble fertilizer from gelling and settling during transportation and storage.

[0096] The production line of this application may also include a metering and filling device 303 located in the emulsification and filling workshop 300. The metering and filling device 303 is used to receive the water-soluble fertilizer transferred by the emulsifier 301 and fill the water-soluble fertilizer into finished products according to the preset metering.

[0097] Example 4

[0098] This embodiment describes a method for treating organic waste, which uses the aforementioned production line. The method for treating organic waste is detailed below.

[0099] In the pulping workshop 100, the following components are arranged in sequence: silo 101, conveyor 104 and its magnetic separator 105, crusher 106, bag-breaking screener 107, integrated pulping and sorting machine 108, press 102, sand remover 110, homogenizer 109, and first storage tank 103. Thus, the pulping process in the pulping workshop 100 is carried out as follows:

[0100] Organic waste in silo 101 is transferred to conveyor 104 for transport, and metallic impurities are magnetically separated by magnetic separator 105 during the transport process.

[0101] Organic waste is transferred to crusher 106 via conveyor 104 for crushing.

[0102] The organic waste in the crusher 106 is transferred to the bag-breaking screening machine 107 by a shaftless screw conveyor, so as to screen out plastic bags, plastic bottles, bones, glass fragments, ceramic fragments and other debris that are difficult to dissolve in water and are not easy to break in the bag-breaking screening machine 107.

[0103] The organic waste in the bag breaking screening machine 107 is transferred to the pulping and sorting integrated machine 108 by the shaftless screw conveyor, so as to separate mud, sand, glass shards, ceramic shards, long fibers and other impurities that are difficult to dissolve in water and are granular in the pulping and sorting integrated machine 108, and make the organic waste into a slurry containing organic matter.

[0104] The slurry in the pulping and sorting machine 108 is transferred to the press 102 by a shaftless screw conveyor so that the slurry is pressed and filtered out in the press 102.

[0105] The slurry containing organic matter in the press 102 is pumped and transferred to the desander 110 to remove sand, stones, slag or other heavy solid slags that are difficult to dissolve in water.

[0106] The slurry containing organic matter in the desander 110 is pumped and transferred to the homogenizer 109 for cell wall breaking treatment.

[0107] The slurry that has been broken down in the homogenizer 109 is pumped and transferred to the first storage tank 103 for storage.

[0108] In the hydrolysis workshop 200, the preheating tank 203, the hydrolyzer 201, the filter 212, and the second storage tank 202 are arranged in sequence. Thus, the slurry hydrolysis process in the hydrolysis workshop 200 is carried out in the following manner:

[0109] The preheating tank 203 receives the slurry containing organic matter pumped and transferred in the first storage tank 103, and receives the catalyst transferred in the catalyst addition device 204, and the slurry containing organic matter and the catalyst are stirred evenly by the stirring device in the preheating tank 203.

[0110] The organic slurry and catalyst in the preheating tank 203 are pumped and transferred to the hydrolyzer 201.

[0111] Steam generator 210 introduces steam into hydrolyzer 201 to bring the temperature inside hydrolyzer 201 to the hydrolysis temperature. The hydrolysis temperature is the temperature required for the slurry containing organic matter to undergo a hydrolysis reaction, for example, the hydrolysis temperature can be 120℃~130℃.

[0112] Air compressor unit 211 pressurizes the hydrolyzer 201 so that the pressure inside the hydrolyzer 201 reaches the hydrolysis pressure; the hydrolysis pressure is the pressure required for the slurry containing organic matter to undergo a hydrolysis reaction, for example, the hydrolysis pressure can be 0.7 to 0.9 MPa.

[0113] The hydrolyzer 201 is kept at a set temperature and pressure for a preset time to allow the slurry containing organic matter to undergo a hydrolysis reaction in order to obtain a solution containing water-soluble fertilizer. It can be known that after the hydrolysis reaction is completed, the temperature in the hydrolyzer 201 is a hydrolysis temperature of 120℃~130℃, and the pressure in the hydrolyzer 201 is a hydrolysis pressure of 0.7~0.9Mpa. The hydrolyzer 201 is in a high temperature and high pressure state.

[0114] The temperature inside the hydrolyzer 201 is reduced to a third preset temperature, for example, the third preset temperature is less than 50°C. At this time, the pressure inside the hydrolyzer 201 decreases along with the temperature, so that the pressure after depressurization can allow the solution inside the hydrolyzer 201 to be discharged normally.

[0115] The hydrolyzer 201 transfers a solution containing water-soluble fertilizer, specifically including: pumping the solution in the hydrolyzer 201 to the filter 212 to filter out the solid fertilizer in the solution, while the water-soluble fertilizer in the solution is pumped through the filter 212 to the second storage tank 202.

[0116] After the slurry in preheating tank 203 is transferred to hydrolyzer 201, the method further includes:

[0117] The preheating tank 203 receives the slurry containing organic matter pumped and transferred in the first storage tank 103, and receives the catalyst transferred in the catalyst addition device 204, and the slurry containing organic matter and the catalyst are stirred evenly by the stirring device in the preheating tank 203.

[0118] After the hydrolyzer 201 hydrolyzes the slurry into a solution containing water-soluble fertilizer, the method further includes:

[0119] The first control valve 208 is opened and the second control valve 209 is closed, so that the coolant in the coolant tank 207 circulates in the coolant tank 207, the preheating tank 203 and the hydrolyzer 201 under the action of pump circulation. This causes the waste heat in the hydrolyzer 201 to be transferred to the preheating tank 203, thereby reducing the temperature in the hydrolyzer 201 from the hydrolysis temperature to the first preset temperature, and preheating the slurry and catalyst in the preheating tank 203 to the second preset temperature, for example, the first preset temperature is 80-100℃ and the second preset temperature is 50-70℃.

[0120] It can be seen that by using the preheating tank 203 to collect the residual heat generated after the hydrolysis reaction in the hydrolyzer 201, the organic slurry and catalyst in the preheating tank 203 can be preheated to the second preset temperature before the next hydrolysis reaction, thereby reducing the energy consumption of the subsequent hydrolysis reaction.

[0121] Furthermore, lowering the temperature inside the hydrolyzer 201 to the third preset temperature specifically involves:

[0122] The first control valve 208 is disconnected and the second control valve 209 is opened, so that the coolant in the cooling unit 206 reduces the temperature inside the hydrolyzer 201 from the first preset temperature to the third preset temperature. For example, if the third preset temperature is less than 50°C, the pressure inside the hydrolyzer 201 will decrease along with the temperature, so that the pressure after depressurization can allow the solution inside the hydrolyzer 201 to be discharged normally.

[0123] In the emulsification and filling workshop 300, the emulsifier 301, the third storage tank 302, and the metering and filling device 303 are arranged in sequence. Thus, the emulsification process in the emulsification and filling workshop 300 is as follows:

[0124] The water-soluble fertilizer in the second storage tank 202 is pumped to the emulsifier 301 so that the emulsifier 301 can stabilize the water-soluble fertilizer.

[0125] The water-soluble fertilizer in the emulsifier 301 is transferred to the third storage tank 302 for storage.

[0126] The water-soluble fertilizer in the third storage tank 302 is transferred to the metering and filling device 303 so that the metering and filling device 303 fills the water-soluble fertilizer into a finished product according to the preset metering.

[0127] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A production line for organic waste treatment, characterized in that, include: The integrated pulping and sorting machine (108) can turn organic waste into slurry containing organic matter; The slurry in the press (102) and the pulping and sorting machine (108) can be transferred to the press. The press (102) is used to press and filter out the residue; The preheating tank (203) and the hydrolyzer (201) allow the organic slurry in the press (102) to be transferred from the preheating tank (203) to the hydrolyzer (201) and hydrolyzed in the hydrolyzer (201) into a solution containing water-soluble fertilizer. The coolant tank (207), the preheating tank (203), the coolant tank (207) and the hydrolyzer (201) are connected by pipes. When the hydrolyzer (201) completes the hydrolysis reaction, the coolant tank (207) can adjust the temperature inside the hydrolyzer (201) to a first preset temperature and adjust the temperature inside the preheating tank (203) to a second preset temperature. Wherein, the hydrolysis temperature required for the hydrolyzer (201) to complete the hydrolysis reaction is greater than the first preset temperature and the second preset temperature; A cooling unit (206) is connected to the hydrolyzer (201) to adjust the temperature inside the hydrolyzer (201) to a third preset temperature that is lower than the first preset temperature. A catalyst adding device (204) is connected to the preheating tank (203), the catalyst adding device (204) is used to add catalyst to the preheating tank (203), and the hydrolyzer (201) is able to receive the slurry containing organic matter and the catalyst transferred from the preheating tank (203).

2. The production line according to claim 1, characterized in that, The preheating tank (203) is provided with a first cooling coil (2031), and the hydrolyzer (201) is provided with a second cooling coil (2011). The coolant tank (207), the first cooling coil (2031), and the second cooling coil (2011) are connected end to end by pipes; The cooling unit (206) is connected to the second cooling coil (2011).

3. The production line according to claim 2, characterized in that, The preheating tank (203) includes: The tank (2032) is provided with an inlet (2035) for the slurry containing organic matter and the catalyst to enter, and an outlet (2036) connected to the hydrolyzer (201); the first cooling coil (2031) is spirally wound in the tank (2032), and / or, the inner wall of the tank (2032); A stirring paddle (2033) is rotatably disposed in the tank (2032), and the first cooling coil (2031) surrounds the stirring paddle (2033). A motor (2034) mounted on the tank (2032) is connected to the stirring paddle (2033) to drive the stirring paddle (2033) to rotate.

4. The production line according to any one of claims 1 to 3, characterized in that, It also includes a steam generator (210) and an air compressor unit (211) both connected to the hydrolyzer (201). The steam generator (210) is used to introduce steam into the hydrolyzer (201) to adjust the temperature inside the hydrolyzer (201) to the hydrolysis temperature, and the air compressor unit (211) is able to adjust the pressure inside the hydrolyzer (201) to the hydrolysis pressure.

5. The production line according to any one of claims 1 to 3, characterized in that, It also includes a conveyor (104) and a magnetic separator (105). The conveyor (104) is capable of transferring the organic waste to the press (102). The magnetic separator (105) is configured to correspond to the conveyor (104) to screen out ferromagnetic impurities in the organic waste on the conveyor (104).

6. The production line according to claim 5, characterized in that, It also includes a crusher (106) and a bag-breaking screening machine (107); The crusher (106) can receive and crush the organic waste transported by the conveyor (104), and can transport the crushed organic waste to the bag-breaking screening machine (107). The bag-breaking screening machine (107) can transfer the received organic waste to the pulping and sorting machine (108) and screen out the unbroken debris in the transferred organic waste.

7. The production line according to claim 6, characterized in that, It also includes a homogenizer (109), in which the organic slurry in the press (102) can be transferred to the preheating tank (203) after being processed by the homogenizer (109).

8. A method for treating organic waste, characterized in that, The method, employing the production line according to any one of claims 1 to 7, comprises: The pulping and sorting machine (108) turns organic waste into a slurry containing organic matter; The press (102) receives the slurry in the pulping and sorting machine (108) and presses the slurry to filter out the residue; The slurry in the press (102) is transferred to the preheating tank (203); The slurry in the preheating tank (203) is transferred to the hydrolyzer (201); The hydrolyzer (201) hydrolyzes the slurry into a solution containing water-soluble fertilizer; The temperature inside the hydrolyzer (201) is adjusted to a third preset temperature that is lower than the first preset temperature; The hydrolyzer (201) transfers the solution containing the water-soluble fertilizer; After the slurry in the preheating tank (203) is transferred to the hydrolyzer (201), the method further includes: The slurry in the press (102) is transferred to the preheating tank (203); After hydrolyzing the slurry into a solution containing water-soluble fertilizer in the hydrolyzer (201), the method further includes: The coolant in the coolant tank (207) is controlled to circulate in the coolant tank (207), the preheating tank (203) and the hydrolyzer (201) to adjust the temperature in the hydrolyzer (201) to a first preset temperature and to preheat the slurry in the preheating tank (203) to a second preset temperature.

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