Volatile organic waste closed treatment system and volatile organic waste treatment method

Abstract

The invention relates to the field of organic waste treatment, and discloses a volatile organic waste closed treatment system and a volatile organic waste treatment method.The closed treatment system comprises a discharging pump, a buffer tank, a closed conveying pump, a coal slurry pump and a gasification furnace which are sequentially communicated through a pipeline, and the system further comprises a coal water slurry and auxiliary supply unit; the coal-water slurry pump is used for conveying coal-water slurry added with an auxiliary agent to the coal-water slurry pump; wherein the gasification furnace comprises a multi-channel burner with at least four channels. According to the closed treatment system, organic waste is co-treated in a closed high-temperature and high-pressure environment, emission of volatile organic waste is reduced, a gaseous product capable of being comprehensively utilized is obtained through harmless treatment, and the closed treatment system is environmentally friendly and high in conversion efficiency.

Description

Technical Field

[0001] The invention relates to the field of organic waste treatment, and in particular to a closed treatment system for volatile organic waste and a treatment method for volatile organic waste. Background Art

[0002] At present, petrochemical enterprises are developing rapidly, and various production facilities generate more than 1,000 tons of organic waste liquid each year. They are mainly treated by outsourcing, but the cost is high and the difficulty is great. In addition, toxic and harmful substances are prone to leakage during the transportation of organic waste liquid, causing environmental pollution. Most of the existing treatment devices are open-air treatment devices, which are prone to toxic and harmful gas emissions during the organic waste treatment process, which not only pollutes the environment and harms the health and safety of operators, but also affects the treatment equipment and the efficiency of organic waste treatment.

[0003] In order to promote the comprehensive utilization of organic waste and realize the green and environmentally friendly coordinated disposal of organic waste, it is urgent to develop a comprehensive utilization and treatment device and treatment method for organic waste. Summary of the invention

[0004] The purpose of the present invention is to overcome the problems of pollution caused by the volatilization of toxic and harmful substances in the volatile organic waste treatment process in the prior art and the low conversion efficiency of organic waste, and to provide a closed treatment system for volatile organic waste and a treatment method for volatile organic waste. The closed treatment system reduces the emission of volatile organic waste by synergistically disposing of organic waste in a closed high-temperature and high-pressure environment, obtains gaseous products that can be comprehensively utilized through harmless treatment, is green and environmentally friendly, and has high conversion efficiency.

[0005] In order to achieve the above-mentioned object, the first aspect of the present invention provides a closed treatment system for organic waste, wherein the closed treatment system comprises a discharge pump, a buffer tank, a closed delivery pump, a coal slurry pump and a gasifier which are sequentially connected through pipelines, and the system also comprises a water-coal slurry and additive supply unit, which is used to deliver the water-coal slurry with additives to the coal slurry pump;

[0006] Wherein, the gasifier comprises a multi-channel burner having at least 4 channels.

[0007] Preferably, the multi-channel burner has 2n layers of annular walls to form 2n channels, which are formed from the first wall to the 2nth wall in the axial direction from the inside to the outside to form the first channel to the 2nth channel, preferably 2≤n≤6, wherein the first channel is a cylindrical space, and the other channels are annular spaces;

[0008] Wherein, the adjacent channels are respectively introduced with oxidants or mixed solutions.

[0009] The second aspect of the present invention provides a method for treating organic waste, wherein the treatment method is carried out in the system described in the first aspect, and the method comprises the following steps:

[0010] (1) The organic waste with a pH value of 6-9 at the outlet of the buffer tank is pressurized by a closed delivery pump and mixed with a water-coal slurry containing an auxiliary agent in a coal slurry pump to obtain a mixed solution;

[0011] (2) introducing the mixed solution and the oxidant into a gasifier through a multi-channel burner to carry out a gasification reaction to obtain a gaseous product and liquid slag, and then quenching and separating the mixture to obtain a mixed gas and glassy coarse slag.

[0012] Through the above technical solution, the beneficial effects obtained are as follows:

[0013] (1) The closed treatment system provided by the present invention gasifies the organic components in the organic waste at high temperature in a short time and converts them into gaseous products that can be comprehensively utilized. Trace amounts of toxic and harmful substances are fixed in the glassy coarse slag out of the gasification furnace, which can achieve the purpose of green, environmentally friendly and harmless disposal of organic solvents and realize the comprehensive utilization of their own energy;

[0014] (2) In the present invention, preferably, the method for treating volatile organic waste is provided, in which the organic waste is mixed with a water-coal slurry containing an auxiliary agent in a closed treatment system for full reaction, the organic waste conversion rate is high, no toxic or harmful gas is emitted, and the method is suitable for the comprehensive treatment of various types of organic waste in various large-scale production equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the closed system for the treatment of organic waste.

[0016] Description of Reference Numerals

[0017] 1-Discharge pump 2-Buffer tank 3-Enclosed delivery pump

[0018] 4- Closed mixing pipeline 5- Coal slurry pump 6- Burner

[0019] 7-Gasification furnace DETAILED DESCRIPTION

[0020] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0021] A first aspect of the present invention provides a closed treatment system for organic waste, wherein the closed treatment system comprises a discharge pump, a buffer tank, a closed delivery pump, a coal slurry pump and a gasifier which are sequentially connected through pipelines, and the system also comprises a water-coal slurry and additive supply unit for delivering the water-coal slurry with additives to the coal slurry pump;

[0022] Wherein, the gasifier comprises a multi-channel burner having at least 4 channels.

[0023] In the present invention, the closed organic waste treatment system refers to a system in which, except for the gas that must be introduced to maintain the system pressure stability and the smooth reaction, there is no material exchange with the external environment. According to a preferred embodiment of the present invention, in the closed treatment system, the organic waste passes through the unloading pump, the buffer tank, the closed conveying pump, the coal slurry pump and the gasifier in sequence, and the organic waste is conveyed in a closed manner during the treatment process without volatile gas emissions.

[0024] In the present invention, the above-mentioned closed treatment system is used to gasify the organic components in the organic waste in a short time at high temperature and convert them into gaseous products that can be comprehensively utilized. Trace amounts of toxic and harmful substances are fixed in the glassy coarse slag out of the gasification furnace, which can achieve the purpose of green, environmentally friendly and harmless disposal of organic solvents and realize the comprehensive utilization of their own energy.

[0025] According to the present invention, the type of the organic waste is not particularly limited, and can be waste volatile organic waste generated by conventional petrochemical production equipment. Preferably, the organic waste includes at least one of waste sulfolane, waste N-methyldiethanolamine, mixed alcohol and phosphorus-containing waste liquid.

[0026] In the present invention, the water-coal slurry has a conventional definition in the art, and refers to a coal-based liquid fuel obtained by mixing coal, water and optional additives in a certain amount. The source of the water-coal slurry is not particularly limited, as long as it is mixed with organic waste liquid in the form of water-coal slurry, and can be commercially available or prepared by existing technology.

[0027] In the present invention, the unloading pump, buffer tank, closed conveying pump, coal slurry pump, and gasifier have conventional meanings in the field. The unloading pump is used to receive volatile organic waste; the buffer tank is used to control the pH value of the organic waste and preliminarily heat the organic waste; the closed conveying pump is used to pressurize and convey the organic waste at the outlet of the buffer tank to the inlet of the coal slurry pump; the coal slurry pump is used to convey the organic waste, water-coal slurry, and additive mixture to the burner; the burner is used to spray and atomize the oxidant and the mixed solution with good fluidity and stability after mixing at high speed; the gasifier is used to gasify the atomized mixed solution with the oxidant to convert it into gas products and liquid slag.

[0028] According to the present invention, preferably, the pH value of the organic waste in the buffer tank is 6-9, preferably 7-8. In the present invention, controlling the pH value of the organic waste to meet the above range can avoid corrosion of pipelines, equipment and pump body diaphragms.

[0029] In the present invention, the method for controlling the pH value of organic waste is not particularly limited, and the pH value of organic waste meets the above range and is transported to the next unit. When the pH value of organic waste does not meet the above range, the pH value of organic waste can be adjusted by optionally adding acid or alkali, and the amount of added acid or alkali is not particularly limited, and those skilled in the art can adjust it adaptively. According to a preferred embodiment of the present invention, those skilled in the art can mix organic wastes with different pH values ​​so that the pH value of the mixed organic waste meets the above range, as long as the mixed organic wastes do not react with each other.

[0030] According to the present invention, preferably, the organic waste at the outlet of the buffer tank is pressurized by a closed delivery pump and then enters a coal slurry pump to be mixed with water-coal slurry with additives, and after obtaining a mixed solution, it enters a gasifier through a burner for gasification reaction.

[0031] According to the present invention, preferably, the gasifier comprises a multi-channel burner having at least 4 channels, the multi-channel burner having 2n layers of annular walls to form 2n channels accordingly, which are formed from the first wall to the 2nth wall in the axial direction from the inside to the outside to form the first channel to the 2nth channel in sequence, preferably 2≤n≤6, wherein the first channel is a cylindrical space, and the other channels are annular spaces;

[0032] Wherein, the adjacent channels are respectively introduced with oxidants or mixed solutions.

[0033] According to the present invention, preferably, the burner is a gasification burner disclosed in CN114085685A. Preferably, the burner is a four-channel burner, through which the mixed solution and the oxidant are respectively transported through at least two channels.

[0034] According to a preferred embodiment of the present invention, the burner adopts a pre-film burner and an external mixing type. The oxidant flow entering the burner is divided into two flow channels, the first channel (secondary oxygen) is located in the center, the third channel (primary oxygen) is located outside, the second channel is located between the first and third channels, that is, the inner coal slurry channel, and the fourth channel at the outermost side is the outer coal slurry channel. Four streams of logistics eject the burner, and the inner and outer sides of the inner coal slurry channel are high-speed flowing oxygen streams, and the oxygen stream in the center channel accounts for 10-25% of the total oxygen volume, and has a certain intersection angle with the coal slurry; the oxygen stream atomizes the coal slurry by means of impact, vibration, etc.

[0035] In the present invention, the process goal of the burner is to achieve the goal of atomizing the coal slurry through momentum exchange between the oxygen flow and the coal slurry flow, creating conditions for the combustion and gasification process in the furnace. The multi-channel burner is more conducive to thinning the flow layer of the mixed solution entering the furnace, and atomizing it to the greatest extent through high-speed collision and vibration of the oxygen flow through the central channel and the outer channel, so that it is fully gasified and burned with the oxygen component in the furnace, thereby improving the conversion rate of organic waste.

[0036] In the present invention, the method of introducing the organic waste into the discharge pump is not particularly limited, as long as the organic waste is introduced into the discharge pump by closed conveying. According to a preferred embodiment of the present invention, the waste volatile organic waste generated by various production devices is transported to the discharge pump by a closed tank truck.

[0037] According to the present invention, preferably, the oxidant is an oxygen-containing atmosphere, wherein the volume percentage of oxygen in the oxygen-containing atmosphere is greater than or equal to 99.6%, preferably 99.6-99.8%.

[0038] According to the present invention, preferably, the system further comprises a pressure control device for maintaining the system pressure in a slightly positive pressure state, and controlling the system pressure from the discharge pump to the inlet of the coal slurry pump. In the present invention, the slightly positive pressure state has a conventional interpretation in the art, which means that the system pressure is slightly higher than the standard atmospheric pressure, and preferably, the system pressure is 200-400 Pa higher than the standard atmospheric pressure.

[0039] In the present invention, the system pressure is maintained in a slightly positive pressure state, which can avoid damage to equipment caused by pressure changes due to factors such as volatilization of organic waste and changes in the liquid level of the buffer tank in a closed system. Preferably, the system pressure is maintained in a slightly positive pressure state by introducing nitrogen and controlling the amount of nitrogen introduced.

[0040] According to the present invention, preferably, the system further comprises a temperature control device for maintaining the system temperature not lower than 40°C, preferably not lower than 50°C. The temperature control device is not particularly limited, and controls the system temperature from the discharge pump to the inlet of the coal slurry pump, and can maintain the system temperature to meet the limit. In the present invention, maintaining the system temperature not lower than 40°C can make the organic waste have a lower viscosity and good fluidity.

[0041] According to the present invention, preferably, the system further comprises a chilling separation device for separating the gaseous product and the liquid slag obtained by the gasification reaction. In the present invention, the chilling separation device is not particularly limited and can be a conventional chilling separation device in the art, as long as it can separate the gasification reaction product.

[0042] In the present invention, the gaseous product and liquid slag obtained by the gasification reaction are separated by a quenching separation device to obtain a mixed gas and a glassy coarse slag. The mixed gas is CO and CO 2 / or H2 , preferably CO and H 2 .

[0043] In the present invention, the glassy coarse slag has the conventional definition in the art, and refers to the solid product obtained by the gasification reaction, which can be used in the fields of road construction, building materials, etc. after being processed.

[0044] The second aspect of the present invention provides a method for treating organic waste, wherein the treatment method is carried out in the system described in the first aspect, and the method comprises the following steps:

[0045] (1) The organic waste with a pH value of 6-9 at the outlet of the buffer tank is pressurized by a closed delivery pump and mixed with a water-coal slurry containing an auxiliary agent in a coal slurry pump to obtain a mixed solution;

[0046] (2) introducing the mixed solution and the oxidant into a gasifier through a multi-channel burner to carry out a gasification reaction to obtain a gaseous product and liquid slag, and then quenching and separating the mixture to obtain a mixed gas and glassy coarse slag.

[0047] In the present invention, the system described in the first aspect is used to treat volatile organic wastes, and mixing, gasification reaction and quenching separation are carried out in a closed system. The organic waste conversion rate is high, and no toxic or harmful gas is emitted. It is suitable for the comprehensive treatment of various types of organic wastes in various large-scale production equipment.

[0048] According to the present invention, the auxiliary agent can increase the hydrophilicity of organic waste, reduce the viscosity of organic waste, and improve the stability and fluidity of organic waste. Preferably, the auxiliary agent is selected from at least one of sodium lignin sulfonate, naphthalene sulfonate copolymer, methylene naphthalene sulfonate, styrene sulfonate, maleic acid and naphthalene-based concrete water reducer.

[0049] According to the present invention, preferably, the mass ratio of the organic waste to water and additive is 1:(0-8):(0.13-0.6), preferably 1:(1-6):(0.15-0.5), and more preferably 1:(2-6):(0.3-0.5).

[0050] According to the present invention, preferably, the mass ratio of the organic waste to the water-coal slurry is 1:120-600, for example, 1:120, 1:130, 1:140, 1:150, 1:170, 1:200, 1:250, 1:300, 1:350, 1:400, 1:450, 1:500, 1:550, 1:600, or any range between the two, preferably 1:150-350.

[0051] In the present invention, the organic waste is mixed with the water-coal slurry, the additive and water according to the above mass ratio, and the obtained mixed solution has good fluidity and stability. When mixed with the oxidant in the gasification reaction, the combustion and gasification are more complete, and the organic waste conversion rate is high. According to a preferred embodiment of the present invention, the additive is first mixed with the water-coal slurry to obtain the water-coal slurry with the additive, which is helpful for subsequent mixing with the organic waste and further improving the organic waste conversion rate.

[0052] According to the present invention, preferably, step (1) also includes a process of pre-treating the organic waste and then mixing it.

[0053] In the present invention, preferably, the pretreatment conditions include: in the buffer tank, adjusting the pH of the organic waste to 6-9, adjusting the temperature of the organic waste through the buffer tank heating coil to reduce the viscosity of the organic waste liquid and ensure that it has good fluidity.

[0054] The present invention also includes a process for flushing the organic waste at the outlet of the closed delivery pump. When the equipment fails and is handed over for maintenance, the organic waste pipeline and equipment are flushed, and the diluted waste liquid is transported to the coal slurry pump and mixed with the water-coal slurry and water with additives.

[0055] According to the present invention, preferably, the viscosity of the mixed solution in the coal slurry pump in step (1) is 500-1300mPa·s, such as 500mPa·s, 600mPa·s, 700mPa·s, 800mPa·s, 900mPa·s, 1000mPa·s, 1100mPa·s, 1200mPa·s, 1300mPa·s, or any range between the two, preferably 600-1000mPa·s. In the present invention, the viscosity of the mixed solution is measured by a rotational viscometer at a test temperature of 20°C.

[0056] According to the present invention, preferably, the mixed solution in the coal slurry pump in step (1) is kept for more than 24 hours without sedimentation or agglomeration. In the present invention, the mixed solution has good stability.

[0057] According to the present invention, preferably, the oxidant is an oxygen-containing gas. The oxidant is described in the above description and will not be repeated here. According to the present invention, preferably, the amount of the oxidant added is calculated as oxygen, and the volume ratio of the oxidant to the mixed solution is 460-550, preferably 470-490. The volume of the mixed solution refers to the total volume of the mixed solution.

[0058] According to the present invention, preferably, the gasification reaction is carried out in a gasifier, and the conditions of the gasification reaction include: reaction temperature of 1150-1350°C, preferably 1170-1250°C; reaction pressure of 5-6.75MPa, preferably 5.5-6.3MPa; reaction time of 1-8s, preferably 3-7s.

[0059] According to the present invention, preferably, the method further comprises chilling and separating the gasification reaction product in a chilling and separation device, and the chilling and separation conditions comprise: chilling the gasification reaction product to 200-260° C. within 1-3 seconds to obtain a mixed gas and glassy coarse slag.

[0060] According to the present invention, preferably, the mixed gas is CO and CO 2 / or H 2 , preferably CO and H 2 .

[0061] In the present invention, the above-mentioned method for treating organic waste can be used to harmlessly treat various organic wastes, and the organic waste conversion rate is high. The mixed gas and glassy coarse slag obtained by treatment can be further comprehensively utilized as resources, which can meet the current demand for organic waste treatment in the petrochemical field.

[0062] According to a preferred embodiment of the present invention, the method for treating organic waste comprises:

[0063] according to Figure 1 As shown in the schematic diagram, the organic waste is transported to the buffer tank 2 by the discharge pump 1 for buffering. The pH value of the organic waste in the buffer tank 2 is adjusted to 6-9. The system is kept in a slightly positive pressure state by the pressure control device (not shown in the figure), and the system temperature is kept not lower than 40°C by the temperature control device (not shown in the figure). The organic waste in the buffer tank 2 is pressurized by the closed delivery pump 3, and the water introduced by the water-coal slurry and auxiliary agent supply unit (not shown in the figure) and the water-coal slurry with auxiliary agents are mixed in the coal slurry pump 5 through the closed mixing pipe 4 to obtain a mixed solution. The mixed solution in the coal slurry pump 5 is introduced into the gasifier 7 through the burner 6, and the oxidant is introduced into the gasifier 7 through the burner 6 to perform a gasification reaction. The product of the gasification reaction is quenched and separated by a quenching separation device (not shown in the figure).

[0064] The present invention will be described in detail below through examples and comparative examples.

[0065] Unless otherwise specified, all reagents used in the present invention are commercially available.

[0066] Example 1

[0067] (1) According to Figure 1The schematic diagram shown in the figure processes organic waste. 10t of waste sulfolane solution is introduced through the discharge pump 1 and transported to the buffer tank 2. The pH value is 8.7. After being pressurized by the closed delivery pump 3, it is sent to the inlet of the coal slurry pump 5 at 0.2t / h through the closed mixing pipe 4. It is mixed with 61t / h of water-coal slurry (with 1.1t / h of sodium lignin sulfonate (8wt% concentration)) in the coal slurry pump 5. The viscosity of the mixed solution is 920mPa·s. The closed system temperature from the discharge pump 1 to the inlet of the coal slurry pump 5 is maintained at 50°C by the temperature control device, and the system pressure from the discharge pump 1 to the inlet of the coal slurry pump 5 is maintained at a slightly positive pressure state by the pressure control device.

[0068] (2) The mixed solution and the oxidant are introduced into the gasifier 7 through the burner 6. The burner is the four-channel burner of Example 1 in CN114085685A. The oxidant is introduced through the first channel and the third channel. The volume content of oxygen in the oxidant in the first channel accounts for 18% of the total volume of oxygen. The mixed solution is introduced through the second channel and the fourth channel. The oxygen-containing gas is introduced at a volume ratio of oxygen to the mixed solution of 4:75 to carry out a gasification reaction. The conditions of the gasification reaction include: a reaction temperature of 1225°C, a reaction pressure of 6.0 MPa, and a reaction time of 6 s.

[0069] (3) The gasification reaction product is quenched to 225°C within 2 seconds to separate CO and H 2 Mixed gas and glassy coarse slag.

[0070] Example 2

[0071] (1) According to Figure 1 The schematic diagram shown in the figure processes organic waste. 10 tons of N-methyldiethanolamine waste liquid is introduced through the discharge pump 1 and transported to the buffer tank 2 for pretreatment. The pH value is 8.4. After being pressurized by the closed delivery pump 3, it is sent to the inlet of the coal slurry pump 5 at 0.2 t / h through the closed mixing pipe 4, and mixed with 60 t / h of water-coal slurry (with 1.07 t / h of sodium lignin sulfonate (8 wt% concentration)) in the coal slurry pump 5. The viscosity of the mixed solution is 880 mPa·s. The closed system temperature from the discharge pump 1 to the inlet of the coal slurry pump 5 is maintained at 50°C by the temperature control device, and the system pressure from the discharge pump 1 to the inlet of the coal slurry pump 5 is maintained at a slightly positive pressure state by the pressure control device.

[0072] (2) The mixed solution and the oxidant are introduced into the gasifier 7 through the burner 6. The burner is a four-channel burner of Example 1 in CN114085685A. The oxidant is introduced through the first channel and the third channel. The volume content of oxygen in the oxidant in the first channel accounts for 18% of the total volume of oxygen. The mixed solution is introduced through the second channel and the fourth channel. The oxygen-containing gas is introduced with a volume ratio of oxygen to carbon in the organic waste mixed solution of 4:7:6 to carry out a gasification reaction. The conditions of the gasification reaction include: a reaction temperature of 1240°C, a reaction pressure of 5.9 MPa, and a reaction time of 7 seconds.

[0073] (3) The gasification reaction product is quenched to 227°C within 2 seconds to separate CO and H 2 Mixed gas and glassy coarse slag.

[0074] Example 3

[0075] The organic waste was treated according to the method of Example 1, except that the pH value was 10.7.

[0076] Example 4

[0077] The organic waste was treated according to the method of Example 1, except that the conditions of the gasification reaction were changed to a reaction temperature of 1320° C., a reaction pressure of 5.6 MPa, and a reaction time of 5 s.

[0078] Example 5

[0079] The organic waste was treated according to the method of Example 1, except that the amount of each substance added was changed to 0.65 t / h sodium lignin sulfonate (8 wt % concentration) as the additive, and the viscosity of the mixed solution was 1400 mPa·s.

[0080] Comparative Example 1

[0081] The organic waste was treated according to the method of Example 1, except that the burner in the gasifier was a three-channel burner, and the mixed solution was introduced into the middle channel. Other conditions were the same as in Example 1.

[0082] Comparative Example 2

[0083] The organic waste is treated according to the method of Example 1, except that the discharge pump, the buffer tank and the delivery pump are all open-air devices.

[0084] The treatment effect of the closed organic waste treatment system of the present invention is shown in Table 1.

[0085] Table 1

[0086]

[0087]

[0088] It can be seen from the results in Table 1 that according to the organic waste treatment method provided in the embodiment of the present invention, the organic waste conversion rate is higher, and the proportion of CO in the treated mixed gas is higher. The pH of the organic waste in Example 3 is relatively high, which will accelerate the aging and leakage of the delivery pump diaphragm. The viscosity of the organic waste mixed liquid in Example 5 is relatively high, the fluidity is poor, the system pipeline is prone to blockage, and the operation stability is poor. Comparative Example 2 is an open-air device, the on-site mixing odor is large, the environmental pollution is serious, the on-site occupational health does not meet the standards, the combustion calorific value of the organic waste and water-coal slurry is reduced after mixing with impurities such as rainwater, and the organic waste conversion rate is reduced.

[0089] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A closed system for treating organic waste, It is characterized in that The closed processing system includes a discharge pump, a buffer tank, a closed delivery pump, a coal slurry pump and a gasifier which are sequentially connected through pipelines, and the system also includes a water-coal slurry and additive supply unit for delivering the water-coal slurry with additives to the coal slurry pump; Wherein, the gasifier comprises a multi-channel burner having at least 4 channels.

2. The system according to claim 1, in, The organic waste includes at least one of waste sulfolane, waste N-methyldiethanolamine, mixed alcohol and phosphorus-containing waste liquid; Preferably, the pH value of the organic waste in the buffer tank is 6-9, preferably 7-8; Preferably, the organic waste at the outlet of the buffer tank is pressurized by a closed delivery pump and then enters a coal slurry pump to be mixed with water-coal slurry with additives, and after obtaining a mixed solution, it enters a gasifier through a burner for gasification reaction.

3. The system according to claim 1 or 2, in, The multi-channel burner has 2n layers of annular walls to form 2n channels, which are formed from the first wall to the 2nth wall in the axial direction from the inside to the outside to form the first channel to the 2nth channel, preferably 2≤n≤6, wherein the first channel is a cylindrical space, and the other channels are annular spaces; Wherein, adjacent channels are respectively introduced with oxidants or mixed solutions; Preferably, the oxidant is an oxygen-containing atmosphere.

4. A system according to any one of claims 1 to 3, in, The system also includes a pressure control device for maintaining the system pressure in a slightly positive pressure state; Preferably, the system further comprises a temperature control device for maintaining the system temperature not lower than 40°C, preferably not lower than 50°C; Preferably, the system further comprises a quenching separation device for separating the gaseous product and liquid slag obtained from the gasification reaction.

5. A method for treating organic waste, It is characterized in that The processing method is carried out in a system according to any one of claims 1 to 4, and the method comprises the following steps: (1) The organic waste with a pH value of 6-9 at the outlet of the buffer tank is pressurized by a closed delivery pump and mixed with a water-coal slurry containing an auxiliary agent in a coal slurry pump to obtain a mixed solution; (2) introducing the mixed solution and the oxidant into a gasifier through a multi-channel burner to carry out a gasification reaction to obtain a gaseous product and liquid slag, and then quenching and separating the mixture to obtain a mixed gas and glassy coarse slag.

6. The method according to claim 5, in, The auxiliary agent is selected from at least one of sodium lignin sulfonate, naphthalene sulfonate copolymer, methylene naphthalene sulfonate, styrene sulfonate, maleic acid and naphthalene-based concrete water reducer; Preferably, the mass ratio of the organic waste to water and the auxiliary agent is 1:(0-8):(0.13-0.6), preferably 1:(1-6):(0.15-0.5); Preferably, the mass ratio of the organic waste to the water-coal slurry is 1:120-600, preferably 1:150-350.

7. The method according to claim 5 or 6, in, Step (1) also includes a process of pre-treating the organic waste and then mixing it; Preferably, the viscosity of the mixed solution in the coal slurry pump in step (1) is 500-1300 mPa·s, preferably 600-1000 mPa·s; Preferably, the mixed solution in the coal slurry pump in step (1) is kept for more than 24 hours without settling or agglomeration.

8. The method according to any one of claims 5 to 7, in, The oxidant is an oxygen-containing atmosphere; Preferably, the amount of the oxidant added is calculated as oxygen, and the volume ratio of the oxidant to the mixed solution is 460-550, preferably 470-490.

9. The method according to any one of claims 5 to 8, in, The conditions of the gasification reaction include: reaction temperature of 1150-1350° C., preferably 1170-1250° C.; reaction pressure of 5-6.75 MPa, preferably 5.5-6.3 MPa; reaction time of 1-8 s, preferably 3-7 s.

10. The method according to any one of claims 5 to 9, in, The method further comprises chilling and separating the gasification reaction product in a chilling and separation device, wherein the chilling and separation conditions include: chilling the gasification reaction product to 200-260° C. within 1-3 seconds to obtain a mixed gas and glassy coarse slag; Preferably, the mixed gas is CO and CO 2 / or H 2 , preferably CO and H 2 .

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