Device and method for decontamination and recycling of organic waste liquid

Abstract

The present invention provides a device for decomposing and reusing organic waste liquid, which comprises: an organic waste liquid tank; a gas-liquid separator, which comprises an organic waste liquid inlet, a gas outlet and a liquid outlet, and the gas-liquid separator is used for vacuum distillation or distillation; wherein the organic waste liquid inlet is connected to the organic waste liquid tank and receives the organic waste liquid from the organic waste liquid tank; furthermore, the gas outlet discharges the gas after vacuum distillation or distillation, and the liquid outlet discharges the liquid after vacuum distillation or distillation; a high-temperature cracking and recombining device, which receives the gas after vacuum distillation or distillation and performs cracking and recombining reaction to produce cracking gas. The organic waste liquid decomposition and reusing device of the present invention can decompose organic waste liquid; and can separate organic compounds with recycling value in the organic waste liquid, and provide them to the high-temperature cracking and recombining device for cracking and hydrogen production, so as to achieve the effect of fully utilizing the organic waste liquid as a resource.

Description

Technical Field

[0001] The invention relates to a device and method for dechemical recycling of organic waste liquid. Background Art

[0002] Organic waste liquid is a common waste in general industrial production processes. For example, organic waste liquid containing high boiling point organic compounds (such as catechol) in the semiconductor industry.

[0003] The organic waste liquid is usually treated by combustion or biological oxidation. When the organic waste liquid is treated by high temperature pyrolysis and recombination, if it is not treated additionally, some problems may occur due to the components in the organic waste liquid.

[0004] For example, at high temperatures, catechol is prone to coking and forming phenol tar, which can cause pipe clogging and poisoning of catalysts, thereby shortening the life of industrial production equipment. Therefore, in order to avoid shortening the life of industrial production equipment, it is necessary to perform additional treatment on the above-mentioned organic waste liquid.

[0005] As for the technology of additional treatment of organic waste liquid, a thermal treatment technology through thermal cracking has been proposed. By thermally treating the organic waste liquid, the toxicity of the organic waste liquid can be reduced. Summary of the invention

[0006] However, if only high-boiling-point organic compounds (such as catechol) are heat-treated, the removal (removal, conversion) of high-boiling-point organic compounds is still insufficient. At the same time, since many organic components in organic waste liquid are still worth recycling, if they are directly processed into carbon by heat treatment, the resources in the organic waste liquid are not fully reused.

[0007] In order to solve the above problems, an organic waste liquid decomposition and recycling device according to an embodiment of the present invention comprises: an organic waste liquid tank, which is used to store organic waste liquid; a gas-liquid separator, which includes an organic waste liquid inlet, a gas outlet and a liquid outlet, and the gas-liquid separator is used to perform vacuum distillation or distillation; wherein the organic waste liquid inlet is connected to the organic waste liquid tank and receives the organic waste liquid from the organic waste liquid tank; further, the gas outlet discharges the gas after vacuum distillation or distillation, and the liquid outlet discharges the liquid after vacuum distillation or distillation; a high-temperature cracking and recombining device receives the gas after vacuum distillation or distillation, and performs cracking and recombining reactions to produce cracked gas.

[0008] In an embodiment, the device for decomposing and reusing organic waste liquid further comprises: a filtering device connected to the liquid outlet; and a furnace connected to the filtering device and the high-temperature cracking recombinator.

[0009] In an embodiment, the device for decomposing and reusing organic waste liquid further comprises: an ion removal tower, which is connected to the gas outlet and sends the gas after ion removal to the high-temperature cracking recombinator.

[0010] In an embodiment, the device for decomposing and reusing organic waste liquid further comprises: a heat exchanger, which is connected to the ion removal tower and is used to perform heat exchange on the gas after ion removal before sending it into the high-temperature cracking recombiner.

[0011] In an embodiment, the device for decomposing and reusing organic waste liquid further comprises: an RO water machine, which supplies RO water to the gas-liquid separator.

[0012] In an embodiment, the device for decomposing and reusing organic waste liquid further comprises: a heat source, which controls the temperature of the gas-liquid separator to 50-300° C.; and a vacuum pump, which controls the vacuum degree of the gas-liquid separator to 40-101 KPa.

[0013] In an embodiment, the gas-liquid separator comprises a cavity, and the cavity is an integrated type or a separated type, and a stirring device is provided at the bottom of the cavity.

[0014] In order to solve the above problems, the method for decomposing and reusing organic waste liquid according to the embodiment of the present invention comprises: (a) providing the organic waste liquid to a gas-liquid separator; (b) performing vacuum distillation or distillation on the organic waste liquid in the gas-liquid separator at a temperature of 50 to 300° C. and a vacuum degree of 40 to 101 KPa; (c) providing the gas after vacuum distillation or distillation to a high-temperature cracking recombinator; (d) performing cracking and recombination reaction in the high-temperature cracking recombinator to produce cracking gas.

[0015] In an embodiment, the method for decomposing and reusing organic waste liquid further comprises: step (e), wherein the liquid after vacuum rectification or distillation is provided to the furnace through a filtering device to serve as an auxiliary fuel.

[0016] Furthermore, in an embodiment, in the step (c), the gas after vacuum rectification or distillation is first subjected to ion removal and then provided to a high temperature cracking recombiner.

[0017] Furthermore, in the embodiment, in the step (c), the gas after ion removal is subjected to heat exchange and then provided to the high temperature cracking reformer.

[0018] Furthermore, in the embodiment, in the step (a), the organic waste liquid and the RO water are provided to a gas-liquid separator.

[0019] Furthermore, in the embodiment, in the step (a), the weight ratio of RO water to organic waste liquid is 2-4:1.

[0020] Furthermore, in the embodiment, in the step (e), the liquid after vacuum rectification or distillation is provided to the furnace at a fixed flow rate, and the supply amount of the organic waste liquid is adjusted in conjunction with the demand for cracking gas.

[0021] Furthermore, in the embodiment, in the step (c), ion removal is performed at 25-300°C.

[0022] The embodiment of the present invention is completed in view of the above-mentioned known problems, and its purpose is to provide a device for the decomposition and reuse of organic waste liquid, which can separate organic compounds with recycling value from the organic waste liquid by vacuum distillation or distillation through a gas-liquid separator, and provide them to a high-temperature cracking recombiner for cracking and hydrogen production, so as to achieve the effect of fully utilizing the organic waste liquid as a resource.

[0023] An embodiment of the present invention provides a method for decomposing and reusing organic waste liquid, which can separate waste in the organic waste liquid by performing vacuum distillation or distillation and high-temperature cracking and recombination reactions, reduce coking and pipeline blockage, and achieve the effect of extending the life of industrial production equipment and fully utilizing the organic waste liquid as a resource. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of an organic waste liquid decomposition and recycling device according to Example 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of an organic waste liquid decomposition and recycling device according to Example 2 of the present invention;

[0026] Figure 3 This is a schematic diagram of an organic waste liquid decomposition and recycling device according to Example 3 of the present invention;

[0027] Figure 4 A flow chart of an example of the method for decomposing and reusing organic waste liquid according to the present invention;

[0028] Figure 5 A flow chart of another example of the method for decomposing and reusing organic waste liquid according to the present invention;

[0029] Figure 6 This is a chromatogram of the base peak before and after vacuum distillation separation of the organic waste liquid confirmed by HPLC.

[0030] [Reference Signs]

[0031] 1 Organic waste liquid tank

[0032] 2 Gas-liquid separator

[0033] 21 Organic waste liquid inlet

[0034] 22 Gas outlet

[0035] 23 Liquid outlet

[0036] 3. High temperature cracking recombiner

[0037] 4 Filtration device

[0038] 5. Stove

[0039] 6 RO water machine

[0040] 7 Ion removal tower

[0041] 8 Heat exchanger

[0042] 100,200,300 Organic waste liquid decomposition and recycling device

[0043] Steps (a) to (e) DETAILED DESCRIPTION

[0044] Device for decomposing and reusing organic waste liquid

[0045] Example 1

[0046] First, please refer to Figure 1 , Figure 1 FIG. 1 is a schematic diagram of an organic waste liquid decomposition and recycling device 100 according to Example 1 of the present invention. Figure 1 As shown, the present invention provides an organic waste liquid decomposition and recycling device 100, which includes: an organic waste liquid tank 1, a gas-liquid separator 2 and a high-temperature cracking recombinator 3.

[0047] The organic waste liquid tank 1 is used to store organic waste liquid, and the volume of the organic waste liquid tank 1 can be appropriately selected. In addition, the organic waste liquid is not particularly limited, and can be organic waste liquid from a semiconductor factory. Generally speaking, the organic waste liquid mainly contains alcohol amines, acids and phenolic compounds.

[0048] Furthermore, the gas-liquid separator 2 includes an organic waste liquid inlet 21, a gas outlet 22 and a liquid outlet 23; wherein the organic waste liquid inlet 21 is connected to the organic waste liquid tank 1 and receives the organic waste liquid from the organic waste liquid tank 1; further, the gas outlet 22 discharges the gas after vacuum distillation or distillation, and the liquid outlet 23 discharges the liquid after vacuum distillation or distillation.

[0049] In general, the gas after vacuum rectification or distillation usually contains compounds such as alcoholamines, and the liquid after vacuum rectification or distillation usually contains compounds with high boiling points such as acids and phenols. In addition, in Example 1, the use of the liquid after vacuum rectification or distillation is not particularly limited, and it can be discarded / abandoned, or treated as in Example 2 described later.

[0050] Next, the operating conditions of the vacuum distillation or distillation can be appropriately selected according to the composition of the organic waste liquid. Generally, it can be carried out at a temperature range of 50 to 300° C. and a vacuum degree of 40 to 101 KPa. In addition, the temperature range is preferably 150 to 200° C. and the vacuum degree is preferably 50 to 80 KPa.

[0051] The temperature in the gas-liquid separator 2 can be controlled within the above range by a temperature-controllable heat source (not shown). The heat source may be, for example, an electric heating element or hot kerosene, without particular limitation. In addition, the vacuum degree may be controlled within the above range by a vacuum pump (not shown).

[0052] The gas-liquid separator 2 is not particularly limited as long as it has a function of performing vacuum rectification or distillation to separate liquid from gas, and may be, for example, a known vacuum rectification device or distillation device.

[0053] In a preferred embodiment, the gas-liquid separator 2 includes a cavity, and the cavity is an integrated or separated type, and a stirring device is provided at the bottom of the cavity. By providing a stirring device at the bottom of the cavity, it is possible to reduce the tendency of the liquid after vacuum rectification or distillation to be easily coked due to stagnation.

[0054] Next, the high temperature cracking and reforming device 3 is used to receive the gas after vacuum rectification or distillation, and perform cracking and reforming reaction to produce cracked gas, and then crack the cracked gas to produce hydrogen. As for the operating conditions of the cracking and reforming reaction, it can be operated at a temperature of 650 to 700° C., and a catalyst of a metal alloy such as Fe-Co-Ni alloy can be used.

[0055] Furthermore, the high temperature cracking and reforming device 3 is not particularly limited as long as it can perform high temperature cracking and reforming reaction to produce cracked gas, and may be, for example, a plasma cracking and reforming reactor, a reactor containing a cracking and hydrogen production catalyst, and the like.

[0056] In addition, a vacuum pump may be connected to the cracked gas outlet of the high-temperature cracking reformer 3 to further transport the cracked gas. Alternatively, the cracked gas may be directly transported without connecting a vacuum pump.

[0057] In this way, by performing vacuum distillation or distillation through the organic waste liquid decomposition and recycling device 100 of Example 1 of the present invention, waste (such as acids and phenols and other compounds with higher boiling points) in the organic waste liquid can be separated, coking and pipeline blockage can be reduced, and the life of industrial production equipment can be extended.

[0058] Furthermore, through the organic waste liquid decomposition and recycling device 100 of Example 1 of the present invention, organic compounds (such as amines) with recycling value in the organic waste liquid can be separated and provided to the high-temperature cracking recombiner 3 for cracking and hydrogen production, so as to achieve the effect of fully utilizing the organic waste liquid as a resource.

[0059] Example 2

[0060] Next, please refer to Figure 2 , Figure 2 FIG. 2 is a schematic diagram of an organic waste liquid decomposition and recycling device 200 according to Example 2 of the present invention. Figure 2 As shown, the present invention provides an organic waste liquid decomposition and recycling device 200, which includes: an organic waste liquid tank 1, a gas-liquid separator 2, a high-temperature cracking recombinator 3, a filtering device 4 and a furnace 5.

[0061] Among them, the organic waste liquid tank 1, gas-liquid separator 2 and high-temperature cracking recombiner 3 are the same as those of Example 1, so they are given the same symbols and their description is omitted.

[0062] In addition, in Example 2 of the present invention, the subsequent treatment is mainly performed on the liquid after vacuum rectification or distillation. This is because the liquid after vacuum rectification or distillation usually mainly contains organic compounds with a high boiling point and has a high residual calorific value. Therefore, in order to further utilize its residual calorific value, in Example 2, the liquid after vacuum rectification or distillation is first treated by the filtering device 4, and then provided to the furnace 5 as an auxiliary fuel.

[0063] Furthermore, the filtering device 4 is connected to the liquid outlet 23 of the gas-liquid separator 2 to receive the liquid after vacuum rectification or distillation. As far as the filtering device 4 is concerned, it is not particularly limited as long as it can filter impurities in the liquid. In addition, the liquid after vacuum rectification or distillation can be directly sent to the furnace 5 without filtering to utilize its residual calorific value.

[0064] Then, if Figure 2 As shown, the furnace 5 is connected to the filter device 4 and the high-temperature cracking recombiner 3. The furnace 5 receives the liquid flowing through the filter device 4, and then uses the vacuum distillation or distilled liquid as an auxiliary fuel and burns it together with fuel (such as methanol or natural gas) to provide heat energy to the high-temperature cracking recombiner 3. In a specific example, the combustion temperature of the furnace can be 750-850°C. Thus, the residual calorific value of the vacuum distillation or distilled liquid can be used for combustion heating to reduce fuel loss and reduce costs.

[0065] In a preferred embodiment, the liquid after vacuum rectification or distillation of the filtering device 4 is provided to the furnace 5 at a fixed flow rate, and the supply amount of the organic waste liquid in the organic waste liquid tank 1 is adjusted in conjunction with the demand amount of the cracking gas to be produced in the high-temperature cracking recombiner 3. In this way, a dynamic balance between the demand amount of the cracking gas and the supply amount of the organic waste liquid can be achieved, thereby realizing automated continuous operation.

[0066] Example 3

[0067] Next, please refer to Figure 3 , Figure 3 FIG. 3 is a schematic diagram of an organic waste liquid decomposition and recycling device 300 according to Example 3 of the present invention. Figure 3 As shown, the present invention provides an organic waste liquid decomposition and recycling device 300, which includes: an organic waste liquid tank 1, a gas-liquid separator 2, a high-temperature cracking recombiner 3, a filtering device 4, a furnace 5, a RO water (reverse osmosis water) machine 6, an ion removal tower 7 and a heat exchanger 8.

[0068] Among them, the parts about the organic waste liquid tank 1, the gas-liquid separator 2, the high-temperature cracking recombinator 3, the filtering device 4 and the furnace 5 are the same as the organic waste liquid tank 1, the gas-liquid separator 2, the high-temperature cracking recombinator 3, the filtering device 4 and the furnace 5 of Example 2, so they are given the same symbols and their descriptions are omitted.

[0069] In the embodiment 3 of the present invention, the gas after vacuum distillation or distillation by the gas-liquid separator 2 is further treated by reducing the ion concentration by the ion removal tower 7 and heat exchange by the heat exchanger 8; and this can make the gas after vacuum distillation or distillation more conducive to the high-temperature cracking and recombination reaction by the high-temperature cracking and recombination unit 3. In addition, the RO water provided by the RO water machine 6 can increase the hydrogen production by cracking and hydrogen production.

[0070] Furthermore, the RO water machine 6 is connected to the gas-liquid separator 2 to supply RO water to the gas-liquid separator 2. There is no particular limitation on the RO water machine 6. Furthermore, the supply ratio of RO water can be adjusted according to the demand for hydrogen production by cracking. In an embodiment, the weight ratio of RO water to organic waste liquid is 0 to 9:1, and preferably 2 to 4:1.

[0071] Next, the ion removal tower 7 is connected to the gas outlet 22 of the gas-liquid separator 2 to receive the gas after vacuum distillation or distillation. In the ion removal tower 7, the concentration of ions in the gas is reduced (for example, the concentration of fluorine ions is reduced) to improve the purity of the gas after vacuum distillation or distillation as a raw material for high-temperature cracking and recombination reaction, making it more conducive to high-temperature cracking and recombination reaction. The ion removal tower 7 sends the gas after ion removal to the high-temperature cracking and recombination device 3.

[0072] The ion removal tower 7 is not particularly limited and can be appropriately selected according to the ions to be removed. In addition, sampling ports can be provided before and after the ion removal tower 7 to confirm the ion concentration and pH value of the solution containing the ions to be removed.

[0073] The temperature range for ion removal is generally 25 to 300°C, preferably 50 to 150°C.

[0074] Next, before the ion-removed gas enters the pyrolysis recombiner 3, the ion-removed gas can be heat exchanged by the heat exchanger 8 to facilitate the reaction in the pyrolysis recombiner 3. The heat exchanger 8 is connected to the ion removal tower 7, and performs heat exchange on the ion-removed gas before sending it to the pyrolysis recombiner 3.

[0075] Moreover, the heat source of the heat exchanger 8 can come from the furnace 5 or other heat sources, and is not particularly limited. In addition, the gas after vacuum rectification or distillation can also be heat exchanged without ion removal, that is, the gas after vacuum rectification or distillation discharged from the gas outlet 22 of the gas-liquid separator 2 can directly enter the heat exchanger 8, and then enter the high-temperature cracking reformer 3 from the heat exchanger 8.

[0076] Method for decontamination and recycling of organic waste liquid

[0077] The following is an explanation of the method for decomposing and reusing organic waste liquid according to the present invention. Figure 4 As shown, the method for decomposing and reusing organic waste liquid in an embodiment of the present invention comprises: (a) providing the organic waste liquid to a gas-liquid separator; (b) performing vacuum distillation or distillation on the organic waste liquid in the gas-liquid separator at a temperature of 50 to 300° C. and a vacuum degree of 40 to 101 KPa; (c) providing the gas after vacuum distillation or distillation to a high-temperature cracking recombinator; (d) performing cracking and recombination reaction in the high-temperature cracking recombinator to generate cracking gas.

[0078] Next, in the step (a), the organic waste liquid and RO water are preferably provided to the gas-liquid separator together. This can increase the amount of hydrogen produced by cracking. In a specific example, the weight ratio of RO water to organic waste liquid can be 0 to 9:1, preferably 2 to 4:1.

[0079] Furthermore, in the step (c), the gas after vacuum rectification or distillation is preferably subjected to ion removal to further reduce the ion concentration before being provided to the high-temperature cracking recombiner. Furthermore, in the step (c), it is more preferred that the gas after ion removal is subjected to heat exchange before being provided to the high-temperature cracking recombiner.

[0080] Furthermore, in the step (c), the ion removal is preferably carried out at a temperature between 25 and 300°C.

[0081] Alternatively, the reaction in step (d) may be performed at a temperature of 650 to 700° C. Preferably, the reaction in step (d) is performed in the presence of a catalyst (eg, a metal alloy catalyst).

[0082] Then, if Figure 5 As shown, the method for decomposing and reusing organic waste liquid of the present invention may also include: step (e), which provides the liquid after vacuum distillation or distillation to the furnace after passing through a filtering device as an auxiliary fuel. Step (e) may be performed after step (b) and before step (d), or after step (e) and before step (c), or at the same time as step (c). Through step (e), the residual calorific value of the liquid after vacuum distillation or distillation can be used for combustion heating to reduce fuel loss and reduce costs.

[0083] Furthermore, in step (e), the liquid after vacuum rectification or distillation is preferably provided to the furnace at a fixed flow rate, and the supply amount of the organic waste liquid is adjusted in conjunction with the demand for cracking gas. In this way, a dynamic balance between the demand for cracking gas and the supply amount of the organic waste liquid can be achieved, thereby achieving automated continuous operation. In addition, the combustion temperature of the furnace in step (e) can be 750-850°C.

[0084] Test example

[0085] The organic waste liquid decomposition and recycling device 100 of Example 1 was used to treat the organic waste liquid (experimental organic waste liquid) discharged from a semiconductor factory.

[0086] Composition analysis of organic wastewater

[0087] The components of the test example organic waste liquid (chemical oxygen demand (COD) of 1000000 ppm) were analyzed using the detection instruments listed in Table 1 below according to conventional detection methods.

[0088] [Table 1]

[0089]

[0090]

[0091] HPLC-MS = High Performance Liquid Chromatography Mass Spectrometry

[0092] (High-performance Liquid Chromatography-Mass Spectrophotometer)

[0093] GC-MS = Gas Chromatography Mass Spectrometry

[0094] Experimental results of vacuum distillation

[0095] The test example organic waste liquid was supplied to a gas-liquid separator and subjected to vacuum distillation at a vacuum degree of 40 to 48 KPa and a temperature of 160 to 170°C. The above vacuum degree and temperature conditions can be obtained based on the organic components in the test example organic waste liquid and by calculation using the Clausius-Clapeyron equation. The distillation temperature was observed at 170°C as the boundary, and the distilled material was heated to confirm the final residual coke amount (the weight of carbon remaining after the solution was heated), and the results are shown in the following Table 2.

[0096] [Table 2]

[0097]

[0098] From the results in Table 2, it can be seen that the residual coke amount is reduced from 0.7g to 0.1g by vacuum distillation, a reduction of 86%. In addition, even if the distillation is carried out under the conditions of higher vacuum degree (for example, vacuum degree 80-101KPa) and the same temperature (160-170°C), the effect of reducing the residual coke amount can be obtained.

[0099] Next, please refer to Figure 6 . Figure 6 The base peak chromatograms before and after the organic waste liquid was separated by vacuum distillation were confirmed by HPLC. Figure 6 As shown in the figure, before vacuum distillation separation, there is a signal of catechol (molecular weight: 110.1) at 2.9 min, and after vacuum distillation separation, its signal disappears. In addition, after vacuum distillation separation, the signal intensity of iminodiacetic acid at 1.1 min also weakens. This proves that the contribution of the reduction in residual coke is mainly from the removal of catechol, and secondarily from the removal of iminodiacetic acid.

[0100] It can be seen that after vacuum distillation (or distillation) separation, the gas component mainly includes amines such as hydroxylamine, ethanolamine and isopropanolamine; the liquid component mainly includes acids and phenols such as iminodiacetic acid and catechol. In the liquid after vacuum distillation separation (or distillation) in this test example, the residual calorific value of the liquid is about 4792 kcal / kg, and the residual calorific value of the liquid can be further utilized through the device of the above-mentioned embodiment 2 or embodiment 3.

[0101] Next, ion chromatography (IC) was used to detect the ion concentration of the test example organic waste liquid before and after vacuum distillation separation. As shown in Table 3, the fluorine ion concentration before vacuum distillation separation was 38900ppm, and the fluorine ion concentration after vacuum distillation separation was less than 2000ppm. It can be seen that vacuum distillation can reduce the fluorine ion concentration of the test example organic waste liquid by 95%.

[0102] [Table 3]

[0103]

[0104] In addition, the organic waste liquid of the test example after vacuum rectification or distillation separation may be subjected to additional ion removal to further reduce the ion concentration to a desired value, for example, to reduce the ion concentration to below 1000 ppm.

[0105] Test results of high temperature pyrolysis recombination reaction

[0106] Next, a comparison was made between high-temperature cracking and recombination reactions using organic waste liquids that had not been subjected to vacuum distillation and distillation and organic waste liquids that had been subjected to vacuum distillation.

[0107] In Comparative Example 1, the organic waste liquid of the test example is directly introduced into the high temperature cracking recombinator, and is heated in the high temperature cracking recombinator to perform a high temperature cracking and recombination reaction. In Test Example 1, the vacuum distillation of the test example is performed, and the gas after the vacuum distillation is introduced into the high temperature cracking recombinator to perform a high temperature cracking and recombination reaction.

[0108] The results show that in Comparative Example 1, since the organic waste liquid of the test example contains high-boiling organic compounds such as catechol, after 15 hours of high-temperature cracking and recombination reaction operation, coking will occur, causing pipeline blockage or poisoning of the catalyst, and the pressure of the pipeline will rise to a high 10 bar, which is dangerous to damage the equipment. On the other hand, in Test Example 1, because the concentration of high-boiling organic compounds such as catechol in the organic waste liquid of the test example is reduced by pre-vacuum distillation, the influence on the catalyst can be reduced and the operation time of the high-temperature cracking and recombination reaction can be extended to 45 hours, and the pressure of the pipeline can be maintained at a low 0.3 bar, which can extend the service life of the equipment. In addition, compared with Comparative Example 1, distillation and high-temperature cracking and recombination reactions also have the effect of suppressing the increase of pipeline pressure.

[0109] In addition, the inventors also conducted a test on the ratio of RO water to organic waste liquid to produce hydrogen by high temperature cracking. Referring to Table 4 below, it can be seen that when the weight ratio of RO water to organic waste liquid is 0:1, 51% volume of hydrogen (H 2 ). When the weight ratio of RO water to organic waste liquid is 1:1, 69% volume of H 2When the weight ratio of RO water to organic wastewater is 2.33:1, 84% volume of H 2 When the weight ratio of RO water to organic wastewater is 4:1, 81% volume of H 2 When the weight ratio of RO water to organic waste liquid is 9:1, 77% volume of H 2 It can be seen that the weight ratio of RO water to organic waste liquid can be 0-9:1, and more H can be produced when the weight ratio of RO water to organic waste liquid is 2-4:1. 2 .

[0110] [Table 4]

[0111]

[0112] The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. Embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention.

Claims

1. A device for decomposing and reusing organic waste liquid, It is characterized in that Include: An organic waste liquid tank, which is used to store organic waste liquid; A gas-liquid separator, comprising an organic waste liquid inlet, a gas outlet and a liquid outlet, and the gas-liquid separator is used for vacuum rectification or distillation; wherein the organic waste liquid inlet is connected to the organic waste liquid tank and receives the organic waste liquid from the organic waste liquid tank; and the gas outlet discharges the gas after vacuum rectification or distillation, and the liquid outlet discharges the liquid after vacuum rectification or distillation; an RO water machine that supplies RO water to the gas-liquid separator; and The high temperature cracking and reforming device receives the gas after vacuum rectification or distillation and performs cracking and reforming reaction to produce cracked gas.

2. The device for decomposing and recycling organic waste liquid according to claim 1, It is characterized in that Also includes: A filtering device connected to the liquid outlet; A furnace is connected to the filtering device and the high-temperature cracking recombiner.

3. The device for decomposing and recycling organic waste liquid according to claim 1 or 2, It is characterized in that Also includes: An ion removal tower is connected to the gas outlet and sends the gas after ion removal to the high-temperature cracking recombiner.

4. The device for decomposing and recycling organic waste liquid according to claim 3, It is characterized in that Also includes: A heat exchanger is connected to the ion removal tower and is used to send the gas after ion removal to the high-temperature cracking recombiner after heat exchange.

5. The device for decomposing and recycling organic waste liquid according to claim 1 or 2, It is characterized in that Also includes: A heat source, which controls the temperature of the gas-liquid separator to be between 50°C and 300°C; A vacuum pump controls the vacuum degree of the gas-liquid separator to be between 40 and 101 KPa.

6. The device for decomposing and recycling organic waste liquid according to claim 1 or 2, It is characterized in that The gas-liquid separator comprises a cavity, and the cavity is an integrated type or a separated type, and a stirring device is provided at the bottom of the cavity.

7. A method for decomposing and reusing organic waste liquid, It is characterized in that Include: (a) providing organic waste liquid and RO water to a gas-liquid separator; (b) performing vacuum rectification or distillation on the organic waste liquid in the gas-liquid separator at a temperature of 50 to 300° C. and a vacuum degree of 40 to 101 KPa; (c) providing the gas after vacuum rectification or distillation to a high temperature cracking recombiner; (d) performing a cracking and reforming reaction in a high temperature cracking and reforming device to produce cracked gas.

8. The method for decomposing and reusing organic waste liquid according to claim 7, It is characterized in that The method further comprises: step (e), wherein the liquid after vacuum rectification or distillation is provided to the furnace through a filtering device to serve as auxiliary fuel.

9. The method for decomposing and reusing organic waste liquid according to claim 7 or 8, It is characterized in that In the step (c), the gas after vacuum rectification or distillation is first subjected to ion removal and then provided to a high-temperature cracking recombiner.

10. The method for decomposing and reusing organic waste liquid according to claim 9, It is characterized in that In the step (c), the gas after ion removal is subjected to heat exchange and then provided to a high temperature cracking recombiner.

11. The method for decomposing and reusing organic waste liquid according to claim 7, It is characterized in that The weight ratio of RO water to organic waste liquid is 2 to 4:

1.

12. The method for decomposing and reusing organic waste liquid according to claim 8, It is characterized in that In the step (e), the liquid after vacuum rectification or distillation is provided to the furnace at a fixed flow rate, and the supply amount of the organic waste liquid is adjusted in conjunction with the demand for cracking gas.

13. The method for decomposing and reusing organic waste liquid according to claim 9, It is characterized in that In the step (c), ion removal is carried out at a temperature between 25 and 300°C.

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