CN110449110B

CN110449110B - Method and device for fuelization of waste organic solvent and modular reactor

Info

Publication number: CN110449110B
Application number: CN201810424828.8A
Authority: CN
Inventors: 张晏铨; 黄文庆; 曾尧宣
Original assignee: Huanchuangyuan Technology Co ltd
Current assignee: Huanchuangyuan Technology Co ltd
Priority date: 2018-05-07
Filing date: 2018-05-07
Publication date: 2021-09-14
Anticipated expiration: 2038-05-07
Also published as: CN110449110A

Abstract

The invention discloses a method and a device for fuelization of waste organic solvent and a modular reactor. The method for the fuelization of a spent organic solvent comprises the steps of; firstly, conveying gas is introduced into a reaction cavity, and the waste organic solvent is introduced into the reaction cavity through the attraction force generated by the conveying gas; then, gasifying the waste organic solvent to form a gas phase reactant; finally, the gas phase reactant is thermally cracked in an oxygen-deficient and high-temperature environment. Thereby, the increasingly serious problem of treatment of the waste organic solvent can be solved.

Description

Method and device for fuelization of waste organic solvent and modular reactor

Technical Field

The invention relates to a method and a device for treating waste organic solvent, in particular to a method and a device for preparing fuel from the waste organic solvent and a modular reactor.

Background

Organic solvents have found wide use because of their volatility and solubility characteristics (ability to dissolve some water insoluble materials). Organic solvents are found in many places in life, and for example, organic solvents can be used for preparing coatings, adhesives, detergents and the like. In addition, organic solvents are also used in various industrial fields, and for example, photoresist stripper used in the photovoltaic and semiconductor industries, wafer cleaning solution, and surface treatment solution for metal materials contain organic solvents.

The organic solvent has many advantages, but if the waste organic solvent is not properly treated, the waste organic solvent enters the atmosphere, the ground surface and the underground water through volatilization, permeation and the like, and is absorbed by passive plants and human bodies, so that serious environmental pollution and damage to human health are caused. Thus, there is a method of disposing of the waste organic solvent (e.g., a method of recovering and treating the waste organic solvent). However, the waste organic solvent is subjected to a number of pre-treatment steps to remove the interfering substances before beginning the disposal, and these pre-treatment steps usually use a large amount of clean water, which causes a risk of secondary pollution and increases the disposal cost.

The direct incineration method, the catalytic incineration method and the adsorption method are all the commonly used disposal methods of the waste organic solvent at present, and each of them has advantages and disadvantages. For example, direct incineration, while highly efficient and capable of recovering heat, is also highly hazardous and not suitable for treating halogenated organic solvents. In contrast, although the catalyst incineration method can decompose the organic solvent at a lower temperature and also recover heat, the method has a problem of catalyst poisoning and the cost of the catalyst needs to be considered. Although the adsorption method can treat the organic solvent with a low concentration, the method is troublesome in the recovery operation and causes a problem of waste water in the regeneration treatment of the adsorption bed.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a method and an apparatus for the fuel processing of waste organic solvent and a modular reactor, which are directed to the deficiencies of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is: a modular reactor for generating gaseous fuel from spent organic solvent includes a reaction chamber and a feed assembly. The reaction chamber has a gasification section and at least one reaction section located above the gasification section. The feeding subassembly includes a conveyer pipe, an air inlet joint and a feed liquor joint, the conveyer pipe has one and is located the outer first end of reaction chamber and one are located second tip in the reaction chamber, air inlet joint with feed liquor joint all connect in first end, second end communicate in the gasification district section. The extending direction of air inlet joint with the extending direction of first end is the same, the extending direction of feed liquor joint with the extending direction of first end is different. Wherein the inlet fitting is adapted to introduce a transport gas to create an attractive force from the inlet fitting to the first end of the transport pipe to introduce a spent organic solvent from the inlet fitting.

In an embodiment of the invention, the reaction chamber is vertical, the delivery pipe has a main body portion located between the first end portion and the second end portion, and the main body portion extends to the gasification section through the reaction section to deliver the introduced waste organic solvent to the gasification section for gasification.

In one embodiment of the present invention, a receiving table is disposed in the gasification section opposite to the second end of the transport pipe to contact the waste organic solvent transported to the gasification section.

In an embodiment of the invention, the inlet joint is arranged obliquely relative to the inlet joint.

In an embodiment of the present invention, the liquid inlet joint and the gas inlet joint are vertically disposed.

In an embodiment of the invention, the reaction chamber is horizontal, the delivery pipe has a main body portion located between the first end portion and the second end portion, and the main body portion is disposed in the gasification section to deliver the introduced waste organic solvent to the gasification section for gasification.

In an embodiment of the present invention, the reaction chamber includes at least one blocking structure disposed between the reaction section and the gasification section.

In an embodiment of the present invention, the reaction chamber has a discharge connector connected to the reaction section.

In order to solve the above technical problem, another technical solution adopted by the present invention is: a waste organic solvent fuel device uses the modular reactor.

In order to solve the above technical problem, another technical solution adopted by the present invention is: a method of fuelization of spent organic solvent comprising: introducing a conveying gas into a reaction chamber, and introducing a waste organic solvent into the reaction chamber by an attractive force generated by the conveying gas; gasifying the spent organic solvent to form a vapor phase reactant; and thermally cracking the gas-phase reactant in an oxygen-deficient and high-temperature environment.

In an embodiment of the present invention, before the step of introducing the waste organic solvent, the method further includes: and discharging oxygen out of the reaction cavity by using the conveying gas so that the content of the oxygen in the reaction cavity is not more than 1% by volume.

In one embodiment of the present invention, in the step of introducing the waste organic solvent, a volume ratio of the transport gas to the waste organic solvent is 27.7 to 1000.

In an embodiment of the present invention, during the thermal cracking step, the temperature of the reaction chamber is between 500K and 1200K.

In an embodiment of the present invention, the transport gas is nitrogen or argon, and the waste organic solvent is isopropanol or tetramethylammonium hydroxide.

The modular reactor provided by the invention has the beneficial effects that the modular reactor can be connected to the first end part of the conveying pipe through the technical scheme that the air inlet joint and the liquid inlet joint are both connected, wherein the extending direction of the air inlet joint is the same as that of the first end part, and the extending direction of the liquid inlet joint is different from that of the first end part, so that the waste organic solvent is introduced into the conveying pipe by utilizing the attraction force generated by the conveying gas and enters the reaction cavity along with the conveying gas, and the gaseous fuel is generated through reaction.

Another advantage of the present invention is that the apparatus for fueling waste organic solvent, which is provided by the present invention, can process a larger amount of waste organic solvent at a time by connecting a plurality of modular reactors in series (i.e., using modular reactors), and can realize large-scale continuous production of gas fuel.

The present invention has another advantage in that the method for converting waste organic solvent into fuel provided by the present invention can solve the problem of processing waste organic solvent and generate renewable energy by the technical scheme of introducing the transport gas into the reaction chamber and introducing the waste organic solvent into the reaction chamber by the attraction force generated by the transport gas.

For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.

Drawings

Fig. 1 is a schematic view of the overall structure of a modular reactor according to a first embodiment of the present invention.

FIG. 2 is a schematic top view of a first embodiment of the modular reactor of the present invention.

FIG. 3 is another schematic top view of a modular reactor according to a first embodiment of the present invention.

FIG. 4 is a schematic bottom structure view of a modular reactor according to a first embodiment of the present invention.

Fig. 5 is a schematic structural view of a spent organic solvent-fueled apparatus according to the present invention.

Fig. 6 is a flow chart of the method for fueling a spent organic solvent according to the present invention.

FIG. 7 is a schematic view showing the overall structure of a modular reactor according to a second embodiment of the present invention.

Figure 8 shows one of the internal designs of the reaction chamber of the modular reactor of an embodiment of the present invention.

FIG. 9 shows another internal design of the reaction chamber of the modular reactor of an embodiment of the present invention.

FIG. 10 shows yet another internal design of the reaction chamber of the modular reactor of an embodiment of the present invention.

FIG. 11 shows yet another internal design of the reaction chamber of the modular reactor of an embodiment of the present invention.

Detailed Description

Since most of the waste organic solvents have toxicity, the waste organic solvents not only harm the health of human bodies, but also pollute the environment. In addition, the disposal of the waste organic solvent is also a great problem. For this reason, the present invention provides a solution for the waste organic solvent for converting the waste organic solvent into a non-toxic gaseous fuel, which can be used to generate electricity. That is, the invention can generate renewable energy in addition while solving the increasingly serious problem of treating the waste organic solvent, and has environmental protection and energy benefits.

The following is a description of the embodiments of the present disclosure relating to the "spent organic solvent fuel device and the fuel method and the modular reactor thereof" by specific embodiments, and those skilled in the art can understand the advantages and effects of the present disclosure from the disclosure of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.

First embodiment

Referring to fig. 1, the present invention provides a modular reactor R that can utilize waste organic solvents to produce gaseous fuels. The modular reactor R may be a fluidized bed reactor or a fixed bed reactor in practice, but is not limited thereto. The modular reactor R comprises a reaction chamber 1 and a feeding assembly 2. In the design of the reactor, the feeding component 2 can drive the waste organic solvent into the reaction cavity 1 by using a conveying gas, the organic solvent is gasified (Gasification) in the reaction cavity 1, and then the gas phase organic solvent is thermally cracked (Pyrolysis) to obtain the gas fuel.

The waste organic solvent may be an organic solvent containing a hydrocarbon, and specific examples thereof include: alcohols, alcohol ethers, esters, aromatic hydrocarbons, and the like, but not limited thereto. The sources of the waste organic solvents are mainly semiconductor factories, chemical factories, and the like. In order to obtain methane gas, the waste organic solvent is preferably isopropyl alcohol (IPA) or tetramethylammonium hydroxide (TMAH). In addition, the transport gas may be nitrogen or an inert gas (e.g., argon), but is not limited thereto.

In the embodiment, the reaction chamber 1 is vertical, and the reaction chamber 1 has a gasification section 11 and at least one reaction section 12 located above the gasification section 11, wherein the reaction section 12 is connected to a discharge connector 13. After entering the reaction chamber 1, the waste organic solvent is heated and gasified in the gasification section 11, and the gas-phase organic solvent (gas-phase reactant) flows upward to the reaction section 12 for thermal cracking. The product is recovered from the discharge joint 13 and then separated and purified, so that the required gas fuel can be obtained.

It should be noted that the number of the reaction sections 12 can be determined according to the number of cracking reactions required by the waste organic solvent, for example, for the waste isopropyl alcohol, the reaction sections 12 can be further divided into a first reaction section 12a (primary reaction section) and a second reaction section 12b (secondary reaction section) located above the first reaction section 12 a. Thus, isopropanol gas may be first reacted in the first reaction zone 12a to produce acetone and hydrogen or to produce propane and water, wherein acetone may continue to react in the second reaction zone 12b to produce methane and ketene.

To make the isopropanol react more readily to form acetone and hydrogen, the temperature of the first reaction zone 12a may preferably be in the range of 500 to 1200, more preferably 775K. At this temperature, acetone was produced at a rate 14 times the rate of propane production.

In addition, in order to prevent the modular reactor R from exploding, before the waste organic solvent enters the reaction chamber 1, oxygen can be discharged out of the reaction chamber 1 by using a conveying gas to form an oxygen-deficient environment, and the oxygen content in the reaction chamber 1 is not more than 1% by volume. That is, the vapor phase organic solvent is thermally cracked in an oxygen-deficient and high-temperature environment.

In addition, in order to increase the conversion rate of the waste organic solvent, the volume ratio of the transport gas to the waste organic solvent at the time of feeding may preferably be 27.7 to 1000.

Referring to fig. 2 and 3, the feeding assembly 2 includes a delivery pipe 21, an air inlet joint 22 and an air inlet joint 23, the delivery pipe 21 has a first end portion 211, a second end portion 212 and a main body portion 213 located between the first end portion 211 and the second end portion 212. Wherein the first end 211 is located outside the reaction chamber 1, and the inlet connector 22 and the inlet connector 23 are both connected to the first end 211. The second end 212 is located in the reaction chamber 1 and is communicated with the gasification section 11. The main body 213 extends through the reaction zone 12 to the gasification zone 11.

It should be noted that the extending direction of the air inlet joint 22 is the same as the extending direction of the first end portion 211, and the extending direction of the air inlet joint 23 is different from the extending direction of the first end portion 211. For example, the inlet 23 may be disposed at an angle with respect to the inlet 22 (as shown in FIG. 2), or the inlet 23 may be disposed perpendicular to the inlet 22 (as shown in FIG. 3). Thus, when the conveying gas passes through the first end portion 211, there is a pressure difference between the inside of the inlet joint 23 and the external atmospheric pressure, that is, the pressure inside the inlet joint 23 is smaller than the external atmospheric pressure. Under the action of the pressure difference, a suction force of the gas inlet 22 toward the first end 211 can be generated to drive the waste organic solvent from the gas inlet 22 into the delivery pipe 21, and then into the gasification section 11 of the reaction chamber 1 along with the delivery gas. Referring to fig. 2 and 3, in order to prevent the backflow of gas or liquid during the reaction process, a gas check valve 221 may be installed on the gas inlet connector 22, and a liquid check valve 231 may be installed on the liquid inlet connector 23.

Referring to fig. 4, in order to completely gasify the waste organic solvent carried by the conveying gas, the modular reactor R further includes an auxiliary gasification assembly 14 disposed in the gasification section 11 of the reaction chamber 1. The auxiliary gasification assembly 14 includes a receiving platform 141 and a heat conducting structure 142, and the receiving platform 141 and the heat conducting structure 142 can be made of a high heat conducting metal (such as aluminum, copper, etc.), but are not limited thereto. The heat conducting structure 142 is fixed at the bottom of the gasification section 11, and the heat conducting structure 142 may include a plurality of heat conducting fins (not numbered) arranged in a radial shape, but is not limited thereto. The receiving platform 141 is fixed on the heat conducting structure 142 and opposite to the second end 212 of the conveying pipe 21. In this way, the heat conducting structure 142 can improve the uniformity of the temperature distribution in the gasification section 11, and once the waste organic solvent enters the gasification section 11, the waste organic solvent will immediately contact the receiving platform 141 and be fully heated.

Referring to fig. 5 in conjunction with fig. 1, the present invention also provides a waste organic solvent fuel device D, which connects a plurality of modular reactors R in series to process a larger amount of waste organic solvent at a time, and can realize large-scale continuous production of gas fuel. In particular, the outlet connection 13 of the preceding modular reactor R can communicate with the inlet connection 22 of the inlet assembly 2 of the following modular reactor R through a line P. Thus, even if there are unreacted gaseous organic solvent (such as isopropanol gas) and gaseous intermediate product (such as acetone gas) in the gas effluent of the previous modular reactor R, these gaseous organic solvent and gaseous intermediate product can enter the following modular reactor R to continue the thermal cracking reaction to obtain the final product (such as methane gas).

Referring to fig. 6, the present invention also provides a method for fueling waste organic solvent, which comprises: step S100, introducing conveying gas into a reaction cavity, and introducing the waste organic solvent into the reaction cavity through attraction force generated by the conveying gas; step S102, gasifying the waste organic solvent to form a gas-phase reactant; and step S104, carrying out thermal cracking on the gas-phase reactant under the oxygen-deficient and high-temperature environment.

In this embodiment, it may be preferable to exhaust oxygen outside the reaction chamber using a transport gas before introducing the waste organic solvent so that the oxygen content in the reaction chamber does not exceed 1% by volume. When the waste organic solvent is introduced, the volume ratio of the transport gas to the waste organic solvent may preferably be 27.7 to 1000. In carrying out thermal cracking, the temperature of the reaction chamber may preferably be 500 to 1200, more preferably 775K.

Second embodiment

Referring to fig. 7, the present embodiment provides a modular reactor R, which includes a reaction chamber 1 and a feeding assembly 2. The difference of this embodiment is that the reaction chamber 1 is horizontal to overcome some installation place limitations, for example, the modular reactor R of this embodiment can be fixed on the ceiling of a factory.

In the present embodiment, the reaction chamber 1 has a gasification section 11, at least one reaction section 12 located above the gasification section 11, and at least one blocking structure 15 disposed between the gasification section 11 and the reaction section 12, wherein the blocking structure 15 is used for allowing the gas-phase organic solvent (gas-phase product) to flow from the gasification section 11 to the reaction section 12 along a predetermined path. The barrier structure 15 may be, but is not limited to, a gas impermeable barrier. A gas flow channel structure (not shown) may be formed on the blocking structure 15.

The feeding assembly 2 comprises a delivery pipe 21, an air inlet joint 22 and an inlet joint 23, wherein the delivery pipe 21 has a first end portion 211, a second end portion 212 and a main body portion 213 located between the first end portion 211 and the second end portion 212. The first end portion 211 is located outside the reaction chamber 1, the gas inlet joint 22 and the liquid inlet joint 23 are both connected to the first end portion 211, and the main body portion 213 and the second end portion 212 are both located in the gasification section 11. It should be noted that the extending direction of the inlet joint 22 is the same as the extending direction of the first end portion 211, and the extending direction of the inlet joint 23 is different from the extending direction of the first end portion 211. Thus, in the case of a horizontal structure of the reaction chamber 1, the feeding assembly 2 can also utilize a conveying gas to drive the waste organic solvent into the reaction chamber 1.

Although the intake connector 23 included in the feed module 2 is disposed obliquely with respect to the intake connector 22 in fig. 7, the intake connector 23 may be disposed perpendicularly to the intake connector 22 according to various requirements.

Third embodiment

Referring to fig. 8 to 11, the present embodiment provides a plurality of different internal designs of the reaction chamber 1 as follows. First, as shown in fig. 8, the reaction chamber 1 includes a plurality of air-tight partition plates 3, a plurality of air-tight carrier plates 4, a plurality of catalyst carriers 5, at least one air-tight retaining wall 6 and a plurality of induction coils 7. Specifically, the plurality of gas-impermeable partitions 3 are arranged offset from each other to form a gas flow path F. A plurality of gas-permeable carrier plates 4 are disposed on the gas flow path F, and each of the plurality of gas-permeable carrier plates 4 carries a catalyst carrier 5. The catalyst carrier 5 is an integrated structure and is made of metal wires (such as platinum or platinum alloy wires), and the catalyst carrier 5 has a catalyst required for thermal cracking reaction of specific waste organic solvents. The retaining wall 6 surrounds the gas-tight baffle 3, the gas-permeable carrier plate 4 and the catalyst carrier 5, and the plurality of induction coils 7 are arranged outside the retaining wall 6 and used for rapidly heating to the temperature required by the reaction.

Alternatively, as shown in fig. 9 and 10, in these designs, the catalyst carrier 5 has a stacked structure, that is, the catalyst carrier 5 is formed by stacking a plurality of catalyst carrier units 5 a. The plurality of catalyst carrier units 5a may be supported by the gas-permeable carrier plate 4 (as shown in fig. 9) or supported each other on the gas flow path F (as shown in fig. 10).

Alternatively, as shown in fig. 11, the catalyst carrier 5 can be further divided into a first catalyst carrier 51 and a second catalyst carrier 52, and the first catalyst carrier 51 and the second catalyst carrier 52 are all of an integrated structure, wherein the density of the first catalyst carrier 51 is higher than that of the second catalyst carrier 52, that is, the first catalyst carrier 51 has more metal wires per unit area.

Advantageous effects of the embodiments

The modular reactor provided by the invention has the beneficial effects that the modular reactor can be connected to the first end part of the conveying pipe through the technical scheme that the air inlet joint and the liquid inlet joint are both connected, wherein the extending direction of the air inlet joint is the same as that of the first end part, and the extending direction of the liquid inlet joint is different from that of the first end part, so that the waste organic solvent is introduced into the conveying pipe by utilizing the attraction force generated by the conveying gas and enters the reaction cavity along with the conveying gas to further react to generate the gas fuel.

As shown in table one below, the thermal cracking reaction was examined using fourier transform infrared spectroscopy (FTIR) under conditions in which isopropanol (60 wt%) was introduced into the reaction chamber by the feed module at a feed rate of 180ml/min, and the isopropanol content (n.d.) was not detected at 2950ppm, the lowest detection limit (l.d.l.). Therefore, the conversion rate of the waste organic solvent converted into the gas fuel by the modular reactor can reach more than 99 percent.

Watch 1

Composition (I)	Concentration (% by weight)	At the lowest detectionLimit (ppm)
			IPA	N.D.	2950
CH₄	34.9	286
			CO₂	1.13	423

The invention provides a waste organic solvent fuel device, which connects a plurality of modular reactors in series (i.e. uses the modular reactors), can process a larger amount of waste organic solvent at one time, and can realize large-scale continuous production of gas fuel.

The invention provides a method for preparing fuel from waste organic solvent, which can solve the problem of processing the waste organic solvent and generate renewable energy through the technical scheme of introducing conveying gas into a reaction cavity and introducing the waste organic solvent into the reaction cavity through the attraction generated by the conveying gas.

The disclosure is only a preferred embodiment of the invention and should not be taken as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A modular reactor for utilizing spent organic solvent to generate gaseous fuel, the modular reactor comprising:

a reaction chamber having a gasification zone and at least one reaction zone located above the gasification zone; and

a feed assembly, said feed assembly comprising a delivery tube, an air inlet connector, and a liquid inlet connector, said delivery tube having a first end portion located outside said reaction chamber and a second end portion located inside said reaction chamber, said air inlet connector and said liquid inlet connector both being connected to said first end portion, said second end portion being connected to said gasification section, wherein said air inlet connector extends in the same direction as said first end portion, said liquid inlet connector extends in a different direction than said first end portion, and said liquid inlet connector is disposed in an inclined manner with respect to said air inlet connector;

wherein the inlet fitting is adapted to introduce a transport gas to create an attractive force from the inlet fitting to the first end of the transport pipe to introduce a spent organic solvent from the inlet fitting.

2. The modular reactor of claim 1, wherein the reaction chamber is vertical, the transfer tube has a main portion between the first end and the second end, and the main portion extends through the reaction section to the gasification section to transfer the introduced waste organic solvent to the gasification section for gasification.

3. The modular reactor of claim 2, wherein the reaction chamber has an outlet connection to the reaction section.

4. The modular reactor of claim 2 wherein a receiving station is disposed within the gasification section opposite the second end of the transport pipe to contact the spent organic solvent transported to the gasification section.

5. The modular reactor of claim 1, wherein the reaction chamber is horizontal, the transfer tube has a main portion between the first end and the second end, and the main portion is disposed in the gasification section to transfer the introduced waste organic solvent to the gasification section for gasification.

6. The modular reactor of claim 5, wherein the reaction chamber comprises at least one barrier structure disposed between the reaction section and the gasification section.

7. The modular reactor of claim 6, wherein the reaction chamber has an outlet connection to the reaction section.

8. A spent organic solvent fuelization apparatus using the modular reactor according to any one of claims 1 to 7.

9. A method for fueling a spent organic solvent, comprising:

introducing a conveying gas into a reaction chamber, and introducing a waste organic solvent into the reaction chamber by an attractive force generated by the conveying gas;

gasifying the spent organic solvent to form a vapor phase reactant; and

and carrying out thermal cracking on the gas-phase reactant in an oxygen-deficient and high-temperature environment.

10. The method for fueling waste organic solvent as recited in claim 9, further comprising, before the step of introducing the waste organic solvent: and discharging oxygen out of the reaction cavity by using the conveying gas so that the content of the oxygen in the reaction cavity is not more than 1% by volume.

11. The method for fueling waste organic solvent according to claim 9, wherein in the step of introducing the waste organic solvent, the volume ratio of the transport gas to the waste organic solvent is controlled to be 27.7 to 1000.

12. The method as claimed in claim 9, wherein the temperature of the reaction chamber is controlled to be 500 to 1200K during the thermal cracking step.

13. The method of claim 9, wherein the transport gas is nitrogen or argon, and the waste organic solvent is isopropanol or tetramethylammonium hydroxide.