CN113124575B

CN113124575B - Parabolic trough type baffling type integrated photo-thermal synergistic reaction device

Info

Publication number: CN113124575B
Application number: CN202110356465.0A
Authority: CN
Inventors: 孙杰; 李东辉; 张振文; 张智; 马荣
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2022-06-21
Anticipated expiration: 2041-04-01
Also published as: CN113124575A

Abstract

An integrated parabolic trough deflector photothermal cooperative reaction device, comprising a parabolic trough concentrator and a deflector photothermal cooperative reactor, wherein the deflector photothermal cooperative reactor is located in the parabolic trough concentrator when working. On the focal line of the optical device, the deflector photothermal cooperative reactor moves with the change of the focal line of the parabolic trough concentrator. The invention makes full use of the high-density light and heat provided by the parabolic trough concentrator to carry out the photothermal synergistic catalytic reaction, and the baffle structure ensures the sufficient reaction of the reactants, realizes the efficient conversion of solar energy to chemical energy, and improves the utilization efficiency of solar energy , thereby reducing fossil energy consumption and pollutant emissions.

Description

Parabolic trough type baffling type integrated photo-thermal synergistic reaction device

Technical Field

The invention relates to the technical field of solar energy utilization, in particular to an integrated parabolic trough type baffling type photo-thermal synergistic reaction device.

Background

The solar energy has rich reserves, green and clean property and higher grade, and is one of the most potential renewable energy sources. However, solar energy has low energy density, uneven spatial distribution, uneven temporal distribution, and the like, and thus is difficult to be directly and efficiently utilized. The chemical reaction is driven by directly utilizing solar energy, and then the solar energy is converted into chemical energy, so that the storage can be carried out in a season-crossing manner and day-night manner, and the solar energy is an effective technical means for utilizing the solar energy. However, the efficiency of the traditional photocatalytic reaction is extremely low; the photo-thermal driven thermal reaction has high cost. By utilizing the spectral characteristics of solar energy of 200-2500nm, heat required by the reaction is provided by infrared light, and light energy is provided by ultraviolet light and visible light, so that the photo-thermal concerted catalysis reaction is driven. The novel catalysis technology can effectively improve the reaction efficiency of the traditional photocatalysis, effectively reduce the activation energy of thermal reaction and reduce the reaction temperature. As is well known, the reactor can play a key role in process intensification and reaction efficiency improvement in the macro application of the catalyst, but a light-collecting reactor for photo-thermal concerted catalytic reaction does not exist at present, so that the practical application of the novel catalytic technology is greatly hindered.

Disclosure of Invention

In order to overcome the technical problems, the invention provides an integrated parabolic trough type baffling type photo-thermal synergistic reaction device, which aims to solve the problems of reaction process strengthening and reaction efficiency improvement in the solar-driven photo-thermal reaction process. The light and the heat of the high density that this device make full use of throws the parabolic trough concentrator and provide carry out light and heat concerted catalysis reaction, and baffling type structure ensures that the reactant fully reacts, has realized the high-efficient conversion of solar energy to the chemical energy, has improved solar energy utilization efficiency to reduce fossil energy resource consumption and pollutant emission.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a thing slot type baffling type light and heat is in coordination with reaction unit is thrown in integration, includes throwing thing slot type spotlight ware 1 and baffling type light and heat is in coordination with

reactor

2, 2 during operation of baffling type light and heat are located the focal line of throwing thing slot

type spotlight ware

1, 2 changes along with throwing thing slot type spotlight ware 1 focal line of baffling type light and heat are in coordination with reactor and are removed.

The baffled photothermal synergistic reactor 2 comprises a quartz shell 4, a reactant inlet 3 and a reactant outlet 8 are respectively arranged at two ends of the quartz shell 4, a catalytic bed 6 is placed inside the quartz shell 4, a baffle plate 7 is vertically arranged between the catalytic bed 6 and the quartz shell 4, and the catalytic bed 6 is positioned on the focal line of the parabolic trough type condenser 1.

And a vacuum interlayer 5 is arranged on the outer side edge surface of the quartz shell 4.

The surface of the quartz shell 4 is provided with an antireflection film, and the light transmittance of the antireflection film is more than 97%.

The catalytic bed 6 comprises a photo-thermal synergistic catalyst loaded with plasmon metal and a base material, absorbs sunlight in a full spectrum manner, and performs photo-thermal synergistic catalytic reaction on gas-phase reactants by utilizing heat-photoelectron-thermoelectrons converted from the sunlight.

The catalytic bed 6 is of a porous structure and is arranged along the direction of a focal line; the porous structure is used to ensure that the gas/liquid phase reactants enter the reactor from the reactant inlet 3 and are blocked by the baffle plates 7 to repeatedly pass through the catalytic bed 6 and finally flow out from the reactant outlet 8.

Said baffles 7 are in intimate contact with the catalytic bed 6 to form a blockage of the fluid flow in the direction of the focal line and a guidance of the deflection of the fluid perpendicular to the direction of the focal line.

The invention has the beneficial effects that:

1. the invention adopts a baffle plate type structure, so that the flow path of reactants in the reactor is much larger than that of a tubular filling type reactor, the pressure drop of the reactants is much smaller, the effective contact of the reactants and a catalyst is more uniform, and the reaction efficiency is improved.

2. The catalyst bed adopted by the invention is fixedly arranged, so that the problem of abrasion caused by mutual collision between particles due to inertia of the catalyst when the reactor moves along with the condenser in the use process of the packed reactor can be solved. Therefore, the service life of the catalyst is prolonged, and the operation and maintenance cost is reduced.

3. The integrated parabolic trough type baffling type photo-thermal synergistic reaction device provided by the invention can convert low-density solar energy into high-density heat energy and light energy by matching with the parabolic trough type condenser, the light condensation ratios of different forms can be matched with chemical reactions at different temperatures, and meanwhile, the length of the reactor can be matched with the reaction efficiency of reactants, so that the device is strong in universality and low in cost.

4. The integrated parabolic trough type baffling type photo-thermal synergistic reaction device provided by the invention can utilize the concentrated sunlight provided by the condenser and can also utilize the non-concentrated sunlight, and the capture area of the sunlight can be maximized.

Drawings

FIG. 1 is a schematic structural diagram of an integrated parabolic trough baffled photothermal synergistic reaction device.

Wherein each component and the corresponding label are: 1-a parabolic trough concentrator; 2-baffling type photo-thermal synergistic reactor; 3-a reactant inlet; 4-a quartz shell; 5-vacuum interlayer; 6-catalytic bed; 7-baffle plate; 8-reactant outlet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of an integrated concentrated solar photo-thermal cooperative catalytic reaction device, which can utilize concentrated solar energy provided by a parabolic trough type condenser and natural non-concentrated solar energy to drive photo-thermal cooperative reaction, so as to realize conversion and storage of solar energy to chemical energy. Meanwhile, process strengthening is realized through multi-field synergistic effects such as an optical field, a flow field, a temperature field and the like, so that the solar energy-chemical energy conversion efficiency is obviously improved. The integrated device consists of a parabolic trough type condenser 1 and a baffling type photo-thermal synergistic reactor 2.

Wherein, baffling type light and heat coreactor 2 includes: reactant inlet 3, quartz shell 4, vacuum interlayer 5, catalytic bed 6, baffle 7, reactant outlet 8. The baffled photo-thermal synergistic reactor 2 is positioned on the focal line of the parabolic trough type condenser 1 when in work so as to ensure that two sides of the catalytic bed 6 can receive concentrated sunlight and non-concentrated sunlight approximately and vertically at the same time, and the light spot of the concentrated sunlight completely covers the catalytic bed 6. In the scheme, the quartz shell needs to reduce light loss, and the transmittance of sunlight needs to be more than 97% so as to improve the utilization efficiency of solar energy.

The vacuum interlayer 5 reduces the heat loss of the reactor, and the efficiency of the heat loss is lower than 95%.

The baffles 7 are arranged in a vertical relationship with the catalytic bed 6 to ensure that the direction of the reactant flow field is approximately perpendicular to the arrangement direction of the catalytic bed.

The catalytic bed 6 is composed of a photo-thermal synergistic catalyst loaded with plasmon metal and a substrate material, absorbs sunlight in a full spectrum, and performs photo-thermal synergistic catalytic reaction on a gas-phase reactant by utilizing the heat, photoelectron and hot electron converted by the sunlight so as to realize high-efficiency catalytic conversion.

The quartz shell 4 is provided with a vacuum interlayer 5 structure along the surface, and the surface of the quartz shell is provided with an antireflection film, and the light transmittance of the antireflection film is more than 97%.

The invention can utilize the concentrated sunlight provided by the parabolic trough type condenser and utilize the non-concentrated sunlight to realize the maximum utilization of solar energy, and meanwhile, the baffled reaction form can improve the reaction efficiency and the conversion from the solar energy to chemical energy.

A catalytic bed 6 is arranged in the middle of the baffled photo-thermal synergistic reactor 2, and sunlight can fall on the catalytic bed 6 through upper and lower quartz windows; a baffle plate 7 is arranged between the catalytic bed 6 and the upper and lower windows, the catalytic bed 6 is of a porous structure, and gas phase/liquid phase reactants can enter the reactor from the reactant inlet 3 and can be blocked by the baffle plate 7 to repeatedly pass through the catalytic bed 6, and finally flow out from the reactant outlet 8; the quartz shell 4 (containing a vacuum interlayer) not only ensures that light rays enter the reactor, but also keeps the temperature of the whole reactor.

In the invention, the parabolic trough type photo-thermal reaction device with higher energy is developed and applied in consideration of the fact that photo-thermal synergistic reaction cannot be effectively driven by low optical density and thermal density under natural light, and the method for providing high-density light and high-density heat energy for the photo-driven chemical reaction is one of effective ways for solving the problem of solar energy utilization.

The following is a specific example of the photothermal coupled methanol reforming hydrogen production reaction:

the condenser of the device selects a parabolic trough condenser for condensing light, the reaction is methanol reforming hydrogen production reaction, the length of the reactor and the parabolic trough can be adjusted according to the reaction amount of methanol and steam, and the linear focusing condenser can adopt a double-shaft or single-shaft tracker form. The reactants enter a baffling type reactor and then undergo photothermal reaction, so that hydrogen and carbon dioxide can be generated, and the conversion efficiency of methanol is over 99 percent.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated parabolic trough type deflected photothermal cooperative reaction device, characterized in that, comprising a parabolic trough concentrator (1) and a deflected photothermal cooperative reactor (2), the deflected The photothermal cooperative reactor (2) is located on the focal line of the parabolic trough concentrator (1) during operation, and the deflected photothermal cooperative reactor (2) follows the focal line of the parabolic trough concentrator (1). changes to move;

The deflecting photothermal cooperative reactor (2) includes a quartz shell (4), and both ends of the quartz shell (4) are respectively provided with a reactant inlet (3) and a reactant outlet (8). A catalytic bed (6) is placed inside the quartz shell (4), a baffle (7) is vertically arranged between the catalytic bed (6) and the quartz shell (4), and the catalytic bed (6) is located in a parabolic trough type On the focal line of the condenser (1).

2 . The integrated parabolic trough deflected photothermal cooperative reaction device according to claim 1 , wherein a vacuum interlayer ( 5 ) is provided on the outer side of the quartz shell ( 4 ) along the surface. 3 .

3. An integrated parabolic trough type deflector photothermal cooperative reaction device according to claim 1, characterized in that, an antireflection film is provided on the surface of the quartz shell (4), and the light transmission of the antireflection film The rate is greater than 97%.

4. An integrated parabolic trough deflected photothermal synergistic reaction device according to claim 1, wherein the catalytic bed (6) contains a photothermal synergistic catalyst loaded with plasmonic metals It is composed of a matrix material, absorbs sunlight in the full spectrum, and uses the heat-photoelectron-hot electrons converted from sunlight to perform photothermal synergistic catalytic reaction on gas-phase reactants.

5 . The integrated parabolic trough deflected photothermal cooperative reaction device according to claim 1 , wherein the catalytic bed ( 6 ) has a porous structure and is arranged along the direction of the focal line; the porous The structure is used to ensure that the gas/liquid phase reactants enter the reactor from the reactant inlet (3) and are blocked by the baffle (7) and then repeatedly pass through the catalytic bed (6), and flow out from the reactant outlet (8).

6. An integrated parabolic trough deflected photothermal cooperative reaction device according to claim 1, characterized in that the catalytic bed (6) and the deflector (7) are in close contact to form a pair of fluid The blocking of flow along the focal line and the guidance of baffles in the direction perpendicular to the focal line.