System for preparing hydrogen and oxygen mixed combustible gas from water

Abstract

Disclosed in the present invention is a system for preparing a hydrogen and oxygen mixed combustible gas from water, comprising a water tank, a first storage tank, a second storage tank and an electrochemical reactor. The water tank is connected to a feeding port of the electrochemical reactor via a water pipe. The electrochemical reactor is provided with a first gas outlet and a second gas outlet, the first gas outlet being connected to the first storage tank via a pipe, and the second gas outlet being connected to the second storage tank via a pipe. The first storage tank and the second storage tank are separately connected to a main discharge pipe via pipes, and a discharge port of the main discharge pipe is connected to a fuel gas storage tank. The electrochemical reactor is connected to a control apparatus. The present invention has the beneficial effects of effectively reduced production cost, capability of having the properties of combustibility, high calorific value, combustibility in an oxygen-deficient state and the like, and no pollution after combustion such that the hydrogen and oxygen mixed combustible gas is a novel efficient and environment-friendly clean energy.

Description

A system for preparing hydrogen-oxygen mixed combustible gas using water Technical Field

[0001] The present invention relates to the technical field of fuel preparation equipment, in particular to a system for preparing hydrogen-oxygen mixed combustible gas using water. Background Art

[0002] Hydrogen production by electrolysis of water is the main process for producing hydrogen. According to the cost data of hydrogen production by electrolysis of water available on the Internet, the cost of hydrogen production by electrolysis of water is 1000m 3 Take the hydrogen production of PEM electrolyzer with a scale of / h as an example:

[0003] 1. 2000 hours of work per year, 2 million cubic meters of hydrogen produced per year 3 ;

[0004] 2. 1000m 3 The cost of a PEM electrolyzer per hour is RMB 30 million, with RMB 2 million for land, civil engineering, and equipment installation, and RMB 400,000 per year for labor and maintenance.

[0005] 3. Every 1m 3 Hydrogen consumes 0.001 ton of raw water and 0.001 ton of cooling water, and the water fee is 5 yuan / ton;

[0006] 4. The depreciation period for equipment is 10 years, and the depreciation period for civil engineering and installation is 20 years. Straight-line depreciation is used, with no residual value. The annual depreciation rate for equipment is 10%, and the annual depreciation rate for civil engineering and installation is 5%;

[0007] 5. Every 1m 3 Hydrogen consumes 4.5 kWh of electricity, and one kilogram of hydrogen produces approximately 11.2 standard cubic meters. This means that producing one kilogram of hydrogen through water electrolysis requires 50.4 kWh of electricity. Based on the industrial electricity price of 0.4 yuan / kWh, this translates to a total electricity bill of 20.16 yuan. This translates to a cost of 39.87 yuan per kilogram of hydrogen produced through water electrolysis, of which electricity costs account for a whopping 50%. The PEM electrolyzer is expensive to purchase and depreciates significantly, accounting for 44% of the total cost. Therefore, hydrogen production stations are also developing integrated power generation and hydrogen production, such as through the use of photovoltaic power generation, to reduce electricity costs. However, this requires significant investment in equipment, which also increases production costs.

[0008] Currently, hydrogen production by water electrolysis is primarily categorized as alkaline electrolyzers and PEM electrolyzers. Alkaline electrolyzers have low electrolysis efficiency (70%-80%) and require the use of highly corrosive alkaline solutions, requiring the removal of water and alkali from the hydrogen. These processes also present challenges with rapid startup and load changes, hinder rapid adjustment of hydrogen production rates, and are less compatible with renewable energy generation. The diaphragm is a core component, and the development of new diaphragms is crucial for reducing hydrogen production energy consumption.

[0009] The Chinese invention patent application with publication number CN 104674292 A discloses a low-voltage electrochemical water molecule separation device and method thereof. Through an electrochemical reactor, water molecules are quickly separated into gaseous electrolytes under specific voltage and current conditions. Then, through a low-pressure controlled centrifugal separator, the gaseous electrolytes are separated into hydrogen and oxygen under ultra-low pressure, and mixed and stored in a combustible gas storage tank. When in use, the output is controlled through the combustible gas output port for fuel combustion. The low-voltage electrochemical water molecule separation device in this technical solution has a simple structure, small size, and low power consumption. It uses electrochemical reaction and ultra-low pressure controlled centrifugal separation technology to produce combustible hydrogen and combustion-supporting oxygen from ordinary water. It is an efficient gaseous fuel that can be used immediately after production. It will not explode under normal conditions and is very safe to use. It does not require any additives. The product of the produced hydrogen and oxygen after combustion is only water, and no toxic substances will remain or be released, truly achieving clean and environmental protection.

[0010] A Chinese invention patent application, publication number CN 105200447 A, discloses a high-energy gas generation device comprising at least one pair of electrolysis mechanisms consisting of a main electrode plate A and a main electrode plate B, and at least one excitation mechanism consisting of an excitation secondary electrode plate A and an excitation secondary electrode plate B. The electric field generated by the excitation mechanism is perpendicular to that of the electrolysis mechanism, and the electric fields generated by the electrolysis and excitation mechanisms interact to increase the energy required for water decomposition. This technical solution, through the interaction of the electric fields of the two mechanisms, increases the electric field interaction between hydrogen and oxygen atoms, altering the layered arrangement of electrons, increasing the distance between atoms, and modifying the hydrogen bond structure of water. This results in a gaseous mixture in which hydrogen and oxygen particles coexist in a relatively balanced and stable state. This gaseous mixture burns efficiently and stably, is non-flammable, can produce varying combustion temperatures depending on the heated material, and can burn in an oxygen-deficient state, making it a truly efficient, environmentally friendly, and clean fuel gas energy source.

[0011] However, although the above-mentioned existing technical solutions can produce hydrogen and oxygen mixed fuel in practical applications, the efficiency of converting water electrolysis into hydrogen and oxygen mixed fuel is low, and the effect in actual application needs to be improved.

[0012] Summary of the Invention

[0013] The purpose of the present invention is to address the deficiencies in the above-mentioned prior art and provide a system for preparing a hydrogen-oxygen mixed combustible gas using water, which generates a mixed combustible gas mainly composed of hydrogen and oxygen through electrolysis of water, and has the advantages of low preparation cost, high combustion calorific value, and no pollution after combustion.

[0014] The present invention solves its technical problems by adopting the following technical solution: a system for preparing a hydrogen-oxygen mixed combustible gas using water, comprising a water tank 1, a first storage tank 5, a second storage tank 6, and an electrochemical reactor 2. The water tank 1 is connected to the input port of the electrochemical reactor 2 via a water pipe. The electrochemical reactor 2 is provided with a first gas outlet and a second gas outlet. The first gas outlet is connected to the first storage tank 5 via a pipe, and the second gas outlet is connected to the second storage tank 6 via a pipe. The first storage tank 5 and the second storage tank 6 are respectively connected to an output manifold via pipes, and the output port of the output manifold is connected to a fuel gas storage tank 4. A solenoid valve is provided between the water tank 1 and the electrochemical reactor 2 for controlling the amount of water input. The electrochemical reactor 2 is connected to a control device 3.

[0015] The electrochemical reactor 2 includes a hermetically sealed shell and an electrolysis device placed in the inner cavity of the shell. The first connecting pole and the second connecting pole of the electrolysis device are respectively connected to the first output pole and the second output pole of the control device 3.

[0016] The electrolysis device includes a first end plate, a second end plate and an electrolysis unit. Several electrolysis units are arranged in parallel and placed between the first end plate 21 and the second end plate 22. Insulating spacers are provided between adjacent electrolysis units. The first end plate 21 and the second end plate 22 are fastened by connecting the connecting rod 27 and the nut 26 of the electrolysis unit in series.

[0017] Preferably, three mounting holes with triangular cross-sections are provided in the electrolysis unit, and three connecting rods 27 respectively pass through the mounting holes of the electrolysis unit and through the corresponding through holes of the first end plate 21 and the second end plate 22 and are fixed by screws.

[0018] Preferably, an insulating spacer is provided between adjacent electrolytic units to separate the adjacent electrolytic units to form a gap of 25-50 mm.

[0019] The first end plate 21 and the second end plate 22 are provided with through holes through which the connecting rod 27 passes. The connecting rod 27 passes through the through holes and is fastened on the outside with screws.

[0020] The electrolysis unit is composed of a positive electrode sheet 23 and a negative electrode sheet 24. An insulating rubber ring 28 is provided between the positive electrode sheet 23 and the negative electrode sheet 24 to bond the positive electrode sheet 23 and the negative electrode sheet 24 together. The positive electrode sheet 23 and the negative electrode sheet 24 are respectively connected to the first output pole and the second output pole of the control device 3 through the first pole bus 31 and the second pole bus 32.

[0021] The catalytic layer attached to the surface of the positive electrode sheet 23 and the negative electrode sheet 24 can improve the efficiency of producing hydrogen and oxygen mixed combustible gas by water electrolysis and reduce production costs.

[0022] Preferably, the catalytic layer is a platinum metal coating.

[0023] Preferably, the thickness of the catalytic layer is between 10-50 nm, which is not easy to cause loss during use and has extremely high electrolysis efficiency.

[0024] More preferably, the catalytic layer is a platinum (Pt), palladium (Pd), or iridium (Ir) coating.

[0025] Preferably, the thickness of the insulating rubber ring between the positive electrode sheet and the negative electrode sheet is 10-30 mm, so that there is a gap between the positive electrode sheet and the negative electrode sheet, and there is an appropriate gap between the positive electrode sheet 23 and the negative electrode sheet 24, so that water can fully contact with the positive electrode sheet 23 and the negative electrode sheet 24, and form an appropriate electrolysis field to improve the electrolysis efficiency.

[0026] The technical solution of the present application can generate mutually crossed electric fields through the electrolysis mechanism and the excitation mechanism, so as to change the hydrogen-oxygen bond structure of water and produce a mixed combustible gas mainly composed of hydrogen and oxygen, thereby effectively reducing the production cost; it has the characteristics of being combustible, having a high calorific value and being combustible in an oxygen-deficient state; it is pollution-free after combustion and is a new type of efficient, environmentally friendly and clean gas energy that can be used in industry and household life.

[0027] Compared with the prior art, the present invention has the advantages of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a system block diagram 1 of a system for preparing hydrogen-oxygen mixed combustible gas using water according to the present invention;

[0029] FIG2 is a system block diagram 2 of a system for preparing a hydrogen-oxygen mixed combustible gas by using water according to the present invention;

[0030] Figure 3-5 is a structural diagram of an electrochemical reactor in a system for preparing a hydrogen-oxygen mixed combustible gas using water;

[0031] FIG6 is a structural diagram of an electrolysis unit of a system for preparing hydrogen-oxygen mixed combustible gas using water according to the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described below with reference to the accompanying drawings. It should be noted that these specific embodiments are merely representative of the present invention, and the specific methods, devices, conditions, materials, etc. exemplified herein are not intended to limit the present invention or the corresponding embodiments. The description of orientation herein is based on Figure 1 as a reference standard.

[0033] A system for producing a hydrogen-oxygen mixed combustible gas using water, as shown in Figures 1 and 2, includes a water tank 1, a first storage tank 5, a second storage tank 6, and an electrochemical reactor 2. The water tank 1 is connected to the input port of the electrochemical reactor 2 via a water pipe. The electrochemical reactor 2 is provided with a first gas outlet and a second gas outlet. The first gas outlet is connected to the first storage tank 5 via a pipe, and the second gas outlet is connected to the second storage tank 6 via a pipe. The first storage tank 5 and the second storage tank 6 are each connected to an output manifold via a pipe, and the output port of the output manifold is connected to a fuel gas storage tank 4. Water passes through the electrochemical reactor 2 to produce a mixed combustible gas primarily composed of hydrogen and oxygen. The mixed gas is collected in the first storage tank 5 and the second storage tank 6 as a complementary buffer, and then fed into the fuel gas storage tank 4 for storage. This ensures a continuous supply of fuel to the fuel gas storage tank 4 and avoids interruptions. A solenoid valve is provided between the water tank 1 and the electrochemical reactor 2 to control the amount of water input into the electrochemical reactor 2. The electrochemical reactor 2 is connected to a control device 3, which is used to input the processed current to the electrodes in the electrochemical reactor 2. The control device 3 includes a first output terminal and a second output terminal. The control device 3 includes a rectifier circuit and a current stabilization circuit, etc., for generating an alternating current, which can be output to the electrodes in the electrochemical reactor 2 through the first output terminal and the second output terminal.

[0034] As shown in Figures 3-5, the electrochemical reactor 2 includes an airtight housing and an electrolysis device disposed within the housing. The first and second connection electrodes of the electrolysis device are connected to the first and second output electrodes of the control device 3, respectively. The electrolysis device includes a first end plate, a second end plate, and electrolysis cells. Several electrolysis cells are arranged in parallel and disposed between the first end plate 21 and the second end plate 22. Insulating spacers are provided between adjacent electrolysis cells. The first and second end plates 21, 22 are secured together by a connecting rod 27 and a nut 26, which are connected in series with the electrolysis cells. The connecting rod 27 is made of an insulating material.

[0035] Preferably, three mounting holes with triangular cross-sections are provided in the electrolysis unit, and three connecting rods 27 pass through the mounting holes of the electrolysis unit respectively, and pass through the corresponding through holes of the first end plate 21 and the second end plate 22 and are screwed and fixed. An insulating spacer is provided between adjacent electrolysis units to separate adjacent electrolysis units to form a gap of 30 mm, which has the best electrolysis efficiency. The first end plate 21 and the second end plate 22 are provided with through holes through which the connecting rods 27 pass, and the connecting rods 27 pass through the through holes and are screwed and fixed on the outside. A handle 25 is provided at the upper end of the first end plate 21 and the second end plate 22 to facilitate the movement of the electrolysis device in the shell and improve the efficiency of installation, maintenance and cleaning. The first end plate 21 and the second end plate 22 of the electrolysis device are stuck in the mounting groove in the shell and are fixed in the shell by the shell cover.

[0036] As shown in Figure 6, the electrolysis unit is composed of a positive electrode sheet 23 and a negative electrode sheet 24. An insulating rubber ring 28 is provided between the positive electrode sheet 23 and the negative electrode sheet 24 to bond the positive electrode sheet 23 and the negative electrode sheet 24 together. The positive electrode sheet 23 and the negative electrode sheet 24 are respectively connected to the first output pole and the second output pole of the control device 3 through the first pole bus 31 and the second pole bus 32.

[0037] The surfaces of the positive electrode sheet 23 and the negative electrode sheet 24 are attached with a catalytic layer, which can improve the efficiency of producing a mixed combustible gas of hydrogen and oxygen by water electrolysis and reduce production costs. Preferably, the catalytic layer is a platinum metal coating. Preferably, the thickness of the catalytic layer is between 20-30 nm, which can be less likely to cause loss during use and has extremely high electrolysis efficiency. More preferably, the catalytic layer is a platinum (Pt), palladium (Pd), or iridium (Ir) coating.

[0038] Preferably, the thickness of the insulating rubber ring between the positive electrode sheet 23 and the negative electrode sheet 24 is 20 mm, so that there is an appropriate gap between the positive electrode sheet 23 and the negative electrode sheet 24, the water can fully contact the positive electrode sheet 23 and the negative electrode sheet 24, and form an appropriate electrolysis field, thereby improving the electrolysis efficiency. The water in the water tank 1 is introduced into the inner cavity of the shell, so that the electrolysis device is immersed in water. After the electrolysis unit is connected to the output current of the control device 3, it electrolyzes the water around it to form a mixed combustible gas mainly composed of oxygen and hydrogen. The inner cavity of the shell is provided with a water level monitoring sensor to ensure that the water level in the inner cavity of the shell is not higher than three-quarters of the full water level of the inner cavity. The water level monitoring sensor and the solenoid valve are respectively connected to the control device 3 to achieve automatic control.

[0039] The water is water under alkaline conditions. The water in the water tank 1 is added to the electrochemical generator 2. The positive electrode 23 and the negative electrode 24 of the electrolysis unit in the electrolysis device generate an electric current to electrolyze the water under the control of the control device 3, and quickly electrolyze and separate the water molecules into oxygen and hydrogen to form a mixed combustible gas. The mixed combustible gas is respectively input into the complementary first storage tank 5 and the second storage tank 6, and then respectively input into the fuel gas storage tank 4 for output application. Among them, a gas circuit one-way valve is set between the first storage tank 5 and the second storage tank 6 and the electrochemical generator 2, and between the first storage tank 5 and the second storage tank 6 and the fuel gas storage tank 4, which has realized the one-way safety isolation of the mixed combustible gas.

[0040] The mixed combustible gas prepared by the hydrogen-oxygen mixed combustible gas preparation system of this application was sent to the Guangzhou Energy Testing Institute for testing. The testing was based on GB / T13610-2020 and GB / T11062-2020, with standard reference conditions of 101.325 kPa and 20°C. The test results are shown in the following table:

[0041] From the results data in the table, it can be seen that the main components of the prepared mixed combustible gas are hydrogen and oxygen.

[0042] The production cost and combustion efficiency of the system for preparing hydrogen-oxygen mixed combustible gas using water in this application are shown in the following table:

[0043] As can be seen from the above table, the mixed combustible gas prepared by the system of this application has extremely high calorific value and very low production cost, and can be used as a high-grade energy to replace coal gas, natural gas, etc., with extremely high economic benefits.

[0044] In general, the technical solution of the present invention has high production efficiency and low cost, and can be applied to various thermal power plants, industrial boilers, waste incinerators, civilian stoves, automobiles and other means of transportation, etc.

[0045] The above is only a preferred embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. In other words, any simple equivalent changes and modifications made according to the scope of the patent application and the content of the invention description are still within the scope of the patent of the present invention.

Claims

1. A system for preparing hydrogen-oxygen mixed combustible gas using water, characterized in that: It includes a water tank, a first storage tank, a second storage tank and an electrochemical reactor. The water tank is connected to the input port of the electrochemical reactor through a water pipe. The electrochemical reactor is provided with a first gas outlet and a second gas outlet. The first gas outlet is connected to the first storage tank through a pipeline, and the second gas outlet is connected to the second storage tank through a pipeline. The first storage tank and the second storage tank are respectively connected to the output main pipe through pipelines, and the output port of the output main pipe is connected to the fuel gas storage tank; the electrochemical reactor is connected to the control device.

2. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 1, characterized in that: The electrochemical reactor includes a hermetically sealed shell and an electrolysis device disposed in an inner cavity of the shell. A first connecting pole and a second connecting pole of the electrolysis device are respectively connected to a first output pole and a second output pole of the control device.

3. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 2, characterized in that: The electrolysis device includes a first end plate, a second end plate and an electrolysis unit. Several electrolysis units are arranged in parallel and placed between the first end plate and the second end plate. Insulating spacers are provided between adjacent electrolysis units. The first end plate and the second end plate are fastened by connecting rods and nuts in series with the electrolysis units.

4. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 3, characterized in that: The electrolysis unit is provided with three mounting holes with triangular cross-sections. Three connecting rods respectively pass through the mounting holes of the electrolysis unit and pass through corresponding through holes of the first end plate and the second end plate and are fastened by screws.

5. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 4, characterized in that: An insulating spacer is provided between adjacent electrolytic units to separate the adjacent electrolytic units and form a gap of 25-50 mm.

6. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 5, characterized in that: The first end plate and the second end plate are provided with through holes through which the connecting rod passes. The connecting rod passes through the through holes and is tightened and fixed on the outside with screws.

7. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 6, characterized in that: The electrolysis unit consists of a positive electrode sheet and a negative electrode sheet, an insulating rubber ring is arranged between the positive electrode sheet and the negative electrode sheet to bond the positive electrode sheet and the negative electrode sheet together, and the positive electrode sheet and the negative electrode sheet are respectively connected to the first output electrode and the second output electrode of the control device through the first pole bus and the second pole bus.

8. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 7, characterized in that: A catalytic layer is attached to the surface of the positive electrode sheet and the negative electrode sheet, and the catalytic layer is a platinum metal coating.

9. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 8, characterized in that: The thickness of the catalytic layer is between 10-50 nm.

10. A system for preparing hydrogen-oxygen mixed combustible gas using water according to claim 9, characterized in that: The thickness of the insulating rubber ring between the positive electrode sheet and the negative electrode sheet is 10-30 mm, so that there is a gap between the positive electrode sheet and the negative electrode sheet.

Images