High-voltage electrode phase change boiler

Abstract

The utility model relates to the technical field of phase change boilers, in particular to a high-voltage electrode phase change boiler which comprises a heat exchanger and a high-voltage electrode assembly which are arranged on the inner side of a boiler shell. The heat exchanger is arranged on the upper portion of the boiler shell, the high-voltage electrode assembly comprises a phase electrode, a zero electrode and a lifting mechanism, the phase electrode is fixedly installed at the bottom end of the boiler shell, one end of the phase electrode is connected with high voltage, the other end of the phase electrode extends upwards into the inner side of the boiler shell, and the zero electrode is arranged on the upper side of the phase electrode and connected with the lifting mechanism. The lifting mechanism is used for carrying the zero electrode so as to adjust the distance between the zero electrode and the phase electrode; a flame heating mode of a traditional phase-change boiler is improved into a high-voltage electrode assembly heating mode, fuel combustion energy is replaced with electric energy, the electric energy is completely converted into heat through the electrode heating mode, zero emission is achieved, no pollution such as noise, fuel smoke and coal ash exists during equipment operation, and the phase-change boiler has the advantages of being clean in energy, environmentally friendly and capable of saving cost.

Description

Technical Field

[0001] The utility model relates to the technical field of phase change boilers, in particular to a high-voltage electrode phase change boiler. Background Art

[0002] Phase change boilers are widely used in hot water boilers for industrial heating and domestic heating because they effectively solve the problems of poor water quality in small-capacity hot water boilers and deformation or bursting of heat transfer parts caused by scaling. The structural principle of the phase change boiler is that a group of tubular heat exchange surfaces are arranged in the boiler body. A certain volume of heat exchange medium is contained in the boiler body. Low-temperature water flows through the tubular heat exchange surface. When the heat exchange medium absorbs the heat of the flame from the fire-facing heating surface, the temperature rises, vaporizes and separates into the steam space. Since the saturation temperature of the heat exchange medium is higher than that of low-temperature water, when the low-temperature water flows through the tubular heat exchange surface, it is bound to absorb the heat energy of the saturated heat exchange medium and the temperature rises. At the same time, the saturated heat exchange medium releases the latent heat of vaporization and undergoes a condensation phase change. The condensed heat exchange medium descends to the fire-facing heating surface to absorb heat and vaporize again. The above heat exchange process is repeated, and the low-temperature water continuously transports the heat energy absorbed by the boiler.

[0003] The existing phase change boiler is flame heated, that is, a burner is used in front of the furnace, coal, oil or natural gas is used as fuel, and a smoke pipe structure is used inside. Flame heating has the following defects: ① Since the fuel is a disposable energy that cannot be reused, the price will become more and more expensive; ② Incomplete combustion of the fuel will cause a lot of heat to be discharged from the flue gas, which will cause energy loss; ③ The flue gas discharged from combustion will contain waste gas, causing air pollution, which does not meet the environmental protection requirements of current policies for production.

[0004] Thanks to abundant wind, solar and thermal resources, clean energy represented by photovoltaic resources and wind power resources has risen rapidly. Since the power supply is highly secure, it has all the basic conditions for clean heating with renewable energy. The continuous increase in electric heating in recent years has also proved the maturity and reliability of electric heating systems. At present, the country is also vigorously promoting coal-to-electricity and gas-to-electricity, so the research and development of high-voltage electrode phase change boilers has a broad application prospect. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a high-voltage electrode phase change boiler with high thermal efficiency, zero emission and low cost.

[0006] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0007] The utility model discloses a high-voltage electrode phase change boiler, comprising a heat exchanger and a high-voltage electrode assembly arranged on the inner side of a boiler shell; the heat exchanger is arranged on the upper part of the boiler shell, the high-voltage electrode assembly comprises a phase electrode, a zero electrode and a lifting mechanism, the phase electrode is fixedly mounted on the bottom end of the boiler shell, one end of the phase electrode is connected to high voltage electricity, and the other end extends upward into the inner side of the boiler shell, the zero electrode is arranged on the upper side of the phase electrode, the zero electrode is connected to the lifting mechanism, and the lifting mechanism is used to carry the zero electrode and adjust the distance between the zero electrode and the phase electrode.

[0008] In a possible technical solution, the boiler shell is a horizontal structure.

[0009] In a possible technical solution, the high-voltage electrode assemblies are provided in multiple groups, the number of which is a multiple of three, and every three groups of high-voltage electrode assemblies form a three-phase electrode unit. The three groups of high-voltage electrode assemblies in each three-phase electrode unit are arranged linearly in a line.

[0010] In a possible technical solution, the high-voltage electrode assembly further includes a lower tube seat arranged at the lower end of the boiler shell, the lower end of the lower tube seat is connected to a blind plate, and the phase electrode is mounted on the blind plate through an insulating sleeve.

[0011] In a possible technical solution, the upper end of the blind plate is connected to the bottom end of the protective shield, the upper end of the protective shield penetrates into the inner side of the boiler shell, and the phase electrode and the zero electrode are surrounded by the inner side of the protective shield.

[0012] In a possible technical solution, the lifting mechanism includes a lifting motor and a screw. The lifting motor is arranged at the top of the boiler shell. The output end of the lifting motor is connected to the screw. The screw vertically penetrates into the inner side of the boiler shell. The outer side of the screw is connected to a pivot plate through a nut. The pivot plate is connected to each of the zero electrodes through a connecting rod.

[0013] In a possible technical solution, the lead screw is located on the upper and lower sides of the nut and is respectively provided with an upper limit position and a lower limit position.

[0014] In a possible technical solution, a pressure plate is fixedly connected to the top of the protection shield, a through hole with a diameter the same as the inner diameter of the protection shield is provided on the pressure plate, and each of the connecting rods passes through the corresponding through hole and is connected to the zero electrode.

[0015] In a possible technical solution, a manhole is opened on one side of the boiler shell.

[0016] In a possible technical solution, the bottom end of the boiler housing is mounted on a base.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model improves the flame heating method of the traditional phase change boiler into a high-voltage electrode assembly heating method, replaces the fuel combustion energy with electric energy, and uses the high thermal resistance of water for electrode heating to directly convert electric energy into thermal energy and generate steam; the steam vaporizes upward to release thermal energy, and the low-temperature water in the heat exchanger absorbs thermal energy and the temperature rises to achieve the purpose of heating; the electrode heating method converts 100% of the electric energy into heat, with zero emissions and basically no heat loss. There is no noise, fuel smoke, fly ash and other pollution when the equipment is running. It has the characteristics of clean energy, environmental protection and cost saving, and meets the policy requirements of emission reduction and low carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of an existing gas phase change boiler;

[0020] Reference numerals: 1- boiler shell; 2- heat exchanger; 3- furnace body rear sealing plate; 4- pressure plate; 5- manhole; 6- protection shield; 7- lower pipe seat; 8- zero electrode; 9- blind plate; 10- phase electrode; 11- upper pipe seat; 12- seal; 13- lifting motor; 14- lead screw; 15- insulating sleeve; 16- pivot plate; 17- connecting rod; 18- base; 19- furnace body front sealing plate;

[0021] 100-boiler shell A; 200-heat exchanger A; 300-furnace rear cover A; 400-rear smoke box; 500-manhole A; 600-rear smoke box tube plate; 700-furnace core; 800-smoke pipe; 900-front smoke box tube plate; 1000-front smoke box; 1100-furnace front cover A; 1200-burner. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Example 1

[0023] like Figure 1As shown, a high-voltage electrode phase change boiler according to Example 1 of the utility model, the boiler shell 1 is a horizontal structure, the inner side of the boiler shell 1 is divided into an upper and lower part, the heat exchanger 2 is arranged at the upper part of the boiler shell 1, and the high-voltage electrode assembly is arranged at the lower part of the boiler shell 1. The high-voltage electrode assembly includes a phase electrode 10, a zero electrode 8 and a lifting mechanism. The phase electrode 10 is fixedly installed at the bottom end of the boiler shell 1, one end of which is connected to high voltage electricity, and the other end extends upward into the inner side of the boiler shell 1. The zero electrode 8 is arranged on the upper side of the phase electrode 10, and the zero electrode 8 is connected to the lifting mechanism. The lifting mechanism is used to carry the zero electrode 8 and adjust the distance between the zero electrode 8 and the phase electrode 10.

[0024] The utility model improves the flame heating method of the traditional phase change boiler into a high-voltage electrode assembly heating method, replaces the fuel combustion energy with electric energy, and uses the high thermal resistance of water for electrode heating to directly convert electric energy into thermal energy and generate steam; the phase electrode 10 and the zero electrode 8 are immersed in water during operation, and the water level should be higher than the position of the zero electrode 8 and lower than the height of the heat exchanger 2, and the steam vaporizes upward to release heat energy, and the low-temperature water in the heat exchanger 2 absorbs heat energy and the temperature rises to achieve the purpose of heating; the electrode heating method converts electric energy into heat 100%, with zero emissions and basically no heat loss. There is no noise, fuel smoke, fly ash and other pollution when the equipment is running, and it has the characteristics of clean energy, environmental protection, and cost saving, which meets the policy requirements of emission reduction and low carbon.

[0025] The zero electrode 8 is carried by the lifting mechanism to adjust the distance between the zero electrode 8 and the phase electrode 10. Since water is a conductor, according to the definition formula of resistance and electric power:

[0026] R=ρL / S

[0027] P=U² / R

[0028] Among them, R represents resistance, ρ represents the resistivity of the medium, which is determined by its own properties, L represents the length of the resistor, S represents the cross-sectional area of ​​the resistor; P represents electric power; U represents voltage; from this, it can be seen that when ρ, S, and U remain unchanged, when the distance between the two electrodes decreases, that is, L decreases, the water resistance between the two decreases, and the power is greater; conversely, when the distance between the two electrodes increases, that is, L increases, the water resistance between the two increases, and the power is smaller.

[0029] In actual implementation, the power load of the high-voltage electrode phase change boiler is determined according to the demand on the heating side, the electrode size and the number of high-voltage electrode assemblies to be installed are calculated according to the actual power load, and during heating, the zero electrode 8 is carried by the lifting mechanism to adjust the distance between the zero electrode 8 and the phase electrode 10 to adjust the power of each group of high-voltage electrode assemblies to meet the heating demand.

[0030] The present invention does not specifically limit the specific structure of the phase electrode 10 and the zero electrode 8. Figure 1The structure shown in the figure is only an example. In actual implementation, the specific structure of the phase electrode 10 and the zero electrode 8 can be appropriately selected according to the actual power load requirements.

[0031] The phase electrode 10 and the zero electrode 8 are both three-phase electrodes, that is, at least three groups of high-voltage electrode assemblies are provided. Preferably, in order to improve the heating efficiency, multiple groups of high-voltage electrode assemblies are provided, and the number of high-voltage electrode assemblies is a multiple of three. Every three groups of high-voltage electrode assemblies constitute a three-phase electrode unit. Since the horizontal structure of the boiler shell 1 has a larger lateral area and is convenient for the installation of the high-voltage electrode assemblies, the three groups of high-voltage electrode assemblies in each three-phase electrode unit are arranged linearly in a straight line; each three-phase electrode unit heats the water in the furnace evenly, thereby evenly generating steam, and evenly exchanging heat in the direction of the heat exchanger 2, thereby improving the heat exchange efficiency and heating effect.

[0032] The high-voltage electrode assembly also includes a lower tube seat 7 arranged at the lower end of the boiler shell 1, and the lower tube seat 7 corresponds to the phase electrode 10 and the zero electrode 8 one by one. The lower end of the lower tube seat 7 is connected to the blind plate 9, and the phase electrode 10 is installed on the blind plate 9 through the insulating sleeve 15; the upper end of the blind plate 9 is connected to the bottom end of the protective shield 6, and the upper end of the protective shield 6 penetrates into the inner side of the boiler shell 1, and the phase electrode 10 and the zero electrode 8 are surrounded by the inner side of the protective shield 6. The protective shield 6 insulates the phase electrode 10 and the zero electrode 8 from the boiler shell 1. The material of the protective shield 6 can be selected from any insulating material. Specifically, the shape of the protective shield 6 is a vertical cylinder, and the upper end of the protective shield 6 is open.

[0033] The lifting mechanism includes a lifting motor 13 and a lead screw 14. The lifting motor 13 is arranged on the upper tube seat 11 at the top of the boiler shell 1. A seal 12 is provided between the upper tube seat 11 and the boiler shell 1. The output end of the lifting motor 13 is connected to the lead screw 14. The lead screw 14 vertically passes through the upper tube seat 11 downward and penetrates into the inner side of the boiler shell 1. The outer side of the lead screw 14 is connected to a pivot plate 16 through a nut. Figure 1 The effect shown in the figure is that three groups of high-voltage electrode assemblies are set up, and the pivot plate 16 is connected to each zero electrode 8 through a vertical connecting rod 17; the output end of the lifting motor 13 rotates to drive the screw 14 to rotate, and the nut slides on the surface of the screw 14 through the threaded fit to drive the pivot plate 16 to move up and down, and the pivot plate 16 drives each zero electrode 8 to move up and down synchronously through each connecting rod 17.

[0034] The upper and lower sides of the lead screw 14 located at the nut are respectively provided with an upper limit and a lower limit (not shown in the figure) to limit the up and down movement range of the zero electrode 8.

[0035] For the convenience of installation, the bottom end of the protective shield 6 is connected to the upper end of the blind plate 9 by a positioning ring buckle, and the top of the protective shield 6 is fixedly connected with a pressure plate 4, on which a through hole with a diameter the same as the inner diameter of the protective shield 6 is provided, and each connecting rod 17 passes through the corresponding through hole and is connected to the zero electrode 8. The pressure plate 4 can consolidate and limit the position of the protective shield 6, prevent the protective shield 6 from displacement, and enhance the stability of the structure.

[0036] A manhole 5 is provided on one side of the boiler housing 1 ; the bottom end of the boiler housing 1 is mounted on a base 18 , which provides a stable support for the boiler while leaving sufficient space for the phase electrode 10 . Example 2

[0037] In view of the company's existing gas phase change boiler, it would undoubtedly be a waste of investment if it is directly replaced. In this embodiment 2, the gas phase change boiler is transformed into the high-voltage electrode phase change boiler of embodiment 1.

[0038] Figure 2 It is the structure of the existing gas phase change boiler, mainly composed of boiler shell A100, furnace 700, heat exchanger A200, rear smoke box 400, front smoke box 1000, burner 1200, etc. Since the phase change boiler heat exchanger A200 is built-in, the space inside the furnace is relatively large, which facilitates the implementation of the transformation plan. After the transformation, the fuel is changed from natural gas to high-voltage electricity; the gas phase change boiler is a horizontal structure, and the furnace body is divided into upper and lower parts. The lower part is a three-return smoke tube shell wet back structure, that is, the furnace 700 and the smoke tube 800 form the heating surface, with a large design capacity, and the upper part is a steam chamber, which is equipped with a tubular stainless steel steam-water heat exchanger to heat the circulating water flowing through the heat exchanger 200.

[0039] The specific transformation methods are as follows:

[0040] The upper steam chamber remains unchanged, and the heating surface composed of the lower furnace 700, smoke pipe 800, etc. is completely removed, and the front cover A1100 and the rear cover A300 of the furnace body are replaced to make the lower half of the furnace body completely empty.

[0041] a. First, remove the bolts connecting the burner 1200 and the boiler body, separate the gas pipeline from the burner 1200, and remove the burner 1200.

[0042] b. Remove the boiler chimney.

[0043] c. Open the inspection doors of the front smoke box 1000 and the rear smoke box 400 of the boiler, cut the welding points at both ends of the smoke pipe 800, and pull out all the smoke pipes 800 from one end.

[0044] d. Cut off the front smoke box tube plate 900 and the rear smoke box tube plate 600.

[0045] e. Open manhole A500 and remove furnace core 700.

[0046] f. Cut off the front smoke box 1000 and the rear smoke box 400, the front sealing plate A1100 of the furnace body and the rear sealing plate A300 of the furnace body.

[0047] g. Replace the furnace body rear sealing plate 3 and the furnace body front sealing plate 19, and open a manhole 5 on one side.

[0048] h. Calculate the electrode size and installation quantity according to the boiler power load, open a corresponding number of installation holes at the bottom of the boiler shell A100, arrange each group of high-voltage electrode assemblies in a straight line, and weld the lower pipe seat 7 for installing the corresponding phase electrode 10.

[0049] i. Weld the pressure plate 4 at an appropriate height inside the furnace body.

[0050] j. Open a mounting hole on the top of the pot shell A100 and weld the corresponding upper pipe seat 11.

[0051] k. Install the components of the lifting mechanism on the pressure plate 4, pass through the upper tube seat 11, install the seal 12, the lifting motor 13, the screw 14, the pivot plate 16 and the connecting rod 17, and install the zero electrode 8 at the same time.

[0052] l. Each phase electrode 10 and protective shield 6 are respectively connected and fixed to the blind plate 9, and are connected and sealed to the lower pipe seat 7 at the electrode mounting hole opened at the bottom of the boiler shell A100.

[0053] m. After the electrode is installed, install the cover plate at manhole 5.

[0054] n. The control cabinet of the high-voltage electrode phase change boiler is equipped with the original gas boiler supporting instruments, etc., which can continue to be used. Automatic operation can be achieved by passing 10KV high voltage electricity into the phase electrode 10.

[0055] After the overall installation is completed, the gas phase change boiler is transformed into an electrode phase change boiler. The whole process is simple and easy, and there is no need to replace the boiler. The existing shell can be used to achieve gas-to-electricity conversion and zero emissions.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high-voltage electrode phase change boiler, comprising a heat exchanger (2) and a high-voltage electrode assembly arranged inside a boiler shell (1); characterized in that: The heat exchanger (2) is arranged on the upper part of the boiler shell (1); the high-voltage electrode assembly comprises a phase electrode (10), a zero electrode (8) and a lifting mechanism; the phase electrode (10) is fixedly mounted on the bottom end of the boiler shell (1), one end of which is connected to the high voltage, and the other end of which extends upward into the inner side of the boiler shell (1); the zero electrode (8) is arranged on the upper side of the phase electrode (10); the zero electrode (8) is connected to the lifting mechanism; and the lifting mechanism is used to carry the zero electrode (8) and adjust the distance between the zero electrode (8) and the phase electrode (10).

2. The high-voltage electrode phase change boiler according to claim 1, characterized in that: The boiler shell (1) is a horizontal structure.

3. The high-voltage electrode phase change boiler according to claim 2, characterized in that: The high-voltage electrode assemblies are provided in multiple groups, the number of which is a multiple of three, and every three groups of high-voltage electrode assemblies form a three-phase electrode unit. The three groups of high-voltage electrode assemblies in each three-phase electrode unit are arranged linearly in a straight line.

4. The high-voltage electrode phase change boiler according to claim 3, characterized in that: The high-voltage electrode assembly further comprises a lower tube seat (7) arranged at the lower end of the boiler shell (1), the lower end of the lower tube seat (7) being connected to a blind plate (9), and the phase electrode (10) being mounted on the blind plate (9) via an insulating sleeve (15).

5. The high-voltage electrode phase change boiler according to claim 4, characterized in that: The upper end of the blind plate (9) is connected to the bottom end of the protective shield (6), the upper end of the protective shield (6) penetrates into the inner side of the boiler shell (1), and the phase electrode (10) and the zero electrode (8) are surrounded by the inner side of the protective shield (6).

6. The high-voltage electrode phase change boiler according to claim 5, characterized in that: The lifting mechanism comprises a lifting motor (13) and a lead screw (14). The lifting motor (13) is arranged at the top end of the boiler shell (1). The output end of the lifting motor (13) is connected to the lead screw (14). The lead screw (14) vertically penetrates into the inner side of the boiler shell (1) downward. The outer side of the lead screw (14) is connected to a pivot plate (16) via a nut. The pivot plate (16) is connected to each of the zero electrodes (8) via a connecting rod (17).

7. The high-voltage electrode phase change boiler according to claim 6, characterized in that: The lead screw (14) is located on the upper and lower sides of the nut and is respectively provided with an upper limit position and a lower limit position.

8. The high-voltage electrode phase change boiler according to claim 7, characterized in that: The top of the protective shield (6) is fixedly connected to a pressure plate (4), the pressure plate (4) is provided with a through hole having a diameter identical to the inner diameter of the protective shield (6), and each of the connecting rods (17) passes through a corresponding through hole and is connected to the zero electrode (8).

9. The high-voltage electrode phase change boiler according to claim 8, characterized in that: A manhole (5) is provided on one side of the boiler housing (1).

10. The high-voltage electrode phase change boiler according to claim 8, characterized in that: The bottom end of the boiler housing (1) is mounted on a base (18).

Images