Semi-immersed electrode steam boiler capable of stably operating

Abstract

The utility model discloses a semi-immersed electrode steam boiler capable of stably operating, which realizes stable and safe operation of the boiler. The boiler inner cylinder (2) is arranged on the upper middle portion in the boiler outer cylinder (1), inner cylinder demineralized water (4) is arranged in the boiler inner cylinder (2), outer cylinder demineralized water (12) is arranged on the lower portion in the boiler outer cylinder (1), an electrode insulating base (17) is arranged at the top end of the boiler outer cylinder (1), a porcelain insulator (18) and a conducting rod (19) are arranged on the electrode insulating base (17), and an electrode (3) is connected to the lower end of the conducting rod (19). A porcelain insulator annular tray (20) is arranged in the middle of a conducting rod (19) in a boiler outer barrel (1), an anti-discharge annular fan cover (21) is arranged on the porcelain insulator annular tray, and the lower end of a porcelain insulator (18) is arranged above the anti-discharge annular fan cover. And the discharge phenomenon in the operation of the electrode steam boiler is greatly reduced.

Description

Technical Field

[0001] The utility model relates to an electrode boiler, in particular to a semi-submerged electrode steam boiler which can operate stably. Background Art

[0002] An electrode steam boiler is a type of boiler that utilizes the electrical conductivity of water to directly convert electrical energy into thermal energy and generate steam. The exterior of the boiler is a closed pressure shell, commonly known as an outer cylinder. An inner cylinder insulated and isolated from the outer cylinder is arranged in the middle and upper part of the outer cylinder. Electrodes are arranged in the desalted water of the inner cylinder, and the electrodes heat the desalted water in the inner cylinder to generate steam. An electrode insulating seat is arranged at the top of the outer cylinder of the boiler, and an insulating porcelain bottle that penetrates into the interior of the outer cylinder is arranged in the electrode insulating seat. A conductive rod is arranged in the insulating porcelain bottle, and the lower end of the conductive rod passes through the insulating porcelain bottle from the outside to the inside and is suspended in the inner cylinder. An electrode is connected to the lower end of the conductive rod, and the electrode is immersed in the desalted water in the inner cylinder. Due to the high voltage level of the conductive rod, the insulating porcelain bottle in the existing electrode steam boiler is in operation. Discharge is likely to occur between the conductive rod at the bottom and the outer cylinder of the boiler, causing emergency shutdown of the boiler. How to overcome this discharge phenomenon has become a problem that needs to be solved during on-site operation; a circulating water inlet pipe interface, a circulating water outlet pipe interface and a desalted water supply pipe port are respectively arranged at the bottom of the outer cylinder of the boiler; a feed water pump is connected to the supply water pipe port, and desalted water is continuously replenished to the boiler through the feed water pump; an external circulation pipeline is connected between the circulating water inlet pipe interface and the circulating water outlet pipe interface outside the outer cylinder, and an external circulation water pump and a valve are respectively arranged on the external circulation pipeline; an inner cylinder water supply pipe is connected to the circulating water inlet pipe interface inside the outer cylinder, the upper end of the inner cylinder water supply pipe is connected to the cylinder cavity of the inner cylinder, and an inner cylinder water level control circuit is arranged on the lower bottom surface of the cylinder cavity of the inner cylinder. Control butterfly valve; The working process of the entire electrode steam boiler is as follows: the desalted water outside the boiler first enters the bottom of the outer cylinder cavity through the water supply pump, and the water at the bottom of the outer cylinder cavity then passes through the external circulation pipeline and the external circulation water pump, valve and inner cylinder water supply pipe thereon in turn, and enters the cylinder cavity of the inner cylinder. The desalted water in the inner cylinder cavity generates steam after passing through the electrode, and the steam is discharged through the steam discharge pipe at the top of the boiler; The regulation of the boiler steam volume is achieved by controlling the inner cylinder water level control butterfly valve arranged on the lower bottom surface of the inner cylinder cavity, and the water level in the inner cylinder is regulated by controlling the inner cylinder water level electric control butterfly valve. When the inner cylinder water level control butterfly valve is opened, the desalted water in the inner cylinder will be discharged to the lower part of the outer cylinder, thereby realizing the regulation of the inner cylinder water level; The inner cylinder of the existing electrode steam boiler The water level control butterfly valve generally adopts an electric butterfly valve. Since the regulating valve stem of the electric butterfly valve is controlled to rotate by an electric control actuator, and since the boiler is a high-voltage and live working environment, the electric control actuator of the regulating valve stem cannot be set in the furnace for working operation. The existing equipment sets the valve body of the electric butterfly valve in the boiler, extends the valve stem of the electric butterfly valve to the outside of the boiler, and then connects it with the electric control actuator. The electric control actuator is controlled outside the furnace to realize the switching operation of the electric butterfly valve. Since the outer cylinder is a closed pressurized shell, the rotating valve stem needs to pass through the closed and insulated shell wall, and a complex and reliable sealing mechanism needs to be set. When the valve stem rotates on site, it is easy to cause the sealing of the outer cylinder to be destroyed, resulting in boiler decompression and even shutdown.How to overcome the defect of boiler decompression caused by the need to adjust the liquid level in the inner tube and the rotating valve stem of the liquid level regulating electric butterfly valve is another problem that needs to be solved on site. ; Summary of the invention

[0003] The utility model provides a semi-submerged electrode steam boiler which can operate stably, thereby realizing stable and safe operation of the boiler.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A semi-submerged electrode steam boiler capable of stable operation comprises a boiler outer cylinder, a boiler inner cylinder and an electrode, wherein the boiler inner cylinder is arranged in the middle and upper part of the boiler outer cylinder, inner cylinder desalted water is arranged in the boiler inner cylinder, outer cylinder desalted water is arranged in the lower part of the boiler outer cylinder, an electrode insulating seat is arranged at the top of the boiler outer cylinder, an insulating porcelain bottle is arranged on the electrode insulating seat, a conductive rod is arranged in the insulating porcelain bottle, the lower end of the conductive rod passes through the insulating porcelain bottle and is suspended above the boiler inner cylinder, the electrode is connected to the lower end of the conductive rod, the middle and lower part of the electrode is immersed in the inner cylinder desalted water, an insulating porcelain bottle annular tray is arranged in the middle of the conductive rod in the boiler outer cylinder, an anti-discharge annular fan cover is arranged on the insulating porcelain bottle annular tray, and the lower end of the insulating porcelain bottle is provided with a conductive rod. The end is arranged above the anti-discharge annular fan cover; a liquid level regulating outlet is arranged at the bottom end of the boiler inner tube, and the liquid level regulating outlet is connected with the inner tube desalted water outlet pipe, the other end of the inner tube desalted water outlet pipe passes through the side wall of the boiler outer tube, and is connected with one end of the outer tube connecting pipe, an inner tube desalted water inlet pipe is also arranged on the side wall of the boiler outer tube, the other end of the outer tube connecting pipe is connected with the outer end of the inner tube desalted water inlet pipe, the inner end of the inner tube desalted water inlet pipe is arranged above the outer tube desalted water, and an inner tube water level electric-controlled butterfly valve is arranged on the outer tube connecting pipe; a steam outlet is arranged in the middle of the top end of the boiler outer tube, and the steam generated after the electrode reacts with the inner tube desalted water is output to the outside of the boiler through the steam outlet.

[0006] An external circulation water outlet, an external circulation water inlet and a desalted water supply port are respectively arranged at the lower end of the boiler outer tube, an external circulation pipeline is arranged between the external circulation water outlet and the external circulation water inlet, and an external circulation pump is arranged on the external circulation pipeline; the external circulation water inlet in the boiler outer tube is connected with an inner tube delivery pipeline, and the other end of the inner tube delivery pipeline passes through the lower bottom surface of the boiler inner tube and is arranged in the boiler inner tube; the boiler inner tube is divided into three chambers by a partition, and the three chambers are arranged in a central symmetrical manner about the axis of the inner tube body, thereby ensuring the stable balance of the three-phase load; three inner tube delivery pipelines in parallel are connected to the external circulation water inlet, and the desalted water is respectively delivered to the three chambers, and an electrode insulation seat is arranged in the part passing through the outer tube body, which ensures sealing while also achieving electrical insulation between the electrode and the outer tube body; a wire mesh separator is arranged below the steam outlet to filter the output steam to improve the dryness of the output steam.

[0007] The utility model aims at the defect that, when the existing electrode steam boiler is in operation, discharge phenomenon is easy to occur due to the limited length of the insulating porcelain bottle in the furnace due to the high voltage level. The utility model utilizes the existing structure of the annular tray of the insulating porcelain bottle in the furnace, arranges the anti-discharge annular fan cover with an isolation function on the conductive rod, and arranges the anti-discharge isolation cover between the metal furnace body and the nearest conductive rod, thereby avoiding the occurrence of discharge phenomenon in the operation of the electrode steam boiler; the electric control regulating valve of the liquid level of the inner drum is led out of the boiler, the water level of the inner drum can be conveniently adjusted, and the fixed pipelines for introducing and leading out the liquid level water are fixedly arranged on the side wall of the boiler, thereby protecting the sealing of the boiler furnace wall and avoiding the occurrence of pressure loss in the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model. Implementation

[0009] The utility model is described in detail below with reference to the accompanying drawings:

[0010] A semi-submerged electrode steam boiler capable of stable operation comprises a boiler outer tube 1, a boiler inner tube 2 and an electrode 3, wherein the boiler inner tube 2 is arranged in the middle and upper part of the boiler outer tube 1, inner tube desalted water 4 is arranged in the boiler inner tube 2, outer tube desalted water 12 is arranged in the lower part of the boiler outer tube 1, an electrode insulating seat 17 is arranged at the top of the boiler outer tube 1, an insulating porcelain bottle 18 is arranged on the electrode insulating seat 17, a conductive rod 19 is arranged in the insulating porcelain bottle 18, the lower end of the conductive rod 19 passes through the insulating porcelain bottle 18 and is suspended above the boiler inner tube 2, the lower end of the conductive rod 19 is connected to the electrode 3, the middle and lower part of the electrode 3 is immersed in the inner tube desalted water 4, and the liquid level of the inner tube desalted water 4 is adjusted to change the middle and lower part of the electrode 3 immersed in the inner tube The volume in the desalted water 4 is used to adjust the power of the electrode boiler. An insulating porcelain bottle annular tray 20 is provided in the middle of the conductive rod 19 in the boiler outer tube 1. The insulating porcelain bottle 18 provided on the electrode insulating seat 17 extends downward into the boiler outer tube 1. Since the boiler outer tube 1 is made of metal, the voltage level of the alternating current passed through the conductive rod 19 is relatively high. The conductive rod 19 is insulated from the shell of the boiler outer tube 1 through the insulating porcelain bottle 18. Due to the influence of various factors, the insulating porcelain bottle 18 cannot be set too long, resulting in the shortest distance between the conductive rod at the lower end of the insulating porcelain bottle 18 and the shell of the boiler outer tube 1 cannot meet the minimum discharge distance requirement. An anti-discharge annular fan cover 21 is provided on the insulating porcelain bottle annular tray 20. The insulating porcelain bottle 18 The lower end of the boiler is arranged above the anti-discharge annular fan cover 21. By setting the anti-discharge annular fan cover 21, the conductive rod at the lower end of the insulating porcelain bottle 18 is protected and shielded, and the discharge channel is isolated. The structure is simple and the effect is obvious. A liquid level regulating water outlet 7 is arranged at the bottom end of the boiler inner tube 2. An inner tube desalted water outlet pipe 8 is connected to the liquid level regulating water outlet 7. The other end of the inner tube desalted water outlet pipe 8 passes through the side wall of the boiler outer tube 1 and is connected to one end of the outer tube connecting pipe 9. An inner tube desalted water inlet pipe 11 is also arranged on the side wall of the boiler outer tube 1. The other end of the outer tube connecting pipe 9 is connected to the outer end of the inner tube desalted water inlet pipe 11. The inner end of the inner tube desalted water inlet pipe 11 is arranged above the outer tube desalted water 12. An inner cylinder water level electric butterfly valve 10 is arranged on the external connecting pipe 9, and a connecting pipe fitting of the first section made of metal, including a vertical section and a 90-degree elbow, is connected to the liquid level regulating water outlet 7. The upper part of the vertical section of the connecting pipe fitting is welded to the bottom of the inner cylinder body, and the desalted water in the inner cylinder enters the vertical section of the pipe fitting through the liquid level regulating water outlet 7. A horizontal pipe section made of polytetrafluoroethylene is connected to the 90-degree elbow, and the horizontal pipe section is connected to the 90-degree elbow through a flange. The highest point of the flange must maintain a sufficient insulation distance from the inner cylinder body. The outer cylinder connecting pipe 9 outside the boiler is in a half-mouth shape, and both ends are fixedly welded to the side wall of the boiler outer cylinder 1 through holes on the side wall of the boiler outer cylinder 1. The inner cylinder water level electric butterfly valve 10 can adjust the flow rate in the pipe within 0%-100%;A steam outlet 23 is provided at the middle of the top of the boiler outer tube 1, and the steam 22 generated by the reaction between the electrode 3 and the deionized water 4 in the inner tube is output to the outside of the boiler through the steam outlet 23. ;

[0011] An external circulation water outlet 13, an external circulation water inlet 16 and a desalted water supply port 6 are respectively arranged at the lower end of the boiler outer tube 1, an external circulation pipeline 14 is arranged between the external circulation water outlet 13 and the external circulation water inlet 16, and an external circulation pump 15 is arranged on the external circulation pipeline 14; the external circulation water inlet 16 in the boiler outer tube 1 is connected with the inner tube delivery pipeline 5, and the other end of the inner tube delivery pipeline 5 passes through the lower bottom surface of the boiler inner tube 2 and is arranged in the boiler inner tube 2; the desalted water outside the boiler enters the boiler outer tube 1 through the desalted water supply port 6 to form the outer tube desalted water 12, and the outer tube desalted water 12 enters the boiler outer tube 1 again after external circulation through the external circulation pipeline 14 and the external circulation pump 15, and enters the boiler inner tube 2 through the inner tube delivery pipeline 5 to form the inner tube desalted water 4, and the inner tube desalted water 4 reacts with the energized electrode 3 to generate steam, and the produced steam is transported out through the steam outlet at the top of the boiler.

Claims

1. A semi-submerged electrode steam boiler capable of stable operation, comprising a boiler outer cylinder (1), a boiler inner cylinder (2) and an electrode (3), wherein the boiler inner cylinder (2) is arranged at the middle and upper part of the boiler outer cylinder (1), inner cylinder desalted water (4) is arranged in the boiler inner cylinder (2), outer cylinder desalted water (12) is arranged at the lower part of the boiler outer cylinder (1), an electrode insulating seat (17) is arranged at the top of the boiler outer cylinder (1), an insulating porcelain bottle (18) is arranged on the electrode insulating seat (17), a conductive rod (19) is arranged in the insulating porcelain bottle (18), the lower end of the conductive rod (19) passes through the insulating porcelain bottle (18) and is suspended above the boiler inner cylinder (2), the lower end of the conductive rod (19) is connected to the electrode (3), and the middle and lower part of the electrode (3) is immersed in the inner cylinder desalted water (4), characterized in that: An insulating porcelain bottle annular tray (20) is provided at the middle of the conductive rod (19) in the boiler outer tube (1), an anti-discharge annular fan cover (21) is provided on the insulating porcelain bottle annular tray (20), and the lower end of the insulating porcelain bottle (18) is arranged above the anti-discharge annular fan cover (21); a liquid level regulating outlet (7) is provided at the bottom end of the boiler inner tube (2), an inner tube desalted water outlet pipe (8) is connected to the liquid level regulating outlet (7), and the other end of the inner tube desalted water outlet pipe (8) passes through the side wall of the boiler outer tube (1) and is connected to one end of the outer tube connecting pipe (9) An inner cylinder desalted water inlet pipe (11) is also provided on the side wall of the boiler outer cylinder (1), the other end of the outer cylinder connecting pipe (9) is connected to the outer end of the inner cylinder desalted water inlet pipe (11), the inner end of the inner cylinder desalted water inlet pipe (11) is arranged above the outer cylinder desalted water (12), and an inner cylinder water level electric control butterfly valve (10) is arranged on the outer cylinder connecting pipe (9); a steam outlet (23) is provided in the middle of the top end of the boiler outer cylinder (1), and steam (22) generated by the reaction between the electrode (3) and the inner cylinder desalted water (4) is output to the outside of the boiler through the steam outlet (23).

2. A semi-submerged electrode steam boiler capable of stable operation according to claim 1, characterized in that: An external circulation water output port (13), an external circulation water input port (16) and a demineralized water supply port (6) are respectively arranged at the lower end of the boiler outer tube (1); an external circulation pipeline (14) is arranged between the external circulation water output port (13) and the external circulation water input port (16); an external circulation pump (15) is arranged on the external circulation pipeline (14); an inner tube delivery pipeline (5) is connected to the external circulation water input port (16) in the boiler outer tube (1); the other end of the inner tube delivery pipeline (5) passes through the lower bottom surface of the boiler inner tube (2) and is arranged in the boiler inner tube (2); a wire mesh separator (24) is arranged below the steam outlet (23).

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