External adjusting mechanism for liquid level in inner cylinder of electrode steam boiler

Abstract

The utility model discloses an external adjusting mechanism for the liquid level in an inner cylinder of an electrode steam boiler, and solves the problem that the layout structure of an inner cylinder water level control butterfly valve of the existing equipment is easy to cause the pressure loss of the boiler. Inner barrel demineralized water (4) is arranged in the boiler inner barrel (2), and outer barrel demineralized water (12) is arranged at the lower part in the boiler outer barrel (1); a liquid level adjusting water outlet (7) is formed in the bottom end of the boiler inner barrel (2), an inner barrel demineralized water outlet pipe (8) is connected to the liquid level adjusting water outlet (7), the other end of the inner barrel demineralized water outlet pipe (8) penetrates through the side wall of the boiler outer barrel (1) and then is connected with one end of an outer barrel communicating pipe (9), and an inner barrel demineralized water inlet pipe (11) is further arranged on the side wall of the boiler outer barrel (1). The other end of the outside-cylinder communicating pipe is connected with the outer side end of the inner cylinder demineralized water introducing pipe, and an inner cylinder water level electric control butterfly valve (10) is arranged on the outside-cylinder communicating pipe; and pressure loss of the boiler is avoided.

Description

Technical Field

[0001] The utility model relates to an electrode steam boiler, in particular to an external regulating mechanism for the water level of an inner drum in the electrode steam boiler. Background Art

[0002] The electrode steam boiler is a kind of boiler that directly converts electrical energy into thermal energy and produces steam by utilizing the electrical conductivity of water. The outside of the boiler is a closed pressure shell, commonly known as an outer cylinder. An inner cylinder insulated 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. The electrodes heat the desalted water in the inner cylinder to produce steam. A circulating water inlet pipe interface, a circulating water outlet pipe interface and a desalted water supply pipe port are arranged at the bottom of the outer cylinder. A feed water pump is connected to the water supply pipe port, and desalted water is continuously supplied to the boiler through the feed water pump. The circulating water inlet pipe interface outside the outer cylinder is connected to the circulating water outlet pipe interface. An external circulation pipeline is connected between the interfaces of the ring water outlet pipe, 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 interface of the circulating water inlet pipe in the outer cylinder, and the upper end of the inner cylinder water supply pipe is communicated with the cylinder cavity of the inner cylinder, and an inner cylinder water level control electric butterfly valve is arranged on the lower bottom surface of the cylinder cavity of the inner cylinder; the working process of the whole electrode steam boiler is as follows: the desalted water outside the boiler first enters the bottom of the cylinder cavity of the outer cylinder through the water supply pump, and the water at the bottom of the cylinder cavity of the outer cylinder 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, and the inner cylinder The desalted water in the cavity is heated by electrodes to produce steam, 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 set on the 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 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 water level control butterfly valve of the existing electrode steam boiler generally adopts an electric butterfly valve, and the regulating valve stem of the electric butterfly valve is controlled to rotate by an electric control actuator. The furnace is a high-voltage, live working environment. The electric actuator of the regulating valve stem cannot be set in the furnace. 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 to the electric actuator. The electric 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 up. When the valve stem rotates on site, the sealing of the outer cylinder is easily destroyed, resulting in decompression of the boiler and even shutdown. Summary of the invention

[0003] The utility model provides an external regulating mechanism for the liquid level in the inner cylinder of an electrode steam boiler, which solves the technical problem that the arrangement structure of the inner cylinder water level control butterfly valve of the existing equipment easily leads to boiler pressure loss.

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

[0005] The invention discloses an external regulating mechanism for the liquid level in the inner cylinder of an electrode steam boiler, comprising a boiler outer cylinder, a boiler inner cylinder arranged in the boiler outer cylinder, an electrode arranged in the boiler inner cylinder, inner cylinder desalted water arranged in the boiler inner cylinder, a middle and lower part of the electrode immersed in the inner cylinder desalted water, and an outer cylinder desalted water arranged in the lower part of the boiler outer cylinder; a liquid level regulating water outlet is arranged at the bottom end of the boiler inner cylinder, an inner cylinder desalted water outlet pipe is connected to the liquid level regulating water outlet, the other end of the inner cylinder desalted water outlet pipe passes through the side wall of the boiler outer cylinder and is connected to one end of an outer cylinder connecting pipe, an inner cylinder desalted water inlet pipe is also arranged on the side wall of the boiler outer cylinder, the other end of the outer cylinder connecting pipe is connected to the outer end of the inner cylinder desalted water inlet pipe, the inner end of the inner cylinder desalted water inlet pipe is arranged above the outer cylinder desalted water, and an inner cylinder water level electrically controlled butterfly valve is arranged on the outer cylinder connecting pipe.

[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.

[0007] The utility model leads the electric-controlled regulating valve of the liquid level in the inner drum to the outside of the boiler, which can conveniently adjust the water level in the inner drum. By fixing the fixed pipelines for introducing and leading out the liquid level water on the side wall of the boiler, the sealing of the boiler wall is protected, and the occurrence of pressure loss in the boiler is avoided. 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] An external adjustment mechanism for the liquid level in the inner cylinder of an electrode steam boiler comprises a boiler outer cylinder 1, a boiler inner cylinder 2 is arranged in the boiler outer cylinder 1, an electrode 3 is arranged in the boiler inner cylinder 2, the electrode 3 is suspended at the top of the boiler outer cylinder 1 through a suspension mechanism, an inner cylinder desalted water 4 is arranged in the boiler inner cylinder 2, the middle and lower parts of the electrode 3 are immersed in the inner cylinder desalted water 4, the liquid level of the inner cylinder desalted water 4 is adjusted, thereby changing the volume of the middle and lower parts of the electrode 3 immersed in the inner cylinder desalted water 4, so as to adjust the power of the electrode boiler, an outer cylinder desalted water 12 is arranged in the lower part of the boiler outer cylinder 1, and the outer cylinder desalted water 12 is replenished by an external desalted water replenishing mechanism; a liquid level adjustment outlet 7 is arranged at the bottom end of the boiler inner cylinder 2, an inner cylinder desalted water outlet pipe 8 is connected to the liquid level adjustment outlet 7, the other end of the inner cylinder desalted water outlet pipe 8 passes through the side wall of the boiler outer cylinder 1, and is connected to one end of the outer cylinder connecting pipe 9, and an inner cylinder is also arranged on the side wall of the boiler outer cylinder 1 The desalted water inlet pipe 11 and the other end of the outer tube connecting pipe 9 are connected with 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, and an inner tube water level electric control butterfly valve 10 is arranged on the outer tube connecting pipe 9; the first section of the connecting pipe fitting made of metal material, including a vertical section and a 90-degree elbow, is connected to the liquid level regulating outlet 7, the upper part of the vertical section of the connecting pipe fitting is welded to the bottom of the inner tube body, the desalted water in the inner tube enters the vertical section of the pipe fitting through the liquid level regulating outlet 7, and 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, and the highest point of the flange must maintain a sufficient insulation distance from the inner tube body, the outer tube connecting pipe 9 outside the boiler is in a half-mouth shape, and the two ends are fixed and welded to the side wall of the boiler outer tube 1 through holes on the side wall of the boiler outer tube 1, and the inner tube water level electric control butterfly valve 10 can adjust the flow in the pipe within 0%-100%.

[0011] An external circulation water outlet 13, an external circulation water inlet 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 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 demineralized water outside the boiler enters the boiler outer tube 1 through the demineralized water supply port 6 to form the outer tube demineralized water 12, and the outer tube demineralized 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 demineralized water 4, and the inner tube demineralized water 4 is heated by the electrode 3 to generate steam, and the generated steam is transported out through the steam outlet at the top of the boiler.

Claims

1. An externally mounted liquid level regulating mechanism in an inner cylinder of an electrode steam boiler, comprising a boiler outer cylinder (1), a boiler inner cylinder (2) arranged in the boiler outer cylinder (1), and an electrode (3) arranged in the boiler inner cylinder (2), characterized in that: An inner cylinder desalted water (4) is arranged in the inner cylinder (2) of the boiler, the middle and lower parts of the electrodes (3) are immersed in the inner cylinder desalted water (4), and an outer cylinder desalted water (12) is arranged in the lower part of the inner cylinder (1) of the boiler; a liquid level regulating water outlet (7) is arranged at the bottom end of the inner cylinder (2), an inner cylinder desalted water outlet pipe (8) is connected to the liquid level regulating water outlet (7), the other end of the inner cylinder desalted water outlet pipe (8) passes through the side wall of the outer cylinder (1) of the boiler, and is connected to one end of an outer cylinder connecting pipe (9); an inner cylinder desalted water inlet pipe (11) is also arranged on the side wall of the 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).

2. The external adjustment mechanism for the liquid level in the inner cylinder of an electrode steam boiler according to claim 1, characterized in that: An external circulation water outlet (13), an external circulation water inlet (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 outlet (13) and the external circulation water inlet (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 inlet (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).

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