Energy recovery device for steam pocket downcomer

Abstract

The utility model discloses an energy recovery device for a steam pocket downcomer, which comprises a steam pocket main body and a downcomer connected with the steam pocket main body, and the downcomer is communicated with a kinetic energy conversion device. And the kinetic energy conversion device is used for converting the kinetic energy of the fluid in the downcomer into electric energy and transmitting the electric energy to external equipment or storing the electric energy. According to the energy recovery device, the kinetic energy conversion device is arranged on the descending pipe, so that gravitational potential energy generated when cold water in the steam pocket body falls down can be conveniently converted into electric energy, the electric energy acts on external equipment or is stored, and energy recovery is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler energy recovery, in particular to an energy recovery device for a steam drum downcomer. Background Art

[0002] The steam drum is the most important equipment in a thermal power plant. It is the connecting hub of the three processes of boiler heating, vaporization, and superheating, and plays a connecting role. Under the action of gravity, the cold water in the steam drum flows through the downcomer to the connecting box, and then to the water-cooled wall for heating and circulation.

[0003] In a thermal power plant, the hot water (steam) generated by the boiler enters the steam drum through the riser, so the steam drum is usually set at a higher height (higher than the boiler), while the cold water in the steam drum falls freely through the downcomer under the action of gravity, resulting in energy waste in this process. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides an energy recovery device for a boiler downcomer. The energy recovery device can convert the gravitational potential energy of cold water into electrical energy through a kinetic energy recovery device arranged on the downcomer and act on external processing equipment or storage, thereby realizing energy recovery and effectively improving energy utilization.

[0005] The present invention is implemented in such a way that an energy recovery device for a steam drum downcomer is constructed, comprising a steam drum body and a downcomer connected to the steam drum body, wherein a kinetic energy conversion device is connected to the downcomer, and the kinetic energy conversion device is used to convert the kinetic energy of the fluid in the downcomer into electrical energy and transmit the electrical energy to external equipment or storage.

[0006] Specifically, the downcomer includes an inlet pipe and an outlet pipe, the top of the inlet pipe is connected to the interior of the drum body, the outlet pipe is arranged below the inlet pipe, and the kinetic energy conversion device is connected between the bottom of the inlet pipe and the outlet pipe.

[0007] Specifically, the kinetic energy conversion device includes a shell and a rotating part rotatably arranged inside the shell. The shell is hollow and has a through hole. The shell is connected to the bottom of the inlet pipe and the outlet pipe respectively through the through holes. The rotating part is rotatably arranged in the hollow part inside the shell and is driven to rotate by the fluid flowing downward inside the inlet pipe. The kinetic energy of the fluid is converted into electrical energy through the rotation of the rotating part.

[0008] Specifically, the through-hole end of the shell and the ends of the inlet pipe and the outlet pipe are all provided with connecting flanges, and the shell and the downcomer are connected and sealed via the connecting flanges.

[0009] Specifically, the lower end of the outlet pipe is S-shaped, and an exhaust valve is provided at the highest end of the S-shaped outlet pipe.

[0010] The utility model has the following beneficial effects:

[0011] The energy recovery device can convert the gravitational potential energy of cold water into electrical energy through a kinetic energy conversion device arranged on the downcomer and act on external processing equipment or storage, thereby realizing energy recovery and effectively improving energy utilization.

[0012] The energy recovery device connects the kinetic energy conversion device and the downcomer by arranging a flange, thereby facilitating sealing.

[0013] The energy recovery device is configured to have an S-shaped outlet pipe and an exhaust valve, which can facilitate the exhaust of internal air, so that the water in the outlet pipe can flow out completely and avoid air entrainment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the specific embodiments of the present invention, they are used to explain the present invention but do not constitute any limitation to the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the connection between the kinetic energy conversion device of the utility model and the downcomer;

[0017] In the figure: 1. Steam drum body; 2. Downcomer; 2.1. Inlet pipe; 2.2. Outlet pipe; 3. Kinetic energy conversion device; 3.1. Outer casing; 3.2. Rotating part; 4. Connecting flange; 5. Exhaust valve. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described in detail below through specific embodiments in combination with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention in any way. The accompanying drawings in the present invention are only used to assist in the description of the embodiments and to facilitate understanding and are not intended to limit the present invention in any way.

[0019] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0020] As described in the background art, the steam drum in a thermal power plant is installed at a high height, and the cold water inside falls from a high altitude, resulting in energy waste in the process.

[0021] For the reasons mentioned above, please refer to the attached Figure 1 ~Attached Figure 2 The utility model provides an energy recovery device for a steam drum downcomer, comprising a steam drum body 1 and a downcomer 2 connected to the steam drum body 1, wherein the downcomer 2 is connected to a kinetic energy conversion device 3, and the kinetic energy conversion device 3 is used to convert the kinetic energy of the fluid in the downcomer 2 into electrical energy and transmit the electrical energy to external equipment or storage.

[0022] Specifically, the downcomer 2 includes an inlet pipe 2.1 and an outlet pipe 2.2. The top of the inlet pipe 2.1 is connected to the interior of the drum body 1, and the outlet pipe 2.2 is arranged below the inlet pipe 2.1. The kinetic energy conversion device 3 is connected between the bottom of the inlet pipe 2.1 and the outlet pipe 2.2.

[0023] Specifically, the kinetic energy conversion device 3 includes a shell 3.1 and a rotating member 3.2 rotatably arranged inside the shell 3.1 (as can be seen from the accompanying drawings, the rotating member includes a rotating shaft and rotating blades arranged at the outer end of the rotating shaft). The shell 3.1 is hollow inside and is provided with a through hole. The shell 3.1 is respectively connected to the bottom of the inlet pipe 2.1 and the outlet pipe 2.2 through the through hole. The rotating member 3.2 is rotatably arranged in the hollow part of the shell 3.1 and is driven to rotate by the fluid flowing downward from the inlet pipe 2.1. The kinetic energy of the fluid is converted into electrical energy through the rotation of the rotating member 3.2.

[0024] The principle of this energy conversion can refer to the principle of existing hydropower generation, that is, the power generation principle of a water turbine.

[0025] Specifically, the through-hole end of the shell 3.1 and the ends of the inlet pipe 2.1 and the outlet pipe 2.2 are all provided with connecting flanges 4, and the shell 3.1 is connected to the downcomer 2 through the connecting flanges 3 to achieve a sealed connection.

[0026] The through hole end of the shell is connected to the inlet pipe and the outlet pipe end respectively through the connecting flange, which is convenient for placing O-rings at the connection to achieve sealing.

[0027] Specifically, the lower end of the outlet pipe 2.2 is S-shaped, and an exhaust valve 5 is provided at the highest end of the S-shaped outlet pipe.

[0028] The outlet pipe is set to be S-shaped and an exhaust valve is provided to facilitate water storage, so that the outlet pipe is full of water when discharging water, and cold water is prevented from flowing out mixed with air and splashing randomly.

[0029] The energy recovery device is activated based on the operation of the steam drum. When the steam drum is running, cold water flows from the lower end of the steam drum into the downcomer 2 and then into the shell 3.1 of the kinetic energy conversion device 3. The gravitational potential energy of the cold water drives the rotating part 3.2 to rotate. During the rotation process, the rotating part 3.2 converts mechanical energy into electrical energy for storage or directly acts on external processing equipment, achieving the purpose of energy recovery at the high water level in the downcomer, thereby improving energy utilization.

[0030] The above description is a detailed description of the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. An energy recovery device for a steam drum downcomer, comprising a steam drum body and a downcomer connected to the steam drum body, characterized in that: A kinetic energy conversion device is provided on the downcomer, and the kinetic energy conversion device is used to convert the kinetic energy of the fluid in the downcomer into electrical energy and transmit the electrical energy to external equipment or storage.

2. The energy recovery device for a steam drum downcomer according to claim 1, characterized in that: The downcomer includes an inlet pipe and an outlet pipe, the top of the inlet pipe is connected to the interior of the drum body, the outlet pipe is arranged below the inlet pipe, and the kinetic energy conversion device is connected between the bottom of the inlet pipe and the outlet pipe.

3. The energy recovery device for a steam drum downcomer according to claim 2, characterized in that: The kinetic energy conversion device includes a shell and a rotating part rotatably arranged inside the shell. The shell is hollow and has a through hole. The shell is connected to the bottom of the inlet pipe and the outlet pipe respectively through the through holes. The rotating part is rotatably arranged in the hollow part inside the shell and is driven to rotate by the fluid flowing downward inside the inlet pipe. The kinetic energy of the fluid is converted into electrical energy through the rotation of the rotating part.

4. The energy recovery device for a steam drum downcomer according to claim 3, characterized in that: The through hole end of the shell and the ends of the inlet pipe and the outlet pipe are all provided with connecting flanges, and the shell and the downcomer are connected through the connecting flanges to achieve a sealed connection.

5. The energy recovery device for a steam drum downcomer according to claim 2, characterized in that: The lower end of the outlet pipe is S-shaped, and an exhaust valve is provided at the highest end of the S-shape of the outlet pipe.

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