A steam supply system for a self-contained power plant

Abstract

The utility model discloses a self-contained power plant steam supply system, including a steam pipe, wherein the steam pipe is sleeved with a plurality of mounting rings, a plurality of support rods are fixedly mounted on the inner wall of each mounting ring, one end of the plurality of support rods are respectively arranged in contact with the outer wall of the steam pipe, the end of the mounting ring is stepped, the mounting ring is plugged and installed with an adjacent insulation ring in turn, and a rubber pad is used to seal the two to ensure that the temperature does not leak out, the heating ring ensures the internal temperature and reduces the heat loss, and the induction head senses the internal pressure, the induction head can smoothly alarm, thereby determining the approximate range of the pressure leakage, avoiding long-term investigation affecting the maintenance efficiency, and the locking is simple and reliable, and the installation is simple and convenient.

Description

Technical field:

[0001] The utility model relates to the field of chemical production, in particular to a steam supply system for a self-provided power plant. Background technology:

[0002] In the chemical production process, the installed capacity of the self-contained power plant is designed to be 25MW, and the extraction condensing unit is slightly lower in efficiency than the generating units of 300MW and above in terms of operating economy. If the enterprise wants to achieve the economy of small units, it is necessary to improve the overall efficiency of the units.

[0003] In the original design, the main steam inlet temperature of the self-contained power plant averaged 524.5°C, the main steam mother pipe temperature was 525°C, and the main steam temperature of a single boiler was 530°C. Due to energy loss in the original mother pipe steam supply system, the self-contained power plant had poor economy and low energy utilization. The enterprise's self-contained power plant belongs to the mother pipe control, and the carbon emissions accounting of the self-contained power plant needs to be calculated as an overall system.

[0004] The main steam main pipe of the original self-contained power plant is connected to the pipelines of boilers 1, 2 and 3, resulting in large energy losses. Therefore, a new steam supply system is needed to solve the problems of energy loss and poor economy. Utility model content:

[0005] The utility model aims to provide a steam supply system for a self-contained power plant.

[0006] The utility model is implemented by the following technical solutions:

[0007] A steam supply system for a self-contained power plant includes a steam pipe. The steam pipe is sleeved with a plurality of mounting rings. A plurality of support rods are fixedly mounted on the inner wall of each mounting ring. One end of the plurality of support rods is respectively arranged to fit the outer wall of the steam pipe. The end of the mounting ring is stepped. A heat preservation ring is inserted into the side wall of each mounting ring. A heating ring is fixedly embedded on the inner wall of each heat preservation ring. The heating ring is electrically connected to an external power supply through a circuit. An induction head is fixedly mounted on the inner wall of the bottom of each mounting ring. The induction head is connected to an external induction device through an induction member.

[0008] Preferably, multiple locking rods are fixedly connected to both ends of the mounting ring, and multiple locking blocks are fixedly connected to the outer wall of the insulation ring. One end of each locking rod passes through the corresponding locking block and is slidably connected to it. One end of each locking block is provided with a locking groove. A spring tube is hinged in each locking groove through a hinge pin. A spring is provided in each spring tube. The spring is in a stressed and compressed state. A T-shaped slide bar is slidably connected in the spring tube, and one end of the T-shaped slide bar is fixedly connected to a limiting block.

[0009] Preferably, a positioning rod is fixedly connected to one side of the limiting block, a positioning hole is fixedly provided on the side wall of the locking block, and the positioning rod extends into the positioning hole and is slidably connected thereto.

[0010] The advantages of the utility model are as follows: the installation ring is plugged and installed with an adjacent insulation ring in sequence, and the two are sealed with a rubber pad to ensure that the temperature will not leak out. The heating ring ensures the internal temperature and reduces heat loss. The sensor head senses the internal pressure and can smoothly alarm to determine the approximate range of the pressure leakage, avoiding long-term investigation that affects maintenance efficiency. The locking is simple and reliable, and the installation is simple and convenient. Description of the drawings:

[0011] Figure 1 It is a structural diagram of the steam pipeline in the utility model;

[0012] Figure 2 It is a cross-sectional view of the steam pipeline in the utility model;

[0013] Figure 3 It is a system flow diagram of the utility model.

[0014] In the figure: steam pipe 1, support rod 2, mounting ring 3, insulation ring 4, heating ring 5, induction head 6, locking block 7, locking rod 8, locking groove 9, spring tube 10, T-shaped slide bar 11, spring 12, limit block 13. Specific implementation method:

[0015] like Figures 1 to 3 As shown, a steam supply system for a self-contained power plant includes a steam pipe 1, which is sleeved with a plurality of mounting rings 3. A plurality of support rods 2 are fixedly mounted on the inner wall of each mounting ring 3, and one end of each support rod 2 is respectively arranged to fit the outer wall of the steam pipe 1. The end of the mounting ring 3 is stepped, and a heat preservation ring 4 is inserted into the side wall of each mounting ring 3. A heating ring 5 is fixedly embedded on the inner wall of each heat preservation ring 4. The heating ring 5 is electrically connected to an external power supply through a line. A sensing head 6 is fixedly mounted on the inner wall of the bottom of each mounting ring 3. The sensing head 6 is connected to an external sensor through a sensing piece. When installing the heat preservation component, the mounting ring 3 is plugged and installed with an adjacent heat preservation ring 4 in turn, and the two are sealed by a rubber pad to ensure that the temperature will not leak out. The heating ring 5 ensures the internal temperature and reduces heat loss. The sensing head 6 senses the internal pressure. If pressure leakage occurs due to pipeline modification, the sensing head 6 can smoothly alarm, thereby determining the approximate range of the pressure leakage, avoiding long-term investigation and affecting maintenance efficiency.

[0016] A plurality of locking rods 8 are fixedly connected to the two ends of the mounting ring 3, and a plurality of locking blocks 7 are fixedly connected to the outer wall of the insulation ring 4. One end of each locking rod 8 passes through the corresponding locking block 7 and is slidably connected thereto. A locking groove 9 is provided at one end of each locking block 7. A spring cylinder 10 is hinged in each locking groove 9 through a hinge pin. A spring 12 is provided in each spring cylinder 10. The spring 12 is in a stressed and compressed state. A T-shaped slide bar 11 is slidably connected in the spring cylinder 10. One end of the T-shaped slide bar 11 is fixedly connected to a limiting block 13. When locking, the spring cylinder 10 is directly tilted outward, so that the limiting block 13 will pop out under the elastic force of the spring 12, thereby fitting with the corresponding side wall of the locking block 7, thereby ensuring a secure connection between the two.

[0017] A positioning rod is fixedly connected to one side of the limiting block 13 , and a positioning hole is fixedly provided on the side wall of the locking block 7 , and the positioning rod extends into the positioning hole and is slidably connected thereto.

[0018] The transformation process is: changing the main pipe operation mode of the self-provided power plant to a unit operation mode to solve the problem of large carbon emissions from the enterprise's self-provided power plant, moving the main steam pipe of the turbine from the original (12Cr1MoV) main steam pipe to the main steam pipe of boiler No. 4 (12Cr1MoVG), reusing the original electric valves and upper pipes and elbows, fundamentally solving the problem of poor economic operation of the self-provided power plant, and improving the energy utilization rate of the self-provided power plant. With less investment, a new way to improve the economic operation of the self-provided power plant was successfully explored. The initial parameters of the device were increased by 2°C, which reduced the standard coal consumption of the unit and had great economic value. This project considered that the coal used in boiler No. 4 could be accounted for separately, studied and optimized the existing coal supply system, added a coal metering and statistical system at an appropriate location, improved the thermal efficiency of the Rankine cycle, and improved the energy utilization rate of the self-provided power plant.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steam supply system for a self-provided power plant, characterized by: It includes a steam pipe, which is covered with several mounting rings. A plurality of support rods are fixedly mounted on the inner wall of each mounting ring. One end of the plurality of support rods is respectively arranged to fit the outer wall of the steam pipe. The end of the mounting ring is stepped. A thermal insulation ring is inserted into the side wall of each mounting ring. A heating ring is fixedly embedded on the inner wall of each thermal insulation ring. The heating ring is electrically connected to an external power supply through a circuit. An induction head is fixedly mounted on the inner wall of the bottom of each mounting ring. The induction head is connected to an external sensor through an induction piece.

2. A self-contained power plant steam supply system according to claim 1, characterized in that: Multiple locking rods are fixedly connected to the two ends of the mounting ring, and multiple locking blocks are fixedly connected to the outer wall of the insulation ring. One end of each locking rod passes through the corresponding locking block and is slidably connected thereto. One end of each locking block is provided with a locking groove, and a spring cylinder is hinged in each locking groove through a hinge pin. A spring is provided in each spring cylinder, and the spring is in a stressed and compressed state. A T-shaped sliding rod is slidably connected in the spring cylinder, and one end of the T-shaped sliding rod is fixedly connected to a limiting block.

3. A self-contained power plant steam supply system according to claim 2, characterized in that: A positioning rod is fixedly connected to one side of the limiting block, a positioning hole is fixedly arranged on the side wall of the locking block, and the positioning rod extends into the positioning hole and is slidably connected thereto.

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