Integrated temperature and pressure reduction device based on pressure control and working method

Abstract

The invention provides an integrated temperature and pressure reduction device based on pressure control and a working method, and belongs to the technical field of steam utilization. The problems that in the prior art, temperature and pressure reduction operation of steam is difficult to achieve efficiently and accurately, and the steam utilization efficiency and safety are affected are solved. The temperature and pressure reducing valve comprises a main flowing pipe, a temperature and pressure reducing cavity, an inner sealing face, an outer sealing face and a pressure control spring, a temperature and pressure reducing water inlet is formed in the upper portion of the main flowing pipe, the temperature and pressure reducing cavity is installed in the main flowing pipe, the temperature and pressure reducing water inlet is communicated with the temperature and pressure reducing cavity, and the inner sealing face is arranged on the inner wall of the main flowing pipe. An inner sealing face is arranged on the outer wall of the temperature and pressure reduction cavity, an outer sealing face is arranged on the outer wall of the temperature and pressure reduction cavity and makes contact with the inner sealing face in a matched mode, a plurality of runners are arranged at the tail end of the temperature and pressure reduction cavity, the pressure control spring is installed between the outer wall of the tail end of the temperature and pressure reduction cavity and the inner wall of the flowing main pipe, and the initial state of the pressure control spring is a compressed state. The device is mainly used for reducing temperature and pressure.

Description

Technical Field

[0001] This invention belongs to the field of steam utilization technology, and in particular relates to an integrated desuperheating and pressure reducing device based on pressure control and its working method. Background Technology

[0002] In the steam utilization process of industrial production, the main source of steam is usually various industrial boilers. The steam produced often has a high initial temperature and pressure, and it is often necessary to de-temperature and de-pressure the high-temperature and high-pressure steam to meet the requirements of subsequent equipment or processes.

[0003] Currently, desuperheating and pressure reducing devices suffer from problems such as redundant structural components, complex piping, large footprint, and cumbersome installation and commissioning. Furthermore, their control accuracy relies on traditional algorithms, resulting in a delayed response to steam parameter fluctuations and poor stability. Consequently, they are unable to efficiently and accurately achieve steam desuperheating and pressure reducing operations, which affects the efficiency and safety of steam utilization. Summary of the Invention

[0004] In view of this, the present invention aims to propose an integrated desuperheating and depressurization device and its working method based on pressure control, so as to solve the problem that it is difficult to achieve efficient and accurate desuperheating and depressurization of steam in the prior art, which affects the efficiency and safety of steam utilization.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An integrated desuperheating and depressurization device based on pressure control includes a main flow pipe, a desuperheating and depressurization chamber, an inner sealing surface, an outer sealing surface, and a pressure control spring. A desuperheating water inlet is located above the main flow pipe. The desuperheating and depressurization chamber is installed inside the main flow pipe, and the desuperheating water inlet communicates with the desuperheating and depressurization chamber. An inner sealing surface is located on the inner wall of the main flow pipe, and an outer sealing surface is located on the outer wall of the desuperheating and depressurization chamber. The outer sealing surface and the inner sealing surface are in contact. Multiple flow channels are located at the end of the desuperheating and depressurization chamber. The pressure control spring is installed between the outer wall of the end of the desuperheating and depressurization chamber and the inner wall of the main flow pipe. The pressure control spring is initially in a compressed state.

[0006] Furthermore, the de-cooling and de-pressure chamber is provided with a main opening corresponding to the de-cooling water inlet, and a number of secondary openings are provided on one side of the main opening.

[0007] Furthermore, a limiting spring is provided between the outer wall of the first end of the de-cooling and de-pressure chamber and the inner wall of the main flow pipe.

[0008] Furthermore, the connection points between the main flow pipe and the limiting spring and the pressure control spring are all provided with limiting bosses.

[0009] Furthermore, both ends of the main flow pipe are equipped with flange connections.

[0010] Furthermore, the outer sealing surface and the inner sealing surface are fitted together by a profile adaptation.

[0011] A method for operating an integrated desuperheating and pressure reducing device based on pressure control includes the following steps: Step 1: Steam enters the main flow pipe and then enters the desuperheating and pressure reducing chamber. Under the action of steam pressure, the desuperheating and pressure reducing chamber will be subjected to thrust. At this time, the steam pressure is higher than the pressure value of the pressure control spring. The desuperheating and pressure reducing chamber and the main flow pipe are sealed by the cooperation of the outer sealing surface and the inner sealing surface. Step 2: At the same time, the desuperheating water enters the desuperheating and depressurization chamber through the desuperheating water inlet, the main opening and the auxiliary opening. The desuperheating water mixes with the steam, and the steam is fully mixed in the desuperheating and depressurization chamber to achieve desuperheating and depressurization. Step 3: As the desuperheating and depressurization process proceeds, the steam pressure gradually decreases. When the pressure drops to the preset pressure value of the pressure control spring and the compression force of the pressure control spring is greater than the steam pressure, the desuperheating and depressurization chamber will pop open. At this time, the steam that has reached the preset pressure will flow out through multiple channels at the end of the desuperheating and depressurization chamber.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention has a simple and compact structure, realizing an integrated design for temperature and pressure reduction, and simplifying the installation and maintenance process of the equipment.

[0013] 2. This invention utilizes a pressure control spring to achieve pressure-based automatic control, which can accurately control the steam pressure within a preset range. At the same time, the limit spring restricts the movement range of the de-heating and de-pressure chamber, ensuring the stability and reliability of the device operation.

[0014] 3. This invention limits the flow rate of desuperheating water by coordinating the movement of the desuperheating and pressure-reducing chamber with the desuperheating water inlet, thus avoiding the problem of excessively low steam pressure and further improving the safety and practicality of the device.

[0015] 4. The present invention improves the efficiency and uniformity of steam desuperheating and depressurization by the tight fit between the inner sealing surface of the main flow pipe and the outer sealing surface of the desuperheating and depressurization chamber, as well as the design of the main opening, secondary opening and end flow channel on the desuperheating and depressurization chamber. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a cross-sectional view of an integrated de-temperature and pressure reducing device based on pressure control according to the present invention. Figure 2This is a cross-sectional view of the flow main pipe described in this invention; Figure 3 This is a schematic diagram of the structure of the de-cooling and de-pressure chamber described in this invention; Figure 4 This is a schematic diagram of the limiting spring described in this invention; Figure 5 This is a schematic diagram of the pressure control spring described in this invention.

[0017] In the picture: 1-Flow main pipe, 11-Desuperheating water inlet, 12-Flange connection, 13-Inner sealing surface, 14-Limiting boss, 2-Limiting spring, 3-Desuperheating and pressure reducing cavity, 31-Main opening, 32-Secondary opening, 33-Outer sealing surface, 34-Flow channel, 4-Pressure control spring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0019] Detailed Implementation Method 1: See Figure 1-5 This embodiment describes an integrated desuperheating and depressurization device based on pressure control, comprising a main flow pipe 1, a desuperheating and depressurization chamber 3, an inner sealing surface 13, an outer sealing surface 33, and a pressure control spring 4. A desuperheating water inlet 11 is provided above the main flow pipe 1. The desuperheating and depressurization chamber 3 is installed inside the main flow pipe 1 and communicates with the desuperheating and depressurization chamber 3. The inner wall of the main flow pipe 1 is provided with an inner sealing surface 13, and the outer wall of the desuperheating and depressurization chamber 3 is provided with an outer sealing surface 33. The outer sealing surface 33 and the inner sealing surface 13 are in contact. Multiple flow channels 34 are provided at the end of the desuperheating and depressurization chamber 3. The pressure control spring 4 is installed between the outer wall of the end of the desuperheating and depressurization chamber 3 and the inner wall of the main flow pipe 1. The pressure control spring 4 is initially in a compressed state.

[0020] High-temperature high-speed rail steam enters the main flow pipe 1 and then enters the desuperheating and pressure reducing chamber 3. Under the action of steam pressure, the desuperheating and pressure reducing chamber 3 will be subjected to thrust. At this time, the steam pressure is higher than the pressure value of the pressure control spring 4. The desuperheating and pressure reducing chamber 3 and the main flow pipe 1 are sealed by the cooperation of the outer sealing surface 33 and the inner sealing surface 13. At the same time, desuperheating water enters the desuperheating and pressure reducing chamber 3 through the desuperheating water inlet 11, the main opening 31 and the auxiliary opening 32. The desuperheating water and steam are mixed. The steam is fully mixed in the desuperheating and pressure reducing chamber 3 to carry out desuperheating and pressure reducing. As the desuperheating and pressure reducing process proceeds, the steam pressure gradually decreases. When the pressure drops to the preset pressure value of the pressure control spring 4, the compression force of the pressure control spring 4 is greater than the steam pressure, which will cause the desuperheating and pressure reducing chamber 3 to pop open. At this time, the steam that has reached the preset pressure flows out through the multiple flow channels 34 at the end of the desuperheating and pressure reducing chamber 3.

[0021] In this embodiment, the desuperheating and pressure reducing chamber 3 is provided with a main opening 31 corresponding to the desuperheating water inlet 11. A number of secondary openings 32 are provided on one side of the main opening 31. During the movement of the desuperheating and pressure reducing chamber 3, the relative positions of the main opening 31 and the number of secondary openings 32 above it and the desuperheating water inlet 11 change. At this time, the desuperheating water inlet 11 and the secondary openings 32 are matched. Through this coordination of different positions, the flow rate of the desuperheating water can be limited to avoid the steam pressure being too low due to excessive desuperheating water.

[0022] In this embodiment, a limiting spring 2 is provided between the outer wall of the first end of the de-cooling and de-pressure chamber 3 and the inner wall of the main flow pipe 1. The limiting spring 2 will restrict the movement of the de-cooling and de-pressure chamber 3, ensuring that it moves within a reasonable range.

[0023] In this embodiment, the connection points of the main flow pipe 1 with the limiting spring 2 and the pressure control spring 4 are all provided with limiting bosses 14 to limit and fix the limiting spring 2 and the pressure control spring 4.

[0024] In this embodiment, flange connection ports 12 are installed at both ends of the flow main pipe 1.

[0025] In this embodiment, the outer sealing surface 33 and the inner sealing surface 13 are matched by profile adaptation to guide and constrain the flow path of steam in the main flow pipe 1.

[0026] Detailed Implementation Method 2: See Figure 1-5 This embodiment describes a method for operating an integrated desuperheating and pressure reducing device based on pressure control, which includes the following steps: Step 1: High-temperature and high-pressure steam enters the interior of the main flow pipe 1 and then enters the de-cooling and pressure-reducing chamber 3. Under the action of steam pressure, the de-cooling and pressure-reducing chamber 3 will be subjected to thrust. At this time, the steam pressure is higher than the pressure value of the pressure control spring 4. The de-cooling and pressure-reducing chamber 3 and the main flow pipe 1 are sealed by the cooperation of the outer sealing surface 33 and the inner sealing surface 13. Step 2: At the same time, the desuperheating water enters the desuperheating and depressurization chamber 3 through the desuperheating water inlet 11, the main opening 31 and the auxiliary opening 32. The desuperheating water mixes with the steam, and the steam is fully mixed in the desuperheating and depressurization chamber 3 to achieve desuperheating and depressurization. Step 3: As the de-cooling and de-pressure process proceeds, the steam pressure gradually decreases. When the pressure drops to the preset pressure value of the pressure control spring 4, and the compression force of the pressure control spring 4 is greater than the steam pressure, the de-cooling and de-pressure chamber 3 will pop open. At this time, the steam that has reached the preset pressure will flow out through the multiple flow channels 34 at the end of the de-cooling and de-pressure chamber 3.

[0027] The specific embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific embodiments described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A pressure control based integrated pressure and temperature reducing device, characterized in that: Including flow main pipe (1), temperature reducing pressure reducing cavity (3), inner sealing surface (13), outer sealing surface (33) and pressure control spring (4), the flow main pipe (1) top is equipped with temperature reducing water inlet (11), the temperature reducing pressure reducing cavity (3) is installed in flow main pipe (1), temperature reducing water inlet (11) with temperature reducing pressure reducing cavity (3) communication, flow main pipe (1) inner wall is equipped with inner sealing surface (13), temperature reducing pressure reducing cavity (3) outer wall is equipped with outer sealing surface (33), outer sealing surface (33) with inner sealing surface (13) contact, temperature reducing pressure reducing cavity (3) end is equipped with multiple flow channel (34), pressure control spring (4) is installed between temperature reducing pressure reducing cavity (3) end outer wall and flow main pipe (1) inner wall, the initial state of pressure control spring (4) is compression state.

2. The integrated pressure and temperature control device according to claim 1, wherein: The temperature reducing pressure reducing cavity (3) is provided with a main opening (31) corresponding to the temperature reducing water inlet (11), and a plurality of auxiliary openings (32) are arranged on one side of the main opening (31).

3. The integrated pressure and temperature control device according to claim 1, wherein: The temperature reducing pressure reducing cavity (3) is provided with a main opening (31) corresponding to the temperature reducing water inlet (11), and a plurality of auxiliary openings (32) are arranged on one side of the main opening (31).

4. The integrated pressure and temperature control device according to claim 3, wherein: The temperature reducing pressure reducing cavity (3) is provided with a main opening (31) corresponding to the temperature reducing water inlet (11), and a plurality of auxiliary openings (32) are arranged on one side of the main opening (31).

5. The integrated pressure and temperature control device of claim 1, wherein: The temperature reducing pressure reducing cavity (3) is provided with a main opening (31) corresponding to the temperature reducing water inlet (11), and a plurality of auxiliary openings (32) are arranged on one side of the main opening (31).

6. The integrated pressure and temperature control device of claim 1, wherein: The temperature reducing pressure reducing cavity (3) is provided with a main opening (31) corresponding to the temperature reducing water inlet (11), and a plurality of auxiliary openings (32) are arranged on one side of the main opening (31).

7. A method of operating a pressure controlled integrated pressure and temperature reduction device according to any one of claims 1 to 6, characterized in that: It comprises the following steps: Step 1: steam enters the inside of flow main pipe (1), then enters temperature reducing pressure reducing cavity (3), under the action of steam pressure, temperature reducing pressure reducing cavity (3) will be subjected to thrust, at this time, the steam pressure is higher than the pressure value of pressure control spring (4), temperature reducing pressure reducing cavity (3) and flow main pipe (1) are matched through outer sealing surface (33) and inner sealing surface (13), so that the device is in a sealed state; Step 2: at the same time, temperature reducing water enters temperature reducing pressure reducing cavity (3) through temperature reducing water inlet (11), main opening (31) and auxiliary opening (32), temperature reducing water and steam are mixed, and steam is fully mixed in temperature reducing pressure reducing cavity (3) for temperature reduction and pressure reduction; Step 3: with the progress of temperature reduction and pressure reduction process, the steam pressure gradually decreases, when the pressure decreases to the preset pressure value of pressure control spring (4), the compression force of pressure control spring (4) is greater than the steam pressure, temperature reducing pressure reducing cavity (3) is opened, at this time, the steam reaching the preset pressure flows out through the multiple flow channels (34) at the end of temperature reducing pressure reducing cavity (3).

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