Liquefied gas outlet temperature and pressure adjusting assembly

Abstract

The utility model relates to the technical field of liquefied gas outlet temperature and pressure stable control, in particular to a liquefied gas outlet temperature and pressure adjusting assembly which comprises a first communicating pipe and a compressor body. One end of the first communicating pipe is provided with a liquefaction pump body in a communicating mode, the end, away from the first communicating pipe, of the liquefaction pump body is provided with a second communicating pipe in a communicating mode, and the upper end face of the second communicating pipe is fixedly provided with a temperature sensor body; the PLC control system is electrically connected with the temperature sensor body; wherein the temperature sensor body is electrically connected with the liquefaction pump body through the PLC control system; the DCS control system is electrically connected with the pressure sensor body; wherein the pressure sensor body is electrically connected with the compressor body through the DCS control system. According to the utility model, the problems of low yield and high energy consumption of the liquefying device caused by large fluctuation of the working condition of the device system are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquefied gas outlet temperature and pressure stability control, in particular to a liquefied gas outlet temperature and pressure regulating component. Background Art

[0002] The working principle of the liquefaction device is to use the circulating nitrogen to increase the pressure and expand the refrigeration capacity after pre-cooling, so that the nitrogen is cooled, liquefied, and supercooled under a certain pressure to become liquid nitrogen. The liquid nitrogen is throttled and sent to the cryogenic liquid storage tank.

[0003] However, at the current stage, when the liquefaction plant products are converted, the operating conditions of the plant system fluctuate greatly, which leads to low output and high energy consumption of the liquefaction plant. Therefore, a liquefied gas outlet temperature and pressure regulating component is needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a liquefied gas outlet temperature and pressure regulating component, which has the advantages of regulating the outlet pressure of the matching circulating nitrogen compressor and analyzing the dew point through the drainage of the gas side of the final stage cooler, thereby solving the problem that the operating conditions of the device system fluctuate greatly, thereby causing low output and high energy consumption of the liquefaction device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquefied gas outlet temperature and pressure regulating assembly, comprising a first connecting pipe and a compressor body, a pressure sensor body is fixedly installed on the upper end surface of the first connecting pipe, a liquefied pump body is connected and installed at one end of the first connecting pipe, a second connecting pipe is connected and installed at one end of the liquefied pump body away from the first connecting pipe, a temperature sensor body is fixedly installed on the upper end surface of the second connecting pipe, and further comprising a PLC control system and a DCS control system;

[0006] The PLC control system is electrically connected to the temperature sensor body;

[0007] Among them, the temperature sensor body is electrically connected to the liquefaction pump body through the PLC control system;

[0008] The DCS control system is electrically connected to the pressure sensor body;

[0009] Among them, the pressure sensor body is electrically connected to the compressor body through the DCS control system.

[0010] When using a liquefied gas outlet temperature and pressure regulating component in the technical solution, the pressure in the first installation pipe is measured by the pressure sensor body. The actual pressure of the first installation pipe is converted into an analog signal and transmitted to the DCS control system through the network. The DCS control system outputs the analog quantity to the compressor body. If the pressure of the first installation pipe is detected to be too low, the DCS control system will control the operation of the compressor body by outputting an analog quantity signal according to the preset logical judgment. This analog quantity signal will adjust the guide vane opening of the compressor body, thereby changing the gas volume of the compressor body. By adjusting the guide vane opening and gas volume of the compressor body, the DCS control system can indirectly adjust the pressure at the outlet of the compressor body. This is an automatic adjustment mechanism designed to maintain a stable pressure of the first installation pipe; by installing the temperature sensor body at the outlet of the liquefied pump body, connecting the PLC control system to the liquefied pump body, and installing the temperature sensor body at the second connecting pipe, the temperature sensor body is electrically connected to the PLC control system, and the initial PID parameters are set for the control algorithm. The system monitors the reading of the temperature sensor in real time, and calculates the corresponding control action through the control algorithm. The PLC control system adjusts the working state of the liquefied pump body according to the control action, thereby realizing the adjustment of the outlet temperature.

[0011] Preferably, the end of the first connecting pipe away from the liquefaction pump body is connected and installed with the compressor body, the upper end surface of the first connecting pipe is opened and connected with a first mounting pipe, and the pressure sensor body is fixedly installed on the upper end surface of the first connecting pipe through the first mounting pipe.

[0012] By connecting and installing the end of the first connecting tube away from the liquefaction pump body with the compressor body, and opening a hole on the upper end surface of the first connecting tube and connecting and installing a first mounting tube, the pressure sensor body is fixedly installed on the upper end surface of the first connecting tube through the first mounting tube, and the pressure in the first connecting tube can be monitored through the pressure sensor body.

[0013] Preferably, the pressure sensor body adopts a pressure transmitter structure design, the pressure sensor body converts the actual pressure in the first connecting pipe into an analog signal and transmits it to a DCS control system through a network, and the DCS control system outputs the analog quantity to the compressor body.

[0014] By adopting a pressure transmitter structure design for the pressure sensor body, during operation, the pressure sensor body converts the actual pressure in the first connecting pipe into an analog signal and transmits it to the DCS control system through the network, and outputs the analog signal to the compressor body through the DCS control system, thereby controlling the compressor body.

[0015] Preferably, a hole is opened on the upper end surface of the second connecting tube and a second mounting tube is installed in communication therewith, and the temperature sensor body is fixedly mounted on the upper end surface of the second connecting tube through the second mounting tube.

[0016] A second installation pipe is installed by opening a hole on the upper end surface of the second connecting pipe and connecting it, and the temperature sensor body is fixedly installed on the upper end surface of the second connecting pipe through the second installation pipe, so that the temperature in the second connecting pipe can be monitored by the temperature sensor body.

[0017] Preferably, the temperature sensor body converts the actual temperature in the second connecting pipe into an analog signal and transmits it to the PLC control system through the network, and the PLC control system outputs the analog value to the liquefaction pump body.

[0018] The actual temperature in the second connecting pipe is converted into an analog signal through the temperature sensor body and transmitted to the PLC control system through the network, and the analog signal is output to the liquefaction pump body through the PLC control system, thereby controlling the liquefaction pump body.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0020] The utility model sets a PLC control system and a DCS control system, and electrically connects the PLC control system with the temperature sensor body. At the same time, the temperature sensor body is electrically connected to the liquefied pump body through the PLC control system, and the DCS control system is electrically connected to the pressure sensor body. At the same time, the pressure sensor body is electrically connected to the compressor body through the DCS control system. During specific operation, the pressure in the first installation pipe is measured by the pressure sensor body. The actual pressure of the first installation pipe is converted into an analog signal and transmitted to the DCS control system through the network. The DCS control system outputs an analog quantity to the compressor body. If it is detected that the pressure of the first installation pipe is too low, the DCS control system will control the operation of the compressor body by outputting an analog quantity signal according to the preset logic judgment. This analog quantity signal will adjust the guide vane opening of the compressor body, thereby changing the gas volume of the compressor body. By adjusting the guide vane opening and gas volume of the compressor body, the DCS control system can indirectly adjust the pressure at the outlet of the compressor body. This is an automatic adjustment mechanism designed to maintain a stable pressure in the first installation pipe; by installing the temperature sensor body at the outlet of the liquefied pump body, connecting the PLC control system to the liquefied pump body, and installing the temperature sensor body at the second connecting pipe, the temperature sensor body is electrically connected to the PLC control system, and the initial PID parameters are set for the control algorithm. The system monitors the reading of the temperature sensor in real time, and calculates the corresponding control action through the control algorithm. The PLC control system adjusts the working state of the liquefied pump body according to the control action, thereby achieving the effect of adjusting the outlet pressure of the supporting circulating nitrogen compressor and analyzing the dew point through the gas side drainage of the final stage cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the main structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the process flow of the utility model.

[0023] In the figure: 1. first connecting pipe; 2. first mounting pipe; 3. pressure sensor body; 4. liquefaction pump body; 5. second connecting pipe; 6. second mounting pipe; 7. temperature sensor body; 8. PLC control system; 9. DCS control system; 10. compressor body. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example

[0026] like Figure 1 and Figure 2 As shown, the utility model provides an embodiment: a liquefied gas outlet temperature and pressure regulating assembly, including a first connecting pipe 1 and a compressor body 10, a pressure sensor body 3 is fixedly installed on the upper end surface of the first connecting pipe 1, a liquefied pump body 4 is connected and installed at one end of the first connecting pipe 1, a second connecting pipe 5 is connected and installed at one end of the liquefied pump body 4 away from the first connecting pipe 1, a temperature sensor body 7 is fixedly installed on the upper end surface of the second connecting pipe 5, and also includes a PLC control system 8 and a DCS control system 9;

[0027] Specifically,

[0028] The PLC control system 8 is electrically connected to the temperature sensor body 7;

[0029] The temperature sensor body 7 is electrically connected to the liquefied pump body 4 through the PLC control system 8.

[0030] The DCS control system 9 is electrically connected to the pressure sensor body 3;

[0031] Among them, the pressure sensor body 3 is electrically connected to the compressor body 10 through the DCS control system 9. By setting the PLC control system 8 and the DCS control system 9, and electrically connecting the PLC control system 8 to the temperature sensor body 7, at the same time, the temperature sensor body 7 is electrically connected to the liquefied pump body 4 through the PLC control system 8, and the DCS control system 9 is electrically connected to the pressure sensor body 3, and at the same time, the pressure sensor body 3 is electrically connected to the compressor body 10 through the DCS control system 9. During specific operation, the pressure in the first installation pipe 2 is measured by the pressure sensor body 3. The actual pressure of the first installation pipe 2 is converted into an analog signal and transmitted to the DCS control system 9 through the network. The DCS control system 9 outputs an analog quantity to the compressor body 10. If it is detected that the pressure of the first installation pipe 2 is too low, the DCS control system 9 will control the operation of the compressor body 10 by outputting an analog quantity signal according to the preset logic judgment. This analog quantity signal will adjust the guide vane opening of the compressor body 10, thereby changing the gas volume of the compressor body 10. By adjusting the guide vane opening and gas volume of the compressor body 10, the DCS control system 9 can indirectly adjust the pressure at the outlet of the compressor body 10. This is an automatic adjustment mechanism, which aims to maintain a stable pressure in the first installation pipe 2; by installing the temperature sensor body 7 at the outlet of the liquefied pump body 4, connecting the PLC control system 8 to the liquefied pump body 4, and installing the temperature sensor body 7 at the second connecting pipe 5, the temperature sensor body 7 is electrically connected to the PLC control system 8, and the initial PID parameters are set for the control algorithm. The system monitors the reading of the temperature sensor in real time, and calculates the corresponding control action through the control algorithm. The PLC control system 8 adjusts the working state of the liquefied pump body 4 according to the control action, thereby achieving the effect of adjusting the outlet pressure of the supporting circulating nitrogen compressor and analyzing the dew point through the gas side drainage of the final stage cooler.

[0032] Furthermore, one end of the first connecting pipe 1 away from the liquefaction pump body 4 is connected and installed with the compressor body 10 , the upper end surface of the first connecting pipe 1 is opened and connected with a first mounting pipe 2 , and the pressure sensor body 3 is fixedly installed on the upper end surface of the first connecting pipe 1 through the first mounting pipe 2 .

[0033] By connecting and installing the end of the first connecting tube 1 away from the liquefaction pump body 4 with the compressor body 10, and opening a hole on the upper end surface of the first connecting tube 1 and connecting and installing the first mounting tube 2, the pressure sensor body 3 is fixedly installed on the upper end surface of the first connecting tube 1 through the first mounting tube 2, and the pressure in the first connecting tube 1 can be monitored through the pressure sensor body 3.

[0034] Furthermore, the pressure sensor body 3 adopts a pressure transmitter structure design. The pressure sensor body 3 converts the actual pressure in the first connecting pipe 1 into an analog signal and transmits it to the DCS control system 9 through the network. The DCS control system 9 outputs the analog quantity to the compressor body 10.

[0035] By adopting a pressure transmitter structure design for the pressure sensor body 3, during operation, the pressure sensor body 3 converts the actual pressure in the first connecting pipe 1 into an analog signal and transmits it to the DCS control system 9 through the network, and outputs the analog quantity to the compressor body 10 through the DCS control system 9, thereby controlling the compressor body 10.

[0036] Furthermore, a hole is opened on the upper end surface of the second connecting tube 5 and a second mounting tube 6 is installed in communication therewith. The temperature sensor body 7 is fixedly installed on the upper end surface of the second connecting tube 5 through the second mounting tube 6 .

[0037] A hole is opened on the upper end surface of the second connecting tube 5 and connected with the second mounting tube 6 , and the temperature sensor body 7 is fixedly mounted on the upper end surface of the second connecting tube 5 through the second mounting tube 6 , so that the temperature in the second connecting tube 5 can be monitored by the temperature sensor body 7 .

[0038] Furthermore, the temperature sensor body 7 converts the actual temperature in the second connecting pipe 5 into an analog signal and transmits it to the PLC control system 8 through the network, and the PLC control system 8 outputs the analog quantity to the liquefaction pump body 4 .

[0039] The actual temperature in the second connecting pipe 5 is converted into an analog signal by the temperature sensor body 7 and transmitted to the PLC control system 8 through the network, and the analog signal is output to the liquefaction pump body 4 by the PLC control system 8, so as to control the liquefaction pump body 4.

[0040] When the utility model is used, the pressure in the first installation pipe 2 is measured by the pressure sensor body 3. The actual pressure of the first installation pipe 2 is converted into an analog signal and transmitted to the DCS control system 9 through the network. The DCS control system 9 outputs the analog quantity to the compressor body 10. If it is detected that the pressure of the first installation pipe 2 is too low, the DCS control system 9 will control the operation of the compressor body 10 by outputting an analog quantity signal according to the preset logical judgment. This analog quantity signal will adjust the guide vane opening of the compressor body 10, thereby changing the gas volume of the compressor body 10. By adjusting the guide vane opening and gas volume of the compressor body 10, the DCS control system 9 can indirectly adjust the pressure at the outlet of the compressor body 10. This is an automatic adjustment mechanism, which is intended to maintain a stable pressure in the first installation pipe 2; by installing the temperature sensor body 7 at the outlet of the liquefied pump body 4, connecting the PLC control system 8 to the liquefied pump body 4, and installing the temperature sensor body 7 at the second connecting pipe 5, the temperature sensor body 7 is electrically connected to the PLC control system 8, and the initial PID parameters are set for the control algorithm. The system monitors the reading of the temperature sensor in real time and calculates the corresponding control action through the control algorithm. The PLC control system 8 adjusts the working state of the liquefaction pump body 4 according to the control action, thereby realizing the regulation of the outlet temperature.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A liquefied gas outlet temperature and pressure regulating assembly, comprising a first connecting pipe (1) and a compressor body (10), wherein a pressure sensor body (3) is fixedly mounted on the upper end surface of the first connecting pipe (1), a liquefied pump body (4) is connected and mounted on one end of the first connecting pipe (1), a second connecting pipe (5) is connected and mounted on the end of the liquefied pump body (4) away from the first connecting pipe (1), and a temperature sensor body (7) is fixedly mounted on the upper end surface of the second connecting pipe (5), characterized in that: Also includes: A PLC control system (8) is electrically connected to the temperature sensor body (7); The temperature sensor body (7) is electrically connected to the liquefaction pump body (4) through a PLC control system (8). A DCS control system (9) is electrically connected to the pressure sensor body (3); The pressure sensor body (3) is electrically connected to the compressor body (10) via a DCS control system (9).

2. A liquefied gas outlet temperature and pressure regulating assembly according to claim 1, characterized in that: The end of the first connecting tube (1) facing away from the liquefaction pump body (4) is connected and installed with the compressor body (10); a hole is opened on the upper end surface of the first connecting tube (1) and connected and installed with a first installation tube (2); the pressure sensor body (3) is fixedly installed on the upper end surface of the first connecting tube (1) through the first installation tube (2).

3. A liquefied gas outlet temperature and pressure regulating assembly according to claim 1, characterized in that: The pressure sensor body (3) adopts a pressure transmitter structure design. The pressure sensor body (3) converts the actual pressure in the first connecting pipe (1) into an analog signal and transmits it to the DCS control system (9) through the network. The DCS control system (9) outputs the analog quantity to the compressor body (10).

4. A liquefied gas outlet temperature and pressure regulating assembly according to claim 1, characterized in that: The upper end surface of the second connecting tube (5) is opened and connected to a second mounting tube (6) installed therein, and the temperature sensor body (7) is fixedly mounted on the upper end surface of the second connecting tube (5) via the second mounting tube (6).

5. The liquefied gas outlet temperature and pressure regulating assembly according to claim 1, characterized in that: The temperature sensor body (7) converts the actual temperature in the second connecting pipe (5) into an analog signal and transmits it to the PLC control system (8) through the network. The PLC control system (8) outputs the analog quantity to the liquefaction pump body (4).

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