Equipment, device and adding method for adding biphenyl without stopping production by negative pressure suction

Abstract

The present invention relates to an apparatus, device and addition method for negative pressure suction and continuous production addition of biphenyl in a biphenyl boiler. One end of the biphenyl liquid inlet pipe is used to communicate with a biphenyl barrel, and the other end of the biphenyl liquid inlet pipe communicates with a biphenyl tank; one end of the first biphenyl vapor inlet pipe communicates with the biphenyl tank, and the other end of the first biphenyl vapor inlet pipe is used to communicate with the biphenyl vapor outlet pipe of the biphenyl boiler; one end of the biphenyl liquid outlet pipe assembly communicates with the liquid outlet of the biphenyl tank, and the other end of the biphenyl liquid outlet pipe assembly is used to communicate with the liquid discharge port of the biphenyl boiler; the biphenyl tank is used to condense the biphenyl vapor generated by the biphenyl boiler to generate negative pressure and then suck the biphenyl liquid in the biphenyl barrel through the biphenyl liquid inlet pipe. During use, there is no need to stop production, avoiding a reduction in output. In addition, the investment in construction funds can be reduced, and there is no need to use a vacuum pump to generate negative pressure in the biphenyl tank during this process, avoiding environmental pollution.

Description

Technical Field

[0001] This application relates to the field of spinning equipment, and particularly to equipment, devices and addition methods for negative pressure suction and adding biphenyl without stopping production. Background Art

[0002] Biphenyl boilers mainly use biphenyl liquid as a medium for heating, and supply the generated biphenyl steam to each equipment heating point. Biphenyl, full name biphenyl mixture, refers to a eutectic mixture of 73.5% diphenyl ether and 26.5% biphenyl. Usually, biphenyl is heated to above 258°C to vaporize to form biphenyl steam, and then this biphenyl steam is used for heating.

[0003] During the normal production of a biphenyl boiler, when the biphenyl liquid level in the biphenyl boiler decreases, it is necessary to add biphenyl liquid, and at the same time, it is necessary to ensure that the production line does not stop. The common methods for adding biphenyl liquid to a biphenyl boiler are as follows:

[0004] 1. It is necessary to stop the production line, cut off the power supply of the biphenyl boiler to cool down. When the biphenyl liquid in the biphenyl boiler drops to near room temperature and the pressure in the inner cavity of the biphenyl boiler approaches -0.095 MPa, use negative pressure to suck the biphenyl liquid into the biphenyl boiler through the interface of the electrical contact vacuum pressure gauge. However, the power-off cooling time of the biphenyl boiler is very long (more than 10 hours), and it is necessary to stop production, resulting in a large loss;

[0005] 2. The production line does not stop. Use a gear pump to pump biphenyl from a biphenyl storage tank ranging from several cubic meters to dozens of cubic meters into the biphenyl boiler. However, it is necessary to invest a lot of money to build a biphenyl transportation and recovery system, with a high economic cost;

[0006] 3. Directly use a vacuum pump to generate negative pressure to suck the biphenyl liquid into the biphenyl boiler. However, when the vacuum pump is connected to the biphenyl boiler, the vacuum pump will discharge air mixed with biphenyl gas, polluting the environment. Summary of the Invention

[0007] In view of the above problems, this application provides equipment, devices and addition methods for negative pressure suction and adding biphenyl without stopping production to solve the above technical problems.

[0008] To achieve the above object, the inventor provides an equipment for negative pressure suction of biphenyl boiler and adding biphenyl without stopping production, including a biphenyl tank, a biphenyl liquid inlet pipe, a first biphenyl steam inlet pipe and a biphenyl liquid outlet pipe assembly; one end of the biphenyl liquid inlet pipe is used to communicate with a biphenyl barrel, and the other end of the biphenyl liquid inlet pipe communicates with the biphenyl tank; one end of the first biphenyl steam inlet pipe communicates with the biphenyl tank, and the other end of the first biphenyl steam inlet pipe is used to communicate with the biphenyl steam outlet pipe of the biphenyl boiler. The first biphenyl steam inlet pipe is used to transport the biphenyl steam generated by the biphenyl boiler to the biphenyl tank; one end of the biphenyl liquid outlet pipe assembly communicates with the liquid outlet of the biphenyl tank, and the other end of the biphenyl liquid outlet pipe assembly is used to communicate with the liquid discharge port of the biphenyl boiler. The biphenyl liquid outlet pipe assembly is used to transport the biphenyl liquid in the biphenyl tank to the biphenyl boiler; wherein, the biphenyl tank is used to condense the biphenyl steam generated by the biphenyl boiler to generate negative pressure and then suck the biphenyl liquid in the biphenyl barrel through the biphenyl liquid inlet pipe.

[0009] In the embodiment, a first biphenyl steam inlet valve is arranged on the first biphenyl steam inlet pipe, and the first biphenyl steam inlet valve is used to control the flow rate of the biphenyl steam in the first biphenyl steam inlet pipe by adjusting the opening degree.

[0010] In the embodiment, a first biphenyl liquid inlet valve is arranged on the biphenyl liquid inlet pipe, and the first biphenyl liquid inlet valve is used to control the flow rate of the biphenyl liquid in the biphenyl liquid inlet pipe by adjusting the opening degree.

[0011] In the embodiment, an observation part is arranged on the biphenyl liquid inlet pipe, and the observation part is used to observe the condition of the biphenyl liquid in the biphenyl barrel being sucked by the biphenyl tank.

[0012] In the embodiment, the biphenyl liquid outlet pipe assembly includes a biphenyl liquid outlet pipe and a biphenyl liquid connection pipe; the biphenyl liquid outlet pipe communicates with the biphenyl tank, the biphenyl liquid outlet pipe communicates with the biphenyl liquid connection pipe, and the biphenyl liquid connection pipe communicates with the biphenyl boiler.

[0013] In the embodiment, a first biphenyl liquid outlet valve is arranged on the biphenyl liquid outlet pipe, and the first biphenyl liquid outlet valve is used to control a small amount of the biphenyl liquid in the biphenyl tank to enter the biphenyl boiler by adjusting the opening degree.

[0014] In the embodiment, a second biphenyl liquid outlet valve is further arranged on the biphenyl liquid outlet pipe, and the second biphenyl liquid outlet valve is used to control a trace amount of the biphenyl liquid in the biphenyl tank to enter the biphenyl boiler by adjusting the opening degree.

[0015] Different from the prior art, the above technical solution avoids production stoppage and output reduction by setting up equipment for negative pressure suction of diphenyl boilers and adding diphenyl without production stoppage. Moreover, compared with the existing diphenyl system, only by adding a first diphenyl steam inlet pipe between the diphenyl tank and the diphenyl boiler can a negative pressure be generated in the diphenyl tank, thus reducing the investment in construction funds. In addition, the negative pressure in the diphenyl tank is generated by utilizing the principle that the pressure decreases after the diphenyl steam condenses. Therefore, there is no need to use a vacuum pump to generate a negative pressure in the diphenyl tank during this process, avoiding environmental pollution.

[0016] To achieve the above object, the inventor also provides a diphenyl boiler device, including: the equipment for negative pressure suction of diphenyl boilers and adding diphenyl without production stoppage as described in any one of the above provided by the inventor, a diphenyl barrel, and a diphenyl boiler; diphenyl liquid is contained in the diphenyl barrel, and the diphenyl barrel is connected to the diphenyl liquid inlet pipe; the diphenyl boiler includes a diphenyl steam outlet pipe and a diphenyl liquid discharge pipe, the diphenyl steam outlet pipe is connected to the first diphenyl steam inlet pipe, and the diphenyl liquid discharge pipe is connected to the diphenyl liquid outlet pipe assembly.

[0017] Different from the prior art, the above technical solution avoids production stoppage and output reduction by setting up equipment for negative pressure suction of diphenyl boilers and adding diphenyl without production stoppage. Moreover, compared with the existing diphenyl system, only by adding a first diphenyl steam inlet pipe between the diphenyl tank and the diphenyl boiler can a negative pressure be generated in the diphenyl tank, thus reducing the investment in construction funds. In addition, the negative pressure in the diphenyl tank is generated by utilizing the principle that the pressure decreases after the diphenyl steam condenses. Therefore, there is no need to use a vacuum pump to generate a negative pressure in the diphenyl tank during this process, avoiding environmental pollution.

[0018] To achieve the above object, the inventor also provides a method for adding diphenyl to a diphenyl boiler, which utilizes the negative pressure formed after the diphenyl steam in the diphenyl boiler cools in the diphenyl tank to suck the diphenyl liquid in the diphenyl barrel into the diphenyl tank; the method for adding diphenyl to a diphenyl boiler includes the following steps:

[0019] Open the first diphenyl steam inlet valve, and the diphenyl steam generated by the diphenyl boiler enters the diphenyl tank;

[0020] Observe the first pressure indication value of the first pressure gauge. When the first pressure indication value is the same as the second pressure indication value of the second pressure gauge, close the first diphenyl steam inlet valve;

[0021] The diphenyl steam in the diphenyl tank naturally cools into diphenyl liquid. When the first pressure indication value is close to -0.095 MPa, fully open the first diphenyl liquid inlet valve. At this time, it can be seen through the observation part that the diphenyl liquid in the diphenyl barrel is sucked into the diphenyl tank.

[0022] In an embodiment, after the biphenyl liquid is pumped into the biphenyl tank and it is determined that the liquid in the biphenyl tank is sufficient based on the first liquid level indication value of the first liquid level gauge, the method for adding to the biphenyl boiler further includes the following steps:

[0023] Slowly open the first biphenyl steam inlet valve, and the biphenyl steam generated by the biphenyl boiler enters the biphenyl tank;

[0024] Observe the first pressure indication value of the first pressure gauge. When the first pressure indication value is the same as the second pressure indication value of the second pressure gauge, open the first biphenyl liquid outlet valve to an opening degree of 1 / 3 to 1 / 2;

[0025] Slowly open the second biphenyl liquid outlet valve and observe the first liquid level indication value of the liquid level gauge of the biphenyl tank until the first liquid level indication value slowly decreases and then stop opening the second biphenyl liquid outlet valve. At this time, a small amount of the biphenyl liquid in the biphenyl tank enters the biphenyl boiler;

[0026] Reduce the opening degree of the second biphenyl liquid outlet valve by 1 / 3 to 1 / 2. At this time, a trace amount of the biphenyl liquid in the biphenyl tank enters the biphenyl boiler;

[0027] Observe the second liquid level indication value of the second liquid level gauge until the second liquid level indication value reaches the process requirements, and then close the second biphenyl liquid outlet valve.

[0028] Different from the prior art, the above technical solution sets up equipment for negative pressure suction and continuous production addition of biphenyl to the biphenyl boiler, which does not require shutdown during use, avoiding a reduction in output. Moreover, compared with the existing biphenyl system, only adding a first biphenyl steam inlet pipeline between the biphenyl tank and the biphenyl boiler can create a negative pressure in the biphenyl tank, thus reducing the investment in construction funds. In addition, creating a negative pressure in the biphenyl tank utilizes the principle that the pressure decreases after the biphenyl steam condenses. Therefore, there is no need to use a vacuum pump to create a negative pressure in the biphenyl tank, avoiding environmental pollution.

[0029] The above relevant description of the invention content is only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and then be able to implement it according to the content recorded in the description and the drawings, and in order to make the above objects, other objects, features, and advantages of this application more easily understood, the following is described in conjunction with the specific implementation manners and drawings of this application. Description of the Drawings

[0030] The drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the specific implementation manners of the present invention and other related contents, and should not be considered as a limitation to this application.

[0031] In the drawings of the description:

[0032] Figure 1 Schematic structural diagram of the equipment for adding biphenyl under negative pressure suction without shutting down the biphenyl boiler described in the specific implementation mode;

[0033] Figure 2 Schematic structural diagram of the biphenyl boiler device described in the specific implementation mode;

[0034] Figure 3 Schematic structural diagram of the biphenyl tank described in the specific implementation mode;

[0035] Figure 4 Schematic structural diagram of the biphenyl boiler described in the specific implementation mode;

[0036] Figure 5 Schematic structural diagram of the cooperation between the equipment for adding biphenyl under negative pressure suction without shutting down the biphenyl boiler and the biphenyl boiler except for the biphenyl liquid inlet pipeline described in the specific implementation mode;

[0037] The descriptions of the reference numerals involved in the above-mentioned drawings are as follows:

[0038] 1. Biphenyl barrel;

[0039] 2. Biphenyl tank;

[0040] 21. First liquid level gauge;

[0041] 211. First stop valve;

[0042] 212. Second stop valve;

[0043] 22. First pressure gauge;

[0044] 221. Pressure gauge pipe fitting;

[0045] 2211. Pressure gauge stop valve;

[0046] 222. Pressure gauge elbow;

[0047] 23. Multifunctional pipe fitting;

[0048] 231. Multifunctional valve;

[0049] 3. Biphenyl boiler;

[0050] 31. Second liquid level gauge;

[0051] 32. Third liquid level gauge;

[0052] 33. Biphenyl steam outlet pipe;

[0053] 34. Second biphenyl steam inlet pipe;

[0054] 341. Second biphenyl steam inlet valve;

[0055] 35. Biphenyl liquid discharge pipeline;

[0056] 351. First biphenyl liquid discharge valve;

[0057] 36. Second pressure gauge;

[0058] 4. Biphenyl liquid inlet pipeline;

[0059] 41. First biphenyl liquid inlet valve;

[0060] 42. Second biphenyl liquid inlet valve;

[0061] 43. Observation part;

[0062] 5. First biphenyl vapor inlet pipeline;

[0063] 51. First biphenyl vapor inlet valve;

[0064] 6. Biphenyl liquid outlet pipeline assembly;

[0065] 61. Biphenyl liquid outlet pipeline;

[0066] 611. First biphenyl liquid outlet valve;

[0067] 612. Second biphenyl liquid outlet valve;

[0068] 62. Biphenyl liquid connecting pipeline;

[0069] 621. Second biphenyl liquid discharge valve;

[0070] 7. Equipment for negative pressure suction and continuous addition of biphenyl to a biphenyl boiler. Detailed implementation mode

[0071] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable objectives and effects of this application, the following is a detailed description in combination with the specific examples listed and accompanied by drawings. The examples described in this article are only used to more clearly illustrate the technical solutions of this application, so they are only examples and cannot be used to limit the protection scope of this application.

[0072] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of this application. The term "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it particularly limited to the independence or relevance between other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0073] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.

[0074] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0075] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary or sequential relationship between these entities or operations.

[0076] Without further limitation, in this application, the open-ended expressions such as "comprising", "including", "having" or other similar ones used in the statement are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be other elements in the process, method or product including the said elements, so that the process, method or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to this process, method or product.

[0077] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding" are understood not to include the number itself; expressions such as "above", "below", "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "multiple" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in the same way, unless otherwise specifically defined.

[0078] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiments of this application or facilitating the reader's understanding, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it cannot be understood as a limitation to the embodiments of this application.

[0079] Unless otherwise clearly specified or defined, in the description of the embodiments of the present application, terms such as "installed", "connected", "linked", "fixed", "set" should be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integral setting; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium; it may be the communication inside two components or the interaction relationship between two components. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0080] Please refer to Figure 1 and Figure 2 , this embodiment relates to a device 7 for negative pressure suction and continuous addition of biphenyl to a biphenyl boiler, including a biphenyl tank 2, a biphenyl liquid inlet pipe 4, a first biphenyl steam inlet pipe 5, and a biphenyl liquid outlet pipe assembly 6; one end of the biphenyl liquid inlet pipe 4 is used to communicate with a biphenyl barrel 1, and the other end of the biphenyl liquid inlet pipe 4 communicates with the biphenyl tank 2; one end of the first biphenyl steam inlet pipe 5 communicates with the biphenyl tank 2, and the other end of the first biphenyl steam inlet pipe 5 is used to communicate with the biphenyl steam outlet pipe 33 of the biphenyl boiler 3; the first biphenyl steam inlet pipe 5 is used to transport the biphenyl steam generated by the biphenyl boiler 3 to the biphenyl tank 2; one end of the biphenyl liquid outlet pipe assembly 6 communicates with the liquid outlet of the biphenyl tank 2, and the other end of the biphenyl liquid outlet pipe assembly 6 is used to communicate with the liquid discharge port of the biphenyl boiler 3, and the biphenyl liquid outlet pipe assembly 6 is used to transport the biphenyl liquid in the biphenyl tank 2 to the biphenyl boiler 3; wherein, the biphenyl tank 2 is used to condense the biphenyl steam generated by the biphenyl boiler 3 to generate negative pressure and then suck the biphenyl liquid in the biphenyl barrel 1 through the biphenyl liquid inlet pipe 4.

[0081] As Figure 3 shown, the biphenyl tank 2 can also be made of metal. The biphenyl tank 2 includes two parts, namely the upper cylindrical part and the lower regular conical part, and the capacity of the biphenyl tank 2 is the volume of the regular conical part plus the volume of the cylindrical part. Among them, the biphenyl tank 2 communicates with the biphenyl barrel 1 through the biphenyl liquid inlet pipe 4, that is, the liquid inlet end of the biphenyl liquid inlet pipe 4 extends into the bottom of the biphenyl barrel 1 through an opening, and the liquid outlet end of the biphenyl liquid inlet pipe 4 communicates with the biphenyl tank 2.

[0082] In the embodiment, in order to display the pressure value inside the biphenyl tank 2, a first pressure gauge 22 is provided on the biphenyl tank 2. The first pressure gauge 22 can display the negative pressure value inside the biphenyl tank 2 or the positive pressure value of the biphenyl steam inside the biphenyl tank 2. As Figure 2As shown in the figure, the first pressure gauge 22 is a vacuum pressure gauge. The first pressure gauge 22 includes a pressure gauge pipe fitting 221, a pressure gauge stop valve 2211, and a pressure gauge elbow 222. One end of the pressure gauge pipe fitting 221 is connected to the diphenyl tank 2, and the other end of the pressure gauge pipe fitting 221 is connected to the pressure gauge stop valve 2211. The pressure gauge elbow 222 is connected to the pressure gauge stop valve 2211. The first pressure gauge 22 is used to display the first pressure indication value of the diphenyl tank 2. The pressure gauge stop valve 2211 is arranged on the upper part of the pressure gauge pipe fitting 221, and the pressure gauge stop valve 2211 is used to open or close the pressure gauge pipe fitting 221. Among them, the pressure gauge elbow 222 has the following functions: 1. Protect the internal transmission mechanism of the gauge from damage by the medium temperature and medium corrosion; 2. Reduce the vibration and impact, and also play a certain role in dissipating heat for the medium with a higher temperature, so as to protect the pressure gauge and reduce the influence of the pressure gauge temperature on the error.

[0083] In other embodiments, a multi-functional pipe fitting 23 is further arranged on the diphenyl tank 2. A multi-functional valve 231 is arranged on the multi-functional pipe fitting 23. The multi-functional valve 231 is used to connect an external vacuum pump to evacuate the diphenyl tank 2; or it can be used to introduce nitrogen to conduct a pressure test or purge on the diphenyl tank 2 (or the entire diphenyl system) after installation / repair; or it can be used as a vent valve when the diphenyl boiler 3 starts to heat up from room temperature (an external hose is led to the outside to discharge the air and light components in the entire diphenyl system).

[0084] In addition to being supplied to each equipment heating point when the diphenyl boiler 3 is heating, in a closed container, the diphenyl steam can also be naturally cooled into diphenyl liquid. While the diphenyl steam is transformed into diphenyl liquid, the pressure in the closed container will decrease. The inventor applies the above characteristics of the diphenyl steam to the diphenyl tank 2. The diphenyl steam enters the diphenyl tank 2 through the first diphenyl steam inlet pipe 5, and after cooling, the pressure in the diphenyl tank 2 decreases. When the pressure in the diphenyl tank 2 decreases to the first pressure indication value close to -0.095 MPa (-0.095 MPa indicates a state close to complete vacuum), the diphenyl liquid in the diphenyl barrel 1 is sucked into the diphenyl tank 2. After filling the diphenyl tank 2 with enough diphenyl liquid, the diphenyl liquid can be provided to the diphenyl boiler 3 through the diphenyl liquid outlet pipe assembly 6.

[0085] Different from the prior art, the above technical solution is provided with a device 7 for negative pressure suction of the diphenyl boiler and adding diphenyl without stopping production. When in use, there is no need to stop production, avoiding the reduction of output. Moreover, compared with the existing diphenyl system, only by adding a first diphenyl steam inlet pipe 5 between the diphenyl tank 2 and the diphenyl boiler 3 can the diphenyl tank 2 generate negative pressure, thus reducing the investment in construction funds. In addition, the negative pressure of the diphenyl tank 2 is generated by using the principle that the pressure decreases after the diphenyl steam condenses. Therefore, there is no need to use a vacuum pump to generate negative pressure for the diphenyl tank 2 during this process, avoiding environmental pollution.

[0086] According to some embodiments of the present application, optionally, as Figure 1 shown, a first diphenyl vapor inlet pipe 5 is provided with a first diphenyl vapor inlet valve 51, and the first diphenyl vapor inlet valve 51 is used to control the flow rate of diphenyl vapor in the first diphenyl vapor inlet pipe 5 by adjusting the opening degree.

[0087] The first diphenyl vapor inlet valve 51 can be a bellows globe valve. The first diphenyl vapor inlet valve 51 can adjust the opening degree (including fully open or fully closed). By controlling the opening degree of the first diphenyl vapor inlet valve 51, the flow rate of diphenyl vapor in the first diphenyl vapor inlet pipe 5 can be controlled, that is, the flow rate of diphenyl vapor entering the diphenyl tank 2 can be controlled.

[0088] After the diphenyl boiler 3 transports the generated diphenyl vapor to the diphenyl tank 2 in sufficient quantity, at this time, the diphenyl vapor in the diphenyl tank 2 is saturated. Therefore, it is not necessary to continue transporting diphenyl vapor into the diphenyl tank 2. In order to transport diphenyl vapor to the diphenyl tank 2 and cut off the diphenyl vapor after transportation to cool the diphenyl vapor in the diphenyl tank 2 to a liquid, a first diphenyl vapor inlet valve 51 is provided on the first diphenyl vapor inlet pipe 5.

[0089] According to some embodiments of the present application, optionally, as Figure 1 shown, a first diphenyl liquid inlet pipe 4 is provided with a first diphenyl liquid inlet valve 41, and the first diphenyl liquid inlet valve 41 is used to control the flow rate of diphenyl liquid in the first diphenyl liquid inlet pipe 4 by adjusting the opening degree.

[0090] The first diphenyl liquid inlet valve 41 can be a bellows globe valve. The first diphenyl liquid inlet valve 41 can adjust the opening degree (including fully open or fully closed). By controlling the opening degree of the first diphenyl liquid inlet valve 41, the flow rate of diphenyl liquid in the first diphenyl liquid inlet pipe 4 can be controlled, that is, the flow rate of diphenyl liquid entering the diphenyl tank 2 can be controlled. As a preferred embodiment, in order to prevent internal leakage when the first diphenyl liquid inlet valve 41 is closed and to better adjust the flow rate of diphenyl liquid in the first diphenyl liquid inlet pipe 4, a second diphenyl liquid inlet valve 42 is further provided on the first diphenyl liquid inlet pipe 4. The second diphenyl liquid inlet valve 42 can be used as a backup for the first diphenyl liquid inlet valve 41, and the second diphenyl liquid inlet valve 42 can also be a bellows globe valve.

[0091] When the diphenyl boiler 3 transports the generated diphenyl vapor to the diphenyl tank 2, it is necessary to keep the diphenyl tank 2 completely cut off from the diphenyl barrel 1. Therefore, a first diphenyl liquid inlet valve 41 is provided on the first diphenyl liquid inlet pipe 4 to cut off the first diphenyl liquid inlet pipe to prevent diphenyl vapor from overflowing. In addition, by providing a second diphenyl liquid inlet valve 42 as a backup to prevent internal leakage when the first diphenyl liquid inlet valve 41 is closed.

[0092] According to some embodiments of the present application, optionally, as Figure 1 shown, an observation portion 43 is provided on the biphenyl liquid inlet pipe 4, and the observation portion 43 is used to observe the condition of the biphenyl liquid in the biphenyl barrel 1 being sucked by the biphenyl tank 2.

[0093] The observation portion 43 may be an observation window provided on the liquid inlet pipe of the biphenyl tank 2 for observation, and the observation window is made of a transparent material. In some embodiments, the observation portion 43 may also directly be a transparent pipe. The liquid inlet pipe of the biphenyl tank 2 is provided with a transparent pipe at the end connected to the biphenyl barrel 1, and the liquid inlet end of the transparent pipe extends into the bottom of the biphenyl barrel 1 through an opening on the biphenyl barrel 1.

[0094] In some embodiments, as Figure 3 shown, in order to cooperate with the observation window, a first liquid level gauge 21 is further provided on the side of the biphenyl tank 2. The first liquid level gauge 21 is used to display the liquid level in the biphenyl tank 2, and the liquid level value displayed by the first liquid level gauge 21 is the first liquid level indication value. Among them, the first liquid level gauge 21 may be a magnetic flap liquid level gauge, including a liquid level gauge upper pipe and a liquid level gauge lower pipe. The liquid level gauge upper pipe is connected to the upper end of the biphenyl tank 2, and a first stop valve 211 is installed on the liquid level gauge upper pipe; the liquid level gauge lower pipe is connected to the lower end of the biphenyl tank 2, and a second stop valve 212 is installed on the liquid level gauge lower pipe; the first liquid level gauge 21 communicates with the inner cavity of the biphenyl tank 2 through the liquid level gauge upper pipe and the liquid level gauge lower pipe, and the conduction of the first liquid level gauge 21 and the inner cavity of the biphenyl tank 2 is controlled through the first stop valve 211 and the second stop valve 212 to control whether the first liquid level gauge 21 displays the liquid level.

[0095] When the first pressure indication value of the biphenyl tank 2 is close to -0.095 MPa, open the first biphenyl liquid inlet valve 41 and the second biphenyl liquid inlet valve 42, and the biphenyl liquid in the biphenyl barrel 1 will be sucked into the biphenyl tank 2. At this time, it is possible to observe through the observation portion 43 whether the liquid in the biphenyl barrel 1 is sucked and observe whether the first liquid level indication value changes after sucking for a period of time. When the first liquid level indication value changes and it is observed through the observation portion 43 that the biphenyl liquid flow rate becomes smaller or there is no flow, it means that the biphenyl liquid in the biphenyl barrel 1 has been sucked out, and a new biphenyl barrel 1 needs to be replaced in time.

[0096] By providing the observation portion 43, it is possible to well observe whether the biphenyl liquid in the biphenyl barrel 1 is sucked by the biphenyl tank 2 and whether there is still biphenyl liquid remaining in the biphenyl barrel 1. In addition, through the cooperation of the first liquid level gauge 21 and the observation portion 43, it is possible to better understand the sucking situation of the biphenyl tank 2.

[0097] According to some embodiments of the present application, optionally, as Figure 1 and Figure 2As shown, the diphenyl liquid outlet pipe assembly 6 includes a diphenyl liquid outlet pipe 61 and a diphenyl liquid connection pipe 62; the diphenyl liquid outlet pipe 61 is communicated with the diphenyl tank 2, the diphenyl liquid outlet pipe 61 is communicated with the diphenyl liquid connection pipe 62, and the diphenyl liquid connection pipe 62 is communicated with the diphenyl boiler 3.

[0098] The liquid inlet of the diphenyl liquid outlet pipe 61 is communicated with the liquid outlet of the diphenyl tank 2, the liquid outlet of the diphenyl liquid outlet pipe 61 is communicated with the diphenyl liquid connection pipe 62, and the diphenyl liquid connection pipe 62 is further communicated with the diphenyl boiler 3. The diphenyl liquid outlet pipe 61 is used to flow the diphenyl liquid in the diphenyl tank 2 into the diphenyl boiler 3 through the diphenyl liquid connection pipe 62 to provide diphenyl liquid for the diphenyl boiler 3. In addition to introducing the diphenyl liquid in the diphenyl tank 2 into the diphenyl boiler 3, the diphenyl liquid connection pipe 62 can also discharge the diphenyl liquid in the diphenyl boiler 3 before maintenance. In some embodiments, a second diphenyl liquid discharge valve 621 is further provided on the diphenyl liquid connection pipe 62 to control the function switching of the diphenyl liquid connection pipe 62. That is, when it is necessary to introduce the diphenyl liquid in the diphenyl tank 2 into the diphenyl boiler 3 through the diphenyl liquid connection pipe 62, it is necessary to ensure that the second diphenyl liquid discharge valve 621 is in the closed state; when it is necessary to discharge the diphenyl liquid in the diphenyl boiler 3 through the diphenyl liquid connection pipe 62, it is necessary to ensure that the second diphenyl liquid discharge valve 621 is in the open state.

[0099] By providing the diphenyl liquid outlet pipe 61 and the diphenyl liquid connection pipe 62 to communicate the diphenyl tank 2 with the diphenyl boiler 3, in addition, the diphenyl liquid connection pipe 62 can not only introduce the diphenyl liquid in the diphenyl tank 2 into the diphenyl boiler 3, but also discharge the diphenyl liquid in the diphenyl boiler 3 before maintenance.

[0100] According to some embodiments of the present application, optionally, as Figure 1 shown, a first diphenyl liquid outlet valve 611 is provided on the diphenyl liquid outlet pipe 61, and the first diphenyl liquid outlet valve 611 controls a small amount of diphenyl liquid in the diphenyl tank 2 to enter the diphenyl boiler 3 by adjusting the opening degree.

[0101] During the normal production of the biphenyl boiler, due to the decrease in the biphenyl liquid level in the biphenyl boiler, it is necessary to add biphenyl liquid. In this working condition, the amount of biphenyl liquid to be added is not much, ranging from dozens of liters to more than 100 liters at most (generally not exceeding one barrel), but it is required that the production line cannot stop production; and during the process of adding biphenyl liquid, the temperature of the biphenyl steam cannot have a temperature fluctuation exceeding the process requirements, and it is preferably controlled within a temperature fluctuation range of ±1°C. That is, on the premise that the biphenyl tank 2 already has enough biphenyl liquid, when adding biphenyl liquid to the biphenyl boiler 3, it is necessary to ensure that the temperature fluctuation of the biphenyl steam is within ±1°C. Therefore, it is necessary to be able to add biphenyl liquid to the biphenyl boiler 3 evenly and in small amounts, so as to ensure that the temperature fluctuation of the biphenyl steam does not exceed ±1°C.

[0102] The first biphenyl liquid outlet valve 611 can be a bellows globe valve. The first biphenyl liquid outlet valve 611 can adjust the opening degree (including fully open or fully closed). By controlling the opening degree of the first biphenyl liquid outlet valve 611, the flow rate of the biphenyl liquid in the biphenyl liquid outlet pipe 61 can be controlled. By opening the first biphenyl liquid outlet valve 611 to an opening degree of 1 / 3 to 1 / 2, a small amount of the biphenyl liquid in the biphenyl tank 2 is controlled to enter the biphenyl boiler 3.

[0103] By setting the first biphenyl liquid outlet valve 611, the biphenyl liquid in the biphenyl tank 2 enters the biphenyl boiler 3 as little as possible, avoiding excessive temperature fluctuation of the biphenyl steam.

[0104] According to some embodiments of the present application, optionally, as Figure 1 shown, a second biphenyl liquid outlet valve 612 is further provided on the biphenyl liquid outlet pipe 61. The second biphenyl liquid outlet valve 612 is used to control a trace amount of the biphenyl liquid in the biphenyl tank 2 to enter the biphenyl boiler 3 by adjusting the opening degree.

[0105] The second biphenyl liquid outlet valve 612 can be a bellows globe valve. The second biphenyl liquid outlet valve 612 can adjust the opening degree (including fully open or fully closed). By controlling the opening degree of the second biphenyl liquid outlet valve 612, the flow rate of the biphenyl liquid in the biphenyl liquid outlet pipe 61 can be controlled. By cooperating the second biphenyl liquid outlet valve 612 with the first biphenyl liquid outlet valve 611 and opening the second biphenyl liquid outlet valve 612 to an opening degree of 1 / 3 to 1 / 2, a minute flow rate of the biphenyl liquid is controlled to enter the biphenyl boiler 3 (the flow rate of the biphenyl liquid entering the biphenyl boiler per unit time is less than 0.5 liters / minute. As long as there is biphenyl liquid slowly entering the biphenyl boiler, it is okay - for the electric heating power of 30 to 90 kW or even larger of the biphenyl boiler, a trace amount of biphenyl liquid enters from its bottom, resulting in a very small temperature fluctuation of the biphenyl steam and not exceeding the temperature fluctuation range required by the process).

[0106] In some embodiments, as Figure 2As shown in the figure, a second liquid level gauge 31 and a third liquid level gauge 32 are also provided on the side of the biphenyl boiler 3, and their structures are the same as that of the first liquid level gauge 21. The second liquid level gauge 31 and the third liquid level gauge 32 can be magnetic flap liquid level gauges. The second liquid level gauge 31 and the third liquid level gauge 32 are used to display the liquid level in the biphenyl boiler 3. The liquid level value displayed by the second liquid level gauge 31 is the second liquid level indication value, and the value displayed by the third liquid level gauge 32 is the third liquid level indication value. The second liquid level gauge 31 and the third liquid level gauge 32 are backup for each other. After a small flow of biphenyl liquid enters the biphenyl boiler 3, observe the second liquid level indication value and the third liquid level indication value. If the second liquid level indication value and the third liquid level indication value reach the biphenyl liquid level required by the process, the first biphenyl liquid outlet valve 611 or the second biphenyl liquid outlet valve 612 can be closed.

[0107] By setting the second biphenyl liquid outlet valve 612, it is possible to prevent internal leakage when the first biphenyl liquid outlet valve 611 is closed and cooperate with the first biphenyl liquid outlet valve 611 to control the small flow of biphenyl liquid into the biphenyl boiler 3.

[0108] Please refer to Figure 2 , this embodiment also relates to a biphenyl boiler device, including a device 7 for negative pressure suction of the biphenyl boiler and adding biphenyl without stopping production, a biphenyl barrel 1, and a biphenyl boiler 3; the biphenyl barrel 1 contains biphenyl liquid, and the biphenyl barrel 1 is connected to the biphenyl liquid inlet pipe 4; the biphenyl boiler 3 includes a biphenyl steam outlet pipe 33 and a biphenyl liquid discharge pipe 35. The biphenyl steam outlet pipe 33 is connected to the first biphenyl steam inlet pipe 5, and the biphenyl liquid discharge pipe 35 is connected to the biphenyl liquid outlet pipe assembly 6.

[0109] The biphenyl barrel 1 can be a metal iron tank or an iron barrel, which is convenient for containing biphenyl liquid. The capacity of the biphenyl barrel 1 is the capacity of a general biphenyl barrel 1 and can be purchased externally. An opening is provided above the biphenyl barrel 1 for connecting with the pipes of other equipment to suck the biphenyl liquid in the biphenyl barrel 1.

[0110] As Figure 4As shown, the diphenyl boiler 3 has a general diphenyl boiler structure and is mainly used to heat diphenyl liquid to form diphenyl steam and supply it to each equipment heating point. In order to display the pressure value inside the diphenyl boiler 3, a second pressure gauge 36 is provided on the diphenyl boiler 3. The second pressure gauge 36 is an electric contact vacuum pressure gauge and can display the negative pressure value or positive pressure value inside the diphenyl boiler 3. The displayed pressure value is the second pressure indication value. Among them, the liquid outlet of the diphenyl tank 2 is connected to the lower end of the diphenyl boiler 3 through the diphenyl liquid outlet pipe assembly 6. The upper end of the diphenyl boiler 3 is connected to the diphenyl tank 2 through the first diphenyl steam inlet pipe 5, that is, the steam inlet of the first diphenyl steam inlet pipe 5 is connected to the diphenyl boiler 3, and the steam outlet of the first diphenyl steam inlet pipe 5 is connected to the diphenyl tank 2. In order to maintain the temperature of the diphenyl steam, the second diphenyl steam inlet pipe 34 is provided with heat preservation performance.

[0111] In some embodiments, the diphenyl steam outlet pipe 33 of the diphenyl boiler 3 is connected to the second diphenyl steam inlet pipe 34, and the second diphenyl steam inlet pipe 34 is connected to the first diphenyl steam inlet pipe 5; the first diphenyl steam inlet pipe 5 is detachably connected to the second diphenyl steam inlet valve 341; the diphenyl liquid discharge pipe 35 is connected to the diphenyl liquid connection pipe 62; the diphenyl liquid connection pipe 62 is detachably connected to the first diphenyl liquid discharge valve 351.

[0112] The diphenyl steam outlet pipe 33 is arranged above the diphenyl boiler 3. The steam inlet of the second diphenyl steam inlet pipe 34 is connected to the diphenyl steam outlet pipe 33, the steam outlet of the second diphenyl steam inlet pipe 34 is connected to the steam inlet of the first diphenyl steam inlet pipe 5, and the steam outlet of the first diphenyl steam inlet pipe 5 is connected to the diphenyl tank 2. In some embodiments, a second diphenyl steam inlet valve 341 is provided on the second diphenyl steam inlet pipe 34. The second diphenyl steam inlet valve 341 can be a bellows stop valve. The second diphenyl steam inlet valve 341 can adjust the opening degree (including fully open or fully closed). By controlling the opening degree of the second diphenyl steam inlet valve 341, the flow rate of diphenyl steam in the second diphenyl steam inlet pipe 34 can be controlled, that is, the flow rate of diphenyl steam entering the diphenyl tank 2 can be controlled. In addition, the second diphenyl steam inlet valve 341 and the first diphenyl steam inlet valve 51 are used in series to prevent internal leakage when the first diphenyl steam inlet valve 51 is closed and to prevent the flow rate from being too large when it is opened. As a preferred embodiment, as Figure 5 shown, the first diphenyl steam inlet pipe 5 is detachably connected to the second diphenyl steam inlet valve 341. Among them, the first diphenyl steam inlet pipe 5 is detachably connected to the second diphenyl steam inlet valve 341 through the cooperation of a flange and a bolt.

[0113] The biphenyl liquid discharge pipe 35 is arranged below the biphenyl boiler 3. The biphenyl liquid discharge pipe 35 is communicated with the biphenyl liquid connection pipe 62 and is used for introducing or discharging the biphenyl liquid. In some embodiments, a first biphenyl liquid discharge valve 351 is arranged on the biphenyl liquid discharge pipe 35. The first biphenyl liquid discharge valve 351 can be a bellows globe valve. The first biphenyl liquid discharge valve 351 can adjust the opening degree (including fully open or fully closed). By controlling the opening degree of the first biphenyl liquid discharge valve 351, the flow rate of the biphenyl liquid in the biphenyl liquid discharge pipe 35 can be controlled. As a preferred embodiment, as Figure 5 shown, the biphenyl liquid connection pipe 62 is detachably connected to the first biphenyl liquid discharge valve 351. Among them, the biphenyl liquid connection pipe 62 is connected to the first biphenyl liquid discharge valve 351 through the cooperation of a flange and a bolt.

[0114] In actual use, in order to be able to use the equipment 7 for negative pressure suction of the biphenyl boiler and adding biphenyl without stopping production for other biphenyl boiler production lines, the connection between the biphenyl tank 2 and the biphenyl boiler 3 is set to be detachable. As Figure 2 shown, its working principle is as follows:

[0115] S101: Preliminary preparation: When other biphenyl boiler production lines install the biphenyl boiler for the first time or repair the biphenyl boiler, please refer to Figure 2 , install a second biphenyl steam inlet pipe 34 and a second biphenyl steam inlet valve 341 on the biphenyl steam outlet pipe 33, and install the biphenyl liquid connection pipe 62 and a second biphenyl liquid discharge valve 621;

[0116] S102: When disassembling the equipment 7 for negative pressure suction of the biphenyl boiler and adding biphenyl without stopping production that is in use, first confirm that the first biphenyl liquid discharge valve 351 and the second biphenyl steam inlet valve 341 are in a fully closed state;

[0117] S103: Confirm that the first biphenyl steam inlet valve 51, the first biphenyl liquid outlet valve 611, the second biphenyl liquid outlet valve 612, the first biphenyl liquid inlet valve 41, the second biphenyl liquid inlet valve 42, and the multi-functional valve 231 are in a fully open state;

[0118] S104: Connect a hose to the outlet end of the second biphenyl liquid discharge valve 621 and connect the hose to the biphenyl liquid storage container;

[0119] S105: Slowly open the second biphenyl liquid discharge valve 621 to drain the biphenyl liquid in the biphenyl tank 2, the biphenyl liquid connection pipe 62, the biphenyl liquid outlet pipe 61, the first biphenyl steam inlet pipe 5, the first liquid level gauge 21, and the biphenyl liquid inlet pipe 4;

[0120] S106: Remove the bolts on the flange connecting the biphenyl liquid connecting pipe 62 to the first biphenyl liquid discharge valve 351 and the bolts on the flange connecting the first biphenyl vapor inlet pipe 5 to the second biphenyl vapor inlet valve 341;

[0121] S107: After removing the biphenyl liquid inlet pipe 4 from the biphenyl barrel 1, move the above device with the biphenyl tank 2 to another production line for installation. After the installation is completed, conduct a pressure test for airtightness. Thus, the movement of the production line is completed.

[0122] This embodiment also relates to a method for adding biphenyl to a biphenyl boiler. As Figure 2 shown, after the initial installation or overhaul of the biphenyl boiler 3 is completed and before the biphenyl boiler 3 starts operation, when a large amount of biphenyl liquid needs to be added to the biphenyl boiler, the following steps are included:

[0123] S201: Confirm that the entire biphenyl boiler has completed a pressure test and there is no leakage;

[0124] S202: Confirm that the second biphenyl liquid discharge valve 621, the first biphenyl liquid inlet valve 41, and the second biphenyl liquid inlet valve 42 are in a completely closed state;

[0125] S203: Confirm that the first biphenyl liquid discharge valve 351, the first biphenyl vapor inlet valve 51, the second biphenyl vapor inlet valve 341, the first stop valve 211, the second stop valve 212, the pressure gauge stop valve 2211, the multi-functional valve 231, the first biphenyl liquid outlet valve 611, and the second biphenyl liquid outlet valve 612 are in a completely open state (opening the first biphenyl vapor inlet valve 51 and the second biphenyl vapor inlet valve 341 is to make the pressures of the biphenyl tank 2 and the biphenyl boiler 3 consistent, so that the biphenyl liquid in the biphenyl tank 2 can enter the biphenyl boiler 3);

[0126] S204: Connect the vacuum pump to the multi-functional valve 231 with a vacuum hose and start the vacuum pump;

[0127] S205: Observe the first pressure indication value shown on the first pressure gauge 22. When the first pressure indication value is close to -0.095 MPa, turn off the vacuum pump, completely close the multi-functional valve 231, and remove and move away the vacuum hose and the vacuum pump;

[0128] S206: Stretch the biphenyl liquid inlet pipe 4 to the bottom of the biphenyl barrel 1 (purchased product, containing biphenyl liquid) and fully open the first biphenyl liquid inlet valve 41;

[0129] S207: Slowly open the second biphenyl liquid inlet valve 42 to an opening degree of 1 / 3 to 1 / 2 (the purpose is to control the flow rate not to be too large to avoid or reduce pipeline vibration);

[0130] S208: Through the observation part 43, it can be seen that the biphenyl liquid is sucked out of the biphenyl barrel 1 under negative pressure, enters the biphenyl tank 2, and enters the biphenyl boiler after passing through the biphenyl liquid outlet pipe 61 and the biphenyl liquid connection pipe 62;

[0131] S209: Continue to observe through the observation part 43. If the flow rate of the biphenyl liquid is very small or there is no flow, completely close the second biphenyl liquid inlet valve 42, and replace the empty biphenyl barrel 1 with a biphenyl barrel 1 filled with biphenyl liquid;

[0132] S210: Repeat the steps of S207 - S209. At the same time during the operation, always observe the second liquid level indication value of the second liquid level gauge 31 and the third liquid level indication value of the third liquid level gauge 32; When the second liquid level indication value and the third liquid level indication value reach the biphenyl liquid level required by the process, completely close the first biphenyl liquid outlet valve 611. After that, completely close the second biphenyl liquid outlet valve 612 and the first biphenyl liquid discharge valve 351.

[0133] S211: Observe the first liquid level indication value of the first liquid level gauge 21. If the first liquid level indication value reaches the interval of 2 / 3 - 4 / 5 of the entire liquid level gauge, completely close the first biphenyl liquid inlet valve 41 and the second biphenyl liquid inlet valve 42. Thus, the work of adding a large amount of biphenyl liquid to the biphenyl boiler by negative pressure suction is completed; and there is biphenyl liquid stored in the biphenyl tank 2, and a small amount of biphenyl liquid can be added to the biphenyl boiler 3 at any time.

[0134] This embodiment also relates to a method for adding to a biphenyl boiler, as Figure 1 shown, for using the biphenyl steam of the biphenyl boiler 3 to form a negative pressure after cooling in the biphenyl tank, and sucking the biphenyl liquid in the biphenyl barrel 1 into the biphenyl tank 2; The suction method of the biphenyl tank 2 includes the following steps:

[0135] S301: Open the first biphenyl steam inlet valve 51 and the second biphenyl steam inlet valve 341, and the biphenyl steam generated by the biphenyl boiler 3 enters the biphenyl tank 2;

[0136] S302: Observe the first pressure indication value of the first pressure gauge 22. When the first pressure indication value is the same as the second pressure indication value of the second pressure gauge 36, close the first biphenyl steam inlet valve 51;

[0137] S303: The biphenyl steam in the biphenyl tank 2 naturally cools to become biphenyl liquid. When the first pressure indication value is close to -0.095 MPa, completely open the first biphenyl liquid inlet valve 41 and partially open the second biphenyl liquid inlet valve 42;

[0138] S304: Through the observation part 43, it is seen that the biphenyl liquid in the biphenyl barrel 1 is sucked into the biphenyl tank 2.

[0139] As a preferred embodiment, when adding biphenyl liquid without stopping production, the biphenyl liquid in the biphenyl barrel 1 can be sucked into the biphenyl tank 2 without using a vacuum pump to evacuate the biphenyl tank 2. This embodiment specifically includes the following steps:

[0140] S3001: Confirm that there is enough biphenyl liquid in the biphenyl barrel 1 to be added to the biphenyl tank 2;

[0141] S3002: Confirm that the first biphenyl liquid inlet valve 41, the second biphenyl liquid inlet valve 42, the first biphenyl liquid outlet valve 611, the second biphenyl liquid outlet valve 612, the multi-functional valve 231, the second biphenyl liquid discharge valve 621, the first biphenyl liquid discharge valve 351, the first biphenyl steam inlet valve 51, and the second biphenyl steam inlet valve 341 are in a completely closed state;

[0142] S3003: Confirm that the first stop valve 211, the second stop valve 212, and the pressure gauge stop valve 2211 are in a completely open state;

[0143] S3004: Open the second biphenyl steam inlet valve 341 to an opening degree of 1 / 3 to 1 / 2 (the purpose is to control the flow rate not to be too large to avoid or reduce pipeline vibration);

[0144] S3005: Open the first biphenyl steam inlet valve 51 to an opening degree of 1 / 3 to 1 / 2, and the biphenyl steam generated by the biphenyl boiler 3 enters the biphenyl tank 2;

[0145] S3006: Observe the first pressure indication value of the first pressure gauge 22. When the first pressure indication value is the same as the second pressure indication value of the second pressure gauge 36 (at this time, the biphenyl steam in the biphenyl tank 2 is saturated), close the first biphenyl steam inlet valve 51;

[0146] S3007: Wait for a period of time. The biphenyl steam in the biphenyl tank 2 naturally cools to become biphenyl liquid. At the same time, observe the first pressure gauge 22 until the first pressure indication value is close to -0.095 MPa, and then fully open the first biphenyl liquid inlet valve 41;

[0147] S3008: Slowly open the second biphenyl liquid inlet valve 42 to an opening degree of 1 / 3 to 1 / 2 (the purpose is to control the flow rate not to be too large to avoid or reduce pipeline vibration). Through the observation part 43, it is seen that the biphenyl liquid in the biphenyl barrel 1 is sucked into the biphenyl tank 2;

[0148] S3009: Continue to observe through the observation part 43. If the flow rate of the biphenyl liquid is very small or there is no flow, then fully close the second biphenyl liquid inlet valve 42;

[0149] S3010: Check the liquid level of the first liquid level indicator 21 of the first liquid level value and calculate whether the volume of the biphenyl liquid in the biphenyl tank 2 is sufficient; if not, repeat the steps of S3005 - S3009; if sufficient, completely close the first biphenyl liquid inlet valve 41 and the second biphenyl vapor inlet valve 341; thus, the work of adding biphenyl liquid to the biphenyl tank 2 using the principle of negative pressure suction is completed.

[0150] According to some embodiments of the present application, optionally, after the biphenyl liquid is sucked into the biphenyl tank 2 and it is determined by the liquid level gauge of the biphenyl tank 2 that the liquid inside is sufficient, the method for adding to the biphenyl boiler further includes the following steps:

[0151] S401: Slowly open the first biphenyl vapor inlet valve 51, and the biphenyl vapor generated by the biphenyl boiler 3 enters the biphenyl tank 2;

[0152] S402: Observe the first pressure indication value of the first pressure gauge 22. When the first pressure indication value is the same as the second pressure indication value of the second pressure gauge 36, open the first biphenyl liquid outlet valve 611 to an opening degree of 1 / 3 to 1 / 2;

[0153] S403: Slowly open the second biphenyl liquid outlet valve 612, and observe the first liquid level indication value of the liquid level gauge of the biphenyl tank 2 until the first liquid level indication value slowly decreases and then stop opening the second biphenyl liquid outlet valve 612. At this time, a small amount of the biphenyl liquid in the biphenyl tank 2 enters the biphenyl boiler 3;

[0154] S404: Close the second biphenyl liquid outlet valve 612 to a reduced opening degree of 1 / 3 to 1 / 2. At this time, a small amount of the biphenyl liquid in the biphenyl tank 2 enters the biphenyl boiler 3. At this time, observe the second liquid level indication value of the second liquid level gauge 31 until the second liquid level indication value reaches the process requirements, and then close the second biphenyl liquid outlet valve 612.

[0155] As a preferred embodiment, as Figure 4 shown, during the normal production of the biphenyl boiler, it is possible to add biphenyl liquid to the biphenyl boiler in a small and uniform amount without affecting the normal production of the production line. The method for adding to the biphenyl boiler further includes the following steps:

[0156] S4001: Check the first liquid level indication value of the first liquid level gauge 21 and calculate whether the volume of the biphenyl liquid in the biphenyl tank 2 is sufficient; if not, add biphenyl liquid to the biphenyl tank 2 according to S3001 - S3010;

[0157] S4002: Confirm that the first diphenyl liquid outlet valve 611, the second diphenyl liquid outlet valve 612, the first diphenyl liquid inlet valve 41, the second diphenyl liquid inlet valve 42, the second diphenyl liquid discharge valve 621, the first diphenyl liquid discharge valve 351, the first diphenyl vapor inlet valve 51, the second diphenyl vapor inlet valve 341, and the multi-functional valve 231 are in a completely closed state;

[0158] S4003: Confirm that the first stop valve 211, the second stop valve 212, and the pressure gauge stop valve 2211 are in a completely open state;

[0159] S4004: Slowly open the first diphenyl liquid discharge valve 351, the first diphenyl vapor inlet valve 51, and the second diphenyl vapor inlet valve 341. The diphenyl vapor generated by the diphenyl boiler 3 enters the diphenyl tank 2;

[0160] S4005: Observe the first pressure indication value of the first pressure gauge 22. When the first pressure indication value is the same as the second pressure indication value of the second pressure gauge 36, open the first diphenyl liquid outlet valve 611 to an opening degree of 1 / 3 to 1 / 2;

[0161] S4006: Slowly open the second diphenyl liquid outlet valve 612 and observe the first liquid level indication value of the first liquid level gauge 21 until the first liquid level indication value slowly decreases, then stop opening the second diphenyl liquid outlet valve 612. At this time, a small amount of diphenyl liquid in the diphenyl tank 2 enters the diphenyl boiler 3;

[0162] S4007: Adjust the opening degree of the second diphenyl liquid outlet valve 612 to about 1 / 3 to 1 / 2 (so that the flow rate of the diphenyl liquid entering the diphenyl boiler per unit time is less than 0.5 liters per minute. As long as there is a small amount of diphenyl liquid slowly entering the diphenyl boiler, it is okay - for the 30 to 90 kW or even larger electric heating power of the diphenyl boiler, a small amount of diphenyl liquid entering from its bottom causes very little temperature fluctuation of the diphenyl vapor, not exceeding the temperature fluctuation range required by the process);

[0163] S4008: Observe the second liquid level indication value of the second liquid level gauge 31 and the third liquid level indication value of the third liquid level gauge 32. If the second liquid level indication value and the third liquid level indication value reach the diphenyl liquid level required by the process, then completely close the second diphenyl liquid outlet valve 612;

[0164] S4009: Completely close the first diphenyl liquid outlet valve 611, the first diphenyl liquid discharge valve 351, the first diphenyl vapor inlet valve 51, and the second diphenyl vapor inlet valve 341; thus, the work of adding diphenyl liquid to the diphenyl boiler at a uniform and small amount is completed.

[0165] In the above manner, production is not stopped, and during the normal production of the diphenyl boiler, the minute flow rate added is precisely controlled through the first diphenyl liquid outlet valve 611 and the second diphenyl liquid outlet valve 612, thereby avoiding large fluctuations in the diphenyl steam temperature and affecting the normal production of the production line.

[0166] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solution obtained by equivalent structure or equivalent process substitution or modification based on the substantial concept of the present application and using the content recorded in the text and drawings of the specification of the present application, as well as any technical solution directly or indirectly implementing the above embodiments in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. An equipment for negative pressure suction and continuous addition of biphenyl to a biphenyl boiler, characterized in that, Comprising: Diphenyl tank; Diphenyl liquid inlet pipe, one end of the diphenyl liquid inlet pipe is used to communicate with a diphenyl barrel, and the other end of the diphenyl liquid inlet pipe communicates with the diphenyl tank; First diphenyl vapor inlet pipe, one end of the first diphenyl vapor inlet pipe communicates with the diphenyl tank, and the other end of the first diphenyl vapor inlet pipe is used to communicate with the diphenyl vapor outlet pipe of a diphenyl boiler. The first diphenyl vapor inlet pipe is used to transport the diphenyl vapor generated by the diphenyl boiler to the diphenyl tank. A first diphenyl vapor inlet valve is provided on the first diphenyl vapor inlet pipe, and the first diphenyl vapor inlet valve controls the flow rate of the diphenyl vapor in the first diphenyl vapor inlet pipe by adjusting the opening degree; Diphenyl liquid outlet pipe assembly, one end of the diphenyl liquid outlet pipe assembly communicates with the liquid outlet of the diphenyl tank, and the other end of the diphenyl liquid outlet pipe assembly is used to communicate with the liquid discharge port of the diphenyl boiler. The diphenyl liquid outlet pipe assembly is used to transport the diphenyl liquid in the diphenyl tank to the diphenyl boiler; Wherein, the diphenyl tank is used to condense the diphenyl vapor generated by the diphenyl boiler to generate negative pressure, and then suck the diphenyl liquid in the diphenyl barrel through the diphenyl liquid inlet pipe.

2. The equipment for negative pressure suction and continuous addition of biphenyl to a biphenyl boiler according to claim 1, characterized in that A first diphenyl liquid inlet valve is provided on the diphenyl liquid inlet pipe, and the first diphenyl liquid inlet valve controls the flow rate of the diphenyl liquid in the diphenyl liquid inlet pipe by adjusting the opening degree.

3. The equipment for negative pressure suction and continuous addition of biphenyl to a biphenyl boiler according to claim 1, characterized in that, An observation part is provided on the diphenyl liquid inlet pipe, and the observation part is used to observe the condition of the diphenyl liquid in the diphenyl barrel being sucked by the diphenyl tank.

4. The equipment for negative pressure suction and continuous addition of biphenyl to a biphenyl boiler according to claim 1, characterized in that The diphenyl liquid outlet pipe assembly includes a diphenyl liquid outlet pipe and a diphenyl liquid connection pipe; The diphenyl liquid outlet pipe communicates with the diphenyl tank, the diphenyl liquid outlet pipe communicates with the diphenyl liquid connection pipe, and the diphenyl liquid connection pipe communicates with the diphenyl boiler.

5. The equipment for negative pressure suction and continuous addition of biphenyl to a biphenyl boiler according to claim 4, characterized in that, A first diphenyl liquid outlet valve is provided on the diphenyl liquid outlet pipe, and the first diphenyl liquid outlet valve controls a small amount of the diphenyl liquid in the diphenyl tank to enter the diphenyl boiler by adjusting the opening degree.

6. The equipment for adding biphenyl under negative pressure suction without stopping production for a biphenyl boiler according to claim 5, characterized in that, A second diphenyl liquid outlet valve is further provided on the diphenyl liquid outlet pipe, and the second diphenyl liquid outlet valve controls a trace amount of the diphenyl liquid in the diphenyl tank to enter the diphenyl boiler by adjusting the opening degree.

7. A biphenyl boiler device, characterized in that, Comprising: The equipment for negative pressure suction and continuous production addition of diphenyl to a diphenyl boiler according to any one of claims 1-6; Diphenyl barrel, the diphenyl barrel is filled with diphenyl liquid, and the diphenyl barrel communicates with the diphenyl liquid inlet pipe; Diphenyl boiler, the diphenyl boiler includes a diphenyl vapor outlet pipe and a diphenyl liquid discharge pipe, the diphenyl vapor outlet pipe communicates with the first diphenyl vapor inlet pipe, and the diphenyl liquid discharge pipe communicates with the diphenyl liquid outlet pipe assembly.

8. A method for adding to a biphenyl boiler, characterized in that, Adopt the biphenyl boiler device described in claim 7, and utilize the negative pressure formed after the biphenyl steam in the biphenyl boiler is cooled in the biphenyl tank to suck the biphenyl liquid in the biphenyl barrel into the biphenyl tank; the adding method for the biphenyl boiler includes the following steps: Open the first biphenyl steam inlet valve, and the biphenyl steam generated by the biphenyl boiler enters the biphenyl tank; Observe the first pressure indication value of the first pressure gauge. When the first pressure indication value is the same as the second pressure indication value of the second pressure gauge, close the first biphenyl steam inlet valve; The biphenyl steam in the biphenyl tank naturally cools to become biphenyl liquid. When the first pressure indication value is close to -0.095 MPa, fully open the first biphenyl liquid inlet valve. At this time, it can be seen through the observation part that the biphenyl liquid in the biphenyl barrel is sucked into the biphenyl tank.

9. The addition method for a biphenyl boiler according to claim 8, characterized in that, After the biphenyl liquid is sucked into the biphenyl tank and it is judged that the liquid in the biphenyl tank is sufficient through the first liquid level indication value of the first liquid level gauge, the adding method for the biphenyl boiler further includes the following steps: Slowly open the first biphenyl steam inlet valve, and the biphenyl steam generated by the biphenyl boiler enters the biphenyl tank; Observe the first pressure indication value of the first pressure gauge. When the first pressure indication value is the same as the second pressure indication value of the second pressure gauge, open the first biphenyl liquid outlet valve to an opening degree of 1 / 3 to 1 / 2; Slowly open the second biphenyl liquid outlet valve, and observe the first liquid level indication value of the liquid level gauge of the biphenyl tank until the opening of the second biphenyl liquid outlet valve is stopped when the first liquid level indication value slowly decreases. At this time, a small amount of the biphenyl liquid in the biphenyl tank enters the biphenyl boiler; Reduce the opening of the second biphenyl liquid outlet valve by 1 / 3 to 1 / 2. At this time, a small amount of the biphenyl liquid in the biphenyl tank enters the biphenyl boiler; Observe the second liquid level indication value of the second liquid level gauge until the second liquid level indication value meets the process requirements, and then close the second biphenyl liquid outlet valve.

Images