Maleic anhydride direct supply system of BDO device

Abstract

The utility model relates to the technical field of chemical production, in particular to a maleic anhydride direct supply system of a BDO device. The tank field feeding main pipeline is respectively connected with a maleic anhydride feeding pipeline; the maleic anhydride tank field large tank is connected with a tank field feeding main pipeline; an inlet of the feeding pump is connected with the maleic anhydride tank field large tank; the tank field feeding pipeline is connected with an outlet of the feeding pump, and the BDO device feeding pipeline is connected with the tank field feeding pipeline; the maleic anhydride direct supply pipeline is led out from a maleic anhydride incoming pipeline to a BDO device feeding pipeline, and a direct supply valve is arranged on the maleic anhydride direct supply pipeline. By arranging a double-path feeding pipeline including a tank field feeding pipeline and a maleic anhydride direct supply pipeline, direct supply of maleic anhydride or combination of direct supply of maleic anhydride and tank field feeding can be selected, so that raw materials capable of meeting requirements can be provided for downstream devices; as long as the direct supply valve is opened in the process, the influence of the maleic anhydride quality on a downstream BDO device can be reduced to a certain extent, the heat loss of the maleic anhydride material is reduced, and the energy consumption of the BDO device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to a maleic anhydride direct supply system for a BDO device. Background Art

[0002] 1,4-Butanediol (BDO for short) is an important organic chemical and fine chemical raw material. BDO and its derivatives can be widely used in PBT plastics, spandex, polyurethane, pharmaceuticals, cosmetics and other fields. The production methods of BDO include acetylene method, maleic anhydride hydrogenation method and butadiene method, among which maleic anhydride hydrogenation method is more widely used.

[0003] However, in the current process, the raw material maleic anhydride of the BDO production line is provided by the tank area. After the maleic anhydride is produced by the maleic anhydride workshop and qualified, it is pumped to the maleic anhydride storage tank area, and then pumped from the maleic anhydride storage tank area to the DBO device. Due to the unstable quality of maleic anhydride materials and the long storage time, the maleic anhydride color becomes darker and heat is lost. The color change and energy change of maleic anhydride have a great impact on BDO products. Utility Model Content

[0004] In view of the defects of the prior art, the utility model provides a direct supply system for maleic anhydride of a BDO device, which newly adds a direct supply line from the maleic anhydride device to the BDO device, reduces the impact of maleic anhydride quality on the BDO device, reduces the heat loss of maleic anhydride materials, reduces the energy consumption of the BDO device, and can control the upstream feed pipeline according to the state of the downstream BDO device, so that the system is more flexible.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is a direct supply system for maleic anhydride of a BDO device, which includes a maleic anhydride incoming pipeline, a tank area feed main pipeline, a maleic anhydride tank area large tank, a feed pump, a tank area feed pipeline, a BDO device feed pipeline, and a maleic anhydride direct supply pipeline; the tank area feed main pipeline is respectively connected to the maleic anhydride incoming pipeline; the maleic anhydride tank area large tank is connected to the tank area feed main pipeline; the inlet of the feed pump is connected to the maleic anhydride tank area large tank; the tank area feed pipeline is connected to the outlet of the feed pump, and the BDO device feed pipeline is connected to the tank area feed pipeline; the maleic anhydride direct supply pipeline is led out from the maleic anhydride incoming pipeline to the BDO device feed pipeline, and a direct supply valve is provided on the maleic anhydride direct supply pipeline.

[0006] Further, the BDO device feed pipeline includes a first BDO device feed pipeline and a second BDO device feed pipeline, the first BDO device feed pipeline is connected to the first BDO device, and the second BDO device feed pipeline is connected to the second BDO device.

[0007] Furthermore, a first BDO device feed valve is provided on the first BDO device feed pipeline, and a second BDO device feed valve is provided on the second BDO device feed pipeline.

[0008] Furthermore, the maleic anhydride direct supply pipeline is connected to the first BDO device feed pipeline through a first branch pipeline, and the maleic anhydride direct supply pipeline is connected to the second BDO device feed pipeline through a second branch pipeline.

[0009] Further, the meeting point of the first branch pipeline and the first BDO device feed pipeline is downstream of the first BDO device feed valve, and the meeting point of the second branch pipeline and the second BDO device feed pipeline is downstream of the second BDO device feed valve.

[0010] Furthermore, the first branch pipeline is provided with a first branch pipeline valve, and the second branch pipeline is provided with a second branch pipeline valve.

[0011] Furthermore, the maleic anhydride feed pipeline is located in the 1.15MPa boundary area, the maleic anhydride tank area large tank is located in the 1.1MPa boundary area, and the first BDO device and the second BDO device are located in the 0.5MPa boundary area.

[0012] Furthermore, there are a plurality of maleic anhydride feed pipelines, and each maleic anhydride feed pipeline is provided with a feed valve.

[0013] Beneficial effects of the utility model: The maleic anhydride direct supply system of the BDO device can select maleic anhydride direct supply or maleic anhydride direct supply combined with tank area supply by setting up a dual-path supply pipeline of the tank area supply pipeline and the maleic anhydride direct supply pipeline, so as to provide the downstream device with raw materials that can meet the demand. Among them, the maleic anhydride direct supply pipeline is directly supplied to the downstream BDO device through the maleic anhydride direct supply pipeline from the maleic anhydride incoming pipeline, and the maleic anhydride in the maleic anhydride direct supply pipeline will not cause a large amount of heat loss and discoloration due to long-term storage and long-distance transportation, that is, the material temperature from the maleic anhydride direct supply pipeline is higher, the energy is higher, the energy that can be used by the downstream BDO device is more, and the feed temperature is higher. However, when the temperature of the downstream BDO device is already high and there is no need to further increase the feed temperature, the direct supply valve can be opened while the tank area feed pipeline is used for synchronous feeding, so that the feed temperature of the downstream BDO device can meet the demand and avoid energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a process flow chart of a maleic anhydride direct supply system of a BDO device in one embodiment of the utility model;

[0015] In the figure:

[0016] 100, maleic anhydride incoming pipeline, 110, incoming valve,

[0017] 200. Main feed pipeline in tank area,

[0018] 300. Maleic anhydride tank area,

[0019] 400, feed pump,

[0020] 500. Tank area feed pipeline,

[0021] 600, BDO device feed pipeline, 610, first BDO device feed pipeline, 611, first BDO device feed valve, 620, second BDO device feed pipeline, 621, second BDO device feed valve,

[0022] 700, maleic anhydride direct supply pipeline, 710, direct supply valve, 720, first branch pipeline, 721, first branch pipeline valve, 730, second branch pipeline, 731, second branch pipeline valve,

[0023] 800. a first BDO device,

[0024] 900. A second BDO device. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0026] See also Figure 1, a process flow chart of a maleic anhydride direct supply system of a BDO device in one embodiment of the utility model is shown, which includes a maleic anhydride incoming pipeline 100, a tank area feed main pipeline 200, a maleic anhydride tank area large tank 300, a feed pump 400, a tank area feed pipeline 500, a BDO device feed pipeline 600 and a maleic anhydride direct supply pipeline 700; the tank area feed main pipeline 200 is respectively connected to the maleic anhydride incoming pipeline 100; during specific production, multiple maleic anhydride storage tanks (not shown in the figure) located in the maleic anhydride device are respectively connected to the maleic anhydride through multiple maleic anhydride The incoming material pipeline 100 is connected to the tank area feed main pipeline 200, and the maleic anhydride tank area large tank 300 is connected to the tank area feed main pipeline 200; the inlet of the feed pump 400 is connected to the maleic anhydride tank area large tank 300; the tank area feed pipeline 500 is connected to the outlet of the feed pump 400; the BDO device feed pipeline 600 is connected to the tank area feed pipeline 500; the maleic anhydride direct supply pipeline 700 is led out from the maleic anhydride incoming material pipeline 100 to the BDO device feed pipeline 600, and a direct supply valve 710 is provided on the maleic anhydride direct supply pipeline 700.

[0027] The above-mentioned maleic anhydride direct supply system of the BDO device can select maleic anhydride direct supply or select maleic anhydride direct supply combined with tank area supply by setting up dual feed pipelines of tank area feed pipeline 500 and maleic anhydride direct supply pipeline 700, so as to provide raw materials that can meet the demand of the downstream BDO device. Among them, the maleic anhydride direct supply pipeline 700 directly supplies the downstream BDO device from the maleic anhydride incoming pipeline 100 through the maleic anhydride direct supply pipeline 700, and the maleic anhydride in the maleic anhydride direct supply pipeline 700 will not cause a large amount of heat loss and discoloration due to long-term storage and long-distance transportation, that is, the material temperature from the maleic anhydride direct supply pipeline 700 is higher, the energy is higher, the energy that can be used by the downstream BDO device is more, and the feed temperature is higher. However, when the temperature of the downstream BDO device is already high and there is no need to further increase the feed temperature, the direct supply valve 710 can be opened while the tank area feed pipeline 500 is used for synchronous feed, so that the feed temperature of the downstream BDO device can meet the demand and avoid energy waste.

[0028] It should be noted that, in this embodiment, as long as the direct supply valve 710 is opened in the process, the impact of maleic anhydride quality on the downstream BDO device can be reduced to a certain extent, the heat loss of maleic anhydride materials can be reduced, and the energy consumption of the BDO device can be reduced.

[0029] Furthermore, in one embodiment, a direct supply pump (not shown in the figure) is provided on the maleic anhydride direct supply pipeline 700 to pump the materials in the maleic anhydride incoming pipelines 100 to the downstream BDO device.

[0030] In one embodiment, the BDO device feed line 600 includes a first BDO device feed line 610 and a second BDO device feed line 620 , wherein the first BDO device feed line 610 is connected to the first BDO device 800 , and the second BDO device feed line 620 is connected to the second BDO device 900 .

[0031] In one embodiment, a first BDO device feed valve 611 is disposed on the first BDO device feed pipeline 610 , and a second BDO device feed valve 621 is disposed on the second BDO device feed pipeline 620 .

[0032] In one embodiment, the maleic anhydride direct supply line 700 is connected to the first BDO device feed line 610 via a first branch line 720, and the maleic anhydride direct supply line 700 is connected to the second BDO device feed line 620 via a second branch line 730.

[0033] In one embodiment, the meeting point of the first branch line 720 and the first BDO device feed line 610 is downstream of the first BDO device feed valve 611, and the meeting point of the second branch line 730 and the second BDO device feed line 620 is downstream of the second BDO device feed valve 621.

[0034] In one embodiment, the first branch pipeline 720 is provided with a first branch pipeline valve 721, and the second branch pipeline 730 is provided with a second branch pipeline valve 731.

[0035] In one embodiment, the maleic anhydride feed pipeline 100 is located in the 1.15 MPa limit zone, the maleic anhydride tank 300 is located in the 1.1 MPa limit zone, and the first BDO device 800 and the second BDO device 900 are located in the 0.5 MPa limit zone.

[0036] In one embodiment, a plurality of maleic anhydride incoming pipelines 100 are provided, and each maleic anhydride incoming pipeline 100 is provided with an incoming valve 110 .

[0037] See also Figure 1 It should be noted that, in the specific configuration, in one embodiment, the direct supply valve 710, the first branch pipeline valve 721, the second branch pipeline valve 731, the first BDO device feed valve 611, and the second BDO device feed valve 621 can all be configured as flow regulating valves.

[0038] During the production process, the reaction status and feed temperature of the downstream first BDO device 800 and the second BDO device 900 are monitored, and then the openings of the direct supply valve 710, the first branch pipeline valve 721, the second branch pipeline valve 731, the first BDO device feed valve 611, and the second BDO device feed valve 621 are controlled to adjust the feed ratio, so as to optimize the feed temperature and feed status at the next moment.

[0039] Preferably, in one embodiment, temperature measuring devices are respectively installed at the feed inlets of the first BDO device 800 and the second BDO device 900 to detect the feed temperature and control the opening of each valve. Furthermore, the feed ratio of the first BDO device 800 can be controlled by the first BDO device feed valve 611 and the first branch pipeline valve 721. Similarly, the feed ratio of the second BDO device 900 can be controlled by the second BDO device feed valve 621 and the second branch pipeline valve 731. Such an arrangement greatly improves the flexibility of the system and can reasonably control the feed according to the downstream production status.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A direct supply system of maleic anhydride for a BDO device, characterized by: include Maleic anhydride incoming pipeline; The main feed pipeline of the tank area is connected with the maleic anhydride feed pipeline respectively; A large tank in the maleic anhydride tank area, connected to the main feed pipeline of the tank area; A feed pump, the inlet of which is connected to the large tank in the maleic anhydride tank area; A tank area feed pipeline connected to the outlet of the feed pump; A BDO unit feed pipeline connected to the tank farm feed pipeline; as well as The maleic anhydride direct supply pipeline is led out from the maleic anhydride incoming pipeline to the BDO device feed pipeline, and a direct supply valve is arranged on the maleic anhydride direct supply pipeline.

2. A BDO device maleic anhydride direct supply system according to claim 1, characterized in that: The BDO device feed pipeline includes a first BDO device feed pipeline and a second BDO device feed pipeline, the first BDO device feed pipeline is connected to the first BDO device, and the second BDO device feed pipeline is connected to the second BDO device.

3. A BDO device maleic anhydride direct supply system according to claim 2, characterized in that: The first BDO device feed pipeline is provided with a first BDO device feed valve, and the second BDO device feed pipeline is provided with a second BDO device feed valve.

4. A BDO device maleic anhydride direct supply system according to claim 3, characterized in that: The maleic anhydride direct supply pipeline is connected to the first BDO device feed pipeline through a first branch pipeline, and the maleic anhydride direct supply pipeline is connected to the second BDO device feed pipeline through a second branch pipeline.

5. The direct supply system of maleic anhydride for BDO device according to claim 4, characterized in that: The meeting point of the first branch pipeline and the first BDO device feed pipeline is downstream of the first BDO device feed valve, and the meeting point of the second branch pipeline and the second BDO device feed pipeline is downstream of the second BDO device feed valve.

6. The direct supply system of maleic anhydride for a BDO device according to claim 4, characterized in that: The first branch pipeline is provided with a first branch pipeline valve, and the second branch pipeline is provided with a second branch pipeline valve.

7. The direct supply system of maleic anhydride for a BDO device according to claim 2, characterized in that: The maleic anhydride feed pipeline is located in the 1.15MPa boundary area, the maleic anhydride tank area large tank is located in the 1.1MPa boundary area, and the first BDO device and the second BDO device are located in the 0.5MPa boundary area.

8. A direct supply system for maleic anhydride in a BDO device according to any one of claims 1 to 7, characterized in that: There are multiple maleic anhydride feed pipelines, and each maleic anhydride feed pipeline is provided with a feed valve.

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