Reduction catalyst system

Abstract

The utility model provides a reduction catalyst system, which comprises a reduction reactor, a liquid inlet, a liquid outlet and a catalyst inlet, the reduction reactor is provided with a reaction cavity and a liquid inlet which are communicated with each other, and the reaction cavity is used for placing a catalyst; the storage tank is provided with a liquid outlet and a liquid storage cavity which are communicated with each other, and the liquid storage cavity is used for storing heavy firewood; the feeding pipeline is provided with a first end and a second end which are oppositely arranged, the first end of the feeding pipeline is communicated with the liquid outlet, the second end of the feeding pipeline is communicated with the liquid inlet, and a feeding pump is arranged on the feeding pipeline; one end of the first pressure relief pipeline is communicated with the feeding pipeline, the other end of the first pressure relief pipeline is used for being communicated with an oil tank, and a first pressure relief valve is arranged on the first pressure relief pipeline. According to the technical scheme, the problem that in the prior art, the risk of overpressure leakage of a conveying pipeline of a reduction catalyst system is high can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reduction catalyst systems, in particular to a reduction catalyst system. Background Art

[0002] The main task of the Fischer-Tropsch synthesis unit is to convert the purified synthesis gas (mainly carbon monoxide and hydrogen) washed from the upstream low-temperature methanol into naphtha, wax, heavy oil and a small amount of condensate under the action of iron-based catalyst in a slurry bed reactor at 270℃ and 2.8MPa pressure. The catalyst used in normal production of the Fischer-Tropsch synthesis unit is reduced iron carbide Fe x C, but the catalyst initially exists in the form of oxide Fe2O3, so the initial catalyst must first undergo a reduction reaction in a reduction reactor. The reduction reactor requires heavy wood to mix and suspend the catalyst in it, and a purified gas containing CO and H2 is introduced into the bottom of the reactor for a circulated reaction.

[0003] The catalyst reduction process is briefly described as follows: After nitrogen replacement in the reduction reactor is completed and airtight, the compressor is started to circulate, hydrogen is introduced to replace the nitrogen, and heavy fuel oil is added to the reduction reactor. Finally, the oxidized iron-based catalyst is added to the reduction reactor via dense phase conveying. The reduction reactor is equipped with a feed gas heater and heated with 5.4 MPa steam. The temperature is gradually raised to 120°C, ranging from 120 to 180°C. When the temperature reaches 180°C, purified synthesis gas (primarily composed of CO and H2) is introduced, and the ratio of hydrogen to carbon monoxide is adjusted. The temperature is then raised to 265°C and maintained at this temperature for 24 hours. Parameters are specified for each heating stage, and the entire reduction process must reduce the CO content in the exhaust gas. The pressure during the reduction process is controlled at approximately 3.1 MPa. The reaction process can be expressed as follows: 3Fe2O3 + H2 => 2Fe3O4 + H2O; 3Fe2O3 + CO => 2Fe3O4 + CO2; xFe3O4 + (4x + 6)CO => 3Fe x C+(4x+3)CO2.

[0004] In the prior art, heavy firewood is transported from a storage tank to a reduction reactor through a conveying pipeline. After the heavy firewood is added, some of the heavy firewood remains in the conveying pipeline. Due to the presence of heat, especially in summer, after the material stored in the conveying pipeline is heated for a long time, part of the medium of the heavy firewood in the conveying pipeline is vaporized, making the conveying pipeline have a high risk of overpressure leakage, thereby leading to the occurrence of safety accidents. Utility Model Content

[0005] The utility model provides a reduction catalyst system to solve the problem of high risk of overpressure leakage in the delivery pipeline of the reduction catalyst system in the prior art.

[0006] The utility model provides a reduction catalyst system, which includes: a reduction reactor, wherein the reduction reactor has a reaction chamber and a liquid inlet that are interconnected, and the reaction chamber is used to place a catalyst; a storage tank, wherein the storage tank has a liquid outlet and a liquid storage chamber that are interconnected, and the liquid storage chamber is used to store heavy firewood; a feeding pipeline, wherein the feeding pipeline has a first end and a second end that are relatively arranged, the first end of the feeding pipeline is connected to the liquid outlet, the second end of the feeding pipeline is connected to the liquid inlet, and a feeding pump is provided on the feeding pipeline; a first pressure relief pipeline, wherein one end of the first pressure relief pipeline is connected to the feeding pipeline, and the other end of the first pressure relief pipeline is used to be connected to the oil tank, and a first pressure relief valve is provided on the first pressure relief pipeline.

[0007] Furthermore, the storage tank has a reflux port, which is connected to the liquid storage chamber. The reduction catalyst system also includes: a feeding pipeline, the feeding pipeline has a first end and a second end arranged opposite to each other, the first end of the feeding pipeline is connected to the liquid outlet, the second end of the feeding pipeline is connected to the liquid inlet, and a feeding pump is provided on the feeding pipeline; a second pressure relief pipeline, one end of the second pressure relief pipeline is connected to the feeding pipeline, the other end of the second pressure relief pipeline is connected to the reflux port, and a second pressure relief valve is provided on the second pressure relief pipeline.

[0008] Furthermore, the reduction catalyst system also includes: a confluence line, one end of which is connected to the second end of the feeding line and the second end of the replenishing line, and the other end of the confluence line is connected to the liquid inlet, and a first shut-off valve and multiple one-way valves are provided on the confluence line.

[0009] Furthermore, a second shut-off valve is provided on the feeding pipeline, and a third shut-off valve is provided on the replenishing pipeline.

[0010] Furthermore, a heater and a control valve are provided on the feed pipeline, and the control valve is used to control the flow of the feed pipeline.

[0011] Furthermore, a first pressure gauge is provided on the feeding pipeline, and a second pressure gauge is provided on the feeding pipeline.

[0012] Furthermore, a heating structure is provided in the reaction chamber to heat the reduction reaction of the catalyst.

[0013] Furthermore, the heating structure is a coil structure, and the coil structure is used to circulate heating steam.

[0014] Furthermore, the reduction catalyst system also includes: a control system, which is electrically connected to the first shut-off valve, the second shut-off valve and the third shut-off valve, and the control system can synchronously control the switching of the first shut-off valve and the second shut-off valve, and the control system can synchronously control the switching of the first shut-off valve and the third shut-off valve.

[0015] Furthermore, a vent pipe is provided on the storage tank, one end of the vent pipe is connected to the liquid storage chamber, and the other end of the vent pipe is used to communicate with the outside world.

[0016] According to the technical solution of the present invention, a feeding line can connect the liquid storage chamber and the reaction chamber. A feeding pump is provided on the feeding line, and the feeding line is connected to a first pressure relief line, which is provided with a first pressure relief valve. When heavy fuel oil is injected into the reduction reactor, the first pressure relief valve is closed. When the feeding pump stops working, the first pressure relief valve is opened. This arrangement can discharge the heavy fuel oil in the feeding line, thereby completing the pressure relief of the feeding line, avoiding safety accidents such as overpressure leakage in the feeding line, improving the reliability of the reduction catalyst system, eliminating major hidden dangers in the reduction catalyst system, and ensuring the normal operation of the reduction catalyst system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 The schematic diagram of the structure of the reduction catalyst system provided by the utility model is shown.

[0019] The above drawings include the following reference numerals:

[0020] 10. Reduction reactor;

[0021] 20. Storage tank;

[0022] 31. Feeding pipeline;

[0023] 32. Feeding pump;

[0024] 33. Second shut-off valve;

[0025] 34. First pressure gauge;

[0026] 41. First pressure relief line;

[0027] 42. First pressure relief valve;

[0028] 51. Feeding pipeline;

[0029] 52. Feed pump;

[0030] 53. The third shut-off valve;

[0031] 54. Heater;

[0032] 55. Control valve;

[0033] 56. Second pressure gauge;

[0034] 61. Second pressure relief line;

[0035] 62. Second pressure relief valve;

[0036] 71. Confluence pipeline;

[0037] 72. First shut-off valve;

[0038] 73. One-way valve. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] like Figure 1 As shown, an embodiment of the present invention provides a reduction catalyst system, which includes a reduction reactor 10, a storage tank 20, a feeding pipeline 31 and a first pressure relief line 41. The reduction reactor 10 has a reaction chamber and a liquid inlet that are interconnected, and the reaction chamber is used to place the catalyst. The storage tank 20 has a liquid outlet and a liquid storage chamber that are interconnected, and the liquid storage chamber is used to store heavy fuel oil. The feeding pipeline 31 has a first end and a second end that are relatively arranged, the first end of the feeding pipeline 31 is connected to the liquid outlet, the second end of the feeding pipeline 31 is connected to the liquid inlet, and a feeding pump 32 is provided on the feeding pipeline 31. One end of the first pressure relief line 41 is connected to the feeding pipeline 31, and the other end of the first pressure relief line 41 is used to communicate with the oil tank, and a first pressure relief valve 42 is provided on the first pressure relief line 41.

[0041] By applying the technical solution of the present application, the feeding line 31 can connect the liquid storage chamber and the reaction chamber. The feeding line 31 is provided with a feeding pump 32, and the feeding line 31 is connected to the first pressure relief line 41. The first pressure relief line 41 is provided with a first pressure relief valve 42. When heavy fuel oil is injected into the reduction reactor 10, the first pressure relief valve 42 is in a closed state. When the feeding pump 32 stops working, the first pressure relief valve 42 is in an open state. Such a configuration can discharge the heavy fuel oil in the feeding line 31, thereby completing the pressure relief of the feeding line 31, avoiding the safety accident of overpressure leakage in the feeding line 31, improving the reliability of the reduction catalyst system, eliminating the major hidden dangers of the reduction catalyst system, and ensuring the normal operation of the reduction catalyst system.

[0042] In the present application, the storage tank 20 is operated at normal pressure, and the temperature of the storage tank 20 is controlled at 70°C.

[0043] In addition, the feeding pump 32 is used to continuously add fuel oil to the reduction reactor 10 before the temperature is raised. The flow rate of the feeding pipeline 31 is 60m 3 / h.

[0044] Specifically, the storage tank 20 has a reflux port, which is communicated with the liquid storage chamber.

[0045] The catalyst reduction system further includes a feeding line 51 and a second pressure relief line 61 .

[0046] The feeding pipeline 51 has a first end and a second end that are oppositely arranged. The first end of the feeding pipeline 51 is connected to the liquid outlet, and the second end of the feeding pipeline 51 is connected to the liquid inlet. A feeding pump 52 is provided on the feeding pipeline 51.

[0047] One end of the second pressure relief line 61 is connected to the feeding line 51 , and the other end of the second pressure relief line 61 is connected to the reflux port. A second pressure relief valve 62 is provided on the second pressure relief line 61 .

[0048] When the reduction reactor 10 has started reduction and the amount of heavy fuel oil in the reduction reactor 10 is insufficient, the feed pump 52 can replenish heavy fuel oil for the reduction reactor 10 to ensure the normal progress of the reduction reaction in the reduction reactor 10 .

[0049] Moreover, with such an arrangement, when the feeding pump 52 injects heavy fuel oil into the reduction reactor 10, the second pressure relief valve 62 is in a closed state; when the feeding pump 52 stops working, the second pressure relief valve 62 is in an open state. With such an arrangement, the heavy fuel oil in the feeding pipeline 51 can be discharged, thereby completing the pressure relief of the feeding pipeline 51, avoiding the safety accident of overpressure leakage in the feeding pipeline 51, further improving the reliability of the reduction catalyst system, eliminating the major hidden dangers in the reduction catalyst system, and ensuring the normal operation of the reduction catalyst system.

[0050] At the same time, the heavy wood remaining in the feeding pipeline 51 can flow back into the storage tank 20, which can reduce waste and improve the utilization rate of the heavy wood.

[0051] Specifically, the flow rate of the feed line 51 is 15m 3 With this arrangement, since the flow rate of the feeding pipeline 51 is relatively small, when the heavy wood in the feeding pipeline 51 flows back into the storage tank 20, the impact on the storage tank 20 is relatively small, thereby avoiding damage to the storage tank 20.

[0052] Furthermore, in the present application, two feeding pumps 52 are provided on the feeding pipeline 51, one of which operates normally and the other is on standby. Such an arrangement can ensure the normal progress of the feeding work, avoid the lack of heavy firewood for the reduction reaction, and ensure the normal operation of the reduction reactor 10.

[0053] In this application, the outlet pressure of the heavy diesel feeding pump 32 and the supplementary feed pump 52 is 3.5 MPag.

[0054] Specifically, the reduction catalyst system further includes a merging line 71 .

[0055] One end of the confluence line 71 is connected to the second end of the feeding line 31 and the second end of the supplementary feeding line 51 , and the other end of the confluence line 71 is connected to the liquid inlet. A first shut-off valve 72 and multiple one-way valves 73 are provided on the confluence line 71 .

[0056] Such an arrangement facilitates the transportation of the heavy fuel oil in the feeding pipeline 31 and the supplementary feeding pipeline 51 into the reduction reactor 10 , and also facilitates the assembly of the feeding pipeline 31 and the supplementary feeding pipeline 51 .

[0057] In the prior art, if the valve in the wall of the reduction reactor 10 leaks, the 3.1 MPa hydrogen and carbon monoxide gases within the reduction reactor 10 may leak into the storage tank 20, which can easily cause serious accidents such as fire, poisoning, or explosion. However, in the present application, the manifold 71 is provided with a first shut-off valve 72 and multiple one-way valves 73. This ensures one-way flow in the manifold 71. Even if multiple one-way valves 73 leak, the operator can disconnect the manifold 71 by closing the first shut-off valve 72. Therefore, this configuration ensures the safety of personnel and equipment.

[0058] Furthermore, a second shut-off valve 33 is provided on the feeding pipeline 31 , and a third shut-off valve 53 is provided on the feeding pipeline 51 .

[0059] With this arrangement, when the feeding pump 32 stops running, the second shut-off valve 33 is closed to prevent the heavy fuel in the feeding pipeline 31 from flowing, wherein the second shut-off valve 33 is located downstream of the feeding pump 32 .

[0060] When the feeding pump 52 stops running, the third shut-off valve 53 is closed to prevent the heavy fuel oil in the feeding pipeline 51 from flowing. The third shut-off valve 53 is located downstream of the feeding pump 52 .

[0061] Specifically, the feed line 51 is provided with a heater 54 and a control valve 55. The control valve 55 is used to control the flow rate of the feed line 51. Since the feed pump 52 adds heavy fuel oil to the reduction reactor 10 during the reduction process, the heater 54 needs to be connected downstream of the third shut-off valve 53 to increase the temperature of the heavy fuel oil and ensure the normal progress of the reduction reaction.

[0062] The second pressure relief pipeline 61 is connected to the makeup pipeline 51 upstream of the heater 54.

[0063] Further, the makeup pipeline 51 is provided with a second pressure gauge 56. In this way, the pressure of the makeup pipeline 51 can be observed to see if it meets the requirements, facilitating the troubleshooting of the staff.

[0064] In the present application, the first pressure gauge 34 and the second pressure gauge 56 can alarm. When the valve such as the one-way valve 73 fails, the staff can obtain information from the alarm of the first pressure gauge 34 and the second pressure gauge 56, and the staff can take prompt measures to avoid major accidents.

[0065] Specifically, the reaction cavity is provided with a heating structure to heat the reduction reaction of the catalyst. In this way, the heavy oil can be heated conveniently and easily.

[0066] The heating structure is a coil structure for circulating heated steam. In this way, the heating efficiency of the heavy oil can be ensured, and the structure of the heating structure is simple, the steam is used for heating, and the heating energy consumption can be reduced to save costs.

[0067] Further, the reduction catalyst system further comprises a control system.

[0068] The control system is electrically connected with the first shut-off valve 72, the second shut-off valve 33, and the third shut-off valve 53. The control system can synchronously control the opening and closing of the first shut-off valve 72 and the second shut-off valve 33, and the control system can synchronously control the opening and closing of the first shut-off valve 72 and the third shut-off valve 53.

[0069] In this way, the first shut-off valve 72 and the second shut-off valve 33 can be interlocked. When the feed pump 32 is shut down, the first shut-off valve 72 and the second shut-off valve 33 can be closed in time to avoid the flow of the heavy oil. Meanwhile, the first shut-off valve 72 and the third shut-off valve 53 can be interlocked. When the makeup pump 52 is shut down, the first shut-off valve 72 and the third shut-off valve 53 can be closed in time to avoid the flow of the heavy oil.

[0070] In the present application, the feed pump 32 and the makeup pump 52 are operated alternately.

[0071] Specifically, the storage tank 20 is provided with a vent pipe. One end of the vent pipe is in communication with the liquid storage cavity, and the other end of the vent pipe is used to communicate with the outside. In this way, the pressure in the storage tank 20 can be balanced to ensure the normal transportation and backflow of the heavy oil.

[0072] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0073] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments are not intended to limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportion relationship for the convenience of description. The technology, methods and devices known to those skilled in the related art can not be discussed in detail, but should be considered as part of the specification under appropriate circumstances. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so further discussion is not needed in subsequent drawings once an item is defined in one drawing.

[0074] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0075] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0076] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A reduction catalyst system, characterized in that: The reduction catalyst system comprises: A reduction reactor (10), the reduction reactor (10) comprising a reaction chamber and a liquid inlet that are interconnected, the reaction chamber being used to place a catalyst; A storage tank (20), the storage tank (20) having a liquid outlet and a liquid storage cavity that are interconnected, the liquid storage cavity being used to store heavy firewood; a feeding pipeline (31), the feeding pipeline (31) having a first end and a second end arranged opposite to each other, the first end of the feeding pipeline (31) being in communication with the liquid outlet, the second end of the feeding pipeline (31) being in communication with the liquid inlet, and a feeding pump (32) being provided on the feeding pipeline (31); A first pressure relief pipeline (41), one end of which is connected to the feeding pipeline (31), and the other end of which is connected to the oil tank, is provided with a first pressure relief valve (42).

2. The reduction catalyst system according to claim 1, characterized in that The storage tank (20) has a reflux port, which is in communication with the liquid storage chamber. The reduction catalyst system further comprises: a feeding pipeline (51), the feeding pipeline (51) having a first end and a second end arranged opposite to each other, the first end of the feeding pipeline (51) being in communication with the liquid outlet, the second end of the feeding pipeline (51) being in communication with the liquid inlet, and a feeding pump (52) being provided on the feeding pipeline (51); A second pressure relief pipeline (61), one end of the second pressure relief pipeline (61) is connected to the feeding pipeline (51), the other end of the second pressure relief pipeline (61) is connected to the reflux port, and a second pressure relief valve (62) is provided on the second pressure relief pipeline (61).

3. The reduction catalyst system according to claim 2, characterized in that The reduction catalyst system further comprises: A confluence line (71), one end of which is in communication with the second end of the feeding line (31) and the second end of the feeding line (51), and the other end of which is in communication with the liquid inlet. A first shut-off valve (72) and a plurality of one-way valves (73) are provided on the confluence line (71).

4. The reduction catalyst system according to claim 3, characterized in that The feeding pipeline (31) is provided with a second shut-off valve (33), and the feeding pipeline (51) is provided with a third shut-off valve (53).

5. The reduction catalyst system according to claim 2, characterized in that: The feeding pipeline (51) is provided with a heater (54) and a control valve (55), and the control valve (55) is used to control the flow of the feeding pipeline (51).

6. The reduction catalyst system according to claim 2, characterized in that The feeding pipeline (31) is provided with a first pressure gauge (34), and the feeding pipeline (51) is provided with a second pressure gauge (56).

7. The reduction catalyst system according to claim 5, characterized in that A heating structure is provided in the reaction chamber to heat the reduction reaction of the catalyst.

8. The reduction catalyst system according to claim 7, characterized in that The heating structure is a coil structure, and the coil structure is used for circulating heating steam.

9. The reduction catalyst system according to claim 4, characterized in that The reduction catalyst system further comprises: A control system is provided, wherein the control system is electrically connected to the first shut-off valve (72), the second shut-off valve (33) and the third shut-off valve (53), and the control system is capable of synchronously controlling the switching of the first shut-off valve (72) and the second shut-off valve (33), and the control system is capable of synchronously controlling the switching of the first shut-off valve (72) and the third shut-off valve (53).

10. The reduction catalyst system according to claim 1, characterized in that The storage tank (20) is provided with a vent pipe, one end of which is in communication with the liquid storage cavity, and the other end of which is in communication with the outside world.

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