Steam reinjection device and system
The steam supplementing system addresses the winter steam shortage in carbon dioxide compressors by adjusting steam parameters, ensuring efficient operation and reducing energy waste.
Patent Information
- Application Number
- CN202422517323.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-10-17
AI Technical Summary
In winter, the reduced steam supply to carbon dioxide compressors due to diversion for urea solution heating in urea pool reactors results in insufficient steam pressure and temperature, affecting the efficient operation of carbon dioxide compressors.
A steam supplementing system comprising a steam supply device, carbon dioxide compressor, steam injection line, control valve assembly, and steam supplement line, which adjusts steam temperature and pressure to meet compressor requirements through adjustable valves.
The system ensures adequate steam supply to carbon dioxide compressors, reducing waste and enhancing energy efficiency by precise control of steam parameters.
Smart Images
Figure CN223105836U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of steam recovery, and particularly to a steam injection device and system. Background Art
[0002] Part of the low-pressure steam generated at the condensation end of the urea pool reactor is used to drive the carbon dioxide compressor turbine unit. Under normal circumstances, this part of the steam can meet the operating requirements of the carbon dioxide compressor and ensure its efficient operation.
[0003] However, in winter, in order to prevent the crystallization of urea solution and ensure the normal operation of urea production equipment, more steam is required for heat tracing. Therefore, part of the steam originally used to drive the carbon dioxide compressor is diverted for heat tracing, resulting in a reduction in the amount of steam entering the carbon dioxide compressor unit and being unable to meet the original design requirements. Summary of the Utility Model
[0004] To solve the above technical problems, an embodiment of the present disclosure provides a steam injection device, including: a steam supply device that provides first steam with a first preset temperature and a first preset pressure; a carbon dioxide unit; an injection steam pipeline whose output end is connected to the carbon dioxide unit and is used to transport second steam with a second preset temperature and a second preset pressure to the carbon dioxide unit; a control valve group that includes a stop valve, and the stop valve has different opening states to adjust the first preset temperature of the first steam to be higher or lower than the second preset temperature and / or adjust the first preset pressure of the first steam to be higher or lower than the second preset pressure; and a supplementary steam pipeline whose input end is connected to the steam supply device and the other end is connected to the injection steam pipeline through the control valve group to transport the first steam passing through the control valve group to the injection steam pipeline.
[0005] In some embodiments, the control valve group includes: a connecting pipeline whose one end is connected to the injection steam pipeline and the other end is connected to the supplementary steam pipeline; wherein, the stop valve includes a first stop valve and a second stop valve, the first stop valve is arranged at one end of the connecting pipeline close to the supplementary steam pipeline, and the second stop valve is arranged at one end of the connecting pipeline close to the injection steam pipeline.
[0006] In some embodiments, the control valve group further includes: a drain valve, and two drain valves are arranged at intervals on the connecting pipeline and are located between the first stop valve and the second stop valve.
[0007] In some embodiments, it further includes: a pressure gauge arranged on the connecting pipeline and located between the first stop valve and the second stop valve.
[0008] In some embodiments, it further includes: a temperature detection component arranged on the supplementary steam pipeline and used to detect the temperature of the first steam; a control component that controls the opening of the first stop valve based on the temperature value detected by the temperature detection component.
[0009] In some embodiments, the steam supplementary pipeline is parallel to the steam injection pipeline in the extending direction, and a preset distance is reserved between the steam supplementary pipeline and the steam injection pipeline.
[0010] In some embodiments, it further includes: a check valve disposed on the connecting pipeline.
[0011] In some embodiments, it further includes: a deflector plate, and a plurality of deflector plates with spiral channels are arranged at intervals in the inner cavity of the steam supplementary pipeline.
[0012] A system includes: the steam supplementary device as described above.
[0013] In some embodiments, the number of the steam supplementary pipelines is multiple. The input end of each steam supplementary pipeline is connected to the steam supply device, and the other end is connected to the steam injection pipeline through a control valve group to deliver the first steam passing through the control valve group to the steam injection pipeline.
[0014] Through the above technical solutions, the steam supplementary injection device and system provided by the present disclosure include a steam supply device, a carbon dioxide unit, a steam injection pipeline, a control valve group, and a steam supplementary pipeline. In winter, the steam generated by the steam supply device is injected into the steam injection pipeline through the steam supplementary pipeline. The opening degree of the stop valve of the control valve group can adjust the first steam with a first preset temperature and a first preset pressure in the steam supplementary pipeline to be higher or lower than a second preset temperature and a second preset pressure to meet the requirements of the carbon dioxide unit. The steam supplementary injection device injects the steam generated by the steam supply device into the steam injection pipeline through the steam supplementary pipeline to supplement the missing steam volume, reduces unnecessary steam waste through precise control, and improves the energy utilization efficiency. Description of the Drawings
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0016] Figure 1 It is a schematic structural diagram of a steam supplementary injection device disclosed in an embodiment of the present disclosure;
[0017] Figure 2 It is a partial structural sectional view of the steam supplementary pipeline disclosed in an embodiment of the present disclosure.
[0018] Description of the Reference Numerals:
[0019] 1. Steam supply device; 2. Carbon dioxide unit; 3. Steam injection pipeline; 4. Control valve group; 41. First stop valve; 42. Second stop valve; 43. Connecting pipeline; 44. Drain valve; 45. Check valve; 5. Supplementary steam pipeline; 6. Pressure gauge; 7. Temperature detector; 8. Deflector. Detailed implementation manners
[0020] The following further describes the implementation manners of the present disclosure in detail with reference to the accompanying drawings and embodiments. The detailed descriptions and drawings of the following embodiments are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.
[0021] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values described in these embodiments should be construed as merely exemplary, rather than as limitations.
[0022] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present disclosure. When the absolute position of the described object changes, the relative position relationship may also change accordingly.
[0023] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. The terms "including" or "comprising" and the like mean that the elements before the term cover the elements listed after the term, and do not exclude the possibility of also covering other elements.
[0024] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.
[0025] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.
[0026] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.
[0027] The inventors found that saturated low-pressure steam is generated at the condensation end of the urea pool reactor, with a pressure of 0.4 MPa (G) and a temperature of 145 °C. Subsequently, it is sent to various users through a low-pressure steam drum, and a part of it is used to drive the steam turbine of the carbon dioxide compressor, with a designed flow rate of 17.3 t / h. However, in winter, due to the increased consumption of urea heat tracing, the actual steam injection flow rate into the carbon dioxide compressor steam turbine drops to 15 t / h, which is lower than the designed flow rate.
[0028] Embodiment 1
[0029] Embodiment 1 of the present disclosure provides a steam supplementary injection device, including: a steam supply device 1 that provides first steam with a first preset temperature and a first preset pressure; a carbon dioxide unit 2; an injection steam pipeline 3, whose output end is connected to the carbon dioxide unit 2 and is used to transport second steam with a second preset temperature and a second preset pressure to the carbon dioxide unit 2; a control valve group 4, which includes a stop valve, and the stop valve has different opening states to adjust the first preset temperature of the first steam to be higher than or lower than the second preset temperature and / or adjust the first preset pressure of the first steam to be higher than or lower than the second preset pressure; and a supplementary steam pipeline 5, whose input end is connected to the steam supply device 1, and the other end is connected to the injection steam pipeline 3 through the control valve group 4 to transport the first steam passing through the control valve group 4 to the injection steam pipeline 3.
[0030] Specifically, as Figure 1As shown in the figure, the steam supply device 1 is used to generate the first steam with a first preset temperature and a first preset pressure. The steam supply device 1 can be any device that generates steam, such as: it can be a liquid ammonia synthesis device. In addition, the steam generated by the steam supply device 1 is reasonably utilized, and the steam of the steam supply device 1 is injected into the steam injection pipeline 3 to be introduced into the carbon dioxide unit 2, so that the steam generated by the steam supply device 1 can save energy. The carbon dioxide unit 2 is the target device and needs to receive steam with a specific temperature and pressure to operate normally. The steam injection pipeline 3 is the main steam transmission pipeline for delivering the second preset steam to the carbon dioxide unit 2, ensuring that the second steam with a second preset temperature and a second preset pressure is delivered to the carbon dioxide unit 2. The second steam in the make-up steam pipeline can come from equipment such as a urea pool reactor. The make-up steam pipeline 5 connects the steam supply device 1 and the steam injection pipeline 3, and the first steam is delivered to the steam injection pipeline 3 through the control valve group 4. Here, the lengths of the steam injection pipeline 3 and the make-up steam pipeline 5 are not specifically limited, and the steam injection pipeline 3 and the make-up steam pipeline 5 can be square pipes or circular pipes, etc. The control valve group 4 is connected between the make-up steam pipeline 5 and the steam injection pipeline 3, and the control valve group 4 includes at least one globe valve. The globe valve has different opening states, and the opening of the globe valve can be adjusted to adjust the increase or decrease of the first temperature and the increase or decrease of the first preset pressure of the first steam.
[0031] The steam make-up injection device and system provided by the present disclosure include a steam supply device 1, a carbon dioxide unit 2, a steam injection pipeline 3, a control valve group 4, and a make-up steam pipeline 5. In winter, the steam generated by the steam supply device 1 is injected into the steam injection pipeline 3 through the make-up steam pipeline 5, and the first steam with a first preset temperature and a first preset pressure in the make-up steam pipeline 5 can be adjusted to be higher or lower than the second preset temperature and the second preset pressure through the opening of the globe valve of the control valve group 4 to meet the requirements of the carbon dioxide unit 2. The steam make-up injection device injects the steam generated by the steam supply device 1 into the steam injection pipeline 3 through the make-up steam pipeline 5 to supplement the missing steam volume, reduces unnecessary steam waste through precise control, improves energy utilization efficiency, and can also reduce the main steam consumption of the carbon dioxide compressor unit.
[0032] In some embodiments, the control valve group 4 includes: a connecting pipeline 43, one end of which is connected to the steam injection pipeline 3 and the other end is connected to the make-up steam pipeline 5; wherein, the globe valve includes a first globe valve 41 and a second globe valve 42. The first globe valve 41 is arranged at one end of the connecting pipeline 43 close to the make-up steam pipeline 5, and the second globe valve 42 is arranged at one end of the connecting pipeline 43 close to the steam injection pipeline 3.
[0033] Specifically, such as Figure 1As shown, the control valve group 4 includes a connecting pipeline 43 and two globe valves. One end of the connecting pipeline 43 is connected to the steam injection pipeline 3, and the other end is connected to the supplementary steam pipeline 5. When a large amount of steam needs to be transmitted through the connecting pipeline 43, in order to reduce the flow resistance and ensure the smooth transmission of steam, the inner diameter of the connecting pipeline 43 can be larger than that of the steam injection pipeline 3 or larger than that of the supplementary steam pipeline 5. In order to reduce the pressure loss while maintaining sufficient flow transmission capacity, the inner diameter of the connecting pipeline 43 can also be smaller than that of the steam injection pipeline 3 or larger than that of the supplementary steam pipeline 5. The globe valves are divided into a first globe valve 41 and a second globe valve 42: The first globe valve 41 is arranged at one end of the connecting pipeline 43 close to the supplementary steam pipeline 5 to control the steam flow rate entering the connecting pipeline 43 from the supplementary steam pipeline 5; The second globe valve 42 is arranged at one end of the connecting pipeline 43 close to the steam injection pipeline 3 to control the steam flow rate entering the steam injection pipeline 3 from the connecting pipeline 43. This design of double globe valves enables the system to more precisely adjust the supplementary steam volume and ensure that the steam parameters entering the steam injection pipeline 3 meet the requirements.
[0034] In some embodiments, the control valve group 4 further includes: a drain valve 44, and two drain valves 44 are spaced apart on the connecting pipeline 43 and are located between the first globe valve 41 and the second globe valve 42.
[0035] Specifically, as Figure 1 shown, the control valve group 4 further includes two drain valves 44, and both of the two drain valves 44 are arranged on the connecting pipeline 43 and are located between the first globe valve 41 and the second globe valve 42. One of the drain valves 44 is close to the first globe valve 41, and the other drain valve 44 is close to the second globe valve 42. When using the supplementary steam pipeline 5 for supplementary steam, in order to ensure that the pipeline is gradually heated and pressurized to avoid damage to the pipeline caused by thermal stress due to temperature difference, the supplementary steam pipeline 5 can be preheated. First, open the two drain valves 44 located between the first globe valve 41 and the second globe valve 42 on the connecting pipeline 43. This is to drain the condensate in the connecting pipeline 43 and prevent the formation of water hammer effect by the condensate during the pipeline warming process, which may damage the pipeline or equipment. Next, slightly open the first globe valve 41, that is, the globe valve on the side close to the supplementary steam pipeline 5, to allow a small amount of steam to enter the connecting pipeline 43, and let the steam gradually heat the pipeline to avoid excessive thermal stress in the connecting pipeline 43 due to sudden heating.
[0036] In some embodiments, it further includes: a pressure gauge 6, which is arranged on the connecting pipeline 43 and is located between the first globe valve 41 and the second globe valve 42.
[0037] Specifically, as Figure 1As shown, the device further includes a pressure gauge 6, which can be arranged in the connecting pipeline 43, between the first stop valve 41 and the second stop valve 42. When the first stop valve 41 is closed and the second stop valve 42 is opened, the pressure gauge 6 can measure the pressure of the steam injection pipeline 3. When the first stop valve 41 is opened and the second stop valve 42 is closed, the pressure gauge 6 can measure the pressure of the supplementary steam pipeline 5. After the connecting pipeline is preheated, the second stop valve 42 remains closed. By observing the pressure gauge 6 and adjusting the opening degree of the first stop valve 41, the pressure in the supplementary steam pipeline 5 can be observed to gradually rise or fall, so that the first pressure in the supplementary steam pipeline 5 reaches the preset pressure, and then the second stop valve 42 is opened to inject the first steam into the steam injection pipeline 3.
[0038] In some embodiments, it further includes: a temperature detection component 7 arranged in the supplementary steam pipeline 5 for detecting the temperature of the first steam; a control component for controlling the opening degree of the first stop valve 41 based on the temperature value detected by the temperature detection component 7.
[0039] Specifically, as Figure 1 shown, the temperature detection component 7 is arranged on the supplementary steam pipeline 5 for detecting the temperature of the first steam in real time. The temperature detection component 7 can be a thermocouple, a thermal resistor or other types of temperature sensors for accurately measuring the steam temperature. The temperature detection component 7 can feedback the temperature value of the first steam to the control component in real time to ensure the accuracy and real-time of the data. The control component automatically adjusts the opening degree of the first stop valve 41 based on the temperature value detected by the temperature detection component 7. For example, when the temperature of the first steam is lower than the preset temperature, the control component controls the opening degree of the first stop valve 41 to become smaller, so that the steam pressure in the supplementary steam pipeline 5 increases, and the temperature of the first steam rises. Through the combination of the temperature detection component 7 and the control component, the system can automatically adjust the steam temperature and reduce the need for manual intervention.
[0040] In some embodiments, the supplementary steam pipeline 5 is parallel to the extending direction of the steam injection pipeline 3, and a preset distance is left between the supplementary steam pipeline 5 and the steam injection pipeline 3.
[0041] Specifically, as Figure 1 shown, the supplementary steam pipeline 5 and the steam injection pipeline 3 extend along the same axis direction, but maintain a certain parallel distance from each other. This parallel layout makes the two pipelines independent of each other in space and reduces the possibility of cross interference. Keeping a certain distance can reduce the heat transfer between the two pipelines and reduce the impact of a failure of one pipeline on the other pipeline.
[0042] In some embodiments, it further includes: a check valve 45 arranged in the connecting pipeline 43.
[0043] Specifically, as Figure 1As shown, the steam supplementary injection device further includes a check valve 45, and the check valve 45 is disposed on the connecting pipeline 43. The check valve 45 can be located between the first stop valve 41 and the second stop valve 42 to ensure that the steam entering the connecting pipeline 43 from the steam supply pipeline 5 can only flow towards the steam injection pipeline 3 and will not flow reversely.
[0044] In some embodiments, it further includes: a deflector 8, and a plurality of deflectors 8 having spiral channels are arranged at intervals in the inner cavity of the steam supply pipeline 5.
[0045] Specifically, as Figure 2 shown, in order to prevent the condensate from flowing downward along the pipeline wall and reduce the accumulation of condensate in the pipeline, and improve the purity of the steam. A plurality of deflectors 8 having spiral channels are arranged in the steam supply pipeline 5, and a plurality of deflectors 8 are arranged at intervals in the inner cavity of the steam supply pipeline 5. The number of the deflectors 8 is not specifically limited here. The deflector 8 can also be composed of a plurality of spiral blades, and these blades form a spiral channel. The blades can be planar or curved, and are usually evenly distributed along the inner wall of the pipeline. The deflector 8 can be composed of a plurality of spiral protrusions or grooves on the inner wall of the pipeline, forming a plurality of parallel spiral paths.
[0046] Embodiment 2
[0047] A steam supplementary injection system includes a steam supplementary device.
[0048] This system includes a steam supplementary device. The steam supplementary device includes a steam supply device 1, a carbon dioxide unit 2, a steam injection pipeline 3, a control valve group 4, and a steam supply pipeline 5. In winter, the steam generated by the steam supply device 1 is injected into the steam injection pipeline 3 through the steam supply pipeline 5. By adjusting the opening degree of the stop valve of the control valve group 4, the first steam with a first preset temperature and a first preset pressure in the steam supply pipeline 5 can be adjusted to be higher or lower than a second preset temperature and a second preset pressure to meet the requirements of the carbon dioxide unit 2. This system injects the steam generated by the steam supply device 1 into the steam injection pipeline 3 through the steam supply pipeline 5 to supplement the missing steam volume, and reduces unnecessary steam waste through precise control, thereby improving the energy utilization efficiency.
[0049] In some embodiments, the number of the steam supply pipelines 5 is multiple. The input end of each steam supply pipeline 5 is connected to the steam supply device 1, and the other end is connected to the steam injection pipeline 3 through the control valve group 4 to convey the first steam passing through the control valve group 4 to the steam injection pipeline 3.
[0050] Specifically, the steam supply pipeline 5 in the system may include multiple steam supply pipelines 5. The input end of each steam supply pipeline 5 is connected to the steam supply device 1, and the other end is connected to the steam injection pipeline 3 through the control valve group 4 to deliver the first steam passing through the control valve group 4 to the steam injection pipeline 3. The multiple steam supply pipelines 5 can provide redundant functions. When a problem occurs in a certain pipeline, the other pipelines can continue to supply steam, improving the reliability of the system. By sharing the steam delivery task among multiple pipelines, the load of each pipeline can be balanced, preventing a single pipeline from being overloaded. Each steam supply pipeline 5 independently adjusts the pressure and flow rate of the steam through its respective control valve group 4 and can be flexibly adjusted according to actual needs. Through the design of such multiple steam supply pipelines 5, the steam supplementary injection system can not only improve the reliability and flexibility of the system, but also better adapt to the steam demand under different working conditions.
[0051] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.
[0052] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or partial technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.
Claims
1. A steam supplementary injection device, characterized in that, Including: A steam supply device (1) that provides first steam with a first preset temperature and a first preset pressure; A carbon dioxide unit (2); An injection steam pipeline (3) whose output end is connected to the carbon dioxide unit (2) and is used to convey second steam with a second preset temperature and a second preset pressure to the carbon dioxide unit (2); A control valve group (4) which includes a globe valve, and the globe valve has different opening states to adjust the first preset temperature of the first steam to be higher than or lower than the second preset temperature and / or adjust the first preset pressure of the first steam to be higher than or lower than the second preset pressure; A supplementary steam pipeline (5) whose input end is connected to the steam supply device (1), and the other end is connected to the injection steam pipeline (3) through the control valve group (4) to convey the first steam passing through the control valve group (4) to the injection steam pipeline (3).
2. The steam injection device according to claim 1, characterized in that, The control valve group (4) includes: A connecting pipeline (43) whose one end is connected to the injection steam pipeline (3) and the other end is connected to the supplementary steam pipeline (5); Wherein, the globe valve includes a first globe valve (41) and a second globe valve (42), the first globe valve (41) is arranged at one end of the connecting pipeline (43) close to the supplementary steam pipeline (5), and the second globe valve (42) is arranged at one end of the connecting pipeline (43) close to the injection steam pipeline (3).
3. The steam injection device according to claim 2, wherein The control valve group (4) further includes: Drain valves (44), and two drain valves (44) are arranged at intervals on the connecting pipeline (43) and are located between the first globe valve (41) and the second globe valve (42).
4. The steam re-injection device according to claim 2, characterized in that, It further includes: A pressure gauge (6) which is arranged on the connecting pipeline (43) and is located between the first globe valve (41) and the second globe valve (42).
5. The steam injection device according to claim 2, wherein It further includes: A temperature detection component (7) which is arranged on the supplementary steam pipeline (5) and is used to detect the temperature of the first steam; A control component that controls the opening degree of the first globe valve (41) based on the temperature value detected by the temperature detection component (7).
6. The steam supplementary injection device according to claim 1, wherein The supplementary steam pipeline (5) is parallel to the extending direction of the injection steam pipeline (3), and a preset distance is left between the supplementary steam pipeline (5) and the injection steam pipeline (3).
7. The steam injection device according to claim 2, characterized in that, It further includes: A check valve (45) which is arranged on the connecting pipeline (43).
8. The steam injection device according to claim 1, wherein It further includes: Flow guiding plates (8), and multiple flow guiding plates (8) with spiral channels are arranged at intervals in the inner cavity of the supplementary steam pipeline (5).
9. A steam supplementary injection system, characterized in that, Including: The steam supplementary device according to any one of claims 1 - 8.
10. The steam supplementary injection system according to claim 9, wherein The number of the supplementary steam pipelines (5) is multiple, the input end of each supplementary steam pipeline (5) is connected to the steam supply device (1), and the other end is connected to the injection steam pipeline (3) through the control valve group (4) to convey the first steam passing through the control valve group (4) to the injection steam pipeline (3).