Ignition starting device for steam generator set and test method thereof

Abstract

The present application relates to the technical fields of engine high-altitude simulation test, and discloses a kind of ignition starting device and test method for steam generator group, and the ignition starting device for steam generator group includes combustion chamber assembly, liquid inlet injection assembly and connecting assembly;Liquid inlet injection assembly includes gas oxygen inlet connector nozzle, alcohol inlet connector nozzle and outer ring structure, outer ring structure has gas oxygen channel and alcohol channel, gas oxygen inlet connector nozzle is communicated with gas oxygen channel, alcohol inlet connector nozzle is connected along the radial direction of outer ring structure and is communicated with alcohol channel, alcohol is sprayed from one end of alcohol channel to form alcohol injection liquid film, the included angle between alcohol injection liquid film and the axis of combustion chamber body is α, satisfy 60°≤α≤75°.The present application limits the included angle between alcohol injection liquid film and the axis of combustion chamber body, while ensuring the smooth formation of high-temperature combustion gas, to avoid the problem of ablation of the inner wall of the combustion chamber body, and to realize the stable start of the steam generator group.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engine high-altitude simulation test, and particularly relates to a kind of ignition starting device for steam generator set and its test method. BACKGROUND

[0002] The steam generator is designed based on the working principle of liquid rocket engine thrust chamber, and generates a certain flow of high-temperature and high-pressure steam by burning medium. It is the core equipment for supplying injection medium in various types of engine high-altitude simulation ground tests at home and abroad, and can provide a vacuum working environment similar to the actual flight conditions in the high-altitude chamber, thereby verifying the performance and reliability of the engine. The steam generator is usually ignited by an ignition starting device.

[0003] In the prior art, there are various fuel medium ignition starting devices. Among them, the liquid oxygen / alcohol ignition starting device belongs to non-self-igniting propellant, which needs to be ignited by an ignition device. In order to realize the use convenience and reliability of repeated starting of the ignition starting device for the steam generator, a gaseous oxygen / alcohol torch type ignition starting device is selected. However, when the gaseous oxygen / alcohol ignition starting device is applied to the steam generator, ignition delay and inner wall ablation of the combustion chamber may occur. SUMMARY

[0004] Therefore, the present application provides an ignition starting device for steam generator set and its test method to solve the problem of ignition delay and inner wall ablation of the combustion chamber in the prior art ignition starting device applied to the steam generator.

[0005] In the first aspect, the present application provides an ignition starting device for steam generator set, which comprises a combustion chamber assembly, a liquid inlet injection assembly and a connecting assembly. The combustion chamber assembly comprises a combustion chamber body and a spark plug base, and the spark plug base is connected to the combustion chamber body at a predetermined angle. The liquid inlet injection assembly comprises a gaseous oxygen inlet connector, an alcohol inlet connector and an outer ring structure. The outer ring structure is connected to the combustion chamber body and coaxially arranged. The outer ring structure has a gaseous oxygen channel and an alcohol channel. The gaseous oxygen inlet connector is in communication with the gaseous oxygen channel, and the gaseous oxygen channel is in communication with the combustion chamber body. The gaseous oxygen channel forms a gaseous oxygen injection hole at one end close to the combustion chamber body. The gaseous oxygen inlet connector is arranged in parallel with the axis of the combustion chamber body. The alcohol inlet connector is connected to the alcohol channel along the radial direction of the outer ring structure. The alcohol channel is in communication with the combustion chamber body. The alcohol channel forms an alcohol injection hole at one end close to the combustion chamber body. Alcohol is sprayed from the alcohol injection hole to form an alcohol injection liquid film. The included angle between the alcohol injection liquid film and the axis of the combustion chamber body is α, which satisfies 60°≤α≤75°. The connecting assembly is connected to one end of the combustion chamber body away from the liquid inlet injection assembly.

[0006] Beneficial effects: By limiting the angle between the alcohol injection film and the axis of the combustion chamber body, the high temperature gas is smoothly formed, the wall is heat protected, the ablation problem of the inner wall of the combustion chamber body is avoided, and the synchronous stable start of the steam generator group is realized. The heat protection is simple and reliable, and no additional cooling medium and cooling channel are needed.

[0007] In an optional embodiment, the diameter of the gas-oxygen injection hole is D1, and 0.3mm≤D1≤2mm is satisfied; and / or, the diameter of the alcohol injection hole is D2, and 0.3mm≤D2≤2mm is satisfied.

[0008] Beneficial effects: For different steam generator injection flow requirements, the hole diameter can be flexibly selected to improve the applicability of the overall device.

[0009] In an optional embodiment, the alcohol injection hole is a rotational flow injection hole, the gas-oxygen injection hole has a retracted length L, and 6mm≤L≤12mm is satisfied; or, the alcohol injection hole is a straight flow injection hole, the spark plug base has an ignition end face, and the alcohol injection hole is set away from the ignition end face.

[0010] Beneficial effects: The alcohol injection hole is a rotational flow injection hole, which expands the contact area of alcohol and gas-oxygen by forming a spiral gas flow. By controlling the retracted length of the gas-oxygen injection hole, direct impact of gas-oxygen on the wall is avoided to destroy the liquid film protection layer, and the mixing path is prolonged to reduce the ignition delay.

[0011] In an optional embodiment, the liquid injection assembly further comprises an alcohol pre-injection compression pipe nozzle connected along the radial direction of the outer ring structure and in communication with the alcohol channel, and the alcohol pre-injection compression pipe nozzle is set at a predetermined angle with the alcohol inlet pipe nozzle; and / or, the combustion chamber assembly further comprises a combustion chamber compression pipe nozzle in communication with the combustion chamber body, and the combustion chamber compression pipe nozzle is set on the side of the spark plug base close to the liquid injection assembly.

[0012] Beneficial effects: By setting the alcohol pre-injection compression pipe nozzle and the combustion chamber compression pipe nozzle, the pressure in each component of the device is monitored by an external test system, the pressure adjustment accuracy is improved, and the overall ignition and combustion performance of the device is optimized.

[0013] In an optional embodiment, the connecting assembly comprises a throat structure and a connecting flange, the throat structure and the connecting flange are integrally formed, the throat structure is connected with the combustion chamber assembly, and the connecting flange is suitable for connecting with the steam generator group.

[0014] Beneficial effects: throat structure and connecting flange integral molding overall processing, enhance the structural reliability, eliminate the split type connection gap, improve the overall sealing of the device.

[0015] In a second aspect, the application further provides a test method of the ignition starting device for the steam generator set, which is used for installing the ignition starting device for the steam generator set on the steam generator set and testing, comprising the following steps: step S1, installing the ignition starting device for the steam generator set on the steam generator set; step S2, testing the body state of the ignition starting device for the steam generator set; step S3, jointly debugging the ignition starting device for the steam generator set and the steam generator set.

[0016] In an alternative embodiment, the steam generator set comprises a combustion mixing chamber, a guide tube and an injection disc, the combustion mixing chamber has a generator combustion chamber inside, the injection disc is connected with the combustion mixing chamber, two ends of the guide tube are respectively communicated with the generator combustion chamber and the connecting assembly, and part of the guide tube extends into the generator combustion chamber.

[0017] In an alternative embodiment, in the step S1, comprising: step S11, configuring one ignition starting device for the steam generator set for each combustion mixing chamber; step S12, selecting the installation position of the guide tube; step S13, when selecting to install the guide tube at the head of the combustion mixing chamber, welding and fixing the guide tube with the injection disc, and the combustion mixing chamber further has a working medium collecting cavity inside, and the guide tube is arranged in isolation from the working medium collecting cavity; when selecting to install the guide tube at the body of the combustion mixing chamber, connecting the guide tube with the combustion mixing chamber; step S14, connecting the guide tube with the connecting assembly.

[0018] In an alternative embodiment, in the step S2, comprising: step S21, connecting the gas-oxygen inlet connecting pipe and the alcohol inlet connecting pipe with an external test system; step S22, supplying gas-oxygen and alcohol to the ignition starting device for the steam generator set, wherein the gas-oxygen supply pressure is P1, satisfying 4.5MPa≤P1≤5.7MPa, and the alcohol supply pressure is P2, satisfying 2.9MPa≤P2≤3.4MPa; step S23, setting the spark plug in the combustion chamber assembly and starting ignition; step S24, opening the system nitrogen blowing after the ignition is finished, and the nitrogen blowing pressure is P3, satisfying 3MPa≤P3≤5MPa, and the nitrogen enters the combustion chamber assembly through the gas-oxygen channel and the alcohol channel and flows out through the connecting assembly.

[0019] Beneficial effect: After the ignition is over, the working medium in the liquid injection assembly is blown out by nitrogen, avoiding the residue of the working medium, prolonging the service life of the device, and ensuring the smooth passage at the next start.

[0020] In an alternative embodiment, in the step S3, comprising: step S31, starting the ignition starting device for the steam generator group first; step S32, when the ignition is successful, the steam generator group starts to inject the working medium; when the ignition work is abnormal, the ignition starting device for the steam generator group and the steam generator group are shut down urgently.

[0021] Beneficial effect: The ignition starting device for the steam generator group is started first, and then the working medium is introduced, avoiding the working medium entering the unignited combustion chamber to cause flameout, and ensuring the stable operation of the system. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0023] Figure 1 The structure diagram of the ignition starting device for the steam generator group in the embodiment of the present application;

[0024] Figure 2 The structure diagram of the liquid injection assembly in the embodiment of the present application;

[0025] Figure 3 The structure diagram of the steam generator group in the embodiment of the present application;

[0026] Figure 4 The pressure curve of the ignition starting device for the steam generator group in the embodiment of the present application;

[0027] Figure 5 The pressure curve of the generator combustion chamber of the steam generator group in the embodiment of the present application.

[0028] Explanation of reference signs:

[0029] 10, combustion chamber assembly; 11, combustion chamber body; 12, spark plug base; 13, combustion chamber compression fitting nozzle; 20, liquid injection assembly; 21, gas oxygen inlet connector nozzle; 22, alcohol inlet connector nozzle; 23, outer ring structure; 231, gas oxygen channel; 232, alcohol channel; 24, alcohol injection pre-compression fitting nozzle; 30, connecting assembly; 31, throat structure; 32, connecting flange; 40, combustion mixing chamber; 41, generator combustion chamber; 50, ignition tube; 60, injection disc. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] The embodiments of the present application are described below with reference to the drawings. Figures 1 to 5

[0032] According to the embodiments of the present application, in a first aspect, a kind of ignition starting device for steam generator group is provided, comprising combustion chamber subassembly 10, liquid injection subassembly 20 and connecting component 30;Combustion chamber subassembly 10 includes combustion chamber body 11 and spark plug base 12, spark plug base 12 is connected with combustion chamber body 11 at a predetermined angle;Liquid injection subassembly 20 includes gas oxygen inlet connector nozzle 21, alcohol inlet connector nozzle 22 and outer ring structure 23, outer ring structure 23 is connected with combustion chamber body 11 and coaxial line arrangement, outer ring structure 23 has gas oxygen channel 231 and alcohol channel 232, gas oxygen inlet connector nozzle 21 is communicated with gas oxygen channel 231, gas oxygen channel 231 is communicated with combustion chamber body 11, the end of gas oxygen channel 231 close to combustion chamber body 11 forms gas oxygen injection hole, gas oxygen inlet connector nozzle 21 is arranged in parallel with the axis of combustion chamber body 11, alcohol inlet connector nozzle 22 is connected along the radial direction of outer ring structure 23 and is communicated with alcohol channel 232, alcohol channel 232 is communicated with combustion chamber body 11, the end of alcohol channel 232 close to combustion chamber body 11 forms alcohol injection hole, alcohol injection hole is formed after alcohol is sprayed to form alcohol injection liquid film, the included angle between alcohol injection liquid film and the axis of combustion chamber body 11 is α, and satisfies 60°≤α≤75°;Connecting component 30 is connected with the end of combustion chamber body 11 away from liquid injection subassembly 20.

[0033] The ignition starting device for steam generator group of the present embodiment is used, by limiting the included angle between alcohol injection liquid film and the axis of combustion chamber body 11, while ensuring the smooth formation of high-temperature combustion gas, the wall is heat protected, to avoid the problem of ablation of the inner wall of combustion chamber body 11, and then realize the synchronous and stable starting of steam generator group, and supply large flow of steam in a short time. The heat protection is simple and reliable, without additional cooling medium and cooling channel.

[0034] ​It should be noted that a certain flow of alcohol is sprayed out of the alcohol injection hole, the alcohol near the inner side of the axis is atomized, mixed, evaporated and combusted with the central gas oxygen to form high-temperature combustion gas, and the alcohol near the inner wall surface of the combustion chamber body 11 forms a protective liquid film in the combustion chamber inner wall under the action of centrifugal flow, which isolates the high-temperature combustion gas, thereby realizing the protection of the inner wall of the combustion chamber body 11. The alcohol injection liquid film forms a predetermined angle with the axis of the combustion chamber body 11.

[0035] It should be noted that when α < 60°, the angle between the alcohol injection liquid film and the axis of the combustion chamber body 11 is smaller, and more alcohol is easily sprayed directly along the axis, which affects the formation of the protective liquid film on the inner wall surface of the combustion chamber body 11; when α > 75°, more alcohol is easily sprayed to the inner wall surface of the combustion chamber body 11, which affects the mixing and formation of high-temperature combustion gas.

[0036] In one embodiment, the total flow of the steam generator group ignition starting device is 1‰ of the steam generator flow. The total flow of the steam generator group ignition starting device is 25g / s-45g / s, the oxygen-fuel mixture ratio is 0.6-1, and the single working time can reach 6s-10s. The chamber pressure in the combustion chamber body 11 is adjustable between 2.1-2.8, which is higher than the chamber pressure of the steam generator group.

[0037] Specifically, the rated flow of the steam generator group ignition starting device is 40g / s, the outlet flame is bright, the single working time can reach 8s, and the device can be reliably started repeatedly.

[0038] It is worth noting that the steam generator group ignition starting device has high working adaptability with the steam generator group, realizes synchronous and non-delay stable ignition of the steam generator group, supplies large flow of steam in a short time, has high working reliability, and has engineering use value.

[0039] Specifically, the gas oxygen inlet connector 21, the alcohol inlet connector 22 and the combustion chamber body 11 are made of stainless steel.

[0040] Specifically, the combustion chamber body 11 is a single-walled cylindrical structure with a length-diameter ratio of 5. The combustion chamber body 11 and the spark plug base 12 are connected at a position with a 60° direction to the axis. A stepped hole is formed for positioning and installing the spark plug.

[0041] It should be noted that the installation size of the spark plug base 12 on the combustion chamber body 11 is determined according to the length of the external spark plug. The spark plug base 12 has an ignition end face which is close to but does not protrude from the inner wall surface of the combustion chamber body 11, so as to avoid affecting the gas mixing and combustion efficiency in the combustion chamber body 11 and prevent the ignition end face from overheating and damage.

[0042] Specifically, the gas oxygen injection hole is a straight hole and one is provided.

[0043] It should be noted that in other alternative embodiments, the number of gas-oxygen injection holes can also be provided with multiple, such as two, three, etc.

[0044] Specifically, as shown in Figure 1 The spark plug base 12 is provided with two.

[0045] Specifically, the spark plug base 12 is provided with a mounting thread and a sealing groove, and a sealing ring is arranged in the sealing groove to facilitate the installation and sealing of the spark plug.

[0046] In one embodiment, the diameter of the gas-oxygen injection hole is D1, which satisfies 0.3mm≤D1≤2mm; the diameter of the alcohol injection hole is D2, which satisfies 0.3mm≤D2≤2mm.

[0047] Specifically, the diameter D1 of the gas-oxygen injection hole is 1mm, and the diameter D2 of the alcohol injection hole is 1mm.

[0048] Of course, in other alternative embodiments, the diameter D1 of the gas-oxygen injection hole and the diameter D2 of the alcohol injection hole can also be selected as other sizes according to actual conditions.

[0049] It should be noted that the hole diameter can be flexibly selected according to different injection flow requirements of the steam generator, improving the applicability of the overall device.

[0050] In one embodiment, as shown in Figure 2 The alcohol injection hole is a spiral injection hole, and the retracted length of the gas-oxygen injection hole is L, which satisfies 6mm≤L≤12mm.

[0051] Specifically, the retracted length L of the gas-oxygen injection hole is 9mm.

[0052] Of course, in other alternative embodiments, the retracted length of the gas-oxygen injection hole can also be adjusted according to actual conditions.

[0053] It should be noted that when L<6mm, the distance between the gas-oxygen injection hole and the combustion chamber body 11 is close, reducing the mixing path of gas-oxygen and alcohol, and when L>12mm, the gas-oxygen medium mixes with alcohol too early, which can easily affect the formation of the alcohol protective layer on the inner wall of the combustion chamber body 11.

[0054] It should be noted that the alcohol injection hole is a spiral injection hole, which expands the contact area of the alcohol and the gas-oxygen by forming a spiral gas flow, and by controlling the retracted length of the gas-oxygen injection hole, both the direct impact of gas-oxygen on the wall to damage the liquid film protective layer and the extension of the mixing path to reduce the ignition delay are avoided.

[0055] In other alternative embodiments, the alcohol injection hole can also be a straight injection hole, and the alcohol injection hole is arranged to avoid the ignition end face of the spark plug base 12.

[0056] In one embodiment, as shown in Figure 2 The liquid injection assembly 20 further comprises an alcohol pre-injection compression nozzle 24 connected to the outer ring structure 23 in the radial direction and communicating with the alcohol channel 232, and the alcohol pre-injection compression nozzle 24 is arranged at a predetermined angle with the alcohol inlet connection nozzle 22. The liquid injection assembly 20 further comprises an oxygen pre-injection compression nozzle communicating with the oxygen inlet connection nozzle 21. As shown in Figure 1 and Figure 2 The combustion chamber assembly 10 further comprises a combustion chamber compression nozzle 13 communicating with the combustion chamber body 11, and the combustion chamber compression nozzle 13 is arranged on the side of the spark plug base 12 close to the liquid injection assembly 20.

[0057] Specifically, the alcohol pre-injection compression nozzle 24, the oxygen pre-injection compression nozzle, and the combustion chamber compression nozzle 13 are connected to the external test system.

[0058] Specifically, one end of the oxygen pre-injection compression nozzle communicates with the oxygen inlet connection nozzle 21, and the other end communicates with the external process pipeline.

[0059] It is worth noting that by arranging the alcohol pre-injection compression nozzle 24, the oxygen pre-injection compression nozzle, and the combustion chamber compression nozzle 13, the external test system can be used to monitor the pressure in each component of the device, improve the precision of pressure adjustment, and optimize the overall ignition and combustion performance of the device.

[0060] In one embodiment, as shown in Figure 1 The connecting assembly 30 comprises a throat structure 31 and a connecting flange 32, and the throat structure 31 and the connecting flange 32 are integrally formed. The throat structure 31 is connected to the combustion chamber assembly 10, and the connecting flange 32 is suitable for connecting to the steam generator group.

[0061] Specifically, the throat structure 31 and the connecting flange 32 are made of 2520 material, and the throat structure 31 and the connecting flange 32 are integrally formed to form a monolithic single-arm structure.

[0062] Specifically, the inner profile of the throat structure 31 is a converging-straight-expanding-straight structure, and the throat structure 31 is welded to the combustion chamber body 11. The weld is arranged at the position with the largest diameter of the throat structure 31, away from the throat, to avoid the ablation phenomenon caused by the large heat flow at the throat position during the joint debugging process of the ignition starter and the steam generator.

[0063] It is worth noting that the throat structure 31 and the connecting flange 32 are integrally formed and machined, which enhances the structural reliability, eliminates the splicing gaps of the split connection, and improves the overall sealing performance of the device.

[0064] Working principle: The oxygen inlet nozzle 21 is located in the center, and the alcohol inlet nozzle 22 is located in the radial direction. A certain flow rate of alcohol is sprayed at a predetermined angle to the axis of the combustion chamber body 11 towards the inner wall of the combustion chamber body 11. The alcohol near the inner side of the axis atomizes, mixes, evaporates, and burns with the oxygen in the center to form high-temperature gas. The alcohol near the inner wall of the combustion chamber body 11 forms a protective liquid film on the inner wall of the combustion chamber, isolating the high-temperature gas and providing effective thermal protection for the wall of the combustion chamber body 11 and the ignition end face of the spark plug base 12. The mixed gas is injected into the steam generator group after being pressurized through the throat structure 31 with an inner profile of shrink-straight-expand-straight.

[0065] According to an embodiment of the present invention, in a second aspect, a test method for an ignition starting device for a steam generator assembly is also provided, for installing the aforementioned ignition starting device for a steam generator assembly on a steam generator assembly and conducting a test, comprising the following steps:

[0066] Step S1: Install the steam generator set on the steam generator set using the ignition starter;

[0067] Step S2: Test the physical condition of the ignition and start-up device for the steam generator assembly;

[0068] Step S3: Perform joint commissioning of the steam generator set with the ignition start-up device.

[0069] Furthermore, such as Figure 3 As shown, the steam generator assembly includes a combustion mixing chamber 40, a ignition pipe 50, and an injection plate 60. The combustion mixing chamber 40 contains a generator combustion chamber 41. The injection plate 60 is connected to the combustion mixing chamber 40. The two ends of the ignition pipe 50 are connected to the generator combustion chamber 41 and the connecting assembly 30, respectively. A portion of the ignition pipe 50 extends into the generator combustion chamber 41.

[0070] Specifically, the mixed gas is injected into the ignition tube 50 of the steam generator group to ignite the liquid oxygen / alcohol / water mixture in the combustion chamber 41 of the steam generator, thereby achieving synchronous and stable start-up of a single steam generator or a steam generator group.

[0071] Specifically, the connecting flange 32 and the fire tube 50 are connected by bolts, and a copper gasket is installed between them for sealing.

[0072] Furthermore, step S1 includes:

[0073] Step S11, each combustion chamber 40 is configured with a steam generator group ignition starting device;

[0074] Step S12, the installation position of the fuse 50 is selected;

[0075] Step S13, when the fuse 50 is installed on the body of the combustion chamber 40, the fuse 50 is connected with the combustion chamber 40;

[0076] Step S14, the fuse 50 is connected with the connecting assembly 30.

[0077] It should be noted that in other alternative embodiments, the fuse 50 can also be installed on the head of the combustion chamber 40.

[0078] Further, in step S2, it includes:

[0079] Step S21, the gas-oxygen inlet pipe nozzle 21 and the alcohol inlet pipe nozzle 22 are connected with the external test system;

[0080] Step S22, the steam generator group ignition starting device is supplied with gas-oxygen and alcohol, wherein the gas-oxygen supply pressure is P1, which satisfies 4.5MPa≤P1≤5.7MPa, and the alcohol supply pressure is P2, which satisfies 2.9MPa≤P2≤3.4MPa;

[0081] Step S23, the spark plug is arranged in the combustion chamber assembly 10 to start ignition;

[0082] Step S24, after the ignition is completed, the system nitrogen blowing is started, the nitrogen blowing pressure is P3, which satisfies 3MPa≤P3≤5MPa, and the nitrogen enters the combustion chamber assembly 10 through the gas-oxygen channel 231 and the alcohol channel 232, and flows out through the connecting assembly 30.

[0083] It should be noted that after the ignition is completed, the working medium in the liquid injection assembly 20 is blown out by nitrogen blowing, so as to avoid the residue of the working medium, prolong the service life of the device, and ensure that the channel is smooth for the next start.

[0084] Further, in step S3, it includes:

[0085] Step S31, the steam generator group ignition starting device is started first;

[0086] Step S32, when the ignition is successful, the steam generator group starts to spray the working medium; when the ignition is abnormal, the steam generator group ignition starting device and the steam generator group are shut down urgently.

[0087] It should be noted that, as shown in Figure 4 the gas-oxygen and alcohol pressure in the steam generator group ignition starting device tends to be stable in about 2s.

[0088] It should be noted that the ignition time of the ignition starting device for the steam generator group is up to 5s to 8s; please refer to Figure 5 , Figure 5 in the steam generator group, when the working time approaches 8s, the pressure in the generator combustion chamber 41 tends to be stable, and the steam generator group runs stably and reliably.

[0089] It is worth noting that the ignition starting device for the steam generator group is started first, and then the working medium is introduced, which avoids the working medium entering the unignited combustion chamber to cause flameout, and ensures the stable operation of the system.

[0090] It is worth noting that the ignition starting device for the steam generator group is connected with the steam generator, is convenient to replace, and can be installed at the head or body of the combustion mixing chamber 40; it has high working adaptability with the steam generator group, realizes synchronous and non-delay stable ignition of the steam generator group, supplies large flow induced steam in a short time, has high working reliability, and has engineering use value.

[0091] Although the embodiments of the present application are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and variations all fall within the scope defined by the present application.

Claims

1. An ignition starting device for a steam generator set, characterized by, The application relates to a combustion chamber assembly (10) comprising a combustion chamber body (11) and a spark plug base (12) connected at a predetermined angle with the combustion chamber body (11); a liquid inlet injection assembly (20) comprising an oxygen inlet nozzle (21), an alcohol inlet nozzle (22) and an outer ring structure (23) coaxially connected with the combustion chamber body (11), the outer ring structure (23) having an oxygen channel (231) and an alcohol channel (232), the oxygen inlet nozzle (21) being in communication with the oxygen channel (231), the oxygen channel (231) being in communication with the combustion chamber body (11), the oxygen channel (231) having an oxygen injection hole at one end close to the combustion chamber body (11), the oxygen inlet nozzle (21) being arranged in parallel with the axis of the combustion chamber body (11), the alcohol inlet nozzle (22) being connected along the radial direction of the outer ring structure (23) and in communication with the alcohol channel (232), the alcohol channel (232) being in communication with the combustion chamber body (11), the alcohol channel (232) having an alcohol injection hole at one end close to the combustion chamber body (11), alcohol being sprayed from the alcohol injection hole to form an alcohol injection liquid film, the angle between the alcohol injection liquid film and the axis of the combustion chamber body (11) being alpha, and 60 DEG <= alpha <= 75 DEG; a connecting assembly (30) connected with the combustion chamber body (11) at the end away from the liquid inlet injection assembly (20). The diameter of the oxygen injection hole is D1, and 0.3 mm <= D1 <= 2 mm; and / or the diameter of the alcohol injection hole is D2, and 0.3 mm <= D2 <= 2 mm. The alcohol injection hole is a spiral flow injection hole, the oxygen injection hole has a retracted length L, and 6 mm <= L <= 12 mm; or the alcohol injection hole is a straight flow injection hole, the spark plug base (12) has an ignition end face, and the alcohol injection hole is arranged away from the ignition end face. The liquid inlet injection assembly (20) further comprises an alcohol pre-injection compression nozzle (24) connected along the radial direction of the outer ring structure (23) and in communication with the alcohol channel (232), and the alcohol pre-injection compression nozzle (24) is arranged at a predetermined angle with the alcohol inlet nozzle (22); and / or 2. The ignition starting device for a steam generator set according to claim 1, wherein The combustion chamber assembly (10) further comprises a combustion chamber compression nozzle (13) in communication with the combustion chamber body (11), and the combustion chamber compression nozzle (13) is arranged on the side of the spark plug base (12) close to the liquid inlet injection assembly (20).

3. The ignition starting device for a steam generator set according to claim 1, wherein ​ 4. The ignition starting device for a steam generator set according to any one of claims 1 to 3, characterized in that, ​ ​ 5. The ignition starting device for a steam generator set according to any one of claims 1 to 3, characterized by The connecting assembly (30) comprises a throat structure (31) and a connecting flange (32), the throat structure (31) is integrally arranged with the connecting flange (32), the throat structure (31) is connected with the combustion chamber assembly (10), and the connecting flange (32) is suitable for being connected with a steam generator group.

6. A test method of a firing-up device for a steam generator set for installing and testing the firing-up device for a steam generator set according to any one of claims 1 to 5 on a steam generator set, characterized by, The method comprises the following steps: Step S1, installing the steam generator group ignition starting device on the steam generator group by using an ignition starting device; Step S2, testing the body state of the steam generator group ignition starting device; Step S3, jointly debugging the steam generator group ignition starting device and the steam generator group.

7. The test method of the ignition starting device for the steam generator set according to claim 6, characterized by, The steam generator group comprises a combustion mixing chamber (40), a fuse tube (50) and an injection disc (60), the combustion mixing chamber (40) is provided with a generator combustion chamber (41) therein, the injection disc (60) is connected with the combustion mixing chamber (40), two ends of the fuse tube (50) are communicated with the generator combustion chamber (41) and the connecting assembly (30) respectively, and part of the fuse tube (50) extends into the generator combustion chamber (41).

8. The test method of the ignition starting device for the steam generator set according to claim 7, characterized by, In the step S1, the following steps are included: Step S11, one steam generator group ignition starting device is arranged for each combustion mixing chamber (40); Step S12, the installation position of the fuse tube (50) is selected; Step S13, when the fuse tube (50) is selected to be installed at the head of the combustion mixing chamber (40), the fuse tube (50) is welded and fixed with the injection disc (60), the combustion mixing chamber (40) is further provided with a working medium collecting cavity, and the fuse tube (50) is arranged in isolation from the working medium collecting cavity; when the fuse tube (50) is selected to be installed at the body of the combustion mixing chamber (40), the fuse tube (50) is connected with the combustion mixing chamber (40); Step S14, the fuse tube (50) is connected with the connecting assembly (30).

9. The test method of the ignition starting device for the steam generator set according to claim 6, characterized by, In the step S2, the following steps are included: Step S21, connecting the gas-oxygen inlet connector (21) and the alcohol inlet connector (22) with an external test system; Step S22, supplying gas-oxygen and alcohol to the steam generator group ignition starting device, wherein the gas-oxygen supply pressure is P1, 4.5MPa≤P1≤5.7MPa is met, the alcohol supply pressure is P2, 2.9MPa≤P2≤3.4MPa is met; Step S23, arranging a spark plug in the combustion chamber assembly (10) to perform ignition starting; Step S24, opening system nitrogen blowing after ignition is completed, the nitrogen blowing pressure is P3, 3MPa≤P3≤5MPa is met, and the nitrogen enters the combustion chamber assembly (10) through the gas-oxygen channel (231) and the alcohol channel (232) and flows out through the connecting assembly (30).

10. The test method of the ignition starting device for the steam generator set according to claim 9, characterized by, In the step S3, the following steps are included: Step S31, starting the steam generator group ignition starting device first; Step S32, when ignition is successful, the steam generator group starts to inject working medium; when ignition is abnormal, the steam generator group ignition starting device and the steam generator group are shut down urgently.

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