阅读说明：本技术 一种透平干气密封及缸冷却系统装置及其运行方法 (Turbine dry gas sealing and cylinder cooling system device and operation method thereof ) 是由 李振亚 范雪飞 朱幼君 赵峰 张天博 边文杰 于 2021-08-27 设计创作，主要内容包括：本发明提供一种透平干气密封及缸冷却系统装置及其运行方法,所述透平干气密封及缸冷却系统装置包括透平机、密封气储存装置、控温装置和干气密封器件；所述透平机的缸体上设置有冷却夹层,所述冷却夹层的进口与密封气储存装置相连,所述冷却夹层的出口与所述控温装置相连；所述控温装置与干气密封器件相连。所述透平干气密封及缸冷却系统装置通过透平缸体的余热对干气密封的密封气加热能够降低系统厂用电的用电量,系统简单,便于工程上实施,提高了整体的循环效率,长期运行将大大提高电加热器的使用寿命,降低干气密封系统的运行期投入成本。(The invention provides a turbine dry gas sealing and cylinder cooling system device and an operation method thereof, wherein the turbine dry gas sealing and cylinder cooling system device comprises a turbine, a sealing gas storage device, a temperature control device and a dry gas sealing device; a cooling interlayer is arranged on a cylinder body of the turbine, an inlet of the cooling interlayer is connected with a sealing gas storage device, and an outlet of the cooling interlayer is connected with the temperature control device; the temperature control device is connected with the dry gas sealing device. The turbine dry gas seal and cylinder cooling system device can reduce the power consumption of system auxiliary power by heating the seal gas of the dry gas seal through the waste heat of the turbine cylinder body, has simple system, is convenient for engineering implementation, improves the whole circulation efficiency, greatly prolongs the service life of the electric heater after long-term operation, and reduces the operation period investment cost of the dry gas seal system.)

1. A turbine dry gas sealing and cylinder cooling system device is characterized by comprising a turbine, a sealing gas storage device, a temperature control device and a dry gas sealing device;

a cooling interlayer is arranged on a cylinder body of the turbine, an inlet of the cooling interlayer is connected with a sealing gas storage device, and an outlet of the cooling interlayer is connected with the temperature control device;

the temperature control device is connected with the dry gas sealing device.

2. The turbine dry gas seal and cylinder cooling system of claim 1, wherein the turbine dry gas seal and cylinder cooling system includes a split flow control device disposed between a seal gas storage device and an outlet of the cooling jacket;

preferably, the flow dividing control device is connected with the temperature control device.

3. The turbine dry gas sealing and cylinder cooling system device according to claim 1 or 2, wherein the turbine dry gas sealing and cylinder cooling system device comprises a temperature measuring component arranged on a pipeline connecting the flow dividing control device and the temperature control device.

4. The turbine dry gas seal and cylinder cooling system assembly of claim 3 wherein said temperature measurement component is in signal communication with said temperature control device.

5. The turbine dry gas seal and cylinder cooling system assembly of any one of claims 1 to 4 wherein the cooling interlayer is disposed on the turbine cylinder;

preferably, the cooling interlayer is a whole-circle circular interlayer arranged on the cylindrical cylinder body or a semi-annular interlayer arranged on the split surface closing cylinder;

preferably, the cooling interlayer comprises a pipe bundle with the diameter of 1-20 mm;

preferably, a reinforced heat transfer component is arranged in the cooling interlayer;

preferably, the thickness of the thin wall of the turbine cylinder is 2-30 mm;

preferably, the inlet of the cooling interlayer is a circular hole of 5-50 mm communicated with the cooling interlayer;

preferably, the outlet of the cooling interlayer is a circular hole of 5-50 mm communicated with the cooling interlayer.

6. A method of operating a turbine dry gas seal and cylinder cooling system assembly as claimed in any one of claims 1 to 5, the method comprising:

and sealing gas is introduced into the cooling interlayer from the sealing gas storage device, enters the temperature control device to adjust the temperature after exchanging heat with the turbine, and is sent into the dry gas sealing device to be sealed.

7. The operation method according to claim 6, wherein the sealing gas is subjected to the action of a flow dividing control device, and a first part is introduced into the cooling interlayer to exchange heat with the turbine cylinder and then is merged with a second part to obtain merged gas.

8. The operating method according to claim 7, wherein the temperature of the merged gas is measured by a temperature measuring part and fed back to a flow dividing control device to adjust and control the flow ratio of the first part and the second part;

preferably, when the temperature of the merged gas measured by the temperature measuring part is greater than a preset value, the merged gas is fed back to the flow dividing control device, and the flow ratio of the first part to the second part is reduced;

preferably, when the temperature of the merged gas measured by the temperature measuring part is less than or equal to a preset value, the merged gas is fed back to the flow dividing control device, and the flow ratio of the first part to the second part is increased;

preferably, when the temperature of the merged gas measured by the temperature measuring part does not conform to the preset range, the temperature control device is started to adjust the temperature to the preset range.

9. The operating method according to any one of claims 6 to 8, wherein the seal gas has an initial temperature of 20 to 80 ℃;

preferably, the preset value is 95-195 ℃;

preferably, the preset range is 90-200 ℃;

preferably, the temperature of the initial turbine cylinder in the turbine is 200-800 ℃.

10. The operating method according to any one of claims 6 to 9, characterized in that it comprises the following steps:

the sealing gas self-sealing gas storage device is used for introducing the first part into the cooling interlayer to exchange heat with the turbine and then converging the second part with the turbine under the action of the flow dividing control device to obtain converging gas;

when the temperature of the converged gas measured by the temperature measuring part is greater than a preset value, the converged gas is fed back to the flow dividing control device, and the flow ratio of the first part to the second part is reduced; when the temperature of the converged gas measured by the temperature measuring part is less than or equal to a preset value, the converged gas is fed back to the flow dividing control device, and the flow ratio of the first part to the second part is increased; and when the temperature of the converged gas measured by the temperature measuring part does not accord with the preset range, starting the temperature control device to adjust the temperature to the preset range, and then sending the temperature to a dry gas sealing device for sealing.

Technical Field

The invention relates to the technical field of chemical equipment, in particular to a turbine dry gas sealing and cylinder cooling system device and an operation method thereof.

Background

With the development of power generation technology, a generator set adopts supercritical carbon dioxide to replace steam as a circulating working medium, and has the advantages of high circulation efficiency, compact equipment structure, low initial investment of capital construction and the like in a certain power range, so that the number of processes and equipment using the existing supercritical carbon dioxide as the circulating working medium is gradually increased.

For example, CN113137293A discloses a supercritical carbon dioxide circulation system and a method for adjusting and emergency stopping of a turbine, which is to perform the adjustment and emergency stopping of the turbine and the compressor of the supercritical carbon dioxide circulation system during the operation process by the linkage adjustment of the main loop heater power, the rotation speed of the compressor, the anti-surge valve opening, the inlet adjusting valve opening of the turbine, and the turbine bypass valve opening. However, this method is difficult to achieve sufficient utilization of heat and consumes a large amount of electricity.

CN111305915A discloses a supercritical carbon dioxide turbine and a main shaft cooling system thereof, which can cool the main shaft of the supercritical carbon dioxide turbine, and ensure that the components in the supercritical carbon dioxide turbine are at normal working temperature. However, this system involves only cooling of the turbine main shaft, and it is difficult to achieve sufficient utilization of the heat.

CN1100193C discloses a turbine and a method for cooling the same, which has a housing, an inflow region for a working fluid formed at least partially by the housing, a cooling fluid duct, a moving blade carrier arranged in the housing extending along a main axis, and a shielding element arranged in the inflow region for shielding the moving blade carrier from the working fluid and fixed to the housing by a support, where the duct passes through the support. However, this method is difficult to achieve sufficient heat utilization and consumes a large amount of electricity.

Therefore, it is necessary to develop a turbine and a cooling method thereof capable of sufficiently utilizing heat.

Disclosure of Invention

In view of the problems in the prior art, the invention provides a turbine dry gas sealing and cylinder cooling system device and an operation method thereof, wherein the turbine dry gas sealing and cylinder cooling system device simultaneously realizes cooling of a cylinder body structure and heating of sealing gas, reduces the power consumption of system service power, improves the whole cycle efficiency, greatly prolongs the service life of an electric heater after long-term operation, and reduces the investment cost of a dry gas sealing system.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the invention provides a turbine dry gas sealing and cylinder cooling system device, which comprises a turbine, a sealing gas storage device, a temperature control device and a dry gas sealing device;

a cooling interlayer is arranged on a cylinder body of the turbine, an inlet of the cooling interlayer is connected with a sealing gas storage device, and an outlet of the cooling interlayer is connected with the temperature control device;

the temperature control device is connected with the dry gas sealing device.

According to the turbine dry gas sealing and cylinder cooling system device, the sealing gas is conveyed to the cooling interlayer on the cylinder body of the turbine from the sealing gas storage device, so that heat exchange between the sealing gas and the cylinder body of the turbine is realized, meanwhile, the temperature control device is arranged, the temperature of the sealing gas is timely supplemented and regulated, high power consumption of an electric heating device adopted by the original sealing gas is avoided, and the service life of the electric heater is prolonged.

Preferably, the turbine dry gas seal and cylinder cooling system device comprises a split flow control device arranged between a seal gas storage device and an outlet of the cooling jacket.

The invention preferably adopts a shunt control device, the sealing gas is shunted by the shunt control device after coming out of the sealing gas storage device, the first part enters the cooling interlayer, and the second part is directly mixed with the first part coming out of the cooling interlayer and then is introduced into the dry gas sealing device, so that the cooling temperature of the dry gas sealing device and the cooling interlayer with different flow requirements can be adjusted. In addition, because the exhaust temperature of the turbine is about 400 ℃, for example, 300-500 ℃, exceeds the acceptable temperature of the cylinder body material, and the temperature of the gas pumped out from the sealing gas storage device is only 20-80 ℃, when heat exchange is carried out in the cooling interlayer, the dry gas sealing device has specific requirements on the flow requirement of the sealing gas, and if a flow dividing control device is not arranged, the balance between the flow of the sealing gas and the temperature of the turbine cylinder body is difficult to realize.

Preferably, the seal gas storage device comprises a supercritical carbon dioxide storage device.

Preferably, the flow dividing control device is connected with the temperature control device.

Preferably, a pipeline connecting the flow dividing control device and the temperature control device is connected with an outlet of the cooling interlayer. Thereby, the mixing of the two streams divided by the flow dividing control device can be realized.

Preferably, the temperature control device comprises an electric heater.

Preferably, a mixing device is arranged on a pipeline connecting the flow distribution control device and the temperature control device, and the mixing device is also connected with an outlet of the cooling interlayer.

Preferably, the flow dividing control device comprises a flow control member for controlling the flow rate.

Preferably, the flow control means comprises an air vent valve.

Preferably, the turbine dry gas sealing and cylinder cooling system device comprises a temperature measuring component arranged on a pipeline connecting the flow dividing control device and the temperature control device.

The invention preferably detects the temperature of the fluid after the flow control device, feeds the fluid back to the flow control device, and regulates and controls the flow rate directly entering the cooling interlayer and the flow rate not entering the cooling interlayer so as to achieve the balance of the temperature of the cylinder body and the temperature of the sealing gas.

Preferably, the temperature measuring component is in signal connection with the temperature control device.

Preferably, the cooling jacket is arranged on the turbine cylinder.

The specific structure of the cooling interlayer is not particularly limited in the present invention, and any interlayer design which can be used for cooling and is well known to those skilled in the art can be adopted, and a heat transfer enhancing component can be arranged in the interlayer, and can be adjusted according to the actual process.

Preferably, the cooling interlayer is a full circle circular interlayer arranged on the cylindrical cylinder body or a semi-annular interlayer arranged on the split surface closing cylinder.

Preferably, the cooling jacket comprises a tube bundle.

Preferably, the cooling jacket comprises a bundle of tubes having a diameter of 1 to 20mm, for example 1mm, 2mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 18mm or 20mm, but not limited to the values recited, and other values not recited within this range are equally applicable.

Preferably, a reinforced heat transfer component is arranged in the cooling interlayer.

Preferably, the enhanced heat transfer member includes a fin or an irregular heat exchange channel.

Preferably, the thin wall of the turbine cylinder is a welding thin wall.

Preferably, the material of the turbine cylinder is ZG12Cr10Mo1W1NiVNbN, stainless steel and/or chromium molybdenum vanadium steel.

Preferably, the thin wall of the turbine cylinder has a thickness of 2 to 30mm, and may be, for example, 2mm, 5mm, 7mm, 9mm, 10mm, 12mm, 14mm, 15mm, 17mm, 19mm, 20mm, 25mm, 28mm, or 30mm, but is not limited to the values listed, and other values not listed in this range are also applicable.

Preferably, the inlet of the cooling interlayer is a round hole communicated with the cooling interlayer.

Preferably, the outlet of the cooling interlayer is a round hole communicated with the cooling interlayer.

Preferably, the inlet of the cooling interlayer is a circular hole of 5-50 mm, such as 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm or 50mm, which is communicated with the cooling interlayer, but not limited to the values listed, and other values not listed in the range are also applicable.

Preferably, the outlet of the cooling interlayer is a circular hole of 5-50 mm, such as 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm or 50mm, which is communicated with the cooling interlayer, but not limited to the values listed, and other values not listed in the range are also applicable.

In a second aspect, the present invention provides a method for operating the turbine dry gas seal and cylinder cooling system apparatus according to the first aspect, the method comprising:

and sealing gas is introduced into the cooling interlayer from the sealing gas storage device, enters the temperature control device to adjust the temperature after exchanging heat with the turbine, and is sent into the dry gas sealing device to be sealed.

According to the dry gas sealing and cylinder cooling system device for the turbine, the sealing gas with lower initial temperature exchanges heat with the cylinder body of the turbine and then enters the dry gas sealing device for sealing, so that the heating heat of the sealing gas in the original dry gas sealing device is reduced, the temperature of the cylinder body of the turbine is reduced, the use of cooling media is reduced, and the economic benefit is improved.

Preferably, the sealing gas can be called shaft sealing gas and the like without being limited by names, and the working medium comprises supercritical carbon dioxide and other gases.

Preferably, under the action of the split flow control device, the first part of the seal gas is introduced into the cooling interlayer to exchange heat with the turbine and then is converged with the second part to obtain the converged gas.

Preferably, the temperature of the merged gas is measured by a temperature measuring component and fed back to a flow dividing control device, and the flow ratio of the first part and the second part is adjusted and controlled.

Preferably, when the temperature of the merged gas measured by the temperature measuring part is larger than a preset value, the merged gas is fed back to the flow dividing control device, and the flow ratio of the first part to the second part is reduced.

Preferably, when the temperature of the merged gas measured by the temperature measuring part is less than or equal to a preset value, the merged gas is fed back to the flow dividing control device, and the flow ratio of the first part to the second part is increased.

Preferably, the flow ratio of the first part to the second part is (0.9-1.2): 2.8-3.9, and may be, for example, 0.9:2.8, 0.9:2.9, 0.9:3.0, 0.9:3.5, 0.9: 3.9, 0.94:2.8, 0.96:3.01, 0.98:3.52, 0.99:3.15, 1.1:2.8, 1.1:3.12, 1.1:3.25, 1.1:3.6, 1.1:3.9, 1.2:2.8, 1.2:3.01, 1.2:3.4, 1.2:3.7, or 1.2:3.9, etc.

Preferably, the magnitude of the adjustment for increasing the flow ratio of the first part to the second part is (A + C1): (B-C1) on the basis of the original A: B, and the range of the C1 is 0.01-0.05, such as 0.01, 0.02, 0.03, 0.04 or 0.05.

Preferably, the flow ratio of the first part and the second part is reduced to (A-C2): (B + C2) on the basis of the original A: B, and the C2 is in the range of 0.01-0.05, such as 0.01, 0.02, 0.03, 0.04 or 0.05.

Preferably, a is any value of 0.9 to 1.2, and may be, for example, 0.9, 0.92, 0.95, 0.98, 0.99, 1.0, 1.01, 1.02, 1.03, 1.05, 1.08, 1.1, 1.12, 1.15, 1.18, 1.2, or the like.

Preferably, B is any number from 2.8 to 3.9, and may be, for example, 2.8, 2.82, 2.85, 2.86, 2.89, 3.0, 3.01, 3.05, 3.08, 3.1, 3.12, 3.15, 3.16, 3.2, 3.21, 3.23, 3.5, 3.6, 3.7, 3.8, or 3.9.

Preferably, when the temperature of the merged gas measured by the temperature measuring part does not conform to the preset range, the temperature control device is started to adjust the temperature to the preset range.

Preferably, the initial temperature of the sealing gas is 20 to 80 ℃, and may be, for example, 20 ℃, 27 ℃, 30 ℃, 40 ℃, 47 ℃, 50 ℃, 60 ℃, 67 ℃, 70 ℃ or 80 ℃, but is not limited to the recited values, and other values not recited in the range are also applicable.

Preferably, the preset value is within a preset range.

Preferably, the predetermined value is 95 to 195 ℃, and may be, for example, 95 ℃, 100 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃, 140 ℃, 150 ℃, 160 ℃, 170 ℃, 180 ℃, or 195 ℃, etc., but is not limited to the recited values, and other values not recited in the range are also applicable.

Preferably, the predetermined range is 90 to 200 ℃, for example, 90 ℃, 100 ℃, 115 ℃, 120 ℃, 125 ℃, 130 ℃, 140 ℃, 150 ℃, 160 ℃, 170 ℃, 180 ℃, or 200 ℃, etc., but not limited to the enumerated values, and other values not enumerated within the range are also applicable. The invention sets the preset range in a specific range preferably, and controls the proportion of the flow of the two parts in a combined manner, thereby timely controlling the temperature of the cylinder body of the turbine and the temperature of the sealing gas in a feedback manner.

Preferably, the temperature of the initial turbine cylinder in the turbine is 200 to 800 ℃, and may be, for example, 200 ℃, 300 ℃, 400 ℃, 460 ℃, 500 ℃, 550 ℃, 600 ℃, 650 ℃, 700 ℃, 750 ℃, or 800 ℃, etc., but is not limited to the recited values, and other values not recited in the range are also applicable.

As a preferred technical scheme of the invention, the operation method comprises the following steps:

the sealed gas self-sealing gas storage device is characterized in that under the action of the flow dividing control device, the first part is introduced into the cooling interlayer to be subjected to heat exchange with the turbine and then is converged with the second part to obtain converged gas.

When the temperature of the converged gas measured by the temperature measuring part is greater than a preset value, the converged gas is fed back to the flow dividing control device, and the flow ratio of the first part to the second part is reduced; when the temperature of the converged gas measured by the temperature measuring part is less than or equal to a preset value, the converged gas is fed back to the flow dividing control device, and the flow ratio of the first part to the second part is increased; and when the temperature of the converged gas measured by the temperature measuring part does not accord with the preset range, starting the temperature control device to adjust the temperature to the preset range, and then sending the temperature to a dry gas sealing device for sealing.

Compared with the prior art, the invention has at least the following beneficial effects:

(1) the turbine dry gas sealing and cylinder cooling system device provided by the invention realizes full utilization of heat only by additionally arranging the connecting pipeline, the system efficiency is improved by 0.05-0.3%, the power consumption is saved by 5-10 kw for a system with 10kw of electric heater power, and the power consumption is saved by 150-200 kw for a system with 200kw of electric heater power;

(2) the operation method of the turbine dry gas sealing and cylinder cooling system device provided by the invention improves the circulation efficiency of the supercritical carbon dioxide and other sealing gases, obviously prolongs the service life of the electric heating device in the temperature control device after long-term operation, saves 11-17 electric heaters by 30 years of the operation life of the turbine, and reduces the investment cost of a dry gas sealing system.

Drawings

FIG. 1 is a schematic diagram of a turbine dry gas seal and cylinder cooling system arrangement provided by the present invention.

FIG. 2 is a schematic view of a portion of a turbine in a dry gas seal and cylinder cooling system arrangement of the present invention.

Fig. 3 is a schematic diagram of a dry gas sealing device in the turbine dry gas sealing and cylinder cooling system device provided in embodiment 1.

Fig. 4 is a schematic diagram of a dry gas sealing device in the turbine dry gas sealing and cylinder cooling system apparatus provided in embodiment 2.

In the figure: 1-a sealed gas storage device; 2-a shunt control device; 3-a mixing device; 4-a turbine; 41-inlet of cooling interlayer; 42-cooling the interlayer; 43-outlet of cooling jacket; 44-turbine cylinder; 5-a temperature measuring component; 6-temperature control device; 7-dry gas seal device; 71-sealing the gas inlet; 72-first leakage outlet; 73-a second leakage outlet; 74-barrier gas inlet; 75-discharge of condensation.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

The present invention is described in further detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.

It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

It should be understood by those skilled in the art that the present invention necessarily includes necessary piping, conventional valves and general pump equipment for achieving the complete process, but the above contents do not belong to the main inventive points of the present invention, and those skilled in the art can select the layout of the additional equipment based on the process flow and the equipment structure, and the present invention is not particularly limited to this.

As a specific embodiment of the present invention, the present invention provides a turbine dry gas sealing and cylinder cooling system apparatus, which includes a turbine 4, a sealing gas storage device 1, a temperature control device 6 and a dry gas sealing device 7; a cooling interlayer 42 is arranged on the cylinder body of the turbine 4, an inlet 41 of the cooling interlayer is connected with the sealing gas storage device 1, and an outlet 43 of the cooling interlayer is connected with the temperature control device 6; the temperature control device 6 is connected with a dry gas sealing device 7.

The turbine dry gas sealing and cylinder cooling system device comprises a flow dividing control device 2 arranged between a sealing gas storage device 1 and an outlet 43 of the cooling interlayer; the shunt control device 2 is connected with the temperature control device 6. And the pipeline of the flow distribution control device 2 connected with the temperature control device 6 is connected with the outlet 43 of the cooling interlayer. It is also possible to provide the mixing device 3 on the connecting pipe as the case may be. The turbine dry gas sealing and cylinder cooling system device comprises a temperature measuring part 5 arranged on a pipeline connected with the flow dividing control device 2 and the temperature control device 6.

The cooling interlayer 42 is arranged on a turbine cylinder 44; the cooling interlayer 42 is a whole circle circular interlayer arranged on the cylindrical cylinder body or a semi-annular interlayer arranged on the middle split surface closing cylinder. The cooling interlayer 42 may be provided with a reinforced heat transfer member according to practical conditions. The thin wall of the turbine cylinder 44 is a welded thin wall.

The invention also provides an operation method of the turbine dry gas sealing and cylinder cooling system device, which comprises the following steps:

the method comprises the following steps that sealing gas with the initial temperature of 20-80 ℃ is stored in a sealing gas storage device 1, under the action of a flow dividing control device 2, a first part is introduced into a cooling interlayer 42 to exchange heat with a turbine 4 and then is converged with a second part to obtain converged gas;

when the temperature of the merged gas measured by the temperature measuring part 5 is more than 95-195 ℃, the merged gas is fed back to the flow dividing control device 2, and the flow ratio of the first part and the second part is reduced; when the temperature of the merged gas measured by the temperature measuring part 5 is less than or equal to 95-195 ℃, the merged gas is fed back to the flow dividing control device 2, and the flow ratio of the first part to the second part is increased; and when the temperature of the converged gas measured by the temperature measuring part 5 does not accord with the preset range of 90-200 ℃, starting the temperature control device 6 to adjust the temperature to the preset range of 90-200 ℃, and then sending the temperature to the dry gas sealing device 7 for sealing.

The following specific application examples and comparative application examples are shown by numerical ranges because of fluctuations in parameters during operation.

Example 1

The embodiment provides a turbine dry gas sealing and cylinder cooling system device, which comprises a turbine 4, a sealing gas storage device 1, a temperature control device 6 and a dry gas sealing device 7. The seal gas storage device 1 is a supercritical carbon dioxide storage device.

A cooling interlayer 42 is arranged on the cylinder body of the turbine 4, an inlet 41 of the cooling interlayer is connected with the sealing gas storage device 1, and an outlet 43 of the cooling interlayer is connected with the temperature control device 6; the temperature control device 6 is connected with a dry gas sealing device 7. The inlet 41 of the cooling interlayer is a 25mm round hole communicated with the cooling interlayer 42; the outlet 43 of the cooling interlayer is a 20mm round hole communicated with the cooling interlayer 42. The cooling interlayer 42 is arranged on a turbine cylinder 44; the cooling interlayer 42 is a full circle circular interlayer arranged on the cylindrical cylinder body. An enhanced heat transfer component is arranged in the cooling interlayer 42; the enhanced heat transfer member includes a fin.

The thin wall of the turbine cylinder 44 is a welding thin wall, the material of the turbine cylinder 44 is ZG12Cr10Mo1W1NiVNbN, and the thickness of the thin wall of the turbine cylinder 44 is 15 mm.

The dry gas sealing device 7 is a single-end-face dry gas sealing structure connected by screws, and as shown in fig. 3 in particular, as can be seen from fig. 3, the dry gas sealing device 7 includes a sealing gas inlet 71, a first leakage outlet 72 and an isolating gas inlet 74 which are sequentially arranged on the circumferential side from the side close to the medium to the side close to the atmosphere, and a condensation discharge port 75 which is arranged on the opposite circumferential side of the first leakage outlet 72, and the remaining specific structures are common structures in the art, and are not described herein again.

The turbine dry gas sealing and cylinder cooling system device comprises a flow dividing control device 2 arranged between a sealing gas storage device 1 and an outlet 43 of the cooling interlayer; the flow distribution control device 2 includes a flow control member for controlling the flow rate. The flow control member comprises an air vent valve. The shunt control device 2 is connected with the temperature control device 6. The pipeline that reposition of redundant personnel controlling means 2 with temperature regulating device 6 links to each other is provided with mixing arrangement 3, mixing arrangement 3 with the export 43 of cooling intermediate layer links to each other.

The turbine dry gas sealing and cylinder cooling system device comprises a temperature measuring part 5 arranged on a pipeline connected with the flow dividing control device 2 and the temperature control device 6. The temperature measuring unit 5 is in signal connection (not shown) with the temperature control device 6. The temperature control device 6 comprises an electric heater.

Example 2

The embodiment provides a turbine dry gas sealing and cylinder cooling system device, which comprises a turbine 4, a sealing gas storage device 1, a temperature control device 6 and a dry gas sealing device 7. The seal gas storage device 1 is a supercritical carbon dioxide storage device.

A cooling interlayer 42 is arranged on the cylinder body of the turbine 4, an inlet 41 of the cooling interlayer is connected with the sealing gas storage device 1, and an outlet 43 of the cooling interlayer is connected with the temperature control device 6; the temperature control device 6 is connected with a dry gas sealing device 7. The inlet 41 of the cooling interlayer is a 30mm round hole communicated with the cooling interlayer 42; the outlet 43 of the cooling interlayer is a 30mm round hole communicated with the cooling interlayer 42. The cooling interlayer 42 is arranged on a turbine cylinder 44; the cooling interlayer 42 is a full circle circular interlayer arranged on the cylindrical cylinder body. And a Z-shaped irregular heat exchange channel is arranged in the cooling interlayer 42.

The thin wall of the turbine cylinder 44 is a welded thin wall, the material of the turbine cylinder 44 is chromium molybdenum vanadium steel, and the thickness of the thin wall of the turbine cylinder 44 is 20 mm.

The dry gas sealing device 7 is a single-end-face dry gas sealing structure fixed by a collar, as shown in fig. 4 specifically, as can be seen from fig. 4, the dry gas sealing device 7 includes a sealing gas inlet 71, a first leakage outlet 72, a second leakage outlet 73 and an isolation gas inlet 74 which are sequentially arranged on the circumferential side from the side close to the medium to the side close to the atmosphere, and a condensation discharge port 75 arranged on the opposite circumferential side of the first leakage outlet 72, and other specific structures are common structures in the art and are not described herein again.

The turbine dry gas sealing and cylinder cooling system device comprises a flow dividing control device 2 arranged between a sealing gas storage device 1 and an outlet 43 of the cooling interlayer; the flow distribution control device 2 includes a flow control member for controlling the flow rate. The flow control member comprises an air vent valve. The shunt control device 2 is connected with the temperature control device 6. The pipeline that reposition of redundant personnel controlling means 2 with temperature regulating device 6 links to each other is provided with mixing arrangement 3, mixing arrangement 3 with the export 43 of cooling intermediate layer links to each other.

The turbine dry gas sealing and cylinder cooling system device comprises a temperature measuring part 5 arranged on a pipeline connected with the flow dividing control device 2 and the temperature control device 6. The temperature measuring component 5 is in signal connection with the temperature control device 6. The temperature control device 6 comprises an electric heater.

Example 3

The embodiment provides a turbine dry gas sealing and cylinder cooling system device, which comprises a turbine 4, a sealing gas storage device 1, a temperature control device 6 and a dry gas sealing device 7. The seal gas storage device 1 is a supercritical carbon dioxide storage device.

A cooling interlayer 42 is arranged on the cylinder body of the turbine 4, an inlet 41 of the cooling interlayer is connected with the sealing gas storage device 1, and an outlet 43 of the cooling interlayer is connected with the temperature control device 6; the temperature control device 6 is connected with a dry gas sealing device 7. The inlet 41 of the cooling interlayer is a 10mm round hole communicated with the cooling interlayer 42; the outlet 43 of the cooling interlayer is a 10mm round hole communicated with the cooling interlayer 42. The cooling interlayer 42 is arranged on a turbine cylinder 44; the cooling interlayer 42 is a full circle circular interlayer arranged on the cylindrical cylinder body. An enhanced heat transfer component is arranged in the cooling interlayer 42; the enhanced heat transfer member includes a fin.

The thin wall of the turbine cylinder 44 is a welded thin wall, the turbine cylinder 44 is made of stainless steel, and the thin wall of the turbine cylinder 44 is 5mm thick.

The dry gas sealing device 7 is a single-end-face dry gas sealing structure connected by screws, the dry gas sealing device 7 comprises a sealing gas inlet 71, a first leakage outlet 72 and an isolation gas inlet 74 which are sequentially arranged on the circumferential side from the side close to a medium to the side close to the atmosphere, and a condensation discharge port 75 which is arranged on the relative circumferential side of the first leakage outlet 72, and other specific structures are common structures in the field and are not described again.

The turbine dry gas sealing and cylinder cooling system device comprises a flow dividing control device 2 arranged between a sealing gas storage device 1 and an outlet 43 of the cooling interlayer; the flow distribution control device 2 includes a flow control member for controlling the flow rate. The flow control member comprises an air vent valve. The shunt control device 2 is connected with the temperature control device 6. And the pipeline of the flow distribution control device 2 connected with the temperature control device 6 is connected with the outlet 43 of the cooling interlayer.

The turbine dry gas sealing and cylinder cooling system device comprises a temperature measuring part 5 arranged on a pipeline connected with the flow dividing control device 2 and the temperature control device 6. The temperature measuring component 5 is in signal connection with the temperature control device 6. The temperature control device 6 comprises an electric heater.

Example 4

This embodiment provides a dry gas turbine seal and cylinder cooling system apparatus, which is the same as that of embodiment 1 except that no enhanced heat transfer member is provided and the connection relationship is established.

Comparative example 1

The present comparative example provides a turbine dry gas seal and cylinder cooling system device, which is the same as in example 1 except that no temperature control device and no connection relationship are provided.

Comparative example 2

This comparative example provides a turbine dry gas seal and cylinder cooling system device, which is the same as in example 1 except that the outlet of the cooling jacket is not connected to the temperature control device.

The following application examples and application comparative examples take supercritical carbon dioxide medium as an example, and the invention can also be applied to other similar working media, and are not described herein again.

Application example 1

The present application provides a method of operating the turbine dry gas seal and cylinder cooling system apparatus of embodiment 1, the method comprising:

under the action of a flow dividing control device, introducing the first part into a cooling interlayer to exchange heat with a turbine and then converging the second part with the supercritical carbon dioxide from a supercritical carbon dioxide storage device at an initial temperature of 35-55 ℃ to obtain converged gas;

an operator calculates an initial airflow ratio to be 1:3.14 according to the temperature of an air source (namely the temperature of initial supercritical carbon dioxide) and the wall surface temperature (namely the wall surface temperature of an initial turbine cylinder body), the flow ratio of split control gas is adjusted through the opening of a valve, the sensitivity of the valve is 1%, when the temperature of the converged gas measured by a temperature measuring component is higher than 120 ℃, the converged gas is fed back to a split control device, the flow ratio of a first part to a second part is reduced, and the flow ratio of the first part to the second part is 0.99: 3.15; when the temperature of the converged gas measured by the temperature measuring part is less than or equal to 120 ℃, feeding back the converged gas to the flow dividing control device, and increasing the flow ratio of the first part to the second part, wherein the flow ratio of the first part to the second part is 1.01: 3.13; and when the temperature of the converged gas measured by the temperature measuring part does not accord with the preset range of 115-125 ℃, starting the temperature control device to adjust the temperature to the preset range of 115-125 ℃, and then sending the converged gas into a dry gas sealing device for sealing.

The operation method of the turbine dry gas seal and cylinder cooling system device provided by the application example simultaneously realizes cooling of the turbine cylinder and heating of seal gas, wherein the starting times and duration of an electric heater in the temperature control device are obviously reduced, the temperature of the part, connected with the turbine cylinder and the dry gas seal, is controlled within the range of 160-230 ℃, the circulating efficiency of supercritical carbon dioxide is 40%, the power of the electric heater is 10kw, the circulating power generation power is 10MW, the power consumption of system plant power can be saved by 5-10 kw, the system efficiency is improved by 0.05-0.1%, the operation service life of the electric heater is 1-2 years, the price is 5-20 ten thousand, the operation life of the turbine is 30 years, the electric heater needs to be replaced 12-20 times within the original turbine life, and the electric heater only needs to be replaced 1-3 times within the operation life of the turbine after the device is adopted (due to the short operation time of the electric heater, the temperature of the seal and the seal system device is short in the embodiment, Low frequency and thus overall extended service life), and significantly reduced cost.

Application example 2

The present application example provides an operation method of the turbine dry gas seal and cylinder cooling system apparatus according to embodiment 2, where the operation method includes:

under the action of a flow dividing control device, introducing the first part into a cooling interlayer to exchange heat with a turbine and then converging the second part with the supercritical carbon dioxide from a supercritical carbon dioxide storage device with the initial temperature of 20-55 ℃ to obtain converged gas;

similarly, an operator calculates an initial gas flow ratio of 1:3.685 according to the temperature of a gas source (namely the temperature of initial supercritical carbon dioxide) and the wall temperature (namely the wall temperature of an initial turbine cylinder), the flow ratio of the flow splitting control gas is adjusted through the opening of a valve, the sensitivity of the valve is 1.5 percent, when the temperature of the merged gas measured by a temperature measuring component is more than 115 ℃, the merged gas is fed back to a flow splitting control device, the flow ratio of a first part to a second part is reduced, and the flow ratio of the first part to the second part is 0.985: 3.7; when the temperature of the merged gas measured by the temperature measuring part is less than or equal to 115 ℃, feeding back the merged gas to the flow dividing control device, and increasing the flow ratio of the first part to the second part, wherein the flow ratio of the first part to the second part is 1.015: 3.67; and when the temperature of the converged gas measured by the temperature measuring part does not accord with the preset range of 110-130 ℃, starting the temperature control device to adjust the temperature to the preset range of 110-130 ℃, and then sending the temperature to a dry gas sealing device for sealing.

The operation method of the turbine dry gas seal and cylinder cooling system device provided by the application example simultaneously realizes cooling of the turbine cylinder and heating of seal gas, wherein the starting times and duration of an electric heater in the temperature control device are obviously reduced, the power of the electric heater is 8kw, the circulating power generation power is 5MW, the power consumption of system service power can be saved by 5-10 kw, the system efficiency is improved by 0.1% -0.16%, the operation life of the electric heater is 1-2 years, the price is 3-18 ten thousand, the operation life of the turbine is 30 years, the electric heater needs to be replaced by 12-20 times in the original life of the turbine, and the device provided by the embodiment only needs to replace the electric heater by 1-3 times in the operation life of the turbine (due to the fact that the electric heater has short operation time and low frequency, the comprehensive service life is prolonged), and the cost is obviously reduced.

Application example 3

The present application provides a method of operating the turbine dry gas seal and cylinder cooling system apparatus of embodiment 3, the method comprising:

under the action of a flow dividing control device, introducing the first part into a cooling interlayer to exchange heat with a turbine and then converging the second part with the supercritical carbon dioxide from a supercritical carbon dioxide storage device with the initial temperature of 25-80 ℃ to obtain converged gas;

similarly, an operator calculates an initial airflow ratio to be 1:2.96 according to the temperature of an air source (namely the temperature of initial supercritical carbon dioxide) and the wall surface temperature (namely the wall surface temperature of an initial turbine cylinder body), the flow ratio of split control gas is adjusted through the opening of a valve, the sensitivity of the valve is 2%, when the temperature of the merged gas measured by a temperature measuring component is more than 125 ℃, the merged gas is fed back to a split control device, the flow ratio of a first part to a second part is reduced, and the flow ratio of the first part to the second part is 0.98: 2.98; when the temperature of the converged gas measured by the temperature measuring part is less than or equal to 125 ℃, feeding back the converged gas to the flow dividing control device, and increasing the flow ratio of the first part to the second part, wherein the flow ratio of the first part to the second part is 1.02: 2.94; and when the temperature of the converged gas measured by the temperature measuring part does not accord with the preset range of 115-130 ℃, starting the temperature control device to adjust the temperature to 125-130 ℃ in the preset range, and then sending the converged gas into a dry gas sealing device for sealing.

The operation method of the turbine dry gas sealing and cylinder cooling system device provided by the application example realizes cooling of the turbine cylinder and heating of the sealing gas at the same time, the starting times and duration of an electric heater in the temperature control device are obviously reduced, the power of the electric heater is 200kw, the circulating power generation power is 100MW, the power consumption of system station power can be saved by 150-200 kw, the system efficiency is improved by 0.15% -0.2%, the service life of the electric heater is 1-2 years, the price is 200-300 million, the service life of a turbine is 30 years, the electric heater needs to be replaced by 12-20 times in the original service life of the turbine, after the device is adopted, only the heat exchanger needs to be replaced by 1-3 times in the service life (the whole service life is prolonged because the operation time of the electric heater is short and the frequency is low), and the cost reduction effect is more obvious for a high-power turbine unit.

Application example 4

This application provides a method of operating the turbine dry gas seal and cylinder cooling system apparatus described in example 4, with the remaining parameters being performed with reference to application example 1.

The operation method of the turbine dry gas seal and cylinder cooling system device provided by the application example simultaneously realizes cooling of the turbine cylinder and heating of seal gas, wherein the starting times and duration of an electric heater in the temperature control device are obviously reduced, but the cooling effect of the turbine cylinder is relatively poor due to the fact that no reinforced heat transfer part is arranged, the temperature of the turbine cylinder is controlled within the range of 200-220 ℃, the power of the electric heater is 10kw, the circulating power generation power is 10MW, the power consumption of system service electricity can be saved by 5-8 kw, the system efficiency is improved by 0.05% -0.08%, and the integral service life of the electric heater is obviously prolonged.

Application comparative example 1

The application comparative example provides an operation method of the turbine dry gas sealing and cylinder cooling system device in the comparative example 1, the specific steps are similar to the application example 1, and the specific steps comprise:

under the action of a flow dividing control device, introducing the first part into a cooling interlayer to exchange heat with a turbine and then converging the second part with the supercritical carbon dioxide from a supercritical carbon dioxide storage device at an initial temperature of 35-55 ℃ to obtain converged gas;

when the temperature of the merged gas measured by the temperature measuring part is higher than 120 ℃, the merged gas is fed back to the flow dividing control device, the flow ratio of the first part to the second part is reduced, and the flow ratio of the first part to the second part is 0.99: 3.15; when the temperature of the converged gas measured by the temperature measuring part is less than or equal to 120 ℃, feeding back the converged gas to the flow dividing control device, and increasing the flow ratio of the first part to the second part, wherein the flow ratio of the first part to the second part is 1.01: 3.13; and feeding the merged gas into a dry gas sealing device for sealing.

Although the operation method of the turbine dry gas seal and cylinder cooling system device provided by the application comparative example can realize cooling of the turbine cylinder and heating of the seal gas at the same time, when the temperature of the turbine cylinder is too low, the temperature of the seal gas is difficult to control in a reasonable range in time, the deviation between the power consumption of the system plant power and the circulation efficiency of the supercritical carbon dioxide and the application example 1 is very small, specifically less than 0.005%, but the fluctuation of the temperature range of the converged gas is large and is 50-150 ℃.

Comparative application example 2

The application comparative example provides an operation method of the turbine dry gas sealing and cylinder cooling system device of the comparative example 2, which specifically comprises the following steps:

and introducing the supercritical carbon dioxide with the initial temperature of 35-55 ℃ into a temperature control device from a supercritical carbon dioxide storage device, starting the temperature control device to adjust the temperature to 115-125 ℃ within the preset range when the temperature of the supercritical carbon dioxide measured by a temperature measuring part does not accord with the preset range of 115-125 ℃, and then sending the supercritical carbon dioxide into a dry gas sealing device for sealing.

The operation method of the turbine dry gas seal and cylinder cooling system device provided by the application example is difficult to realize cooling of the turbine cylinder and heating of seal gas at the same time, and only can realize heating of the seal gas, wherein an electric heater in a temperature control device needs to be started all the time, the circulating efficiency of supercritical carbon dioxide is 40%, the power of the electric heater is 10kw, the circulating power generation power is 10MW, the service life of the electric heater is 1-2 years, the price is 5-20 ten thousands, the operation life of the turbine is 30 years, and the electric heater needs to be replaced for 12-20 times within the service life of the turbine.

In conclusion, the turbine dry gas sealing and cylinder cooling system device and the operation method provided by the invention have the advantages that the service life of the temperature control device is obviously prolonged, the power consumption of the system service power can be reduced, the system efficiency is improved by 0.05-0.3%, 11-17 electric heaters can be saved in the turbine operation life, the cost is obviously reduced, and the economic benefit is obvious.

The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.