BRPI0520522B1 - mixed device to standardize a fluid. - Google Patents

Abstract

mixed device for standardizing a fluid and mixed fluid delivery system. providing for a mixed fluid supply system (1) is provided to provide a mixed fluid in yet another uniform mixed condition; the mixed fluid supply system (1 includes: mixed gas pipe (4) with secondary gas pipe to supply primary gas pipe with a secondary gas to mix secondary gas into a primary gas, and a uniformity device of the mixed fluid (6) located in the mixed gas piping (4); the equalizing device (6) includes a stationary perforated plate (8) and movable perforated plate (9) which are superposed on each other and a cylinder (11) to move the movable perforated plate (9) in its plane relative to the stationary perforated plate (8), the perforated plates (8) and (9) are each formed with many perforations (10), with (d movement of the movable perforated plate (8), a degree of overlap between the perforations (10) of a perforated plate and the perforations (10) of the other perforated plate changes to vary an open area proportion of the perforations (10) all together.

Description

Technical Field [01] The present invention relates to a mixed fluid uniformizer device and mixed fluid delivery system. More specifically, the invention relates to mixed fluid uniformity device and mixed fluid delivery system comprising plural fluids to further increase the degree of mixing of the mixed fluid and a mixed fluid supply system with this mixed fluid uniformizer device.

Background Art [02] In the field of iron production, for example, the production of pig iron by the blast furnace process allows blast furnace gas (hereinafter referred to as "BFG") having a relatively low calorie to be developed. as a (low calorie) blast furnace by-product gas. BFG is used for various purposes when working with iron. These low calorie by-products gases include not only blast furnace gas but also other gases such as converter gas (LDG) and coal mine gas (CMG) and the mixture of these gases. On the other hand, new iron production processes (eg direct iron reduction processes including FINEX and COREX) other than the blast furnace process are being developed. For this reason, a combustion method that is applicable even for the efficient use of by-products gases produced by such processes is expected to be developed.

[03] With any iron production process, the byproduct gas produced in this way has properties (including gas and calorie composition) that depend on the system used and the contents of the operation. Even with the same system, the properties of the by-product gas float moment by moment according to the properties of the raw materials and the reaction process and so are not constant. When using byproduct gas as a fuel for a combustion system such as a gas turbine, for example, a calorie reduction gas needs to be mixed into the byproduct gas to prevent the floating calorific value of the byproduct gas from exceeding the upper limit. of the variation of the allowed calorific value which is characteristic of the gas turbine, thus avoiding an excessive increase in the combustion temperature in the gas turbine combustor. On the other hand a calorie increasing gas has to be mixed into the byproduct gas in order to prevent the fluctuating calorific value of the byproduct gas from falling from the lower limit of the allowable calorific value, thus preventing a flame from occurring outside the combustion turbine combustor. gas. Moreover, the mixed gas resulting from the mixing of a primary gas (BFG, for example) with calorie reduction or gas elevation (hereinafter referred to as "secondary gas" as appropriate) must be sufficiently uniform over a pipe cross-section. of fuel supply. That is, the primary and secondary gas must be sufficiently mixed.

[04] If the mixed gas is not uniform over the pipe cross section, it is possible that this non-uniform portion of the mixed gas, as shown, reaches the plural combustors presented in the gas turbine combustion chamber, thus causing the plural combustors. to burn the gas in a non-uniform combustion condition.

[05] Even in the plurality of flammable gas mixture types that are different in properties (eg in the mixture of BFG with LDG or CMG) for use of the resulting mixed gas as a fuel, not for the purposes of reducing or increasing average calorie, a sufficient mixture of these gases is required.

[06] Conventionally, for example, a mixer having a stationary blade for stirring gas in a gas flow passage has been used to uniformly mix gases that are different in properties, including calories from one another (see document). 1 of the patent, for example). The purpose of this mixer is to achieve a predetermined mixing condition by all variations of respective primary gas flow rates and total calorie and a different type of gas to be mixed as the secondary gas in the primary gas. The mixer is designed to suit the mixing conditions including: 1 the flow rate, specific gravity and composition of the primary gas; 2 specific gravity and composition of the secondary gas to be mixed in the primary gas; and (3) the variation of the mixing ratio between primary and secondary gas.

[07] The ratio of mixture between kidney gas and secondary gas previously determined based on a target value of an increase in the calorific and caloric values of the respective primary and secondary gases. For this reason, when the secondary gas that was originally intended to be used is replaced with another type of calorie lift gas, or when the mixing ratio between the primary gas and the secondary gas needs to be modified largely due to a change in value. For the primary gas calorific gas, it is very difficult for the conventional mixer to ensure that the uniformity in the mixture is within a predetermined range of mixing offset over a fuel supply pipe cross section located below the mixer.

[08] When the calorie of a by-product gas having a caloric value of 800 cal / Nm3 shall be increased to 1,000 cal / Nm3 by the use of any coke oven gas (COG) having a calorific value of 4,000 cal / Nm3. , the converter tank gas (LDG) having a calorific value of 2,000 cal / Nm3 and natural gas (NG) having a calorific vapor of 9,000 cal / Nm3, which may be selected as calorie increasing gases, the mixing ratio from calorie-boosting gas to primary gas (ie the by-product gas mentioned above) differs depending on which calorie-raising gases are used. For example, the mixing ratios of the respective COG, LDG and NG to the primary gas are 0.05: 1, 0.1: 1 and 0.022: 1, respectively. When LDg or NG is used as a COG substitute due to a reduction in COG supply as a calorie boosting gas, the conventional mixer designed specifically for COG cannot sufficiently achieve a uniform mixing effect because the proportion This substitute gas's mixing ratio is very different from the COG's mixing ratio. Note that KDG, having a relatively low calorie as noted above, can be used when the primary gas is a gas having a lower calorie as BFG.

[09] Even when the ratio of secondary gas to primary gas mixing is constant, the gas flow pattern within the mixer changes due to the change in primary gas flow rate. For this reason, even when the secondary gas to be mixed is a single type of gas, it is difficult for the conventional mixer to ensure a predetermined uniformity over a wide range of change in primary gas flow rate.

Patent Document 1; Japanese Patent Publication No. HEI 10-337458 Disclosure of the Invention Problem to be solved by the Invention The present invention has been made in order to solve the following problems. Accordingly, it is an object of the present invention to provide a mixed fluid uniformity device for improving mixing uniformity by suitability of various mixing conditions, including different flow rates and compositions of a mixed fluid, thereby improving uniformity of the mixed fluid without regard to whether the conventional mixer is presented or not (i.e. independent of the mixer) as well as a mixed fluid supply system featuring a mixed fluid uniformity device.

Means for Solving the Problem The present invention provides a mixed fluid uniformity device comprising plurality of perforated plates superimposed on each other in a displaceable manner in a fluid flow passage where: each perforated plate is formed with plural perforations; and with relative displacement of plural perforated plates in their respective planes as they overlap face to face with one another, a degree of area almost overlaps between the perforations of one perforated plate and the perforations of another perforated plate change to vary a proportion. open area of all perforations together.

With this arrangement, a secondary fluid is mixed into a primary fluid to adjust the properties of the primary fluid in an upward location of the perforated plates causing fluid flow resistance, and then the resulting mixed fluid is further mixed shortly thereafter. pass fluid through the perforations. As a result, mixing is accelerated and thus uniformity of mixing is accelerated. In addition, it is possible to adjust the proportion of the open area of the perforations to the mixing conditions, so as to select an optimal open area ratio for the current mixing conditions.

The mixed fluid uniformity device may further comprise a perforated plate movable device located outside the flow passage for moving the perforated plates, where: the plurality perforated plates include a stationary perforated plate within the flow passage and an unfixed movable perforated plate; and the mobile device of the perforated plate is configured to correspond to the mobile perforated plate.

[016] With this arrangement, it is sufficient that only the movable perforated plate is moved. The stationary perforated plate assists in the direction of the movable perforated plate.

Preferably, when the open area ratio of the all-joint perforations is maximum, the all-joint perforations have an open area that is equal to or larger than the cross-sectional area of the flow passage. This feature can reduce the flow resistance of the flow pass to the maximum.

[018] Perforated plates may be inclined with respect to a direction perpendicular to a central axis of the flow passage. In this case, the perforated plates have a larger real area, while the perforations all together have a larger open area. Thus, the flow resistance of the flow passage can be reduced to the maximum.

It is possible that the stationary perforated plate has a movement guide member engaged as opposed to the side portions of the movable perforated plate which are situated in a perpendicular direction for the direction of movement of the movable perforated plate.

It is possible that: a movable perforated plate is interposed between two stationary perforated plates between which a spacer is interposed to maintain a gap between them to allow the movable perforated plate to slide between the two stationary perforated plates; and the two stationary perforated plates and the spacer are capable of performing a moving direction function of the movable perforated plate.

[021] This feature allows the movable perforated plate to be guided by the stationary perforated plates positioned in front and behind the movable perforated plate, for example, thereby reducing the thickness and weight of the movable perforated plate to thereby operate the plate. perforated mobile faster.

Each of the perforations may have an elongated shape extending in a direction perpendicular to a moving direction of the movable perforated plate. With this feature, the perforations of each perforated plate can have a relatively high open area ratio and thus the open area of the perforations in a full open condition can be increased.

Preferably, the mixed fluid standardizing device further comprises a cleaning device located within the flow passage to clean the perforations, the cleaning device having plural nozzles for vaporizing a cleaning liquid. This feature makes it possible to clean perforated plates without requiring an operator to enter the flow path or at a significantly reduced frequency of operator input.

[024] Perforated plates can be configured so that they can close all perforations by moving the movable perforated plate.

Another mixed fluid standardization device according to the present invention comprises a perforated plate made of many perforations and located within a fluid flow passage, the perforated plate being able to rotate in any angular position on a line. would imagine in a plane of the perforated plate through a center of the perforated plate.

[026] This arrangement can also accelerate mixing of a mixed fluid. Further, in the event that fluid flow in the flow passage is urgently interrupted at a downward location of the device for effecting excessive pressure fluctuations to propagate towards the upward side, the propagation of these pressure fluctuations towards the upward side may being suppressed because the rotating perforated plate can increase the resistance of the flow passage to the fluid flow by rotating in this direction to close the flow passage.

[027] The perforated plate may be configured to enable rotation between a full open position where the plane of the perforated plate extends along a central axis of the flow passage and a fully closed position where the perforated plate closes. the passage of the flow. The "fully closed position in which the perforated plate closes the flow passage" means a position in which the perforated plate, if not formed with any perforation, would block the flow of fluid in the passage. The "fully closed position" does not mean a position in which the perforated plate actually blocks fluid flow completely.

A mixed fluid delivery system according to the present invention comprises: a flow passage allowing a fluid to pass therethrough; and a mixed fluid equalizer located in the flow passage, wherein: the mixed fluid equalizer is any of the mixed fluid equalizers described above; and a portion of said flow passage that accommodates the mixed fluid uniformity device therein has a cross-sectional area other than the other portions of the flow passage which are upward and downward, respectively, from the anterior portion.

[029] In this mixed fluid supply system, the perforated plates have a larger actual area while the all-perforations have a larger open area. Thus, the resistance of the flow passage can be reduced to the maximum.

Another mixed fluid delivery system according to the present invention comprises: a flow passage allowing a fluid to pass therethrough; and a mixed fluid equalizer located in the flow passage, wherein: the mixed fluid equalizer is any of the mixed fluid equalizers described above; and a portion of the flow passage accommodating the uniformity device therein has a downward cross-sectional area and an upward cross-sectional area of the mixed fluid uniformizer; the cross-sectional area on the downward side being greater than the cross-sectional area on the downward side.

[031] This arrangement is expected to have a more intensified mixing effect because the mixed fluid expands and diffuses immediately upon passage through the uniformity device.

Another mixed fluid delivery system according to the present invention comprises: a flow passage allowing a fluid to pass therethrough; and a mixed fluid equalizer located in the flow passage, wherein: the mixed fluid equalizer is any of the mixed fluid equalizers described above; and a flow passage further has a gas detector device downstream of the mixed fluid uniformity device for detecting a gas property, the gas property detection device being configured to detect a gas component distribution over a cross section of the fluid passage.

[033] With this mixed fluid delivery system it is possible to select an appropriate open area ratio for perforated plate perforations to improve mixing uniformity by adjusting the open area proportion of perforations according to a mixed condition of one perforation. mixed gas detected by a gas property detection device. The gas property sensing device may comprise a calorie sensing device, for example.

Advantage of the Invention The present invention makes it possible to improve mixing uniformity under a wide variety of mixing conditions, to improve mixing uniformity of a mixing fluid even when a primary fluid and a secondary fluid are mixed, modified in their respective flow rates and compositions.

BRIEF DESCRIPTION OF THE DRAWINGS [035] The present disclosure will be described based on the figures below, in which: [036] Figure 1 is a piping diagram schematically illustrating a mixed fluid delivery system including a fluid equalizing device. mixed according to one embodiment of the present invention.

Figure 2 is a vertical sectional view schematically showing a configuration of the mixed fluid uniformity device included in the mixed fluid delivery system shown in Figure 1.

Figure 3a is a front elevational view schematically showing another embodiment of the mixed fluid uniformity device included in the mixed fluid delivery system shown in Figure 1.

Figure 3b is a sectional side elevational partial view of the mixed fluid uniformity device shown in Figure 3A.

Figure 4 is a perspective view showing yet another embodiment of the mixed fluid uniformity device included in the mixed fluid delivery system shown in Figure 1.

[041] Figure 5 is a sectional view taken on line V-V of figure 4.

Figure 6 is a vertical sectional view showing yet another configuration of the mixed fluid uniformizer included in the mixed fluid delivery system shown in Figure 1.

Figures 7a, 7b and 7c are each a fragmentary sectional view showing perforated plates of the mixed fluid equalizer shown in Figure 6.

Figure 8 is a perspective view showing the perforated plates of the mixed fluid uniformizer shown in Figure 6.

[9] Figure 9 is a sectional view taken on line IX-IX of figure 8.

Figure 10 is a vertical sectional view schematically showing yet another configuration of the mixed fluid uniformizer included in the mixed fluid delivery system shown in Figure 1.

Figure 11 is a partially sectional perspective view of the mixed fluid equalizer shown in Figure 10.

[048] Figure 12 is a sectional view taken on line XII-XII of figure 10.

Figure 13 is a vertical sectional view schematically showing yet another embodiment of the mixed fluid uniformity device included in the mixed fluid delivery system shown in Figure 1.

Figure 14 is a vertical sectional view schematically showing yet another embodiment of the mixed fluid uniformity device included in the mixed fluid delivery system shown in Figure 1.

Figure 15 is a vertical sectional view schematically showing yet another embodiment of the mixed fluid uniformity device included in the mixed fluid delivery system shown in Figure 1.

Figure 16 is a perspective view showing a configuration of a perforated plate of the mixed fluid equalizer shown in Figure 15.

[053] Figure 17 is a perspective view showing a perforated plate configuration of the mixed fluid equalizer shown in Figure 15.

Description of Reference Characters 1 .. .mixed fluid supply system 2 ... primary gas pipe 3 ... secondary gas pipe 4 ... mixed gas pipe 5 .. .mixing point 6 ... standardization device (mixed fluid) 7 ... uniformity detector device 8 .. .. stationary perforated plate 9 .. .. movable perforated plate 10 .. .. drilling 11 ... steering rod 12 .. connection rod 13 .. sealing mechanism 14 ... guide member 15 .. .spacer 16 ... standardization device (fixed fluid) 17 ... cleaning device 18 ... cleaner supply pipe 19 .. .vaporizer 20 .. .borehole 21 ... mixed gas pipe 22 .. .punching perforated plate 23 .. .pipe 24 .. .punching perforated plate 25 ...piling shaft 26 ... uniformization device (mixed fluid) 27 .. .flange joint 28 .. . interrupt plug 29 .. .off valve 30 ... control device 31 ... oil controller 32 ... position sensing device 33 ... liquid collecting slot 34 .. drainage hole C ... combustion system 5 .. gas supply source Best Mode for Carrying Out the Invention [ Hereinafter, a mixed fluid uniformity device and a mixed fluid delivery system thereof in accordance with one embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 1 illustrates a mixed fluid delivery system 1 as a configuration of the present invention. Supply system 1 is configured to provide a gas turbine with a fuel comprising a byproduct gas having a floating calorie that is produced by a gas supply source S such as a blast furnace or a direct iron reduction system. Examples of such supply systems include: a fuel gas supply system of the type configured to mix by-product gas types that are different in properties from each other and provide the resulting mixed gas; and a fuel gas supply system of the type configured to mix this fuel gas with a calorie reducing gas comprising an inert gas or a calorie increasing gas comprising COG or the like and providing the resulting mixed gas. The above-mentioned gas source incorporates a mechanism for performing a treatment process, such as a dust filtration process, required for a gas produced to be supplied as a fuel. Fluids that may be supplied by the mixed fluid delivery system of the present invention include liquids, powders, pasty cement and the like without gas limitation. In the following configuration, gas is used as a fluid for illustration.

[056] Mixed fluid supply system 1 includes: primary gas piping 2 for supplying a primary gas produced by gas supply source S; secondary gas pipe 3 connected to primary gas pipe 2 for mixing a calorie reducing or reducing gas; mixed gas line 4 extending downwardly to joint 5 between line 2 and line 3 (hereinafter referred to as "mixing point" as appropriate) to provide a mixed gas comprising primary and secondary gas; and a mixed fluid uniformity device (referred to herein as the "uniformization device" simply as the case may be) located in the mixed gas pipe 4. The secondary gas pipe 3 supplies the secondary gas in order to stabilize the fluctuating properties of the primary gas (including fluctuating calories, for example).

[057] In cases where the gas uniformly mixed by the uniformizer 6 is a combustible gas C as a gas turbine combustor. Each of the pipes 2, pipe 3 and pipe 4 may comprise a pipe having an elliptical and polygonal cross-sectional shape without limitation to a circular cross-sectional shape. The aforementioned secondary gas pipe 3 may be this pipe to feed two or more types of secondary gases to the same mixing point 5 and to mix these gases with the primary gas at the same time or this pipe to comprise many secondary gas pipe lines. which are connected to primary gas piping 2 at different points.

[058] Mixed gas piping 4 may be presented with a gas property sensing device 7 at a location downstream from the uniformising device 6 to detect the degree of uniformity of mixed gas gas flowing in mixed gas piping 4.

Figure 2 shows the smoothing device 6. The smoothing device 6 includes two perforated plates 8 and 9. Each of the perforated plates 8 and 9 is formed with multiple perforations 10. Although there is no limitation with respect to diameter of each perforation 10 or height with which perforations 10 are arranged, perforations 10 preferably have equal diameter and are arranged with equal height, but the proportion of open area of these perforations 10 can be easily adjusted. A perforated plate 8 has a shape that extends tightly to fit the flow passage of the mixed gas pipe 4 (otherwise stated, a way to close the flow passage of the mixed gas pipe 4 if the plate has no perforation) and has a periphery attached to an inner surface of the pipe forming the mixed gas pipe 4. Thus, the perforated plate 8 will be referred to as "stationary perforated plate 8". The shape of the stationary perforated plate 8 is adapted to a sectioned flow passage shape of the mixed gas pipe 4. The other perforated plate 9 is positioned in contact with the upward side face of the stationary perforated plate 8 so that it can alternate in its plane. Thus, perforated plate 9 will be referred to as "movable perforated plate 9".

The movable perforated plate 9 has an end portion connected to a movable perforated plate device comprising a steering cylinder 11 as a hydraulic cylinder, located outside the mixed gas pipe 4. The movable perforated plate 9 is matched by the 11. A connecting rod 12 interconnecting a rod 11a of the steering cylinder 11 and the movable perforated plate 9 extends through the wall of the mixed gas pipe 4. The portion of the pipe wall 4 through which the rod 12 extends, is provided with a sealing mechanism 13. The movable perforated plate 9 may be positioned on a downward side of the stationary perforated plate 8 without limitation to the rising side of the stationary perforated plate 8. The perforated plate mobile device may comprise an electric motor or the like without limitation to the hydraulic cylinder.

[061] Hydraulic cylinder 11 may be located above the mixed gas pipe 4 to lift and lower the movable perforated plate 9 in a suspended condition, without limitation to the location below the mixed gas pipe 4 as shown. Alternatively, the steering cylinder 11 may flank the mixed gas pipe 4 to horizontally correspond to the movable perforated plate 9. The cylinder 11 may be positioned anywhere between the locations above and below the mixed gas pipe 4.

[062] The portion of the mixed gas pipe 4 accommodating the aforementioned uniformizing device 6 may be configured to be removable from the mixed gas pipe 4. For example, it is possible that the pipe forming the mixed gas pipe 4 is cut into the front and rear portions of the smoothing device 6 and the resulting jagged portion is connected to the front and rear portions of the mixed gas pipe 4 through the pipe joints such as the flanges. When the flange joining rivets are removed, the tubing section accommodating the smoothing device 6 can be moved externally together with the steering cylinder 11 and the like. In doing so, maintenance of the smoothing device 6 can easily be conducted during periodic inspection of the system.

In each of the perforated plates 8 and 9, the perforations 10 are formed to have a central distance equal to or greater than the diameter of each perforation 10. With the perforations 10 thus formed, the perforated plates 8 and 9 may take a desired position (i.e. a desired open area ratio) between a total open position where all perforations 10 of a perforated plate coincide with the corresponding perforations of the other perforated plates to have a 100% open area ratio. and a fully closed position wherein either of the perforations 10 of one perforated plate does not overlap the corresponding perforation of the other perforated plate at all to have a 0% open area ratio when the movable perforated plate 9 stops at a desired position as a result of their reciprocity about predetermined distance. This feature will be apparent from figures 7 (a) and 7 (c) showing a smoothing device 16 having three perforated plates to be further described. In order for the movable perforated plate 9 to be movable for a predetermined distance, the movable perforated plate 9 has a smaller external size than the stationary perforated plate 8.

[064] A maximum open area ratio is not particularly limited to a 100% open area ratio where the total area of perforations 10 is open. For example, a maximum aperture condition may be a condition where 100% of the total perforation area is not reached. A minimum open area is not particularly limited to a proportion of 0% open area where the total area of perforations 10 is closed. For example, a minimum open condition may be in a condition where an open area ratio slightly exceeds 0% of the total perforation area (ie a slightly open condition). With these configurations, the center distance of the perforations 10 need not be greater than the diameter of each perforation 10.

[065] The purpose of the above described arrangement capable of modifying the open area ratio of perforated plates 8 and 9 is to allow optimal mixing to be performed under the mixing conditions to mix primary and secondary gas by modifying the ratio. open area to suit mixing conditions. Perforated plates 8 and 9 first block a portion of the mixed gas fed to the perforated plates 8 and 9 through the mixed gas pipe 4 to produce flow components perpendicular to the central axis of the pipe. The mixed gas is further mixed through this action. The mixed gas traversing the perforated plates 8 and 9 produces diffusion endpoints through the jets of the perforations 10 toward the downward side, thereby performing more uniform mixing; Through this mechanism, mixing of the mixed gas further proceeds to achieve uniform mixing.

The aforementioned uniformity sensing device 7, descending from uniformizing device 6 may comprise a calorie sensing device configured to detect a gas calorie distribution over a cross section of the gas flow passageway. 4. In order for the uniformity sensing device 7 to serve the purpose, the multiple sensing sections 7a of the calorie sensing device simply need to be arranged substantially over a cross-section of the passageway. Multiple detection sections 7a may be arranged in many cross sections as shown without limitation to a single cross section.

[067] Examples of this calorie detection device 7 used herein include the so-called calorimeter for directly measuring the calorie of gas, a device for measuring the content (density) of a flammable component and other types of devices. In cases where detection speed is important, it is preferable to use a flammable gas density sensing device (gas component sensing device). According to a contained main flammable component and a low calorie gas, or the type of flammable component that generates a higher density fluctuation (eg carbon monoxide between the byproducts gases produced by the direct iron reduction process), a density sensing device for detecting the density of this component that can be used. The degree of uniformity sensing device is not limited to these calorie sensing devices. Various devices suitable for detecting gas properties may be employed including, for example, a density sensing device for detecting a gas distribution over a cross section of the gas flow passage.

[068] A suitable open area ratio for improving uniform mixing may be selected by adjusting the open area ratio of the perforations 10 of the perforated plates 8 and 9 above according to the mixed gas mixed condition detected by the sensing device 7. The smoothing device 6 is provided with a control device 30 for realizing this suitable open area ratio, an oil controller 31 for adjusting the cylinder rod time 11a by controlling the amount of hydraulic oil to be supplied to the cylinder. 11 and a position sensing device 32 for detecting the expanded / retracted position of the cylinder rod 11a.

[069] Control device 30 has stored a table relating a ratio of mixing of each of the secondary gases (ratio of volume of secondary gas to primary gas) to an optimal ratio of corresponding open area of perforated plates to the types of secondary gases. used as parameters. Further, control device 30 has stored positions that can be taken by a detected portion of the cylinder rod 11a as the movable perforated plate 9 moves from the fully open position as a reference position to a fully closed position, as well as the quantities required. of hydraulic oil to the movable perforated plate 9 to move between the fully open position and the fully closed position.

[070] Control device 30 selects the calorie reduction gas to prevent the measured caloric value of the primary gas from exceeding the maximum allowable limit value established for the combustion system and at the same time calculating a required amount of mixture of the calorie reduction gas, based on which the control device 30 provides a mixture amount instruction to a secondary gas supply system (not shown). Alternatively, the control device 30 selects the calorie boosting gas to prevent the measured caloric value of the primary gas from falling below the minimum allowable limit set for the combustion system and at the same time calculating a required amount of mixture. of calorie increasing gas, on the basis of which the control device 30 provides a mixture amount instruction to a secondary gas supply system. In cases where the many types of calorie raising gases and many types of calorie reducing gases are presented, the control device 30 selects a suitable gas according to a predetermined criterion and calculates a required amount of gas mixture. selected.

Subsequently, the control device 30 reads the open area ratio of the perforated plates corresponding to a ratio of secondary gas to primary gas mixing in the table, calculates a movement of the movable perforated plate 9 based on the read value, and controls the supply hydraulic oil to the cylinder to achieve the target open area ratio of the perforated plates. When the secondary gas mixing ratio is relatively low, for example, an action such as lowering the open area ratio, or a similar action, is taken. The measurement cycle of the separation between the calorific value and the target calorific value of the mixed gas is preferably longer than the calorific value detection time.

[072] In cases where the degree of uniformity of the gas mixed at a descending location of the uniformity device 6 through the uniformity detection device 7, it is possible to perform a return control by returning the detected value. In this case, if the system may become unstable due to frequent adjustment to the movable perforated plate, the uniformity sensing device 7 may be used primarily as a means of monitoring the uniformity.

[073] The portion of the mixed gas piping 4 accommodating the uniformity sensing device 7 may be configured to be removable from the mixed gas piping 4. This removable configuration may be accomplished by using a piping joint. , such as flanges, such as the removable configuration of the aforementioned smoothing device 6. This removable configuration allows the maintenance and calibration of the uniformity sensing device 7 to be easily achieved.

[074] Each of the perforations 10 can be created in the shape of an ellipse, a polygon, including square or rectangle, or any shape without limiting to a circle. The elongated perforations 20 as shown in figure 3 may also be employed. These elongated perforations 20 extend perpendicular to the direction of movement of the movable perforated plate 9 and are separated from each other in the direction of movement. Preferably, the perforations 20 are equally spaced from each other. Although figure 3a shows the perforations 20 of the movable perforated plate 9 only, it needless to say that the movable perforated plate 8 is formed with many perforations which are each equal in size and shape to a corresponding perforation 20. Since the area of each perforated plate is invariable, the provision of these elongated perforations 20 is more preferable than the provision of multiple circular or square perforations 10, because the perforated plates have a larger open area when in the fully open position.

[075] If mixed gas pipe 4 has a constant pipe inside diameter along its longitudinal axis, the open area of perforated plates 8 and 9 is smaller than the cross-sectional area of the flow defined by the pipe. mixed gas 4 even when the open area ratio of perforated plates 8 and 9 is 100%. However, the perforated plates 8 and 9, when in the fully open position, preferably have the largest open area possible for reduction in pressure loss. For this purpose, the portion of the mixed gas pipeline 4 accommodating the uniformizing device 6 defines a flow-through having a cross-sectional area larger than the upward and downward extending portions of that portion, as shown in Figure 2. That is, the mixed gas pipe 4 according to the present embodiment has a circular cross-section and, therefore, the portion of the mixed gas pipe 4 which accommodates the smoothing device 6 has a larger pipe diameter. As a result, the perforated plates 8 and 9, while in the fully open position. Accordingly, the perforated plates 8 and 9, when in the fully open position, have an enlarged open area which may be equal to or greater than the cross-sectional flow area of each ascending side portion and descending side portion of the gas pipe. mixed 4.

While the widened diameter portion of the mixed gas pipeline 4 has a diameter equal to the portions located before and behind the smoothing device 6, according to the present embodiment, there is no limitation to this structure. Optionally, the portion of the mixed gas supply line 4 which is located immediately behind (descending) of the smoothing device 6 may have a larger pipe diameter than the portion of the mixed gas supply line 4 which is located immediately before ( This structure causes the mixed gas to expand and diffuse immediately after passing through the uniformization device 6 so that the mixing effect can be improved.

The open area of perforated plates 8 and 9 can be further increased by shaping perforated plates 8 and 9 so that perforated plates 8 and 9 can be positioned as inclined with respect to a plane perpendicular to the central axis of the pipe. When the perforated plates 8 and 9 receive (elliptical) shapes so that the perforated plates 8 and 9 in an extended inclined position fit closely into the flow passage of the mixed gas pipe 4 , the actual area of each perforated plate can be increased to have a greater number of perforations 10. Assuming that perforations 10 having the same size and shape are formed at an equal height on each perforated plate and perforated plates 8 and 9 are tilted at an angle of Θ relative to the plane perpendicular to the central axis of the mixed gas pipe 4, the actual area of the perforated plates is increased 1 / cos Θ times and therefore the number of pe The number of holes 10 is increased by about 1 / cos Θ times. This applies to the entire open area of the perforated plates.

In this case, each of the perforations 10 of perforated plates 8 and 9 preferably extend through the perforated plate along the central axis of the mixed gas pipe 4 (in the direction of fluid flow) as shown in the figure. 2, because the flow resistance of the perforated plates 8 and 9 are formed to extend across the perforated plate in an inclined direction relative to the direction perpendicular to the plane of the perforated plate and thus the machining cost will increase in the case where a Reduction in machining cost is important, the perforations 10 of each of the perforated plates 8 and 9 may be formed to extend across the perforated plate in the direction perpendicular to the plane of the perforated plate.

As shown in figures 4 and 5, the movable perforated plate 8 is presented with a guide member 14 for directing the movement of the movable perforated plate 9. The guide member 14 comprises a pair of members having an L-shaped section which are mounted on the side of the movable perforated plate 8 facing the movable perforated plate 9 at opposite side portions (i.e. opposite end portions located in directions perpendicular to the direction of movement of the movable perforated plate 9). Guide member 14 and movable perforated plate 8 engage between opposite side portions of movable perforated plate 9 to guide the sliding of movable perforated plate 9. In Figure 4, movable perforated plate 8 and movable perforated plate 9 they are presented with their respective planes vertically positioned, that is, perpendicular to the central axis of the mixed gas pipe 4.

[080] In the smoothing device in Figure 4, the steering cylinder 11 is connected to an upper portion of the movable perforated plate 9 in order to move the movable perforated plate 9 in a suspended condition from the steering cylinder 11. The connecting portion between the steering cylinder rod 11a and the movable perforated plate 9 is shown in detail in Figure 4. The connecting rod 12 is attached to the movable perforated plate 9 and connected to the cylinder rod 11a by a pin connection. The connection mechanism shown is for illustration only and should not be construed to exclude any other connection mechanism. The sealing mechanism 13 is not shown in figure 4.

Figures 6 to 9 show a smoothing device 16 comprising three perforated plates. Specifically, the smoothing device 16 comprises two stationary perforated plates 8 positioned in parallel with each other, spaced apart by spacers 15 therebetween and a single movable perforated plate 9 between the two stationary perforated plates 8.0. stationary perforations 8 is substantially equal to the thickness of the movable perforated plate 9. As with the foregoing uniformising device 6, between the triple plates 8, 9, the perforations 10 of a perforated plate have the same size, shape and arrangement as perforations 10 of a perforated plate. another perforated plate. It is possible that the stationary perforated plates 8 are positioned such that the perforations 10 of one stationary perforated plate 8 are facing the corresponding corresponding perforations 10 of the other as shown. With this feature, when the smoothing device 16 assumes its full open position as a result of the movement of the movable perforated plate 9, the perforations 10 of the movable perforated plate 9 completely coincide with the perforations 10 of the stationary perforated plates 8 as shown. in figure 7a, so that the proportion of the open area of the perforations 10 reaches 100%. By moving the movable perforated plate 9 from the full open position by a distance equal to the diameter d of each perforation 10, all perforations 10 are fully closed (Figure 7c) so that the proportion of open area reaches 0%. Figure 7b shows a state in a proportion of the intermediate open area.

As shown in Figures 8 and 9, the spacers 15 are located between the two stationary perforated plates 8 on opposite sides and separated by a distance substantially equal to the width of the movable perforated plate 9. With this structure, the spacers 15 and the two stationary perforated plates 8 act as a guide member for directing the movement of the movable perforated plate 9.

As the two sides of the movable perforated plate 9 are held between the two stationary perforated plates 8, the thickness of the movable perforated plate 9 can be reduced without any danger of bending. As a result, it is possible to reduce the weight of the perforated plate, simplify the steering mechanism and improve accuracy by establishing open area proportions.

[084] The arrangement of perforations is not limited to a grid pattern as described above (see figures 4 and 8) or a vertical arrangement of many elongated perforations (see figure 3). For example, an arrangement of perforations located in many concentric and equally spaced imaginary circles can be employed. In this case, the stationary perforated plate 8 is simply configured to rotate around the center of the imaginary circles. Consequently, the perforations in each imaginary circle are equally spaced from each other, but the spacing between adjacent perforations decreases by an imaginary circle located closer to the axis of rotation.

[085] Figures 10 and 12 show the smoothing device 26 provided with a cleaning device 17, descending from the perforated plates 8 and 9 for cleaning the opposite surfaces and perforations 10 of the perforated plates 8 and 9. The cleaning device 17 according to the present embodiment has a cleaning supply line comprising many supply lines which are substantially opposite to the descending side surface of the movable perforated plate 9 and extend substantially horizontally with vertical spacing therebetween. Each of the pipes forming the cleaning liquid supply pipe 18 is provided with many nozzles 19 spaced apart from each other. As shown in Figure 11, the many supply lines of the cleaner supply line 18 are branched from a single line. Each of the branch pipes 18 is connected to the mixed gas pipe 4 by a flange gasket 27 and has a downward side end with an interrupt plug 28. The cleaning liquid supply pipe 18 is provided with an on / off valve. 29 on an upward side of this. The on / off valve 29 may be configured to be automatically turned to be intermittently opened or closed during the period during which the mixed gas supply is stopped. Guide member 14 and steering cylinder 11 are not shown in figure 11.

From the point of view of the cleaning effect, it is preferable that the spray nozzles 19 are equal in number to the perforations 10 and positioned one by one with perforations 10. However, there is no limitation to this feature. For example, nozzles 19 simply have to be arranged so that the cleaning liquid can be relatively relatively vaporized extensively from each nozzle 19, while the largest possible number of perforations 10, including the uppermost perforations 10 sprayed with the cleaning liquid. The cleaning effect can also be realized by the cleaning liquid coming down through the perforated plates 8 and 9. In addition, the many cleaning supply line pipes 18 can easily be made around their respective central axes to adjust the direction of each nozzle 19 upwards and downwards. The mixed gas pipe 4 may be provided with a visual inspection window allowing the operator to visually check cleaning device 17 and perforated plates 8 and 9. The provision of the visual inspection window makes it possible to adjust the direction of each nozzle 19 by rotating the associated piping of the cleaner supply piping 18 to optimize the vaporization angle of the cleaner for the cleaning condition thus verified when required.

[087] There is no limitation on the number of spray nozzles 19 shown. It is possible to employ a single nozzle to the cleaner very extensively. In this case, the cleaner supply line 18 comprises a supply line. It is possible for the liquid collecting slot 33 to be provided in a lower portion of the mixed gas piping 4 which is located adjacent the cleaning device 17 to collect the used cleaning liquid while a drainage hole presented in the bottom of the slot. for collecting a liquid 33 for draining a collected drainage liquid (figure 10).

[088] The location of the wiper 17 is not limited to the downward location of the perforated plates 8 and 9, but the wiper 17 may be in an upward position of the perforated plates 8 and 9 or on the opposite up and down sides of the perforated plates. 8 and 9. In cases where perforated plates 8 and 9 are inclined as shown in figure 2 or 6, unlike the arrangement shown in which perforated plates 8 and 9 are positioned vertically, the cleaning device 17 is preferably located at the upwardly oriented side of the perforated plates 8 and 9 (on the right side of the perforated plates shown in figure 2 or 6). This is because the cleaning effect can be intensified by the vaporized cleaning liquid running down the perforated plate surfaces as compared to the case where the cleaning device 17 is located on the downwardly oriented side of the perforated plates 8 and 9.

The provision of the cleaning device 17 makes it possible to prevent the flow resistance of the flow passage from increasing due to dust and the like deposited on the perforated plates or at the peripheral boundary of each perforation and to prevent the formation of the so-called sticky effect of the perforated plates. . Thus, it is possible to eliminate the need to clean the leveling device 6 by inserting the tubing by the operator during shutdowns of the mixed fluid supply system 1 or to reduce the frequency of cleaning considerably.

[090] As in the previous case, the portion of the mixed gas pipe 4 that accommodates cleaning device 17 may be configured to be removable from the rest of the mixed gas pipe 4 through the use of pipe connection, such as a flange joint. . This removable configuration allows the cleaning device 17 to be easily reached.

[091] Figure 13 shows another configuration of mixed gas pipe 21. Mixed gas pipe 21 comprises two pipes 21a and 21b extending parallel to each other and a short pipe 21c extending perpendicular to the interconnected end portions of the respective pipes 21a and 21b. The purpose of this configuration is to sufficiently widen the area of the flow passage defined by the portion 21c of the mixed gas pipe 21 accommodating the uniformizing device 6 by a simple structure. Although the two pipes 21a and 21b may be positioned horizontally parallel to each other, the vertically parallel arrangement shown is preferable because the perforated plates 8 and 9 are positioned substantially horizontally on the vertically extending pipe 21c. With the perforated plates 8 and 9 thus positioned, the movable perforated plate 9 is placed on an upper side of the stationary perforated plate 8 and can then move stably. There is no limitation to the illustrated configuration of the mixed gas tubing 21 to allow the mixed fluid to flow upwardly from below the equalizing device 6, but this configuration can be employed such that the piping 21a extending upwardly to the equalizing device 6 above the downwardly extending pipe 21b of the equalizer 6 to allow the mixed fluid to flow downwardly from the equalizer 6.

Unlike the configuration shown where the two pipes 21a and 21b are interconnected by a short sloping pipe 21d extending at an obtuse angle relative to the central axes of the respective pipes 21a and 21b as shown in figure 14. This configuration allows loss pressure in the pipeline to be reduced. In addition, as perforated plates 8 and 9 are positioned obliquely relative to the center axis of the short sloped pipe 21d, the perforated plates 8 and 9 have an increased actual area relative to the pipe cross-sectional area reducing the flow resistance of the perforated plates. 8 and 9.

[093] Each of the uniformization devices 6 and 16 has an advantageous function other than the combustible gas uniformity mixing function. This function is performed when the equalizing device is featured in a pipe configured to supply a combustible gas to a combustion system such as a gas turbine, for example. When urgently stopping this combustion system, a shutoff valve presented on the fuel gas supply line is closed to stop the fuel gas supply in an instant. As a result, excessive pressure fluctuations caused by excessive changes in the momentum of the fuel gas flow propagated toward the upstream side of the fuel gas supply pipe. This pressure propagation or offset by a rapid reduction or interruption of the proportion of the open area of the smoothing devices 6 and 16 in a timely manner. As a result, it becomes possible to eliminate a surge tank or a lightning tower, or at least reduce the capacity of this tank or tower.

Figures 15 to 17 each show another embodiment using a perforated plate to suppress or prevent the propagation of excessive pressure fluctuations from a downward side to an upward side of the pipe. This configuration includes a single rotatable perforated plate 22 which is rotatable about an imaginary line extending through the center thereof. As the pipe 23 shown in Figure 15 comprises a pipe having a circular cross-section, the rotary perforated plate has a circular outside as shown in Figure 16. Needless to say, the shape of the rotary perforated plate is not limited to this circular shape, but can be selected from various shapes to suit the cross-sectional shape of a used pipe. For example, a rotatable perforated plate 24 having a square shape as shown in Figure 17 may be employed for a pipe having a cross-sectional shape. The rotating perforated plate need not necessarily have the same shape as a cross section perpendicular to the central axis of the pipe. It is possible to employ the same shape of a cross section in a forward or backward inclined line of a plane perpendicular to the central axis of the pipe. The portion of tubing 23 accommodating the rotating perforated plate 22 may have a larger diameter for the total open area of the perforations 10 to be enlarged. As with the smoothing devices 6 and 16, each of the perforations 10 may be of elliptical, polygonal shape, meaning to include a square shape and a rectangular shape or a similar shape without limitation to a circular shape.

[095] The rotary perforated plate 22 or 24 thus formed has a rotary axis 25 extending through the center of the rotary perforated plate 22 or 24 and laterally projected through the tubing. The rotary shaft 25 is connected to an illustrative rotary conductor located outside the piping 23. Examples of such rotary conductors include an electric motor, a hydraulic cylinder and the like. As the pivot conductor rotates the pivot axis 25, the rotary perforated plate 22 or 24 enters a position in the same manner as the rotary perforated plate 22 or 24 almost fits into the flow path of the pipe (i.e. a fully closed position where rotating perforated plate 22 or 24, if formed without any perforation, would completely close the pipe flow passage as described by the solid line in figure 15) and a position where the plane of rotary perforated plate 22 or 24 extends along pipe center axis (ie a fully open position described by the double dotted line in figure 15). The rotary perforated plate 22 or 24 can be configured to stop in a fully open position, fully closed position and any angular position between these two positions.

[096] While the configurations shown in figures 15 to 17 each have a rotating perforated plate 22 or 24 configured to rotate about a horizontal axis, there is no limitation to this configuration. For example, the rotating perforated plate may be configured to rotate about a vertical axis or any desired axis of rotation between the horizontal axis and the vertical axis. A rotated position sensing device for detecting an interrupt position at which rotary perforated plate 22 or 24 has stopped may be presented to verify that rotary perforated plate 22 or 24 rests in an appropriate position.

[097] During normal operation of the above-mentioned combustion system, the rotating perforated plate 22 or 24 assumes the fully open position so that a high resistance to the flow of combustible gas does not function. However, when excessive pressure fluctuations are to propagate upward in response to closure of the emergency shut-down valve located downstream of piping 23 as described above, the rotary perforated plate 22 or 24 rotates rapidly to assume the fully closed position. . Thus, fluid flow passage is finally restricted only to perforations 10 to rotary perforated plate 22 or 24, with the result that the flow resistance in line 23 increases rapidly to dampen pressure fluctuations, thereby suppressing the propagation of flow fluctuations. pressure.

In addition to the proposed rotating perforated plates 22 and 24 described above, each of the rotating perforated plates 22 and 24 may be used as a mixed fluid uniformity device.

While each configuration uses a gas turbine as an example of the combustion system, the present invention is not limited particularly to the use of a gas turbine. For example, the combustion system may be a thermal boiler or an internal combustion engine such as a diesel engine or a gas engine. In summary, the uniformization device according to the present invention may be applied to any fuel system that is capable of maintaining combustion while the carried calorie is within a fixed range of calorie fluctuation. Industrial Applicability The mixed fluid uniformity device according to the present invention is capable of improving the mixing uniformity of a mixed fluid being supplied without regard to the fact that the conventional mixer is presented. While a gas is used as an example of a fluid to be subjected to the equalizing device, there is no limitation to gases. The equalizing device is also applicable to a liquid supply system. Alternatively, the uniformity device may be applied to a supply system for the supply of powder, pasty cement or the like.

Claims (9)

1. "MIXED FLUID UNIFORM DEVICE", comprising a plurality of perforated plates (8,9) removably superimposed with respect to one another in a fluid flow passage, characterized in that: said various perforated plates (8,9) are each formed by several perforations (10,20); said perforated plates (8, 9) are inclined with respect to a direction perpendicular to a central axis of said flow passage; and with respect to the removal of said various perforated plates (8,9) in their respective planes in the form of face to face overlapping one another, a degree of area strictly overlapping between the perforations (10,20) of a perforated plate and the perforations (10,20) of other variations of the perforated plate to vary an open area ratio of the perforations (10,20) together. A "MIXED FLUID UNIFORM DEVICE" according to claim 1 further comprising a device for removing a perforated plate (9) located on the outside of said flow passage for removing said perforated plates (9) characterized in that: said perforated plates include a static perforated plate (8) fixed to the inside of said flow passage and an untouched movable perforated plate (9); and said device for removing a perforated plate is configured to alter said movable perforated plate (9). 3. "MIXED FLUID UNIFORM DEVICE" according to claim 1, characterized in that when the open area ratio of the perforations (10) together is maximum, the perforations (10) together have an open area. which is equal to or greater than a cross-sectional area of said flow pass. "MIXED FLUID UNIFORMING DEVICE" according to claim 2, characterized in that said movable perforated plate (9) is provided with a chute member (14) opposite to the lateral portions of said perforated plate. (9) which are situated in a direction perpendicular to the reciprocal direction of said movable perforated plate (9), to direct the movement of said movable perforated plate (9). 5. "MIXED FLUID UNIFORM DEVICE" according to claim 2, characterized in that a movable perforated plate (9) is interposed between two stationary perforated plates (8) between which a spacer (15) is interposed. to maintain a gap between them to allow the movable perforated plate (9) to slide between the two stationary perforated plates (8); and said two stationary perforated plates (8) and said spacer (15) are capable of performing a steering movement function of the movable perforated plate (9). 6. "MIXED FLUID UNIFORM DEVICE" according to claim 2, characterized in that each of the perforations (20) has a flattened shape extending in a direction perpendicular to a moving direction of said perforated plate. mobile (9). "MIXED FLUID UNIFORMING DEVICE" according to claim 1, characterized in that it comprises a cleaning device (17) located within the flow passage to clean the perforations (10), said cleaning device. (17) having plural nozzles (19) for vaporizing a cleaning liquid. 8 "MIXED FLUID UNIFORM DEVICE" according to claim 2, characterized in that said perforated plates (8,9) are configured so that they can close all perforations (10) by moving said movable perforated plate. (9).