CN114155983A

CN114155983A - Reactor model, reactor ventilation testing device and reactor ventilation testing method

Info

Publication number: CN114155983A
Application number: CN202111276834.1A
Authority: CN
Inventors: 林兆娣; 陆松; 孙立臣; 戴一辉; 胡北; 张丽丽; 康健; 李百利; 杜文学
Original assignee: China Nuclear Power Engineering Co Ltd
Current assignee: China Nuclear Power Engineering Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-03-08

Abstract

The invention discloses a reactor model, a reactor ventilation testing device and a reactor ventilation testing method, wherein the reactor model comprises the following components: a housing, a stack container and a stationary shield; the stack container is arranged in the shell, the fixed shielding part is positioned at the top of the shell, a gap is reserved between the wall surface of the stack container and the shell to form a stack pit, and the stack pit is a passage for wind to flow through the wall surface of the stack container; and the reactor model is provided with a pipeline interface which is used for connecting a wind supply and discharge system so as to ventilate at least the reactor pit. The reactor model is used for simulating a reactor prototype, the model has higher similarity with the prototype, the test operability is good, and the model manufacturing cost is low. The reactor ventilation testing device and the reactor ventilation testing method which correspond to each other utilize the reactor model to carry out testing, are easy to operate, and save the cost for developing the reactor ventilation testing research.

Description

Reactor model, reactor ventilation testing device and reactor ventilation testing method

Technical Field

The invention belongs to the technical field of nuclear, and particularly relates to a reactor model, a reactor ventilation testing device and a reactor ventilation testing method.

Background

The main purpose of ventilating the reactor in nuclear island engineering is to cool components such as a reactor container, a reactor top fixed shield, a reactor top protective cover, a cock and the like. Good ventilation and heat dissipation performance of the reactor is an important measure for ensuring the safety of the reactor, and the ventilation characteristic of the reactor is researched, so that support can be provided for the design of the reactor.

The reactor ventilation is mainly researched by researching the air flow characteristic, the heat dissipation characteristic and the temperature distribution characteristic of the wall surface of the pile pit. Because the air flow field of the air flow space for reactor ventilation is complex, it is difficult to accurately obtain the air flow characteristic and the heat dissipation characteristic of the system by using the existing empirical formula, and the research can be carried out only by a test and a numerical simulation method.

The prototype size of the reactor device is large (the radius of the ring is 18m), and the problems of high cost and great difficulty exist in carrying out 1:1 model test research under the existing technical conditions.

Because the space of the flow field in the reactor is relatively complex, the reliability of a calculation result obtained by a numerical simulation method needs to be verified by a test method.

Therefore, it is necessary to provide a reactor model, a reactor ventilation testing apparatus using the reactor model, and a corresponding reactor ventilation testing method.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and provides a reactor model, a reactor ventilation testing device and a reactor ventilation testing method, so as to solve the problem that the prior art lacks an effective testing means to research and verify the ventilation characteristics of a reactor.

In order to solve the technical problems, the invention adopts the following technical scheme:

in a first aspect, the present invention provides a reactor model comprising: a housing, a stack container and a stationary shield;

the stack container is arranged in the shell, the fixed shielding part is positioned at the top of the shell, a gap is reserved between the wall surface of the stack container and the shell to form a stack pit, and the stack pit is a passage for wind to flow through the wall surface of the stack container;

and the reactor model is provided with a pipeline interface which is used for connecting a wind supply and discharge system so as to ventilate at least the reactor pit.

Preferably, the housing comprises: the supporting skirt is positioned in the cylinder body and connected to the bottom surface of the shell;

the heap container supports support on the skirt, and from last to including down in proper order: the neck penetrates through and extends out of the fixed shielding part, the small end of the conical top section is connected with the neck, the large end of the conical top section is connected with the straight cylinder section, and the lower end enclosure is positioned in the supporting skirt;

the heap pit includes: the bottom area is enclosed by the shell bottom surface, the support skirt and the lower end enclosure, the annular area is enclosed by the shell side wall and the straight cylinder section, and the conical area is enclosed by the shell side wall, the conical top section and the fixed shielding part.

Preferably, the reactor model further comprises: a penetration;

the fixed shield portion includes: the shielding structure comprises a top plate, a bottom plate and an annular side wall, wherein a fixed shielding cavity is formed inside the top plate, the bottom plate and the annular side wall;

a plurality of penetrating pieces are arranged in the fixed shielding cavity, the bottom ends of the penetrating pieces extend out of the bottom plate and are connected with the pile container, and a gap is reserved between a hole penetrating through the penetrating pieces and the surface of the penetrating pieces on the bottom plate so as to communicate the fixed shielding cavity and the pile pit to form an air passing channel;

the pipeline interface is connected with the air supply and exhaust system and is also used for ventilating the fixed shielding cavity.

Preferably, the reactor is a fast reactor;

the reactor model is manufactured by reducing according to a geometric scale with reference to a reactor prototype, the reactor model and the reactor prototype meet the condition that the flow and the heat transfer are respectively similar, and the geometric scale is more than or equal to 5 lambda_L≥15；

The reynolds of the reactor model when vented was similar to that of the reactor prototype when vented.

In a second aspect, the present invention provides a reactor draft testing device comprising: the reactor model, the air supply and exhaust system and the measuring system are as described above;

the reactor model is used for simulating the reactor prototype ventilation;

the air supply and exhaust system is at least communicated with the stack pit and is used for ventilating the stack pit;

the measuring system comprises a measuring component which is arranged in the reactor model and the air supply and exhaust system and is at least used for obtaining the measuring data when the air supply and exhaust system ventilates the stack pit.

Preferably, a pipeline interface is arranged on the reactor model;

the air supply and exhaust system comprises: the air supply mechanism, the air supply pipe and the exhaust pipe;

the air supply mechanism is connected with the air supply pipe, and the air supply pipe and the exhaust pipe are connected to the pipeline interface.

Preferably, the measuring assembly comprises: a flow measurement assembly and a characteristic measurement assembly;

the flow measurement assembly is arranged in the air supply and exhaust system and is used for measuring the air supply quantity of the air supply and exhaust system;

the characteristic measurement assembly is arranged in the reactor model and the air supply and exhaust system and is used for measuring characteristic parameters when the air supply and exhaust system ventilates the reactor model.

Preferably, the reactor model comprises a housing as described above;

the air supply mechanism includes: a first air supply assembly;

the blast pipe includes: the first air supply assembly is connected with the first air supply pipe and the second air supply pipe;

the pipe interface includes:

the first pipeline interface is arranged at the lower part of the side wall of the shell and used for connecting the first air supply pipe to convey a first air supply flow to the annular area and the conical area of the pile pit;

the second pipeline interface is arranged on the supporting skirt, correspondingly arranged on the side wall of the shell and used for connecting the second air supply pipe to convey a second air supply flow to the bottom area of the pile pit;

the supporting skirt is also provided with an air exhaust hole for communicating the bottom area with the annular area;

and the fourth pipeline interface is arranged at the upper part of the side wall of the shell, is connected with the exhaust pipe and is used for outputting all air supply flow.

Preferably, the number of the first pipeline interfaces is five, the first pipeline interfaces are uniformly arranged in a surrounding manner, and correspondingly, the number of the first air supply pipes is five;

the number of the second pipeline interfaces is one, and correspondingly, the number of the second air supply pipes is one;

the number of the exhaust holes is five, and the exhaust holes are uniformly arranged in a surrounding manner;

the number of the fourth pipeline interfaces is ten, the fourth pipeline interfaces are uniformly arranged in a surrounding manner, and correspondingly, the number of the exhaust pipes is ten;

the first air supply assembly includes: the first fan, the first main pipeline and the first air supply ring pipe;

the first fan is connected with the input end of the first main pipeline, the output end of the first main pipeline is connected with the first air supply ring pipe and the second air supply pipe, and the first air supply ring pipe surrounds and is connected with the first air supply pipe.

Preferably, the first air supply assembly further includes: a second fan and a second main pipeline;

the output end of the second main pipeline is connected with the first fan, and the input end of the second main pipeline is connected with the second fan.

Preferably, the first air supply loop is a regular pentagonal loop;

the output end of the first main pipeline is connected with one corner of the first air supply loop, and the centers of the five inner sides of the first air supply loop are respectively connected with one first air supply pipe;

the exhaust pipe adopts a horn mouth structure, the small end of the exhaust pipe is connected with the fourth pipeline interface, and the large end of the exhaust pipe faces the opening above the reactor model.

Preferably, the flow measurement assembly comprises: a first flow meter and a second flow meter;

the number of the first flow meters is five, the first flow meters are respectively connected to five first air supply pipes, and the sum of the air supply quantities measured by the five first flow meters is a first air supply quantity;

the second flow meter is one in number, is connected to the second air supply pipe and is used for measuring a second air supply quantity.

Preferably, the property measurement assembly is a pressure measurement assembly comprising:

the first pressure measuring point is provided with five groups which are respectively arranged in five first air supply pipes and used for measuring the air supply pressure of the first air supply pipes;

the second pressure measuring points are arranged in a group and are arranged in the second air supply pipe, and the second pressure measuring points are used for measuring the air supply pressure of the second air supply pipe;

four groups of fourth pressure measuring points are arranged in the pile pit at equal intervals along the height direction of the side wall of the shell and are used for measuring the pressure in the pile pit;

and the fifth pressure measuring point is provided with ten groups of pressure measuring points which are respectively arranged in ten exhaust pipes and used for measuring the exhaust pressure of the exhaust pipes.

Preferably, the reactor model comprises a fixed shielded cavity as described above;

the air supply and exhaust system is also communicated with the fixed shielding cavity and is used for ventilating the fixed shielding cavity;

the air supply mechanism further comprises: a second air supply assembly;

the blast pipe further comprises: the second air supply assembly is connected with the third air supply pipe;

the pipe interface further comprises: and the third pipeline interface is arranged on the top plate and used for connecting the third air supply pipe to convey a third air supply flow to the fixed shielding cavity.

Preferably, the number of the third pipeline joints is four, the third pipeline joints are uniformly arranged in a surrounding manner, and correspondingly, the number of the third air supply pipes is four;

the second air supply assembly includes: a third fan, a third main pipeline and a second air supply ring pipe;

the third fan is connected with the input end of the third main pipeline, the output end of the third main pipeline is connected with the second air supply ring pipe, and the second air supply ring pipe surrounds and is connected with the third air supply pipe.

Preferably, the second air supply ring pipe is a square ring pipe;

the output end of the third main pipeline is connected with one corner of the second air supply ring pipe, and the centers of the lower sides of the four sides of the second air supply ring pipe are respectively connected with one third air supply pipe.

Preferably, the measuring assembly is further configured to obtain measurement data when the air supply and exhaust system ventilates the fixed shielding cavity;

the flow measurement assembly further includes: a third flow meter;

the number of the third flow meters is one, and the third flow meters are arranged in the third main pipeline and used for measuring a third air supply flow;

the pressure measurement assembly further comprises: and four groups of third pressure measuring points are arranged in the four third air supply pipes respectively and are used for measuring the air supply pressure of the third air supply pipes.

In a third aspect, the invention provides a reactor draft testing method, which uses the reactor draft testing device for testing.

Preferably, the method uses the reactor draft test device as described above with a first flow meter, a second flow meter, a first pressure test point, a second pressure test point, a fourth pressure test point and a fifth pressure test point to perform a reactor draft resistance characteristic test;

and acquiring a pit piling resistance coefficient when the pit is ventilated according to the measurement data of the first flowmeter, the second flowmeter, the first pressure measuring point, the second pressure measuring point, the fourth pressure measuring point and the fifth pressure measuring point.

Preferably, the method uses the reactor ventilation testing device which is also provided with the third flow meter and the third pressure measuring point to carry out a reactor ventilation resistance characteristic test;

and acquiring the total resistance coefficient when the pile pit and the fixed shielding cavity are ventilated according to the measurement data of the first flowmeter, the second flowmeter, the third flowmeter, the first pressure measuring point, the second pressure measuring point, the third pressure measuring point, the fourth pressure measuring point and the fifth pressure measuring point.

The reactor model provided by the invention is used for simulating a reactor prototype and is at least used for testing the flowing and heat transfer characteristics of wind flowing through the wall surface of the reactor container when a reactor pit is ventilated. The model has higher similarity rate with a prototype, and meanwhile, the test has good operability and low model manufacturing cost.

The reactor ventilation testing device and the reactor ventilation testing method provided by the invention correspondingly utilize the reactor model to carry out ventilation testing, can be used for carrying out ventilation test research on the reactor, or verifying the ventilation characteristic of the reactor obtained through simulation calculation, and adopts the model to carry out the test, so that the operation is easy, the cost for carrying out the ventilation test research on the reactor is saved, support is provided for the reactor design, and the good performance of the designed reactor is further ensured.

Drawings

FIG. 1 is a schematic structural view of a reactor model according to an embodiment of the present invention (with a penetration member omitted);

FIG. 2 is an external view of a reactor model according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the internal structure of a reactor model according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a reactor aeration testing apparatus according to an embodiment of the present invention;

FIG. 5 is a schematic view showing a structure of a reactor model connected to an air supply duct and an air exhaust duct according to an embodiment of the present invention;

FIG. 6 is a plan view of the first and second air delivery pipes according to the embodiment of the present invention;

FIG. 7 is a plan view of a second air delivery duct and an air discharge opening according to an embodiment of the present invention;

FIG. 8 is a schematic view of a connection structure of a first air supply assembly according to an embodiment of the present invention;

FIG. 9 is a schematic view of a connection structure of a second air supply assembly according to an embodiment of the present invention;

FIG. 10 is a schematic plan view of the first pressure measuring point and the second pressure measuring point in example 3 of the present invention;

fig. 11 is a schematic view of an elevational layout of a pressure measuring unit according to embodiment 3 of the present invention (a schematic view of a planar layout is omitted in the drawing);

fig. 12 is a schematic structural view of a reactor ventilation and heat dissipation characteristic testing apparatus according to embodiment 4 of the present invention;

FIG. 13 is a layout diagram of first air temperature measurement points according to example 4 of the present invention;

FIG. 14 is a layout diagram of second air temperature measurement points according to example 4 of the present invention;

FIG. 15 is a schematic view showing the arrangement of the temperature measuring unit in the elevation view (the schematic view of the arrangement of the plane is omitted in the figure) according to embodiment 4 of the present invention;

fig. 16 is a schematic view showing the arrangement of the wall surface temperature measuring unit according to embodiment 4 of the present invention in a vertical plane (the schematic view of the arrangement of the wall surface is omitted).

Description of reference numerals:

the reactor comprises a reactor model 1, a shell 11, a support skirt 111, a shell bottom surface 112, a shell side wall 113, a reactor container 12, a neck 121, a conical top section 122, a straight cylinder section 123, a lower seal head 124, a fixed shielding part 13, a top plate 131, a bottom plate 132, an annular side wall 133, a fixed shielding cavity 134, a penetrating piece 14, a reactor pit 15, a bottom area 151, an annular area 152, a conical area 153, a pipeline interface 16, a first pipeline interface 161, a second pipeline interface 162, an exhaust hole 163, a third pipeline interface 164 and a fourth pipeline interface 165;

an air supply and exhaust system 2, an air supply mechanism 21, a first air supply component 211, a second fan 2111, a second main pipe 2112, a first fan 2113, a first main pipe 2114, a first air supply loop 2115, a second air supply component 212, a third fan 2121, a third main pipe 2122, a second air supply loop 2123, an air supply pipe 22, a first air supply pipe 221, a second air supply pipe 222, a third air supply pipe 223 and an exhaust pipe 23;

the measuring system 3, the flow measuring component 31, the first flow meter 311, the second flow meter 312, the third flow meter 313, the pressure measuring component 32, the first pressure measuring point 321, the second pressure measuring point 322, the third pressure measuring point 323, the fourth pressure measuring point 324, the fifth pressure measuring point 325, the temperature measuring component 33, the wall temperature measuring component 331, the conical top section temperature measuring point 3311, the straight cylinder section temperature measuring point 3312, the lower head temperature measuring point 3313, the air temperature measuring component 332, the first air temperature measuring point 3321, the second air temperature measuring point 3322, the third air temperature measuring point 3323 and the fourth air temperature measuring point 3324.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.

In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly or removably connected, or integrally connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

Example 1:

as shown in fig. 1 to 3, a reactor model 1 includes: a housing 11, a stack container 12, and a fixed shield 13; the stack container 12 is arranged in the outer shell 11, the fixed shielding part 13 is positioned at the top of the outer shell 11, a gap is reserved between the wall surface of the stack container 12 and the outer shell 11 to form a stack pit 15, and the stack pit 15 is a channel for wind to flow through the wall surface of the stack container 12; the reactor model 1 is provided with a pipe connection 16 for connecting a blast and exhaust system 2 (see fig. 4) to ventilate at least the pit 15.

In this embodiment, the reactor is a fast reactor; the reactor model 1 is manufactured by reducing according to a geometric scale with reference to a reactor prototype, the reactor model and the prototype meet the condition that the flow and the heat transfer are respectively similar, and the geometric scale 5 is more than or equal to lambda_LNot less than 15; the reynolds of the reactor model 1 when vented was similar to that of the reactor prototype when vented.

In the present embodiment, the reactor model 1 includes: a housing 11, a stack container 12, and a fixed shield 13; the stack container 12 is arranged in the shell 11, the fixed shielding part 13 is positioned at the top of the shell 11, and a gap is reserved between the wall surface of the stack container 12 and the shell 11 to form a stack pit 15; the housing 11 includes: the supporting skirt 111 is positioned in the cylinder and connected to the shell bottom surface 112; the stack container 12 is supported on the support skirt 111 and includes, from top to bottom: the neck 121 penetrates through and extends out of the fixed shielding part 13, the small end of the conical top section 122 is connected with the neck 121, the large end of the conical top section 122 is connected with the straight cylinder section 123, and the lower end enclosure 124 is positioned in the supporting skirt 111; the heap pit 15 includes: a bottom region 151 surrounded by the housing bottom surface 112, the support skirt 111, and the bottom head 124, an annular region 152 surrounded by the housing side wall 113 and the straight tube section 123, and a tapered region 153 surrounded by the housing side wall 113, the tapered top section 122, and the fixed shield 13; specifically, the neck 121 is cylindrical, the conical top section 122 is frustoconical, the straight section 123 is cylindrical, the lower end cap 124 is ellipsoidal, and the stack pit 15 forms a flow path for air to flow through the wall of the stack container 12.

In this embodiment, the reactor model 1 further includes: a penetration 14; the fixed shield portion 13 includes: a top plate 131, a bottom plate 132 and an annular side wall 133, a fixed shielding cavity 134 being formed inside the top plate 131, the bottom plate 132 and the annular side wall 133; a plurality of penetrating pieces 14 are arranged in the fixed shielding cavity 134, the bottom ends of the penetrating pieces extend out of the bottom plate 132 and are connected with the stack container 12, and a gap is reserved between a hole penetrating through the penetrating pieces 14 on the bottom plate 132 and the surface of the penetrating pieces 14 so as to communicate the fixed shielding cavity 134 and the stack pit 15 to form an air passing channel; specifically, through holes are formed in the top plate 131 and the bottom plate 132 to penetrate through the neck 121, the bottom plate 132 is arranged at a height aligned with the bottom end of the neck 121, the annular side wall 133 is connected with the bottom plate 132 and then continues to extend downwards, the penetrating pieces 14 penetrate through the fixed shielding cavities 134, the top ends of the penetrating pieces are fixedly connected with the top plate 131, the bottom ends of the penetrating pieces penetrate through the bottom plate 132 and then extend to the upper side of the conical top section 122, holes for penetrating the penetrating pieces 14 are formed in the bottom plate 132, gaps are reserved between the outer walls and the inner walls of the holes of the penetrating pieces 14, and therefore wind flowing between the fixed shielding cavities 134 and the stack pit 15 flows downwards into the stack pit 15 and flows through the surface of the penetrating pieces 14 in the process.

Specifically, the reactor model 1 is used for simulating the ventilation of a reactor prototype, and to obtain the similar ventilation conditions, the following theoretical analysis is performed before the reactor model is manufactured in this embodiment:

considering the requirements of experimental studies on reactor ventilation using the reactor model 1 with and without heat sources, the reactor model 1 is designed to meet the condition that the ventilation system operates with a model similar to the air flow and heat transfer in the prototype.

Under the condition of no heat source, the air flow is only acted by a fan, and the convection heat exchange phenomenon does not occur, so that the Reynolds similarity is met between the air flow and the fan, and the air flow similarity can be realized.

Under the condition of a heat source, the air flow and heat transfer characteristics are comprehensively reflected by the phenomena of natural convection and forced convection, wherein the Gr and Nu are Schert numbers respectively representing the flow and heat transfer characteristics of the natural convection, and the Nu can be expressed as functions of the Gr and Pr, namely Nu ═ f (Gr, Pr); in the forced convection phenomenon, the reynolds number Re and the nuschelt number Nu characterize the flow and heat transfer characteristics thereof, respectively, and Nu is expressed as a function of the reynolds number Re and the prandtl number Pr, i.e., Nu ═ f (Re, Pr). When the air flow and heat transfer in the reactor are mainly natural convection heat transfer (Gr/Re)²>16) In time, to ensure that the flow and heat transfer of the model and the prototype are similar, the Grating Xiaofu numbers of the model and the prototype are similar; when the air flow and heat transfer in the reactor are mainly forced convection heat transfer (0)<Gr/Re²<0.3), the Reynolds numbers of the model and the prototype are similar to ensure that the flow and the heat transfer of the model and the prototype are similar.

According to the basic data of the ventilation of the existing fast reactor pit prototype, the heat exchange capability of the reactor in the prototype during ventilation is initially carried outThe step estimation and analysis result shows that the reactor body heat dissipation condition under the rated working condition is met, when the ventilating and air supply temperature of the fast reactor pit is 18 ℃, the air flow rate of the annular section of the pit is 0.93m/s, and the comprehensive convective heat transfer coefficient is 5.12W/(m/s)²C.g. to be prepared into a preparation. Therefore, the flow state of the annular cross section of the pit is turbulent (Reynolds number Re of the flow is 9.48X 10)⁴>10⁴) And mainly uses forced convection heat transfer (Gr/Re)²＝0.28)。

The results of the foregoing analysis show that in experimental studies conducted in the model, the reynolds similarity criterion was used for the constraints both under the conditions of heat source consideration and under the conditions of no heat source consideration.

The model is designed by adopting a Reynolds similarity criterion, and geometric scale lambda is respectively selected_LComparative analyses were performed at 5,10,15 and the model size and flow characteristics are shown in tables 1 and 2, respectively.

TABLE 1 comparison of model dimensions at different scales

TABLE 2 comparison of air flow characteristics at different geometric scales

As can be seen from the comparison in tables 1 and 2, the geometric scale selection is small (λ)_L5), the overall structure of the model is a cylinder with the diameter of 3.48m and the height of 3.62m, the Reynolds number Re of the annular section of the straight cylinder section is 4887-29324, which meets the turbulent flow characteristics of the prototype, but the size of the geometric structure is large, which increases the difficulty of measurement and operation of the model test; the geometric scale is selected to be too large (lambda)_L15), the overall structure of the model is a cylinder with the diameter of 1.16m and the height of 1.21m, the geometric structure dimension is easy to measure by experiment, but the flow Reynolds number Re of the annular section of the straight cylinder section is 1629-9775, the turbulent flow characteristic in the prototype structure is not met, and the section wind speed of the air supply pipeline is higher than 30m/s if the flow is similar to each otherThereby reducing the operability of the model test.

Comprehensively considering the similarity of the models and the actual operability of the test, and preliminarily selecting the lambda from the models_LAnd (5) building a model test platform by a 10-degree geometric scale.

More specifically, the reactor model of the present embodiment is made as follows:

the shell 11 and the fixed shielding part 13 are made of double-layer organic glass, the stack container 12 is made of stainless steel, the penetrating piece 14 is made of organic glass, and the materials are adopted to ensure good heat source characteristics and boundary conditions, the shell 11 and the stack container 12 both adopt a multi-section structure so as to be convenient to install and arrange, the shell 11 is divided into a lower section and an upper section which are connected through an external flange, the upper section is connected with the fixed shielding part 13 through an external flange, the stack container 12 is divided into a lower section and an upper section, the upper section comprises a neck part 121 and a conical top section 122, the lower section comprises a straight cylinder section 123 and a lower end enclosure 124, and the two sections are connected through an internal flange; optionally, the neck 121, the conical top section 122, the straight cylinder section 123 and the lower end enclosure 124 of the reactor vessel 12 may also be welded in sequence, or connected in sequence through an internal flange; all flange plates are sealed by glass cement after being connected, and an asbestos protection structure is paved on the bottom surface 112 of the shell to prevent the shell 11 from being damaged after the reactor vessel 12 is heated.

In the process of building the test platform, the lower seal head 124 of the reactor vessel 12 is restricted by the inherent size of the stainless steel standard part, so the geometric scale is corrected by lambda_L9.9, through the design, the model has higher ventilation characteristic similarity rate with the prototype, and simultaneously, the practical operability of the test is good, and the model manufacturing cost is low.

Example 2:

as shown in fig. 1-3 in conjunction with fig. 4-9, the present embodiment provides a reactor aeration testing apparatus, including: a reactor model 1, an air supply and exhaust system 2 and a measurement system 3 as described in example 1; the reactor model is used to simulate the reactor prototype venting.

The air supply and exhaust system 2 is at least communicated with the stack pit 15 of the reactor model 1 and is used for ventilating the stack pit 15.

In the present embodiment, a pipe interface 16 is disposed on the reactor model 1; the air supply and exhaust system 2 comprises: an air supply mechanism 21, an air supply pipe 22 and an exhaust pipe 23; the air supply mechanism 21 is connected with the air supply pipe 22, and the air supply pipe 22 and the exhaust pipe 23 are connected on the pipeline interface 16.

In the present embodiment, the air blowing and exhausting system 2 is configured to blow air into the stack pit 15 and to exhaust air from the stack pit 15 after the air flows over the wall surface of the stack container 12, and the air blowing mechanism 21 includes: a first air supply assembly 211; the blast duct 22 includes: a first air supply pipe 221 and a second air supply pipe 222, wherein the first air supply assembly 211 is connected with the first air supply pipe 221 and the second air supply pipe 222; the pipe interface 16 includes: a first pipe connection 161, a second pipe connection 162, an exhaust hole 163 and a fourth pipe connection 165, wherein the first pipe connection 161 is disposed at a lower portion of the casing sidewall 113 and is used for connecting the first air supply pipe 221 to deliver a first air supply flow Q1 to the annular region 152 and the conical region 153 of the pit 15; a second duct port 162 is provided on the supporting skirt 111 and correspondingly on the casing side wall 113, for connecting the second air supply duct 222 to deliver a second air supply flow Q2 to the bottom region 151 of the pit 15; the supporting skirt 111 is further provided with an air exhaust hole 163 for communicating the bottom region 151 with the annular region 152; the fourth duct interface 165 is disposed on the upper portion of the side wall 113 of the housing, and is connected to the exhaust duct 23, for outputting the entire flow of the supplied air; specifically, the first blowing air flow rate Q1 flows through the annular region 152 and the conical region 153 from bottom to top to realize ventilation and heat dissipation of the straight cylinder section 123 and the conical top section 122; the second air flow Q2 flows through the bottom region 151 inside the supporting skirt 111 to achieve ventilation and heat dissipation of the lower end enclosure 124, and after being exhausted into the annular region 152 through the exhaust hole 163, the second air flow Q3578 converges with the first air flow Q1 to continue flowing through the annular region 152 to achieve ventilation and heat dissipation of the straight cylinder section 123 and the conical top section 122.

In this embodiment, the air supply and exhaust system 2 is further communicated with the fixed shielding cavity 134 for ventilating the fixed shielding cavity 134, specifically, the air supply and exhaust system 2 supplies air to the fixed shielding cavity 134 and exhausts air from the fixed shielding cavity 134 after the air flows through the penetration piece 14, and the air supply mechanism 21 further includes: a second air supply assembly 212; the blast duct 22 further includes: a third air supply pipe 223, wherein the second air supply assembly 212 is connected with the third air supply pipe 223; the pipe interface 16 further includes: a third duct interface 164, provided on the top plate 131, for connecting the third air supply duct 223 to supply a third air supply flow Q3 to the fixed shielding cavity 134, wherein the fourth duct interface 165 and the exhaust duct 23 output all air supply flows Q1+ Q2+ Q3; specifically, the third blowing flow rate Q3 flows through the fixed shielding cavity 134 from top to bottom, and flows into the tapered region 153 through the gap between the bottom plate 132 and the penetration piece 14, so as to realize ventilation and heat dissipation of the penetration piece 14; finally, the total air flow Q1+ Q2+ Q3 enters the exhaust duct 23 through the fourth duct connection 165 provided at the location of the conical region 153 and exits the reactor model 1.

In this embodiment, the number of the first duct interfaces 161 is five, and the first duct interfaces are uniformly arranged in a surrounding manner, and correspondingly, the number of the first air supply pipes 221 is five; the number of the second duct joints 162 is one, and correspondingly, the number of the second air supply pipes 222 is one; the number of the exhaust holes 163 is five, and the exhaust holes are uniformly arranged in a surrounding manner; the number of the fourth pipeline interfaces 165 is ten, the fourth pipeline interfaces are uniformly arranged in a surrounding manner, and correspondingly, the number of the exhaust pipes 23 is ten; the first air blowing assembly 211 includes: a first fan 2113, a first main duct 2114, and a first supply loop 2115; the first fan 2113 is connected to an input end of the first main conduit 2114, an output end of the first main conduit 2114 is connected to the first supply loop 2115 and the second supply pipe 222, and the first supply loop 2115 surrounds and is connected to the first supply pipe 221.

In this embodiment, the first air supply assembly 211 further includes: a second fan 2111 and a second main duct 2112; the output end of the second main pipe 2112 is connected with the first fan 2111, and the input end of the second main pipe 2112 is connected with the second fan 2113; specifically, in the model test, in order to meet the air supply requirement, the fan needs to be selected. According to the Reynolds similarity, which is a premise of ensuring that the model and the prototype meet the similarity of flow and heat transfer, the Reynolds similarity is reflected in the aspects of heat dissipation similarity and boundary layer similarity, according to a heat dissipation loss calculation method meeting the Reynolds similarity, the pressure loss of different air supply flows in a test is analyzed, the maximum pressure loss meeting the design flow condition is estimated, and 20% of design allowance is considered to be used as a basis for selecting the air volume and the air pressure of the fan. It should be noted that the type selection referred to herein should include not only the selection of the fan type, but also the design of the number of fans and the arrangement of fan connection, and specifically, two fans for delivering the first air supply flow rate Q1 and the second air supply flow rate Q2 are finally selected and connected in sequence.

In this embodiment, the number of the third duct joints 164 is four, and the third duct joints are uniformly arranged in a surrounding manner, and correspondingly, the number of the third air supply pipes 223 is four; the second air supply assembly 212 includes: a third fan 2121, a third main conduit 2122, and a second supply loop 2123; the third fan 2121 is connected to an input end of the third main pipe 2122, an output end of the third main pipe 2122 is connected to the second air supply loop 2123, the second air supply loop 2123 surrounds and is connected to the third air supply pipe 223, and specifically, one fan for delivering a third air supply flow Q3 is selected and connected to the third main pipe 2122 for supplying air upwards.

In this embodiment, the first supply collar 2115 is a regular pentagonal collar; the output end of the first main pipe 2114 is connected to one corner of the first air supply loop 2115, and the centers of the five inner sides of the first air supply loop 2115 are respectively connected to one first air supply pipe 221; the exhaust pipe 23 is of a bell-mouthed structure, the small end of the exhaust pipe is connected with the fourth pipeline interface 165, and the large end of the exhaust pipe faces the opening above the reactor model 1.

In this embodiment, the second supply collar 2123 is a square collar; the output end of the third main pipe 2122 is connected to one corner of the second air supply loop 2123, and the centers of the four lower sides of the second air supply loop 2123 are respectively connected to one third air supply pipe 223.

Specifically, the first air supply pipe 221, the second air supply pipe 222 and the third air supply pipe 223 adopt straight pipes to connect corresponding pipe interfaces, the first air supply pipe 221 and the second air supply pipe 222 extend to the outside of the side wall 113 of the shell of the reactor model 1, the third air supply pipe 223 extends to the upper part of the top plate 131 of the reactor model 1, in order to reduce the kinetic energy loss of the air outlet, the air outlet pipe 23 adopts a bell mouth structure with a diffusion angle of 8 degrees, the air outlet pipe 23 is provided with a 90-degree bent pipe, one small end is connected with the fourth pipe interface 165, after rotating 90 degrees, one large end extends to the upper part of the reactor model 1 to open, the corners of the first air supply ring pipe 2115 and the second air supply ring pipe 2123 are in arc-shaped transition, the first fan 2113, the second fan 2111 and the third fan 2121 are placed on a plane with the same height as the bottom of the reactor model 1, the first main pipe 2114 and the second main pipe 2112 adopt two straight pipes to be arranged in a 90-degree, the third main pipe 2122 comprises a lower horizontal pipe section, an upper bent pipe section and an upper horizontal pipe section which are sequentially connected at 90 degrees.

The measuring system 3 comprises measuring components which are arranged in the reactor model 1 and the air supply and exhaust system 2 and are at least used for acquiring ventilation characteristic measuring data when the air supply and exhaust system 1 ventilates the pit 15.

In this embodiment, the measurement assembly includes: a flow measurement assembly 31 and a characteristic measurement assembly; the flow measurement component 31 is arranged in the air supply and exhaust system 2 and is used for measuring the air supply quantity of the air supply and exhaust system 2; the characteristic measurement component is arranged in the reactor model 1 and the air supply and exhaust system 2 and is used for measuring characteristic parameters when the air supply and exhaust system 2 ventilates the reactor model 1.

In the present embodiment, the flow measurement assembly 31 includes: a first flow meter 311 and a second flow meter 312; the number of the first flow meters 311 is five, the first flow meters 311 are respectively connected to five first air supply pipes 221, and the sum of the air supply amounts measured by the five first flow meters 311 is a first air supply amount Q1; the second flow meters 312, which are one in number, are connected to the second air supply pipe 222, and measure a second air supply amount Q2.

In this embodiment, the flow measurement assembly 31 further includes: a third flow meter 313; the third flow meters 313 are provided in the third main pipe 2122, and measure a third blowing flow Q3.

Specifically, the flow measurement assembly 31 employs a vortex shedding flowmeter.

Embodiment 2 of the present invention provides a reactor ventilation testing apparatus, which is used for testing a reactor model 1 to obtain ventilation characteristic parameters of the reactor prototype, so as to perform experimental study on the ventilation characteristic of the reactor prototype, or verifying the ventilation characteristic of the reactor prototype obtained through simulation calculation, and performing an experiment by using a reduced model, and the apparatus is easy to operate, saves the cost for performing the research on the ventilation characteristic of the reactor, can accurately obtain the ventilation characteristic of the reactor, and provides support for reactor design.

Example 3:

with reference to fig. 1-3, 4-9, and 10-11, this embodiment provides a reactor ventilation resistance characteristic testing apparatus, specifically, on the basis of embodiment 2, the characteristic measuring component is a pressure measuring component 32, the pressure measuring component 32 is used to measure the pressure in the air supply and exhaust system 2 and the reactor model 1 under the condition that the air supply and exhaust system 2 ventilates the reactor model 1, and the resistance characteristic of the reactor model 1 is analyzed through the data obtained by measurement by the flow measuring component 31 and the pressure measuring component 32, so as to approximately obtain the resistance characteristic of the reactor prototype.

In the present embodiment, the pressure measurement assembly 32 includes: five groups of first pressure measuring points 321 are arranged in the five first air supply pipes 221 respectively and used for measuring the air supply pressure of the first air supply pipe 211; a second pressure measuring point 322, which is arranged in a group in the second air supply pipe 222 and is used for measuring the air supply pressure of the second air supply pipe 222; four sets of fourth pressure measuring points 324 arranged at equal intervals in the height direction of the housing side wall 113 in the stack pit 15 for measuring the pressure in the stack pit 15; and ten groups of fifth pressure measuring points 325 are arranged in the ten exhaust pipes 23 respectively and used for measuring the exhaust pressure of the exhaust pipes 23.

Specifically, the measuring points distributed in each pipeline each include four pressure sensors uniformly arranged around the same cross section of the inner wall of the pipeline, four groups of the fourth pressure measuring points 324 are arranged at equal intervals in the height direction of the annular region 152, and correspond to the first-layer measuring section SEC1, the second-layer measuring section SEC2, the third-layer measuring section SEC3 and the fourth-layer measuring section SEC4 in fig. 11, respectively, and eight pressure sensors are uniformly arranged around each layer.

Accordingly, the present embodiment provides a reactor draft resistance characteristic test using the reactor draft resistance characteristic test apparatus as described above; and acquiring a pit piling resistance coefficient during pit piling ventilation according to the measurement data of the first flowmeter, the second flowmeter, the first pressure measuring point, the second pressure measuring point, the fourth pressure measuring point and the fifth pressure measuring point.

Specifically, one example of the resistance characteristic test when the above structure is used for ventilating the pit 15 includes the following test contents:

the resistance characteristic testing device is adopted to obtain the following parameters:

flow rate of air supply measured by flow rate measuring unit 31 in m³And/s, comprising:

Q_z1,Q_z2,Q_z3,Q_z4,Q_z5flow data measured by the five vortex street flowmeters of the first flowmeter 311 respectively;

,Q_xflow data measured by the second flow meter 312;

the pressure measured by the pressure measurement assembly 32, in Pa, includes:

p_iz1,p_iz2,p_iz3,p_iz4,p_iz5pressure data measured by the five measuring points of the first pressure measuring point 321;

p_ixpressure data measured at the second pressure measurement point 322;

p_ojthe pressure data measured by each of the ten pressure measurement points, j being 1,2, …,10, of the fifth pressure measurement point 325;

p_ok,jthe pressure data measured by each of the eight pressure sensors in the fourth pressure measuring point 324 located at the fourth layer measuring section SEC4, j being 1,2, …, 8;

the resistance coefficient of the reactor ventilation is calculated by utilizing the parameters, and the resistance coefficient comprises the following steps: calculate pit 15 VentilationCoefficient of resistance of pit

Calculating the resistance coefficient of the pit 15 for ventilation

The method is characterized in that the range from an air inlet of an air supply pipeline connected with the reactor vessel 12 to a fourth-layer measuring section SEC4 of the straight cylinder section 123 is used as a calculation area, the reduction value of the total air pressure between the calculation area and the straight cylinder section is used as the pressure loss of the calculation area, and the calculation area is obtained by adopting the pressure loss to carry out dimensionless method, and specifically comprises the following steps:

calculating the average blowing pressure of the ventilation of the pile pit 15

The unit Pa is a linear pressure difference,

calculating the average pressure of the annular region 152 measured at the fourth pressure measurement point 324

For the sake of simplicity, the arithmetic mean value is calculated using the pressure data measured by the eight pressure sensors of the fourth-layer measuring section SEC4, in Pa,

calculating the average dynamic pressure of the vent of the pit 15

The unit Pa is a linear pressure difference,

wherein，v_ix,v_iz1,v_iz2,v_iz3,v_iz4,v_i5zThe cross-sectional flow velocities of the second air supply pipe 322 and the five first air supply pipes 321 are calculated by dividing the corresponding flow by the cross-sectional area, and the unit is m/s; rho is air density in kg/m³；

Calculating the average dynamic pressure of the fourth layer measuring section SEC4

The unit Pa is a linear pressure difference,

wherein A is_zThe area of the annular region 152 corresponding to the fourth layer measurement section SEC4, in m²；

Dimensionless calculation of pit resistance coefficient of pit 15 ventilation

In the present embodiment, the pressure measurement assembly 32 further includes: four groups of third pressure measuring points 323 are arranged in the four third air supply pipes 223 respectively and are used for measuring the air supply pressure of the third air supply pipes 223; specifically, the third pressure measuring points 323 distributed in each pipeline comprise four pressure sensors uniformly arranged around the same section of the inner wall of the pipeline.

Accordingly, the present embodiment provides a reactor draft resistance characteristic test using the reactor draft resistance characteristic test apparatus as described above; and acquiring the total resistance coefficient when the pile pit and the fixed shielding cavity are ventilated according to the measurement data of the first flowmeter, the second flowmeter, the third flowmeter, the first pressure measuring point, the second pressure measuring point, the third pressure measuring point, the fourth pressure measuring point and the fifth pressure measuring point.

Specifically, the above-described structure is an example of a resistance characteristic test for ventilating the stack pit 15 and the fixed shield cavity 134, and further includes the following test contents:

the resistance characteristic testing device also obtains the following parameters:

Q_dflow data measured by the third flow meter 313;

the pressure measured by the pressure measurement component 32, in Pa, further includes:

p_id1,p_id2,p_id3,p_id4pressure data measured by four measuring points of the third pressure measuring point 323 respectively;

calculating the resistance coefficient of the reactor ventilation by using the parameters and the parameters, and further comprising the following steps: calculating the total resistance coefficient of ventilation of the pit 15 and the fixed shielded cavity 134

Calculating the total resistance coefficient of ventilation of the pit 15 and the fixed shielded cavity 134

The total pressure reduction value from the air inlet of the blast pipe of the reactor model 1 to the air outlet of the exhaust pipe 23 is used as the pressure loss, and the pressure loss is obtained by non-dimensionalization, and the method specifically comprises the following steps:

the average pressure of the air inlets for ventilation of the stack pit 15 and the fixed shielding cavity 134 is calculated, in Pa,

calculating the average pressure of the air outlet, calculating the arithmetic average value by adopting the data of ten measuring points of the fifth pressure measuring point 325, obtaining the unit Pa,

the average dynamic pressure of the air inlets for ventilation of the stack pit 15 and the fixed shielding cavity 134 is calculated, in Pa,

wherein v is_idThe average flow velocity of the pipeline section of the four third blast pipes 223 is calculated by dividing the corresponding flow by the area of the section, and the unit is m/s;

calculating the average dynamic pressure of the air outlet in unit Pa,

therein, 10A_oThe sum of the areas of the pressure measurement sections of the fifth pressure measurement points 325 is set for the ten exhaust pipes 23;

nondimensionally calculating the total resistance coefficient of ventilation of the pit 15 and the fixed shielded cavity 134

According to the apparatus and method provided in embodiment 3, the resistance characteristic in the air flow characteristic of the reactor ventilation system can be accurately obtained.

Example 4:

with reference to fig. 1-3, 4-9, and 12-16, the present embodiment provides a reactor ventilation and heat dissipation characteristic testing apparatus, whose specific structure is shown in fig. 12, including: a reactor model 1, a heating system (not shown in the figure), an air supply and exhaust system 2 and a measuring system 3; the reactor model 1 is used for simulating reactor prototype ventilation; the heating system comprises a heating assembly, a heating module and a control module, wherein the heating assembly is arranged in the reactor model 1 and used for heating the interior of the reactor model 1 so as to simulate the heating state of the reactor prototype; the air supply and exhaust system 2 is connected with the reactor model 1 and is used for ventilating the reactor model 1 and taking away heat in the reactor model 1; the measuring system 3 comprises measuring components which are arranged in the reactor model 1 and the air supply and exhaust system 2 and are used for obtaining the ventilation and heat dissipation characteristic measuring data when the air supply and exhaust system 2 ventilates the reactor model 1.

Specifically, in example 4, a heating system is added on the basis of example 2 to simulate the exothermic state of the reactor prototype; the air supply and exhaust system 2 takes away heat in the reactor model 1 when ventilating the reactor model 1; the measurement system 3 acquires ventilation and heat dissipation characteristic measurement data.

In this embodiment, the characteristic measuring component is a temperature measuring component 33, the temperature measuring component 33 is disposed in the reactor model 1 and the air supply and exhaust system 2, and is used for measuring a temperature parameter when the air supply and exhaust system 2 ventilates the reactor model 1, and the heat dissipation characteristic of the reactor model 1 is analyzed through data obtained by measurement of the flow measuring component 31 and the temperature measuring component 33, so as to approximately obtain the heat dissipation characteristic of the reactor prototype.

In the embodiment, the heating component is laid on the wall surface of the stack container 12 by using a silica gel electric heating sheet; the heating assembly is connected with the intelligent pressure regulating module, the intelligent pressure regulating module controls the power of the heating assembly, a temperature sensor is arranged on the wall surface of the reactor vessel 12, and the temperature sensor is connected with the intelligent pressure regulating module.

Specifically, the heating system adopts an electric heating system, and a heating assembly is arranged on the surface of the stack container 12 to control and regulate the heat flux density on the surface of the stack container 12; the heating component adopts a series of silica gel electric heating sheets laid on the wall surface of the reactor 12, the power of the silica gel electric heating sheets is controlled by the intelligent pressure regulating module to regulate heat, and the silica gel electric heating sheets are provided with an intelligent temperature control module for overheat protection; the silica gel electric heating sheets are provided with 3M back glue, are uniformly and flatly laid on the wall surface of the stacking container 12 and are fixed with each other through aluminum foil adhesive tapes so as to uniformly heat the wall surface of the stacking container 12; the thickness of the silica gel electric heating sheet is about 1.5mm,the working temperature limit is 180 ℃, the working voltage limit is 380V, and the maximum power can reach 2.5kW/m²。

In this embodiment, the temperature measuring assembly 33 includes: a wall temperature measuring unit 331 and an air temperature measuring unit 332, the wall temperature measuring unit 331 including: a cone top section temperature measuring point 3311, a straight cylinder section temperature measuring point 3312 and a lower head temperature measuring point 3313 which are respectively arranged on the wall surface of the corresponding part of the reactor vessel 12 for measuring the wall surface temperature of the corresponding part; an air temperature measurement assembly 332, comprising: a first air temperature measuring point 3321 for measuring the air temperature in the first air supply pipe 221 and the second air supply pipe 222; a second air temperature measuring point 3322 for measuring the air temperature in the third air supply pipe 223; a third air temperature measurement point 3323 for measuring the air temperature within the heap pit 15; a fourth air temperature measurement point 3324 for measuring the air temperature in the exhaust duct 23.

In this embodiment, first air temperature measurement point 3321 is located at the front of the output of first main conduit 2114 connecting first supply loop 2115 to second supply conduit 222; the second air temperature measuring point 3322 is arranged at the output end of the third main pipe 2122; the third air temperature measuring points 3323 are arranged in the stack pit 15, four groups of the third air temperature measuring points are arranged at equal intervals along the height direction of the shell side wall 113, and each group is uniformly provided with a plurality of temperature sensors in a surrounding manner along the circumferential direction of the shell side wall 113; the fourth air temperature measuring point 3324 is arranged at one end of the exhaust pipe 23 close to the fourth pipeline interface 165; four groups of straight cylinder section temperature measuring points 3312 are arranged on the wall surface of the straight cylinder section 123 at equal intervals along the height direction thereof, and each group is uniformly provided with a plurality of temperature sensors in a surrounding manner along the circumferential direction of the wall surface of the straight cylinder section 123; the cone top section temperature measuring point 3311 and the lower head temperature measuring point 3312 are respectively provided with a plurality of temperature sensors uniformly surrounding along the circumferential direction of the wall surfaces of the cone top section 122 and the lower head 124.

Specifically, the air temperature measuring assembly 332 is used for measuring the temperature of air flowing through the reactor model 1, the wall temperature measuring assembly 331 is used for measuring the wall temperature of the reactor vessel 12, the first air temperature measuring point 3321 and the second air temperature measuring point 3322 are respectively arranged one by one, the third temperature measuring points 3323 are arranged in four groups at equal intervals, each group is uniformly arranged in four groups in a surrounding manner, and the four groups correspond to a first-layer measuring section SEC1, a second-layer measuring section SEC2, a third-layer measuring section SEC3 and a fourth-layer measuring section SEC4 in fig. 14, and the fourth air temperature measuring points 3324 are arranged one by one in ten exhaust pipes 25; the cone top section temperature measuring point 3311 adopts four Pt100 temperature sensors which are uniformly arranged at the same height of the cone top section 122 in a surrounding manner; the straight cylinder section temperature measuring points 3312 adopt sixteen Pt100 temperature sensors, four groups are arranged at equal intervals along the height direction, four groups are uniformly arranged around each group, corresponding to a first straight cylinder section temperature measuring section BTC1, a second straight cylinder section temperature measuring section BTC2, a third straight cylinder section temperature measuring section BTC3 and a fourth straight cylinder section temperature measuring section BTC4 in the figure 15, and the lower end enclosure temperature measuring points 3313 adopt four Pt100 temperature sensors and are uniformly arranged around the same height of the lower end enclosure 124.

Accordingly, the present embodiment provides a method for performing a reactor ventilation and heat dissipation characteristic test using the reactor ventilation and heat dissipation characteristic test apparatus as described above.

In this embodiment, the method specifically includes the following steps: heating the inside of the reactor model 1 using the heating system; starting the air supply and exhaust system 2 to ventilate the reactor model 1; starting the measuring system 3 to measure and record data; and acquiring the heat exchange coefficient of the reactor model 1 during ventilation according to the data measured and recorded by the measuring system 3.

In the embodiment, the method is to use the reactor ventilation testing device to perform the reactor ventilation heat dissipation characteristic test; and acquiring the heat exchange coefficient of the wall surface of the reactor vessel when the stack pit and the fixed shielding cavity are ventilated according to the measurement data of the first flowmeter, the second flowmeter, the third flowmeter, the wall surface temperature measurement assembly, the first air temperature measurement point, the second air temperature measurement point, the third air temperature measurement point and the fourth air temperature measurement point.

Specifically, one example of the above-described structure for the scattering property test when ventilating the heap pit 15 and the fixed shield cavity 134 includes the following test contents:

the following parameters are obtained by adopting the heat dissipation characteristic testing device:

total flow rate Q of air supply measured by flow rate measurement unit 31_sUnit m of³/s，

Wherein Q is_iFlow data measured by the ten vortex street flowmeters respectively;

average supply air temperature measured at first air temperature measurement point 3321 and second air temperature measurement point 3322

Calculating an arithmetic mean value by the data of two measuring points, wherein the unit is;

average temperature of exhaust air measured by fourth air temperature measuring point 3324

Calculating an arithmetic mean value by using data of ten measuring points, wherein the unit is;

the wall surface temperature t of the conical top section 122 measured by the conical top section temperature measuring point 3331_dCalculating an arithmetic mean value by using data of four temperature sensors, wherein the unit is;

the wall surface temperature t of the straight cylinder section 123 measured by the straight cylinder section temperature measuring point 3312_zCalculating an arithmetic mean value by using data of sixteen temperature sensors, wherein the unit is;

the wall surface temperature t of the lower seal head 124 measured by the lower seal head temperature measuring point 3313_xCalculating an arithmetic mean value by using data of four temperature sensors, wherein the unit is;

the heat exchange coefficient of the reactor vessel 12 wall surface when ventilating to the reactor model 1 (including ventilating to the reactor pit 15 and the fixed shielding cavity 134) is calculated by using the parameters, and the method specifically comprises the following steps:

calculating the average temperature of the air supply

And average temperature of exhaust air

Average value of (a), unit c,

the actual heat dissipation W, in units W,

where ρ is_tTemperature in reactor model 1

Lower air density, unit kg/m³；

For the temperature in reactor model 1

Specific heat of air in J/(kg. DEG C);

calculating the average temperature of the walls of the stack vessel 12

In the unit of temperature,

wherein A is_d,A_z,A_xThe areas of the conical top section 122, the straight cylinder section 123 and the lower end enclosure 124 are respectively, and the unit m is²；

Calculating the heat exchange coefficient alpha of the reactor model 1 during ventilation in a non-dimensionalization mode,

according to the device and the method provided by the embodiment 4, the heat dissipation characteristic of the reactor ventilation system can be accurately acquired.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A reactor model, comprising: a housing, a stack container and a stationary shield;

2. The reactor model of claim 1, wherein the enclosure comprises: the supporting skirt is positioned in the cylinder body and connected to the bottom surface of the shell;

3. The reactor model of claim 2, further comprising: a penetration;

4. The reactor model of any one of claims 1 to 3, wherein the reactor is a fast reactor;

5. A reactor draft test device, comprising: the reactor model, air supply and exhaust system and measurement system of any one of claims 1 to 4;

the reactor model is used for simulating the reactor prototype ventilation;

6. The reactor draft testing device according to claim 5, wherein the air blowing and exhausting system comprises: the air supply mechanism, the air supply pipe and the exhaust pipe;

7. The reactor draft testing device according to claim 6, wherein the measuring assembly comprises: a flow measurement assembly and a characteristic measurement assembly;

8. The reactor draft testing device according to claim 7, wherein the reactor model is according to any one of claims 2 to 3;

the air supply mechanism includes: a first air supply assembly;

the pipe interface includes:

9. The reactor ventilation testing device of claim 8, wherein the number of the first pipeline interfaces is five, the first pipeline interfaces are uniformly arranged in a surrounding manner, and correspondingly, the number of the first air supply pipes is five;

10. The reactor draft testing device according to claim 9, wherein the first air supply assembly further comprises: a second fan and a second main pipeline;

11. The reactor draft test device according to claim 9, wherein said first supply air loop is a regular pentagonal loop;

12. The reactor draft testing device according to any one of claims 9 to 11, wherein the flow measuring assembly comprises: a first flow meter and a second flow meter;

13. The reactor draft testing device according to claim 12, wherein the characteristic measuring assembly is a pressure measuring assembly, the pressure measuring assembly comprising:

14. The reactor draft testing device according to claim 13, wherein the reactor model is as set forth in claim 3;

the air supply mechanism further comprises: a second air supply assembly;

15. The reactor ventilation testing device of claim 14, wherein the number of the third pipeline interfaces is four, the third pipeline interfaces are uniformly arranged in a surrounding manner, and correspondingly, the number of the third air supply pipes is four;

16. The reactor draft test device according to claim 15, wherein said second supply air loop is a square loop;

17. The reactor draft testing device according to any one of claims 15 to 16, wherein the measuring assembly is further configured to obtain measurement data when the air supply and exhaust system is ventilating the fixed shielding chamber;

the flow measurement assembly further includes: a third flow meter;

18. A method of testing reactor ventilation using a reactor ventilation test apparatus according to any one of claims 5 to 17.

19. The reactor draft testing method according to claim 18, wherein a reactor draft resistance characteristic test is performed using the reactor draft testing apparatus according to any one of claims 13 to 17;

20. The reactor draft testing method according to any one of claims 18 to 19, wherein a reactor draft resistance characteristic test is performed using the reactor draft testing apparatus according to claim 17;