CN115628620A - Control system and method for silicon carbide sintering furnace - Google Patents

Control system and method for silicon carbide sintering furnace Download PDF

Info

Publication number
CN115628620A
CN115628620A CN202211056327.1A CN202211056327A CN115628620A CN 115628620 A CN115628620 A CN 115628620A CN 202211056327 A CN202211056327 A CN 202211056327A CN 115628620 A CN115628620 A CN 115628620A
Authority
CN
China
Prior art keywords
preset
rotating speed
fan
less
correction coefficient
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202211056327.1A
Other languages
Chinese (zh)
Other versions
CN115628620B (en
Inventor
龚志刚
龚星宇
龚冠城
徐博文
袁洪峰
孟龙
李志涛
徐勤龙
马坤
李海洲
周泽宇
高志民
闫凡龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamada New Material Group Co ltd
Original Assignee
Yamada New Material Group Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamada New Material Group Co ltd filed Critical Yamada New Material Group Co ltd
Priority to CN202211056327.1A priority Critical patent/CN115628620B/en
Publication of CN115628620A publication Critical patent/CN115628620A/en
Application granted granted Critical
Publication of CN115628620B publication Critical patent/CN115628620B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0056—Regulation involving cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/04—Carbon-containing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2003/00—Type of treatment of the charge
    • F27M2003/04—Sintering

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)

Abstract

The invention relates to the technical field of sintering furnace control, in particular to a control system and a control method for a silicon carbide sintering furnace. The method comprises the following steps: the first detection unit is used for detecting the liquid inlet temperature J1 of the cooling liquid in the liquid inlet pipe in real time; the second detection unit is used for detecting the liquid outlet temperature J2 of the cooling liquid in the liquid outlet pipe in real time; the flow detection unit is used for acquiring the flow value of the cooling liquid; the calculation unit is used for calculating a heat absorption speed value P0 of the cooling liquid in the cooling pipe taken away from the furnace body according to the liquid inlet temperature J1, the liquid outlet temperature J2 and the flow value of the cooling liquid passing through the cooling pipe in real time; and the control unit is used for controlling the rotating speed N0 of the fan according to the heat absorption speed value P0. The invention can not only realize the high-efficiency cooling effect, but also accurately enable the temperature in the sintering furnace to reach the preset range, thereby fundamentally avoiding unnecessary fan energy waste.

Description

Control system and method for silicon carbide sintering furnace
Technical Field
The invention relates to the technical field of sintering furnace control, in particular to a control system and a control method for a silicon carbide sintering furnace.
Background
The silicon carbide sintering furnace is an intermittent resistance heating furnace, and is mainly applied to pressureless silicon carbide sintering, hard alloy and powder metallurgy industries for producing metal powder and composite metal powder of tungsten carbide powder, chromium carbide powder, titanium carbide powder, vanadium carbide powder and the like with various granularities, and sintering treatment is carried out after cold press molding.
However, in the prior art, when the sintering furnace is used for sintering silicon carbide, due to inaccurate temperature control, the sintered product has defects such as cracks, and further the mechanical property of the silicon carbide is affected, and the temperature reduction process in the furnace cannot be adjusted in real time. Therefore, how to provide a control system and method for a silicon carbide sintering furnace to overcome the above difficulties is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The control system of the silicon carbide sintering furnace provided by the invention calculates the heat absorption speed value taken away by cooling liquid from the furnace body based on the liquid inlet temperature, the liquid outlet temperature and the flow value of the cooling liquid, and further realizes the rapid cooling of the silicon carbide sintering furnace by controlling the rotating speed of a fan, thereby not only realizing the efficient cooling effect, but also accurately enabling the temperature in the sintering furnace to reach the preset range, and fundamentally avoiding the unnecessary energy waste of the fan.
The invention solves the problem that the temperature cannot be adjusted in real time in the cooling process in the furnace due to inaccurate temperature control when the sintering furnace is used for sintering silicon carbide in the prior art, adjusts and controls the rotating speed of the fan in real time by detecting parameters such as the liquid inlet temperature of the cooling liquid, the liquid outlet temperature of the cooling liquid, the flow value of the cooling liquid and the like in real time, utilizes gas to circulate in the furnace based on different rotating speeds of the fan, takes away heat through cooling water, and effectively realizes controllable cooling.
The invention solves the problem that in the prior art, in the forced cooling stage of the sintering furnace, the continuous work of the fan causes the gas to circulate in the furnace, so that a large amount of energy is consumed for supplying the fan to operate, and the cost is greatly increased.
In order to achieve the purpose, the invention provides the following technical scheme:
a control system for a silicon carbide sintering furnace, comprising:
the furnace body is internally provided with a heat preservation chamber;
the cooling pipe is arranged in the furnace body, one end of the cooling pipe is connected with a liquid inlet pipe for introducing cooling liquid, and the other end of the cooling pipe is connected with a liquid outlet pipe for discharging the cooling liquid;
the fan is arranged in the furnace body;
further comprising:
the first detection unit is used for detecting the liquid inlet temperature J1 of the cooling liquid in the liquid inlet pipe in real time;
the second detection unit is used for detecting the liquid outlet temperature J2 of the cooling liquid in the liquid outlet pipe in real time;
a flow detection unit for collecting at t 0 The flow rate value W1 of the cooling liquid at the time and at t 0 A flow rate value W2 of the coolant at the +1 time;
the gas detection unit is used for detecting the volume Q of gas rapidly filled into the furnace body in real time;
the calculation unit is used for calculating a heat absorption speed value P0 of the cooling liquid in the cooling pipe taken away from the furnace body according to the liquid inlet temperature J1, the liquid outlet temperature J2 and the flow value of the cooling liquid passing through the cooling pipe in real time;
the control unit is used for controlling the rotating speed N0 of the fan according to the heat absorption speed value P0;
wherein the heat absorption speed value P0 is obtained according to the following formula:
P0=(J2-J1)*（W2-W1）*M*C；
wherein M is the mass of the coolant per unit volume, and C is the specific heat capacity of the coolant.
In some embodiments of the present application, a preset heat absorption speed value matrix T0 and a preset fan rotation speed matrix a are set in the control unit, and for the preset fan rotation speed matrix a, a (A1, A2, A3, A4) is set, where A1 is a first preset fan rotation speed, A2 is a second preset fan rotation speed, A3 is a third preset fan rotation speed, A4 is a fourth preset fan rotation speed, and A1 < A2 < A3 < A4;
setting T0 (T01, T02, T03, T04) for the preset heat absorption speed value matrix T0, wherein T01 is a first preset heat absorption speed value, T02 is a second preset heat absorption speed value, T03 is a third preset heat absorption speed value, T04 is a fourth preset heat absorption speed value, and T01 is more than T02 and more than T03 and more than T04;
the control unit is used for selecting the corresponding fan rotating speed as the rotating speed of the fan according to the relation between the P0 and the preset heat absorption speed value matrix T0;
when P0 is less than T01, selecting the fourth preset fan rotating speed A4 as the rotating speed of the fan;
when the T01 is more than or equal to the P0 and less than the T02, selecting the third preset fan rotating speed A3 as the rotating speed of the fan;
when the T02 is more than or equal to P0 and less than T03, selecting the second preset fan rotating speed A2 as the rotating speed of the fan;
and when the T03 is more than or equal to P0 and less than T04, selecting the first preset fan rotating speed A1 as the rotating speed of the fan.
In some embodiments of the present application, further comprising:
the third detection unit is used for detecting the indoor temperature t in the heat preservation chamber in real time;
the control unit is also used for controlling and adjusting the rotating speed N0 of the fan according to the indoor temperature t;
a preset temperature matrix F0 in the heat preservation chamber and a preset fan rotating speed correction coefficient matrix B are also set in the control unit, and B (B1, B2, B3, B4) is set for the preset fan rotating speed correction coefficient matrix B, wherein B1 is a first preset fan rotating speed correction coefficient, B2 is a second preset fan rotating speed correction coefficient, B3 is a third preset fan rotating speed correction coefficient, B4 is a fourth preset fan rotating speed correction coefficient, and B1 is more than 0.8, B2 is more than B2, B3 is more than B4, and B4 is more than 1.2; setting F0 (F01, F02, F03, F04) for the preset heat preservation chamber indoor temperature matrix F0, wherein F01 is the first preset heat preservation chamber indoor temperature, F02 is the second preset heat preservation chamber indoor temperature, F03 is the third preset heat preservation chamber indoor temperature, F04 is the fourth preset heat preservation chamber indoor temperature, and F01 is greater than F02 and less than F03 and less than F04;
the detection unit is used for selecting a corresponding fan rotating speed correction coefficient according to the relation between t and the preset temperature matrix F0 in the heat preservation chamber so as to correct the rotating speed of the fan;
when t is less than F01, selecting a fourth preset fan rotating speed correction coefficient B4 to correct the fourth preset fan rotating speed A4, wherein the corrected rotating speed of the fan is A4 x B4;
when t is more than or equal to F01 and less than F02, selecting a third preset fan rotating speed correction coefficient B3 to correct the third preset fan rotating speed A3, wherein the corrected rotating speed of the fan is A3 x B3;
when the t is more than or equal to F02 and less than F03, selecting a second preset fan rotating speed correction coefficient B2 to correct the second preset fan rotating speed A2, wherein the corrected rotating speed of the fan is A2 x B2;
and when t is more than or equal to F03 and less than F04, selecting the first preset fan rotating speed correction coefficient B1 to correct the first preset fan rotating speed A1, wherein the corrected rotating speed of the fan is A1 × B1.
In some embodiments of the application, the first detecting unit is further configured to detect a liquid inlet hydraulic pressure value K of the coolant in the liquid inlet pipe in real time t ；
The second detection unit is also used for detecting the liquid outlet hydraulic pressure value K of the cooling liquid in the liquid outlet pipe in real time U ；
The calculation unit is also used for calculating the liquid inlet hydraulic pressure value K according to t And the hydraulic value K of the liquid outlet U Calculating a pressure difference X, wherein X = K t -K U；
The control unit is also used for controlling and adjusting the rotating speed N0 of the fan according to the pressure difference X;
a preset pressure difference matrix V0 and a preset fan rotating speed secondary correction coefficient matrix C are also set in the control unit, and C (C1, C2, C3, C4) is set for the preset fan rotating speed secondary correction coefficient matrix C, wherein C1 is a first preset fan rotating speed secondary correction coefficient, C2 is a second preset fan rotating speed secondary correction coefficient, C3 is a third preset fan rotating speed secondary correction coefficient, C4 is a fourth preset fan rotating speed secondary correction coefficient, and C1 is more than 0.6, C2 is more than C3, and C4 is more than 1.6;
setting V0 (V01, V02, V03, V04) for the preset pressure difference matrix V0, wherein V01 is a first preset pressure difference, V02 is a second preset pressure difference, V03 is a third preset pressure difference, V04 is a fourth preset pressure difference, and V01 is greater than V02 and less than V03 and less than V04;
the control unit is used for selecting a corresponding correction coefficient according to the relation between the X and the preset pressure difference matrix V0 so as to correct the rotating speed of the fan again;
when X is less than V01, selecting a second correction coefficient C4 of the fourth preset fan rotating speed to correct the fourth preset fan rotating speed A4 again, wherein the corrected rotating speed of the fan is A4B 4C 4;
when the V01 is more than or equal to X and less than V02, selecting a third preset fan rotating speed secondary correction coefficient C3 to correct the third preset fan rotating speed A3 again, wherein the corrected rotating speed of the fan is A3X B3X C3;
when the V02 is less than or equal to X and less than V03, selecting a second preset fan rotating speed secondary correction coefficient C2 to correct the second preset fan rotating speed A2 again, wherein the corrected rotating speed of the fan is A2X B2X C2;
and when the V03 is less than or equal to X and less than V04, selecting the second correction coefficient C1 of the first preset fan rotating speed to correct the first preset fan rotating speed A1 again, wherein the corrected rotating speed of the fan is A1B 1C 1.
In some embodiments of the present application, a preset gas charging volume matrix Y0 and a preset fan operating time matrix d are further set in the control unit, and for the preset fan operating time matrix d, d (d 1, d2, d3, d 4) is set, where d1 is a first preset fan operating time, d2 is a second preset fan operating time, d3 is a third preset fan operating time, d4 is a fourth preset fan operating time, and d1 < d2 < d3 < d4;
setting Y0 (Y01, Y02, Y03, Y04) for the preset gas filling volume matrix Y0, wherein Y01 is a first preset gas filling volume, Y02 is a second preset gas filling volume, Y03 is a third preset gas filling volume, Y04 is a fourth preset gas filling volume, and Y01 < Y02 < Y03 < Y04;
the control unit is further used for selecting corresponding fan working time as the fan working time according to the relation between Q and the preset gas charging volume matrix Y0;
when Q is less than Y01, selecting the first preset fan working time d1 as the working time of the fan;
when the Y01 is more than or equal to the Q and less than the Y02, selecting the second preset fan working time d2 as the working time of the fan;
when the Y02 is not less than Q and is less than Y03, selecting the third preset fan working time d3 as the working time of the fan;
and when the Q is more than or equal to Y03 and less than Y04, selecting the fourth preset fan working time d4 as the working time of the fan.
In order to achieve the above object, the present invention also provides a method for controlling a silicon carbide sintering furnace, which is applied to a control system of the silicon carbide sintering furnace, and comprises:
detecting the liquid inlet temperature J1 of the cooling liquid in the liquid inlet pipe and the liquid outlet temperature J2 of the cooling liquid in the liquid outlet pipe in real time;
acquisition at t 0 The flow rate value W1 of the cooling liquid at the time and at t 0 A flow rate value W2 of the coolant at the +1 time;
detecting the volume Q of the gas rapidly filled into the furnace body in real time;
calculating a heat absorption speed value P0 taken away from the furnace body by the cooling liquid according to the liquid inlet temperature J1, the liquid outlet temperature J2 and the flow value of the cooling liquid passing through the cooling pipe in real time;
controlling the rotating speed N0 of the fan according to the heat absorption speed value P0;
wherein the heat absorption speed value P0 is obtained according to the following formula:
P0=(J2-J1)*（W2-W1）*M*C；
wherein M is the mass of the coolant per unit volume, and C is the specific heat capacity of the coolant.
In some embodiments of the present application, a preset heat absorption speed value matrix T0 and a preset fan rotational speed matrix a are set, for which a (A1, A2, A3, A4) is set, wherein A1 is a first preset fan rotational speed, A2 is a second preset fan rotational speed, A3 is a third preset fan rotational speed, A4 is a fourth preset fan rotational speed, and A1 < A2 < A3 < A4;
setting T0 (T01, T02, T03, T04) for the preset heat absorption speed value matrix T0, wherein T01 is a first preset heat absorption speed value, T02 is a second preset heat absorption speed value, T03 is a third preset heat absorption speed value, T04 is a fourth preset heat absorption speed value, and T01 is more than T02 and more than T03 and more than T04;
selecting a corresponding fan rotating speed as the rotating speed of the fan according to the relation between the P0 and the preset heat absorption speed value matrix T0;
when P0 is less than T01, selecting the fourth preset fan rotating speed A4 as the rotating speed of the fan;
when the T01 is more than or equal to P0 and less than T02, selecting the third preset fan rotating speed A3 as the rotating speed of the fan;
when the T02 is more than or equal to P0 and less than T03, selecting the second preset fan rotating speed A2 as the rotating speed of the fan;
and when the T03 is more than or equal to P0 and less than T04, selecting the first preset fan rotating speed A1 as the rotating speed of the fan.
In some embodiments of the present application, further comprising:
detecting the indoor temperature t in the heat preservation room in real time;
controlling and adjusting the rotating speed N0 of the fan according to the indoor temperature t;
setting a preset indoor temperature matrix F0 of the heat preservation chamber and a preset fan rotating speed correction coefficient matrix B, and setting B (B1, B2, B3, B4) for the preset fan rotating speed correction coefficient matrix B, wherein B1 is a first preset fan rotating speed correction coefficient, B2 is a second preset fan rotating speed correction coefficient, B3 is a third preset fan rotating speed correction coefficient, B4 is a fourth preset fan rotating speed correction coefficient, and B1 is more than 0.8, more than B2, more than B3, more than B4 and less than 1.2; setting F0 (F01, F02, F03, F04) for the preset heat preservation chamber indoor temperature matrix F0, wherein F01 is the first preset heat preservation chamber indoor temperature, F02 is the second preset heat preservation chamber indoor temperature, F03 is the third preset heat preservation chamber indoor temperature, F04 is the fourth preset heat preservation chamber indoor temperature, and F01 is greater than F02 and less than F03 and less than F04;
selecting a corresponding fan rotating speed correction coefficient according to the relation between t and the preset temperature matrix F0 in the heat preservation chamber to correct the rotating speed of the fan;
when t is less than F01, selecting a fourth preset fan rotating speed correction coefficient B4 to correct the fourth preset fan rotating speed A4, wherein the corrected rotating speed of the fan is A4 x B4;
when t is more than or equal to F01 and less than F02, selecting a third preset fan rotating speed correction coefficient B3 to correct the third preset fan rotating speed A3, wherein the corrected rotating speed of the fan is A3 x B3;
when the t is more than or equal to F02 and less than F03, selecting a second preset fan rotating speed correction coefficient B2 to correct the second preset fan rotating speed A2, wherein the corrected rotating speed of the fan is A2 x B2;
and when t is more than or equal to F03 and less than F04, selecting the first preset fan rotating speed correction coefficient B1 to correct the first preset fan rotating speed A1, wherein the corrected rotating speed of the fan is A1 × B1.
In some embodiments of the present application, further comprising:
real-time detection liquid inlet hydraulic value K of cooling liquid in liquid inlet pipe t And the hydraulic value K of the cooling liquid in the liquid outlet pipe U ；
According to the liquid inlet hydraulic pressure value K t And the hydraulic value K of the liquid outlet U Calculating a pressure difference X, wherein X = K t -K U；
Controlling and adjusting the rotating speed N0 of the fan according to the pressure difference X;
setting a preset pressure difference matrix V0 and a preset fan rotating speed secondary correction coefficient matrix C, and setting C (C1, C2, C3, C4) for the preset fan rotating speed secondary correction coefficient matrix C, wherein C1 is a first preset fan rotating speed secondary correction coefficient, C2 is a second preset fan rotating speed secondary correction coefficient, C3 is a third preset fan rotating speed secondary correction coefficient, C4 is a fourth preset fan rotating speed secondary correction coefficient, and C1 is more than 0.6 and more than C2 and more than C3 and more than C4 and less than 1.6;
setting V0 (V01, V02, V03, V04) for the preset pressure difference matrix V0, wherein V01 is a first preset pressure difference, V02 is a second preset pressure difference, V03 is a third preset pressure difference, V04 is a fourth preset pressure difference, and V01 is greater than V02 and less than V03 and less than V04;
selecting a corresponding correction coefficient according to the relation between the X and the preset pressure difference matrix V0 to correct the rotating speed of the fan again;
when X is less than V01, selecting a second correction coefficient C4 of the fourth preset fan rotating speed to correct the fourth preset fan rotating speed A4 again, wherein the corrected rotating speed of the fan is A4B 4C 4;
when the V01 is less than or equal to X and less than V02, selecting a second correction coefficient C3 of the third preset fan rotating speed to correct the third preset fan rotating speed A3 again, wherein the corrected rotating speed of the fan is A3X B3X C3;
when the V02 is less than or equal to X and less than V03, selecting a second preset fan rotating speed secondary correction coefficient C2 to correct the second preset fan rotating speed A2 again, wherein the corrected rotating speed of the fan is A2X B2X C2;
and when the V03 is less than or equal to X and less than V04, selecting the second correction coefficient C1 of the first preset fan rotating speed to correct the first preset fan rotating speed A1 again, wherein the corrected rotating speed of the fan is A1B 1C 1.
In some embodiments of the present application, a preset gas charge volume matrix Y0 and a preset fan operation time matrix d are set, and for the preset fan operation time matrix d, d (d 1, d2, d3, d 4) is set, where d1 is a first preset fan operation time, d2 is a second preset fan operation time, d3 is a third preset fan operation time, d4 is a fourth preset fan operation time, and d1 < d2 < d3 < d4;
setting Y0 (Y01, Y02, Y03, Y04) for the preset gas filling volume matrix Y0, wherein Y01 is a first preset gas filling volume, Y02 is a second preset gas filling volume, Y03 is a third preset gas filling volume, Y04 is a fourth preset gas filling volume, and Y01 < Y02 < Y03 < Y04;
selecting corresponding fan working time as the working time of the fan according to the relation between Q and the preset gas filling volume matrix Y0;
when Q is less than Y01, selecting the first preset fan working time d1 as the working time of the fan;
when the Y01 is more than or equal to the Q and less than the Y02, selecting the second preset fan working time d2 as the working time of the fan;
when the Q is more than or equal to Y02 and less than Y03, selecting the third preset fan working time d3 as the working time of the fan;
and when the Q is more than or equal to Y03 and less than Y04, selecting the fourth preset fan working time d4 as the working time of the fan.
The invention provides a control system and a method of a silicon carbide sintering furnace, compared with the prior art, the control system has the following beneficial effects:
according to the invention, the heat absorption speed value of the cooling liquid taken away from the furnace body is calculated by detecting the parameters such as the liquid inlet temperature of the cooling liquid, the liquid outlet temperature of the cooling liquid, the flow value of the cooling liquid and the like, and the rotating speed of the fan is controlled based on the heat absorption speed value, so that the controllable automatic regulation of the furnace is realized, and the rotating speed of the fan is corrected and regulated based on the parameters such as the heat loss of the heat preservation chamber, so that the more accurate cooling control of the furnace by the fan is realized. In addition, the working time of the fan is controlled based on the gas charging volume, so that the temperature of the sintering furnace can be efficiently reduced, and the energy consumption can be reduced. The invention has the advantages of high automation degree, strong working efficiency, cost saving and the like.
Drawings
FIG. 1 is a functional block diagram of a control system of the silicon carbide sintering furnace of the present invention;
FIG. 2 is a flowchart of a method of controlling the silicon carbide sintering furnace according to the present invention.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or both elements may be in communication inside each other. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the prior art, when the sintering furnace is used for sintering silicon carbide, because the control of the temperature is inaccurate, the sintered finished product has the defects of cracks and the like, and further the mechanical property of the silicon carbide can be influenced.
Therefore, the control system of the silicon carbide sintering furnace provided by the invention can be used for calculating the heat absorption speed value taken away by the cooling liquid from the furnace body based on the liquid inlet temperature, the liquid outlet temperature and the flow value of the cooling liquid, and further realizing the rapid cooling of the silicon carbide sintering furnace by controlling the rotating speed of the fan, thereby not only realizing the efficient cooling effect, but also accurately enabling the temperature in the sintering furnace to reach the preset range, and fundamentally avoiding the unnecessary energy waste of the fan.
Referring to fig. 1, a disclosed embodiment of the present invention provides a control system of a silicon carbide sintering furnace, including:
the furnace body is internally provided with a heat preservation chamber;
the cooling pipe is arranged in the furnace body, one end of the cooling pipe is connected with a liquid inlet pipe for introducing cooling liquid, and the other end of the cooling pipe is connected with a liquid outlet pipe for discharging the cooling liquid;
the fan is arranged in the furnace body;
further comprising:
the first detection unit is used for detecting the liquid inlet temperature J1 of the cooling liquid in the liquid inlet pipe in real time;
the second detection unit is used for detecting the liquid outlet temperature J2 of the cooling liquid in the liquid outlet pipe in real time;
a flow detection unit for collecting at t 0 Flow rate value W1 of coolant at time t 0 The flow rate value W2 of the coolant at the time + 1;
the gas detection unit is used for detecting the volume Q of gas rapidly filled into the furnace body in real time;
the calculation unit is used for calculating a heat absorption speed value P0 of the cooling liquid in the cooling pipe taken away from the furnace body according to the liquid inlet temperature J1, the liquid outlet temperature J2 and the flow value of the cooling liquid passing through the cooling pipe in real time;
the control unit is used for controlling the rotating speed N0 of the fan according to the heat absorption speed value P0;
wherein the heat absorption speed value P0 is obtained according to the following formula:
P0=(J2-J1)*（W2-W1）*M*C；
wherein M is the mass of the coolant per unit volume, and C is the specific heat capacity of the coolant.
It can be understood that, can audio-visually judge the temperature change in the stove based on the heat absorption speed value, through the rotational speed increase of control fan, can realize that the heat exchange efficiency of the air in the stove body is higher, reaches the effect that improves cooling efficiency promptly, and simultaneously, the whole process is realized based on automated control completely, has high efficiency and accuracy.
In one embodiment of the present application, a preset heat absorption speed value matrix T0 and a preset fan rotation speed matrix a are set in the control unit, and for the preset fan rotation speed matrix a, a (A1, A2, A3, A4) is set, where A1 is a first preset fan rotation speed, A2 is a second preset fan rotation speed, A3 is a third preset fan rotation speed, A4 is a fourth preset fan rotation speed, and A1 < A2 < A3 < A4;
setting T0 (T01, T02, T03, T04) for a preset heat absorption speed value matrix T0, wherein T01 is a first preset heat absorption speed value, T02 is a second preset heat absorption speed value, T03 is a third preset heat absorption speed value, T04 is a fourth preset heat absorption speed value, and T01 is more than T02 and more than T03 and more than T04;
the control unit is used for selecting the corresponding fan rotating speed as the rotating speed of the fan according to the relation between the P0 and the preset heat absorption speed value matrix T0;
when P0 is less than T01, selecting a fourth preset fan rotating speed A4 as the rotating speed of the fan;
when the T01 is more than or equal to P0 and less than T02, selecting a third preset fan rotating speed A3 as the rotating speed of the fan;
when the T02 is more than or equal to P0 and less than T03, selecting a second preset fan rotating speed A2 as the rotating speed of the fan;
and when the T03 is more than or equal to P0 and less than T04, selecting a first preset fan rotating speed A1 as the rotating speed of the fan.
It can be understood that when the heat absorption speed value is smaller, it indicates that the heat taken away by the actual cooling liquid is lower, and the cooling speed is lower, and further the fan 6 is controlled to increase to the preset rotating speed, and when the preset heat absorption speed value is larger, it indicates that the heat taken away by the actual cooling liquid is higher, and the cooling speed is higher, and further the fan is controlled to reduce to the preset rotating speed, so as to realize the automatic control and regulation of the furnace body temperature cooling speed.
In a specific embodiment of the present application, the method further includes:
the third detection unit is used for detecting the indoor temperature t in the heat preservation chamber in real time;
the control unit is also used for controlling and adjusting the rotating speed N0 of the fan according to the indoor temperature t;
the control unit is also internally provided with a preset temperature matrix F0 in the heat preservation chamber and a preset fan rotating speed correction coefficient matrix B, and B (B1, B2, B3, B4) is set for the preset fan rotating speed correction coefficient matrix B, wherein B1 is a first preset fan rotating speed correction coefficient, B2 is a second preset fan rotating speed correction coefficient, B3 is a third preset fan rotating speed correction coefficient, B4 is a fourth preset fan rotating speed correction coefficient, and B1 is more than 0.8, B2 is more than B2, B3 is more than B4 and less than 1.2; setting F0 (F01, F02, F03, F04) for a preset heat preservation chamber indoor temperature matrix F0, wherein F01 is a first preset heat preservation chamber indoor temperature, F02 is a second preset heat preservation chamber indoor temperature, F03 is a third preset heat preservation chamber indoor temperature, F04 is a fourth preset heat preservation chamber indoor temperature, and F01 is greater than F02 and less than F03 and less than F04;
the detection unit is used for selecting a corresponding fan rotating speed correction coefficient according to the relation between t and a preset temperature matrix F0 in the heat preservation chamber so as to correct the rotating speed of the fan;
when t is less than F01, selecting a fourth preset fan rotating speed correction coefficient B4 to correct a fourth preset fan rotating speed A4, wherein the corrected rotating speed of the fan is A4 x B4;
when the t is more than or equal to F01 and less than F02, selecting a third preset fan rotating speed correction coefficient B3 to correct a third preset fan rotating speed A3, wherein the corrected rotating speed of the fan is A3 x B3;
when the t is more than or equal to F02 and less than F03, selecting a second preset fan rotating speed correction coefficient B2 to correct a second preset fan rotating speed A2, wherein the corrected rotating speed of the fan is A2 x B2;
and when the t is more than or equal to F03 and less than F04, selecting a first preset fan rotating speed correction coefficient B1 to correct the first preset fan rotating speed A1, wherein the corrected rotating speed of the fan is A1 × B1.
It can be understood that the heat preservation chamber can influence the heat of the cooling liquid certainly, therefore, the fan rotating speed is adjusted through real-time coefficient correction based on the indoor temperature in the heat preservation chamber, and the accuracy of the cooling temperature is improved.
In this applicationIn an embodiment of the present invention, the first detecting unit is further configured to detect a feed liquid pressure value K of the cooling liquid in the feed liquid pipe in real time t ；
The second detection unit is also used for detecting the liquid outlet hydraulic pressure value K of the cooling liquid in the liquid outlet pipe in real time U ；
The calculation unit is also used for calculating the liquid inlet hydraulic value K t And hydraulic value K of discharged liquid U Calculating a pressure difference X, wherein X = K t -K U；
The control unit is also used for controlling and adjusting the rotating speed N0 of the fan according to the pressure difference X;
a preset pressure difference matrix V0 and a preset fan rotating speed secondary correction coefficient matrix C are also set in the control unit, and C (C1, C2, C3, C4) is set for the preset fan rotating speed secondary correction coefficient matrix C, wherein C1 is a first preset fan rotating speed secondary correction coefficient, C2 is a second preset fan rotating speed secondary correction coefficient, C3 is a third preset fan rotating speed secondary correction coefficient, C4 is a fourth preset fan rotating speed secondary correction coefficient, and C1 is more than 0.6, C2 is more than C3, and C4 is more than C4 is less than 1.6;
for the preset pressure difference matrix V0, setting V0 (V01, V02, V03, V04), wherein V01 is a first preset pressure difference, V02 is a second preset pressure difference, V03 is a third preset pressure difference, V04 is a fourth preset pressure difference, and V01 is more than V02 and less than V03 and less than V04;
the control unit is used for selecting a corresponding correction coefficient according to the relation between the X and the preset pressure difference matrix V0 so as to correct the rotating speed of the fan again;
when X is less than V01, selecting a fourth preset fan rotating speed secondary correction coefficient C4 to correct a fourth preset fan rotating speed A4 again, wherein the corrected rotating speed of the fan is A4X B4X C4;
when the V01 is less than or equal to X and less than V02, selecting a third preset fan rotating speed secondary correction coefficient C3 to correct the third preset fan rotating speed A3 again, wherein the corrected rotating speed of the fan is A3X B3X C3;
when V02 is less than or equal to X and less than V03, selecting a second preset fan rotating speed secondary correction coefficient C2 to correct the second preset fan rotating speed A2 again, wherein the corrected rotating speed of the fan is A2X B2X C2;
and when the V03 is more than or equal to X and less than V04, selecting a first preset fan rotating speed secondary correction coefficient C1 to correct the first preset fan rotating speed A1 again, wherein the corrected rotating speed of the fan is A1 × B1 × C1.
It can be understood that the feed liquor of coolant liquid and the hydraulic pressure differential that goes out the liquid production can directly lead to the cooling effect in leading to the furnace body, when hydraulic pressure differential is too big, can impact the influence to the pipeline production of cooling tube, and pressure differential is too big proves that the stove internal temperature is too high, therefore, need increase fan rotational speed to make stove rapid cooling, when hydraulic pressure differential is too little, can exert an influence to the pipeline cooling effect of cooling tube, and the pressure differential undersize proves that the stove internal temperature is lower, therefore, need reduce fan rotational speed, prevent to produce unnecessary energy resource consumption.
In a specific embodiment of the application, a preset gas charging volume matrix Y0 and a preset fan working time matrix d are further set in the control unit, and for the preset fan working time matrix d, d (d 1, d2, d3, d 4) is set, where d1 is a first preset fan working time, d2 is a second preset fan working time, d3 is a third preset fan working time, d4 is a fourth preset fan working time, and d1 < d2 < d3 < d4;
setting Y0 (Y01, Y02, Y03, Y04) for a preset gas filling volume matrix Y0, wherein Y01 is a first preset gas filling volume, Y02 is a second preset gas filling volume, Y03 is a third preset gas filling volume, Y04 is a fourth preset gas filling volume, and Y01 < Y02 < Y03 < Y04;
the control unit is also used for selecting corresponding fan working time as the fan working time according to the relation between Q and a preset gas charging volume matrix Y0;
when Q is less than Y01, selecting first preset fan working time d1 as the working time of the fan;
when the Y01 is more than or equal to the Q and less than the Y02, selecting the second preset fan working time d2 as the working time of the fan;
when the Y02 is less than or equal to Q and less than Y03, selecting the third preset fan working time d3 as the working time of the fan;
and when the Y03 is more than or equal to Q and less than Y04, selecting the fourth preset fan working time d4 as the working time of the fan.
It can be understood that the working time of the fan is adjusted in real time according to the charging volume of the gas, so that the cooling of the furnace can be completed, and the problem of large energy consumption caused by long-time continuous work of the fan is solved.
Based on the same technical concept, referring to fig. 2, the present invention also provides a method for controlling a silicon carbide sintering furnace, which is applied to a control system of the silicon carbide sintering furnace, and comprises:
detecting the liquid inlet temperature J1 of the cooling liquid in the liquid inlet pipe and the liquid outlet temperature J2 of the cooling liquid in the liquid outlet pipe in real time;
collected at t 0 Flow rate value W1 of coolant at time t 0 The flow rate value W2 of the coolant at the time + 1;
detecting the volume Q of the gas rapidly filled into the furnace body in real time;
calculating a heat absorption speed value P0 of the cooling liquid taken away from the furnace body according to the liquid inlet temperature J1, the liquid outlet temperature J2 and the flow value of the cooling liquid passing through the cooling pipe in real time;
controlling the rotating speed N0 of the fan according to the heat absorption speed value P0;
wherein the heat absorption speed value P0 is obtained according to the following formula:
P0=(J2-J1)*（W2-W1）*M*C；
wherein M is the mass of the coolant per unit volume, and C is the specific heat capacity of the coolant.
It can be understood that the temperature change in the stove can be judged visually based on the heat absorption speed value, the higher the heat exchange efficiency of the air in the stove can be realized by controlling the increase of the rotating speed of the fan, the effect of improving the cooling efficiency can be achieved, and meanwhile, the whole process is realized completely based on automatic control, and the high efficiency and the accuracy are realized.
In one embodiment of the present application, a preset heat absorption speed value matrix T0 and a preset fan rotational speed matrix a are set, and for the preset fan rotational speed matrix a, a (A1, A2, A3, A4) is set, where A1 is a first preset fan rotational speed, A2 is a second preset fan rotational speed, A3 is a third preset fan rotational speed, A4 is a fourth preset fan rotational speed, and A1 < A2 < A3 < A4;
setting T0 (T01, T02, T03, T04) for a preset heat absorption speed value matrix T0, wherein T01 is a first preset heat absorption speed value, T02 is a second preset heat absorption speed value, T03 is a third preset heat absorption speed value, T04 is a fourth preset heat absorption speed value, and T01 is more than T02 and more than T03 and more than T04;
selecting corresponding fan rotating speed as the rotating speed of the fan according to the relation between the P0 and a preset heat absorption speed value matrix T0;
when P0 is less than T01, selecting a fourth preset fan rotating speed A4 as the rotating speed of the fan;
when the T01 is more than or equal to P0 and less than T02, selecting a third preset fan rotating speed A3 as the rotating speed of the fan;
when the T02 is more than or equal to P0 and less than T03, selecting a second preset fan rotating speed A2 as the rotating speed of the fan;
and when the T03 is more than or equal to P0 and less than T04, selecting a first preset fan rotating speed A1 as the rotating speed of the fan.
It can be understood that when the heat absorption speed value is smaller, it is indicated that the heat taken away by the actual cooling liquid is lower, and the cooling speed is slower, so that the fan 6 is controlled to increase to the preset rotating speed, and when the preset heat absorption speed value is larger, it is indicated that the heat taken away by the actual cooling liquid is higher, and the cooling speed is faster, so that the fan is controlled to reduce to the preset rotating speed, and the automatic control and regulation of the furnace body temperature cooling speed are realized.
In a specific embodiment of the present application, the method further includes:
detecting the indoor temperature t in the heat preservation room in real time;
controlling and adjusting the rotating speed N0 of the fan according to the indoor temperature t;
setting a preset indoor temperature matrix F0 of the heat preservation chamber and a preset fan rotating speed correction coefficient matrix B, and setting B (B1, B2, B3 and B4) for the preset fan rotating speed correction coefficient matrix B, wherein B1 is a first preset fan rotating speed correction coefficient, B2 is a second preset fan rotating speed correction coefficient, B3 is a third preset fan rotating speed correction coefficient, B4 is a fourth preset fan rotating speed correction coefficient, and B1 is more than 0.8 and less than B2 and less than B3 and less than B4 and less than 1.2; setting F0 (F01, F02, F03, F04) for a preset heat preservation chamber indoor temperature matrix F0, wherein F01 is a first preset heat preservation chamber indoor temperature, F02 is a second preset heat preservation chamber indoor temperature, F03 is a third preset heat preservation chamber indoor temperature, F04 is a fourth preset heat preservation chamber indoor temperature, and F01 is more than F02 and less than F03 and less than F04;
selecting a corresponding fan rotating speed correction coefficient according to the relation between t and a preset indoor temperature matrix F0 of the heat preservation chamber so as to correct the rotating speed of the fan;
when t is less than F01, selecting a fourth preset fan rotating speed correction coefficient B4 to correct a fourth preset fan rotating speed A4, wherein the corrected rotating speed of the fan is A4 x B4;
when t is more than or equal to F01 and less than F02, selecting a third preset fan rotating speed correction coefficient B3 to correct a third preset fan rotating speed A3, wherein the corrected rotating speed of the fan is A3 x B3;
when the t is more than or equal to F02 and less than F03, selecting a second preset fan rotating speed correction coefficient B2 to correct a second preset fan rotating speed A2, wherein the corrected rotating speed of the fan is A2 x B2;
and when the t is more than or equal to F03 and less than F04, selecting a first preset fan rotating speed correction coefficient B1 to correct the first preset fan rotating speed A1, wherein the corrected rotating speed of the fan is A1 × B1.
It can be understood that the heat preservation chamber can influence the heat of the cooling liquid certainly, therefore, the fan rotating speed is adjusted through real-time coefficient correction based on the indoor temperature in the heat preservation chamber, and the accuracy of the cooling temperature is improved.
In a specific embodiment of the present application, the method further includes:
liquid inlet hydraulic value K of cooling liquid in liquid inlet pipe for real-time detection t And the hydraulic value K of the cooling liquid in the liquid outlet pipe U ；
According to the liquid pressure value K of the inlet liquid t Hydraulic value K of mixing liquid U Calculating a pressure difference X, wherein X = K t -K U；
Controlling and adjusting the rotating speed N0 of the fan according to the pressure difference X;
setting a preset pressure difference matrix V0 and a preset fan rotating speed secondary correction coefficient matrix C, and setting C (C1, C2, C3, C4) for the preset fan rotating speed secondary correction coefficient matrix C, wherein C1 is a first preset fan rotating speed secondary correction coefficient, C2 is a second preset fan rotating speed secondary correction coefficient, C3 is a third preset fan rotating speed secondary correction coefficient, C4 is a fourth preset fan rotating speed secondary correction coefficient, and C1 is more than 0.6, C2 is more than C3, and C4 is less than 1.6;
for the preset pressure difference matrix V0, setting V0 (V01, V02, V03, V04), wherein V01 is a first preset pressure difference, V02 is a second preset pressure difference, V03 is a third preset pressure difference, V04 is a fourth preset pressure difference, and V01 is more than V02 and less than V03 and less than V04;
selecting a corresponding correction coefficient according to the relation between the X and the preset pressure difference matrix V0 to correct the rotating speed of the fan again;
when X is less than V01, selecting a fourth preset fan rotating speed secondary correction coefficient C4 to correct a fourth preset fan rotating speed A4 again, wherein the corrected rotating speed of the fan is A4X B4X C4;
when the V01 is more than or equal to X and less than V02, selecting a third preset fan rotating speed secondary correction coefficient C3 to correct the third preset fan rotating speed A3 again, wherein the corrected rotating speed of the fan is A3X B3X C3;
when V02 is larger than or equal to X and smaller than V03, selecting a second preset fan rotating speed secondary correction coefficient C2 to correct the second preset fan rotating speed A2 again, wherein the corrected rotating speed of the fan is A2X B2X C2;
and when the V03 is more than or equal to X and less than V04, selecting a first preset fan rotating speed secondary correction coefficient C1 to correct the first preset fan rotating speed A1 again, wherein the corrected rotating speed of the fan is A1 × B1 × C1.
It can be understood that the feed liquor of coolant liquid and the hydraulic pressure differential that goes out the liquid production can directly lead to the cooling effect in leading to the furnace body, when hydraulic pressure differential is too big, can impact the influence to the pipeline production of cooling tube, and pressure differential is too big proves that the stove internal temperature is too high, therefore, need increase fan rotational speed to make stove rapid cooling, when hydraulic pressure differential is too little, can exert an influence to the pipeline cooling effect of cooling tube, and the pressure differential undersize proves that the stove internal temperature is lower, therefore, need reduce fan rotational speed, prevent to produce unnecessary energy resource consumption.
In one embodiment of the present application, a preset gas charge volume matrix Y0 and a preset fan operating time matrix d are set, and for the preset fan operating time matrix d, d (d 1, d2, d3, d 4) is set, where d1 is a first preset fan operating time, d2 is a second preset fan operating time, d3 is a third preset fan operating time, d4 is a fourth preset fan operating time, and d1 < d2 < d3 < d4;
setting Y0 (Y01, Y02, Y03, Y04) for a preset gas filling volume matrix Y0, wherein Y01 is a first preset gas filling volume, Y02 is a second preset gas filling volume, Y03 is a third preset gas filling volume, Y04 is a fourth preset gas filling volume, and Y01 < Y02 < Y03 < Y04;
selecting corresponding fan working time as the working time of the fan according to the relation between Q and a preset gas filling volume matrix Y0;
when Q is less than Y01, selecting the first preset fan working time d1 as the working time of the fan;
when the Y01 is more than or equal to Q and is less than Y02, selecting the second preset fan working time d2 as the working time of the fan;
when the Y02 is less than or equal to Q and less than Y03, selecting the third preset fan working time d3 as the working time of the fan;
and when the Y03 is more than or equal to Q and less than Y04, selecting the fourth preset fan working time d4 as the working time of the fan.
It can be understood that the working time of the fan is adjusted in real time according to the gas charging volume, so that the cooling of the furnace can be completed, and the problem of large energy consumption caused by long-time continuous work of the fan is solved.
According to the first technical concept of the invention, the rotating speed of the fan is adjusted and controlled in real time by detecting parameters such as the liquid inlet temperature of the cooling liquid, the liquid outlet temperature of the cooling liquid, the flow value of the cooling liquid and the like in real time, and the controllable cooling is effectively realized by utilizing the circulation of gas in the furnace and taking away heat through the cooling water based on different rotating speeds of the fan.
According to the second technical concept of the invention, the working time of the fan is adjusted in real time according to the gas charging volume, so that the cooling in the furnace can be completed, and the problem of large energy consumption caused by long-time continuous working of the fan is solved.
In conclusion, the invention calculates the heat absorption speed value of the cooling liquid taken away from the furnace body by detecting the parameters such as the liquid inlet temperature of the cooling liquid, the liquid outlet temperature of the cooling liquid, the flow value of the cooling liquid and the like, controls the rotating speed of the fan based on the heat absorption speed value, thereby realizing the controllable automatic regulation of the furnace, and corrects and regulates the rotating speed of the fan based on the parameters such as the heat loss of the heat preservation chamber and the like, thereby realizing the more accurate control of the temperature reduction of the fan in the furnace. In addition, the working time of the fan is controlled based on the gas charging volume, so that the temperature of the sintering furnace can be efficiently reduced, and the energy consumption can be reduced. The invention has the advantages of high automation degree, strong working efficiency, cost saving and the like.
The above description is only an embodiment of the present invention, but not intended to limit the scope of the present invention, and any structural changes made according to the present invention should be considered as being limited within the scope of the present invention without departing from the spirit of the present invention.
It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working process and related description of the system described above may refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.
It should be noted that, the system provided in the foregoing embodiment is only illustrated by dividing the functional modules, and in practical applications, the functions may be distributed by different functional modules according to needs, that is, the modules or steps in the embodiments of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not to be construed as unduly limiting the present invention.
Those of skill in the art would appreciate that the various illustrative modules, method steps, and programs described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the software modules, method steps, and corresponding programs may be located in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. To clearly illustrate this interchangeability of electronic hardware and software, various illustrative components and steps have been described above generally in terms of their functionality. Whether these functions are performed in electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (10)

1. A control system for a silicon carbide sintering furnace, comprising:
the furnace body is internally provided with a heat preservation chamber;
the cooling pipe is arranged in the furnace body, one end of the cooling pipe is connected with a liquid inlet pipe for introducing cooling liquid, and the other end of the cooling pipe is connected with a liquid outlet pipe for discharging the cooling liquid;
the fan is arranged in the furnace body;
further comprising:
the first detection unit is used for detecting the liquid inlet temperature J1 of the cooling liquid in the liquid inlet pipe in real time;
the second detection unit is used for detecting the liquid outlet temperature J2 of the cooling liquid in the liquid outlet pipe in real time;
a flow detection unit for collecting at t 0 The flow rate value W1 of the cooling liquid at the time and at t 0 A flow rate value W2 of the coolant at the +1 time;
the gas detection unit is used for detecting the volume Q of gas rapidly filled into the furnace body in real time;
the calculation unit is used for calculating a heat absorption speed value P0 of the cooling liquid in the cooling pipe taken away from the furnace body according to the liquid inlet temperature J1, the liquid outlet temperature J2 and the flow value of the cooling liquid passing through the cooling pipe in real time;
the control unit is used for controlling the rotating speed N0 of the fan according to the heat absorption speed value P0;
wherein the heat absorption speed value P0 is obtained according to the following formula:
P0=(J2-J1)*（W2-W1）*M*C；
wherein M is the mass of the coolant per unit volume, and C is the specific heat capacity of the coolant.
2. The control system for a silicon carbide sintering furnace according to claim 1,
a preset heat absorption speed value matrix T0 and a preset fan rotating speed matrix A are set in the control unit, and A (A1, A2, A3, A4) is set for the preset fan rotating speed matrix A, wherein A1 is a first preset fan rotating speed, A2 is a second preset fan rotating speed, A3 is a third preset fan rotating speed, A4 is a fourth preset fan rotating speed, and A1 is more than A2 and more than A3 is more than A4;
setting T0 (T01, T02, T03, T04) for the preset heat absorption speed value matrix T0, wherein T01 is a first preset heat absorption speed value, T02 is a second preset heat absorption speed value, T03 is a third preset heat absorption speed value, T04 is a fourth preset heat absorption speed value, and T01 is more than T02 and more than T03 and more than T04;
the control unit is used for selecting the corresponding fan rotating speed as the rotating speed of the fan according to the relation between the P0 and the preset heat absorption speed value matrix T0;
when P0 is less than T01, selecting the fourth preset fan rotating speed A4 as the rotating speed of the fan;
when the T01 is more than or equal to P0 and less than T02, selecting the third preset fan rotating speed A3 as the rotating speed of the fan;
when the T02 is more than or equal to P0 and less than T03, selecting the second preset fan rotating speed A2 as the rotating speed of the fan;
and when the T03 is more than or equal to P0 and less than T04, selecting the first preset fan rotating speed A1 as the rotating speed of the fan.
3. The control system for a silicon carbide sintering furnace as set forth in claim 2, further comprising:
the third detection unit is used for detecting the indoor temperature t in the heat preservation chamber in real time;
the control unit is also used for controlling and adjusting the rotating speed N0 of the fan according to the indoor temperature t;
a preset temperature matrix F0 in the heat preservation chamber and a preset fan rotating speed correction coefficient matrix B are also set in the control unit, and B (B1, B2, B3, B4) is set for the preset fan rotating speed correction coefficient matrix B, wherein B1 is a first preset fan rotating speed correction coefficient, B2 is a second preset fan rotating speed correction coefficient, B3 is a third preset fan rotating speed correction coefficient, B4 is a fourth preset fan rotating speed correction coefficient, and B1 is more than 0.8, B2 is more than B2, B3 is more than B4, and B4 is more than 1.2; setting F0 (F01, F02, F03, F04) for the preset heat preservation chamber indoor temperature matrix F0, wherein F01 is the first preset heat preservation chamber indoor temperature, F02 is the second preset heat preservation chamber indoor temperature, F03 is the third preset heat preservation chamber indoor temperature, F04 is the fourth preset heat preservation chamber indoor temperature, and F01 is greater than F02 and less than F03 and less than F04;
the detection unit is used for selecting a corresponding fan rotating speed correction coefficient according to the relation between t and the preset temperature matrix F0 in the heat preservation chamber so as to correct the rotating speed of the fan;
when t is less than F01, selecting a fourth preset fan rotating speed correction coefficient B4 to correct the fourth preset fan rotating speed A4, wherein the corrected rotating speed of the fan is A4 x B4;
when t is more than or equal to F01 and less than F02, selecting a third preset fan rotating speed correction coefficient B3 to correct the third preset fan rotating speed A3, wherein the corrected rotating speed of the fan is A3 x B3;
when the t is more than or equal to F02 and less than F03, selecting a second preset fan rotating speed correction coefficient B2 to correct the second preset fan rotating speed A2, wherein the corrected rotating speed of the fan is A2 x B2;
and when t is more than or equal to F03 and less than F04, selecting the first preset fan rotating speed correction coefficient B1 to correct the first preset fan rotating speed A1, wherein the corrected rotating speed of the fan is A1 × B1.
4. The control system for a silicon carbide sintering furnace according to claim 3,
first detecting element still is used for real-time detection the feed liquor hydraulic pressure value K of the coolant liquid in the feed liquor pipe t ；
The second detection unit is also used for detecting the liquid outlet hydraulic value K of the cooling liquid in the liquid outlet pipe in real time U ；
The calculation unit is also used for calculating the liquid inlet hydraulic value K according to t And the hydraulic value K of the liquid outlet U Calculating a pressure difference X, wherein X = K t -K U；
The control unit is also used for controlling and adjusting the rotating speed N0 of the fan according to the pressure difference X;
a preset pressure difference matrix V0 and a preset fan rotating speed secondary correction coefficient matrix C are also set in the control unit, and C (C1, C2, C3, C4) is set for the preset fan rotating speed secondary correction coefficient matrix C, wherein C1 is a first preset fan rotating speed secondary correction coefficient, C2 is a second preset fan rotating speed secondary correction coefficient, C3 is a third preset fan rotating speed secondary correction coefficient, C4 is a fourth preset fan rotating speed secondary correction coefficient, and C1 is more than 0.6, C2 is more than C3, and C4 is more than 1.6;
setting V0 (V01, V02, V03, V04) for the preset pressure difference matrix V0, wherein V01 is a first preset pressure difference, V02 is a second preset pressure difference, V03 is a third preset pressure difference, V04 is a fourth preset pressure difference, and V01 is greater than V02 and less than V03 and less than V04;
the control unit is used for selecting a corresponding correction coefficient according to the relation between the X and the preset pressure difference matrix V0 so as to correct the rotating speed of the fan again;
when X is less than V01, selecting a second correction coefficient C4 of the rotation speed of the fourth preset fan to correct the rotation speed A4 of the fourth preset fan again, wherein the corrected rotation speed of the fan is A4X B4X C4;
when the V01 is less than or equal to X and less than V02, selecting a second correction coefficient C3 of the third preset fan rotating speed to correct the third preset fan rotating speed A3 again, wherein the corrected rotating speed of the fan is A3X B3X C3;
when the V02 is more than or equal to X and less than V03, selecting a second preset fan rotating speed secondary correction coefficient C2 to correct the second preset fan rotating speed A2 again, wherein the corrected rotating speed of the fan is A2X B2X C2;
and when the V03 is less than or equal to X and less than V04, selecting the second correction coefficient C1 of the first preset fan rotating speed to correct the first preset fan rotating speed A1 again, wherein the corrected rotating speed of the fan is A1B 1C 1.
5. The control system for a silicon carbide sintering furnace according to claim 1,
a preset gas charging volume matrix Y0 and a preset fan working time matrix d are also set in the control unit, and d (d 1, d2, d3, d 4) is set for the preset fan working time matrix d, wherein d1 is first preset fan working time, d2 is second preset fan working time, d3 is third preset fan working time, d4 is fourth preset fan working time, and d1 is more than d2 and more than d3 and more than d4;
setting Y0 (Y01, Y02, Y03, Y04) for the preset gas filling volume matrix Y0, wherein Y01 is a first preset gas filling volume, Y02 is a second preset gas filling volume, Y03 is a third preset gas filling volume, Y04 is a fourth preset gas filling volume, and Y01 is more than Y02 and less than Y03 and less than Y04;
the control unit is further used for selecting corresponding fan working time as the fan working time according to the relation between Q and the preset gas charging volume matrix Y0;
when Q is less than Y01, selecting the first preset fan working time d1 as the working time of the fan;
when the Y01 is more than or equal to the Q and less than the Y02, selecting the second preset fan working time d2 as the working time of the fan;
when the Y02 is not less than Q and is less than Y03, selecting the third preset fan working time d3 as the working time of the fan;
and when the Q is more than or equal to Y03 and less than Y04, selecting the fourth preset fan working time d4 as the working time of the fan.
6. A method for controlling a silicon carbide sintering furnace, which is applied to a control system for a silicon carbide sintering furnace according to any one of claims 1 to 5, comprising:
detecting the liquid inlet temperature J1 of the cooling liquid in the liquid inlet pipe and the liquid outlet temperature J2 of the cooling liquid in the liquid outlet pipe in real time;
collected at t 0 The flow rate value W1 of the cooling liquid at the time and at t 0 A flow rate value W2 of the coolant at the +1 time;
detecting the volume Q of the gas rapidly filled into the furnace body in real time;
calculating a heat absorption speed value P0 taken away from the furnace body by the cooling liquid according to the liquid inlet temperature J1, the liquid outlet temperature J2 and the flow value of the cooling liquid passing through the cooling pipe in real time;
controlling the rotating speed N0 of the fan according to the heat absorption speed value P0;
wherein the heat absorption speed value P0 is obtained according to the following formula:
P0=(J2-J1)*（W2-W1）*M*C；
wherein M is the mass of the coolant per unit volume, and C is the specific heat capacity of the coolant.
7. The method of controlling a silicon carbide sintering furnace according to claim 6,
setting a preset heat absorption speed value matrix T0 and a preset fan rotating speed matrix A, and setting A (A1, A2, A3, A4) for the preset fan rotating speed matrix A, wherein A1 is a first preset fan rotating speed, A2 is a second preset fan rotating speed, A3 is a third preset fan rotating speed, A4 is a fourth preset fan rotating speed, and A1 is greater than A2 and is greater than A3 and is greater than A4;
setting T0 (T01, T02, T03, T04) for the preset heat absorption speed value matrix T0, wherein T01 is a first preset heat absorption speed value, T02 is a second preset heat absorption speed value, T03 is a third preset heat absorption speed value, T04 is a fourth preset heat absorption speed value, and T01 is more than T02 and more than T03 and more than T04;
selecting a corresponding fan rotating speed as the rotating speed of the fan according to the relation between the P0 and the preset heat absorption speed value matrix T0;
when P0 is less than T01, selecting the fourth preset fan rotating speed A4 as the rotating speed of the fan;
when the T01 is more than or equal to P0 and less than T02, selecting the third preset fan rotating speed A3 as the rotating speed of the fan;
when the T02 is more than or equal to P0 and less than T03, selecting the second preset fan rotating speed A2 as the rotating speed of the fan;
and when the T03 is more than or equal to P0 and less than T04, selecting the first preset fan rotating speed A1 as the rotating speed of the fan.
8. The method of controlling a silicon carbide sintering furnace according to claim 7, further comprising:
detecting the indoor temperature t in the heat preservation chamber in real time;
controlling and adjusting the rotating speed N0 of the fan according to the indoor temperature t;
setting a preset indoor temperature matrix F0 of the heat preservation chamber and a preset fan rotating speed correction coefficient matrix B, and setting B (B1, B2, B3, B4) for the preset fan rotating speed correction coefficient matrix B, wherein B1 is a first preset fan rotating speed correction coefficient, B2 is a second preset fan rotating speed correction coefficient, B3 is a third preset fan rotating speed correction coefficient, B4 is a fourth preset fan rotating speed correction coefficient, and B1 is more than 0.8, more than B2, more than B3, more than B4 and less than 1.2; setting F0 (F01, F02, F03, F04) for the preset heat preservation chamber indoor temperature matrix F0, wherein F01 is the first preset heat preservation chamber indoor temperature, F02 is the second preset heat preservation chamber indoor temperature, F03 is the third preset heat preservation chamber indoor temperature, F04 is the fourth preset heat preservation chamber indoor temperature, and F01 is greater than F02 and less than F03 and less than F04;
selecting a corresponding fan rotating speed correction coefficient according to the relation between t and the preset heat preservation chamber indoor temperature matrix F0 to correct the rotating speed of the fan;
when t is less than F01, selecting a fourth preset fan rotating speed correction coefficient B4 to correct the fourth preset fan rotating speed A4, wherein the corrected rotating speed of the fan is A4 x B4;
when t is more than or equal to F01 and less than F02, selecting a third preset fan rotating speed correction coefficient B3 to correct the third preset fan rotating speed A3, wherein the corrected rotating speed of the fan is A3 x B3;
when the t is more than or equal to F02 and less than F03, selecting a second preset fan rotating speed correction coefficient B2 to correct the second preset fan rotating speed A2, wherein the corrected rotating speed of the fan is A2 x B2;
and when t is more than or equal to F03 and less than F04, selecting the first preset fan rotating speed correction coefficient B1 to correct the first preset fan rotating speed A1, wherein the corrected rotating speed of the fan is A1 × B1.
9. The method of controlling a silicon carbide sintering furnace according to claim 8, further comprising:
detecting the liquid inlet hydraulic value K of the cooling liquid in the liquid inlet pipe in real time t And the hydraulic value K of the cooling liquid in the liquid outlet pipe U ；
According to the liquid inlet hydraulic pressure value K t And the hydraulic value K of the liquid outlet U Calculating a pressure difference X, wherein X = K t -K U；
Controlling and adjusting the rotating speed N0 of the fan according to the pressure difference X;
setting a preset pressure difference matrix V0 and a preset fan rotating speed secondary correction coefficient matrix C, and setting C (C1, C2, C3, C4) for the preset fan rotating speed secondary correction coefficient matrix C, wherein C1 is a first preset fan rotating speed secondary correction coefficient, C2 is a second preset fan rotating speed secondary correction coefficient, C3 is a third preset fan rotating speed secondary correction coefficient, C4 is a fourth preset fan rotating speed secondary correction coefficient, and C1 is more than 0.6 and more than C2 and more than C3 and more than C4 and less than 1.6;
setting V0 (V01, V02, V03, V04) for the preset pressure difference matrix V0, wherein V01 is a first preset pressure difference, V02 is a second preset pressure difference, V03 is a third preset pressure difference, V04 is a fourth preset pressure difference, and V01 is greater than V02 and less than V03 and less than V04;
selecting a corresponding correction coefficient according to the relation between the X and the preset pressure difference matrix V0 to correct the rotating speed of the fan again;
when X is less than V01, selecting a second correction coefficient C4 of the fourth preset fan rotating speed to correct the fourth preset fan rotating speed A4 again, wherein the corrected rotating speed of the fan is A4B 4C 4;
when the V01 is more than or equal to X and less than V02, selecting a third preset fan rotating speed secondary correction coefficient C3 to correct the third preset fan rotating speed A3 again, wherein the corrected rotating speed of the fan is A3X B3X C3;
when the V02 is less than or equal to X and less than V03, selecting a second preset fan rotating speed secondary correction coefficient C2 to correct the second preset fan rotating speed A2 again, wherein the corrected rotating speed of the fan is A2X B2X C2;
and when the V03 is less than or equal to X and less than V04, selecting the second correction coefficient C1 of the first preset fan rotating speed to correct the first preset fan rotating speed A1 again, wherein the corrected rotating speed of the fan is A1B 1C 1.
10. The method of controlling a silicon carbide sintering furnace according to claim 6,
setting a preset gas charging volume matrix Y0 and a preset fan working time matrix d, and setting d (d 1, d2, d3, d 4) for the preset fan working time matrix d, wherein d1 is first preset fan working time, d2 is second preset fan working time, d3 is third preset fan working time, d4 is fourth preset fan working time, and d1 is more than d2 and less than d3 and less than d4;
setting Y0 (Y01, Y02, Y03, Y04) for the preset gas filling volume matrix Y0, wherein Y01 is a first preset gas filling volume, Y02 is a second preset gas filling volume, Y03 is a third preset gas filling volume, Y04 is a fourth preset gas filling volume, and Y01 < Y02 < Y03 < Y04;
selecting corresponding fan working time as the working time of the fan according to the relation between Q and the preset gas filling volume matrix Y0;
when Q is less than Y01, selecting the first preset fan working time d1 as the working time of the fan;
when the Y01 is more than or equal to Q and is less than Y02, selecting the second preset fan working time d2 as the working time of the fan;
when the Y02 is not less than Q and is less than Y03, selecting the third preset fan working time d3 as the working time of the fan;
and when the Q is more than or equal to Y03 and less than Y04, selecting the fourth preset fan working time d4 as the working time of the fan.
CN202211056327.1A 2022-08-31 2022-08-31 Control system and method for silicon carbide sintering furnace Active CN115628620B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211056327.1A CN115628620B (en) 2022-08-31 2022-08-31 Control system and method for silicon carbide sintering furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211056327.1A CN115628620B (en) 2022-08-31 2022-08-31 Control system and method for silicon carbide sintering furnace

Publications (2)

Publication Number Publication Date
CN115628620A true CN115628620A (en) 2023-01-20
CN115628620B CN115628620B (en) 2023-10-10

Family

ID=84901991

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211056327.1A Active CN115628620B (en) 2022-08-31 2022-08-31 Control system and method for silicon carbide sintering furnace

Country Status (1)

Country Link
CN (1) CN115628620B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007051844A (en) * 2005-08-19 2007-03-01 Sanken Sangyo Co Ltd Device and method for cooling vertical furnace for steel
CN109724404A (en) * 2017-10-31 2019-05-07 杭州佰晖科技有限公司 A kind of rate of temperature fall controllable type vacuum sintering furnace and its control method
CN113300027A (en) * 2021-04-19 2021-08-24 江苏大学 Power battery thermal management system based on predictive control and control method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007051844A (en) * 2005-08-19 2007-03-01 Sanken Sangyo Co Ltd Device and method for cooling vertical furnace for steel
CN109724404A (en) * 2017-10-31 2019-05-07 杭州佰晖科技有限公司 A kind of rate of temperature fall controllable type vacuum sintering furnace and its control method
CN113300027A (en) * 2021-04-19 2021-08-24 江苏大学 Power battery thermal management system based on predictive control and control method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
舒立杰;林帅;魏智才;: "软磁材料退火用快速冷却氢气炉的设计", 金属热处理, no. 08 *

Also Published As

Publication number Publication date
CN115628620B (en) 2023-10-10

Similar Documents

Publication Publication Date Title
CN104791891B (en) Superconductive liquid is utilized to carry out the heating radiator dispelled the heat
CN104359195A (en) Central air-conditioner chilled water control method based on dynamic response to tail-end total load changes
CN104807351B (en) Pure counterflow shell-and-tube heat exchanger and manufacturing method thereof
CN115020765B (en) Thermal management control method of fuel cell
CN115628620A (en) Control system and method for silicon carbide sintering furnace
CN103940249A (en) Multiuser-oriented utomatic measuring and controlling energy-saving kiln waste heat utilization system
CN201912936U (en) Esterification reaction kettle for alkyd
CN111146517B (en) Control method of battery formation constant temperature equipment
CN103471427B (en) Finned tube radiator with flow guide structure
JP2012127566A (en) Cooling system
CN216786227U (en) Metal magnesium smelting device adopting full-continuous thermal reduction method
CN216897625U (en) Air-conditioning range hood and air-conditioning module thereof
CN106390880A (en) Cooling water flow calculating method based on dynamic heat-transfer mechanism of reaction vessel
EP2918961B1 (en) Control of a flow of fluid through a heat exchanger
CN111825488A (en) High-efficiency energy-saving fermentation treatment device
CN109507358A (en) The experimental provision and test method of carbonate high-temperature calcination response characteristic under a kind of carbon dioxide atmosphere
CN111780491B (en) Energy-saving air separation cooling system and method
CN105299609B (en) High-temperature heat-tube type high-temperature fusion slag steam generator
CN214582558U (en) Smoke cooling waste heat utilization and dust removal device for submerged arc furnace
CN201429509Y (en) Solar thermal collector test system
CN208201017U (en) A kind of high stove fire Slag treatment device
CN113879077A (en) Air conditioner condenser fan control method based on finished automobile heat load
CN206387294U (en) A kind of temp.-regulating type forced circulation heat exchange of heat pipe
CN112815426B (en) Air cooler based on superconducting heat exchange performance and use method thereof
CN116044686A (en) Cooling system of wind turbine generator

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant