CN116459954A - Self-adaptive coarse slime dehydration adjustment test system and method - Google Patents
Self-adaptive coarse slime dehydration adjustment test system and method Download PDFInfo
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- CN116459954A CN116459954A CN202310551429.9A CN202310551429A CN116459954A CN 116459954 A CN116459954 A CN 116459954A CN 202310551429 A CN202310551429 A CN 202310551429A CN 116459954 A CN116459954 A CN 116459954A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/02—Continuous feeding or discharging; Control arrangements therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B11/00—Feeding, charging, or discharging bowls
- B04B11/08—Skimmers or scrapers for discharging ; Regulating thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/02—Electric motor drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/10—Control of the drive; Speed regulating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
Description
技术领域technical field
本发明涉及粗煤泥脱水技术领域,具体的,涉及自适应调节粗煤泥脱水试验系统及方法。The invention relates to the technical field of coarse coal slime dehydration, in particular to an adaptive adjustment coarse coal slime dehydration test system and method.
背景技术Background technique
目前离心机试验方法为单机试验,即以单机设备为主体,单一入料,通过改变转速、入料量、更换不同筛篮(不同筛缝、条形)的形式,多次试验,手动取样化验,获取产品水分、处理量等实验数据,每次需停机调节参数,反复试验。缺少实时数据采集与自适应调节系统,不能快速调节,连续试验。At present, the test method of the centrifuge is a stand-alone test, that is, the stand-alone equipment is the main body, a single feeding, by changing the speed, feeding amount, changing the form of different sieve baskets (different sieve slots, strips), multiple tests, manual sampling and testing, to obtain experimental data such as product moisture, processing capacity, etc., each time it is necessary to stop the machine to adjust the parameters and repeat the test. Lack of real-time data acquisition and self-adaptive adjustment system, rapid adjustment and continuous testing are not possible.
目前,煤泥离心机的脱水效果、各因素对脱水效果的影响,仍停留在理论计算阶段,缺乏系统的脱水效果评价和试验,难以根据具体煤质选定适宜的离心机参数。随着粗煤泥入选量的增长,卧式刮刀卸料煤泥离心机成为众多选煤厂逐渐青睐的新一代大处理量粗煤泥脱水设备,主要用于选煤厂3-0mm粒级的粗煤泥脱水或相似物料的固液分离,采用单皮带轮驱动,通过行星摆线针轮差速器实现螺旋刮刀和筛篮的转速差。筛篮转速决定离心力大小,影响脱水效果。转速差的大小影响脱水效果和处理量,转速差大,螺旋刮刀推料快,处理量大,但物料在筛篮表面停留时间短,脱水效果差。刮刀和筛篮的转速可以通过变频电机调节,但由于差速器传动比固定,所以刮刀和筛篮的转速比固定,不能单独调节刮刀或筛篮的转速,不能根据现场实际情况实现处理量和脱水效果的完美配合。At present, the dehydration effect of the coal slime centrifuge and the influence of various factors on the dehydration effect are still in the stage of theoretical calculation. There is a lack of systematic evaluation and testing of the dehydration effect, and it is difficult to select the appropriate centrifuge parameters according to the specific coal quality. With the increase in the amount of coarse slime selected, the horizontal scraper discharge slime centrifuge has become a new generation of large-capacity coarse slime dehydration equipment favored by many coal preparation plants. It is mainly used for dehydration of coarse slime with a particle size of 3-0mm or solid-liquid separation of similar materials in coal preparation plants. It is driven by a single pulley and realizes the speed difference between the spiral scraper and the screen basket through a planetary cycloid differential. The rotation speed of the sieve basket determines the centrifugal force and affects the dehydration effect. The size of the speed difference affects the dehydration effect and processing capacity. If the speed difference is large, the spiral scraper pushes the material quickly and the processing capacity is large, but the material stays on the surface of the screen basket for a short time and the dehydration effect is poor. The speed of the scraper and the screen basket can be adjusted by the frequency conversion motor, but because the transmission ratio of the differential is fixed, the speed ratio of the scraper and the screen basket is fixed.
发明内容Contents of the invention
本发明提出自适应调节粗煤泥脱水试验系统及方法,解决了相关技术中刮刀和筛篮的转速比固定,不能单独调节刮刀或筛篮的转速,不能根据现场实际情况实现处理量和脱水效果完美配合的问题。The present invention proposes an adaptive adjustment test system and method for coarse coal slime dehydration, which solves the problem in the related art that the rotational speed ratio of the scraper and the sieve basket is fixed, the rotational speed of the scraper or the sieve basket cannot be adjusted independently, and the processing capacity and the dehydration effect cannot be perfectly coordinated according to the actual situation on site.
本发明的技术方案如下:自适应调节粗煤泥脱水试验系统,包括煤泥离心机,煤泥离心机包括筛篮、刮刀和驱动机构,筛篮和刮刀都与驱动机构连接,关键在于:所述驱动机构包括第一变频电机和第二变频电机,筛篮与第一变频电机的输出轴连接,刮刀与第二变频电机的输出轴连接,系统还包括混料桶、一端与煤泥离心机的排料口衔接且另一端与混料桶的进料口衔接的皮带秤、以及设置在皮带秤上方的在线水分监测仪,还包括变频渣浆泵和控制柜,变频渣浆泵的进口端与混料桶的出料口连通,变频渣浆泵的出口端与煤泥离心机的进料口连通,皮带秤和在线水分监测仪的信号输出端都与控制柜的输入端连接,控制柜的输出端同时与变频渣浆泵、第一变频电机和第二变频电机的受控端连接。The technical solution of the present invention is as follows: the self-adaptive adjustment coarse coal slime dehydration test system includes a coal slime centrifuge, and the coal slime centrifuge includes a sieve basket, a scraper and a driving mechanism, and the sieve basket and the scraper are connected to the driving mechanism. The key is that the drive mechanism includes a first frequency conversion motor and a second frequency conversion motor. The belt scale and the online moisture monitor installed above the belt scale also include a frequency conversion slurry pump and a control cabinet. The inlet port of the frequency conversion slurry pump is connected to the discharge port of the mixing tank, the outlet port of the frequency conversion slurry pump is connected to the feed port of the coal slime centrifuge, the signal output ports of the belt scale and the online moisture monitor are connected to the input port of the control cabinet, and the output port of the control cabinet is connected to the controlled terminals of the frequency conversion slurry pump, the first variable frequency motor and the second variable frequency motor.
所述煤泥离心机还包括机壳、入料管、筛篮带轮和刮刀带轮,筛篮转动设置在机壳内,刮刀转动设置在筛篮内侧,入料管的出口端延伸到刮刀内部,变频渣浆泵的出口端与入料管的进口端连通,筛篮远离入料管的一端同轴设置有筛篮轴,刮刀远离入料管的一端同轴设置有刮刀轴,筛篮带轮与筛篮轴同轴设置且固定连接,刮刀轴远离入料管的一端穿过筛篮轴后与刮刀带轮同轴设置且固定连接,筛篮带轮与第一变频电机的输出轴连接,刮刀带轮与第二变频电机的输出轴连接,在机壳底部开设的排料口位于筛篮外侧,在机壳底部与筛篮相对应的位置开设有排液口,煤泥离心机还包括设置在刮刀内且与刮刀轴同轴设置的分料盘,入料管的出口端朝向分料盘。The coal slime centrifuge also includes a casing, a feeding pipe, a sieve basket pulley and a scraper pulley. The sieve basket is rotatably set inside the sieve basket, and the scraper is rotatably arranged inside the sieve basket. The outlet end of the feed pipe extends to the inside of the scraper. The end of the knife shaft away from the feeding pipe passes through the sieve basket shaft and is coaxially arranged and fixedly connected with the scraper pulley. The sieve basket pulley is connected with the output shaft of the first frequency conversion motor, and the scraper pulley is connected with the output shaft of the second frequency conversion motor.
所述筛篮的直径由靠近入料管的一端向另一端线性减小,刮刀包括开口朝向入料管的锥体、以及盘绕设置在锥体外壁上的螺旋叶片,锥体的形状与筛篮的形状相匹配。The diameter of the sieve basket decreases linearly from one end close to the feed pipe to the other end. The scraper includes a cone with an opening facing the feed pipe and a spiral blade coiled on the outer wall of the cone. The shape of the cone matches the shape of the sieve basket.
所述分料盘的直径由靠近入料管的一端向另一端线性增大。The diameter of the distribution pan increases linearly from one end close to the feed pipe to the other end.
所述混料桶下端的直径由上向下线性减小。The diameter of the lower end of the mixing barrel decreases linearly from top to bottom.
在变频渣浆泵的进口端与混料桶的出料口之间连接有第一调节阀,在变频渣浆泵的出口端与煤泥离心机的进料口之间连接有第二调节阀。A first regulating valve is connected between the inlet end of the frequency conversion slurry pump and the discharge port of the mixing tank, and a second regulating valve is connected between the outlet end of the frequency conversion slurry pump and the feed port of the coal slime centrifuge.
所述系统还包括与混料桶的出料口连通的排料管,排料管上设置有排料阀。The system also includes a discharge pipe communicated with the discharge port of the mixing tank, and a discharge valve is arranged on the discharge pipe.
所述刮刀与筛篮之间的间隙为5-15mm。The gap between the scraper and the screen basket is 5-15mm.
自适应调节粗煤泥脱水试验系统的试验方法,关键在于:所述方法包括以下步骤:The test method of self-adaptive adjustment coarse coal slime dehydration test system, the key lies in: described method comprises the following steps:
A、在线水分监测仪将检测到的数据发送给控制柜;A. The online moisture monitor sends the detected data to the control cabinet;
B、控制柜将收到的实时水分数据与设定水分数据进行对比,当实时水分数据大于设定水分数据时,控制柜发出指令,通过第一变频电机提高筛篮转速,减小筛篮与刮刀的转速差;当实时水分数据小于设定水分数据时,控制柜发出指令,通过第一变频电机降低筛篮转速,增大筛篮与刮刀的转速差。B. The control cabinet compares the received real-time moisture data with the set moisture data. When the real-time moisture data is greater than the set moisture data, the control cabinet sends an instruction to increase the speed of the sieve basket through the first frequency conversion motor to reduce the speed difference between the sieve basket and the scraper. When the real-time moisture data is less than the set moisture data, the control cabinet sends an instruction to reduce the speed of the sieve basket through the first frequency conversion motor and increase the speed difference between the sieve basket and the scraper.
步骤A还包括以下步骤:皮带秤将检测到的数据发送给控制柜;Step A also includes the following steps: the belt scale sends the detected data to the control cabinet;
步骤B还包括以下步骤:控制柜将收到的实时排料量数据与设定排料量数据进行对比,当实时排料量数据小于设定排料量数据时,控制柜发出指令,提高变频渣浆泵转速,增加入料量;当实时排料量数据大于设定排料量数据时,控制柜发出指令,降低变频渣浆泵转速,减少入料量。Step B also includes the following steps: the control cabinet compares the received real-time discharge volume data with the set discharge volume data, and when the real-time discharge volume data is less than the set discharge volume data, the control cabinet sends an instruction to increase the speed of the frequency conversion slurry pump to increase the feed volume; when the real-time discharge volume data is greater than the set discharge volume data, the control cabinet sends an instruction to reduce the speed of the frequency conversion slurry pump and reduce the feed volume.
本发明的工作原理及有益效果为:设置混料桶,在煤泥离心机的排料口与混料桶的进料口之间设置皮带秤,在皮带秤上方设置在线水分监测仪,在混料桶的出料口与煤泥离心机的进料口之间设置变频渣浆泵,皮带秤和在线水分监测仪的信号输出端都与控制柜的输入端连接,控制柜的输出端同时与变频渣浆泵、第一变频电机和第二变频电机的受控端连接。筛篮与第一变频电机的输出轴连接,刮刀与第二变频电机的输出轴连接,筛篮与刮刀通过两台变频电机分别驱动,二者相对自由转动,无固定转速差或转速比,在线水分监测仪采用远红外、微波等形式对煤泥离心机排出到皮带秤上的产品进行实时水分监测,皮带秤对排料进行实时称重,计算实时处理量,实时处理量和实时水分两个信号都可以传输至控制柜,并实时显示在控制柜的可视化窗口中,利用控制柜可以调节设定水分数据和设定排料量(合理范围内选择数值,两数值相互关联)大小,控制柜对采集到的实时信号与设定值进行对比分析,根据实时水分数据的大小调节筛篮转速,从而改变筛篮与刮刀的转速差,根据实时排料量的大小调节变频渣浆泵转速。本发明可实时调节筛篮转速、筛篮与刮刀转速差,不单独设置刮刀转速,而设置成筛篮与刮刀转速差的原因是能精准控制(计算)排料量(处理能力),能根据现场实际情况实现处理量和脱水效果的完美配合。变频渣浆泵用于给物料加压,从混料桶向煤泥离心机泵送物料,变频渣浆泵由控制柜控制,通过调节转速可以控制煤泥离心机的入料量。The working principle and beneficial effects of the present invention are as follows: a mixing tank is installed, a belt scale is installed between the discharge port of the slime centrifuge and the feed port of the mixing tank, an online moisture monitor is installed above the belt scale, a variable frequency slurry pump is installed between the discharge port of the mixing tank and the feed port of the coal slime centrifuge, the signal output terminals of the belt scale and the online moisture monitor are connected to the input terminal of the control cabinet, and the output terminal of the control cabinet is simultaneously connected to the controlled terminals of the variable frequency slurry pump, the first variable frequency motor and the second variable frequency motor. The screen basket is connected to the output shaft of the first frequency conversion motor, and the scraper is connected to the output shaft of the second frequency conversion motor. The screen basket and the scraper are respectively driven by two frequency conversion motors. The two are relatively free to rotate without fixed speed difference or speed ratio. The online moisture monitor uses far-infrared, microwave and other forms to monitor the real-time moisture content of the products discharged from the slime centrifuge to the belt scale. The control cabinet can be used to adjust the set moisture data and the set discharge volume (select the value within a reasonable range, and the two values are related to each other). The control cabinet compares and analyzes the collected real-time signal and the set value, adjusts the speed of the screen basket according to the real-time moisture data, thereby changing the speed difference between the screen basket and the scraper, and adjusts the speed of the frequency conversion slurry pump according to the size of the real-time discharge volume. The invention can adjust the rotation speed of the sieve basket and the difference between the rotation speed of the sieve basket and the scraper in real time. The reason why the rotation speed of the sieve basket and the scraper is not set separately, but the difference between the rotation speed of the sieve basket and the scraper is that it can precisely control (calculate) the discharge amount (processing capacity), and realize the perfect cooperation between the processing amount and the dehydration effect according to the actual situation on site. The frequency conversion slurry pump is used to pressurize the material and pump the material from the mixing tank to the slime centrifuge. The frequency conversion slurry pump is controlled by the control cabinet, and the feeding amount of the coal slime centrifuge can be controlled by adjusting the speed.
附图说明Description of drawings
下面结合附图和具体实施方式对本发明作进一步详细的说明。The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
图1为本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
图2为本发明中煤泥离心机的结构示意图。Fig. 2 is the structural representation of the coal slime centrifuge in the present invention.
图3为本发明的原理框图。Fig. 3 is a functional block diagram of the present invention.
图中:1、混料桶,2、变频渣浆泵,3、煤泥离心机,3-1、筛篮,3-2、刮刀,3-3、筛篮轴,3-4、机壳,3-5、入料管,3-6、筛篮带轮,3-7、刮刀带轮,3-8、分料盘,3-9、刮刀轴,4、在线水分监测仪,5、皮带秤,6、控制柜,7、第一变频电机,8、第二变频电机,9、排料管,10、排料阀,11、第一调节阀,12、第二调节阀。In the figure: 1, mixing tank, 2, frequency conversion slurry pump, 3, coal slime centrifuge, 3-1, screen basket, 3-2, scraper, 3-3, screen basket shaft, 3-4, casing, 3-5, feeding pipe, 3-6, screen basket pulley, 3-7, scraper pulley, 3-8, distribution tray, 3-9, scraper shaft, 4, online moisture monitor, 5, belt scale, 6, control cabinet, 7, first frequency conversion motor, 8, second Frequency conversion motor, 9, discharge pipe, 10, discharge valve, 11, first regulating valve, 12, second regulating valve.
具体实施方式Detailed ways
下面将结合本发明实施例,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都涉及本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all involve the protection scope of the present invention.
具体实施例,如图1、图2和图3所示,自适应调节粗煤泥脱水试验系统,包括煤泥离心机3,煤泥离心机3包括筛篮3-1、刮刀3-2和驱动机构,筛篮3-1和刮刀3-2都与驱动机构连接,驱动机构包括第一变频电机7和第二变频电机8,筛篮3-1与第一变频电机7的输出轴连接,刮刀3-2与第二变频电机8的输出轴连接,系统还包括混料桶1、一端与煤泥离心机3的排料口衔接且另一端与混料桶1的进料口衔接的皮带秤5、以及设置在皮带秤5上方的在线水分监测仪4,还包括变频渣浆泵2和控制柜6,变频渣浆泵2的进口端与混料桶1的出料口连通,变频渣浆泵2的出口端与煤泥离心机3的进料口连通,皮带秤5和在线水分监测仪4的信号输出端都与控制柜6的输入端连接,控制柜6的输出端同时与变频渣浆泵2、第一变频电机7和第二变频电机8的受控端连接。Specific embodiment, as shown in Fig. 1, Fig. 2 and Fig. 3, self-adaptive adjustment coarse coal slime dehydration test system, comprises coal slime centrifuge 3, and coal slime centrifuge 3 comprises sieve basket 3-1, scraper 3-2 and driving mechanism, and sieve basket 3-1 and scraper 3-2 are all connected with drive mechanism, and drive mechanism comprises first frequency conversion motor 7 and second frequency conversion motor 8, and sieve basket 3-1 is connected with the output shaft of first frequency conversion motor 7, and scraper 3-2 is connected with the output shaft of second frequency conversion motor 8, and the system also includes mixing bucket 1. A belt scale 5 connected at one end to the discharge port of the coal slime centrifuge 3 and at the other end to the feed port of the mixing tank 1, and an online moisture monitor 4 arranged above the belt scale 5, and also includes a frequency conversion slurry pump 2 and a control cabinet 6. The inlet port of the frequency conversion slurry pump 2 is connected to the discharge port of the mixing tank 1, and the outlet port of the frequency conversion slurry pump 2 is connected to the feed port of the coal slime centrifuge 3. The signal output ports of the belt scale 5 and the online moisture monitor 4 are both connected to the input of the control cabinet 6 The output terminal of the control cabinet 6 is connected with the controlled terminals of the frequency conversion slurry pump 2, the first frequency conversion motor 7 and the second frequency conversion motor 8 at the same time.
作为对本发明的进一步改进,所述煤泥离心机3还包括机壳3-4、入料管3-5、筛篮带轮3-6和刮刀带轮3-7,筛篮3-1转动设置在机壳3-4内,刮刀3-2转动设置在筛篮3-1内侧,入料管3-5的出口端延伸到刮刀3-2内部,变频渣浆泵2的出口端与入料管3-5的进口端连通,筛篮3-1远离入料管3-5的一端同轴设置有筛篮轴3-3,刮刀3-2远离入料管3-5的一端同轴设置有刮刀轴3-9,筛篮带轮3-6与筛篮轴3-3同轴设置且固定连接,刮刀轴3-9远离入料管3-5的一端穿过筛篮轴3-3后与刮刀带轮3-7同轴设置且固定连接,筛篮带轮3-6与第一变频电机7的输出轴连接,刮刀带轮3-7与第二变频电机8的输出轴连接,在机壳3-4底部开设的排料口位于筛篮3-1外侧,在机壳3-4底部与筛篮3-1相对应的位置开设有排液口,煤泥离心机3还包括设置在刮刀3-2内且与刮刀轴3-9同轴设置的分料盘3-8,入料管3-5的出口端朝向分料盘3-8。As a further improvement to the present invention, the coal slime centrifuge 3 also includes a casing 3-4, a feed pipe 3-5, a sieve basket pulley 3-6 and a scraper pulley 3-7, the sieve basket 3-1 is rotatably arranged in the casing 3-4, the scraper 3-2 is rotatably arranged inside the sieve basket 3-1, the outlet end of the feed pipe 3-5 extends to the inside of the scraper 3-2, the outlet end of the frequency conversion slurry pump 2 communicates with the inlet end of the feed pipe 3-5, and the sieve basket 3-1 is away from the feed One end of the pipe 3-5 is coaxially provided with a sieve basket shaft 3-3, and the end of the scraper 3-2 away from the feed pipe 3-5 is coaxially provided with a scraper shaft 3-9. The knife belt pulley 3-7 is connected with the output shaft of the second variable frequency motor 8, the discharge port provided at the bottom of the casing 3-4 is located outside the screen basket 3-1, and a liquid discharge port is provided at the bottom of the casing 3-4 at a position corresponding to the screen basket 3-1. The coal slime centrifuge 3 also includes a distribution tray 3-8 arranged in the scraper 3-2 and coaxially arranged with the scraper shaft 3-9, and the outlet end of the feed pipe 3-5 faces the distribution tray 3-8.
如图2所示,筛篮带轮3-6安装在筛篮轴3-3右端,筛篮轴3-3左端安装筛篮3-1,筛篮轴3-3为空心轴;刮刀轴3-9通过轴承布置在筛篮轴3-3内部,长度比筛篮轴3-3长,可相对自由转动,刮刀轴3-9的右端装有刮刀带轮3-7,左端安装刮刀3-2;刮刀3-2位于筛篮3-1内部,刮刀3-2的锥体上设置有出料孔,用于物料从刮刀3-2内部排出向筛篮3-1运动。第一变频电机7通过筛篮带轮3-6、筛篮轴3-3带动筛篮3-1旋转,第二变频电机8通过刮刀带轮3-7、刮刀轴3-9带动刮刀3-2同步旋转,利用第一变频电机7可以调节筛篮3-1的转速,利用第二变频电机8可以调节刮刀3-2的转速,使得刮刀3-2和筛篮3-1保持有转速差,入料管3-5上端垂直,用于接收物料,入料管3-5下端倾斜,使得物料能够快速地从入料管3-5进入刮刀3-2内部。物料经过随刮刀3-2一起高速旋转的分料盘3-8施以初速度,从刮刀3-2的出料孔流出,均匀地分配到刮刀3-2和筛篮3-1之间的空间内。在离心力的作用下,水和细小的颗粒透过筛篮3-1的筛缝,经排液口排出;脱水后的物料附着于筛篮3-1内壁,在刮刀3-2和筛篮3-1之间的转速差、筛篮3-1倾角与刮刀3-2的推力等作用下,物料向煤泥离心机3的排料口移动,落入排料口排出机外,这一脱水过程连续不断进行。As shown in Figure 2, the sieve basket pulley 3-6 is mounted on the right end of the sieve basket shaft 3-3, the sieve basket shaft 3-3 is installed at the left end of the sieve basket 3-1, and the sieve basket shaft 3-3 is a hollow shaft; the scraper shaft 3-9 is arranged inside the sieve basket shaft 3-3 through bearings, the length is longer than the sieve basket shaft 3-3, and can rotate relatively freely. The right end of the scraper shaft 3-9 is equipped with a scraper pulley 3-7, and the left end is equipped with a scraper 3-2; The cone of the scraper 3-2 is provided with a discharge hole for the material to be discharged from the scraper 3-2 to the screen basket 3-1. The first frequency conversion motor 7 drives the screen basket 3-1 to rotate through the screen basket pulley 3-6 and the screen basket shaft 3-3. The second frequency conversion motor 8 drives the scraper 3-2 to rotate synchronously through the scraper pulley 3-7 and the scraper shaft 3-9. The first frequency conversion motor 7 can be used to adjust the speed of the screen basket 3-1, and the second frequency conversion motor 8 can be used to adjust the speed of the scraper 3-2, so that there is a speed difference between the scraper 3-2 and the screen basket 3-1. The lower end of the pipe 3-5 is inclined so that the material can quickly enter the inside of the scraper 3-2 from the feeding pipe 3-5. The material passes through the distributing plate 3-8 which rotates at high speed with the scraper 3-2 to give an initial velocity, flows out from the discharge hole of the scraper 3-2, and is evenly distributed into the space between the scraper 3-2 and the screen basket 3-1. Under the action of centrifugal force, water and tiny particles pass through the sieve of the sieve basket 3-1 and are discharged through the discharge port; the dehydrated material adheres to the inner wall of the sieve basket 3-1, and under the action of the speed difference between the scraper 3-2 and the sieve basket 3-1, the inclination angle of the sieve basket 3-1 and the thrust of the scraper 3-2, the material moves to the discharge port of the coal slime centrifuge 3, falls into the discharge port and is discharged out of the machine. This dehydration process continues continuously.
作为对本发明的进一步改进,筛篮3-1的直径由靠近入料管3-5的一端向另一端线性减小,刮刀3-2包括开口朝向入料管3-5的锥体、以及盘绕设置在锥体外壁上的螺旋叶片,锥体的形状与筛篮3-1的形状相匹配。如图2所示,入料管3-5位于筛篮3-1左侧,筛篮3-1的直径由左向右线性减小,锥体的开口朝向左侧,锥体的直径也是由左向右线性减小,这样更有利于物料向左侧滑落,然后由排料口排出。As a further improvement to the present invention, the diameter of the sieve basket 3-1 is linearly reduced from one end close to the feed pipe 3-5 to the other end, the scraper 3-2 includes a cone with an opening facing the feed pipe 3-5, and a spiral blade coiled on the outer wall of the cone, the shape of the cone matches the shape of the sieve basket 3-1. As shown in Figure 2, the feeding pipe 3-5 is located on the left side of the sieve basket 3-1, the diameter of the sieve basket 3-1 decreases linearly from left to right, the opening of the cone faces to the left, and the diameter of the cone also decreases linearly from left to right, which is more conducive to the material sliding to the left and then discharged from the discharge port.
作为对本发明的进一步改进,分料盘3-8的直径由靠近入料管3-5的一端向另一端线性增大。如图2所示。这样可以使得物料与分料盘3-8有足够大的接触面积,而且更有利于物料向外围扩散,然后通过刮刀3-2的锥体上的出料孔进入到筛篮3-1内。As a further improvement to the present invention, the diameter of the distribution tray 3-8 linearly increases from one end close to the feed pipe 3-5 to the other end. as shown in picture 2. This can make the material have a large enough contact area with the distribution tray 3-8, and is more conducive to the diffusion of the material to the periphery, and then enters the screen basket 3-1 through the discharge hole on the cone of the scraper 3-2.
作为对本发明的进一步改进,混料桶1下端的直径由上向下线性减小。如图1所示,这样可以使得混料桶1内的物料都能能够排出,避免混料桶1内有物料残留。As a further improvement to the present invention, the diameter of the lower end of the mixing tank 1 decreases linearly from top to bottom. As shown in FIG. 1 , in this way, the materials in the mixing tank 1 can be discharged to avoid material residue in the mixing tank 1 .
作为对本发明的进一步改进,在变频渣浆泵2的进口端与混料桶1的出料口之间连接有第一调节阀11,在变频渣浆泵2的出口端与煤泥离心机3的进料口之间连接有第二调节阀12。如图1所示,利用第一调节阀12可以调节物料进入变频渣浆泵2的流量大小,利用第二调节阀12可以调节物料返回到煤泥离心机3的流量大小,更好地满足脱水需求。第一调节阀11和第二调节阀12的受控端都与控制柜6连接,利用控制柜6的参数设置实现第一调节阀11和第二调节阀12流量的调节,省去了人工手动调节的过程,而且调节精度更高。As a further improvement to the present invention, a first regulating valve 11 is connected between the inlet end of the frequency conversion slurry pump 2 and the discharge port of the mixing tank 1, and a second regulating valve 12 is connected between the outlet end of the frequency conversion slurry pump 2 and the feed port of the coal slime centrifuge 3. As shown in Fig. 1, the flow rate of the material entering the frequency conversion slurry pump 2 can be adjusted by using the first regulating valve 12, and the flow rate of the material returning to the slime centrifuge 3 can be adjusted by using the second regulating valve 12, so as to better meet the dehydration requirement. Both the controlled ends of the first regulating valve 11 and the second regulating valve 12 are connected to the control cabinet 6, and the flow adjustment of the first regulating valve 11 and the second regulating valve 12 is realized by using the parameter setting of the control cabinet 6, which saves the process of manual adjustment, and the adjustment accuracy is higher.
作为对本发明的进一步改进,系统还包括与混料桶1的出料口连通的排料管9,排料管9上设置有排料阀10。如图1所示,利用排料阀10可以调节混料桶1排料时的流量大小,更好地满足排料需求。排料阀10的受控端与控制柜6连接,利用控制柜6的参数设置实现排料阀10流量的调节,省去了人工手动调节的过程,而且调节精度更高。As a further improvement to the present invention, the system further includes a discharge pipe 9 communicated with the discharge port of the mixing tank 1 , and a discharge valve 10 is arranged on the discharge pipe 9 . As shown in FIG. 1 , the discharge valve 10 can be used to adjust the flow rate of the mixing tank 1 when discharging, so as to better meet the discharge requirements. The controlled end of the discharge valve 10 is connected to the control cabinet 6, and the flow adjustment of the discharge valve 10 is realized by using the parameter setting of the control cabinet 6, which saves the process of manual adjustment, and the adjustment accuracy is higher.
作为对本发明的进一步改进,刮刀3-2与筛篮3-1之间的间隙为5-15mm,既使得脱水后的物料能够被顺利刮下来,又避免刮刀3-2直接与筛篮3-1接触而对其产生磨损。As a further improvement to the present invention, the gap between the scraper 3-2 and the screen basket 3-1 is 5-15mm, which not only enables the dehydrated material to be scraped off smoothly, but also prevents the scraper 3-2 from directly contacting the screen basket 3-1 and causing abrasion to it.
实施例1、自适应调节粗煤泥脱水试验系统的试验方法,包括以下步骤:Embodiment 1, the test method of self-adaptive adjustment coarse coal slime dehydration test system, comprises the following steps:
A、在线水分监测仪4将检测到的数据发送给控制柜6;A, the online moisture monitor 4 sends the detected data to the control cabinet 6;
B、控制柜6将收到的实时水分数据与设定水分数据进行对比,刮刀3-2的转速始终大于筛篮3-1的转速,当实时水分数据大于设定水分数据时,控制柜6发出指令,通过第一变频电机7提高筛篮3-1转速,减小筛篮3-1与刮刀3-2的转速差,以增大离心力,增加物料在筛篮3-1停留时间,延长脱水时间,达到降低产品水分的目的;当实时水分数据小于设定水分数据时,控制柜6发出指令,通过第一变频电机7降低筛篮3-1转速,增大筛篮3-1与刮刀3-2的转速差,以节能降耗,加快排料。B. The control cabinet 6 compares the received real-time moisture data with the set moisture data. The speed of the scraper 3-2 is always greater than the speed of the sieve basket 3-1. When the real-time moisture data is greater than the set moisture data, the control cabinet 6 sends an instruction to increase the speed of the sieve basket 3-1 through the first variable frequency motor 7, reduce the speed difference between the sieve basket 3-1 and the scraper 3-2, increase the centrifugal force, increase the residence time of the material in the sieve basket 3-1, prolong the dehydration time, and achieve the purpose of reducing the moisture content of the product; An instruction is issued to reduce the speed of the screen basket 3-1 through the first frequency conversion motor 7, and increase the speed difference between the screen basket 3-1 and the scraper 3-2, so as to save energy and reduce consumption, and accelerate material discharge.
实施例2、自适应调节粗煤泥脱水试验系统的试验方法,包括以下步骤:Embodiment 2, the test method of self-adaptive adjustment coarse coal slime dehydration test system, comprises the following steps:
A、在线水分监测仪4将检测到的数据发送给控制柜6,皮带秤5将检测到的数据发送给控制柜6;A, the online moisture monitor 4 sends the detected data to the control cabinet 6, and the belt scale 5 sends the detected data to the control cabinet 6;
B、控制柜6将收到的实时水分数据与设定水分数据进行对比,同时,控制柜6将收到的实时排料量数据与设定排料量数据进行对比,刮刀3-2的转速始终大于筛篮3-1的转速,当实时排料量数据小于设定排料量数据时,控制柜6发出指令,提高变频渣浆泵2转速,增加入料量,入料量的增加可能造成产品水分升高,当实时水分数据大于设定水分数据时,控制柜6发出指令,通过第一变频电机7提高筛篮3-1转速,减小筛篮3-1与刮刀3-2的转速差,以增大离心力,增加物料在筛篮3-1停留时间,延长脱水时间,达到降低产品水分的目的;当实时排料量数据大于设定排料量数据时,控制柜6发出指令,降低变频渣浆泵2转速,减少入料量,入料量的减少可能造成产品水分降低,当实时水分数据小于设定水分数据时,控制柜6发出指令,通过第一变频电机7降低筛篮3-1转速,增大筛篮3-1与刮刀3-2的转速差,以节能降耗,加快排料。B. The control cabinet 6 compares the received real-time moisture data with the set moisture data. At the same time, the control cabinet 6 compares the received real-time discharge volume data with the set discharge volume data. The speed of the scraper 3-2 is always greater than the speed of the screen basket 3-1. When the real-time discharge volume data is less than the set discharge volume data, the control cabinet 6 issues instructions to increase the speed of the frequency conversion slurry pump 2 and increase the feed volume. The increase in the feed volume may cause the product moisture to rise. The motor 7 increases the rotation speed of the screen basket 3-1, reduces the speed difference between the screen basket 3-1 and the scraper 3-2, so as to increase the centrifugal force, increase the residence time of the material in the screen basket 3-1, prolong the dehydration time, and achieve the purpose of reducing product moisture; The rotating speed of the basket 3-1 increases the rotating speed difference between the screen basket 3-1 and the scraper 3-2, so as to save energy and reduce consumption, and accelerate material discharge.
本发明具有实施例1和实施例2两种试验方法,利用控制柜可以选择两种试验方法中的任意一种,选定后,试验系统连续运行,实时自适应调节筛篮转速,从而改变筛篮与刮刀的转速差,直至实时水分数据等于设定水分数据(或者是实时水分数据等于设定水分数据且实时排料量数据等于设定排料量数据),则达到相对稳定状态,这一稳定状态下的离心机运行参数即为该物料的最佳脱水参数,为离心机参数化定制、现场应用参数选取提供试验数据,且本发明的自适应调节粗煤泥脱水试验方法及智能系统可应用到智能洗煤厂,提高粗煤泥脱水的精准性和整体洗煤厂的智能化程度,能根据现场实际情况实现处理量和脱水效果的完美配合。The present invention has two test methods of embodiment 1 and embodiment 2. The control cabinet can be used to select any one of the two test methods. After selection, the test system runs continuously and adjusts the speed of the sieve basket adaptively in real time, thereby changing the speed difference between the sieve basket and the scraper until the real-time moisture data is equal to the set moisture data (or the real-time moisture data is equal to the set moisture data and the real-time discharge volume data is equal to the set discharge volume data), then a relatively stable state is reached. The operating parameters of the centrifuge in this stable state are the best dehydration parameters for the material, providing for centrifuge parameter customization and field application parameter selection. The test data, and the self-adaptive adjustment coarse coal slime dehydration test method and intelligent system of the present invention can be applied to intelligent coal washing plants to improve the accuracy of coarse coal slime dehydration and the intelligence of the overall coal washing plant, and can realize the perfect combination of processing capacity and dehydration effect according to the actual situation on site.
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