Automatic temperature control device for feeding pump of white carbon black centrifugal spray drying

Abstract

The utility model discloses an automatic temperature control device for a centrifugal spray drying feed pump of white carbon black: the outlet of the concentrated slurry tank is connected to a centrifugal atomizer arranged at the top of a drying tower after being connected to the feed pump, a hot air pipe is arranged in the drying tower, the discharge port at the bottom of the drying tower is connected to a bag filter, the discharge port below the bag filter is connected to a powder storage after being connected to a rotary vibrating screen, and the air outlet pipe of the bag filter is emptied after being connected to an induced draft fan; the automatic temperature control device for the feed pump includes a feed pump motor, a frequency converter, a PID control regulator, and a temperature acquisition instrument arranged on a pipeline between the drying tower and the bag filter, the PID control regulator is respectively connected to the frequency converter and the temperature acquisition instrument with signal lines, and the frequency converter and the feed pump motor are connected with a signal line. The utility model has a simple and compact structure, low manufacturing and maintenance costs, convenient and efficient operation, qualified and reliable moisture control of white carbon black, and solves the problems of high labor intensity, low efficiency, and unstable quality of white carbon black products in the prior art of manually controlling the temperature of the spray drying feed pump.

Description

Technical Field

[0001] The utility model relates to the technical field of precipitation-process white carbon black production devices, in particular to an automatic temperature control device for a white carbon black centrifugal spray drying feed pump. Technical Background

[0002] Precipitated silica is a method for producing silica, and its main raw materials are silicate and inorganic acid. The production process of precipitated silica is: preparation of water glass and acid, precipitation reaction, aging, filter pressing, washing, pulping, spray drying, briquetting, and packaging. The existing spray drying technology generally uses manual adjustment of the feed speed to control the inlet temperature of the bag filter so that the moisture content of the silica powder is controlled within the index range, that is, the drying operation is completely controlled by the operator's naked eyes to stare at the inlet temperature of the bag filter to guide the speed regulator of the feed pump to adjust the drying amount of the silica slurry so that the inlet temperature of the bag filter is adjusted and stabilized to the set temperature. The operation of manually controlling the temperature of the spray drying feed pump will cause the moisture content of the silica product to fluctuate greatly, and the moisture content will be unqualified if you are not careful. Therefore, it is necessary to develop an automatic temperature control device for the centrifugal spray drying feed pump of silica to automatically control the temperature of the drying process in the production of silica, so that the moisture control of silica in the production process of silica is qualified and reliable. Summary of the invention

[0003] The utility model aims to provide an automatic temperature control device for a centrifugal spray drying feed pump of white carbon black, which has a simple and compact structure, low manufacturing and maintenance costs, convenient and efficient operation, and qualified and reliable moisture control of white carbon black, so as to solve the problems of high labor intensity, low efficiency and unstable quality of white carbon black products in the prior art of manually controlling the temperature of the spray drying feed pump.

[0004] To achieve the above purpose, the utility model of the automatic temperature control device of the centrifugal spray drying feed pump of white carbon black comprises a thick slurry tank 1, a feed pump 2, a centrifugal atomizer 3, a drying tower 4, a bag filter 5, a feed pump automatic temperature control device 6, a rotary vibrating screen 7, and an induced draft fan 8; the outlet of the thick slurry tank 1 is connected to the centrifugal atomizer 3 arranged at the top of the drying tower 4 after being connected to the feed pump 2, a hot air pipe is arranged below the centrifugal atomizer 3 in the drying tower 4, the discharge port at the bottom of the drying tower 4 is connected to the bag filter 5, the lower discharge port of the bag filter 5 is connected to the powder warehouse after being connected to the rotary vibrating screen 7, and the air outlet pipe of the bag filter 5 is emptied after being connected to the induced draft fan 8; the feed pump automatic temperature control device 6 comprises a feed pump motor, a frequency converter, a PID control regulator and a temperature collector, the temperature collector is arranged on the pipeline between the drying tower 4 and the bag filter 5, the PID control regulator is respectively connected to the frequency converter and the temperature collector with signal lines, and the frequency converter and the feed pump motor are connected with a signal line.

[0005] The above-mentioned automatic temperature control device 6 for the feed pump is purchased from the market and belongs to the prior art.

[0006] The working principle of the PID control regulator as the core component is as follows:

[0007] Set target value: Set a target temperature T according to the drying moisture requirements of silica products.

[0008] Measuring process variables: The inlet temperature T1 of the bag filter 5 is collected by a temperature collector.

[0009] Calculate the error: Calculate the error between the set target temperature T and the actual temperature T1 Error = T-T1.

[0010] PID algorithm processing: Calculate the control output according to the PID algorithm.

[0011] Output control signal: The calculated control signal is output to instruct the frequency converter to adjust the frequency of the feed pump motor, that is, to adjust the feed pump speed n1, thereby adjusting the drying amount accordingly, so that the inlet temperature T1 of the bag filter 5 is close to the set value T.

[0012] 6. Feedback and adjustment: The system continues to measure the process variables and calculate the new error. The PID controller recalculates the control output based on the new error, thus forming a closed-loop control loop.

[0013] The utility model of the automatic temperature control device for the feeding pump of white carbon black centrifugal spray drying has the following technical characteristics and beneficial effects:

[0014] 1. The centrifugal spray drying process of white carbon black realizes automatic and intelligent control, which makes the moisture control of white carbon black qualified and reliable, which not only improves production efficiency, reduces labor intensity, reduces production costs, but also stabilizes product quality.

[0015] 2. The whole device has a simple and compact structure, low manufacturing and maintenance costs, and convenient and efficient operation.

[0016] The utility model adopts high-performance temperature sensors, control systems, cooling systems, feed pumps and centrifugal spray dryers, and ensures the stability, response speed and adjustment ability of each component, and realizes real-time monitoring and automatic control of the drying process through the synergistic effect of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the structure of an automatic temperature control device for a centrifugal spray drying feed pump of white carbon black.

[0018] Reference numerals: concentrated slurry tank 1, feed pump 2, centrifugal atomizer 3, drying tower 4, bag filter 5, feed pump automatic temperature control device 6, rotary vibrating screen 7, induced draft fan 8. DETAILED DESCRIPTION

[0019] The specific implementation of the automatic temperature control device for the centrifugal spray drying feed pump of white carbon black of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] Figure 1 As shown, the utility model comprises a concentrated slurry tank 1, a feed pump 2, a centrifugal atomizer 3, a drying tower 4, a bag filter 5, a feed pump automatic temperature control device 6, a rotary vibrating screen 7, and an induced draft fan 8; the outlet of the concentrated slurry tank 1 is connected to the centrifugal atomizer 3 arranged at the top of the drying tower 4 after being connected to the feed pump 2, a hot air pipe is arranged below the centrifugal atomizer 3 in the drying tower 4, the discharge port at the bottom of the drying tower 4 is connected to the bag filter 5, the lower discharge port of the bag filter 5 is connected to the powder warehouse after being connected to the rotary vibrating screen 7, and the air outlet pipe of the bag filter 5 is emptied after being connected to the induced draft fan 8; the feed pump automatic temperature control device 6 comprises a feed pump motor, a frequency converter, a PID control regulator and a temperature collector, the temperature collector is arranged on the pipeline between the drying tower 4 and the bag filter 5, the PID control regulator is respectively connected to the frequency converter and the temperature collector with signal lines, and the frequency converter and the feed pump motor are connected with a signal line.

[0021] The specific operation of the automatic temperature control device for feeding pump of centrifugal spray drying of white carbon black of the utility model is as follows:

[0022] The white carbon black concentrated slurry in the concentrated slurry tank 1 is fed into the centrifugal atomizer 3 through the feed pump 2, and enters the drying tower 4 for drying after atomization. The atomized concentrated slurry meets the hot air in the drying tower 4, and the concentrated slurry is heated to evaporate the water to obtain white carbon black powder; the white carbon black powder is suspended in the hot air and is sucked into the bag filter 5 from the bottom of the drying tower 4, and the powder is separated from the water vapor and air in the bag filter 5. The water vapor and air are sucked away by the induced draft fan through the cloth bag and discharged, and the dried white carbon black powder is collected at the bottom of the bag filter 4, and then enters the rotary vibrating screen 7 to remove the large particles of white carbon black. The white carbon black powder is sent to the powder warehouse and enters the next packaging process.

[0023] The control of the moisture content of white carbon black in the production process is carried out by adjusting the rotation speed n1 of the feed pump 2 according to the inlet temperature T1 of the bag filter 5. When the temperature and gas volume of the hot air entering the tower are constant, the inlet temperature T1 of the bag filter 7 is proportional to the rotation speed n1 of the feed pump 2. Based on this principle, the utility model adopts a PID control regulator and a motor frequency converter to achieve the purpose of automatically controlling the temperature of the feed pump of the centrifugal spray drying of white carbon black.

Claims

1. An automatic temperature control device for a centrifugal spray drying feed pump of white carbon black, comprising a concentrated slurry tank (1), a feed pump (2), a centrifugal atomizer (3), a drying tower (4), a bag filter (5), a rotary vibrating screen (7), and an induced draft fan (8); the outlet of the concentrated slurry tank (1) is connected to the centrifugal atomizer (3) arranged at the top of the drying tower (4) after being connected to the feed pump (2); a hot air pipe is arranged below the centrifugal atomizer (3) in the drying tower (4); the discharge port at the bottom of the drying tower (4) is connected to the bag filter (5); the discharge port below the bag filter (5) is connected to a powder storage after being connected to the rotary vibrating screen (7); the air outlet pipe of the bag filter (5) is emptied after being connected to the induced draft fan (8); the characteristics are: It also includes a feed pump automatic temperature control device (6); the feed pump automatic temperature control device (6) includes a feed pump motor, a frequency converter, a PID control regulator and a temperature collector, the temperature collector is arranged on a pipeline between the drying tower (4) and the bag filter (5), the PID control regulator is respectively connected to the frequency converter and the temperature collector by signal lines, and the frequency converter and the feed pump motor are connected by a signal line.

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