A calcium stearate automated production system and method

Abstract

The invention discloses an automated production system and method for calcium stearate, comprising a crusher, a crushed calcium oxide storage tank, a conveyor, a lime milk reaction tank, a calcium stearate reactor, an intermediate tank, a centrifugal pump and a control system which are sequentially arranged. The system has a high degree of automation, and the opening and closing of the feeding link and the equipment are all automatically controlled, the material quality is accurately fed, waste is reduced, labor costs are reduced, and chemical safety accidents caused by human factors are avoided.

Description

Technical Field

[0001] The invention relates to the field of calcium stearate production, and in particular to an automated calcium stearate production system and method. Background Art

[0002] Calcium stearate is a non-toxic heat stabilizer for polyvinyl chloride and an indispensable processing aid in the processing of polyvinyl chloride resin plastics.

[0003] At this stage, labor costs are rising, and chemical safety accidents are happening frequently. Enterprises need to reduce various costs, and popularizing automated production has become a trend. At the same time, automated production will also improve the quality of employees in the entire chemical industry and reduce casualties.

[0004] Therefore, how to design a calcium stearate automated production system and method has become a problem that we urgently need to solve. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an automated production system for calcium stearate, comprising a crusher, a crushed calcium oxide storage tank, a conveyor, a lime milk reaction tank, a calcium stearate reactor, an intermediate tank, a centrifugal pump and a control system, which are arranged in sequence.

[0006] A conveying device is provided between the crusher and the crushed calcium oxide storage tank.

[0007] The lime milk reaction tank is connected to a metering pump, and the metering pump is used to pump tap water into the lime milk reaction tank.

[0008] A lime milk pump is provided between the lime milk reaction tank and the calcium stearate reactor, and the lime milk pump is used to pump the lime milk in the lime milk reaction tank into the calcium stearate reactor.

[0009] A heat transfer device is provided between the lime milk reaction tank and the calcium stearate reactor, and the heat transfer device is used to transfer the heat generated in the lime milk reaction tank to the calcium stearate reactor.

[0010] The calcium stearate reactor is also connected to an ammonia pump and a stearic acid pump, and the ammonia pump and the stearic acid pump are used to pump ammonia and liquid stearic acid into the calcium stearate reactor respectively.

[0011] The bottom of the calcium stearate reactor is provided with a valve, and the intermediate tank is arranged below the bottom of the calcium stearate reactor.

[0012] The valve is provided with an electric control switch.

[0013] The switch of the crushed calcium oxide storage tank, the switch of the conveyor and the switch of the metering pump are all controlled by the sensor E1.

[0014] A height sensor E2 is provided in the intermediate tank, and the switch of the centrifugal pump is controlled by the height sensor E2.

[0015] The sensor E1, the height sensor E2 and the electric control switch are all connected to the control system signal, and the height sensor E2 is used in conjunction with the sensor E1.

[0016] Furthermore, the valve is provided with a manual switch.

[0017] Furthermore, the automated production system also includes a crawler filter press, a dryer, a silo and an automatic packaging machine which are sequentially arranged after the centrifugal pump, and the centrifugal pump pumps the product in the intermediate tank into the crawler filter press.

[0018] Furthermore, a conveying device is provided between the crawler filter press and the dryer, between the dryer and the silo, and between the silo and the automatic packaging machine.

[0019] Furthermore, the dryer is a cyclone dryer.

[0020] Furthermore, the switches of the lime milk pump, the ammonia water pump and the stearic acid pump are all connected to the control system signal.

[0021] The present invention also provides an automated production method for calcium stearate, and the specific production method steps are as follows:

[0022] S1: The qualified quicklime is crushed by a crusher and sent to a crushed calcium oxide storage tank, and then sent to a lime milk reaction tank via a conveyor. A metering pump automatically adds tap water into the lime milk reaction tank to make 10% lime milk. The switch and opening time of the crushed calcium oxide storage tank, conveyor and metering pump are all controlled by sensor E1.

[0023] S2: The large amount of heat released by the reaction of quicklime and water is transferred to the calcium stearate reactor through the heat transfer device, and the stearic acid pump is controlled by the control system to pump the stearic acid solution into the calcium stearate reactor, heated, and then ammonia water is pumped into the calcium stearate reactor through ammonia water pump, and then 10% lime milk is slowly pumped into the calcium stearate reactor while stirring, and then quickly stirred,

[0024] S3: After the reaction time is up, the control system automatically opens the valve at the bottom of the calcium stearate reactor and puts the material into the intermediate tank. The height sensor E2 is installed in the intermediate tank. After reaching the height, the height sensor E2 is linked with the sensor E1 to automatically open the crushed calcium oxide storage tank, conveyor and metering pump to continue feeding. At the same time, the height sensor E2 in the intermediate tank controls the centrifugal pump to start. The material is pumped into the crawler filter press by the centrifugal pump. The filter cake is conveyed to the cyclone dryer for drying via the crawler, and then fed into the material bin and packaged into finished products by the automatic packaging machine.

[0025] Furthermore, the time for pumping 10% lime milk into S2 is controlled at 35±5 min.

[0026] Furthermore, the reaction time in S3 is 1-1.5 hours, and then the valve automatically opens to release the material.

[0027] The beneficial effects of the present invention are: the system has a high degree of automation, the feeding process and the opening and closing of the equipment are all automatically controlled, the material quality is accurately fed, waste is reduced, labor costs are reduced, and chemical safety accidents caused by human factors are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a diagram of the automated production system of the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with specific embodiments.

[0030] Example 1

[0031] like Figure 1 As shown, an automated production system for calcium stearate includes a crusher, a crushed calcium oxide storage tank, a conveyor, a lime milk reaction tank, a calcium stearate reactor, an intermediate tank, a centrifugal pump, a crawler filter press, a dryer, a silo, an automatic packaging machine and a control system, which are arranged in sequence, and the dryer is a cyclone dryer.

[0032] There are conveying devices between the crusher and the crushed calcium oxide storage tank, between the crawler filter press and the dryer, between the dryer and the silo, and between the silo and the automatic packaging machine.

[0033] The lime milk reaction tank is connected to a metering pump, which is used to pump tap water into the lime milk reaction tank.

[0034] A lime milk pump is provided between the lime milk reaction tank and the calcium stearate reactor. The lime milk pump is used to pump the lime milk in the lime milk reaction tank into the calcium stearate reactor.

[0035] A heat transfer device is provided between the lime milk reaction tank and the calcium stearate reactor, and the heat transfer device is used to transfer the heat generated in the lime milk reaction tank to the calcium stearate reactor.

[0036] The calcium stearate reactor is also connected to an ammonia pump and a stearic acid pump, which are used to pump ammonia and liquid stearic acid into the calcium stearate reactor respectively.

[0037] A valve is provided at the bottom of the calcium stearate reactor, and an intermediate tank is provided below the bottom of the calcium stearate reactor.

[0038] The valve is equipped with an electric switch and a manual switch. If it fails to react completely within the reaction time, the valve can be forcibly closed to continue the reaction.

[0039] The switch of the crushed calcium oxide storage tank, the switch of the conveyor and the switch of the metering pump are all controlled by the sensor E1. A height sensor E2 is provided in the intermediate tank. The switch of the centrifugal pump is controlled by the height sensor E2. The sensor E1, the height sensor E2 and the electric control switch are all connected with the control system signal. The height sensor E2 is used in conjunction with the sensor E1. The switches of the lime milk pump, the ammonia water pump and the stearic acid pump are all connected with the control system signal.

[0040] The process steps for producing calcium stearate by the above automated production system are as follows:

[0041] S1: crush the qualified quicklime to about 40mm by crusher and send it to crushed calcium oxide storage tank, then convey 94kg quicklime to lime milk reaction tank by conveyor, and metering pump automatically adds 1.314 tons of tap water to lime milk reaction tank to make 10% lime milk. The switch and opening time of crushed calcium oxide storage tank, conveyor and metering pump are all controlled by sensor E1.

[0042] S2: The large amount of heat released by the reaction of quicklime and water is transferred to the calcium stearate reactor through the heat transfer device, and the stearic acid pump is controlled by the control system to pump 500kg of stearic acid solution into the calcium stearate reactor, heated, and then 10kg of 8% ammonia water is pumped into the calcium stearate reactor through ammonia water. Then, 10% of lime milk is slowly pumped into the calcium stearate reactor while stirring, controlled at 35±5min, and stirred rapidly.

[0043] S3: The reaction time is controlled at 1-1.5h. When the time is up, the control system automatically opens the valve at the bottom of the calcium stearate reactor and puts the material into the intermediate tank. The height sensor E2 is installed in the intermediate tank. After reaching the height, the height sensor E2 is linked with the sensor E1 to automatically open the crushed calcium oxide storage tank, conveyor and metering pump to continue feeding. At the same time, the height sensor E2 in the intermediate tank controls the centrifugal pump to start. The material is pumped into the crawler filter press by the centrifugal pump. The filter cake is conveyed to the cyclone dryer for drying via the crawler, and then fed into the material bin. It is then packaged into a finished product by an automatic packaging machine, and 545kg of first-level finished product is obtained.

[0044] The system has a high degree of automation. The feeding process and the opening and closing of the equipment are all automatically controlled. The material quality is accurate, which reduces waste, reduces labor costs, and avoids chemical safety accidents caused by human factors.

[0045] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A calcium stearate automated production system, characterized in that: It includes a crusher, a crushed calcium oxide storage tank, a conveyor, a lime milk reaction tank, a calcium stearate reactor, an intermediate tank, a centrifugal pump and a control system. A conveying device is provided between the crusher and the crushed calcium oxide storage tank. The lime milk reaction tank is connected to a metering pump, and the metering pump is used to pump tap water into the lime milk reaction tank. A lime milk pump is provided between the lime milk reaction tank and the calcium stearate reactor, and the lime milk pump is used to pump the lime milk in the lime milk reaction tank into the calcium stearate reactor. A heat transfer device is provided between the lime milk reaction tank and the calcium stearate reactor, and the heat transfer device is used to transfer the heat generated in the lime milk reaction tank to the calcium stearate reactor. The calcium stearate reactor is also connected to an ammonia pump and a stearic acid pump, and the ammonia pump and the stearic acid pump are used to pump ammonia and liquid stearic acid into the calcium stearate reactor respectively. The bottom of the calcium stearate reactor is provided with a valve, and the intermediate tank is arranged below the bottom of the calcium stearate reactor. The valve is provided with an electric control switch. The switch of the crushed calcium oxide storage tank, the switch of the conveyor and the switch of the metering pump are all controlled by the sensor E1. A height sensor E2 is provided in the intermediate tank, and the switch of the centrifugal pump is controlled by the height sensor E2. The sensor E1, the height sensor E2 and the electric control switch are all connected to the control system signal, and the height sensor E2 is used in conjunction with the sensor E1; The automated production system further comprises a crawler filter press, a dryer, a silo and an automatic packaging machine which are sequentially arranged after the centrifugal pump, and the centrifugal pump pumps the product of the intermediate tank into the crawler filter press; A conveying device is provided between the crawler filter press and the dryer, between the dryer and the silo, and between the silo and the automatic packaging machine; The switches of the lime milk pump, the ammonia water pump and the stearic acid pump are all connected to the control system signal.

2. A calcium stearate automated production system according to claim 1, characterized in that, The valve is provided with a manual switch.

3. A calcium stearate automated production system according to claim 1, characterized in that, The dryer is a cyclone dryer.

4. A method for the automated production of calcium stearate, using any one of the automated calcium stearate production systems of claims 1-3 for production, characterized in that: The specific production method steps are as follows: S1: The qualified quicklime is crushed by a crusher and sent to a crushed calcium oxide storage tank, and then sent to a lime milk reaction tank via a conveyor. The metering pump automatically adds tap water into the lime milk reaction tank to make 10% lime milk. The switch and opening time of the crushed calcium oxide storage tank, conveyor and metering pump are all controlled by sensor E1. S2: The large amount of heat released by the reaction of quicklime and water is transferred to the calcium stearate reactor through the heat transfer device. The control system controls the stearic acid pump to pump the stearic acid solution into the calcium stearate reactor, heats it, and then pumps ammonia water into the calcium stearate reactor through ammonia water. Then, 10% lime milk is slowly pumped into the calcium stearate reactor while stirring, and then stirred rapidly. S3: After the reaction time is up, the control system automatically opens the valve at the bottom of the calcium stearate reactor and puts the material into the intermediate tank. The height sensor E2 is installed in the intermediate tank. After reaching the height, the height sensor E2 is linked with the sensor E1 to automatically open the crushed calcium oxide storage tank, conveyor and metering pump to continue feeding. At the same time, the height sensor E2 in the intermediate tank controls the centrifugal pump to start. The material is pumped into the crawler filter press by the centrifugal pump. The filter cake is conveyed to the cyclone dryer for drying via the crawler, and then fed into the material bin and packaged into finished products by the automatic packaging machine.

5. A calcium stearate automated production method according to claim 4, characterized in that, In S2, the time for pumping in 10% lime milk is controlled at 35±5min.

6. A calcium stearate automated production method according to claim 4, characterized in that, In S3, the reaction time is 1-1.5 hours, and then the valve automatically opens to release the material.

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