Picked vegetable salted pehtze automatic desalter and method

[0028] Example 1

[0029] As attached figure 1 As shown, the intake pipe 3 is installed on the bottom side of the salt blank bleaching liquid container 1, and the drain pipe 4 is installed on the other side of the bottom of the salt blank bleaching liquid container 1. The inlet pipe solenoid valve 6 and the drain pipe solenoid valve 5 are respectively Installed on the intake pipe 3 and the drain pipe 4, the control cabinet 7 is composed of the LCD screen 8 and the control cabinet main board 11, the relay 9, and the relay 10. The LCD screen 8 is connected with the control cabinet main board 11 to realize the control friendly display function and control the drainage relay 9. 1. The air intake control relay 10 is respectively connected with the main board 11 of the control cabinet to realize the control of the relay by the main board. The control drainage relay 9 and the control intake relay 10 are respectively connected with the drainage pipe solenoid valve 5 and the intake pipe solenoid valve 6 to control the switching of the two solenoid valves. Said salt billet bleaching liquid container 1 adopts an open-top stainless steel container with a width of 120cm, a length of 200cm, and a height of 85cm. The inlet pipe adopts a 6cm vent pipe, and the drain pipe solenoid valve 5 and the inlet pipe solenoid valve 6 use Small and medium pressure solenoid valve. The control cabinet uses the STC12C5A60S2 single-chip microcomputer as the core, the AD conversion device uses the AD7705 high-precision AD converter, the TL431 high-precision constant current source is used as the AD reference voltage, and the TL431 constitutes a constant voltage differential circuit to reduce the nonlinearity of the sensor; TFT HD is used The color LCD screen and keyboard are used as human-machine interface equipment; the power source is city power; the relay described can be of model JQX-16F/T91.

[0030] Put the pickled vegetables to be desalted into the bleaching solution container 1. The initial salt content of the salt is 31.7%, and then add water to form a mixture. The amount of water added is 4 times the weight of the pickled vegetables to be desalted; pass into the mixture The gas is stirred.

[0031] By measuring the relationship between the salt content, conductivity and the salt content of the bleaching solution, a salt content-conductivity curve model is established. The relationship between the salt content of the bleaching solution and the conductivity is y = 0.5437x-1.0104 , Where y is the salt content of the bleaching solution, and x is the value of the salinity conductivity. At this time, the relationship between the salt content of the salt blank and the salt content of the bleaching solution is: L=a(M-yN), where: L is the salt content of the salt blank (%), a is the correction coefficient, and M is the salt blank The initial salt content, y is the salt content of the bleaching solution.

[0032] As attached figure 2 , Attached image 3 As shown, after the system is initialized, the correction value is set according to actual needs, the salt content of the salt billet is set to 10.0%, and the correction coefficient is set to 0.75. The original value of the salt content conductivity detected by the salinity conductivity sensor 2 is amplified and filtered by the signal conditioning circuit and then converted into the salt content conductivity value by the A/D conversion circuit. The salt content conductivity value is carried out in STC12C5A60S2 For the treatment, firstly, calculate the salt content of the bleaching liquid according to the above-mentioned salt content-conductivity curve model, and then calculate the salt content of the bleaching liquid according to the relationship curve between the salt content of the salt blank and the salt content of the bleaching solution. If the salt content of the salt billet reaches the standard, STC12C5A60S2 controls to open the drain solenoid valve 5 (normally closed) connected to the drain pipe 4 to start draining; at the same time, close the intake solenoid valve 6 (normally open) connected to the intake pipe. Stop the air intake; if the salt content of the salt billet does not reach the standard, start from the salt content conductivity detection, and repeat the above steps.

[0033] Attached Figure 4 It is a schematic diagram of the structure of the STC12C5A60S2 chip. The STC12C5A60S2 chip is used as the main control CPU, using the P2 port as the data port, and the other IO ports are used to control the reading and writing of external circuits and FLASH memory. The first serial port of the dual serial ports of the CPU is used to communicate with the PC and GPS signal reception, and the second serial port is used to read, write and control data with the AD conversion chip. The TTL level of the serial port is converted to a logic level through MAX232. Realize the communication with the PC.

[0034] When the drain pipe starts to drain, the measured bleaching salt content is 6.5%, and the salt billet salt content is 9.8%.

[0035] Example 2

[0036] Using the same device and method as in Example 1, the initial salt content of the salt billet is 29.7%, the water addition factor is 3, the salt content of the salt billet is set to 12.0%, and the correction coefficient is set to 0.87. When the drain pipe starts to drain When the measured bleaching salt content is 8.9%, the salt content of the salt billet is 12.03%.

[0037] Example 3

[0038] Using the same device and method as in Example 1, the initial salt content of the salt billet is: 25.8%, the water addition multiple is 3, the salt content of the salt billet is set to 9.0%, and the correction coefficient is set to 0.64. When the drain pipe starts to drain When the measured bleaching salt content is: 6.4%, the salt content of the salt blank is 9.0%.