New automatic dosing device

Type and characteristics of automatic dosing device

Fully automatic dosing equipment in the electric power, petroleum, chemical industry, metallurgical industry, environmental engineering, water treatment and other fields often need to continuously inject a certain liquid into another liquid into a mixture, or to add the medicine Chemical reactions occur in certain components present in the liquid to achieve the desired process requirements. In order to achieve the best results, under the condition of changing working conditions, the chemical dosage is automatically tracked to adjust and control the dosing speed. Therefore, in the automatic dosing device, we use advanced automatic control methods to control the dosing amount.

Automatic dosing equipment This dosing device is simple in structure and easy to install. The automatic dosing equipment is mainly composed of an automatic dosing device composed of a metering box (a drug tank), a dosing metering pump (dosing pump), an automatic control system, and a connecting line. Automatic dosing device In addition to some dosing lines, sampling lines and dosing concentration detection instruments, these water treatment devices are generally centrally installed in a dosing room. The dosing tank, metering pump, and automatic control are automatically added to the dosing device. System integration, that is installed on a base. The manufacturer completes equipment purchase, manufacture, assembly, commissioning, and commissioning. The user only needs to place the combined automatic dosing device in the dosing room, and then import and export dosing pump outlets and dosing lines and metering boxes. Water pipes and other connections are good, and the control cabinet power supply and detection instrument signals can be sent to the control cabinet to start and put into operation. In this way, the on-site construction workload can be greatly reduced, errors caused by the numerous intermediate links and mutual wrangling can be avoided, the construction period and project quality can be effectively ensured, and user's troubles and losses can be reduced.

Automatic dosing device type and structure

The automatic dosing device is mainly composed of double pump single control combination, three pump dual control combination type, combined furnace water R value automatic control device and the like. Each type of structure is somewhat different.

1. Double-pump single control combined automatic dosing device The device consists of a metering box, two dosing metering pumps (standby for each other), an AC frequency conversion type automatic dosing control system, connection pipelines, valves, bases, etc. Make up, see Figure 1. The volume of the metering box is 1M` (if the user has special requirements separately), whether it is equipped with agitator, remote level gauge, liquid level high and low limits alarm and tank material selection are proposed by the user or the design department, and can also be directly addressed to me by the user. Unit consultation. The tank body is made of steel, stainless steel, and rubber tanks for different liquids. When ordering, the user must specify the following parameters of the metering pump: flow rate (1/H), pump outlet pressure (MPa), pump flow path material (or the name and concentration of the delivery agent).

2. Three-pump dual-control combined automatic dosing device

The automatic dosing device is composed of two measuring boxes, three dosing metering pumps, three sets of AC frequency conversion automatic dosing control systems, connecting pipes, valves, and bases.

Automatic dosing device three dosing metering pumps, pump 3 pump l, pump 2 spare pump, under normal circumstances, the pump 1, pump 2 in two sets of AC variable frequency automatic dosing control system driven work, so that The dosing metering pump can be operated in four ways. The toggle switch on the control cabinet can put the standby pump into operation.

The user's requirements for providing parameters for the metering tank, dosing metering pump, etc. may refer to the above description of the dual pump single-control combined automatic dosing device.

3. Combined furnace water R value automatic dosing device

The automatic dosing device is an automatic dosing device for the coordinated phosphate treatment of boiler water. The automatic dosing device consists of three metering boxes, three metering pumps, an AC variable-frequency R-value automatic control system, connecting pipes, valves and a base.

Features of automatic dosing device

1, the characteristics of automatic dosing device

The frequency conversion type automatic dosing control device adopts the advanced high-tech product--AC frequency converter to form the advanced AC speed control system, and realizes the best automatic control of dosing volume. The greatest advantages of this system are reliable performance, long service life and good start-up characteristics. ,Low energy consumption. The device can also be used as a water pump, oil pump, fan and other AC motor speed control system to achieve the pressure, flow control of the liquid and vapor in the infusion pipeline.

2, automatic dosing device structure

The automatic control device is mainly composed of an automatic control cabinet, a recorder, an AC motor, a dosing pump and the like. There are inverters, regulators, detectors, etc. in the automatic control cabinet. See the table below. The choice of the detector is determined by the user's dosing type, for example: adding ammonia, using the conductivity meter or PH meter as the detector, using the fast phosphate analyzer with phosphate, and using the pH meter in the neutralization pool to coordinate the phosphate For the treatment, the R-meter should be used, while the coagulation is based on the flow current meter. If chlorine is added, the residual chlorine table is required.

3, the principle of automatic dosing device

The dosing pump motor is driven by the AC inverter and injects the medicament into the liquid. The concentration of the medicament is detected by the detector. The detector inputs the electrical signal proportional to the concentration to the regulator and compares the set value to get the deviation signal. The deviation signal is proportionally and integrally calculated according to the process requirements. The operation result signal is sent to the inverter. The inverter changes the frequency of the motor power supply according to the adjustment signal output by the regulator, so that the motor rotation speed changes, and the injected liquid medicine is changed. The concentration allows the concentration of the agent to be controlled within the optimal range.