PAM Chemical Dosing System Industrial Wastewater Treatment Device PLC Control
Chemical dosing system is widely applied in corrosion, scale inhibition, sterilization and algae removal of the circuiting water systems such as air-conditioning cooling water, chilled water, ice storage, etc.The chemical dosing system can also achieve the effect equivalent to the electronic descaling instrument.In the process of air conditioning circulating water and various purified water, the water quality always decides if the system can run efficiently for a long time.
The pipeline corrosion, scaling, microbial propagation and other common problems of circulating water always disturber the owners. Since the foundation, Peide Water Treatment Equipment Co., Ltd. has made remarkable achievements in chemical water treatment, has becoming the most competitive enterprise with tens of national discovery patents.
II. Technological Process of Chlorine dosing system
III. Classification of chemical agent of Chlorine dosing system
3.1 Corrosion Inhibitors for Cooling Water Chemical Treatment has a comprehensive portfolio of organic, inorganic, and non-phosphate corrosion inhibitors engineered to passivate metals by reducing the corrosion potential associated with the anode and cathode of the corrosion cell. Chemicals that form protective films at the anode include chromate, orthophosphate, nitrite, silicate, and molybdate. Chemicals that form films on the cathode include calcium carbonate, polyphosphate, zinc, phosphonate, and azoles. We have a selection of organics that are both anodic and cathodic inhibitors.
3.2 Scale/Deposition Control ChemTreat’s chemical product lines to control deposition and fouling consist of two major classes of dispersants. Polymers prevent, or reverse, the growth of mineral deposits, while surfactants, or surface-active agents, render particles less adherent and more easily dispersed.
3.3 Biological Control Our biological control programs are customized by your field engineer to produce the best organism kill-rate with chemicals from our complete portfolio of biocides, including oxidizing and non-oxidizing biocides, cell wall and cytoplasm toxicants, and enzyme poisons.
III. Monitoring and control of Chlorine dosing system in circulating cooling water
4.1 Interconnected control of PH value on-line detection and acid adding
4.2 Interconnected control of conductivity on-line detection and discharge capacity
4.3 Interconnected control of ORP on-line detection and oxidative fungicide
4.4 Interconnected control of concentration on-line detection and dosing quantity of scaling-corrosion inhibitor
Technological process of Chlorine dosing system
The drug of Chlorine dosing system
3.1 Corrosion Inhibitor for Closed Chilled Water The corrosion inhibitor of chemical dosing system consists of nitrite, molybdate and phosphate with a strong synergistic inhibition effect especially to the carbon steel, copper and aluminum. The corrosion types it can prevent include: uniform corrosion, crevice corrosion, pitting corrosion and stress corrosion. It has a good heat resistance and applicable to the closed soft water system like chilled water system and high temperature water system.
3.2 Biological Control We adopt efficient broad-spectrum biocide which has a good sterilizing effect to the heterotroph, iron bacteria, sulfate reducing bacteria and various algae. It is compounded by the base glutaraldehyde, cationic surface active agent and assistant, and able to inhibit the process of microbial protein synthesis and destruct the cell membrane to cause the death of microorganism efficiently. The product can sterilize efficiently and quickly with a long term of effect and applicable to a wide PH value range especially in the low alkali condition.
Dosing method of Chlorine dosing system
4.1 Irregular dosing according to the water quality detection result
4.2 Continuous dosing: Continuous discharging and adding of water with dosing
4.3 Regular dosing: change water with dosing at regular intervals. As water change consumes large quantity of cold energy, partial discharge and partial supplement will be applied in general, as well as partial discharge and supplement of chilled water every few months
4.4 Automatic dosing control: the dosing can be controlled through the conductivity and discharge quantity of the chilled water indicated by the detectors.
Application of Chlorine dosing system in the ice storage system
I. Common problems of ice storage system
In order to obtain 0℃ ice in the ice making operation period, the evaporation temperature of the refrigerant of the ice storage air conditioning system always needs to be lower than the evaporation temperature of the air conditioner, thus, the secondary refrigerant of lower freezing point temperature is required. The secondary refrigerant at one side of the refrigeration host of the ice storage air conditioning system is ethylene glycol solution for most occasions. However, the pipeline under vacuum condition or its long-term running will lead to dissolved oxygen in the ethylene glycol solution inevitably. The ethylene glycol is easy to be oxidized into ethylene glycol derivatives such as glycolic acid, glyoxalic acid and oxalic acid which cause the solution to be acidic. Besides, it will lead to electrochemical corrosion to the metal because of the existence of oxygen.
II. Technological process of Chlorine dosing system
III. Chemical treatment of Chlorine dosing system in ice storage system
3.1 Corrosion inhibitor Attributed to the toxicity and serious pollution of the nitrate and chromate of the traditional anodic inhibitor, it has been used less and less. The compound corrosion inhibitor of chemical dosing system from Peide Water Treatment Equipment Co.,Ltd adopt makes use of the mutual coordination between each ingredients of the compound corrosion inhibitor, especially the interaction between different molecules or ions in the absorbed layer, so it has improved the surface coating or formed a molecule layer. The interaction of the absorbents has not just improved the stability of the absorbed layer but also increased the inhibition effect of the compound corrosion inhibitor.