39results about How to "Prevent acid corrosion" patented technology

The invention provides an integrated separation method of MTO reaction gas, wherein the MTO reaction gas is sent to a water-gas separating tower after being cooled to dew point. The method not only effectively removes silica-alumina molecular sieve type catalyst powder and acid oxygen-containing organic compounds to prevent acid corrosion to the subsequent compressor and separating equipment, but also recovers most organic compounds and water in MTO reaction products for further process and reuse. Processing MTO reaction gas by the process and conditions provided in the invention can increase the content of ethylene and propylene in alkenes to above 70%, reduce the content of catalyst powder in water obtained from solid-liquid separation below 300 mg / L; thereby provides conducive conditions for subsequent process of alkenes gas and waste water, and can be easily used in industry application.

The invention relates to the technical field of toothpaste, in particular to a traditional Chinese medicine composition for toothpaste, a preparation method of the traditional Chinese medicine composition, finished toothpaste and a preparation method of the finished toothpaste. The traditional Chinese medicine composition is prepared from the following traditional Chinese medicine components in percentage by weight: 10%-20% of embelia laeta, 20%-30% of alkali, 20%-30% of rhizoma zingiberis, 10%-20% of ferula asafetida and 10%-20% of cumin. Wherein the embelia laeta can eliminate various pathogenic bacteria in a human body and effectively play a role in tooth moth prevention; the alkaline flower is alkaline, can prevent acidic corrosion of teeth, has digestion and absorption effects, and is beneficial to digestion of food residues in the oral cavity; the dried ginger is warm in nature and has the effects of improving blood circulation of the oral cavity and removing ozostomia; ferula asafetida is warm in nature and can relieve undefined pain of whole teeth caused by the uplift disease (namely wind or qi in traditional Chinese medicine); cumin can eliminate gingival abscess; the five medicinal materials are matched to remove halitosis, prevent moths and acid, relieve raised teeth, eliminate swelling of gingiva and improve oral blood circulation.

The invention discloses a straight-stroke support which comprises an upper flange, a lower flange, a sleeve part and a driving walking part. The driving walking part comprises a driving sleeve, a main shaft, a fixing ring, a straight walking rod and a connecting end cover. The driving sleeve and the main shaft are connected in a thread mode. The driving sleeve is made of copper. The driving sleeve is fixed in the straight walking rod through threads. The driving walking part further comprises a pressing cover, a limiting ring, a pressing ring, a driving sleeve pressing block and a thrust ball bearing. The pressing cover, the limiting ring, the pressing ring and the driving sleeve pressing block are all made of cast iron STSi5R. According to the straight-stroke support, a valve and an actuator can be effectively connected, circle rotating is converted into straight line walking, gas etching, acid etching, water erosion and oxidation can be effectively avoided, vibration and noise are low, attractiveness and safety are achieved, environment is protected, and adaptability is high.

A flue gas sampling system relates to a sampling system and solves the problems that when the gun barrel of a conventional flue gas sampling system is inserted into or extracted out of the chimney flue, gun head deformation or damage and direct flue gas intake are caused by collision, dust particles in flue gas are adhered to the inner wall of the gun barrel and an absorption bottle to cause sampling channel blockage which influences analysis to flue gas components, part of pipeline section of the gun barrel is exposed in low temperature air, and sulfur dioxide and sulfur trioxide in the flue gas inside the pipeline section are easy to coagulate, resulting in inaccurate analysis to flue gas components. The flue gas sampling system comprises a sampling gun, the absorption bottle and a sampling pump; the sampling gun further comprises a protective cover, a filter system and a heating system; a heating sleeve is mounted on the gun barrel; the protective cover comprises a flange plate, a guard ring and a plurality of pillars, and the flue gas entry end of the gun barrel is inserted into the middle of the flange plate; the filter system comprises a filter cylinder and a protective screening; the filter cylinder is arranged between the guard ring and the flange plate. The flue gas sampling system provided by the invention is used for sampling flue gas of a chimney flue at the outlet of a fuel electric plant denitration system.

The invention discloses a protective agent of a pile head of a storage battery and a preparation method thereof. The protective agent comprises the following components by weight percent: 25%-35% of antioxidant, 10%-15% of mineral oil, 5%-10% of penetrating agent, 20%-25% of anticorrosive additive and 15%-25% of LPG (liquefied petroleum gas) propellant. When the protective agent is used, a package bottle is close to the sprayed position for spraying, and the proper spraying amount is applied. The protective agent can form a long-acting temperature-resisting film so as to protect the pile headof the storage battery, a charging clip and a circuit joint; the protective agent can prevent oxidation and maintain the good contact of the storage battery; the protective agent can prevent the acidic corrosion of the storage battery; and the protective agent can prevent instant impedance and voltage drop.

The invention relates to an ethylene glycol coolant circulating system which comprises a refrigerating machine, a heat exchanger, a coolant tank, a control system, a PH transmitter and an alkali solution storage tank, wherein a solution output tube of the alkali solution storage tank is connected to a main transmission tube which is communicated with the coolant tank, the PH transmitter is installed on the coolant tank, a signal collected by the PH transmitter is transmitted to the control system, and a filling pump is installed on the main transmission tube. Acidic corrosion after oxidization of the coolant can be effectively avoided.

The invention relates to a steam condensate corrosion inhibitor for an industrial boiler. The corrosion inhibitor is prepared from the raw materials in percentage by weight: 5-10% of dodecylamine acetate or octadecylamine acetate, 60-80% of cyclohexane or morpholine, 3-10% of ethanediamine tetramethene sodium phosphate and 100% of distilled water or deionized water. The corrosion inhibitor can form a compact protective film on the surface of metal; remove carbon dioxide in condensate; and prevent the boiler from scaling when the boiler feed water hardness does not meet the standard and the like. The corrosion inhibitor provided by the invention has the characteristics of small addition of medicine, low water treatment cost, good corrosion effect and the like, and is easy to operate. The corrosion inhibitor is used for recycling steam condensate for the industrial boiler, and has a remarkable effect on energy conservation and emission reduction.