33results about How to "Control escape" patented technology

An absorption tower for simultaneously removing sulfur dioxide and nitrogen oxide in smoke comprises a removed sulfur absorption liquid circulation tank, a concentration cooling area, a removed sulfur absorption area, a smoke hardening and tempering area, a removed niter absorption area, an ammonia escape control area and a demisting area, wherein the removed sulfur absorption liquid circulation tank and the concentration cooling area are isolated through a sealing tower plate; every two adjacent areas of the concentration cooling area, the removed sulfur absorption area, the smoke hardening and tempering area, the removed niter absorption area and the ammonia escape control area are separated by one tower plate provided with uniform distribution hoods; and a smoke inlet is formed in the lower end of the concentration cooling area, and a smoke outlet is formed above the demisting area. Removed sulfur and removed niter in the absorption tower can be absorbed in absorption manners such as spraying absorption, spraying and filling absorption, tower plate type absorption, and the like, and the absorption manners can be conveniently combined; a smoke hardening and tempering device can perform hardening and tempering in a gas state manner or a liquid state manner; and with the adoption of acid characteristics of a removed sulfur absorption liquid, the escape of ammonia in the denitration smoke is controlled. The absorption tower integrates multiple functions, so that system energy consumption is reduced.

The invention discloses a desulphurization denitration dedusting ultra-low discharge process and system for producing cement from high-sulfur raw materials. The process comprises the steps of cement clinker firing, coarse dedusting, semi-dry desulphurization, fine dedusting, desulphurization ash treatment, flue gas blending and low-temperature SCR denitration. The system comprises a cement clinkerfiring system, a kiln tail high-temperature fan, a grinding system, a first dust collector, a semi-dry desulphurization tower, a second dust collector, a low-temperature SCR denitration reactor, a kiln head dust collector and a kiln head induced draft fan. A gas outlet of the kiln tail preheater C1, the kiln tail high-temperature fan, the grinding system, the first dust collector, the semi-dry desulfurization tower, the second dust collector, a relay fan, the low-temperature SCR denitration reactor, an exhaust fan and a kiln tail chimney are sequentially connected and arranged; an air outletof a cooler, the kiln head dust collector and the kiln head induced draft fan are sequentially connected; and the outlet of the kiln head induced draft fan is connected with a gas outlet of the seconddust collector. According to the invention, a semi-dry desulfurization and low-temperature SCR denitration process is adopted, so that ultra-low discharge of desulfurization, denitration and dedusting for producing the cement from the high-sulfur raw materials is realized.

The invention discloses a stainless steel acid-washing acid mist inhibitor and a preparation method thereof. The stainless steel acid-washing acid mist inhibitor comprises the following components in percentage by weight: 0.2 to 1.0 percent of non-ionic surfactant, 0.1 to 0.3 percent of anionic surfactant, 0.5 to 1.0 percent of foam stabilizer and the balance of water. The non-ionic surfactant is one or more of higher fatty alcohol polyoxyethylene ether, higher fatty acid polyoxyethylene ether and higher fatty amine polyoxyethylene ether, wherein the number of alkyl carbon is 10 to 26; and the addition number of ethylene oxide is 5 to 20. The anionic surfactant is long chain alkyl sodium sulfonate, long chain alkyl sulfate or long chain alkyl sodium benzenesulfonate, wherein the number of alkyl carbon is 8 to 18. The foam stabilizer is low-carbon fatty amine or inorganic ammonium salt. The stainless steel acid-washing acid mist inhibitor has the characteristics of simple components, no organic solvent and the like, has high film-forming speed, high and stable film-forming thickness and high acid mist inhibition efficiency, and has obvious acid mist inhibition effect particularly under the condition of high nitric acid concentration when stainless steel is mixed with acid to perform acid washing.

A small circulating lubrication system cooled by using liquid nitrogen comprises a liquid nitrogen refrigerating system and a lubrication oil circulating system. The cooling speed of lubricating oil in an oil supply pipe of the lubrication system is increased; and moreover, the lubrication oil which is heated by using a plate radiator is recycled. The whole small circulating lubrication system is simple in structure and convenient to operate, and is economical and practical.

The invention provides an ammonia pre-spraying system and process for desulfurizing and denitrating activated carbon. The ammonia pre-spraying system comprises an ammonia pre-spraying device and an adsorption tower; the ammonia pre-spraying device comprises an ammonia pre-saturation bin, the activated carbon pre-arranged in the ammonia pre-saturation bin adsorbs ammonia gas entering the ammonia pre-saturation bin to obtain ammonia pre-saturated activated carbon, the adsorption tower is provided with an activated carbon inlet, the ammonia pre-saturated activated carbon from the ammonia pre- spraying device enters the adsorption tower through the activated carbon inlet, and the adsorption tower is used for flue gas desulfurization and denitration reactions. The ammonia pre-spraying process for desulfurizing and denitrating the activated carbon adopts the combination of the ammonia pre-spraying device and an ammonia spraying section to form a combined cooperative denitration process, andthe activated carbon is subjected to ammonia pre-saturation treatment before entering the adsorption tower, so that denitration efficiency is further improved, ammonia escape can be controlled, ammonia consumption is saved, and economy is improved.

The invention provides a device and method for 3D printing of high-nitrogen steel products through a nitrogen arc and nitride. Overlaying shaping of high-nitrogen steel with a set layer height is carried out through a nitrogen arc wire feeding material increase manufacturing method under normal pressure, and meanwhile nitride alloy powder is added into a molten pool through nitrogen powder feeding. A spiral air powder groove is bored in the inner wall of a coaxial spiral air powder cover, the nitride alloy powder forms air powder cyclone at a welding gun opening, the loss caused by scattering of the nitride alloy powder when the nitride alloy powder flows out of the welding gun opening is reduced, and meanwhile the effect that the nitride alloy powder and molten drops at the end of a solder wire are fully metallurgically smelted and then enter the molten pool is guaranteed. By controlling parameter matching of 3D printing, high-nitrogen steel printing layers with different nitrogen contents can be obtained. A synchronous and coaxial powder adding and wire feeding method with the nitride alloy powder and the solder wire is adopted, so that 3D printing of the high-nitrogen steel products through a technology integrating the common steel solder wire, the nitride alloy powder and the nitrogen arc is realized under normal pressure.

The invention provides a device for 3D printing of a high-nitrogen steel product through nitrogen arc and nitrides and a method thereof. Surfacing forming of high-nitrogen steel with set layers is achieved at the ordinary pressure through a nitrogen arc wire feeding additive manufacturing method, and nitride alloy powder is added into a molten pool through nitrogen powder feeding. Spiral gas powder grooves are bored in the inner wall of a coaxial spiral gas powder cover. The nitride alloy powder forms rotary gas powder flow at a welding gun muzzle, the loss caused by scattering when the nitride alloy powder flows out of the gun muzzle is reduced, and the effect that the nitride alloy powder and molten drops at the ends of welding wires are fully and metallurgically smelted and then enter the molten pool is ensured. By controlling parameter matching of 3D printing, high-nitrogen steel printing layers with different nitrogen contents can be obtained. The mode of nitride alloy powder and welding wire synchronous coaxial power adding and wire feeding is adopted, and 3D printing of the high-nitrogen steel product at the ordinary pressure is achieved through a common steel welding wire-nitride alloy powder-nitrogen arc composite technology.

A small circulating lubrication system cooled by using liquid nitrogen comprises a liquid nitrogen refrigerating system and a lubrication oil circulating system. The cooling speed of lubricating oil in an oil supply pipe of the lubrication system is increased; and moreover, the lubrication oil which is heated by using a plate radiator is recycled. The whole small circulating lubrication system is simple in structure and convenient to operate, and is economical and practical.

The disclosure relates to an activated coke adsorption tower and a method for activated coke adsorption and purification of flue gas. The activated coke adsorption tower of the present disclosure sets the active coke adsorption zone and the gas buffer zone and makes the flue gas enter the upper gas buffer zone first, so that the flue gas is adsorbed by cross-flow contact with the active coke in the upper part of the active coke adsorption zone and is absorbed in the tower. Horizontal baffle flow to pass through the active coke adsorption area multiple times to form multi-stage adsorption, and then the flue gas adsorbed in the upper part is sent to the lower part of the active coke adsorption area through the gas pipeline, and the adsorbed flue gas flowing down from the upper part of the adsorption area Active coke cross-flow contact of sulfur oxides, the pores of the lower active coke store the converted H in the desulfurization process 2 SO 4 , containing H 2 SO 4 Activated coke has a high reactivity to ammonia and can fully capture excess ammonia in the flue gas, thereby effectively controlling the escape of ammonia in the clean flue gas and avoiding secondary pollution of ammonia.

The invention discloses a flue gas desulfurization and denitration process and device for recovering ammonium sulfate. The flue gas desulfurization and denitration device comprises an absorption tower, a crystal extracting and concentrating tank and an ammonia storage tank, wherein the absorption tower is sequentially provided with a defogger layer, a desulfurization spraying layer, a denitration spraying layer, a liquid accumulation layer, a concentrated solution spraying layer and a concentration tank from top to bottom; the crystal extracting and concentrating tank is communicated with the concentration tank, and the downstream side of the crystal extracting and concentrating tank is sequentially connected with a swirler and a centrifuge; the inside of an oxygen tank is partitioned into a regulation zone and an oxidation zone which are both communicated to the liquid accumulation layer, the regulation zone is communicated with the denitration spraying layer through a denitration circulating pump, the oxidation layer is respectively communicated with the desulfurization spraying layer and the concentration tank through a desulfurization circulating pump, and the bottom of the oxidation zone is provided with an oxidation air duct above which a plurality of layers of porous plates are arranged; and the ammonia storage tank is used for adjusting the pH value of slurry from the liquid accumulation layer. On the premise of ensuring higher desulfurization efficiency, the flue gas desulfurization and denitration process and device can be used for effectively controlling escape of sulfur dioxide and ammonia of a system, greatly increasing the denitration efficiency of the system and realizing the large-particle crystallization of ammonium sulfate crystals.

The utility model provides microwave sintering of an ultra-fine grain titanium carbonitride group cermet. A 300MHz to 8GHz microwave frequency medium is used as a heat source to enable a billet of the ultra-fine grain titanium carbonitride group cermet to absorb microwave energy to complete the sintering process. During the sintering process, vacuum and atmosphere protection microwave heating andsintering techniques are adopted respectively according to the ratio of carbon to nitrogen of the billet of the ultra-fine grain carbon titanium nitride cermet. The 300MHz to 8GHz microwave frequencyis used to heat and sinter the billets of the titanium carbonitride group cermet with different ratio of carbon to nitrogen and vacuum microwave sintering and atmosphere protection microwave sintering technological proposals are used respectively for the billets of the titanium carbonitride group cermet with the different ratio of carbon to nitrogen, which overcomes the defects of the prior vacuum or atmosphere protection sintering techniques, such as low heating efficiency, long sintering time, large energy consumption, serious environment pollution and oversized grains, and the like. The microwave sintering can be widely applied to sintering other ceramics, ceramic matrix composites and intermetallic compound materials with stronger microwave absorbing capacity.