Treatment and utilization of device exhaust gases
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As efforts to save energy and reduce emissions gain momentum, along with the increasing demands for safety and environmental protection as well as more efficient use of energy, refineries are phasing out flares. Let’s all discuss where the waste gases from various containers in our facilities are sent and how they are utilized. Environmental protection is becoming increasingly important and more widely recognized – it’s a meaningful issue! This post was last edited by chengkang on 2009-2-27 07:03]
We installed a gas holder with a capacity of 20,000 cubic meters; all the low-pressure gas is sent into this holder, and after compression and desulfurization, it enters the plant’s high-pressure gas network to be used as fuel and as a raw material for hydrogen production. Yet this is not even enough. For clarification, the overhead gas from the atmospheric and vacuum distillation towers goes directly into the heater for combustion; there is no gas receiver nearby.
Ours is also an intake cabinet, and after being pressurized by a compressor, the gas is sent into the gas pipeline network.
After entering the pipeline network, it goes to the gas holder, and then the compressor compresses it for combustion in the furnace.
Throughout the entire process, there is a recycling process for desulfurization to recover sulfur.
Facilities with coking or hydrogen production units generally need to have gas holders and compressor recovery systems; the recovered gas is first used for hydrogen production, and the remaining gas is used as fuel. . . :lol
It enters the flare system, mainly the gas holder, and then is burned in the furnace
After pressure increase in the intake tank, it goes through desulfurization and is then used as a raw material for hydrogen production or fed into the gas pipeline network
The main components of calcium carbide exhaust gas are: carbon monoxide (content 75%–90%), hydrogen (content 2%–10%), methane (content 2%–4%), etc. Due to its high carbon content and low hydrogen content, it is difficult to use for the synthesis of methanol and ammonia. It can however be used as a gaseous fuel to burn in boilers to generate steam for heating, or as a domestic fuel.
1. The advanced desulfurization unit in our facility is used to remove hydrogen sulfide from the dry gas; this sulfur-containing acidic gas is then sent to the sulfur recovery unit. 2. The dry gas after desulfurization is sent to the styrene production unit where ethylbenzene and styrene are manufactured, while the propane-rich gas is returned to the DCC unit for propane recovery. 3. The dry gas from which propane has been extracted is sent to the hydrogen production unit to obtain hydrogen, which is then used in the hydrogenation units (hydrogen production and hydrodenation units were put into operation this year). 4. The remaining dry gas is sent to the gas pipeline network to supply gas throughout the plant, with any excess being stored in gas storage tanks.
When the dry gas is sent to the heating furnace for combustion treatment!
When the dry gas is sent to the heating furnace for combustion treatment!
Keep the system pressure within the design limits, properly vent high-purity off-gases, and ensure the purity of the recycled hydrogen.
Our unit introduces the low-pressure exhaust gas from the stripping tower into the heating furnace for combustion by adding vacuum burners； High-pressure exhaust gas is fed into PSA for concentration and recovery ； The low-pressure gas, after centralized desulfurization and pressure increase, also enters the PSA unit for concentration and recovery ；
Sent to the heating furnace in the atmospheric and vacuum distillation unit for combustion!
Recycle components such as ethylene, propylene, and methane from it
Reforming tail hydrogen removal, diesel hydrogenation, hydrocracking, sulfur unit, aromatic hydrogenation unit. Removing part of the generated gas – still consider it a waste to simply discharge the gas, as hydrogen has a very low calorific value
The dry gas is used to lift steam in the riser; some of it goes to the combustion chambers and steam boilers as fuel, in order to balance the total amount of gas in the plant
The desulfurized exhaust gases from the gasoline and liquefied gas we process are released into the large chimney of our waste heat boiler! !
The dry gas produced by our facility is desulfurized before being sent to the high-pressure gas network. It is then used in the following ways: 1. burned in the boilers of thermal power plants; 2. used as fuel in the heating furnaces in various workshops; 3. and a portion of it is used to keep the flares lit continuously