A kind of fuel gas recycle device
Technical field
The utility model relates to a kind of fuel gas recycle device.
Background technique
In Methanol fuel with high cleanness device, the fuel gas that oil product separate absorbent column overhead tank is discharged is directly incorporated into fuel gas pipe network, for oven and torch altar lamp which burns day and night igniting.The fluctuation of current absorption tower discharge fuel atmospheric pressure, tolerance is comparatively large, oven and torch also unstable to the use amount of fuel gas, cause the pressure surge of fuel gas pipe network and fuel gas serious waste phenomenon.
Model utility content
The technical problems to be solved in the utility model is that the pressure surge of existing oil product separate absorbent tower fuel gas pipe network is comparatively large, fuel gas serious waste phenomenon; In order to solve the problem, the utility model provides a kind of fuel gas recycle device, comprise fuel gas knock out drum, described fuel gas knock out drum is connected with oil product separate absorbent tower with LPG vaporizer respectively by the first pressure regulator valve group, the liquid gas that LPG vaporizer produces and the fuel gas that oil product separate absorbent tower produces, before being transported to gas equipment, first carry out buffering voltage stabilizing process through fuel gas knock out drum; Described fuel gas knock out drum roof hatch is connected with fuel gas pipe network by the second pressure regulator valve group, and described fuel gas pipe network is connected with each gas equipment; Described fuel gas knock out drum top is also connected with safety valve emptying pipeline and emptying total pipeline by pneumatic pressure-regulating valve and angie type spring safety valve; Described oil product separate absorbent tower is connected with emptying total pipeline by the 3rd pressure regulator valve group, also passes through the 3rd pressure regulator valve group and angie type spring safety valve and described safety valve emptying pipeline; Collecting tank is connected to by leading pouring blow-off line bottom described fuel knock out drum; Described fuel gas knock out drum outer wall is provided with pressure gauge, thermometer, liquid level instrument and pressure regulator; Described 3rd pressure regulator valve group is provided with pressure control unit, and the pressure signal that described pressure control unit is fed back by described pressure regulator carries out pressure adjustment.
Preferably, described second pressure regulator valve group and the 3rd pressure regulator valve group include self-contained pressure regulator and Flange Ball Valves.
Preferably, described first pressure regulator valve group comprises Flange Ball Valves, flange check valve and Flange Gate Valves.
The beneficial effects of the utility model are: 1, by the fuel gas from oil product separate absorbent tower and the liquid gas from LPG vaporizer are connected to fuel gas knock out drum respectively by pipeline, by regulating pneumatic pressure-regulating valve, both ensure that the timely gas of gas equipment, the pressure stability of output fuel gas can be made again at a numerical value, be convenient to the stable of production status, 2, because the output pressure ratio fuel gas knock out drum operation pressure setting value of LPG vaporizer technique initialization gas is low, and the pressure ratio fuel gas knock out drum operation pressure that oil product separate absorbent tower exports fuel gas is high, therefore when knock out drum pressure exceeds the output gas pressure of LPG vaporizer technique initialization, LPG vaporizer is automatically out of service, no longer export liquid gas, so just only can utilize the fuel gas that oil product separate absorbent tower exports, save a large amount of liquid gas, when knock out drum pressure is lower than LPG evaporator pressure, LPG vaporizer and oil product separate absorbent tower work simultaneously, ensure that the normal operation of gas equipment, 3, owing to having set up fuel gas knock out drum, can additional storage fuel gas for device, can emergencing action be played, and avoid the waste of fuel gas.
Accompanying drawing explanation
Fig. 1 is linkage structure schematic diagram of the present utility model;
In figure, 1, fuel gas knock out drum; 2, LPG vaporizer; 3, oil product separate absorbent tower; 4, the second pressure regulator valve group; 5, the 3rd pressure regulator valve group; 6, fuel gas pipe network; 7, safety valve emptying pipeline; 8, emptying total pipeline; 9, collecting tank; 10, Flange Gate Valves; 11, pressure gauge; 12, thermometer; 13, liquid level instrument; 14, pressure control unit; 15, pressure regulator; 16, angie type spring safety valve; 17, Flange Ball Valves; 18, flange check valve.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is further described.
As shown in Figure 1, a kind of fuel gas recycle device of the present utility model, comprise fuel gas knock out drum 1, LPG vaporizer 2 and oil product separate absorbent tower 3, fuel gas knock out drum 1 is connected with oil product separate absorbent tower 3 with LPG vaporizer 2 respectively by the first pressure regulator valve group, the liquid gas that LPG vaporizer produces and the fuel gas that oil product separate absorbent tower produces, before being transported to gas equipment, first carry out buffering voltage stabilizing process through fuel gas knock out drum; Fuel gas knock out drum 1 roof hatch is connected with fuel gas pipe network 6 by the second pressure regulator valve group 4, and fuel gas pipe network 6 is connected with each gas equipment; Fuel gas knock out drum 1 top is also connected with safety valve emptying pipeline 7 and emptying total pipeline 8 by pneumatic pressure-regulating valve and angie type spring safety valve 16, and the safety pressure of safety valve is 0.8MPa, causes damage to prevent fuel gas system overpressure to equipment pipe; Oil product separate absorbent tower 3 is connected with emptying total pipeline 8 by the 3rd pressure regulator valve group 5, is also connected with safety valve emptying pipeline 7 with angie type spring safety valve 16 by the 3rd pressure regulator valve group 5; Angie type spring safety valve 16 automatic take-off when the pressure of tank exceeds setting value, prevents pressure from exceeding standard and causes blast; Being connected to collecting tank 9 by leading pouring blow-off line bottom fuel gas knock out drum 1, leading pouring blow-off line and being provided with Flange Ball Valves 17; Fuel gas knock out drum 1 outer wall is connected with pressure gauge 11, thermometer 12, liquid level instrument 13 and pressure regulator 15 by Flange Gate Valves 10; 3rd pressure regulator valve group 5 is provided with pressure control unit 14, and the pressure signal that pressure control unit 14 is fed back by described pressure regulator 15 carries out pressure adjustment.Fuel gas knock out drum outer wall is also connected with two Flange Gate Valvess 10, for emergency processing.
Second pressure regulator valve group 4 and the 3rd pressure regulator valve group 5 include self-contained pressure regulator and Flange Ball Valves 17.
First pressure regulator valve group comprises Flange Ball Valves 17, flange check valve 18 and Flange Gate Valves 10, and flange check valve 18 can prevent liquid or gas backflow, and Flange Gate Valves 10 can realize blocking fast.
The utility model is in real work, when Methanol fuel with high cleanness device regenerated catalyst, need to run catalyst regeneration oven, now, pressure from oil product separate absorbent tower is the fuel gas of 1.0 MPa ~ 1.4MPa and enters fuel gas knock out drum from LPG vaporizer 0.4MPa liquid gas simultaneously, the fuel gas knock out drum pressure that operator show according to pressure gauge, the pneumatic pressure-regulating valve coming fuel metering gas inlet pipeline is installed is to control the size of fuel gas emptying amount, make fuel gas knock out drum internal pressure stabilises between 0.5MPa ~ 0.6MPa, then the self-contained pressure regulator of fuel gas on the fuel gas outlet conduit of knock out drum top, fuel gas pipe network is incorporated to by after fuel gas Pressure Drop to 0.35MPa, be delivered to each gas equipment, both ensure that the timely gas of each gas equipment, production status is made again to stablize.After the pressure of fuel gas knock out drum 1 is more than 0.4MPa, LPG vaporizer automatically can quit work under the effect of the first pressure regulator valve group, no longer export liquid gas, at this moment the fuel gas system by-product fuel gas that will oil product separate absorbent tower be used completely to produce, this by-product fuel gas is delivered in fuel gas knock out drum by the pressure control unit of the second pressure regulator valve group.Waste liquid is discharged in collecting tank by the pouring blowdown valve of leading that operator need timing to open and arrange bottom fuel gas knock out drum, cause the nozzles of oven or torch to damage in case combustable liquid or impurities accumulation bring fuel gas pipe network into, hydro carbons wherein and other useful constituents can also be collected separating-purifying again.
Fuel gas recycle device of the present utility model, according to the production scale of 200,000 tons/year of Methanol fuel with high cleanness, annual three reactor catalysts regeneration duration about 3000 hours altogether, mean consumption fuel gas per hour is about 150Nm
3if use 10 yuan/Nm
3liquid gas, 4,500,000 yuans need be spent every year; If use oil product to be separated the fuel gas of emptying, belong to waste utilization, without any need for extra-pay, a large amount of fuel costs can be saved.
Set forth a lot of detail in the above description so that fully understand the utility model.But above description is only preferred embodiment of the present utility model, the utility model can be much different from alternate manner described here to implement, and therefore the utility model is not by the disclosed concrete restriction implemented above.Any those skilled in the art are not departing under technical solutions of the utility model ambit simultaneously, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model protection.