Technical Field
The utility model relates to a kind of electric mixed heated SSCR module of the device produces the ammonia, is mainly applied to the SCR of the car exhaust gas post-processing industry.
Background Art
The automobile exhaust emissions can cause serious pollution of the atmosphere, the main pollutants of hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx) and particulate matter (PM). Since the 20 century 70 age people began efforts to control automobile exhaust emissions since, has developed increasingly stringent emission regulations. For the implementation of the "people's Republic of China of atmospheric pollution", strict control on motor vehicle pollution, the full implementation of the "light automobile emission limit value and the measurement method (China's five stage)" (GB18352.5 - 2013) and "vehicle compression ignition, gas fuel spark-ignition engine and automobile exhaust pollutant emission limits and measuring method (China III, IV, V phase)" (GB17691 - 2005) in the standard requirements of the 5th stage discharge, from National self-1 January 2017, all manufacturing, import, sales and registration of the light petrol vehicles, heavy-duty diesel vehicles (passenger car and bus, sanitation, postal use), shall be conforms to the five standard requirements. Therefore, the automobile exhaust gas purifying technology provides greater challenges, higher requirements.
SCR (Selective Catalytic Reduction) catalytic reduction technology is the traditional post-processing technology. By adopting the liquid urea of the traditional SCR technology is essentially utilize urea decomposes under the high temperature ammonia, the ammonia as a reducing agent of NOx in the engine exhaust gas in the catalyst and the temperature of the integrated under the action of the reaction, under the conditions of an ideal to produce non-toxic N2 and H2O, thereby achieving the purpose of purification. However, the traditional SCR system for liquid urea reducing agent facing the freezing in winter and heat insulation thawing problems, urea and the exhaust gas temperature under the condition of relatively high, it is easy to form a condensate of hard, further stopping urea reducing agent nozzle or piled in the exhaust pipe, cause the engine exhaust back pressure rises, to reduce the vehicle fuel economy.
Therefore, how to obtain low cost and high performance of the NH3 reducing agent supply device is particularly important. The use of metal chloride with ammonia to form coordination compounds of this characteristic, the ammonia gas is fixed down, use of the metal chloride is mainly alkaline earth metal chloride, strontium chloride, calcium chloride, magnesium chloride, and must be auxiliary additive component. Ammonia synthesis of compound material formed as a vehicle-mounted reducing agent ammonia an ammonia, when in use by heating to achieve desorption release the ammonia gas, the ammonia gas with the metal chloride to adsorb and desorb a is a reversible process.
Because the ammonia desorption of heat absorption process is, therefore a need to increase the ammonia storage device in the heat source, in the Patent number CN 102733913 B (double-stage waste heat mode [...] ammonia system) in discloses a backflow of the coolant of the engine waste heat to heat the active chu anhua compound, release leaves the ammonia of the after-treatment system. The Patent number CN 103470347 A (used for producing the ammonia of the equipment) with the introduction of the ammonia generating device, wherein the 2nd 1st heating device and heating device are respectively installed in the main memory and the secondary memory internal and independent operation. The Patent number US2012/0045379 A1 (a uses the vacuum pump from the solid ammonia in the material storage and supply ammonia gas), introduced the method of storing and delivering ammonia, ammonia material for the heating means of the built-in electric heating or external microwave heating or infrared heating. The Patent number CN 104234796 A (in particular for a motor vehicle exhaust system with optimized filling time of ammonia saves the tube) introduced with ammonia derives the channel built-in heating or enclosed heating of the ammonia storage tube.
Content of the invention
The purpose of the utility model is to provide a electrical mixed heated SSCR module of the device produces the ammonia, it can solve the northern winter liquid urea freezing, a vehicle cold start when the normal operation of the SCR system enters the state of the problem of slow, at the same time the total weight of the device is reduced, simplifying the assembly and disassembly.
The technical proposal of the utility model is realized in the way: an electric mixed heated SSCR module of the device produces the ammonia, by [...], ammonia material, produces the ammonia device casing, an electric heating rod, the ammonia gas outlet pipe, angle valve, fast interface of the female end, producing ammonia device end gas outlet, fast interface of the male end, the tail gas post-processors, characterized in that cylindrical [...], [...] value are arranged in the rectangular structure inside the casing of the device produces the ammonia, an ammonia tank top and the lower end of the port through the device produces the ammonia of the shell the two ends of the sealing of the shell, use of an ammonia material is filled in the tank interior, the air outlet of the device produces the ammonia in the exhaust gas produces the ammonia device on one side of outer shell of the vertical walls of the transfer, fast interface the female end is located at the other side of the device produces the ammonia of the vertical walls of the outer shell of the lower position, the female end is fast interface produces the ammonia device end gas inlet, an electric heating rod from the [...] above the center of the tank interior is inserted into the ammonia, the ammonia gas outlet pipe is connected with the top surface of the [...], angle valve is connected to the ammonia outlet pipe on the road, the exhaust gas after-treatment of the male end and the fast interface device produces the ammonia fast interface on the housing of the female end connection.
The [...] has 5L - 40L of the volume, the tank wall thickness is 2 mm - 4 mm.
The electric heating rod is cylindrical, its diameter is 40 mm - 60 mm, axial length less than the length of the [...] 30 - 40 mm, the heating power of 300W - 600W, with the vehicle-mounted power supply connected to the power supply.
The produces the ammonia device casing, its internal [...] welding for producing ammonia device middle part of the housing, the outer wall of the device produces the ammonia [...] shell is a minimum distance between the 20 mm - 50 mm.
The ammonia gas outlet pipe and the inner diameter of 0.5 cm - 1.5 cm, wall thickness is 2 mm - 3 mm.
The quick interface of the female end is trumpet-shaped, the diameter of the exhaust gas along the direction of the air flow is gradually reduced, large diameter is 140 - 160 mm, the small diameter is 70 - 90 mm, length of 80 - 100 mm; mounted on the processing of the exhaust gas after the fast interface of the male end, along the direction of the air flow and the diameter of the exhaust gas is reduced gradually, large diameter for the 138 - 158 mm and, small diameter is 68 - 88 mm and, length is 80 - 100 mm.
The produces the ammonia [...] shell and welding together the two ends of the shell has a thickness of 2.5 mm - 4 mm, the thickness of the shell to the other side of the 1.5 mm - 2.5 mm.
The use of an ammonia synthesis material can be strontium chloride or ammonia synthesis of magnesium chloride or calcium chloride or ammonia synthesis with the NH3 chloride to form a complex.
The positive effects of the utility model is its simple structure, easily assembled and disassembled. The diameter of the pipe is not inserted, the streamlining of the pipeline connecting component, at the same time from the heat of the end plate of the shell as [...] head, not only saves the head of material also saves the fixing of the partition plate material, the entire device and environment obviously, device to reduce the total weight of 4 kg - 10 kg. The engine exhaust gas and an electric heating rod as the material is heated in an ammonia, has not only fully utilize the energy produced by the engine fuel, and improves the thermal efficiency of the engine, saving fuel consumption, but also has the electric heating rod fast temperature response advantages, combined may be realized by using ammonia gas quick release; this device is suitable for use in the northern cold area of the medium-sized trucks, electrical mixed heated SSCR module produces the ammonia of the SCR device is mounted on the rear side of the post-processors. In -20 °C under cold start conditions, use of an ammonia gas pressure in the tank only 10 min, can meet the SCR system can be normally operated. By this device after the measuring installation, the exhaust flow rate is 1300 kg/h exhaust back pressure only when the rising 3 kPa.
Description of drawings
Figure 1 is the chart of the of the present utility model.
Figure 2 is the cut-off ammonia device over-looking schematic view of the of the present utility model.
Mode of execution
The Figure below to further illustrate the utility model as: as shown in Figure 1, 2 is shown, an electrical mixing heated SSCR module of the device produces the ammonia, by [...] 1, ammonia material 2, producing ammonia device casing 3, an electric heating rod 4, the ammonia gas outlet pipe 5, angle valve 6, fast interface of the female end 7, producing ammonia device end gas outlet 8, fast interface male end 9, the exhaust gas post-processor 10 composition, characterized in that [...] 1 cylindrical, [...] 1 value is arranged in the rectangular structure of the apparatus housing produces the ammonia 3 internal, [...] 1 the top end and the lower end of the port through the produces the ammonia device casing 3 the upper and lower ends of the shell sealing, ammonia material 2 is filled in the [...] 1 internal, produces the ammonia device end gas outlet 8 opening in the produces the ammonia device casing 3 on one side of the vertical walls of the transfer, fast interface of the female end 7 produces the ammonia device located in the housing 3 and the other side of the vertical walls of the position lower, fast interface of the female end 7 produces the ammonia from tail gas is the air inlet, an electric heating rod 4 from the [...] 1 inserted into the [...] above the center of the 1 internal, ammonia gas outlet pipe 5 connected to the [...] 1 the top surface of the, angle valve 6 is connected to the ammonia gas outlet pipe 5 on the pipe line, the exhaust gas after-treatment 10 fast interface male end 9 and produces the ammonia device casing 3 fast interface on the female end 7 is connected.
The [...] 1 has 5L - 40L of the volume, the tank wall thickness is 2 mm - 4 mm.
The electric heating rod 4 is cylindrical, its diameter is 40 mm - 60 mm, the axial length is smaller than the [...] 1 length of 30 - 40 mm, the heating power of 300W - 600W, with the vehicle-mounted power supply connected to the power supply.
The produces the ammonia device casing 3, its internal [...] 1 welded producing ammonia device housing 3 of the middle part, [...] 1 produces the ammonia device with the outer wall of the casing 3 is a minimum distance between the 20 mm - 50 mm.
The ammonia gas outlet pipe 5 and the inner diameter of 0.5 cm - 1.5 cm, wall thickness is 2 mm - 3 mm.
The quick interface of the female end 7 is trumpet-shaped, the diameter of the exhaust gas along the direction of the air flow is gradually reduced, large diameter is 140 - 160 mm, the small diameter is 70 - 90 mm, length of 80 - 100 mm; mounted in the exhaust gas after-treatment 10 fast interface on the male end 9, along the diameter of the exhaust gas flow direction is reduced gradually, large diameter for the 138 - 158 mm and, small diameter is 68 - 88 mm and, length is 80 - 100 mm.
The produces the ammonia device casing 3 with the [...] 1 are welded together the two ends of the shell has a thickness of 2.5 mm - 4 mm, the thickness of the shell to the other side of the 1.5 mm - 2.5 mm.
The use of an material 2 can be ammonia or ammonia synthesis of strontium calcium chloride or magnesium chloride or ammonia synthesis with the NH3 chloride to form a complex.
The outer wall of the device produces the ammonia [...] shell is a minimum distance between the 20 mm - 50 mm, Figure 2 shown in the S1 regional and S2 for rapid interface area of the female end 7 of the area 3 - 4 times. For the convenience of assembly and disassembly, the exhaust gas post-processor fast interface male end 9 and fast interface of the female end 7 by matching the size of the different diameters of the quick inserting pipe. Heating device installed only by moving the heat removal device, so that the fast interface of the female end 7 and the exhaust gas after the fast on the processor of the interface of the male end 9 are inserted together, and a heat removal device can be fixed to the bracket on the frame of the vehicle, the process saves the mounting flange.
For manufacturing ammonia device desorption of ammonia gas in the heat from the engine exhaust gas and an electric heating rod 4 to the [...] 1 of the combined heating, the exhaust air temperature usually in 150 °C -450 °C, electric heating rod in 2 min in can be raised to 200 °C. From the exhaust gas after-processor 10 produces the ammonia the tail gas discharged via the fast interface of the female end 7 into the produces the ammonia device housing 3 in, flows through the [...] 1 and produces the ammonia device casing 3 in the region between the, produces the ammonia and the exhaust gas outlet from the device 8 is discharged, thereby realizing the exhaust gas to [...] of enclosed heating, ammonia tank storing the ammonia material 2 reaches the desorption temperature, release of ammonia by ammonia gas outlet pipe derived and enter the system of the next unit. In the low-temperature weather needs of fast [...], start the electric heating rod, can realize rapid release of ammonia. Device when in normal use, angle valve is in the open state, when the device needs to be replaced when the ammonia gas in the exhaustion, angle valve closed.
The active gas of ammonia gas access and adsorption is achieved by ammonia gas outlet pipe 5 of the. Can adopt the high-purity industrial ammonia bottle, in ventilation under the environment of natural well-ventilated, through the pressure reducing valve and drying system, in the 0.2 - 0.4 mpa pressure within the outlet of the slow pace of sufficient ammonia, sufficient ammonia time is 2 - 3 H-; sufficient ammonia takes the ammonia in the front and the rear of the weighing device, recognizing the ammonia into the net quality within a predetermined range, after the completion of sufficient ammonia, the closing of the valve of the whole system, to ensure that the leakage does not occur.
The structure in the northern cold area of the medium-sized truck use, electric mixed heated SSCR module produces the ammonia of the SCR device is mounted on the rear side of the post-processors. In -20 °C under cold start conditions, use of an ammonia gas pressure in the tank only 8 min, can meet the SCR system can be normally operated. By this device after the measuring installation, the exhaust flow rate is 1300 kg/h exhaust back pressure only when the rising 3 kPa.
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