Device and method for the continuous measurement of the ammonia concentration in gases in the ppm range
First Claim
1. A device for the continuous measurement of the ammonia concentration in gases, comprising:
- a columnar absorption vessel with an outlet piece located at a bottom of said absorption vessel;
an overflow pipe located laterally above the bottom of said absorption vessel;
an infeed pipe for admitting a gas to be measured into the absorption vessel above the bottom;
a sieve bottom fastened in the vessel above the infeed pipe;
said infeed pipe including a rinse line;
said column definding an area for receiving a packing material, the area located above the sieve bottom and essentially occupies the entire absorption vessel;
a cooling part which extends from the absorption vessel, said cooling part including a cooling zone, and a gas collection chamber located over said cooling zone;
a connection piece for the supplying a liquid absorption agent into said gas collection chamber;
an inner pipe which runs through said cooling zone and extends into the gas collection chamber, said inner pipe being tightly connected to a jacket of the cooling part.
1 Assignment
0 Petitions
Accused Products
Abstract
A device for the continuous measurement of the ammonia concentration in gases in the ppm range includes a columnar absorption vessel (1) with a hemispherical bottom (4). The bottom of the column includes an overflow (3) and an outlet (5). The gas introduction pipe (7,8) empties above the bottom (4) and below a sieve bottom (6) arranged in the column (1). A packing material (10) rests on the sieve bottom (6), which packing (10) essentially fills the absorption column (1). A cooling part (11) extends from the absorption column (1). The cooling part (11) includes a cooling zone (15) and a gas collection space (16) above it with a closable connection piece (13). A pipe (14), which may include a serrated crown on each end, runs from the gas collecting space (16) downward in a cooled manner to the packing 10. The liquid absorption agent is introduced through a lateral connection piece (18) into the gas collection space (16). For the measurement of ammonia concentration, a certain volume flow of the gas to be measured is washed in a countercurrent flow with the absorption agent, and the NH3 content is determined in a part of the ammonia containing absorption agent. The volume flow rate of the absorption agent and of the gas from which NH3 has been removed is measured (the latter being dried), and the ammonia concentration is thereby calculated.
17 Citations
21 Claims
-
1. A device for the continuous measurement of the ammonia concentration in gases, comprising:
- a columnar absorption vessel with an outlet piece located at a bottom of said absorption vessel;
an overflow pipe located laterally above the bottom of said absorption vessel;
an infeed pipe for admitting a gas to be measured into the absorption vessel above the bottom;
a sieve bottom fastened in the vessel above the infeed pipe;
said infeed pipe including a rinse line;
said column definding an area for receiving a packing material, the area located above the sieve bottom and essentially occupies the entire absorption vessel;
a cooling part which extends from the absorption vessel, said cooling part including a cooling zone, and a gas collection chamber located over said cooling zone;
a connection piece for the supplying a liquid absorption agent into said gas collection chamber;
an inner pipe which runs through said cooling zone and extends into the gas collection chamber, said inner pipe being tightly connected to a jacket of the cooling part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- a columnar absorption vessel with an outlet piece located at a bottom of said absorption vessel;
-
14. A device for the continuous measurement of the ammonia concentration in gases, comprising:
- a columnar absorption vessel having a hemispherical shaped bottom;
an outlet piece located at the bottom;
an overflow pipe located laterally above the bottom;
an infeed pipe for admitting a gas to be measured into the absorption vessel above the bottom and below a sieve bottom fastened in the absorption vessel;
said infeed pipe being L-shaped and centrally located in the vessel and said infeed pipe further including a rinse line;
said column definding an area for receiving a packing material, the area located above the sieve bottom and essentially occupies the entire absorption vessel;
a cooling part which extends from the absorption vessel, said cooling part including a cooling zone, and a gas collection chamber located over said cooling zone;
a closable suction piece extending from said gas collection chamber;
a connection piece for supplying a liquid absorption agent into said gas collection chamber;
an inner pipe which includes a serrated crown on at least one of its ends, said inner pipe extending through the cooling zone, with one end extending into the gas collection chamber and the other end being tightly connected to a jacket of the cooling part below the cooling zone.
- a columnar absorption vessel having a hemispherical shaped bottom;
-
15. A method for the continuous measurement of the ammonia concentration in gases, comprising:
- contacting a volume flow of a gas to be measurement with a countercurrent flow of a liquid absorption agent;
quantitatively measuring the ammonia concentration of at least a part of the absorption agent in an ammonia analyzer, after it has contacted the gas to be measured;
measuring the volume flow rate of the absorption agent;
measuring the volume flow rate of the gas freed of ammonia; and
calculating the NH3 concentration according to the formula;
##EQU3## in which;
CNH3G =concentration of NH3 in the gas (ppm relative to dry);CNH3L =concentration of NH3 in the absorption solution (g/dm3); VAbs =volume flow of the flowing absorption solution (dm3 /h); VG =volume flow of the gas to be analyzed, drawn by suction through the absorption vessel (dm3 /h in a normal state relative to dry); VM,NH3 =molar volume of gaseous ammonia state (dm3 /mole in a normal state); and MNH3 =molar mass of ammonia (g/mole). - View Dependent Claims (16, 17, 18, 19, 20, 21)
- contacting a volume flow of a gas to be measurement with a countercurrent flow of a liquid absorption agent;
Specification