High temperature probe
AssigneeThe United States of America as represented by the United States Department of Energy
InventorRaymond A. Swan
Life of this patent
Estimating the term…
Abstract
A high temperature probe for sampling, for example, smokestack fumes, and is able to withstand temperatures of 3000.degree. F. The probe is constructed so as to prevent leakage via the seal by placing the seal inside the water jacket whereby the seal is not exposed to high temperature, which destroys the seal. The sample inlet of the probe is also provided with cooling fins about the area of the seal to provide additional cooling to prevent the seal from being destroyed. Also, a heated jacket is provided for maintaining the temperature of the gas being tested as it passes through the probe. The probe includes pressure sensing means for determining the flow velocity of an efficient being sampled. In addition, thermocouples are located in various places on the probe to monitor the temperature of the gas passing there through.
Claims20
A high temperature probe for sampling a fluid such as effluents, emissions, etc., comprising:
- a casing constituting a cooling jacket;
- a sample inlet assembly mounted in said casing and including a hollow inlet member therein and cooling fins located at one end and on the exterior thereof, said inlet assembly being adapted to be connected to an inlet nozzle located at an end opposite from said cooling fins and positioned to receive a fluid to be sampled;
- a sample heating assembly including said hollow member;
- a seal assembly positioned within said sample inlet assembly, around said hollow inlet member, and located within said cooling fins of said sample inlet assembly so as to be in spaced relation with said inlet nozzle;
- means for directing coolant through said casing and around said cooling fins;
- means extending through said casing for connection to means determining pressure differential of fluid being sampled;
- and
- a plurality of thermocouple means located in at least various areas within said casing for determining temperature.
In a system for sampling/measuring fluids passing through a smoke stack or the like having a probe means for sampling the fluid, means for determining the fluid pressure, means for determining the fluid temperature, and means for maintaining the temperature of the sampled fluid as it passes through the probe means, the improvement comprising:
- a cooled seal assembly positioned within said probe means and located a distance from any external section of said probe means so as to prevent degradation of said seal assembly due to heating thereby by fluid being sampled and prevent leakage of fluid sampled.
A fluid sampling probe capable of withstanding fluid temperatures to about 3000.degree. F. and adapted for at least partial insertion into a flow of fluid to be sampled, said probe comprising:
- a casing having a body section and end sections, said casing functioning as a cooling jacket, each of said casing end sections being provided with openings therein;
- a Pitot tube assembly having tubes extending through certain of said openings in said casing end sections, said tubes adapted to be connected to an associated manometer;
- a temperature sensing means extending through certain of said openings in said casing end sections for determining temperature of fluid flowing past said casing;
- a sample inlet assembly positioned within said casing and having a hollow tube mounted in an opening of one of said casing end sections for directing fluid into said sample inlet assembly, said inlet assembly including a housing positioned around said hollow tube and provided at one end with a plurality of cooling fins;
- a sample heater assembly extending through an opening of another of said casing end sections for maintaining a temperature of a sampled fluid passing through said probe, said heater assembly including a section of said hollow tube which extends through an opening in said one end of said housing of said sample inlet assembly;
- a seal assembly positioned within said housing of said sample inlet assembly and adjacent said one end of said housing and around said hollow tube;
- means for directing liquid coolant through said casing and about said cooling fins for cooling at least said seal assembly;
- temperature sensing means positioned adjacent said cooling fins for determining the temperature adjacent said seal assembly;
- and
- temperature sensing means positioned along said hollow tube section of said sample heater assembly for determining the temperature of a sampled fluid flowing there through;
- whereby said seal assembly is located within said casing in a spaced relation with said one casing end section and is cooled by coolant flowing through said casing, thus preventing degradation of said seal assembly by high temperature of fluid flowing past said probe.
Dependencies are inferred from the claim text.