CN2352957Y

CN2352957Y - Instrument for testing moisture content in smoke

Info

Publication number: CN2352957Y
Application number: CN 98248160
Authority: CN
Inventors: 马越超; 郭昆林
Original assignee: 李玉国
Priority date: 1998-11-16
Filing date: 1998-11-16
Publication date: 1999-12-08
Anticipated expiration: 2008-11-16

Abstract

The utility model discloses a measuring instrument for humidity ratio of smoke gas. The utility model is cylindrical and made of nylon material, the inner of the utility model is provided with a cavity, and the middle of the utility model is provided with a water jacket; one side of the upper part and the middle part of the cavity are respectively provided with a dry ball cavity and a wet ball cavity which utilize respectively a dry ball temperature sensor and a wet ball temperature sensor to measure smoke gas and stack gas preheating water temperature; the utility model utilizes a secondary instrument for computation to obtain the result of humidity ratio, and the utility model is also provided with a combined sampling tube and a simple watering device so as to ensure the accurate measurement of the humidity ratio of the smoke gas. The utility model is an ideal instrument for environmental monitoring departments for measuring the humidity ratio of the smoke gas and other relevant places.

Description

The humidity of flue gas measuring instrument

The utility model relates to a kind of humidity of flue gas measuring instrument, is mainly used in the measurement to the water capacity in the fire coal boiler fume, so that to the comprehensive monitoring of boiler smoke, belong to environmental technology field.

In the observation process to the discharged flue gas of coal-burning boiler, the measurement of humidity of flue gas is an important step of determining Gas Parameters.The measuring method of disclosed humidity of flue gas in the prior art, the most frequently used is gravimetric method, and this method needs to take balance to scene in implementation process, and its measuring accuracy is affected; Another kind of measuring method is a condensation method, and the method running program complexity can not in time provide testing result, and therefore, its application is subjected to certain limitation.

The purpose of this utility model is to provide a kind of humidity of flue gas measuring instrument, is used for the detection to the water capacity of fire coal boiler fume, can guarantee the accuracy of detected parameters.

The purpose of this utility model is to utilize the measuring principle of wet-and-dry bulb thermometer to realize, it uses the smoke filter filtering smoke, measure dried, wet-bulb temperature with platinum sensor, dry bulb, the wet bulb chamber of tested gas by being provided with the wet and dry bulb sensor, with sample gas preheating water temperature, the measured value of the wet-and-dry bulb thermometer in, the wet bulb chamber dried through contrasting through the conversion of secondary instrument, just obtains the moisture content values of flue gas.

What accompanying drawing 1 provided is structural representation of the present utility model.

Below in conjunction with accompanying drawing the utility model is described further.

The utility model that provides referring to accompanying drawing 1, comprise measuring instrument main body 1 in the humidity of flue gas measuring instrument structure, it be shaped as the cylinder bodily form, make of nylon material, the centre of main body 1 has cavity 2, be provided with a water jacket 3 of vertically placing in the cavity 2, the top end opening of this water jacket 3, its lower end places in the groove on the bottom of measuring instrument main body 1, and fastening, on the sidewall on measuring instrument main body 1 top, be provided with water filling port 16, it communicates with water jacket 3 in the cavity 2 by the waterflood path of opening in main body 1 17, the position of water filling port 16 is lower than the suitable for reading of water jacket 3, can guarantee that water can not overflow from water jacket.On the top of measuring instrument main body 1 loam cake 7 is arranged, there is a fixed head 6 below of loam cake 7, also make with nylon material, under this plate, lifting wet bulb platinum sensor 4, the lower end of this sensor is near the top end opening of water jacket 3, but do not contact, the top of cavity 2, be that residing position, wet bulb sensor top is called wet bulb chamber 5, the bottom of wet bulb sensor 4 is wound with water-absorbing material, and commonly used is the cotton yarn material, and the other end of cotton yarn is immersed in the water jacket 3 always, by the conduction of cotton yarn, the water temperature in the water jacket 3 can pass to wet bulb temperature sensor.Top one side of the cavity 2 in measuring instrument main body 1 has one to the cavity that extends out out, be called dry bulb chamber 15, on the sidewall of dry bulb chamber, have air intake opening (13), be provided with dry-bulb temperature sensor 14 in the dry bulb chamber 15, the tail end of sensor 14 is installed under the loam cake, dry-bulb temperature sensor 14 and wet bulb temperature sensor 4 all remove to connect secondary instrument through sensor socket 8, between dry bulb chamber 15 and wet bulb chamber 5, establish a gas baffle 9, purpose is that the flue gas that order is come in from air intake opening 13 has the viscous flow time in dry bulb chamber 15, can guarantee that the flue-gas temperature of dry-bulb temperature sensor 14 measurements is accurate as far as possible.Exhanst gas outlet 23 is arranged on the lower sides of measuring instrument main body 1, and it communicates with cavity 2 in the main body 1, and gas outlet 23 links to each other with aspiration pump.

The sampling pipe 18 of this measuring instrument is combination dismounting form, adopt between each single-unit pipe and be threaded, the connector of sampling pipe is rotatable form, in accompanying drawing 1, Connection Block 10 is equipped with at air intake opening 23 places at the top of measuring instrument main body 1 side, it and main body 1 immovable fitting, be flexible connection sleeve 11 in its outside, both are rotatably assorted, and be provided with 0 shape O-ring seal 12 at the two, air tight to guarantee air intake opening, the top that flexibly connects sleeve 11 seals, and downside has connector to be threaded with combined type sampling pipe 18.Combined type sampling pipe 18 other ends and the air-intake filter 19 of this measuring instrument join, and air-intake filter 19 is a stainless steel material, and inside is filled with glass fibre cotton, and 20 is screen pack among Fig. 1, and 21 is filter connector.

Principle of work of the present utility model is as follows: flue gas is under the aspiration pump effect, after the smoke filter filtering smoke, enter the measuring instrument main body through the sampling pipe air intake opening again, through entering the wet bulb chamber again behind the dry bulb platinum resistance temperature sensor, directly blow over the outer cotton yarn of wet bulb platinum resistance temperature sensor, downward along the wet bulb chamber, to the water preheat in the water jacket, flue gas is evacuated to aspiration pump and discharges through the gas outlet.After waiting to start shooting 3-5 minute, after the temperature of wet and dry bulb temperature sensor and the flue-gas temperature balance, measure resistance value dried, wet bulb temperature sensor, convert temperature to, draw corresponding moisture content values as calculated and show by supporting secondary instrument.

The obtained technological progress of the utility model is:

1, main body is nylon material, and its thermal conductivity is low, be convenient to the insulation, can keep flue gas pass through dry bulb, The virtual condition of wet bulb. 2, measure use P_t100 platinum sensors, good linearity, to lead resistance, The requirement of contact resistance is lower than thermocouple, has guaranteed the degree of accuracy and the reliability measured; 3, flue gas warp Water jacket is indirectly to water preheat, and what can guarantee that wet bulb sensor measures is evaporating temperature under the flue-gas temperature, disappears Except the water temperature impact to measuring on the low side; 4, wet bulb temperature sensor is fixed on the nylon sheet, just In the disassembling, assembling and replacing gauze, draw lead; 5, sampling pipe is combining form, and easy accessibility is easy to carry, Sampling pipe is connected with main body is movable, is conducive to execute-in-place.

Water capacity measuring instrument of the present utility model is suitable for the measurement of other relevant place water capacity equally.

Claims

1, a kind of humidity of flue gas measuring instrument, comprise main body (1) in the structure, dry bulb sensor (14), wet bulb sensor (4), sampling pipe (18), it is characterized in that: main body (1) is cylindrical shape, nylon material, the centre has cavity (2), be provided with a vertical water jacket (3) in the cavity (2), its top end opening, the bottom (22) of lower end and main body (1) is fixing, on the upper portion side wall of main body (1), be provided with water filling port (16), it communicates with water jacket (3) by the waterflood path of opening in main body (1) (17), the position of water filling port (16) is lower than the suitable for reading of water jacket (3), there is loam cake (7) on the top of main body (1), there is a fixed head (6) below of loam cake, be lifted with wet bulb sensor (4) under the fixed head (6), it is near the top end opening of water jacket (3), the bottom of wet bulb sensor (4) is wound with water-absorbing material, the other end of this water-absorbing material is immersed in the water jacket (3), top one side of the cavity (2) in main body (1) has one to the dry bulb chamber (15) that extends out out, communicate with air intake opening (13), be provided with dry-bulb temperature sensor (14) in the dry bulb chamber (15), be provided with gas baffle (9) between dry bulb chamber (15) and wet bulb chamber (5), on the lower wall of main body (1), be provided with gas outlet (23), it with main body (1) in cavity (2) communicate, sampling pipe (18) one ends are communicated with air intake opening (13) by web member (11), and its other end and air-intake filter (19) join.

2, by the described humidity of flue gas measuring instrument of claim 1, it is characterized in that the air intake opening (13) of main body (1) locates to be equipped with Connection Block (10), it is rotatably assorted with flexibly connecting cover (11), and the two has 0 shape O-ring seal (12).

3,, it is characterized in that sampling pipe (18) is more piece, dismounting form, adopts between every single-unit to be threaded by the described humidity of flue gas measuring instrument of claim 1.

4, by the described humidity of flue gas measuring instrument of claim 1, it is characterized in that air-intake filter (19) is a stainless steel material, inside is filled with glass fibre cotton.