CN2600815Y

CN2600815Y - Combustion chamber for gas heating effect instrument

Info

Publication number: CN2600815Y
Application number: CN 02253502
Authority: CN
Inventors: 叶俊林; 胡海龙; 文端中; 有祥武
Original assignee: KEHAI LONGHUA INDUSTRY AUTOMATION INSTRUMENT Co Ltd BEIJING
Current assignee: KEHAI LONGHUA INDUSTRY AUTOMATION INSTRUMENT Co Ltd BEIJING
Priority date: 2002-09-05
Filing date: 2002-09-05
Publication date: 2004-01-21
Anticipated expiration: 2012-09-05

Abstract

The utility model discloses a combustion chamber for gas calorimeters, technically characterized in that: combustible gas of stable universal pressure is used; the method of primary and secondary airflow adjustment is applied to realize complete combustion of the combustible gas; a combustion nozzle provided with heating wires is used to heat the fuel gas intake of the combustion chamber so that combustible gas of low calorific value can easily be lighted; an adjustable automatic ignition device is used for automatic and continuous ignition; heat insulation measures are taken to reduce heat loss during transmission. With help of above technical proposal, the combustion chamber for gas calorimeters is capable of automatic and safe ignition, low heat losses, easy ignition of fuel gas with a low calorific value, and stable and safe combustion process etc, and can be applied to gas calorimeters of various kinds.

Description

The firing chamber that fuel gas caloric value determination apparatus uses

Technical field

The utility model relates to combustible analyzer table technical field, particularly measures the burner that the inflammable gas calorific value uses.

Background technology

The firing chamber of fuel gas caloric value determination apparatus use at present is mainly by burning chamber shell, the combustion gas thermal bulb, the air thermal bulb, gas pipeline, air duct, the combination gas pipeline, gas control valve and lighter constitute, air enters air duct by air in, opening gas control valve makes combustion gas enter gas pipeline, make two kinds of gases enter the combination gas pipeline by a certain percentage by regulating gas quantity, enter then in the burning housing, the portfire that is positioned at combination gas pipeline upper end is lighted combination gas, survey fuel gas temperature by the combustion gas thermal bulb that is positioned at the upper end, firing chamber, measure air themperature by the air thermal bulb that is positioned at the air duct upper end, fuel gases calorific value becomes the mathematical relation of rule with the temperature difference of above-mentioned two temperature, can directly draw the fuel gases calorific value number by microcomputer.

The firing chamber that fuel gas caloric value determination apparatus uses should make combustion gas safety ignition, smooth combustion, loss heat in the firing chamber few.There is following defective the firing chamber of fuel gas caloric value determination apparatus use at present:

1, adopt the measure that feeds enough air capacities, regulates the combustible gas scale of construction, make air and combustion gas reach needed combustion ratio, this method lacks safe reliability;

2, do not have constant heating facility in the firing chamber, can not make the ignition at normal temperatures of net heat value (about 3MJ) inflammable gas, can't test fuel gas with low heat value;

3, do not have igniting facility automatically, can not realize safety, automatic, constant ignition, change the lighter inconvenience;

4, thermal losses is big.

The utility model content

The purpose of this utility model provides the firing chamber that a kind of fuel gas caloric value determination apparatus uses, and this firing chamber has automatic safe igniting, advantages such as thermal losses is few, fuel gas with low heat value is easily lighted, combustion process safety and stability.

For achieving the above object, the technical scheme that the utility model is taked is: the firing chamber that a kind of fuel gas caloric value determination apparatus uses, mainly by air intake, fuel gas inlet, the combination gas inlet, the burning inwall, inspection section, the combustion gas thermal bulb, the thermometric fixed leg, the air thermal bulb, gland nut, lighter, air control valve, air duct, the burner seat, threaded block, mat insulation, insulating end, the firing chamber supporting seat, the regulating the qi flowing in the channels plug pin, burner, the stove silk, the burner overcoat, fixed cover, combustion outer case, airflow-distribution board, the positioning nut, platinum wire, fixed cover web joint and ring flange constitute; The lower end of described burner seat and combination gas inlet link together, its upper end is connected the burner jacket bottom, the center pit of burner seat and burner communicates, twine the stove silk around the burner, the burner overcoat is encapsulated in the periphery of stove silk, described burning inwall is arranged on the top of burner, the lower end of burning inwall is welded on the top of firing chamber supporting seat, the bottom of this firing chamber supporting seat is welded on the fixed cover lower end, have a plurality of circular holes on the horizontal circle annular cylinder of described firing chamber supporting seat, be mounted with the regulating the qi flowing in the channels plug pin in the circular hole, described fixed cover is placed in the periphery of burner overcoat, its upper and lower end face is equipped with mat insulation respectively, and fixedly connected with the fixed cover web joint respectively, between described fixed cover web joint and described burner seat, threaded block is housed, be fixed on the outside of burner seat with screw thread, upper surface at described threaded block is equipped with insulator, on the sidewall of described fixed cover, have circular hole, one end of air duct is inserted in the hole, fix with gland nut, the other end of air duct is welded on the sidewall of air thermal bulb, draws an other air duct on this air duct, the latter and blast tube converge, and on this air duct of drawing air control valve are installed.In the upper end of described air thermal bulb the thermometric fixed leg is installed, described combustion outer case is placed in the periphery of burning inwall, its lower end and fixed cover web joint weld together, its upper end and ring flange weld together, clamp an annular mat insulation in the middle of the ring flange, position up and down between described combustion outer case and burning inwall is respectively equipped with airflow-distribution board, one side of described burning inwall is provided with inspection section, the opposite side of burning inwall is provided with lighter near the upper surface of burner, platinum wire is equipped with on the top of this lighter, at lighter and combustion outer case connecting portion the positioning nut is housed, the lower end of described combustion gas thermal bulb is connected with combustion outer case, and the thermometric fixed leg is equipped with in the upper surface of combustion gas thermal bulb.

Described burner is the cylinder of ceramic making, and the cylindrical shell upper end cover has uniform circular hole, and there is spiral groove in the cylindrical shell outside, and the stove silk is installed in the groove.Around the stove silk, be packaged with the filler of anti-oxidation.

Described burner overcoat is the cylinder that stainless steel is made, and the circular hole identical with the burner external diameter arranged at the cylinder bottom.

Described burner seat is two cylinders that are connected as a single entity that stainless steel is made, the internal diameter of top cylinder body is identical with the external diameter of burner, the internal diameter of bottom cylinder is identical with the internal diameter of combination gas inlet, on this bottom cylinder outer wall screw thread is arranged, and two cylinder connecting portions are circular platform.

Described threaded block is the boss shape cylinder that stainless steel is made, its center bore is identical with the bottom cylinder external diameter of burner seat, and there is screw thread to cooperatively interact, have a plurality of circular holes in centre, cylinder upper surface, this circular hole communicates with the toroidal cavity that is positioned at centre, cylinder lower surface, and insulator is housed in the circular hole.

Described firing chamber supporting seat is the boss shape cylinder that metal is made, the external diameter of top cylinder is identical with the internal diameter of burning inwall, the external diameter of bottom cylinder is identical with the bottom diameter of fixed cover, on the platform of the annular of two cylinder connecting portions, have a plurality of threaded holes, screw in the regulating the qi flowing in the channels plug pin in the circular hole.

Described inspection section is the cylinder that corrosion resistant plate is made, and the one end is a tight fit on the sidewall of burning inwall and welds together with combustion outer case, and the other end is equipped with the quartz glass view window.

Described lighter is the cylinder that stainless steel is made, and its front end face is positioned near the loam cake of burner, and the platinum wire of igniting usefulness is housed on the end face, and the position of passing combustion outer case at this lighter is provided with the positioning nut.

The firing chamber that fuel gas caloric value determination apparatus described in the utility model uses, its principle of work is:

Inflammable gas is regulated the back through constant voltage and is entered in the pipeline by fuel gas inlet 4, air enters the air thermal bulb by air intake 1, opening air control valve 2 makes air enter air duct 3a, here be called primary air, primary air and combustion gas are entered the inner chamber of burner 12 by combination gas inlet 5 after mixing, the stove silk 13 of burner periphery is heating always, and there is the filler of anti-oxidation to encapsulate, make stove silk heating-up temperature constant, can realize the igniting of fuel gas with low heat value, near the platinum wire 26 that is positioned at the burner loam cake is controlled at the state of lighting by computer, when the circular hole of combustion gas by the burner loam cake enters the inner chamber of burning inwall 16, lighted immediately, form flame, extinguished by computer control platinum wire this moment, during use, can be by regulating positioning nut 25, lighter 24 is moved forward or backward, adjust to the optimum igniting position, auxiliary air is entered in the interlayer of combustion outer case 17 and fixed cover 15 by air duct 3b simultaneously, enter the flow of firing chamber inner chamber by the quantity control air that pulls out regulating the qi flowing in the channels plug pin 11, thereby the ratio of control air and combustion gas, combustion gas can fully be burnt in the firing chamber, by the situation that the view window of inspection section 19 end faces can be observed flame combustion, in addition, auxiliary air can pass through two-layer airflow-distribution board 18, enter burning inwall 16 upper ends by the interlayer outside the firing chamber equably, reduced the loss of heat transferred in the firing chamber, in addition, because on top, firing chamber, bottom and burner bottom are respectively equipped with mat insulation 8, make firing chamber heat transmission few, thereby loss is few.Combustion gas is fully burning in the firing chamber, keep heat the highest, thermometric fixed leg 21a by combustion gas thermal bulb 20 upper surfaces measures fuel gas temperature, thermometric fixed leg 21b by air thermal bulb 22 upper surfaces measures air themperature again, fuel gases calorific value becomes the rule mathematical relation with the temperature difference of above-mentioned two temperature, can directly draw fuel gases calorific value numerical value by microcomputer.

From above principle of work as can be seen, the firing chamber that the fuel gas caloric value determination apparatus that the utility model provides uses is compared with the firing chamber that present fuel gas caloric value determination apparatus uses, and following beneficial effect is arranged:

1, adopt the fixing inflammable gas of feeding constant voltage, regulate the flow of primary air and auxiliary air, inflammable gas is fully burnt in the firing chamber, this method is safe and reliable;

2, adopt the burner that has the stove silk to make fuel gas inlet position, combusting room device lower end be heated to uniform temperature, the filler that is provided with anti-oxidation around the stove silk encapsulates burner, make and keep the heat maximum in the firing chamber, thermal loss is little, simultaneously because the heat effect of burner, make net heat value (about 3MJ) but the inflammable gas continuous burning, thereby finish online detection calorific value;

3, automatic ignitor is arranged, can realize safety, automatic, constant ignition, it is very convenient to change lighter;

4, owing to adopted three layers of mat insulation, make the heat transferred loss little, also because the interlayer of auxiliary air around being full of, played the compensating action of heat the firing chamber outside, also make heat transferred loss minimizing simultaneously.

Description of drawings

The chamber structure synoptic diagram that Fig. 1 uses for fuel gas caloric value determination apparatus.

Embodiment

As shown in Figure 1, the firing chamber of fuel gas caloric value determination apparatus use is made up of burner heating arrangement, gas combustion apparatus, temperature measuring equipment and gas passage four parts.The burner heating arrangement comprises burner seat 6, threaded block 7, mat insulation 8, insulator 9, burner 12, stove silk 13, fixed cover 15 and fixed cover web joint 27, the cylinder that burner 12 is made for pottery, loam cake is the ceramic plectane that has a plurality of circular holes, cylinder side wall has the groove of screw-type, place the stove silk of making by nickel filament 13 in the groove, the stove silk is with outward by aluminium oxide, the filler that cement and glass cement are made is with burner 12 encapsulation, to prevent external oxidation, filler is with the cylindrical shape burner overcoat of being made by corrosion resistant plate 14 outward and is enclosed within burner 12 outsides, the lower end of burner overcoat 14 and burner 12 link together, the connector of two cylinders that burner seat 6 is made for stainless steel, the top cylinder end face is supported on the lower surface of burner overcoat 14, this cylindrical sleeve is in burner 12 outsides, the base part seat of burner 12 drops in the groove of two cylinder connecting portions of burner seat 6, the bottom drum diameter that constitutes burner seat 6 is less than the top cylinder diameter, the boss that connecting portion forms is settled heat insulating washer 8a, link together at the bottom of burner seat 6 cylinder end face and mixed gas inlet 5, on this cylinder outer wall screw thread is arranged, in order to connecting thread seat 7, the boss shape cylinder that threaded block 7 is made for stainless steel, barrel bore has screw thread to be connected with burner seat 6, the end face of cylinder compresses heat insulating washer 8a, the lug boss position of threaded block is stuck on the inner tube wall and bottom surface of metal annular web joint 27a, the centre, upper surface of described threaded block 7 has 4 circular holes, the lower end of circular hole communicates with the toroidal cavity in centre, threaded block 7 lower surface, insulator 9 is housed in the circular hole, make stove silk thread 13 by passing through here, fixed cover 15 is metal cylindrical shell, the center is circular, the outside is square, internal diameter is identical with the internal diameter of combustion outer case 17, the inner core bottom is provided with circular groove, be connected with firing chamber supporting seat 10, the bottom surface of described fixed cover 15 and end face are placed on

heat insulating washer

8a and 8b respectively, and fixedly connected with 27b with fixed cover web joint 27a respectively; Gas combustion apparatus comprises burning inwall 16, combustion outer case 17, airflow-distribution board 18, inspection section 19, lighter 24, positioning nut 25, platinum wire 26, firing chamber supporting seat 10, regulating the qi flowing in the channels plug pin 11, heat insulating washer 8c and ring flange 28, the cylinder that described burning inwall 16 is made for corrosion resistant plate, cover on the outside of burner overcoat 14, one cavity is arranged between the two, the lower end, firing chamber is located on the firing chamber supporting seat 10, the boss shape cylinder that described firing chamber supporting seat 10 is made for the A3 steel, boss bottom cylinder is placed in the circular groove of fixed cover 15 inner core bottoms, boss top cylinder body inserts the inner tube wall of burning inwall 16, have 50 uniform circular holes on the annular platform of two cylinder connecting portions, is furnished with regulating the qi flowing in the channels plug pin 11 in the circular hole, outside at burning inwall 16 is provided with the combustion outer case 17 that corrosion resistant plate is made, its lower end and fixed cover web joint 27b weld together, the upper end welds together with ring flange 28, clamp an annular heat insulating washer 8c in the middle of the ring flange, in the cavity that between combustion outer case 17 and burning inwall 16, constitutes, thereon, following position is welded an airflow-distribution board 18a and 18b respectively, this airflow-distribution board is the annular plate of being made by the A3 steel plate, have a plurality of uniform circular holes on the plate, side at burning inwall 16, near burner 12 loam cake positions lighter 24 is installed, this lighter 24 passes combustion outer case 17 and burning inwall 16, be fixed on the combustion outer case 17 by positioning nut 25, the platinum wire 26 of igniting usefulness is equipped with on the lighter top, lighting and extinguish by computer control platinum wire 26, positioning nut 25 can point of adjustment firearm 24 puts in the position in burning inwall 16 chambeies, so that ignited flammable gas, opposite side at burning inwall 16 is provided with inspection section 19, so that the flame combustion situation in the observation burning inwall 16, inspection section is the cylinder that stainless steel is made, one end is welded on the wall of burning inwall 16, and the other end is equipped with windowpane; Temperature measuring equipment comprises coal gas thermal bulb 20, air thermal bulb 22 and thermometric fixed leg 21, coal gas thermal bulb and air thermal bulb are the cylinder that corrosion resistant plate is made, the lower end of coal gas thermal bulb 20 and combustion outer case 17 link together, thermometric fixed leg 21a is equipped with in the upper end, the lower end of air thermal bulb 22 is connected with air intake 1, and thermometric fixed leg 21b is equipped with in its upper end; Gas passage comprises gas entry 4, air intake 1, mixed gas inlet 5, primary air passage 3a, secondary-air passage 3b and air control valve 2, also has the gas passage that external cavity forms in the firing chamber in addition, gas entry 4 be arranged on mixed gas inlet 5 below, combination gas inlet 5 is arranged on the central passage inlet of burner seat 6, air intake 1 is arranged on the lower end of air thermal bulb 22, on the sidewall of air thermal bulb 22, have circular hole, weld together with the end of secondary-air passage 3b, the hole of opening on the other end of secondary-air passage 3b and fixed cover 15 sidewalls links together, and it is fixing with gland nut 23, downside wall at secondary-air passage 3b has circular hole, in order to connect primary air passage 3a, the other end of this passage communicates with the pipeline of gas entry 4, on primary air passage 3a air control valve 2 is installed.

The course of work of above-mentioned firing chamber is summarized as follows:

Air enters air thermal bulb 22 by air intake 1, open air control valve, make air enter mixed gas inlet 5 by primary air pipeline 3a, the variable valve that turns on the gas-fire makes the coal gas with constant pressure enter mixed gas inlet 5 by inlet 4, mixed gas enters in the burner 12, heat owing to the stove silk in the burner always, keep uniform temperature, mixed gas lights mixed gas by the platinum wire of lighting 26 after heating up by the burner lid, before feeding mixed gas, with 25 in 50 the regulating the qi flowing in the channels plug pins plug pin holes of filling in uniform way on the firing chamber supporting seat 10, portion of air upwards flows through airflow-distribution board 18 and flows to burning inwall 16 tops, another part air enters between combustion outer case 17 and the burner overcoat 14 in the cavity that constitutes by regulating the qi flowing in the channels plug pin hole, upwards flow in the firing chamber combustion-supportingly, observes flame combustion states by inspection section 19, in time regulate the size of air mass flow, combustion gas is fully burnt, measure fuel gas temperature and air themperature, show fuel gases calorific value by computer.

Claims

1, the firing chamber that a kind of fuel gas caloric value determination apparatus uses, comprise air intake (1), fuel gas inlet (4), combination gas inlet (5), burning inwall (16), inspection section (19), combustion gas thermal bulb (20), thermometric fixed leg (21), air thermal bulb (22), gland nut (23), lighter (24) is characterized in that: the firing chamber that this fuel gas caloric value determination apparatus uses also comprises primary air variable valve (2), air duct (3), burner seat (6), threaded block (7), mat insulation (8), insulator (9), firing chamber supporting seat (10), regulating the qi flowing in the channels plug pin (11), burner (12), stove silk (13), burner overcoat (14), fixed cover (15), combustion outer case (17), airflow-distribution board (18), positioning nut (25), platinum wire (26), fixed cover web joint (27) and ring flange (28); The lower end of described burner seat (6) and combination gas inlet (5) link together, its upper end is connected burner overcoat (14) bottom, the center pit of burner seat (6) and burner (12) communicates, twine stove silk (13) around the burner (12), burner overcoat (14) is encapsulated in the periphery of stove silk (13), described burning inwall (16) is arranged on the top of burner (12), the lower end of burning inwall (16) is welded on the top of firing chamber supporting seat (10), the bottom of this firing chamber supporting seat (10) is welded on fixed cover (15) lower end, have a plurality of circular holes on the horizontal circle annular cylinder of described firing chamber supporting seat (10), be mounted with plug vent plug nail (11) in the circular hole, described fixed cover (15) is placed in the periphery of burner overcoat (14), its upper and lower end face is equipped with mat insulation (8b) and (8a) respectively, and fixedly connected with (27a) with fixed cover web joint (27b) respectively, between described fixed cover web joint (27a) and described burner seat (6), threaded block (7) is housed, be fixed on the outside of burner seat (6) with screw thread, in the upper surface of described threaded block (7) insulator (9) is installed, on the sidewall of described fixed cover (15), have circular hole, one end of air duct (3b) is inserted in the hole, fixing with gland nut (23), the other end of air duct (3b) is welded on the sidewall of air thermal bulb (22), one end of air duct (3a) is connected with air duct (3b), the other end is connected with blast tube (4), air control valve (2) is installed on air duct (3a), in the upper end of described air thermal bulb (22) thermometric fixed leg (21b) is installed, described combustion outer case (17) is placed in the periphery of burning inwall (16), its lower end and fixed cover web joint (27b) weld together, its upper end and ring flange (28) weld together, clamp an annular mat insulation (8c) in the middle of the ring flange, position up and down between described combustion outer case (17) and burning inwall (16) is respectively equipped with airflow-distribution board (18a) and (18b), one side of described burning inwall (16) is provided with inspection section (19), the opposite side of burning inwall (16) is provided with lighter (24) near the upper surface of burner (12), platinum wire (26) is equipped with on the top of this lighter (24), at lighter (24) and combustion outer case (17) connecting portion positioning nut (25) is housed, the lower end of described combustion gas thermal bulb (20) is connected with combustion outer case (17), and thermometric fixed leg (21a) is equipped with in the upper surface of combustion gas thermal bulb (20).

2, the firing chamber of using according to the described fuel gas caloric value determination apparatus of claim 1, it is characterized in that: described burner (12) is the cylinder of ceramic making, and the cylindrical shell upper end cover has uniform circular hole, and there is spiral groove in the cylindrical shell outside, and stove silk (13) is installed in the groove.Around stove silk (13), be packaged with the filler of anti-oxidation.

3, the firing chamber of using according to the described fuel gas caloric value determination apparatus of claim 1 is characterized in that: the cylinder that described burner overcoat (14) is made for stainless steel, the cylinder bottom has and the identical circular hole of burner (12) external diameter.

4, the firing chamber of using according to the described fuel gas caloric value determination apparatus of claim 1, it is characterized in that: two cylinders that are connected as a single entity that described burner seat (6) is made for stainless steel, the internal diameter of top cylinder body is identical with the external diameter of burner (12), the internal diameter of bottom cylinder is identical with the internal diameter of combination gas inlet (5), on this bottom cylinder outer wall screw thread is arranged, two cylinder connecting portions are circular platform.

5, the firing chamber of using according to the described fuel gas caloric value determination apparatus of claim 1, it is characterized in that: the boss shape cylinder that described threaded block (7) is made for stainless steel, its center bore is identical with the bottom cylinder external diameter of burner seat (6), and there is screw thread to cooperatively interact, have a plurality of circular holes in centre, cylinder upper surface, this circular hole communicates with the toroidal cavity that is positioned at centre, cylinder lower surface, and insulator (9) is housed in the circular hole.

6, the firing chamber of using according to the described fuel gas caloric value determination apparatus of claim 1, it is characterized in that: the boss shape cylinder that described firing chamber supporting seat (10) is made for metal, the external diameter of top cylinder is identical with the internal diameter of burning inwall (16), the external diameter of bottom cylinder is identical with the bottom diameter of fixed cover (15), on the platform of the annular of two cylinder connecting portions, have a plurality of threaded holes, screw in regulating the qi flowing in the channels plug pin (11) in the circular hole.

7, the firing chamber of using according to the described fuel gas caloric value determination apparatus of claim 1, it is characterized in that: the cylinder that described inspection section (19) is made for corrosion resistant plate, the one end be a tight fit in the burning inwall (16) sidewall on weld together with combustion outer case (17), the other end is equipped with the quartz glass view window.

8, the firing chamber of using according to the described fuel gas caloric value determination apparatus of claim 1, it is characterized in that: the cylinder that described lighter (24) is made for stainless steel, its front end face is positioned near the loam cake of burner (12), the platinum wire (26) of igniting usefulness is housed on the end face, and the position of passing combustion outer case (17) at this lighter (24) is provided with positioning nut (25).