CN2207389Y

CN2207389Y - Cocurrent flow gas producing unit

Info

Publication number: CN2207389Y
Application number: CN 94242677
Authority: CN
Inventors: 刘顺娣; 胡盛典
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-06
Filing date: 1994-10-06
Publication date: 1995-09-13
Anticipated expiration: 2004-10-06

Abstract

The utility model relates to a cocurrent flow gas producing unit, comprising a furnace body, a grate, and a water sealing ash tray. The cocurrent flow gas producing unit is characterized in that the upper part of the furnace body adopts a water jacket, and the lower part adopts fireproof material as a liner; the lower part of the furnace body adopts a cylindrical slag ring, and coal gas is simultaneously exhausted from an annular passage on the periphery of the bottom of the furnace body and a central passage on the center of the bottom of a hearth; the top of the furnace adopts a detachable sealing furnace cover; gasifying agent which enters the furnace adopts the mixing agent of oxygen-enriched air made by a PSA device and water vapor; oxygen-enriched concentration is realized by adjusting air supply. The utility model has the advantages that the cocurrent flow gas producing unit prevents slag from hanging and knotting to enable furnace conditions to stably and normally do gasification reaction for a long term; compared with the existing similar device, the gas caloricity produced by the cocurrent flow gas producing unit is raised more than 30%.

Description

Cocurrent flow gas producing unit

The utility model belongs to by solid carbon-contg material production producer inflammable gas field, is specifically related to a kind of generating unit of producing coal gas with bunker coal.

In the prior art, Chinese patent CN2127710Y discloses a kind of counter-burning type gazogene.Its primary structure is: whole upper of furnace body (redox layer) adopts refractory materials to do liner, furnace roof adopts movable non-tight bell, the taper structure of slagging tap is adopted in the body of heater bottom, the saturated air that regulates in advance (mixture of air and steam) enters upper space from body of heater top inlet tube, extracts out by the circular channel that is located at the body of heater lower periphery through the coal gas of gasification reaction.Although this device has many advantages, as the high temperature oxide layer burning in body of heater of the tar class objectionable impurities in the bunker coal, thereby self purify in the realization stove etc., but still have many deficiencies in actual use: 1. since the furnace temperature of upper furnace high-temperature zone at 900～1200 ℃, very easily produce the bonding wall built-up between high temperature coal and the furnace lining refractory brick, form ring-type dross district, seriously hinder the carrying out of gasification reaction.2. because furnace roof adopts the non-tight bell, under vacuum pump aspirated, the external air of saturated air and furnace roof entered the gasification layer simultaneously, and the relative content of steam in the vaporized chemical is reduced, and gasification temperature reduces, and caused the interior gasification reaction of stove out of control, formed the slagging scorification phenomenon.3. owing to extract out the circular channel of this device coal gas through being located at the body of heater lower periphery, according to the liquid motion rule, vaporized chemical is selected a line of least resistance motion in burner hearth, very easily cause burner hearth inner edge wind excessive, the air-flow short circuit, thereby destroyed the normal running route of vaporized chemical, worsened the gasification reaction in the stove.4. because the taper circle of slagging tap has been adopted in the body of heater bottom, furnace charge is hindered when moving downward, the place very easily forms ring-type blanking dead band near the furnace wall, thereby has influenced normally carrying out of the interior gasification reaction of stove.5. because this device provides air nitrogen content in the vaporized chemical up to 78%, cause institute's producing coal gas calorific value on the low side.

The purpose of this utility model provides a kind of cocurrent flow type gazogene that can keep long-term, stablize, normally carry out gasification reaction.

For reaching this purpose, the technical solution adopted in the utility model is: a kind of cocurrent flow type gazogene, the water seal ash-pan that comprises body of heater, fire grate and place the body of heater below, the burner hearth of body of heater is communicated with the water seal ash-pan, fire grate places the central authorities of lower furnace portion and connection place, upper of furnace body adopts the water jacket structure, and its underpart adopts refractory materials to do liner; The body of heater bottom is provided with outlet passageway.

For making the better effects if of the technical solution of the utility model, on the basis of technique scheme, slag tap coil structures and do liner with refractory materials of garden column type is made in the body of heater bottom of this generating unit; Perhaps the described body of heater of this generating unit bottom being provided with outlet passageway is: the body of heater lower periphery is provided with the circular channel and lower furnace portion central authorities are provided with centre channel, and two passages, one end is communicated with the burner hearth of body of heater, and the other end leads to suction unit; Perhaps above-mentioned two improvement projects are used simultaneously.

The further purpose of the utility model is to improve the calorific value of this generating unit institute producing coal gas on the above-mentioned purpose basis.

For reaching this purpose, body of heater top with this generating unit on the basis of aforementioned each technical scheme is provided with bell, bell and body of heater top adopt removable jew to be tightly connected, upper of furnace body is provided with inlet pipe, the vaporized chemical device is made up of oxygen-enriched generator, rotary vane type air door, steam pipe and heat exchanger at least, oxygen-enriched generator is connected with rotary vane type air door one end through pipeline, and the other end of rotary vane type air door is communicated with after heat exchanger leads to inlet pipe with steam pipe.

Because technique scheme has been done further improvement to former generating unit, makes to the utlity model has following advantage:

1. because upper of furnace body adopts water jacket, the body of heater bottom is adopted refractory materials to do liner and is incubated, and can prevent the furnace wall slagging scorification dross of high-temperature gasification layer effectively, guarantee gasification reaction long-term, stable, normally carry out.Can also effectively utilize the water vapor in the water jacket in addition, make the required steam realization of gasification reaction self-sufficiency in the burner hearth.

2. the garden cylindricality circle of slagging tap is adopted in the body of heater bottom, has guaranteed that structurally furnace charge moves down evenly, and fire bed is stablized, and avoids furnace charge to move down inequality, thereby has overcome inclined to one side stove, cavity, slagging scorification phenomenon.

3. original coal gas is extracted out by the circular channel of body of heater lower periphery, change into by the centre channel of this circular channel and body of heater bottom and extracting out simultaneously, overcome vaporized chemical most moving downward along the furnace wall and the limit wind that causes is excessive in burner hearth, the air-flow short circuit phenomenon, it is more even that vaporized chemical is moved in burner hearth.

4. bell and body of heater top adopt removable jew to be tightly connected, and adopt oxygen-enriched generator combustion-supporting, make into the contained saturation steam amount of stove vaporized chemical to be effectively controlled, and the gasification level is stable, can improve caloric power of gas 30～80%, and less energy consumption, and working cost is low.

Below in conjunction with drawings and Examples the utility model is further described.

Accompanying drawing 1 is the utility model example structure synoptic diagram.

Wherein: 1. oxygen-enriched generator; 2. valve; 3. pipeline; 4. rotary vane type air door; 5. mixing tube; 6. steam pipe; 7. bell; 8. high temperature resistant asbestos packing; 9. body of heater; 10. inlet pipe; 11. water jacket; 12. outlet pipe; The circle 13. the garden cylindricality is slagged tap; 14. fire grate; 15. water seal ash-pan; 16. ash bin; 17. centre channel; 18. thermometer; 19. vacuum pump; 20. outlet pipe; 21. heat exchanger; 22. little grey cutter; 23. liner; 24. big grey cutter; 25. burner hearth; 26. circular channel; 27. support.

Embodiment 1 is a kind of and stream open type gazogene, comprise body of heater 9, fire grate 14 and the water seal ash-pan 15 that places body of heater 9 belows, the lower end of body of heater 9 and ash bin 16 are fixedly connected and be communicated with, the bottom of ash bin 16 is stretched among the water seal ash-pan 15, fire grate 14 places the central authorities of burner hearth 25 bottoms and ash bin 16, body of heater 9 is fixed on the support 27, water jacket 11 structures are adopted on body of heater 9 tops, its underpart adopts refractory materials to do liner 23, body of heater 9 tops are opened wide, body of heater 9 bottoms are adopted the garden column type to slag tap and are enclosed 13 structures, it is that body of heater 9 lower periphery are provided with circular channel 26 and burner hearth 25 lower central are provided with centre channel 17 that described body of heater 9 bottoms are provided with outlet passageway, two passages, one end is communicated with the burner hearth 25 of body of heater 9, the other end leads to vacuum pump 19 through outlet pipe 12 and outlet pipe 20, between outlet pipe 12 and outlet pipe 20 and vacuum pump, cooling can also be set, dedusting and washing device, described water seal ash-pan 15 comprise 6 little grey cuttves 22 that set within it, 2 big grey cuttves 24 and mechanical drive.

Embodiment 2 is for a kind of and flow closed coal gas and send out and hold device, on the basis of embodiment 1, body of heater 9 tops are provided with bell 7, described bell 7 adopts removable jew to be tightly connected to realizing that through high temperature resistant asbestos packing 8 removable jew is tightly connected by the spiral hold-down mechanism in bell 7 and body of heater 9 tops with body of heater 9 tops, also can adopt other removable jew mode that is tightly connected, body of heater 9 tops are provided with inlet pipe 10, inlet pipe 10 circularizes and has a plurality of apertures along its tube wall, so that inlet pipe 10 is communicated with burner hearth 25, the vaporized chemical device is by oxygen-enriched generator 1, valve 2, rotary vane type air door 4, steam pipe 6, thermometer 18 and heat exchanger 21 are formed, oxygen-enriched generator 1 adopts artificial zeolite's molecular sieve pressure-swing absorption apparatus (being called for short PSA), oxygen-enriched generator 1 through valve 2 and pipeline 3 with feed mixing tube 5 after rotary vane type air door 4 is connected, mixing tube 5 is communicated with steam pipe 6 after thermometer 18 and heat exchanger 21 lead to inlet pipe 10.

During work, start the PSA device, open valve 2, oxygen level reaches 90～95% oxygen-rich air and enters mixing tube 5 through pipeline 3, in mixing tube 5, rely on the injection power of oxygen-rich air, make the opening part of mixing tube 5 form negative pressuren zone, external air is inhaled into mixing tube 5 thus to be mixed, the inlet of rotation rotary vane type air door 4 adjustable airs; Saturated vapor enters mixing tube 5 through steam pipe 6, and goes into stove temperature of saturation value by the observing and controlling of temperature of saturation measuring and control device, and controls the content of water vapor in the vaporized chemical with this; Vaporized chemical enters burner hearth 25 and the reaction of bunker coal generating gasification by inlet pipe 10 after heat exchanger 21 preheatings.The fuel bed upper surface between 200～300 millimeters, is controlled in water jacket 11 districts of body of heater 9, in case dross whole high-temperature gasification floor apart from inlet pipe 5 lower surfaces.When needing the refuel coal, open the spiral hold-down mechanism on the bell 7, rely on spiral hold-down mechanism pressure and high temperature resistant asbestos packing 8 during operation body of heater 9 top seals.The lime-ash that bunker coal gasification reaction back forms falls into water seal ash-pan 15 through slag tap circle 13 of garden column type after by fire grate 14 breaks, and the little grey cutter 22 in its dish and big grey cutter 24 gather ashes and discharge out of the furnace.When starting the PSA device, start vacuum pump 19, gasification reaction institute producing coal gas is under the effect of vacuum pump 19, extract out simultaneously by the circular channel 26 of body of heater 9 lower periphery and the centre channel 17 of furnace chamber 25 lower central respectively, after cooling, dedusting, washing, enter vacuum pump 19 force feeds to the user.

Claims

1, a kind of cocurrent flow type gazogene, comprise body of heater 9, fire grate 14 and the water seal ash-pan 15 that places body of heater 9 belows, the burner hearth 25 of body of heater 9 is communicated with water seal ash-pan 15, fire grate 14 places the central authorities of burner hearth 25 bottoms and connection place, it is characterized in that: water jacket 11 structures are adopted on body of heater 9 tops, and its underpart adopts refractory materials to do liner 23; Body of heater 9 bottoms are provided with outlet passageway.

2, generating unit according to claim 1 is characterized in that: body of heater 9 bottoms are adopted the garden column type to slag tap and are enclosed 13 structures.

3, generating unit according to claim 1, it is characterized in that: it is that body of heater 9 lower periphery are provided with circular channel 26 and burner hearth 25 lower central are provided with centre channel 17 that described body of heater 9 bottoms are provided with outlet passageway, two passages, one end is communicated with the burner hearth 25 of body of heater 9, and the other end leads to suction unit.

4, generating unit according to claim 2, it is characterized in that: it is that body of heater 9 lower periphery are provided with circular channel 26 and burner hearth 25 lower central are provided with centre channel 17 that described body of heater 9 bottoms are provided with outlet passageway, two passages, one end is communicated with the burner hearth 25 of body of heater 9, and the other end leads to suction unit.

5, according to claim 1 or 2 or 3 or 4 described generating units, it is characterized in that: body of heater 9 tops are provided with bell 7, bell 7 adopts removable jew to be tightly connected with body of heater 9 tops, body of heater 9 tops are provided with inlet pipe 10, the vaporized chemical device is made up of oxygen-enriched generator 1, rotary vane type air door 4, steam pipe 6 and heat exchanger 21 at least, oxygen-enriched generator 1 is communicated with rotary vane type air door 4 one ends through pipeline 3, and the other end of blade air door 4 is communicated with after heat exchanger 21 leads to inlet pipe 10 with steam pipe 6.