CN202581842U

CN202581842U - Device for burning solid fuel by using chemical chain

Info

Publication number: CN202581842U
Application number: CN2012200737599U
Authority: CN
Inventors: 陈时熠; 向文国; 薛志鹏; 张瑞坤
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2012-03-02
Filing date: 2012-03-02
Publication date: 2012-12-05
Anticipated expiration: 2022-03-02

Abstract

The utility model discloses a device for burning a solid fuel by using a chemical chain. The device consists of an air reactor, a gasifying reactor, a cyclone separator, a conveying tube, a fuel reactor, an overflow groove and a cyclone separator blanking tube, wherein the gasifying reactor is arranged inside the air reactor; the conveying tube is connected to the top end of the gasifying reactor; the conveying tube is connected with the bottom of the fuel reactor; the upper end of the air reactor is connected with the cyclone separator; the cyclone separator blanking tube is arranged at the lower end of the cyclone separator; the cyclone separator blanking tube is inserted into the fuel reactor; the fuel reactor is connected with the lower end side of the air reactor through the overflow groove; the bottom of the overflow groove is provided with a loose air vent; the bottom of the air reactor is provided with an air inlet; and the bottom of the air reactor is provided with a fuel steam inlet and a deslagging hole.

Description

The solid-fuelled device of a kind of burning chemistry chains

Technical field

The utility model relates to a kind of device of burning chemistry chains, relates in particular to a kind of burning chemistry chains solid fuel and separation of C O ₂Device.

Background technology

Since industrial civilization, the CO in the earth atmosphere ₂Concentration sharply rises owing to the Human's production activity.CO ₂As a kind of typical greenhouse gases, directly cause greenhouse effects.Along with Global climate change is remarkable day by day in recent years, CO ₂Capture the hot issue that becomes the current energy and environmental science research with (CCS) technology of sealing up for safekeeping.Burning chemistry chains is a kind of CO that grows up the eighties in 20th century ₂The separation and collection technology.The burning chemistry chains process is accomplished in two reactors, and one is air reactor, and another is the fuel reaction device, and the solid matter that in two reactors, circulates is called oxygen carrier.In air reactor, the oxygen carrier of lower valency is become high valence state by airborne dioxygen oxidation, and oxygen carrier obtains oxygen; The oxygen carrier of high valence state gets into the fuel reaction device, in the fuel reaction device by the fuel gas reduction, i.e. oxygen carrier release oxygen, oxygen carrier is come back to by high valence state and is that lower valency, the gaseous product of fuel reaction device are steam and CO ₂, after condensation separation goes out water wherein, obtain pure CO ₂, realize CO ₂Separation; The oxygen carrier of lower valency is got back to air reactor and is carried out circulation next time.The total reaction of burning chemistry chains still is the aerial combustion reaction of fuel, and this circulation is still passed through in acquisition and the heat that fuel burns and equates in air, and the burning chemistry chains process has realized CO ₂The inherence separate and do not need additional energy consumption.Therefore, burning chemistry chains is a kind of CO with future ₂Trapping technique also becomes one of current research focus.

The utility model content

The utility model provides a kind of burning chemistry chains solid-fuelled device, the utility model effective separation of C O when realizing solid fuel ignition ₂, having the advantage that reduces greenhouse gas emission, the utility model utilization makes full use of reaction self heat release, reduces system cost, improves reliability.

The technical scheme of the utility model is following:

The solid-fuelled device of a kind of burning chemistry chains is made up of air reactor, gasification reactor, cyclone separator, carrier pipe, fuel reaction device, overflow launder and cyclone separator tremie pipe; Gasification reactor places air reactor inner; The top of gasification reactor connects carrier pipe; Carrier pipe connects fuel reaction device bottom; The upper end of air reactor links to each other with cyclone separator; The lower end of cyclone separator is the cyclone separator tremie pipe; The cyclone separator tremie pipe inserts the inside of fuel reaction device; The fuel reaction device links to each other with the air reactor lower end side through overflow launder; The bottom of overflow launder is provided with loosening air port; The bottom of air reactor is provided with air intake; The bottom of gasification reactor is provided with fuel steam entry and slag-drip opening.

Compared with prior art, the utlity model has following advantage:

(1), the CO of the utility model employing ₂Separate mode is simple, is easy to obtain pure CO ₂The utility model belongs to chemical chain burning technology, has inherited the advantage of conventional chemical chain burning.Mature C O is gone up in industry at present ₂Isolation technics has the amine absorption method, and the major defect of amine absorption method is the complex manufacturing of amine absorber, and is with high costs; Amine absorber is poisonous simultaneously, and it can produce harm to operating personnel's health inevitably in production and use, and environment is caused secondary pollution.The oxygen-enriched combusting that new development is in recent years got up also is a kind of effective CO ₂The separation and collection technology, but the air separation unit of oxygen-enriched combusting needs a large amount of energy consumptions in the preparation process of pure oxygen, directly reduce whole system efficient.Fuel is utilized through the mode of burning chemistry chains, and the heat that fuel discharges in the process of burning chemistry chains equates with the heat that the aerial burning of fuel discharges, but the utility model adopts the method for condensation, has realized CO inherently ₂Do not need additional energy consumption with separating of steam, it will be further appreciated that, in utilizing the heat of burning chemistry chains, because heat transfer temperature difference is low, the loss of system reduces, and the energy service efficiency of system is improved.

(2), the utility model can use solid fuel, and tallies with the national condition, and is convenient to draw materials, and reduces system cost.In the burning chemistry chains of classics, the fuel reaction device adopts gaseous fuel usually, such as natural gas.But China is the country of a few oil, deficency, many coals.Coal is as the main fossil fuel of China, and its reserves are higher than natural gas far away.It is that a coal combustion process is realized CO that coal directly is used for burning chemistry chains ₂The effective way that captures.If coal and steam are directly sent into the fuel reaction device; The reduction of coal gasification and oxygen carrier is carried out in the fuel reaction device simultaneously; Can accelerate the reaction rate in the fuel reaction device although it is so, but owing to contain ash content in the coal, ash content is difficult to separate with oxygen carrier; It directly sticks to the oxygen carrier surface, causes the oxygen carrier inactivation; Simultaneously, coal possibly be mixed in oxygen carrier and get into together in the air reactor, contains CO in the flue gas that air reactor is exported ₂, reduced CO ₂Arresting efficiency.And in the utility model, fuel combustion is carried out in gasification reactor, and it is H that the generation of reaction back contains main component ₂, CO synthesis gas contact with NiO after being delivered to the fuel reaction device, Ni and air react the NiO that generates and are delivered to the fuel reaction device in air reactor, with synthesis gas reaction, gaseous product steam and CO ₂Discharge through the outlet of fuel reaction device, solid product Ni gets back to recycle in the air reactor; In the whole system in the gasification reactor the remaining ash of reaction grade, still stay in the gasification reactor and discharge by slag-drip opening, avoided contacting of ash content and oxygen carrier; And the CO in the entire reaction system ₂, all be that reaction generates in the fuel reaction device, produced simultaneously is steam, thereby can obtain pure CO easily through the method for condensation ₂, solved ash content and caused oxygen carrier inactivation and CO ₂Discharge the problem of the arresting efficiency reduction that causes with the flue gas of air reactor outlet.

(3), the utility model simplied system structure, reduce investment operating cost.In the past when using coal to act as a fuel to carry out burning chemistry chains; Need to increase extra gasification furnace; Coal is gasified in independent gasification furnace; The synthesis gas that the gasification back generates is sent into fuel reaction device and oxygen carrier reaction again, can effectively avoid oxygen carrier to contact with the direct of coal, has avoided oxygen carrier to adhere to ash content and inactivation.This mode needs extra gasification furnace, because gasification reaction is an endothermic reaction, needs the heat that thermal source provides gasification; Heat in the conventional gasification furnace is from the partial combustion of coal, and is in order to guarantee the synthesis gas calorific value, extraneous to gasification furnace conveying pure oxygen; The heat that pure oxygen and coal combustion provide gasification reaction to need; Need air separation unit but produce pure oxygen, air separation unit will consume lot of energy again in producing the process of pure oxygen, reduced system's net efficiency.So it is a kind of effective way that uses solid fuel that the synthesis gas after the coal gasification is carried out burning chemistry chains, but shortcoming need to be extra air separation unit to provide pure oxygen to supply with gasification furnace.The utility model places air reactor inner gasification reactor; Coal gasification institute calorific requirement in the gasification reactor is directed to the heat heat release that NiO that Ni oxidation by air in the air reactor generates high valence state discharges simultaneously; Air separation unit when not needing in the past to carry out burning chemistry chains; Reduce investment and operating cost, improved the operational reliability of system.

Description of drawings

Fig. 1 is the solid-fuelled installation drawing of the utility model burning chemistry chains.

The specific embodiment

A kind ofly be used to realize the solid-fuelled device of burning chemistry chains, form by air reactor 1, gasification reactor 2, cyclone separator 3, carrier pipe 4, fuel reaction device 5, overflow launder 6 and cyclone separator tremie pipe 7; Gasification reactor 2 places air reactor 1 inside; The top of gasification reactor 2 connects carrier pipe 4; Carrier pipe 4 connects fuel reaction device 5 bottoms; The upper end of air reactor 1 links to each other with cyclone separator 3; The lower end of cyclone separator 3 is a cyclone separator tremie pipe 7; The inside that cyclone separator tremie pipe 7 inserts fuel reaction device 5; Fuel reaction device 5 links to each other with air reactor 1 lower end side through overflow launder 6; The bottom D of overflow launder 6 is provided with loosening air port; The bottom of air reactor 1 is provided with air intake C; The bottom of gasification reactor 2 is provided with fuel steam entry A and slag-drip opening B.

Claims

1. the solid-fuelled device of burning chemistry chains is characterized in that: be made up of air reactor (1), gasification reactor (2), cyclone separator (3), carrier pipe (4), fuel reaction device (5), overflow launder (6) and cyclone separator tremie pipe (7); Gasification reactor (2) places air reactor (1) inside; The top of gasification reactor (2) connects carrier pipe (4); Carrier pipe (4) connects fuel reaction device (5) bottom; The upper end of air reactor (1) links to each other with cyclone separator (3); The lower end of cyclone separator (3) is cyclone separator tremie pipe (7); Cyclone separator tremie pipe (7) inserts the inside of fuel reaction device (5); Fuel reaction device (5) links to each other with air reactor (1) lower end side through overflow launder (6); The bottom (D) of overflow launder (6) is provided with loosening air port; The bottom of air reactor (1) is provided with air intake (C); The bottom of gasification reactor (2) is provided with fuel steam entry (A) and slag-drip opening (B).

2. the solid-fuelled device of burning chemistry chains according to claim 1, the loosening elegance that it is characterized in that feeding the bottom (D) of overflow launder (6) is used steam.