CN102180526B

CN102180526B - Flameless chemical-looping combustion reduction furnace

Info

Publication number: CN102180526B
Application number: CN201110064088XA
Authority: CN
Inventors: 吴福儿
Original assignee: University of Shaoxing
Current assignee: University of Shaoxing
Priority date: 2011-03-17
Filing date: 2011-03-17
Publication date: 2013-11-20
Anticipated expiration: 2031-03-17
Also published as: CN102180526A

Abstract

The invention discloses a flameless chemical-looping combustion reduction furnace. The furnace comprises a reducer and a reducer cyclone separator, wherein a reducer circular fluidization outlet on the upper part of the reducer and a reducer circular fluidization inlet on the lower part of the reducer are respectively communicated with a reducer cyclone separator circular fluidization inlet on the upper part of the reducer cyclone separator and a reducer cyclone separator circular fluidization outlet at the bottom of the reducer cyclone separator; the reducer comprises a furnace body consisting of fireproof bricks; the cross section of the furnace body is round; the outer wall of the furnace body is coated with a heat-insulating layer; the furnace body is provided with a NiO spray pipe, a petroleum or natural gas spray pipe with a valve, a Ni powder outlet and an electric heating tube; the NiO spray pipe and the petroleum or natural gas spray pipe are positioned in the middle of the furnace body; and the spray directions of the two spray pipes are opposite to each other and are tangent to the inner wall of the furnace body. Compared with the prior art, the furnace has a simple structure and a wide application range and ensures that reduction reaction is sufficient.

Description

Without flame chemistry chain burning reduction furnace

Technical field

The present invention relates to reduction furnace, especially a kind of without flame chemistry chain burning reduction furnace.

Background technology

Global warming is mainly due to CO ₂The a large amount of dischargings that are master's greenhouse gases cause the aggravation of global greenhouse effect to cause.Control and minimizing CO ₂Quantity discharged for the impact that solves atmosphere Greenhouse effect and Global warming, have vital role.CO ₂Discharging, most of CO wherein ₂Except by fire coal, being produced, be mainly that burning petroleum and products thereof produces.Within the period of quite growing future, fuel oil is that main power source general layout can not change, and oil, natural gas consumption, by sustainable growth, are controlled CO in fuel oil, natural gas production ₂Discharging for solving atmosphere Greenhouse effect and Global warming, have significant effect.

Summary of the invention

The object of the invention is to: provide a kind of simple in structure, reduction reaction is abundant, applied widely without flame chemistry chain burning reduction furnace.

For achieving the above object, the present invention can take following technical proposals:

the present invention is a kind of without flame chemistry chain burning reduction furnace, comprise reducer and reducer cyclonic separator, the ciculation fluidized outlet of reducer on described reducer top and the ciculation fluidized entrance of reducer of bottom are communicated with the ciculation fluidized entrance of reducer cyclonic separator on reducer cyclonic separator top and the ciculation fluidized outlet of reducer cyclonic separator of bottom respectively, described reducer comprises the body of heater that consists of refractory brick, the cross section of described body of heater is circular, its outer wall is enclosed with thermal insulation layer, on described body of heater, be provided with the NiO spray tube, be with valvular oil or natural gas injection pipe, the outlet of Ni powder and electric heating tube, described NiO spray tube, oil or natural gas injection pipe are positioned at body of heater middle part, and both injection directions in opposite directions and all tangent with the inwall of body of heater.

The injection direction of described NiO spray tube and oil or natural gas injection pipe forms 90 degree angles.

Described electric heating tube is positioned at the middle part of described NiO spray tube and oil or natural gas injection pipe inspection confluence, and this electric heating tube is for reacting the temperature that the 850-960 degree is provided while starting.

Compared with prior art, the invention has the beneficial effects as follows: due to described reducer, comprise the body of heater that is formed by refractory brick, the cross section of described body of heater is circular, on described body of heater, be provided with the NiO spray tube, be with valvular oil or natural gas injection pipe, the outlet of Ni powder and electric heating tube, described NiO spray tube, oil or natural gas injection pipe are positioned at the body of heater middle part, both injection directions in opposite directions and all tangent with the inwall of body of heater, this structure, oil or Sweet natural gas are fully mixed with NiO, reduction reaction is thorough, and the heat that produces in the unit time is large; High insulating effect, thermo-efficiency is high.

Further effect is: due to the injection direction formation 90 degree angles of NiO spray tube and oil or natural gas injection pipe, this structure, NiO and oil or Sweet natural gas form swirling eddy, mix more abundant, more fully thoroughly, the thermo-efficiency of generation is high for reduction reaction; Described electric heating tube is located to the middle part of described NiO spray tube and oil or natural gas injection pipe inspection confluence, for reacting the temperature that the 850-960 degree is provided while starting, this structure, directly heat mixed gas, heating efficiency is high, saves warm up time.The present invention is applicable to other reduction reaction, and is applied widely.

The accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Fig. 2 is the A-A cross-sectional view of Fig. 1.

Fig. 3 is the structure &processes schematic flow sheet of oil that the present invention is applied to, natural gas flameless chemical looping combustion power system.

Fig. 4 is the structural representation of oxidizer in Fig. 3.

Embodiment

Fig. 1 and Fig. 2 show a kind of without flame chemistry chain burning reduction furnace, comprise reducer 1 and reducer cyclonic separator 2, the ciculation fluidized outlet of reducer on described reducer 1 top and the ciculation fluidized entrance of reducer of bottom are communicated with the ciculation fluidized entrance of reducer cyclonic separator on reducer cyclonic separator 2 tops and the ciculation fluidized outlet of reducer cyclonic separator of bottom respectively, described reducer 1 comprises the body of heater 101 that consists of refractory brick, the cross section of described body of heater 101 is circular, its outer wall is enclosed with thermal insulation layer, in order to increase bearing capacity, can also once establish the steel plate reinforcement layer in body of heater 101 peripheries.On described body of heater 101, be provided with NiO spray tube 103, with the oil of valve 104 or natural gas injection pipe 105, the outlet 107 of Ni powder and electric heating tube 106; Described NiO spray tube 103, oil or natural gas injection pipe 105 are positioned at body of heater 101 middle parts, both injection direction forms 90 degree angles, spray in opposite directions and injection direction all tangent with the inwall of body of heater 101.Described electric heating tube 106 is positioned at the middle part that described NiO spray tube 103 and oil or natural gas injection pipe 105 spray confluence, and this electric heating tube 106 is be used to reacting the temperature that the 850-960 degree is provided while starting; Described Ni powder outlet 107 is positioned at the bottom of body of heater 101.

Fig. 3 is the structure &processes schematic flow sheet that the present invention is applied to oil, natural gas flameless chemical looping combustion power system, and Fig. 4 is the structural representation of oxidizer in Fig. 3.As shown in Figures 1 to 4, described oil, natural gas flameless chemical looping combustion power system comprise: the present invention who consists of reducer 1 and reducer cyclonic separator 2 is without flame chemistry chain burning reduction furnace, oxidizer 10, oxidizer cyclonic separator 9, compressor 3, saturex 4, condenser 6, carbon dioxide collection tank, a stage turbine 5 and two-stage turbine machine 8.Described reducer 1 has NiO spray tube 103, with the oil of valve 104 or natural gas injection pipe 105, Ni powder outlet 107, electric heating tube 106; Described oxidizer 10 has NiO powder outlet 1007, compressed air inlet 1003, Ni powder entrance, the ciculation fluidized outlet of oxidizer and the ciculation fluidized entrance of oxidizer; The oxidizer body of heater 1001 of this oxidizer 10 consists of refractory brick, and the cross section of described oxidizer body of heater 1001 is circular, and its outer wall is enclosed with the thermal insulation layer that consists of asbestos; In order to increase bearing capacity, can also once establish the steel plate reinforcement layer in oxidizer body of heater 1001 peripheries; Described Ni powder entrance upstream is provided with Ni powder transfer roller 1004 and Ni powder funnel 1005; Ni powder entrance and compressed air inlet 1003 are positioned at oxidizer body of heater 1001 bottoms, and both injection directions in opposite directions and all tangent with the inwall of oxidizer body of heater 1001.Oxidizer 10 also is provided be used to controlling the total valve 1006 of Ni powder entrance and compressed air inlet 1003.Described reducer cyclonic separator 2 has the ciculation fluidized outlet of reducer cyclonic separator, the ciculation fluidized entrance of reducer cyclonic separator and reducer cyclonic separator pneumatic outlet; Described oxidizer cyclonic separator 9 has the ciculation fluidized outlet of oxidizer cyclonic separator, the ciculation fluidized entrance of oxidizer cyclonic separator and oxidizer cyclonic separator pneumatic outlet; Described condenser 6 has condenser inlet, CO ₂Export, reach H ₂The O outlet, described CO ₂Outlet is communicated with described carbon dioxide collection tank.The NiO spray tube 103 of described reducer 1, Ni powder outlet 107, the ciculation fluidized outlet of reducer and the ciculation fluidized entrance of reducer are communicated with the ciculation fluidized entrance of reducer cyclonic separator and the ciculation fluidized outlet of reducer cyclonic separator of the NiO powder outlet 1007 of oxidizer 10, Ni powder entrance, reducer cyclonic separator 2 respectively; The compressed air inlet 1003 of described oxidizer 10 is communicated with described compressor 3 through described saturex 4, and the ciculation fluidized outlet of its oxidizer and the ciculation fluidized entrance of oxidizer are communicated with the ciculation fluidized entrance of oxidizer cyclonic separator and the ciculation fluidized outlet of oxidizer cyclonic separator of described oxidizer cyclonic separator 9 respectively; The reducer cyclonic separator pneumatic outlet of described reducer cyclonic separator 2 is communicated with condenser 6 entrances through a described stage turbine 5; The oxidizer cyclonic separator pneumatic outlet of described oxidizer cyclonic separator 9 is communicated with described two-stage turbine machine 8, and the pneumatic outlet of two-stage turbine machine 8 communicates with atmosphere.The power output shaft of a described stage turbine 5 and two-stage turbine machine 8 is in transmission connection, and forms power shaft.Described power shaft is in transmission connection with generator 7 and described compressor 3 respectively.

Technical process without the burning of flame chemistry chain mainly comprises:

Flow process A: oil or natural gas after slagging-off is processed are sent in reducer 1 by oil or natural gas injection pipe 105, electric heating tube 106 is heated to the 850-960 degree by the temperature in reducer 1, for reacting while starting, provide heat, reducer 1 forms circulating fluidized bed with reducer cyclonic separator 2, in reducer 1, oil or natural gas and from the NiO of oxidizer 10 reaction, generate temperature less than 600 degree, pressure less than the pure CO of the High Temperature High Pressure of 20Mpa ₂Gas, reaction equation is:

+ heat

Or

+ heat

For chemical reaction is fully carried out, described NiO spray tube 103, oil or natural gas injection pipe 105 are positioned at the body of heater middle part, both injection directions in opposite directions and all tangent with the inwall of body of heater 101, thereby form swirling eddy, have the characteristics such as reaction effect is good, simple in structure; Described electric heating tube 106 is positioned at the middle part that described NiO spray tube 103 and oil or natural gas injection pipe 105 spray confluence, for reacting the temperature that the 850-960 degree is provided while starting, this structure, directly heat mixed gas, heating efficiency is high, saves warm up time.

Oxidizer 10 forms circulating fluidized bed with oxidizer cyclonic separator 9, in the Ni of reducer 1 interior generation sends into oxidizer 10 by Ni powder entrance, through the air of compressor 3, saturex 4 compressions, by compressed air inlet 1003, send in oxidizer 10 simultaneously, for chemical reaction is fully carried out, the injection direction of Ni powder entrance and compressed air inlet 1003 in opposite directions and all tangent with the inwall of body of heater 1001.In oxidizer 10, oxidizing reaction occurs, Ni is oxidized to NiO, reaction equation is:

2Ni+O ₂→ 2NiO+ heat.

Flow process B: reaction generates the pure CO of High Temperature High Pressure ₂Gas is sent into work done in a stage turbine 5 by reducer wind separator 2, drives generator 7 generatings, also for compressor 3, provides power simultaneously; From out temperature oxidizer cyclonic separator 9 less than 600 degree, pressure less than the High Temperature High Pressure N of 20Mpa ₂Gas, deliver to work done in two-stage turbine machine 8, drives generator 7 generatings, also for compressor 3, provides power simultaneously.

Flow process C: be condensed into pure CO through condenser 6 from a stage turbine 5 gas out ₂Gas and water, by pure CO ₂Gas recovery is in the carbon dioxide collection tank.

Claims

1. one kind without flame chemistry chain burning reduction furnace, comprise reducer (1) and reducer cyclonic separator (2), the ciculation fluidized outlet of reducer on described reducer (1) top and the ciculation fluidized entrance of reducer of bottom are communicated with the ciculation fluidized entrance of reducer cyclonic separator on reducer cyclonic separator (2) top and the ciculation fluidized outlet of reducer cyclonic separator of bottom respectively, it is characterized in that: described reducer (1) comprises the body of heater (101) that consists of refractory brick, the cross section of described body of heater (101) is circular, its outer wall is enclosed with thermal insulation layer, on described body of heater (101), be provided with NiO spray tube (103), oil or natural gas injection pipe (105) with valve (104), the outlet of Ni powder (107) and electric heating tube (106), described NiO spray tube (103), oil or natural gas injection pipe (105) are positioned at body of heater (101) middle part, and both injection directions in opposite directions and all tangent with the inwall of body of heater (101).

2. according to claim 1 without flame chemistry chain burning reduction furnace, it is characterized in that: the injection direction of described NiO spray tube (103) and oil or natural gas injection pipe (105) forms 90 degree angles.

3. according to claim 2 without flame chemistry chain burning reduction furnace, it is characterized in that: described electric heating tube (106) is positioned at the middle part that described NiO spray tube (103) and oil or natural gas injection pipe (105) spray confluence, and this electric heating tube (106) is be used to reacting the temperature that the 850-960 degree is provided while starting.