CN1481927A - Dry type stack gas desulfurization method and its apparatus - Google Patents
Dry type stack gas desulfurization method and its apparatus Download PDFInfo
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- CN1481927A CN1481927A CNA031098126A CN03109812A CN1481927A CN 1481927 A CN1481927 A CN 1481927A CN A031098126 A CNA031098126 A CN A031098126A CN 03109812 A CN03109812 A CN 03109812A CN 1481927 A CN1481927 A CN 1481927A
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Abstract
The present invention relates to one kind of fume desulfurizing method and device for combustion apparatus. One two-stage desulfurizing reactor is adopted. In the middle part of the first stage of the desulfurizing reactor, there is expansion section is arranged, and one fume supplying unit with blades makes fume rotating and entering to the first stage of the desulfurizing reactor for full contact between the fume and desulfurizing agent. Then, fume is made to enter to the second stage or the cyclonic desulfurizing reactor for further desulfurizing and gas-solid separation. Compared with available technology, the technological process and apparatus of present invention is simple, reliable, less in pressure loss, compact in structure, high in desulfurizing efficiency and low in cost. It is especially suitable for in some area with deficiency in water resource.
Description
Technical field
The present invention relates to the method and the device of the flue gas desulfurization of discharging in a kind of combustion apparatus, particularly a kind of dry type flue gas desulfurizing method and device belong to the flue gas desulfurization technique field.
Background technology
The pollution of sulfur dioxide is the focus of world many countries environmental protection always, and the flue gas desulfurization technique that various countries successively develop has reached kind more than 200.But, can be applied to the industrial kind more than ten of but having only.Up to the present, in the Industrial Boiler and station boiler of fire coal, adopt the wet process of FGD technology more than 90%.The wet desulphurization technology is owing to need bigger fund input and higher water consumption, and in the area of some economics of underdevelopment, shortage of water resources, its application is very restricted.In the exploitation of few water desulfur technology, the use in conjunction of dry desulfurizer and circulating bed reactor is one of desulfur technology commonly used at present.Chinese invention patent ZL98120507.0 discloses " temp. dry type circulating fluid bed flue gas desulfurization method and device in a kind of ", being characterized in utilizing with the calcium-based desulfurizing agent is the circulating fluidized bed device of bed material, make sulfur in smoke and bed material under higher operating temperature, desulphurization reaction take place, and the desulfurizing agent that carried out the partial desulfurization reaction is done steam activation handle.Utility model patent 95240758.2 is a kind of " n " deformation speed circulating fluidized bed dry desulfurizers, comprises air-introduced machine, deduster, star-like valve, air groove and fluid bed body.The characteristics of this patent are that recirculating fluidized bed is the recirculating fluidized bed of " n " shape variable-ratio.Chinese invention patent application 00128285.9 is a kind of dry cyclic suspension bed fume desulfurizing process and system, be characterized in mixing the formed material in back by a certain percentage as absorbent with dry lime, the isolated flying dust of deduster and water, in system, adopt lower resistance flue gas fluidic architecture, interior separating component and external low-resistance separator.For above-mentioned patent, because having adopted the circulation fluidized bed device is desulfurization reactor, brought the higher pressure loss by air distribution plate (or flue gas fluidic device), higher material concentration, increase very big operating cost to actual motion, and therefore technology and structure relative complex have also restricted the generally popularization of these methods.At present, the flue gas desulfurization technique of the few water of exploitation, efficient, low operating cost is numerous environmentalists' a striving direction always.
Summary of the invention
The purpose of this invention is to provide a kind of technology is simple, the system pressure loss is little and operating cost is low dry type flue gas desulfurizing method and device.
The objective of the invention is to be achieved through the following technical solutions:
(1) flue gas by combustion apparatus is through an air compartment that can make it form rotational flow, after improving flue gas flow rate, a contracting nozzle enters the first grade desulfurizing reactor that a centre has expansion arc again, simultaneously calcium-based desulfurizing agent is sent in the first grade desulfurizing reactor, make air-flow from the bottom to top rotating flow cross the first grade desulfurizing reactor;
(2) flue gas that comes out in the first grade desulfurizing reactor tangentially enters cyclone type secondary desulfurization reactor through pipeline, and after centrifugation, the flue gas of purification therefrom flows out on the mind-set;
(3) separated desulfurizing agent that gets off and dust enter following dust arrester installation and discharge.
Make the upwards flow velocity of flue gas in the first grade desulfurizing reactor should be 1～2m/s among the present invention.
The present invention also provides a kind of dry type flue gas desulfurizing device of implementing said method, this device mainly comprises the first grade desulfurizing reactor, the flue gas that links to each other with the first grade desulfurizing reactor infeeds device and desulfurizing agent feedway, cyclone type secondary desulfurization reactor and the dust-precipitator that is arranged on this reactor lower part, described flue gas infeeds device and adopts its inner band swirl vane, its outlet to be the air compartment of contracting nozzle, and to be arranged on the bottom of first grade desulfurizing reactor; Described first grade desulfurizing reactor adopts the middle part to have the tube structure of expansion arc; The outlet of described first grade desulfurizing reactor is connected by the import of pipeline with the secondary desulfurization reactor.
Described first grade desulfurizing reactor middle part expansion arc diameter is 1.2-1.5 a times of upper and lower section diameter of reactor.
The thin wooden club shape structure in thick two in the middle of described cyclone type secondary desulfurization reactor adopts.
The present invention compared with prior art, have the following advantages and beneficial effect: 1. owing to adopted blade-carrying flue gas feedway, for the incoming flow flue gas provides rotation needed power, the whirlwind that can form in the reactor under the prerequisite of less increase flue gas pressures loss flows; Owing to do not have the air distribution plate and the material cyclic process of similar cycle bed, thereby reduced the pressure loss yet.2. since expansion arc, eddy flow to the stagnation of flue gas, ensured the time of contact of flue gas and desulfurizing agent, improved desulfuration efficiency 3. owing to adopted whirlwind secondary desulfurizer, can effectively reduce the content of particle in the flue gas, weakened the influence of back-end ductwork corrosion with wearing and tearing.Therefore, it is simple that the present invention has technology, compact conformation, and the system pressure loss is little, and investment and the lower advantage of operating cost are particularly suitable at the area and the middle-size and small-size Industrial Boiler of some economics of underdevelopment, shortage of water resources.
Description of drawings
Fig. 1 is the structural representation of dry type desulfurizing device embodiment provided by the invention.
The specific embodiment
Further specify the concrete enforcement of the present invention and the course of work below in conjunction with accompanying drawing.
The course of work of the present invention is as follows: the flue gas that is come by combustion apparatus is in piping 1 enters an air compartment 12 that has a rotating vane 2; Drive connecting axle 3 by motor 4 and rotate, flow thereby make the incoming flow flue gas form whirlwind; The outlet of air compartment is provided with a contracting nozzle, makes it form higher fluid velocity through contracting nozzle, enters in the first grade desulfurizing reactor 5 that is arranged on air compartment top.This desulfurization reactor 5 is a tube structure, and the middle part has expansion arc 6, and first grade desulfurizing reactor middle part expansion arc diameter is 1.2～1.5 times of upper and lower section diameter of reactor, and entering wherein the flue gas flow velocity that makes progress is 1～2m/s; Mix with the solid desulfurating agent that charging gear 9 infeeds simultaneously, carry out drying, the desulphurization reaction process of particle.The expansion arc 6 that is arranged in the reactor stage casing mainly plays the effect that increases particle and sorbent particle time of contact, can improve the utilization rate of desulfurizing agent, thereby realize higher desulfuration efficiency.The preparation of desulfurizing agent is to adopt quick lime, flyash and water to mix; The moisture content of general desulfurizing agent is less than 15%, and its particle diameter is less than 80 microns.Charging gear 9 can adopt screw(-type) feeder, and the desulfurizing agent in loading hopper 7 drives through motor 8, enters desulfurization reactor 5.Behind first grade desulfurizing reactor 5, flue gas tangentially enters cyclone type secondary desulfurizer 11 through pipeline 10.The secondary desulfurization reactor is the whirlwind barrel structure, can adopt the similar wooden club shape of shape---the centre is the thin structure in two slightly, helps prolonging the time of contact of desulfurizing agent and flue gas.Because flue gas is tangentially to enter, flow so in second reactor, still form a whirlwind, air-flow flows downward along wall, therefrom flows out on the mind-set then.In this process, a part of particle is understood owing to centrifugal action is deposited on wall, thereby enters following dust arrester installation 13.Collected dust can pass through Open valve 14 removal systems.Flue gas is discharged from the top after secondary desulfurization reactor 11 purifies.
Claims (5)
1. dry type flue gas desulfurizing method, this method comprises the steps:
(1) flue gas by combustion apparatus is through an air compartment that can make it form rotational flow, after improving flue gas flow rate, a contracting nozzle enters the first grade desulfurizing reactor that a centre has expansion arc again, simultaneously calcium-based desulfurizing agent is sent in the first grade desulfurizing reactor, make air-flow from the bottom to top rotating flow cross the first grade desulfurizing reactor;
(2) flue gas that comes out in the first grade desulfurizing reactor tangentially enters cyclone type secondary desulfurization reactor through pipeline, and after centrifugation, the flue gas of purification therefrom flows out on the mind-set;
(3) separated desulfurizing agent that gets off and dust enter following dust arrester installation and discharge.
2. according to the described dry type flue gas desulfurizing method of claim 1, it is characterized in that: the upwards flow velocity of flue gas in the first grade desulfurizing reactor is 1～2m/s.
3. implement the dry type flue gas desulfurizing device of method as claimed in claim 1 or 2 for one kind, it is characterized in that: this device mainly comprises first grade desulfurizing reactor (5), the flue gas that links to each other with the first grade desulfurizing reactor infeeds device and desulfurizing agent feedway, cyclone type secondary desulfurization reactor (11) and be arranged on the dust-precipitator (13) of this reactor lower part, described flue gas infeeds device and adopts its inner band swirl vane (2), its outlet to be the air compartment of contracting nozzle (12), and to be arranged on the bottom of first grade desulfurizing reactor; Described first grade desulfurizing reactor adopts the middle part to have the tube structure of expansion arc (6); The outlet of described first grade desulfurizing reactor is connected with the import of secondary desulfurization reactor (11) by pipeline (10).
4. according to the described dry type flue gas desulfurizing device of claim 3, it is characterized in that: the diameter of described first grade desulfurizing reactor middle part expansion arc (6) is 1.2～1.5 times of hypomere diameter on the reactor.
5. according to the described dry type flue gas desulfurizing device of claim 4, it is characterized in that: the thin wooden club shape structure in thick two in the middle of described cyclone type secondary desulfurization reactor (11) adopts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109812 CN1201853C (en) | 2003-04-11 | 2003-04-11 | Dry type stack gas desulfurization method and its apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03109812 CN1201853C (en) | 2003-04-11 | 2003-04-11 | Dry type stack gas desulfurization method and its apparatus |
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| CN1481927A true CN1481927A (en) | 2004-03-17 |
| CN1201853C CN1201853C (en) | 2005-05-18 |
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| CN 03109812 Expired - Fee Related CN1201853C (en) | 2003-04-11 | 2003-04-11 | Dry type stack gas desulfurization method and its apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101884877A (en) * | 2010-07-30 | 2010-11-17 | 鞍山市东盛能源设备有限公司 | Spiral diffusion powder dry method desulfuration system device |
| CN102120131A (en) * | 2011-01-14 | 2011-07-13 | 华电环保系统工程有限公司 | Method and device for desulfurizing flue gas of thermal power unit burning high sulfur coal |
| CN101690867B (en) * | 2009-05-25 | 2011-09-21 | 中国石油大学(北京) | Tangential-flow and direct-flow composite air intake desulfurizing tower of half dry type circulating fluidized bed (CFB) |
| CN106268274A (en) * | 2016-08-31 | 2017-01-04 | 无锡市华星电力环保修造有限公司 | A kind of efficient circulating fluid bed desulfurizer |
-
2003
- 2003-04-11 CN CN 03109812 patent/CN1201853C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101690867B (en) * | 2009-05-25 | 2011-09-21 | 中国石油大学(北京) | Tangential-flow and direct-flow composite air intake desulfurizing tower of half dry type circulating fluidized bed (CFB) |
| CN101884877A (en) * | 2010-07-30 | 2010-11-17 | 鞍山市东盛能源设备有限公司 | Spiral diffusion powder dry method desulfuration system device |
| CN101884877B (en) * | 2010-07-30 | 2012-09-05 | 鞍山市东盛能源设备有限公司 | Spiral diffusion powder dry method desulfuration system device |
| CN102120131A (en) * | 2011-01-14 | 2011-07-13 | 华电环保系统工程有限公司 | Method and device for desulfurizing flue gas of thermal power unit burning high sulfur coal |
| CN102120131B (en) * | 2011-01-14 | 2013-08-14 | 华电环保系统工程有限公司 | Method and device for desulfurizing flue gas of thermal power unit burning high sulfur coal |
| CN106268274A (en) * | 2016-08-31 | 2017-01-04 | 无锡市华星电力环保修造有限公司 | A kind of efficient circulating fluid bed desulfurizer |
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| Publication number | Publication date |
|---|---|
| CN1201853C (en) | 2005-05-18 |
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Granted publication date: 20050518 Termination date: 20100411 |