CN204042834U - A kind of adjustable caloric receptivity waste heat boiler - Google Patents
A kind of adjustable caloric receptivity waste heat boiler Download PDFInfo
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- CN204042834U CN204042834U CN201420458784.8U CN201420458784U CN204042834U CN 204042834 U CN204042834 U CN 204042834U CN 201420458784 U CN201420458784 U CN 201420458784U CN 204042834 U CN204042834 U CN 204042834U
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- flue gas
- heat boiler
- waste heat
- drum
- caloric receptivity
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Abstract
This application discloses a kind of adjustable caloric receptivity waste heat boiler, this is adjustable, and caloric receptivity waste heat boiler comprises body of heater and drum, described body of heater has an exhaust gases passes, this exhaust gases passes has a high-temperature flue gas import and low-temperature flue gas outlet, heat exchanger tube is provided with in described exhaust gases passes, the two ends of described heat exchanger tube are communicated with to form the heat-exchanging loop that circulate with tedge with described drum respectively by down-comer, described drum is provided with a saturated vapor outlet, between the outlet of this saturated vapor and drum, is provided with steam pressure control valve.The utility model regulates the caloric receptivity of waste heat boiler to ensure the stable of its exit gas temperature with this by the method changing saturated vapor outlet pressure, the high-temperature flue gas that dangerous waste incineration can be made to produce plays the load that maximum effectiveness can not increase again follow-up flue gas purification system, provides guarantee for whole CIU runs normally, effectively.
Description
Technical field
The application belongs to hazardous waste process field, particularly relates to the adjustable caloric receptivity waste heat boiler of a kind of dangerous waste incineration.
Background technology
The burning disposal of hazardous waste refers to and is placed in incinerator by hazardous waste, under the condition of high temperature and sufficient oxygen content, carry out oxidation reaction, the process that hazardous waste is decomposed or degrades.In order to the generation ensureing that the burning of hazardous waste is complete, reduce harmful substances from flue gases, need in incinerator to keep higher ignition temperature, national standard also has relevant hard and fast rule, need add auxiliary fuel to ensure ignition temperature when the calorific value of hazardous waste is lower.Containing amount of heat in the high-temperature flue gas that high-temp combustion produces, if so large heat be not used be the energy one waste, therefore, when operating mode allows, dangerous waste incineration project generally all can arrange residual neat recovering system to reclaim heat to reduce operating cost.
Waste heat boiler becomes the most frequently used waste heat recovery apparatus due to advantages such as heat transfer efficiency are high, high temperature resistant, compact conformation, mounting cost are low, and waste heat boiler utilizes the used heat of combustion tail gas produce steam for thermal source thus reach the object of waste heat recovery.But waste heat boiler is as a kind of equipment of passive heat absorption, and when the heat that its entrance flue gas temperature or exhaust gas volumn i.e. flue gas itself carry changes, its exit gas temperature also can change thereupon.
Wish that the exit gas temperature of waste heat boiler controls at about 500 DEG C under normal circumstances, easily produce lower than in 500 DEG C then flue gas the difficulty that bioxin strengthens follow-up gas cleaning, cause again the waste of energy higher than 500 DEG C.And in the Actual combustion process of hazardous waste, because the composition of hazardous waste is different, the amount of the required auxiliary fuel that causes burning is different, burning required air quantity is also different, the exhaust gas volumn of corresponding generation also can be different; Meanwhile, combustion process itself is a unmanageable process, and ignition temperature can fluctuate unavoidably to some extent, and the flue-gas temperature of corresponding generation also can fluctuate thereupon.The change of exhaust gas volumn or flue-gas temperature all can make the heat of flue gas change, that is in dangerous waste incineration process produce flue gas heat can change, the flue-gas temperature which results in heat boiler outlet place can change to some extent.
When the heat of incinerator exiting flue gas is less, smoke temperature at outlet of waste heat boiler may be reduced to less than 500 DEG C, now has a large amount of bioxin in flue gas and generates, even if probably make flue gas also cannot reach discharge standard through purified treatment; When the heat of incinerator exiting flue gas is larger, smoke temperature at outlet of waste heat boiler higher than 500 DEG C, may cause the waste of energy.
Utility model content
The purpose of this utility model provides a kind of adjustable caloric receptivity waste heat boiler, to overcome deficiency of the prior art.
For achieving the above object, the utility model provides following technical scheme:
The embodiment of the present application discloses a kind of adjustable caloric receptivity waste heat boiler, comprise body of heater and drum, described body of heater has an exhaust gases passes, this exhaust gases passes has a high-temperature flue gas import and low-temperature flue gas outlet, heat exchanger tube is provided with in described exhaust gases passes, the two ends of described heat exchanger tube are communicated with to form the heat-exchanging loop that circulate with tedge with described drum respectively by down-comer, described drum are provided with a saturated vapor outlet, are provided with steam pressure control valve between the outlet of this saturated vapor and drum.
Preferably, in above-mentioned adjustable caloric receptivity waste heat boiler, described drum is also provided with a demineralized water entrance.
Preferably, in above-mentioned adjustable caloric receptivity waste heat boiler, described low-temperature flue gas exit is also provided with temp probe.
Preferably, in above-mentioned adjustable caloric receptivity waste heat boiler, also comprise a control device, this control device is connected with described temp probe and steam pressure control valve respectively, and described control device receives the signal of described temp probe and controls steam pressure control valve.
Compared with prior art, the utility model has the advantage of: the adjustable caloric receptivity waste heat boiler for dangerous waste incineration of the present utility model, for the situation of dangerous waste incinerator exiting flue gas heat instability, its caloric receptivity is changed by the mode changing heat boiler outlet saturated vapour pressure, thus make when the flue gas entering waste heat boiler changes in uniform temperature, range of flow, heat boiler outlet temperature remains on a stationary value.This kind of method can heat fully in recovered flue gas, can suppress again the generation of a large amount of bioxin in flue gas.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Figure 1 shows that the principle schematic of adjustable caloric receptivity waste heat boiler in the utility model specific embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be described in detail the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of the utility model protection.
Figure 1 shows that waste heat boiler agent structure, waste heat boiler main body is made up of body of heater 1, heat exchanger tube 2, drum 4, communicating pipe (down-comer 3, tedge 5) between heat exchanger tube 2 and drum 4 and pipeline fittings (valve, measuring point etc.).It is inner that heat exchanger tube 2 is placed in body of heater 1, and heat exchanger tube 2 outer wall and body of heater 1 form the exhaust gases passes that (high-temperature flue gas import N1, low-temperature flue gas export N2) is imported and exported in airtight having.Drum 4, tedge 5, down-comer 3 and heat exchanger tube 2 inside are interconnected, and form a closed circuit, inside is full of the steam water interface with certain pressure, and drum 4 is provided with demineralized water import N3 and saturated vapor exports N4.Temp probe T is equipped with to measure the temperature of exiting flue gas in exhaust-heat boiler flue gas outlet N2 place, and steam pressure control valve V is equipped with at saturated vapor outlet N4 place.
During work, high-temperature flue gas enters waste heat boiler inside from N1 mouth, wash away heat exchanger tube 2 release heat and conduct heat to the steam water interface in pipe by the outer wall of heat exchanger tube 2, after high-temperature flue gas heat release temperature reduce become low-temperature flue gas from N2 mouth discharge enter follow-up flue gas purification system.What steam water interface absorbed heat rear section in high-temperature flue gas in heat exchanger tube 2 water is vaporized into steam, under the effect of gravitational difference, steam water interface constantly circulates in the closed system that drum 4, tedge 5, heat exchanger tube 2 and down-comer 3 form, this process is constantly brought into demineralized water in heat exchanger tube 2 from drum 4, steam to be brought in drum 4 from heat exchanger tube 2 and then to discharge for user from saturated vapor outlet N4, demineralized water supplements from the demineralized water import N3 system of entering.
Can be learnt by the thermodynamic computing of waste heat boiler, when the steam pressure of heat exchanger tube 2 inside is higher, vapor (steam) temperature is higher, and the temperature difference inside and outside heat exchanger tube 2 is less, and heat-transfer effect is poorer, and the heat that in heat transfer process, demineralized water absorbs is less.That is, the caloric receptivity of waste heat boiler can be changed by the steam pressure changing heat exchanger tube 2 inside.During design, this waste heat boiler saturated vapor outlet pressure presses maximum pressure design, and the situation that namely, waste heat boiler minimum by flue gas institute heat content recepts the caloric minimum designs, and the temperature of low-temperature flue gas outlet N2 is by 500 DEG C of designs.The flue-gas temperature recorded using temp probe T is as the foundation of steam regulation outlet pressure.
The data of measurement are sent to control device by temp probe T, the amplitude that control device regulates by calculating corresponding control steam pressure control valve.
Control device can comprise microprocessor (MCU), this MCU can comprise CPU (Central Processing Unit, CPU), read-only memory module (read-only memory, ROM), random memory module (random access memory, RAM), time block, digital-to-analogue conversion module (A/D converter) and plural I/O port.Certainly, control device also can adopt the integrated circuit of other form, as: application-specific IC (Application Specific Integrated Circuit, or field programmable gate arrays (Field Programmable Gate Array, FPGA) etc. ASIC).
When equipment runs, if outlet N2 place flue-gas temperature is lower than 500 DEG C, improve outlet vapor pressure by steam pressure control valve V, the caloric receptivity reducing waste heat boiler with this makes exit gas temperature raise to some extent; If outlet N2 place flue-gas temperature is higher than 500 DEG C, reduce outlet vapor pressure by steam pressure control valve V, the caloric receptivity increasing waste heat boiler with this makes exit gas temperature decline to some extent.The exit gas temperature of waste heat boiler is made to remain at design load about 500 DEG C by above-mentioned regulating action.
The utility model regulates the caloric receptivity of waste heat boiler to ensure the stable of its exit gas temperature with this by the method changing saturated vapor outlet pressure, the high-temperature flue gas that dangerous waste incineration can be made to produce plays the load that maximum effectiveness can not increase again follow-up flue gas purification system, provides guarantee for whole CIU runs normally, effectively.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The above is only the detailed description of the invention of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of the application.
Claims (4)
1. an adjustable caloric receptivity waste heat boiler, it is characterized in that, comprise body of heater and drum, described body of heater has an exhaust gases passes, this exhaust gases passes has a high-temperature flue gas import and low-temperature flue gas outlet, and be provided with heat exchanger tube in described exhaust gases passes, the two ends of described heat exchanger tube are communicated with to form the heat-exchanging loop that circulate with tedge with described drum respectively by down-comer, described drum is provided with a saturated vapor outlet, between the outlet of this saturated vapor and drum, is provided with steam pressure control valve.
2. adjustable caloric receptivity waste heat boiler according to claim 1, is characterized in that: described drum is also provided with a demineralized water entrance.
3. adjustable caloric receptivity waste heat boiler according to claim 1, is characterized in that: described low-temperature flue gas exit is also provided with temp probe.
4. adjustable caloric receptivity waste heat boiler according to claim 3, it is characterized in that: also comprise a control device, this control device is connected with described temp probe and steam pressure control valve respectively, and described control device receives the signal of described temp probe and controls steam pressure control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420458784.8U CN204042834U (en) | 2014-08-14 | 2014-08-14 | A kind of adjustable caloric receptivity waste heat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420458784.8U CN204042834U (en) | 2014-08-14 | 2014-08-14 | A kind of adjustable caloric receptivity waste heat boiler |
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| Publication Number | Publication Date |
|---|---|
| CN204042834U true CN204042834U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420458784.8U Expired - Fee Related CN204042834U (en) | 2014-08-14 | 2014-08-14 | A kind of adjustable caloric receptivity waste heat boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154515A (en) * | 2014-08-14 | 2014-11-19 | 张家港市艾克沃环境能源技术有限公司 | Waste heat boiler with heat absorption capacity adjustable and control method of boiler |
-
2014
- 2014-08-14 CN CN201420458784.8U patent/CN204042834U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154515A (en) * | 2014-08-14 | 2014-11-19 | 张家港市艾克沃环境能源技术有限公司 | Waste heat boiler with heat absorption capacity adjustable and control method of boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20180814 |
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| CF01 | Termination of patent right due to non-payment of annual fee |