CN212377990U - Heat accumulating type thermal oxidation device for treating sintering waste gas of electroplating sludge - Google Patents
Heat accumulating type thermal oxidation device for treating sintering waste gas of electroplating sludge Download PDFInfo
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Abstract
The utility model relates to a heat accumulating type thermal oxidation device for treating electroplating sludge sintering waste gas, which flexibly adjusts the temperature of waste gas entering an inlet of an RTO heat accumulation bed layer and the flow velocity of the waste gas flowing through the heat accumulation bed layer by arranging an inlet fresh air fan, and flexibly adjusts the heat load distribution by arranging an RTO cold bypass adjusting pipeline and a heat bypass adjusting pipeline, thereby adjusting the temperature of an RTO heat accumulation chamber and a combustion chamber and improving the heat recovery efficiency; through new trend fan, cold and hot bypass regulation, avoid organosilicon to burn in the middle part of the heat accumulator, set up the problem that the bed blockked up difficult clearance at heat accumulation bed top portion simultaneously and solve the replacement layer. The utility model discloses a to the targeted improvement of RTO device, make its characteristics that adapt to electroplating sludge sintering waste gas, solved current actual problem, realized long period safety high efficiency operation, satisfy emission standard requirement, volatile organic compounds desorption efficiency reaches more than 99%, has good economic benefits and environmental benefit.
Description
Technical Field
The utility model relates to a waste gas treatment technical field, concretely relates to handle heat accumulation formula thermal oxidation (hereinafter abbreviated as RTO) device of electroplating sludge sintering waste gas.
Background
Because the sintering waste gas of the electroplating sludge has complex components, and has the characteristics of large fluctuation of the heat value of combustible components (including volatile organic compounds, carbon monoxide and the like), high occupation ratio of low self-ignition point components, organic silicon-containing components and the like besides pollutants such as dust, oxysulfide, nitric oxide and the like, the existing mature technologies of other industries cannot be simply applied, and a proper technical route needs to be developed according to the actual conditions of the industries.
At present, the domestic electroplating sludge sintering device is only provided with dust removal and desulfurization equipment generally, does not have the requirements of removing pollutants such as nitric oxide, volatile organic compounds and the like, and does not meet the emission requirements specified by new standards.
The combined removal and modification of multiple pollutants in the industry is in a starting stage, and Chinese patent CN208824269U discloses an ultralow emission device for smelting waste gas, wherein the waste gas is heated by a heat exchanger and then enters an RTO (regenerative thermal oxidizer) to remove volatile organic compounds, then nitrogen oxides are removed by an SCR (selective catalytic reduction), and then the waste gas is discharged by a chimney after passing through a vertical dust remover. Chinese patent CN109316952A discloses a flue gas ultra-low emission device and process in the non-electric field, waste gas is firstly sprayed into a desulfurizer through a flue for desulfurization, then enters a main body tower for dust removal, then volatile organic waste gas is removed through an RCO/RTO device, simultaneously the waste gas enters an SCR for nitrogen oxide removal after temperature rise, and finally waste heat is recovered and discharged. Chinese patent CN108057343A discloses a heat accumulating type selective reduction denitration device and process, which adopts a method of segmenting an RTO high temperature zone and a heat accumulating layer, an SNCR block is arranged in a hearth zone, an SCR block is arranged in a heat accumulating tank, and the simultaneous removal of volatile organic compounds and nitrogen oxides is realized by switching at least three switching valves. US 9314739B 2 discloses a heat accumulating type selective reduction denitration process and apparatus, wherein the process adopts a heat accumulation layer segmentation method, and an SCR block is respectively arranged between two heat accumulation layers. The general idea of the above-mentioned patent all is that volatile organic compounds and other combustible gases in the desorption waste gas of utilizing the RTO device on the one hand, and on the other hand utilizes the heat that the RTO combustion process produced to improve the waste gas temperature in order to satisfy follow-up SCR unit's requirement.
However, in the practical engineering application of electroplating sludge sintering waste gas treatment, due to the factors of large heat value fluctuation of combustible components of waste gas, large proportion of low self-ignition point components, organic silicon-containing components and the like, the RTO heat storage body has low heat recovery efficiency, and the blockage of a bed layer is not easy to clear, so that the flue gas purification system cannot be operated safely and efficiently for a long time. The prior RTO treatment process has the following technical problems:
1. because the combustible components of the waste gas generated by sintering the electroplating sludge have large heat value fluctuation and large low spontaneous combustion point ratio, substances with low spontaneous combustion points reach the spontaneous combustion points at the early preheating stage of the regenerator in the operation process, the substances with high spontaneous combustion points are released by oxidation combustion at the middle part or even the middle lower part of a heat storage bed layer, the released heat causes the waste gas to be heated to cause more substances with high spontaneous combustion points to be combusted in the heat storage body, when the heat value of the waste gas is high, the middle temperature of the heat storage body exceeds 800 ℃, the heat storage performance of the heat storage body is reduced, and almost half of the heat storage body does not play a heat storage role. Therefore, the heat recovery efficiency of the heat accumulator in actual operation is only 60-70%, and is even lower and far lower than 85-95% of the design requirement. The RTO exhaust temperature rises, the temperature difference between an inlet and an outlet becomes large, and a vicious circle is formed in cycles.
On the other hand, because the heat recovery efficiency is remarkably reduced, the temperature of the combustion chamber cannot be maintained, and heat needs to be supplemented through the combustor, so that additional consumption of natural gas is caused. In addition, because the RTO inlet and outlet temperature difference is big, in the valve switching operation process, the RTO heat accumulator supporting beam is cold and hot to change greatly, and thermal fatigue leads to roof beam body unstability easily, has the potential safety hazard.
One of the existing methods for solving the problem that the heat storage function of the heat storage body is lost due to the ultrahigh temperature in the middle of the heat storage body is staged combustion, and Chinese patent CN106016305A discloses a method for removing organic waste gas with low self-ignition point, namely, the waste gas with high concentration and low self-ignition point is pretreated by low-temperature thermal oxidation and then is subjected to water absorption operation to remove acid gas, and the waste gas after the acid gas is removed is sent to RTO for treatment. Chinese patent CN108488809A discloses a method for treating organic waste gas with low self-ignition point by using regenerative oxidation furnace, and the content is substantially similar to the principle of patent CN 106016305A. If the method is applied to the treatment of the electroplating sludge sintering waste gas, on one hand, the online detection of the concentration of the low self-ignition point substance is a difficult problem because the fluctuation of the components and the concentration of the waste gas is large; on the other hand, the method needs to increase a whole set of low-temperature thermal oxidation pretreatment device and a device for removing acid gas, and has complex process and large investment; and the fluctuation of the components and the concentration of the sintering waste gas of the electroplating sludge is large, and the pretreatment method of partial combustion has safety risks such as explosion and the like.
The second method is to remove most of the heat accumulators and only keep the heat accumulators with the height less than about 600mm, so that most of combustible materials pass through the heat accumulators before ignition, and the combustion in the heat accumulators is avoided. However, in the method, most of the heat accumulators are removed, the heat storage capacity of the rest heat accumulators is insufficient, the heat recovery efficiency of 60-70% can be only obtained, and even lower, the actual operation condition is basically consistent with that when the heat accumulators are not removed, and the part of the heat accumulators which do not work originally is removed substantially. Therefore, although the method solves the problem of ultrahigh temperature in the middle of the heat accumulator, the method does not solve the problems of low RTO heat recovery efficiency, large temperature difference between the inlet and the outlet and extra consumption of natural gas.
2. In addition, the electroplating sludge sintering waste gas contains organic silicon components, the organic silicon components generate silicon dioxide powder after being combusted, the diameter of the powder is small, about 0.001-0.01 mm, the powder has strong viscosity, and the powder can adhere to a ceramic heat accumulator of a heat accumulation bed to influence heat energy exchange and hinder gas flow. The field test shows that the device runs for six months, a large amount of silicon dioxide is adhered to the surface of the heat accumulator, the system resistance is rapidly increased, and finally the equipment is forced to stop. Due to the reason of the problem 1, the organosilicon is combusted in the middle of the heat accumulator, so that a channel in the middle of the heat accumulator is blocked and is not easy to clean. The measures taken by the current practical project are that after the operation is carried out for a period of time, the heat accumulator is completely taken out of the RTO for cleaning or replacement, the workload is large, the cleaning difficulty is large, the consumed time is long, and the influence on the production and operation is large. The replacement cost of the heat storage body is high because the heat storage body is inevitably damaged in the replacement and cleaning processes. The other mode is to adopt a silicon-resistant heat accumulator material to delay the adhesion of silicon dioxide on the surface of the heat accumulator, but in actual operation, the method can only reduce the accumulation of the silicon dioxide to a certain extent, and cannot fundamentally stop the blockage of the silicon dioxide in the middle of the heat accumulator.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in that the electroplating sludge sintering waste gas combustible component calorific value that exists to above-mentioned prior art is undulant big, it is big that low spontaneous combustion point component accounts for the ratio, factor such as containing organosilicon component leads to RTO heat accumulator heat recovery efficiency low, the bed blocks up the difficult problem of clearing up, a heat accumulation formula thermal oxidation device of handling electroplating sludge sintering waste gas is provided, can effectively improve the heat recovery efficiency of heat accumulator, can satisfy the long-term safe and stable operation of RTO device under the undulant various operating modes of electroplating sludge sintering waste gas composition calorific value, the problem of organosilicon inside the jam difficult clearance of heat accumulator that leads to has avoided burning in the heat accumulator simultaneously.
The utility model discloses a solve the technical scheme that technical problem that the aforesaid provided adopted and be:
a heat accumulating type thermal oxidation device for treating electroplating sludge sintering waste gas comprises a heat accumulating type thermal oxidation furnace, wherein the heat accumulating type thermal oxidation furnace comprises an inlet pipeline, a first heat accumulating chamber, a combustion chamber, a second heat accumulating chamber and an outlet pipeline, and regular heat accumulators are arranged in the first heat accumulating chamber and the second heat accumulating chamber; the heat accumulating type thermal oxidation device also comprises a fresh air fan arranged at an inlet of the heat accumulating type thermal oxidation furnace, and the frequency regulation of a frequency converter of the fresh air fan is in associated control with the temperature of the combustion chamber, the temperature of the two heat accumulating chambers and the total concentration of waste gas combustible; a cold bypass pipeline and a cold bypass regulating valve are arranged between an inlet pipeline and a combustion chamber of the heat accumulating type thermal oxidation furnace, or a hot bypass pipeline and a hot bypass regulating valve are arranged between the combustion chamber and an outlet pipeline, or the cold bypass pipeline and the hot bypass pipeline are arranged at the same time; the cold bypass regulating valve and the hot bypass regulating valve are respectively controlled in association with the temperature of the combustion chamber.
In the scheme, the heights of the regular heat accumulators in the first heat accumulator and the second heat accumulator are 900-1200 mm.
In the scheme, the regular heat accumulator is paved with a random heat accumulator, and the height of the random heat accumulator is 100-200 mm.
In the scheme, a heat accumulator supporting beam is arranged below the regular heat accumulator.
In the above scheme, the fresh air fan adopts a variable frequency fresh air fan.
In the scheme, the air volume of the fresh air blown by the fresh air fan accounts for 20% -50% of the original air volume of the sintering waste gas.
The beneficial effects of the utility model reside in that:
1. the utility model solves the problem that the heat recovery efficiency of the heat accumulator is reduced because the low spontaneous combustion point material is burnt in the middle part or even the middle lower part of the heat accumulator in advance, and can improve the heat recovery efficiency of the RTO heat accumulator which is actually operated by 60-70% to 85-90%; the combustion chamber can realize self-sustaining combustion, so that a combustor does not need to be started, the consumption of natural gas is saved, meanwhile, the temperature of the combustion chamber is increased, volatile organic compounds are completely combusted, and the removal efficiency is improved to more than 99%.
2. The improvement of the heat recovery efficiency of the heat accumulator reduces the temperature difference between the RTO inlet and the RTO outlet, obviously slows down the thermal fatigue supported by the heat accumulator, and ensures the long-period safe operation of the equipment.
3. The cold bypass and the hot bypass are arranged on the heat accumulating type thermal oxidation furnace, so that the RTO device can safely and stably operate for a long time under various working conditions of electroplating sludge sintering waste gas component heat value fluctuation.
4. Through placing the random heat accumulator as the replacement layer on regular heat accumulator, avoided organosilicon to lead to the problem that the heat accumulator is inside to block up difficult clearance at the inside burning of heat accumulator, showing and having reduced maintenance work load and heat accumulator change expense, increase system availability and technology unit life-span.
5. The utility model has simple process and low investment, and can be widely used for the emission of similar industrial waste gas.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is a structural diagram of a heat accumulating type thermal oxidation device for treating sintering waste gas of electroplating sludge.
In the figure: 10. a regenerative thermal oxidation furnace; 11. an inlet duct; 111. a first inlet conduit; 112. a first inlet switching valve; 113. a second inlet conduit; 114. a second inlet switching valve; 12. a first regenerator; 121. a heat accumulator support beam; 122. regulating a heat accumulator; 123. a bulk thermal mass; 13. a combustion chamber; 131. a burner; 14. a second regenerator; 15. an outlet conduit; 151. a first outlet conduit; 152. a first outlet switching valve; 153. a second outlet conduit; 154. a second outlet switching valve; 20. a fresh air fan; 30. a cold bypass line; 31. a cold bypass regulating valve; 40. a hot bypass line; 41. and a thermal bypass regulating valve.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the heat accumulating type thermal oxidation apparatus for treating sintering waste gas of electroplating sludge provided by the present invention comprises a heat accumulating type thermal oxidation furnace 10 and a variable frequency fresh air blower 20. The regenerative thermal oxidizer 10 is a two-chamber RTO and includes an inlet pipe 11, a first regenerator 12, a combustion chamber 13, a second regenerator 14, and an outlet pipe 15. The inlet pipe 11 is divided into a first inlet pipe 111 connected to the first regenerative chamber 12 and a second inlet pipe 113 connected to the second regenerative chamber 14, a first inlet switching valve 112 is provided on the first inlet pipe 111, and a second inlet switching valve 114 is provided on the second inlet pipe 113. The outlet pipe 15 is divided into a first outlet pipe 151 connected to the first thermal storage chamber 12 and a second outlet pipe 153 connected to the second thermal storage chamber 14, a first outlet switching valve 152 is provided on the first outlet pipe 151, and a second outlet switching valve 154 is provided on the second outlet pipe 153. The heat accumulator supporting beam 121, the regular heat accumulator 122 and the scattered heat accumulator 123 are sequentially arranged in the first heat accumulator 12 and the second heat accumulator 14 from bottom to top, the height of the regular heat accumulator 122 is 900-1200 mm, the height of the scattered heat accumulator 123 is 100-200 mm, and the scattered heat accumulator 123 serves as a replacement layer and is replaced during maintenance of the device. The combustion chamber 13 is disposed on top of the two regenerators and is communicated with the two regenerators, and a burner 131 is disposed in the combustion chamber 13 and is used for heating the regenerators to a certain temperature during start-up, or when the concentration of combustible substances in the exhaust gas is low, fuel is required to be supplemented to maintain the reaction temperature required by the combustion chamber 13.
A cold bypass pipeline 30 and a cold bypass adjusting valve 31 are arranged between an inlet pipeline 11 and a combustion chamber 13 of the regenerative thermal oxidation furnace 10, a hot bypass pipeline 40 and a hot bypass adjusting valve 41 are arranged between the combustion chamber 13 and an outlet pipeline 15, and the cold bypass adjusting valve 31 and the hot bypass adjusting valve 41 are respectively associated with and controlled by a temperature sensor in the combustion chamber 13.
The frequency conversion fresh air fan 20 is arranged at the inlet of the heat accumulating type thermal oxidation furnace 10, and the frequency adjustment of the frequency converter of the fresh air fan 20 is controlled in association with the temperature sensor in the combustion chamber 13. Fresh air is blown in through the fresh air fan 20 and mixed with sintering waste gas to enter the RTO, the air volume of the fresh air accounts for about 20% -50% of the air volume of the sintering waste gas, the temperature of mixed gas at an RTO inlet is reduced by about 50-100 ℃, and the gas flow rate of a regenerator is increased to 1.5-2 m/s from the conventional 1-1.5 m/s.
The process of the heat accumulating type thermal oxidation device for treating the sintering waste gas of the electroplating sludge comprises the following steps:
1) fresh air is blown into the variable-frequency fresh air fan 20 and is mixed with the electroplating sludge sintering waste gas of the RTO inlet pipeline 11. The air volume of the fresh air accounts for about 20-50% of the air volume of the sintering waste gas, the temperature of the mixed gas at the RTO inlet is reduced by about 50-100 ℃, and the combustion time of the substances with low self-ignition points in the regular heat accumulator 122 is delayed. The mixed gas enters the first regenerator 12 through the first inlet switching valve 112.
2) The mixed gas is subjected to heat exchange with the regular heat accumulator 122 in the first heat storage chamber 12, the waste gas absorbs heat and is heated, and the heat accumulator releases heat and is cooled. After the air quantity of the mixed gas is increased, the gas flow speed of the first regenerator 12 is increased from 1-1.5 m/s to 1.5-2 m/s, and substances with low self-ignition points are more easily brought into the combustion chamber 13 for combustion. Meanwhile, the height of the regular heat accumulator 122 is controlled to be 900-1200 mm, so that low-ignition-point substances quickly pass through a heat accumulation bed layer, the substances are prevented from being combusted in the regular heat accumulator 122, the normal heat absorption and release functions of the regular heat accumulator 122 are not influenced, and the RTO heat recovery efficiency is improved to 85% -90% from below 60-70%.
3) The mixed exhaust gas passing through the first regenerator 12 is combusted in the combustion chamber 13 to generate a large amount of heat enough to maintain self-sustaining combustion without starting the burner 131, thereby saving natural gas consumption. As the temperature of the combustion chamber 13 rises, the volatile organic compounds are fully combusted, and the removal efficiency exceeds 99 percent; meanwhile, the temperature difference of an RTO inlet and an RTO outlet is reduced, the thermal fatigue of the heat accumulator support is remarkably relieved, and the long-period safe operation of the equipment is ensured. Because the frequency adjustment of the frequency converter of the fresh air fan 20 is controlled in association with the temperature sensor in the combustion chamber 13, when the total concentration of combustible substances in the waste gas is high and the temperature of the combustion chamber 13 is low, the frequency of the fresh air fan 20 is increased, so that the concentration of the combustible substances and the temperature of the waste gas entering the heat accumulating type thermal oxidation furnace 10 are reduced, and the flow rate of the mixed gas is increased.
4) If the heat value of the components of the waste gas fluctuates, when the temperature of the combustion chamber 13 continuously rises to exceed 870-900 ℃, the cold bypass adjusting valve 31 is opened, and the waste gas is directly injected into the combustion chamber 13 through the cold bypass pipeline 30 so as to rapidly reduce the temperature of the combustion chamber 13; or the thermal bypass adjusting valve 41 is opened, and the surplus heat of the combustion chamber 13 is directly discharged out of the combustion chamber 13 through the thermal bypass pipeline 40. If the temperature of the combustion chamber 13 is still continuously increased or the temperature of the RTO outlet pipe 15 is too high, the cold bypass adjusting valve 31 and the hot bypass adjusting valve 41 are simultaneously opened, so that the operation under the condition of wide fluctuation of the calorific value of the components of the waste gas can be met. When the cold bypass adjusting valve 31 is independently opened, the adjusting air quantity is 0-10% of the air input quantity of the heat accumulating type thermal oxidation furnace 10; when the thermal bypass adjusting valve 41 is independently opened, the adjusting air quantity is 0-30% of the air inflow quantity of the heat accumulating type thermal oxidation furnace 10.
5) Through the steps, most of organic silicon is also brought into the combustion chamber 13 quickly to be combusted, silicon dioxide powder is still generated in the combustion process, and the regular heat accumulator 122 is paved with a scattered heat accumulator 123 with the thickness of 100-200 mm as a replacement layer on the upper surface, so that the silicon dioxide powder generated by combustion is adhered to the replacement layer, and when the device is overhauled, the top scattered heat accumulator 123 can be replaced conveniently without cleaning the internal regular heat accumulator 122.
6) The gas after combustion in the combustion chamber 13 enters the second regenerator 14, the waste gas releases heat, the gas is discharged through the RTO second outlet pipe 153 after being cooled, and the regular heat accumulator 122 in the second regenerator 14 absorbs heat for heating the waste gas in the next cycle.
7) After one cycle is completed, the air inlet valve and the air outlet valve are switched to change the direction of the air flow. Exhaust gas enters the second regenerator 14 through a second inlet line 113 and the cleaned gas is discharged from the first regenerator 12 through a second outlet line 153. This is done alternately and continuously.
The utility model discloses handle heat accumulation formula thermal oxidation device of electroplating sludge sintering waste gas has following beneficial effect:
(1) the oxygen content in the electroplating sludge sintering waste gas is about 15 percent generally, the oxygen demand of RTO combustion is completely met, and fresh air is not required to be supplemented according to the convention. However the utility model discloses set up frequency conversion new trend fan very much at the RTO entry, it mixes with sintering waste gas to blow into fresh air through new trend fan, and the purpose of mending fresh air is not in increasing oxygen content, but adjusts the temperature that gets into RTO heat accumulation bed layer entry waste gas and the velocity of flow that waste gas flowed through the heat accumulation bed layer. The air volume of the fresh air accounts for about 20-50% of the original air volume of the sintering waste gas, the temperature of the mixed gas at the inlet of the RTO heat storage bed layer is reduced by about 50-100 ℃ compared with the temperature of the original sintering waste gas, and the ignition time of the low self-ignition point substance in the heat storage body is delayed. After the air quantity of the mixed gas is increased, the flow speed of the waste gas flowing through the heat storage bed layer is increased to 1.5-2 m/s from 1-1.5 m/s, and substances with low self-ignition points are more easily brought into a combustion chamber for combustion.
(2) The utility model discloses the frequency modulation of new trend fan converter is chain with combustion chamber temperature, regenerator temperature, waste gas combustible substance total concentration, avoids low spontaneous combustion point material on-line measuring's difficult point, and when waste gas combustible substance total concentration is high and the combustion chamber temperature is low on the contrary, should increase new trend fan frequency, and the combustible substance burns at the combustion chamber, and the combustion chamber temperature rises, and RTO heat recovery efficiency risees. As the temperature of the combustion chamber rises, the volatile organic compounds are completely combusted, and the removal efficiency is improved to more than 99 percent.
(3) 90-95% heat recovery efficiency needs higher regenerator bed, leads to low auto-ignition point material to burn in the middle part of the regenerator, leads to actual heat recovery efficiency to show the decline on the contrary. The utility model discloses a heat accumulation layer design is avoided pursuing too high heat recovery efficiency, and the height of the regular heat accumulator of rational adjustment is in 900 ~ 1200mm scope, makes the low ignition point material pass through the heat accumulation bed layer fast, avoids its burning in the heat accumulator, combines other measures of this scheme to realize 85 ~ 90% heat recovery efficiency.
(4) Because the fluctuation of the heat value of the components of the electroplating sludge sintering waste gas is large, when the heat recovery efficiency exceeds 85 percent, the fluctuation of the heat value of the waste gas often exceeds the heat value required by self-sustaining combustion. The utility model discloses the cold bypass that sets up can be when the combustion chamber temperature continuously rises and surpass 870 ~ 900 ℃, directly pour into waste gas into to the combustion chamber through cold bypass to reduce the combustion chamber temperature rapidly, when opening cold bypass alone, its regulating gas volume is 0 ~ 10% of RTO air input; or directly discharging the redundant heat of the combustion chamber out of the combustion chamber through the thermal bypass to reduce the temperature of the combustion chamber to a set range, and when the thermal bypass is independently started, adjusting the air flow to be 0-30% of the RTO air inflow. If the temperature of the combustion chamber is still continuously increased or the temperature of the RTO outlet is too high, the cold bypass and the hot bypass arranged in the scheme can be simultaneously opened, so that the method is suitable for large-range fluctuation operation of the heat value of the sintering waste gas of the electroplating sludge.
(5) Adopt above-mentioned scheme, most organosilicon will also be brought into the combustion chamber fast and burn, though still will produce the silica powder after the burning, but these powder adhesion are on the random heat accumulator of replacement layer, and during the device overhauls, can be convenient with the random heat accumulator replacement in top, need not to clear up inside heat accumulator.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (6)
1. A heat accumulating type thermal oxidation device for treating electroplating sludge sintering waste gas comprises a heat accumulating type thermal oxidation furnace, wherein the heat accumulating type thermal oxidation furnace comprises an inlet pipeline, a first heat accumulating chamber, a combustion chamber, a second heat accumulating chamber and an outlet pipeline, and regular heat accumulators are arranged in the first heat accumulating chamber and the second heat accumulating chamber; the device is characterized by also comprising a fresh air fan arranged at an inlet of the heat accumulating type thermal oxidation furnace, wherein the frequency adjustment of a frequency converter of the fresh air fan is controlled in association with the temperature of a combustion chamber, the temperature of two heat accumulating chambers and the total concentration of waste gas combustible; a cold bypass pipeline and a cold bypass regulating valve are arranged between an inlet pipeline and a combustion chamber of the heat accumulating type thermal oxidation furnace, or a hot bypass pipeline and a hot bypass regulating valve are arranged between the combustion chamber and an outlet pipeline, or the cold bypass pipeline and the hot bypass pipeline are arranged at the same time; the cold bypass regulating valve and the hot bypass regulating valve are respectively controlled in association with the temperature of the combustion chamber.
2. A regenerative thermal oxidizer for treating sintering waste gas of electroplating sludge as claimed in claim 1 wherein the height of the regular heat accumulators in the first and second regenerators is 900-1200 mm.
3. A regenerative thermal oxidizer for treating waste sintering gas from electroplating sludge as claimed in claim 1 wherein said regular heat accumulator is paved with a random heat accumulator, and the height of said random heat accumulator is 100-200 mm.
4. A regenerative thermal oxidizer for treating sintering exhaust gas from electroplating sludge as claimed in claim 1 wherein a thermal support beam is disposed under said structured thermal support.
5. A regenerative thermal oxidizer for treating sintering waste gas of electroplating sludge as claimed in claim 1 wherein said fresh air blower is a variable frequency fresh air blower.
6. A regenerative thermal oxidizer for treating sintering waste gas of electroplating sludge as claimed in claim 1 wherein the fresh air volume blown by the fresh air blower is 20-50% of the original air volume of sintering waste gas.
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| CN111750367A (en) * | 2020-07-02 | 2020-10-09 | 武汉凯迪电力环保有限公司 | Heat accumulating type thermal oxidation device and process for treating sintering waste gas of electroplating sludge |
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| CN111750367A (en) * | 2020-07-02 | 2020-10-09 | 武汉凯迪电力环保有限公司 | Heat accumulating type thermal oxidation device and process for treating sintering waste gas of electroplating sludge |
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