CN103432876B - A kind of kiln exhaust gas treating method - Google Patents
A kind of kiln exhaust gas treating method Download PDFInfo
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- CN103432876B CN103432876B CN201310368381.4A CN201310368381A CN103432876B CN 103432876 B CN103432876 B CN 103432876B CN 201310368381 A CN201310368381 A CN 201310368381A CN 103432876 B CN103432876 B CN 103432876B
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Abstract
The present invention provides the kiln exhaust gas treating method that a kind of resultant effect is good, energy-efficient, the method comprises the following steps: the first step, the tail gas discharged by kiln adds in the heater being used for heating generation high temperature mummification gas as gas regulator, and carries out denitration process；Second step, the gas obtained after the first step being completed enters spray tower and carries out contacting with slurry and carry out mummification, to obtain dry mash；3rd step, enters spray column by remaining gas after second step and carries out desulfurization and dedusting, and purified gas discharges, and reacted liquid and mud powder are then discharged into sedimentation tank as raw material.The processing method of the present invention can the effective tail gas of purified treatment kiln make its discharge up to standard, the method is in the process purifying kiln tail gas simultaneously, rationally reclaim and utilize the heat energy of tail gas to obtain dry mash and raw material, not only improve the effect of purified treatment kiln tail gas, but also improve the utilization rate of kiln tail gas, thus reach to save the effect of the energy and environmental protection.
Description
Technical field
The present invention relates to pottery manufacture field, more particularly, it relates to the processing method of a kind of ceramic kiln tail gas.
Background technology
In the finishing material that China uses, ceramic tile is the requirement that a kind of consumption is very big.But Production of Ceramics, also it is the important source of one causing atmospheric pollution.Because pottery must flow through high temperature and burns till the characteristic of ability porcelain, so ceramic industry is exactly the industry of a high energy consumption, high resource consumption, high pollution all the time.Ceramic product is in process of production, due to burning fuel such as natural gas, liquefied gas, coal gas, light diesel fuel, heavy oil, coal etc., a large amount of sulphur compound, oxynitrides and fluorine compounds can be discharged, natural environment can be caused significant impact by these harmful tail gas, cause the natural disasters such as acid rain, and affect the physical and mental health of natural environment and the mankind.Therefore, a kind of method researching and developing ceramic kiln vent gas treatment is imperative.
In the processing step of Production of Ceramics, the slurry mixed carries out high temperature mummification, and to become dry mash be also a necessary link.Gas heating is then passed to a certain amount of fresh air to high temperature by the current mode of production exactly, regulates to suitable temperature and carries out physics dehydration with the slurry mixed, and therefore, this link needs to consume substantial amounts of heat energy and forms high-temperature gas.And in the process of high temperature mummification also can inevitably in gas with the dust of mummification, these used gases there is also the problem needing purified treatment.
Therefore, it is necessary to propose the kiln exhaust gas treating method that a kind of resultant effect is good, energy-efficient, realize recycling environmental protection concept.
Summary of the invention
It is an object of the invention to overcome shortcoming of the prior art with not enough, it is provided that a kind of resultant effect is good, energy-efficient, realize recycling the kiln exhaust gas treating method of environmental protection concept；This exhaust gas treating method achieves making full use of of kiln tail gas high-temperature gas, and the purification integrated treatment of kiln tail gas with the gas with dust, the problem solving processing cost height, poor processing effect and relevant secondary pollution, the utilization rate of tail gas can be effectively improved and make tail gas discharge up to standard, there is the advantage saving the energy, environmental protection, be conducive to the method promotion and application in the industrial production.
In order to achieve the above object, the technical scheme is that: a kind of kiln exhaust gas treating method, it is characterised in that: comprise the following steps:
The first step, the tail gas discharged by kiln adds in the heater being used for heating generation high temperature mummification gas as gas regulator, and carries out denitration process；
Second step, the gas obtained after the first step being completed enters spray tower and carries out contacting with slurry and realize slurry mummification, to obtain dry mash；
3rd step, enters spray column by remaining gas after second step and carries out desulfurization and dedusting, and purified gas discharges, and reacted liquid and mud powder are then discharged into sedimentation tank as raw material.
Such scheme utilizes the tail gas with uniform temperature as the regulator of high-temperature gas in slurry high temperature mummification link, not only improves the utilization rate of kiln tail gas, it is achieved recycle the theory of environmental protection, and can be energy-efficient, reaches to save the effect of the energy and environmental protection.Meanwhile, by above three step the inventive method can the effective tail gas of purified treatment kiln make its discharge up to standard, the method processing cost is low, high treating effect and the problem that do not have secondary pollution.
More specifically, the tail gas discharged by kiln described in the first step adds in the heater being used for heating generation high temperature mummification gas as gas regulator, and carry out denitration process, refer to: the tail gas of kiln is joined in heater, now the gas temperature in heater is 1000～1200 DEG C, and addition ammonia carries out denitration at this moment；Through the addition of kiln tail gas and ammonia, heater is discharged the temperature of gas and is dropped to 700～900 DEG C.
Exhaust gas treating method of the present invention has two advantages, one is that the tail gas that kiln is discharged in Production of Ceramics process generally has 200～300 DEG C, contrast with the method for traditional slurry high temperature mummification, the present invention rationally reclaims and utilizes the heat energy of tail gas, the tail gas that temperature is 200～300 DEG C is mixed with the high-temperature gas that temperature is 1000～1200 DEG C, and add ammonia and obtain the gas of proper temperature slurry is carried out high temperature mummification, without being heated to by the gas in heater in current method, 1200～1500 DEG C of use carry out slurry high temperature mummification again through fresh air adjustment to suitable temperature.The method can reduce the consumption of heat energy in heater, reaches energy-efficient, to improve waste gas utilization rate effect.Another is that kiln tail gas carries out denitration in high temperature environments, treatment effect better and processing cost be relatively low, need to realize tail gas heating by currently used method, kiln tail gas is added heater by this method, utilize the high temperature of gas in heater to be directly realized by high temperature denitration, also achieve a large amount of saving of the energy.
Described heater is air stove, and the gas in air stove is heated to 1000～1200 DEG C by coal water slurry fuel.
In second step, the gas that the described first step obtains after completing refers to the gas that temperature is 700～900 DEG C.Gas is the high temperature mummification of the applicable slurry of temperature of 700～900 DEG C.
In the third step, after described second step, remaining gas enters spray column and carries out contacting reacting with spraying alkali liquor and shower water, it is achieved the desulfurization of gas and dedusting also discharge.
After described second step, remaining gas refers to the gas with mummification dust.
Tail gas after denitration can comprehensively be processed by the processing method of the present invention together with the gas of dust after with mummification, the production technology contrast of kiln tail gas and mummification slurry residual gas purified treatment respectively in producing with traditional ceramics, improve production efficiency and save production cost.Gas effectively can be carried out desulfurization and dedusting by spray alkali liquor and shower water, and improves desulfuration efficiency and the efficiency of dust collection of gas.
In the third step, after second step, the liquid after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank to the inventive method, and circulates as shower water catalytic with gas.Liquid can enter the blood circulation of spray column and recycle as shower water.
In the third step, after second step, the mud powder after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank to the inventive method, and carries out squeezing and use as raw material.Reacted mud powder uses as feedstock circulation also by post-production.
Compared with prior art, the invention have the advantages that and beneficial effect:
1 and traditional slurry high temperature mummification method contrast, the present invention rationally reclaims and utilizes the heat energy of tail gas, utilize and there is the tail gas of uniform temperature and the high-temperature gas that temperature is 1000～1200 DEG C be mixed and added into ammonia and neutralize the gas obtained and carry out slurry high temperature mummification, not only improve waste gas utilization rate, and energy-efficient and environmental protection effect can be reached.
2, the tail gas of kiln is joined in heater and adds ammonia and carries out denitration by the inventive method, utilizes the high temperature of gas in heater to be directly realized by high temperature denitration, also achieves a large amount of saving of the energy.
3, the production technology contrast separated with traditional ceramics, tail gas after denitration can comprehensively be processed by the processing method of the present invention together with the gas of dust after with mummification, the production technology contrast of kiln tail gas and mummification slurry residual gas purified treatment respectively in producing with traditional ceramics, improve production efficiency and save production cost.
4, the processing method of kiln tail gas of the present invention can the effective tail gas of purified treatment kiln make its discharge up to standard, the method processing cost is low, high treating effect and do not have the problem of secondary pollution, is conducive to promotion and application in the industrial production.
Accompanying drawing explanation
Fig. 1 is the flow chart of kiln exhaust gas treating method of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail with detailed description of the invention.
Embodiment one
The present embodiment with the gas temperature in air stove for 1000 DEG C, in tail gas, 1000 DEG C of high-temperature gases and ammonia and rear temperature drop to 700 DEG C for example to being illustrated below.
The flow chart of kiln exhaust gas treating method of the present invention, as it is shown in figure 1, the processing method of kiln tail gas of the present invention, comprises the following steps:
The first step, the tail gas discharged by kiln adds in the air stove being used for heating generation high temperature mummification gas as gas regulator, and now the gas temperature in air stove is heated to 1000 DEG C by coal water slurry fuel；And add ammonia at this moment and carry out tail gas denitration；Through the addition of kiln tail gas and ammonia, the temperature of hot blast furnace exhaust gas drops to 700 DEG C.
Second step, obtains gas that temperature is 700 DEG C and enters spray tower and carry out contacting with slurry and realize slurry mummification, to obtain dry mash after the first step being completed.
3rd step, enters spray column by tail gas remaining after second step with the gas with mummification dust and carries out contacting reacting with spray alkali liquor and shower water, it is achieved the desulfurization of gas and dedusting, purified gas discharges；After second step, the liquid after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank, and circulates as the catalytic shower water of the gas with tail gas with dust；After second step, the mud powder after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank, and carries out squeezing and use as raw material.The production technology contrast separated with traditional ceramics, tail gas after denitration can comprehensively be processed by the processing method of the present invention together with the gas of dust after with mummification, the production technology contrast of kiln tail gas and mummification slurry residual gas purified treatment respectively in producing with traditional ceramics, improve production efficiency and save production cost.
The processing method of kiln tail gas of the present invention can the effective tail gas of purified treatment kiln make its discharge up to standard, the method processing cost is low, high treating effect and do not have the problem of secondary pollution, is conducive to promotion and application in the industrial production.The method is in the process purifying kiln tail gas simultaneously, rationally reclaim and utilize the heat energy of tail gas to obtain dry mash and raw material, the not only effect of raising purified treatment kiln tail gas, but also improve the utilization rate of kiln tail gas, thus reaching to save the effect of the energy and environmental protection.
Contrast with the method for traditional slurry high temperature mummification, the present invention rationally reclaims and utilizes the heat energy of tail gas, utilize and there is the tail gas of uniform temperature and the high-temperature gas that temperature is 1000 DEG C be mixed and added into ammonia and neutralize the gas that temperature is 700 DEG C obtained and carry out slurry high temperature mummification, not only improve waste gas utilization rate, and energy-efficient and environmental protection effect can be reached.Meanwhile, the tail gas of kiln is joined in heater and adds ammonia and carries out denitration by the inventive method, utilizes the high temperature of gas in heater to be directly realized by high temperature denitration, also achieves a large amount of saving of the energy.
Embodiment two
The present embodiment with the gas temperature in air stove for 1100 DEG C, in tail gas, 1100 DEG C of high-temperature gases and ammonia and rear temperature drop to 800 DEG C for example to being illustrated below.
The flow chart of kiln exhaust gas treating method of the present invention, as it is shown in figure 1, the processing method of kiln tail gas of the present invention, comprises the following steps:
The first step, the tail gas discharged by kiln adds in the air stove being used for heating generation high temperature mummification gas as gas regulator, and now the gas temperature in air stove is heated to 1100 DEG C by coal water slurry fuel；And add ammonia at this moment and carry out tail gas denitration；Through the addition of kiln tail gas and ammonia, the temperature of hot blast furnace exhaust gas drops to 800 DEG C.
Second step, obtains gas that temperature is 800 DEG C and enters spray tower and carry out contacting with slurry and realize slurry mummification, to obtain dry mash after the first step being completed.
3rd step, enters spray column by tail gas remaining after second step with the gas with mummification dust and carries out contacting reacting with spray alkali liquor and shower water, it is achieved the desulfurization of gas and dedusting, purified gas discharges；After second step, the liquid after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank, and circulates as the catalytic shower water of the gas with tail gas with dust；After second step, the mud powder after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank, and carries out squeezing and use as raw material.The production technology contrast separated with traditional ceramics, tail gas after denitration can comprehensively be processed by the processing method of the present invention together with the gas of dust after with mummification, the production technology contrast of kiln tail gas and mummification slurry residual gas purified treatment respectively in producing with traditional ceramics, improve production efficiency and save production cost.
The processing method of kiln tail gas of the present invention can the effective tail gas of purified treatment kiln make its discharge up to standard, the method processing cost is low, high treating effect and do not have the problem of secondary pollution, is conducive to promotion and application in the industrial production.The method is in the process purifying kiln tail gas simultaneously, rationally reclaim and utilize the heat energy of tail gas to obtain dry mash and raw material, the not only effect of raising purified treatment kiln tail gas, but also improve the utilization rate of kiln tail gas, thus reaching to save the effect of the energy and environmental protection.
Contrast with the method for traditional slurry high temperature mummification, the present invention rationally reclaims and utilizes the heat energy of tail gas, utilize and there is the tail gas of uniform temperature and the high-temperature gas that temperature is 1100 DEG C be mixed and added into ammonia and neutralize the gas that temperature is 800 DEG C obtained and carry out slurry high temperature mummification, not only improve waste gas utilization rate, and energy-efficient and environmental protection effect can be reached.Meanwhile, the tail gas of kiln is joined in heater and adds ammonia and carries out denitration by the inventive method, utilizes the high temperature of gas in heater to be directly realized by high temperature denitration, also achieves a large amount of saving of the energy.
Embodiment three
The present embodiment with the gas temperature in air stove for 1200 DEG C, in tail gas, 1200 DEG C of high-temperature gases and ammonia and rear temperature drop to 900 DEG C for example to being illustrated below.
The flow chart of kiln exhaust gas treating method of the present invention, as it is shown in figure 1, the processing method of kiln tail gas of the present invention, comprises the following steps:
The first step, the tail gas discharged by kiln adds in the air stove being used for heating generation high temperature mummification gas as gas regulator, and now the gas temperature in air stove is heated to 1200 DEG C by coal water slurry fuel；And add ammonia at this moment and carry out tail gas denitration；Through the addition of kiln tail gas and ammonia, the temperature of hot blast furnace exhaust gas drops to 900 DEG C.
Second step, obtains gas that temperature is 900 DEG C and enters spray tower and carry out contacting with slurry and realize slurry mummification, to obtain dry mash after the first step being completed.
3rd step, enters spray column by tail gas remaining after second step with the gas with mummification dust and carries out contacting reacting with spray alkali liquor and shower water, it is achieved the desulfurization of gas and dedusting, purified gas discharges；After second step, the liquid after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank, and circulates as the catalytic shower water of the gas with tail gas with dust；After second step, the mud powder after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank, and carries out squeezing and use as raw material.The production technology contrast separated with traditional ceramics, tail gas after denitration can comprehensively be processed by the processing method of the present invention together with the gas of dust after with mummification, the production technology contrast of kiln tail gas and mummification slurry residual gas purified treatment respectively in producing with traditional ceramics, improve production efficiency and save production cost.
The processing method of kiln tail gas of the present invention can the effective tail gas of purified treatment kiln make its discharge up to standard, the method processing cost is low, high treating effect and do not have the problem of secondary pollution, is conducive to promotion and application in the industrial production.The method is in the process purifying kiln tail gas simultaneously, rationally reclaim and utilize the heat energy of tail gas to obtain dry mash and raw material, the not only effect of raising purified treatment kiln tail gas, but also improve the utilization rate of kiln tail gas, thus reaching to save the effect of the energy and environmental protection.
Contrast with the method for traditional slurry high temperature mummification, the present invention rationally reclaims and utilizes the heat energy of tail gas, utilize and there is the tail gas of uniform temperature and the high-temperature gas that temperature is 1200 DEG C be mixed and added into ammonia and neutralize the gas that temperature is 900 DEG C obtained and carry out slurry high temperature mummification, not only improve waste gas utilization rate, and energy-efficient and environmental protection effect can be reached.Meanwhile, the tail gas of kiln is joined in heater and adds ammonia and carries out denitration by the inventive method, utilizes the high temperature of gas in heater to be directly realized by high temperature denitration, also achieves a large amount of saving of the energy.
Above-described embodiment is the present invention preferably embodiment; but embodiments of the present invention are also not restricted to the described embodiments; the change made under other any spirit without departing from the present invention and principle, modification, replacement, combination, simplification; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. a kiln exhaust gas treating method, it is characterised in that: comprise the following steps:
The first step, the tail gas discharged by kiln adds in the heater being used for heating generation high temperature mummification gas as gas regulator, and carries out denitration process；
Second step, the gas obtained after the first step being completed enters spray tower and carries out contacting with slurry and realize slurry mummification, to obtain dry mash；
3rd step, enters spray column by remaining gas after second step and carries out desulfurization and dedusting, and purified gas discharges, and reacted liquid and mud powder are then discharged into sedimentation tank as raw material；
The tail gas discharged by kiln described in the first step adds in the heater being used for heating generation high temperature mummification gas as gas regulator, and carry out denitration process, refer to: the tail gas of kiln is joined in heater, now the gas temperature in heater is 1000～1200 DEG C, and addition ammonia carries out denitration at this moment；Through the addition of kiln tail gas and ammonia, heater is discharged the temperature of gas and is dropped to 700～900 DEG C.
2. kiln exhaust gas treating method according to claim 1, it is characterised in that: described heater is air stove, and the gas in air stove is heated to 1000～1200 DEG C by coal water slurry fuel.
3. kiln exhaust gas treating method according to claim 1, it is characterised in that: in second step, the gas that the described first step obtains after completing refers to the gas that temperature is 700～900 DEG C.
4. kiln exhaust gas treating method according to claim 1, it is characterised in that: in the third step, after described second step, remaining gas enters spray column and carries out contacting reacting with spraying alkali liquor and shower water, it is achieved the desulfurization of gas and dedusting also discharge.
5. kiln exhaust gas treating method according to claim 4, it is characterised in that: after described second step, remaining gas refers to the gas with mummification dust.
6. kiln exhaust gas treating method according to claim 1, it is characterised in that: in the third step, after second step, the liquid after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank, and circulates as shower water catalytic with gas.
7. kiln exhaust gas treating method according to claim 1, it is characterised in that: in the third step, after second step, the mud powder after remaining gas and spray alkali liquor and shower water haptoreaction is discharged into sedimentation tank, and carries out squeezing and use as raw material.
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| CN104792157A (en) * | 2015-03-31 | 2015-07-22 | 佛山市三水宏源陶瓷企业有限公司 | Low-emission ceramic roller kiln |
| CN106066046B (en) * | 2016-05-08 | 2018-10-09 | 宁波高新区世代能源科技有限公司 | The desulphurization denitration dust removal method of liquefied gas used for combustion |
| CN106066045B (en) * | 2016-05-08 | 2018-10-09 | 宁波高新区世代能源科技有限公司 | The desulphurization denitration dedusting intelligence control system of liquefied gas used for combustion |
| CN106051810B (en) * | 2016-05-08 | 2018-10-09 | 宁波高新区世代能源科技有限公司 | The desulphurization denitration dedusting complete set of equipments of liquefied gas used for combustion |
| CN106474851A (en) * | 2016-08-20 | 2017-03-08 | 苏州舒跃碳吸附剂有限公司 | A kind of coal-burning utilities cleaner |
| CN115727341B (en) * | 2022-11-25 | 2023-08-29 | 江西陶瓷工艺美术职业技术学院 | Ceramic kiln tail gas treatment device and treatment process thereof |
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