CN213294971U - Contain salt buck and wash processing system - Google Patents
Contain salt buck and wash processing system Download PDFInfo
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- CN213294971U CN213294971U CN202021593215.6U CN202021593215U CN213294971U CN 213294971 U CN213294971 U CN 213294971U CN 202021593215 U CN202021593215 U CN 202021593215U CN 213294971 U CN213294971 U CN 213294971U
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Abstract
The utility model discloses a contain salt buck and wash processing system, this system includes: ash bin (contain salt ash bin), multistage countercurrent water washing device and quenching and tempering device. The ash bin is connected with a multi-stage countercurrent water washing device through a first pipeline. And the conditioning device is connected with the multi-stage countercurrent water washing device through a second pipeline. And the tempering device is also connected with a tempering agent conveying pipeline and a salt-containing wastewater conveying pipeline. The utility model discloses a salt-containing water replaces the running water to wash, when chlorine, alkali metal effectively got rid of in the assurance salt-containing ash, reduces the total amount of high salt ash washing waste water from the source, reaches energy saving and emission reduction, treats useless purpose with useless.
Description
Technical Field
The utility model relates to a contain salt buck and wash device, concretely relates to contain salt buck and wash processing system belongs to the solid useless processing technology field of steel blast furnace high salt.
Background
With the continuous promotion of a 'producing city integration' development mode, the steel industry gradually evolves towards a 'wastewater zero discharge, waste gas ultra-low discharge and solid waste non-discharge' coordinated mode. At present, the solid waste generated in the steel industry mainly contains iron, and most of the solid waste is subjected to internal circulation treatment in a steel plant through sintering, a blast furnace, a rotary kiln and other high-temperature furnaces. However, part of high-salt solid wastes (such as three-field sintering ash, four-field sintering ash, bag-type blast furnace dust, etc.) contain more alkali and metal chloride, and if the wastes are directly returned to high-temperature furnaces such as sintering furnaces, rotary kilns, etc., the wastes can cause equipment corrosion and cause kiln caking, etc.
At present, aiming at high-salt solid waste generated by steel plants, alkali and metal chloride are usually removed by adopting a water washing mode, and a method for leaching blast furnace gas ash by using tap water is reported in Chinese patent CN103435073A, namely a method for producing potassium chloride by using blast furnace gas ash of steel enterprises, so that the content of potassium and chlorine in the blast furnace gas ash is greatly reduced, and the leachate is used for preparing potassium chloride and sodium chloride to improve the economy. Chinese patent CN101234766A method for producing potassium chloride by using sintered electric precipitator dust of iron and steel enterprises reports a method for leaching sintered dust by using a compound solution of tap water and an SDD inhibitor, wherein the leaching rate of potassium and sodium can reach 95-99.5%, and high-salt solid waste after washing and leaching is dehydrated and then can be returned to high-temperature furnaces such as sintering furnaces, rotary kilns and the like for further treatment. However, in the process of leaching high-salt solid waste by washing, a large amount of high-salt leaching waste water is generated and can be discharged after secondary treatment, thereby causing secondary pollution.
Considering that other processes in a steel plant generate salt-containing wastewater (such as wet desulphurization wastewater, activated carbon flue gas purification washing wastewater and the like), the salt-containing wastewater also needs to be treated before being discharged. And the main anion components in the salt-containing wastewater are similar to those in the high-salt leaching wastewater, and cations in the salt-containing wastewater have the effect of removing anions in the high-salt leaching wastewater. Therefore, if the salt-containing wastewater is used for replacing tap water to leach the high-salt solid waste, the total amount of the high-salt wastewater can be reduced, and the synergistic treatment of the salt-containing wastewater and the high-salt solid waste is realized. Chinese patent CN102992464B, "a disposal method of high-salt wastewater and waste incineration fly ash", reports a method for washing waste incineration fly ash by using high-salt wastewater, and realizes the cooperative disposal of solid and liquid wastes in the waste disposal industry by using water resources of the high-salt wastewater. Because the quality of the high-salt solid waste of steel and iron, the fly ash from waste incineration and the high-salt waste water in the waste industry are greatly different from the quality of the salt-containing waste water generated in other processes of the steel and iron plant, reference cannot be simply made, further research and optimization are needed, and no relevant research report exists at home and abroad at present.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art, the utility model provides an utilize the salt waste water that contains that other processes of steel and iron plant produced as the water source's of the solid useless (containing salt ash) washing of high salt buck to wash processing system. The advantages are that: on one hand, the usage amount of tap water (industrial water) can be reduced, and the yield of wastewater is reduced; and meanwhile, anions in the high-salinity leaching wastewater are removed by using cations in the saline wastewater, so that the purpose of treating the wastewater with waste is realized. On the other hand, through increasing the quenching and tempering device, change the composition that contains salt waste water, improve the washing treatment effect of high salt solid waste (containing salt ash). The system can reduce the treatment capacity of subsequent wastewater from the source, reduce the wastewater treatment cost and realize the reutilization of waste resources.
In order to achieve the above object, the utility model discloses the technical scheme who adopts specifically as follows:
a brine wash treatment system, comprising: ash bin (contain salt ash bin), multistage countercurrent water washing device and quenching and tempering device. The ash bin is connected with a multi-stage countercurrent water washing device through a first pipeline. And the conditioning device is connected with the multi-stage countercurrent water washing device through a second pipeline. And the tempering device is also connected with a tempering agent conveying pipeline and a salt-containing wastewater conveying pipeline.
Preferably, the modifier conveying pipeline comprises a liquid caustic soda conveying pipeline and/or a PAC conveying pipeline. The salt-containing wastewater conveying pipeline is a wet desulphurization salt-containing wastewater conveying pipeline and/or an activated carbon flue gas purification washing salt-containing wastewater conveying pipeline.
Preferably, the multistage countercurrent water washing device comprises a first-stage water washing device, a second-stage water washing device and a third-stage water washing device. And the conditioning device is connected to the primary water washing device through a second pipeline. The first-stage water washing device is connected to the second-stage water washing device through a third pipeline. And the second-stage water washing device is connected to the third-stage water washing device through a fourth pipeline. And the third-stage water washing device is connected to the second-stage water washing device through a fifth pipeline.
Preferably, the system also comprises a primary filter pressing device, a secondary filter pressing device and a tertiary filter pressing device. The primary filter pressing device is arranged on the third pipeline. And the secondary filter pressing device is arranged on the fourth pipeline. And the third-stage filter pressing device is arranged on the fifth pipeline.
Preferably, the system also comprises a first-stage water washing tank, a second-stage water washing tank and a third-stage water washing tank. And a first bypass pipeline is led out from a third pipeline positioned at the downstream of the first-stage filter pressing device and is connected to the first-stage water washing tank. And a second bypass pipeline is led out from a fourth pipeline positioned at the downstream of the second-stage filter pressing device and is connected to the second-stage water washing tank. The third-stage washing tank is arranged on a fifth pipeline positioned at the downstream of the third-stage filter pressing device.
Preferably, the system further comprises a screw conveyor. The spiral conveying device is arranged on the first pipeline.
Preferably, the system further comprises a waste water storage tank. The first-stage washing tank is connected to the sewage storage tank through a sixth pipeline.
Preferably, the secondary water washing tank is further connected to the primary water washing device through a seventh pipe.
Preferably, the system further comprises a filter cake storage tank. And the third-stage filter pressing device is connected to the filter cake storage tank through an eighth pipeline. Preferably, the eighth pipe is a bypass pipe of the fifth pipe.
Preferably, the third washing device is further connected with an industrial water conveying pipeline.
In the prior art, aiming at high-salt solid waste (mainly containing iron) generated in steel plants, most of the solid waste is subjected to internal circulation treatment in the steel plants through sintering, blast furnaces, rotary kilns and other high-temperature furnaces. However, part of high-salt solid wastes (such as three-field sintering ash, four-field sintering ash, bag-type blast furnace dust, etc.) contain more alkali and chlorine metals, and if the wastes are directly returned to high-temperature furnaces such as sintering furnaces, rotary kilns, etc., the wastes can cause equipment corrosion and cause kiln caking, etc. Therefore, the alkali and chlorine metal are usually removed from the part of the high-salinity solid waste by water washing. Therefore, a large amount of high-salt leaching wastewater is generated, and a large amount of tap water (industrial water) is consumed, so that the water resource is greatly consumed. Further, the high-salt leaching wastewater can be discharged after secondary treatment, which causes secondary pollution.
The utility model discloses in, can produce through other processes with the steel plant and contain salt waste water (like wet flue gas desulfurization waste water, active carbon gas cleaning washing waste water etc.) and replace the running water and carry out the leaching that the high salt was useless admittedly, and then reduce the use amount of running water, reduced the total amount that the high salt leached out waste water, realize containing salt waste water and the purpose of the useless cooperation of handling of high salt solid.
The utility model discloses in, adopt the multistage countercurrent washing mode of establishing ties (in the utility model discloses in, the blast furnace dry process ash and the sintering dust removal that contains the salt ash finger, wherein the water ash mass ratio of the first order washing of blast furnace dry process ash washing, second grade washing, tertiary washing is 1:1 ~ 3, preferably 1: 1. the one-level water ash mass ratio of sintering dust removal washing is 1:2 ~ 4, preferably 1:3 ~ 4. the second grade water ash mass ratio of sintering dust removal ash washing is 1:2 ~ 4, preferably 1:1 ~ 2. the tertiary water ash mass ratio of sintering dust removal ash washing is 1:1 ~ 2, preferably 1: 1). The first-stage washing water source containing the salt ash is salt-containing water after quenching and tempering and second-stage filter pressing water production, the salt ash is dewatered through first-stage filter pressing after the first-stage washing is finished, first-stage filtrate is discharged to a sewage storage tank (discharged after a sewage treatment process), and filter residues enter second-stage washing. And a second-stage washing water source containing the salt ash is third-stage filter pressing water production, after the second-stage washing is finished, the second-stage filter pressing is used for dewatering, second-stage filtrate is conveyed back to the first-stage washing containing the salt ash, and filter residues enter the third-stage washing. And a third-stage washing water source containing the salt ash is industrial water, after the third-stage washing is finished, the third-stage washing water is dehydrated through third-stage filter pressing, the third filtrate is discharged to the second-stage washing water for recycling, and filter residues are discharged from the system and transported outside for disposal. The salt-containing water after quality modulation is used as a water source of primary washing, and a mode of multi-stage countercurrent washing (secondary filter-pressing filtrate returns to the primary washing, and tertiary filter-pressing filtrate returns to the secondary washing) is adopted, so that the use amount of tap water during washing is further reduced (tap water (industrial water) is replaced by the salt-containing water after quality modulation and the secondary filter-pressing filtrate, and even the tap water is not needed to be used during the primary washing, the generation of waste water amount is greatly reduced), and the comprehensive treatment of waste water in different processes in the steel technology is realized by a mode of treating waste with waste.
The utility model discloses in, mainly contain calcium ion, chlorine, sulfate radical and sulfite ion in the wet flue gas desulfurization waste water, active carbon gas cleaning washing waste water mainly contains metal ion, chlorine, sulfate radical and sulfite ion. The two kinds of waste water are high-chlorine low-sulfate radical waste water. And the water for leaching the high-salt ash by adopting the tap water is also complex wastewater with high chlorine and low sulfate radical, and through concentration comparison analysis, the concentration of each ion in the leaching wastewater of the high-salt ash is far higher than the corresponding ion concentration in the wet desulphurization wastewater and the activated carbon flue gas purification washing wastewater. Therefore, the leachate of high-salinity ash is prepared by adopting saline water (wet desulphurization wastewater and activated carbon flue gas purification washing wastewater), so that the final water quality is not greatly changed, the aim of treating waste by waste can be fulfilled, and the final wastewater yield is reduced.
The utility model discloses in, adopt PAC (polyaluminium chloride) to carry out quenching and tempering with salt solution (PAC's addition is for containing 0.5 ~ 1 times of salt aquatic calcium ion concentration), aim at utilizes PAC's the effect of helping to congeal, improves washing ash's cohesion to do benefit to the filter-pressing at the back. In addition, aluminum in the PAC reacts with calcium in the saline water and sulfate radicals in the ash washing water to generate insoluble precipitates, so that the concentration of the sulfate radicals in the final effluent is reduced, and the difficulty of the subsequent salt separation crystallization operation is reduced. Furthermore, the saline water is also subjected to quenching and tempering treatment by using an alkali liquor (the alkali liquor is one or more of sodium hydroxide, potassium hydroxide and lithium hydroxide) so as to prevent acidic water from leaching a large amount of valuable metals in the high-salinity ash, and the water obtained by leaching the high-salinity ash with tap water is weakly acidic. Therefore, a certain amount of alkali needs to be added into the saline water to adjust the saline water to be alkalescent (the pH value of the saline water is adjusted to 7-9, preferably 7.2-8.8) so as to prevent valuable metals such as iron and the like from being leached out.
The utility model discloses in, the mode that adopts tertiary step filter-pressing filters washing filter residue at different levels. Conventional filter pressing methods often only consider cake dewatering to be of concern, with higher dewatering being considered better. But for practical engineering, the three-stage washing efficiency is higher, and the chlorine content in the final filter residue can be ensured to meet the limit requirement only by improving the last stage of filter pressing. And the dehydration rate of the first two stages of filter pressing is adjusted, so that the discharge of the total amount of wastewater can be reduced while the chlorine and alkali metals in the high-salt ash are effectively removed. The utility model discloses in, one-level filter-pressing dehydration, the dehydration rate control is at 20 ~ 60%, preferably 40 ~ 50%. And in the secondary filter pressing dehydration, the dehydration rate is controlled to be 20-60%, and the preferable dehydration rate is 40-50%. And the dehydration rate of the three-stage filter pressing dehydration is controlled to be 70-90%, and preferably 80-85%.
Compared with the prior art, the utility model discloses a beneficial technological effect as follows:
1. the utility model discloses an effectively utilize the nature of salt-containing water, change the washing scheme that contains salt ash (high salt ash), when chlorine, alkali metal effectively got rid of in the assurance contains salt ash (blast furnace dry process ash and sintering dust removal ash), reduce the total amount of high salt ash washing waste water from the source, reach the purpose of treating waste with the waste.
2. The utility model discloses a carry out the quenching and tempering to raw water (contain salt waste water) when adopting liquid caustic soda washing, prevent that acidity is too high and make valuable metal leach for can remain of valuable metal among the washing process, can also reduce the sulfate radical concentration of final high salt ash washing waste water.
3. The utility model discloses chlorine, alkali metal content in the high salt ash in the reducible system exhaust waste water are favorable to retrieving high-purity sodium chloride and potassium chloride in this waste water in the follow-up waste water treatment process.
Drawings
FIG. 1 is a schematic structural view of the saline ash washing treatment system of the present invention.
Fig. 2 is a schematic structural view of the multistage countercurrent water washing device of the present invention.
FIG. 3 is a flow chart of a process of applying the conventional water washing in example 1.
FIG. 4 is a flow chart of a process employing the conventional cascade pressure filtration of example 1.
FIG. 5 is a process flow diagram using example 10 in application example 1.
Reference numerals: 1: an ash bin; 2: a multi-stage counter-current water washing device; 3: a conditioning device; 4: a screw conveyor; 201: a first-stage water washing device; 202: a secondary water washing device; 203: a third-stage washing device; 204: a primary filter pressing device; 205: a secondary filter pressing device; 206: a third stage filter pressing device; 207: a first-stage water washing tank; 208: a second stage water washing tank; 209: a third-stage washing tank; 210: a sewage storage tank; 211: a filter cake storage tank; 301: a conditioning agent delivery pipeline; 302: a salt-containing wastewater conveying pipeline; l1: a first conduit; l2: a second conduit; l3: a third pipeline; l4: a fourth conduit; l5: a fifth pipeline; l6: a sixth pipeline; l7: a seventh pipe; l8: an eighth conduit; l9: an industrial water delivery pipeline; p1: a first bypass conduit; p2: a second bypass conduit.
Detailed Description
The technical solution of the present invention is illustrated below, and the claimed scope of the present invention includes, but is not limited to, the following examples.
A brine wash treatment system, comprising: an ash bin 1, a multi-stage countercurrent water washing device 2 and a conditioning device 3. The ash bin 1 is connected with a multistage counter-current water washing device 2 through a first pipeline L1. The conditioning device 3 is connected with the multi-stage countercurrent water washing device 2 through a second pipeline L2. The tempering device 3 is also connected with a tempering agent conveying pipeline 301 and a salt-containing wastewater conveying pipeline 302.
Preferably, the modifying agent conveying pipeline 301 comprises a liquid caustic soda conveying pipeline and/or a PAC conveying pipeline. The salt-containing wastewater conveying pipeline 302 is a wet desulphurization salt-containing wastewater conveying pipeline and/or an activated carbon flue gas purification washing salt-containing wastewater conveying pipeline.
Preferably, the multistage counter-current water washing apparatus 2 includes a primary water washing apparatus 201, a secondary water washing apparatus 202, and a tertiary water washing apparatus 203. The tempering device 3 is connected to the primary water washing device 201 through a second pipeline L2. The primary water washing apparatus 201 is connected to the secondary water washing apparatus 202 through a third pipe L3. The secondary water washing apparatus 202 is connected to the tertiary water washing apparatus 203 through a fourth pipe L4. The tertiary water-washing device 203 is connected to the secondary water-washing device 202 through a fifth pipe L5.
Preferably, the system further comprises a primary filter press 204, a secondary filter press 205, and a tertiary filter press 206. The primary filter press apparatus 204 is disposed in a third line L3. The secondary filter press device 205 is disposed on a fourth line L4. The tertiary filter pressing device 206 is disposed on a fifth conduit L5.
Preferably, the system further comprises a first-stage water washing tank 207, a second-stage water washing tank 208 and a third-stage water washing tank 209. A first bypass pipeline P1 is led out from the third pipeline L3 positioned at the downstream of the primary filter pressing device 204 and is connected to the primary water washing tank 207. A second bypass line P2 leads from the fourth line L4 downstream of the secondary filter press apparatus 205 to the secondary water wash tank 208. The tertiary water wash tank 209 is disposed in a fifth conduit L5 downstream of the tertiary filter press apparatus 206.
Preferably, the system further comprises a screw conveyor 4. The screw conveyor 4 is provided on the first pipe L1.
Preferably, the system further includes a waste water storage tank 210. The primary water-washing tank 207 is connected to the sewage storage tank 210 through a sixth pipe L6.
Preferably, the secondary water washing tank 208 is also connected to the primary water washing device 201 through a seventh pipe L7.
Preferably, the system further comprises a cake reservoir 211. The third stage pressure filtration device 206 is connected to the cake holding tank 211 via an eighth line L8. Preferably, the eighth conduit L8 is a bypass conduit of the fifth conduit L5.
Preferably, an industrial water delivery pipe L9 is further connected to the tertiary washing device 203.
Example 1
As shown in FIG. 1, a brine grey water wash treatment system, comprising: an ash bin 1, a multi-stage countercurrent water washing device 2 and a conditioning device 3. The ash bin 1 is connected with a multistage counter-current water washing device 2 through a first pipeline L1. The conditioning device 3 is connected with the multi-stage countercurrent water washing device 2 through a second pipeline L2. The tempering device 3 is also connected with a tempering agent conveying pipeline 301 and a salt-containing wastewater conveying pipeline 302.
Example 2
Example 1 was repeated except that the conditioner delivery conduit 301 included a liquid caustic delivery conduit and a PAC delivery conduit. The salt-containing wastewater conveying pipeline 302 is a wet desulphurization salt-containing wastewater conveying pipeline and an activated carbon flue gas purification washing salt-containing wastewater conveying pipeline.
Example 3
Example 2 was repeated, and as shown in fig. 2, the multistage countercurrent water washing apparatus 2 comprises a primary water washing apparatus 201, a secondary water washing apparatus 202, and a tertiary water washing apparatus 203. The tempering device 3 is connected to the primary water washing device 201 through a second pipeline L2. The primary water washing apparatus 201 is connected to the secondary water washing apparatus 202 through a third pipe L3. The secondary water washing apparatus 202 is connected to the tertiary water washing apparatus 203 through a fourth pipe L4. The tertiary water-washing device 203 is connected to the secondary water-washing device 202 through a fifth pipe L5.
Example 4
Example 3 was repeated except that the system further included a primary filter press 204, a secondary filter press 205, and a tertiary filter press 206. The primary filter press apparatus 204 is disposed in a third line L3. The secondary filter press device 205 is disposed on a fourth line L4. The tertiary filter pressing device 206 is disposed on a fifth conduit L5.
Example 5
Example 4 was repeated except that the system further included a primary water-washing tank 207, a secondary water-washing tank 208 and a tertiary water-washing tank 209. A first bypass pipeline P1 is led out from the third pipeline L3 positioned at the downstream of the primary filter pressing device 204 and is connected to the primary water washing tank 207. A second bypass line P2 leads from the fourth line L4 downstream of the secondary filter press apparatus 205 to the secondary water wash tank 208. The tertiary water wash tank 209 is disposed in a fifth conduit L5 downstream of the tertiary filter press apparatus 206.
Example 6
Example 5 was repeated except that the system further included a screw conveyor 4. The screw conveyor 4 is provided on the first pipe L1.
Example 7
Example 6 is repeated except that the system further comprises a waste water storage tank 210. The primary water-washing tank 207 is connected to the sewage storage tank 210 through a sixth pipe L6.
Example 8
Example 7 was repeated except that the secondary water-washing tank 208 was also connected to the primary water-washing apparatus 201 through a seventh pipe L7.
Example 9
Example 8 was repeated except that the system also included a cake reservoir 211. The third stage pressure filtration device 206 is connected to the cake holding tank 211 via an eighth line L8.
Example 10
Example 9 is repeated, except that the eighth line L8 is a bypass line of the fifth line L5.
Example 11
Example 10 was repeated except that an industrial water supply line L9 was further connected to the tertiary water washing apparatus 203.
Application example 1
Adopt respectively to adopt traditional washing process, traditional step filter-pressing technology and the utility model discloses embodiment 10 the system is washed containing salt ash (high salt ash) respectively, and wherein, the water ash mass ratio of washing at different levels is 1:1, and total ash volume is 10 t/h.
The traditional water washing process specifically comprises the following steps: see figure 3 of the specification. Conveying the high-salt ash into a primary washing device through a screw conveying device, performing primary washing by adopting 10t of water (from a secondary washing tank), performing primary filter pressing, and controlling the water content of a primary filter cake to be 15% (based on the total mass of the high-salt ash), so as to obtain 8.5t of sewage (conveyed to a sewage storage tank) and a primary filter cake with 1.5t of water; conveying the first-stage filter cake into a second-stage washing device, washing with 10t of water (from a third-stage washing tank), performing second-stage filter pressing, and controlling the water content of the second-stage filter cake to be 15% (based on the total mass of the added high-salt ash), so as to obtain 10t of second-stage washed water (conveyed to the second-stage washing tank) and a second-stage filter cake with 1.5t of water residues; and (3) conveying the second-stage filter cake into a third-stage washing device, carrying out third-stage washing by adopting 10t of industrial water, then carrying out third-stage filter pressing, controlling the water content of the third-stage filter cake to be 15% (based on the total mass of the added high-salt ash), and obtaining 10t of third-stage washed water (conveyed to a third-stage washing tank) and the third-stage filter cake with 1.5t of water remained (transported to an outward transportation disposal).
The traditional cascade filter pressing process specifically comprises the following steps: see figure 4 of the specification. Conveying the high-salt ash into a primary washing device through a screw conveying device, performing primary washing by adopting 10t of water (from a secondary washing tank), performing primary filter pressing, and controlling the water content of a primary filter cake to be 50% (based on the total mass of the high-salt ash), so as to obtain 5t of sewage (conveyed to a sewage storage tank) and the primary filter cake with 5t of water; conveying the first-stage filter cake into a second-stage washing device, washing with 10t of water (from a third-stage washing tank), performing second-stage filter pressing, and controlling the water content of the second-stage filter cake to be 50% (based on the total mass of the added high-salt ash), so as to obtain 10t of second-stage washed water (conveyed to the second-stage washing tank) and a second-stage filter cake with 5t of water residues; and (3) conveying the second-stage filter cake into a third-stage washing device, carrying out third-stage washing by adopting 6.5t of industrial water, then carrying out third-stage filter pressing, controlling the water content of the third-stage filter cake to be 15% (based on the total mass of the added high-salt ash), and obtaining 10t of third-stage washed water (conveyed to a third-stage washing tank) and the third-stage filter cake with 1.5t of water remained (transported to an outward transportation treatment).
The embodiment 10 of the utility model specifically is: see figure 5 of the specification. Conveying the high-salt ash into a primary washing device through a screw conveying device, performing primary washing by adopting 10t of water (8.5t of secondary washing tank water and 1.5t of tempering salt-containing water), performing primary filter pressing, and controlling the water content of a primary filter cake to be 50% (based on the total mass of the high-salt ash added), so as to obtain 5t of sewage (conveyed to a sewage storage tank) and the primary filter cake with 5t of water remained; conveying the first-stage filter cake into a second-stage washing device, washing with 8.5t of water (from a third-stage washing tank), performing second-stage filter pressing, and controlling the water content of the second-stage filter cake to be 50% (based on the total mass of the high-salt ash), so as to obtain 8.5t of second-stage washed water (conveyed to the second-stage washing tank) and a second-stage filter cake with 5t of water; and (3) conveying the second-stage filter cake into a third-stage washing device, carrying out third-stage washing by adopting 5t of industrial water, then carrying out third-stage filter pressing, controlling the water content of the third-stage filter cake to be 15% (based on the total mass of the added high-salt ash), and obtaining 8.5t of third-stage washed water (conveyed to a third-stage washing tank) and the third-stage filter cake with 1.5t of water remained (transported to an outward transportation treatment).
Through the process, the attached figure 3 in the specification shows that: the water amount of the wastewater generated by the traditional washing is 8.5m3H (sewage storage tank). As can be seen from the attached FIG. 4 of the specification: the water amount of the wastewater generated by the traditional cascade filter pressing process is 5m3H (sewage storage tank). As can be seen from the attached FIG. 5 of the specification: embodiment 10 of the utility model disclosesThe raw wastewater amount is 5m3Per h (waste storage tank), but 1.5m was consumed in the first-stage washing because of example 103Conditioning the salt-containing water in each hour, namely reducing the waste water of the whole plant by 1.5m3H, that is, the final wastewater volume produced by the embodiment 10 of the present invention is 3.5m3/h(5m3Per hour sewage storage tank-1.5 m3Quenched and tempered salt water of 3.5m3/h)。
Claims (19)
1. A contains salt buck and washes processing system which characterized in that: the system comprises: an ash bin (1), a multi-stage countercurrent water washing device (2) and a conditioning device (3); the ash bin (1) is connected with a multi-stage countercurrent water washing device (2) through a first pipeline (L1); the conditioning device (3) is connected with the multi-stage countercurrent water washing device (2) through a second pipeline (L2); and the tempering device (3) is also connected with a tempering agent conveying pipeline (301) and a salt-containing wastewater conveying pipeline (302).
2. The brine-containing grey water wash treatment system of claim 1, wherein: the hardening and tempering agent conveying pipeline (301) comprises a liquid caustic soda conveying pipeline and/or a PAC conveying pipeline; the salt-containing wastewater conveying pipeline (302) is a wet desulphurization salt-containing wastewater conveying pipeline and/or an activated carbon flue gas purification washing salt-containing wastewater conveying pipeline.
3. The brine-containing grey water wash treatment system of claim 1 or 2, wherein: the multistage countercurrent water washing device (2) comprises a first-stage water washing device (201), a second-stage water washing device (202) and a third-stage water washing device (203); the conditioning device (3) is connected to the primary water washing device (201) through a second pipeline (L2); the primary water washing device (201) is connected to the secondary water washing device (202) through a third pipeline (L3); the secondary water washing device (202) is connected to the tertiary water washing device (203) through a fourth pipeline (L4); the tertiary water washing device (203) is connected to the secondary water washing device (202) through a fifth pipeline (L5).
4. The brine-containing grey water wash treatment system of claim 3, wherein: the system also comprises a primary filter-pressing device (204), a secondary filter-pressing device (205) and a tertiary filter-pressing device (206); the primary filter pressing device (204) is arranged on a third pipeline (L3); the secondary filter-pressing device (205) is arranged on a fourth pipeline (L4); the three-stage filter pressing device (206) is arranged on a fifth pipeline (L5).
5. The brine-containing grey water wash treatment system of claim 4, wherein: the system also comprises a first-stage water washing tank (207), a second-stage water washing tank (208) and a third-stage water washing tank (209); a first bypass pipeline (P1) is led out from a third pipeline (L3) positioned at the downstream of the primary filter pressing device (204) and is connected to a primary water washing tank (207); a second bypass pipeline (P2) is led out from a fourth pipeline (L4) positioned at the downstream of the secondary filter pressing device (205) and is connected to a secondary water washing tank (208); the tertiary water washing tank (209) is arranged on a fifth pipeline (L5) positioned at the downstream of the tertiary filter pressing device (206).
6. The brine-containing grey water wash treatment system of any one of claims 1-2, 4, wherein: the system also comprises a spiral conveying device (4); the screw conveyor (4) is arranged on the first pipeline (L1).
7. The brine-containing grey water wash treatment system of claim 3, wherein: the system also comprises a spiral conveying device (4); the screw conveyor (4) is arranged on the first pipeline (L1).
8. The brine-containing grey water wash treatment system of claim 5, wherein: the system also comprises a spiral conveying device (4); the screw conveyor (4) is arranged on the first pipeline (L1).
9. The brine-containing grey water wash treatment system of claim 5 or 8, wherein: the system also includes a waste water storage tank (210); the primary water washing tank (207) is connected to the sewage storage tank (210) through a sixth pipe (L6).
10. The brine-containing grey water wash treatment system of claim 5 or 8, wherein: the secondary water washing tank (208) is also connected to the primary water washing device (201) through a seventh pipe (L7).
11. The brine-containing grey water wash treatment system of claim 9, wherein: the secondary water washing tank (208) is also connected to the primary water washing device (201) through a seventh pipe (L7).
12. The brine grey water wash treatment system of any one of claims 5, 8 and 11, wherein: the system also comprises a filter cake storage tank (211); the third stage filter pressing device (206) is connected to the filter cake storage tank (211) through an eighth pipeline (L8).
13. The brine-containing grey water wash treatment system of claim 9, wherein: the system also comprises a filter cake storage tank (211); the third stage filter pressing device (206) is connected to the filter cake storage tank (211) through an eighth pipeline (L8).
14. The brine-containing grey water wash treatment system of claim 10, wherein: the system also comprises a filter cake storage tank (211); the third stage filter pressing device (206) is connected to the filter cake storage tank (211) through an eighth pipeline (L8).
15. The brine-containing grey water wash treatment system of claim 12, wherein: the eighth conduit (L8) is a bypass conduit of the fifth conduit (L5).
16. The brine-containing grey water wash treatment system of claim 13 or 14, wherein: the eighth conduit (L8) is a bypass conduit of the fifth conduit (L5).
17. The brine grey water wash treatment system of any one of claims 5, 7-8, 11, 13-15, wherein: and the third-stage washing device (203) is also connected with an industrial water conveying pipeline (L9).
18. The brine-containing grey water wash treatment system of claim 9, wherein: and the third-stage washing device (203) is also connected with an industrial water conveying pipeline (L9).
19. The brine-containing grey water wash treatment system of claim 10, wherein: and the third-stage washing device (203) is also connected with an industrial water conveying pipeline (L9).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114028864A (en) * | 2021-11-17 | 2022-02-11 | 中冶长天国际工程有限责任公司 | High-salt solid waste integrated washing equipment and control method thereof |
| CN114107655A (en) * | 2021-11-10 | 2022-03-01 | 湖南博一环保科技有限公司 | Bidirectional countercurrent circulation washing process |
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| WO2023216471A1 (en) * | 2022-05-09 | 2023-11-16 | 中冶长天国际工程有限责任公司 | Process for collaborative treatment of multi-source wastewater in iron and steel plant for zero-discharge |
| CN117798179A (en) * | 2024-02-28 | 2024-04-02 | 中蓝长化工程科技有限公司 | Resource utilization method of household garbage incineration fly ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114107655A (en) * | 2021-11-10 | 2022-03-01 | 湖南博一环保科技有限公司 | Bidirectional countercurrent circulation washing process |
| CN114028864A (en) * | 2021-11-17 | 2022-02-11 | 中冶长天国际工程有限责任公司 | High-salt solid waste integrated washing equipment and control method thereof |
| CN114292969A (en) * | 2021-12-31 | 2022-04-08 | 湖南博一环保科技有限公司 | Method for co-processing waste incineration fly ash by blast furnace ironmaking |
| WO2023216471A1 (en) * | 2022-05-09 | 2023-11-16 | 中冶长天国际工程有限责任公司 | Process for collaborative treatment of multi-source wastewater in iron and steel plant for zero-discharge |
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