CN210728704U - Linkage distillation tower boiling tower system - Google Patents
Linkage distillation tower boiling tower system Download PDFInfo
- Publication number
- CN210728704U CN210728704U CN201920923398.4U CN201920923398U CN210728704U CN 210728704 U CN210728704 U CN 210728704U CN 201920923398 U CN201920923398 U CN 201920923398U CN 210728704 U CN210728704 U CN 210728704U
- Authority
- CN
- China
- Prior art keywords
- barrel
- distillation
- distillation tower
- ash
- tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a linkage distillation tower boiling tower system, which comprises a distillation tower, a pre-ash barrel, a mixing liquid connecting pipe, a recovery tank, a waste thin liquid storage barrel, a first mortar pump and a second mortar pump, wherein the distillation tower comprises a first distillation tower, a second distillation tower and the pre-ash barrel comprises a first pre-ash barrel and a second pre-ash barrel; the second distillation tower is communicated with the second pre-ash barrel, the mixing liquid connecting pipe is respectively connected with the first pre-ash barrel and the second pre-ash barrel, the recovery tank is communicated with the bottom ends of the first distillation tower, the second distillation tower, the first pre-ash barrel and the second pre-ash barrel, the recovery tank and the waste light liquid storage barrel are connected with the environment-friendly miscellaneous water pipe through pipelines, and the other end of the environment-friendly miscellaneous water pipe is respectively connected with the first pre-ash barrel and the second pre-ash barrel. The utility model discloses a waste liquid ammonia nitrogen value is up to standard and continuous steady operation when the system guarantees that the distillation column boils the tower, has realized the mediation liquid linkage and has carried the function, recycles the recovery of useless weak liquor heat energy, plays positive cost reduction synergism to the technology production.
Description
Technical Field
The utility model relates to a chemical industry technology technical field, concretely relates to linkage distillation column boiling tower system.
Background
In the production of soda ash by the ammonia soda process, NH3Is present as an intermediate medium and is circulated repeatedly and continuously during the production process, while NH3The recycling of (2) is effected by distillative filtration of the ammonia in the mother liquor. The ammonia-soda process ammonia distillation process is shown in figures 1-2, and mother liquor sent from a mother liquor barrel is sent to a distillation post through a pump, enters the bottom of a condenser and carries out reverse heat exchange with ammonia distillation gas coming out of a heater. The filtered mother liquor is heated in a condenser and part of free ammonia and CO is flashed at the top2A gas. The heated filtered mother liquor is separated by a separator and then flows into the top of a heater (namely a preheating section) to perform reverse heat exchange with gas rising from a vacuum distillation tower to evaporate most of CO2And free ammonia. And then, the preheated mother liquor overflows from the lower part of the preheating section to the upper part of a pre-ash barrel, is mixed with lime milk in the pre-ash barrel, reacts for about 30 minutes to ensure that ammonium chloride reacts with calcium hydroxide to generate ammonia hydroxide, calcium chloride and partial ammonia gas, the ammonia gas is mixed with the ammonia gas from a distillation section, the ammonia gas is introduced into the distillation section from the upper part of the pre-ash barrel, the mixed liquor in the barrel is self-pressed to the upper part of the distillation section from the lower part of the pre-ash barrel by the height of the liquid level, and meanwhile, partial mixed liquor in the mixed liquor pipe is conveyed back to the middle upper part of the pre-ash barrel through a. In the distillation section, liquid is in countercurrent contact with steam entering from the top to the bottom of the tower from top to bottom, ammonia in the liquid is evaporated, waste liquid enters a primary flash tank from the bottom of the tower, the flashed waste liquid enters a secondary flash tank, and finally the flashed waste liquid is pumped to a waste liquid barrel by a pump. The steam flashed by the first-stage flash device is led back to the distillation sectionAnd the steam flashed by the secondary flash evaporator is led back to the light liquid distillation tower.
In the ammonia-soda process, the lime sand and CaCO in the mixed solution3、CaSO4And the scaling of the distillation tower is inevitable, and substances are adhered to the tower wall, the tower plate and the bamboo hat after scaling, so that the efficiency of the tower plate is reduced, normal operation cannot be maintained, the operation cycle is stopped, and the tower scaling needs to be cleaned. The operation period of the distillation tower of the soda plant of the ammonia-soda process in China is generally (40-60) days, and the longest period is only half a year. Thus, the process also has an important operation-boiling and opening of the distillation tower.
As shown in fig. 3, the distillation column boiling step:
1) stopping feeding the mother liquor into the condenser, and stopping adding the lime milk into the pre-lime barrel;
2) opening a valve of a liquid mixing pipe entering a distillation section, and sending liquid stored in a pre-ash barrel into a distillation tower for distillation;
3) after the mixed liquid is emptied, adding straight-flow water into a pre-ash barrel, cleaning and sending the mixture to a distillation tower, and boiling the distillation tower for 2 hours;
4) stopping adding the clear water, stopping the mortar pump and stopping the stirrer after the liquid in the barrel is completely pulled; and (5) connecting electricians to cut off a stirring power supply and emptying accumulated liquid in the barrel.
A distillation tower opening step:
1) closing the manhole, and adding water to the liquid level of the pre-ash barrel 1/3;
2) and starting the stirring of the pre-ash barrel after the air tightness test is qualified. Slowly preheating all distillation equipment until the normal temperature is reached, and vacuumizing;
3) after lime milk is added, a mother liquor pump is started, mother liquor is added, and the lime milk and the mother liquor are controlled to enter the system in proportion;
4) analyzing the excessive ash components of the waste liquid and the blending liquid, and gradually reducing the excessive ash at the outlet of the distillation tower to control the excessive ash within a normal operation range;
5) and (5) checking that the process indexes such as equipment, instruments, electrical operation conditions, vacuum degree and the like are qualified, and switching to a positive operation range.
The prior art has the following defects:
the scar formation of the distillation tower is serious, and the ammonia nitrogen content of the waste liquid during the tower boiling is high.
CaSO in a blend4The concentration of which is unsaturated. However, as heat evaporates in the distillation column, CaSO4Is continuously increased, when entering the distillation section, CaSO4Is substantially saturated and begins to crystallize.
At the end of the distillation column, CaSO4Is prone to scab at the downcomer and gas phase channel. The steam circulation is not smooth, so the tower bottom is easy to be pressed. The mixed liquid overflows from the annular plate to the next tower ring gradually due to the blockage of the downcomer. The gas-liquid contact time is shortened, and the mass transfer efficiency is reduced. The distillation effect of the mixed liquid is poor, the ammonia nitrogen value of the waste liquid is high, and the environment-friendly discharge requirement of the waste liquid can be met only by additionally adding direct-flow water for dilution or separately storing and diluting.
And (II) during boiling, the temperature of the secondary flash waste liquid is low, the amount of flash steam is insufficient, and the weak liquor distillation tower needs to be supplemented with steam.
When the old process boiling tower is used, normal-temperature straight-flow water is added into a pre-ash barrel, the temperature of waste liquid of the boiling tower is low, the temperature of liquid storage of a secondary flash evaporator is reduced, the amount of steam flashed to a weak liquid tower is insufficient, the temperature of a weak liquid distillation tower is reduced, the content of ammonia nitrogen in waste weak liquid is easy to exceed the standard, additional steam is required to be added, and the steam consumption is increased.
And (III) increasing the heat load of the system during boiling and opening the tower, and influencing the absorption efficiency of refined brine and the quality of ammonia brine in the absorption process.
Both boiling and opening of the distillation tower need to add a certain amount of normal-temperature direct-flow water, and a large amount of steam needs to be introduced for heating. NH (NH)3The dissolution in water is an exothermic reaction, the gas outlet temperature of the absorption tower is too high, the soft water temperature of a vacuum system is increased along with the high gas outlet temperature, and the absorption efficiency of refined salt water is influenced. The ammonia content in the exhaust gas of the vacuum pump is increased and exceeds the ammonia nitrogen emission standard of the environmental-friendly waste gas, and the use amount of the refined salt water of the washing tower needs to be increased. The refined salt water has insufficient ammonia absorption, absorbs more water vapor in gas, partially reacts with the NaCl incompletely, has low conversion rate and greatly increases the consumption of the original salt. The evaporation and suction process adopts the water ring type vacuum pump to pump the system for vacuum, if high-temperature soft water is used for a long time, the system occupies the discharge capacity of the original vacuum pump, the air suction amount is reduced, and the pumping is carried outThe suction capacity decreases. Gradually influencing the absorption efficiency of the absorption tower and the ammonia distillation efficiency of the distillation tower.
(IV) generating a large amount of wastewater with high ammonia nitrogen content during the boiling tower
Because of the pipeline design problem, ash bucket and distillation column bottom hydrops can't pull away through the equipment pipeline in advance during boiling the tower, can only open the manhole and directly arrange outward, can cause a large amount of high-content ammonia nitrogen waste water to lose. The part of waste water is conveyed to a purification process through a ditch and an environmental protection machine pump, the ammonia nitrogen index of the waste liquid is influenced, and the cost for treating the ammonia nitrogen of the waste liquid is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the weak point that prior art exists and provide a linkage distillation column boiling tower system in soda production, this system guarantees that waste liquid ammonia nitrogen value is up to standard and continuous steady operation, plays positive cost reduction synergism to technology production.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a linkage distillation tower boiling tower system comprises a distillation tower, a pre-ash barrel, a mixing liquid connecting pipe, a recovery tank and a waste weak liquid storage barrel, wherein the distillation tower comprises a first distillation tower and a second distillation tower, and the pre-ash barrel comprises a first pre-ash barrel and a second pre-ash barrel; the second distillation tower is communicated with the second pre-ash barrel, two ends of the mixing liquid connecting pipe are respectively connected with the first pre-ash barrel and the second pre-ash barrel, a first mortar pump is arranged at the joint of the mixing liquid connecting pipe and the first pre-ash barrel, a second mortar pump is arranged at the joint of the mixing liquid connecting pipe and the second pre-ash barrel, a third valve is arranged at the joint of the mixing liquid connecting pipe, the recovery tank is communicated with the bottom ends of the first distillation tower, the second distillation tower, the first pre-ash barrel and the second pre-ash barrel, the recovery tank and the waste fresh liquid storage barrel are connected with the environment-friendly miscellaneous water pipe through pipelines, and the other end of the environment-friendly miscellaneous water pipe is respectively connected with the first pre-ash barrel and the second pre-ash barrel.
One or more mortar pumps are arranged in the existing distillation tower system, and the blending liquid can only circulate in the system and enters a distillation section or a pre-ash barrel. When boiling the tower, the ammonia nitrogen value of the waste liquid is high, and the index requirement can be met only by additionally adding industrial straight-flow water for dilution. Open the tower and boil the tower and need to add the straight-flow water, reduce the flash steam volume of distillation process, increase the heat load of absorption process, influence the product ammoniacal brine quality. The utility model discloses a through being equipped with the mediation liquid and connecting the pipe and lead to the transfer with the mediation liquid, can will wait to open the distillation column and directly change over to the stage of normal operating, adjust steam flow, heat mother's liquid flow and lime milk quantity according to conventional control strategy. Meanwhile, when the tower is boiled, the blending liquid of the first pre-ash barrel to be stopped is sent to the second pre-ash barrel to be started to serve as the starting mother liquid, the use of direct flow water is saved in the process, and compared with the old process, the generation of waste liquid can be greatly reduced. And meanwhile, the introduction of the waste weak liquor can also improve the temperature of the mixed liquor in the pre-ash barrel, reduce the steam consumption, be beneficial to reducing the resistance drop of a distillation system and improve the distillation efficiency. And the accumulated liquid at the bottom in the distillation tower is stored through a recovery tank, and the high-concentration ammonia nitrogen value wastewater is recycled by abnormally discharging in daily maintenance of the boiling tower and the working procedure, so that waste is changed into valuable.
Preferably, the first distillation tower comprises a preheating section A and a distillation section A, wherein the preheating section A is arranged at the upper end of the distillation section A, and the upper end of the distillation section A is communicated with the bottom end of the first pre-ash barrel.
Preferably, the mixing liquid connecting pipe connected with the first mortar pump is divided into three branches, one branch is communicated with the upper end of the distillation section A, one branch is communicated with the upper end of the first pre-ash barrel, the other branch is communicated with the mixing liquid connecting pipe, a first valve is arranged on the branch communicated with the distillation section A, a second valve is arranged on the branch communicated with the first pre-ash barrel, and the other end of the mixing liquid connecting pipe is connected with the second distillation tower and the pre-ash barrel.
Preferably, the second distillation tower comprises a preheating section B and a distillation section B, wherein the preheating section B is arranged at the upper end of the distillation section B, and the upper end of the distillation section B is communicated with the bottom end of the second pre-ash barrel.
Preferably, the mixing liquid connecting pipe connected from the second mortar pump is divided into three branches, one branch is communicated with the upper end of the distillation section B, one branch is communicated with the upper end of the second pre-ash barrel, the other branch is communicated with the other end of the mixing liquid connecting pipe, a fourth valve is arranged on the branch communicated with the distillation section B, and a fifth valve is arranged on the branch communicated with the second pre-ash barrel.
Preferably, the recovery tank is equipped with first centrifugal pump with the miscellaneous water piping junction of environmental protection, useless weak solution storage bucket is equipped with the second centrifugal pump with the miscellaneous water piping junction of environmental protection.
Preferably, the system further comprises a flash evaporator and a waste liquid barrel, wherein the waste liquid outlet of the first distillation tower and the waste liquid outlet of the second distillation tower are connected with the flash evaporator, and the flash evaporator is connected with the waste liquid barrel.
Preferably, a straight-through water flushing pipe is connected to each elbow of the mixing liquid connecting pipe. After the mixed liquid is linked each time, the related connecting pipes are flushed for 5 minutes by introducing direct current water, so that the long-term smoothness of the connecting pipes is ensured.
Preferably, the third valve is a double gate valve. The third valve is set to be at least two. And a third valve is arranged at the position where each mortar pump is connected with the mixing liquid connecting pipe. Because the pressure of the direct flow water is limited, a valve is added in the middle of the connecting pipe of the mixing liquid only for facilitating the sectional flushing of the pipeline, especially under the linkage condition of multiple sets of systems. The third valve adopts a double-gate structure, and is completely sealed in any direction after being closed, so that the flow of the mixed liquid in parallel connection with each distillation tower can be realized. When one or two sets of distillation towers or pre-ash barrels need to be maintained, and when the two sets of distillation towers or the two sets of pre-ash barrels are used for conveying the mixed liquid, the double-gate valve of the third valve can prevent the mixed liquid from permeating into other distillation towers in maintenance.
Preferably, the distillation tower comprises at least two sets of distillation towers, the pre-ash barrels comprise at least two sets of pre-ash barrels, and the mixing liquid connecting pipe comprises at least one mixing liquid connecting pipe. The utility model discloses a linkage distillation column boiling tower system's distillation column, the quantity of ash bucket in advance are not restricted to two sets, can set up many sets of distillation columns according to the actual demand, ash bucket in advance, realize parallelly connected mixing liquid through a plurality of mixing liquid liaison pipes and carry.
The utility model has the advantages that:
1. the proportion of hot mother liquor and lime milk in ammonia-soda distillation process is controlled by empirical formula, namely lm3The hot mother liquor of (3) to (4) m3The pH value is further maintained in a stable range. The reaction residence time in the preliming barrel is about 30 minutes, so the pH value is controlledThere is a large hysteresis characteristic. When the concentration of lime milk or the flow of hot mother liquor fluctuates, the operation hysteresis not only causes the pH value control system to adjust for too long time, but also causes great overshoot. The distillation tower can be directly switched to a normal operation stage by communicating and conveying the mixed liquid, and the steam flow, the heat mother liquid flow and the lime milk consumption are regulated according to a conventional control strategy.
2. The utility model discloses the valve of UNICOM's pipeline chooses for use wear-resisting double gate valve. The valve flashboard, the valve seat, the channel and the like are made of wear-resistant ceramics or hard wear-resistant alloy. The valve adopts a double-gate structure, and is completely sealed in any direction after being closed, so that the flow of the mixed liquid in parallel connection with each distillation tower can be realized.
3. When the tower is boiled, the blending liquid of the pre-ash bucket to be stopped is sent to the pre-ash bucket to be started to serve as the starting mother liquid, the use of direct flow water is saved in the process, and compared with the old process, the generation of waste liquid can be greatly reduced. The introduction of the waste weak liquor can also improve the temperature of the mixed liquor in the pre-ash barrel, reduce the steam consumption, be favorable for reducing the resistance drop of a distillation system and improve the distillation efficiency.
4. Waste weak liquor is added into a second pre-ash barrel to be opened, so that the water content in the mother liquor of the tower opening can be increased, and the mother liquor can not reach the saturated solubility of salts all the time. The waste thin liquid contains a small amount of CO3 2-(about 2 to 3g/l) promoting CaCO3And CaSO4The crystallization reaction in the pre-ash bucket fully reacts, and the supersaturation degree is eliminated in time under the state of strong stirring, so that the crystals are fully separated out in the pre-ash bucket, and the hidden trouble that a large amount of scars are formed at the initial operation stage of the distillation tower is solved.
5. The high-concentration ammonia nitrogen value wastewater abnormally discharged during the daily maintenance of the boiling tower and the working procedure is recycled, so that the waste is changed into valuable. Ensuring the environmental protection index of the subsequent discharge of clear waste liquid to reach the standard.
Drawings
FIG. 1 is a block diagram of a prior art process flow;
FIG. 2 is a schematic diagram of a prior art structure;
FIG. 3 is a flow diagram of a prior art digester;
FIG. 4 is a schematic structural view of the present invention;
FIG. 5 is the overall process flow diagram of the present invention;
fig. 6 is a schematic view of a pipeline structure according to embodiment 2 of the present invention.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings and only schematically illustrate the basic structure of the invention, and the direction of the present embodiment is based on the direction of fig. 4.
Example 1
As shown in figures 4-5, the utility model discloses a linkage distillation column boiling tower system, including first distillation column 1, first grey bucket 2, mixing liquid connecting pipe 3, second grey bucket 4, second distillation column 5, accumulator 6, useless weak solution storage bucket 7, flash tank 8, waste liquid bucket 9 in advance.
Wherein, first distillation column 1 includes preheating section A, distillation section A, and preheating section A sets up in distillation section A upper end, and the mother liquor stops advancing through the upper end of first pipeline 21 intercommunication distillation section A in the bottom of first pre-ash bucket 2, and during the lime cream, distillation section A and first pre-ash bucket reach the liquid level balance through first pipeline 21. The first pipeline 21 is connected with the first mixed liquid connecting pipe 3, a first mortar pump 22 is arranged between the first pipeline 21 and the mixed liquid connecting pipe 3, the mixed liquid connecting pipe 3 which is connected from the first mortar pump 22 is divided into three branches, one branch is communicated with the upper end of the distillation section A, a first valve 31 is arranged on a branch communicated with the distillation section A, one branch is communicated with the upper end of the first pre-ash barrel 2, a second valve 32 is arranged on a branch communicated with the first pre-ash barrel 2, the other branch is communicated with the mixed liquid connecting pipe 3, a third valve 33 is arranged on the mixed liquid connecting pipe 3, the third valve 33 is arranged at the middle position where the first mortar pump and the second mortar pump are connected at the mixing liquid connecting pipe 3, the pipeline can be conveniently flushed in a segmented mode by additionally arranging the valve in the middle of the mixing liquid connecting pipe due to limited direct-current water pressure, and the other end of the mixing liquid connecting pipe 3 is connected with the second pre-ash barrel 4 and the second distillation tower 5.
The second distillation tower 5 comprises a preheating section B and a distillation section B, the preheating section B is arranged at the upper end of the distillation section B, the bottom end of a second pre-ashing barrel 4 is communicated with the upper end of the distillation section B through a second pipeline 51, the second pipeline 51 is connected with a blending liquid connecting pipe 3, a second mortar pump 52 is arranged between the second pipeline and the blending liquid connecting pipe 3, the blending liquid connecting pipe 3 connected from the second mortar pump 52 is divided into three branches, one branch is communicated with the upper end of the distillation section B, a fourth valve 34 is arranged on the branch communicated with the distillation section B, one branch is communicated with the upper end of the second pre-ashing barrel 4, a fifth valve 35 is arranged on the branch communicated with the second pre-ashing barrel 4, the other branch is communicated with the blending liquid connecting pipe 3, and a third valve 33 is arranged on the blending liquid connecting pipe 3.
The utility model discloses a double gate valve is chooseed for use to third valve, can let transmission medium ability bidirectional flow. The valve gate, the valve seat, the channel and the like are all made of wear-resistant ceramics or hard wear-resistant alloy, the valve is of a double-gate structure, and the valve is completely sealed in any direction after being closed, so that the mixing liquid flows in parallel in each distillation tower. Each elbow of the mixed liquid connecting pipe 3 is connected with a straight-flow water flushing pipe 36, and after the mixed liquid is linked each time, the related mixed liquid connecting pipe is flushed by the straight-flow water for 5 minutes, so that the connecting pipe is ensured to be smooth for a long time;
the recycling tank 6 is communicated with the bottom ends of the first distillation tower, the second distillation tower, the first pre-ash barrel and the second pre-ash barrel through pipelines, the pipelines of the first distillation tower, the second distillation tower, the first pre-ash barrel, the second pre-ash barrel and the recycling tank 6 are respectively provided with a blow-down valve 60, the recycling tank 6 can collect residual liquid discharged by the blow-down valves of the first distillation tower, the second distillation tower, the first pre-ash barrel and the second pre-ash barrel, the other end of the recycling tank 6 is communicated with the environmental-friendly miscellaneous water pipe 61 through a pipeline, a first centrifugal pump 62 is arranged between the environmental-friendly miscellaneous water pipe 61 and the recycling tank 6 and is provided with a recycling valve 63, the waste light liquid storage tank 7 is connected with the environmental-friendly miscellaneous water pipe 61 through a pipeline, a second centrifugal pump 71 is arranged between the waste light liquid storage tank 7 and the environmental-friendly miscellaneous water pipe 71, a waste light liquid valve 72 is arranged on a pipeline between the second centrifugal pump 71 and the waste light liquid storage tank 7, and the other end, one branch is communicated with the top end of the first pre-ash barrel 2, the other branch is communicated with the top end of the second pre-ash barrel 4, and valves 64 are respectively arranged on the two branches. The environmental protection miscellaneous water pipe 61 of the utility model is a drainage pipeline used for conveying environmental protection ground of other posts.
The waste liquid outlet of the first distillation tower and the waste liquid outlet of the second distillation tower are communicated with the flash tank 8, the flash tank is communicated with the waste liquid barrel 9, the waste liquid enters the flash tank from the bottom ring of the tower, and the waste liquid is finally pumped to the waste liquid barrel by the machine and purified.
The utility model discloses a method for using linkage distillation column boiling tower system, including following step:
1) stopping feeding the mother liquid into the condenser, stopping adding the lime milk into the first pre-lime barrel 2;
2) closing a first valve 31 of the first mortar pump 22 which is fed into the first distillation section A and a second valve 32 of the first pre-ash barrel 2, opening 3 third double-gate valves 33 of the mixing fluid connecting pipe 3 which are communicated with the first mortar pump and the second mortar pump, opening a waste thin liquid valve 72 of a waste thin liquid pipeline, opening a fifth valve 35 which enters the second pre-ash barrel 4, and opening a valve 64 of the environment-friendly miscellaneous water pipe 61 which is communicated with the second pre-ash barrel 4. The mixed liquid of the first pre-ash barrel 2 and the waste thin liquid of the waste thin liquid storage barrel 7 are sent into a second pre-ash barrel 4 to be opened;
3) after the mixed liquid in the second pre-ash barrel 4 rises to 1/3 liquid level, the second pre-ash barrel is started to stir after the airtight test is qualified, then the second distillation tower 5 is slowly heated until the normal temperature is reached, and the second distillation tower is vacuumized.
4) After lime milk is added into the second pre-lime barrel 4, starting a mother liquor pump and feeding mother liquor;
5) and after the blending liquid in the first pre-ash barrel 2 is completely sent into the second pre-ash barrel 4, stopping the first mortar pump 22. Stopping the waste thin liquid in the second pre-ashing barrel 4, opening a valve 64 of the waste thin liquid leading to the first pre-ashing barrel 2, closing 3 third valves 33 of the mixed liquid connecting pipe 3, and transferring the waste thin liquid into the first pre-ashing barrel 2 for replacement and cleaning; and the waste thin liquid of the first pre-ash barrel 2 is transferred to the first distillation tower 1.
6) And starting a second mortar pump 52, and gradually balancing the materials of the second distillation tower 5 and the second pre-ash barrel 4 to shift to a positive operation range.
7) The first pre-ash barrel 2 stops adding the waste fresh liquid water, and after the liquid in the first pre-ash barrel 2 (as in step 5) is transferred to the first distillation tower 1 through the liquid level difference to reach the equilibrium. And opening a first mortar pump 22 and a first valve 31 of the first distillation tower 1, and sending the liquid stored in the first pre-ash barrel 2 to the first distillation tower 1 for replacement. Opening a blow-down valve at the bottom of the barrel by the residual liquid which cannot be conveyed by the pump, flowing into the recovery tank through the trench, stopping the first mortar pump 22, and stopping the stirrer; cutting off a stirring power supply by an electrician, opening a manhole, and emptying accumulated liquid in the first distillation tower 1 until a recovery tank collects the accumulated liquid;
8) and starting the first centrifugal pump 62, and delivering the accumulated liquid in the recovery tank to the second pre-ash barrel.
9) And analyzing the excessive ash of the waste liquid and the mixed liquid, and gradually reducing the excessive ash at the outlet of the second distillation tower 5 to control the excessive ash in a normal operation range.
10) And (5) checking that the process indexes such as equipment, instruments, electrical operation conditions, vacuum degree and the like are qualified, and switching to normal operation.
Example 2
The utility model discloses a linkage distillation column boiling tower system's distillation column, the quantity of ash bucket in advance are not restricted to two sets, can set up many sets of distillation columns according to the actual demand, ash bucket in advance, realize parallelly connected mixing liquid through a plurality of mixing liquid liaison pipes and carry.
In this embodiment, four distillation towers, four pre-ash barrels and two mixing liquid connecting pipes are taken as examples, the connection modes of other devices such as a recovery tank 6, a waste thin liquid storage barrel 7, a flash generator 8, a waste liquid barrel 9, an environment-friendly miscellaneous water pipe 61, the pre-ash barrels and the distillation towers are the same as those of embodiment 1, and detailed description is not given here, as shown in fig. 6, fig. 6 is a schematic diagram of the connection pipelines of a plurality of distillation towers, pre-ash barrels, mixing liquid connecting pipes and mortar pumps, the distillation tower of this embodiment comprises a first distillation tower 1, a second distillation tower 5, a third distillation tower 10, a fourth distillation tower 20, the pre-ash barrels comprise a first pre-ash barrel 2, a second pre-ash barrel 4, a third pre-ash barrel 40 and a fourth pre-ash barrel 50, the mixing liquid connecting pipes 3 are arranged in two, the two mixing liquid connecting pipes 3 are connected through a four-way pipe, and the mortar pump comprises a first mortar pump 22, a second mortar pump 52, a third mortar pump 23, A fourth mortar pump 53, wherein the third valve 33 of the present embodiment is a double-gate valve, as described in embodiment 1, one of the mixing fluid connecting pipes 3 connects the first distillation tower, the second distillation tower, the first pre-ashing barrel, the second pre-ashing barrel, the first mortar pump, the second mortar pump, the other mixing fluid connecting pipe 3 connects the third distillation tower, the fourth distillation tower, the third pre-ashing barrel, the fourth pre-ashing barrel, the third mortar pump, the fourth mortar pump, and the connection manner of the components is the same as that of embodiment 1.
The third valve of this embodiment adopts the double-gate structure, and any direction is totally sealed after closing, and it can realize to make the harmonic liquid flow in parallel each distillation column.
The embodiment is provided with four sets of distillation towers, four sets of pre-ash buckets and other equipment, can realize the mutual conveying of the blending liquid between the multiple sets of distillation towers and the pre-ash buckets, and can be randomly matched and transferred to operate according to the requirement. For example, the following transport modes are possible: conveying the blending liquid of the first pre-ash barrel to a second pre-ash barrel, conveying the blending liquid of the first pre-ash barrel to a third pre-ash barrel, and conveying the blending liquid of the first pre-ash barrel to a fourth pre-ash barrel; conveying the blending liquid of the second pre-ash barrel to a third pre-ash barrel, and conveying the blending liquid of the second pre-ash barrel to a fourth pre-ash barrel; the blending liquid in the third pre-ash barrel is conveyed to the fourth pre-ash barrel, and the conveying mode can be reversed. When one or two sets of distillation towers or pre-ash barrels need to be maintained, the double-gate valve of the third valve can prevent the blending liquid from permeating into other distillation towers in maintenance when the two sets of distillation towers and the two sets of pre-ash barrels are used for conveying the blending liquid.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The linkage distillation tower boiling tower system is characterized by comprising a distillation tower, a pre-ashing barrel, a mixing liquid connecting pipe, a recovery tank and a waste weak liquid storage barrel, wherein the distillation tower comprises a first distillation tower and a second distillation tower, and the pre-ashing barrel comprises a first pre-ashing barrel and a second pre-ashing barrel; the second distillation tower is communicated with the second pre-ash barrel, two ends of the mixing liquid connecting pipe are respectively connected with the first pre-ash barrel and the second pre-ash barrel, a first mortar pump is arranged at the joint of the mixing liquid connecting pipe and the first pre-ash barrel, a second mortar pump is arranged at the joint of the mixing liquid connecting pipe and the second pre-ash barrel, a third valve is arranged at the joint of the mixing liquid connecting pipe, the recovery tank is communicated with the bottom ends of the first distillation tower, the second distillation tower, the first pre-ash barrel and the second pre-ash barrel, the recovery tank and the waste fresh liquid storage barrel are connected with the environment-friendly miscellaneous water pipe through pipelines, and the other end of the environment-friendly miscellaneous water pipe is respectively connected with the first pre-ash barrel and the second pre-ash barrel.
2. The linked distillation tower boiling system of claim 1 wherein the first distillation tower comprises a preheating section a and a distillation section a, the preheating section a being disposed at an upper end of the distillation section a, the upper end of the distillation section a being in communication with a bottom end of the first pre-ash drum.
3. The linked distillation tower boiling tower system as claimed in claim 2, wherein the mixing liquid connecting pipe connected from the first mortar pump is divided into three branches, one branch is communicated with the upper end of the distillation section a, one branch is communicated with the upper end of the first pre-ashing barrel, the other branch is communicated with the mixing liquid connecting pipe, a first valve is arranged on the branch communicated with the distillation section a, a second valve is arranged on the branch communicated with the first pre-ashing barrel, and the other end of the mixing liquid connecting pipe is connected with the second distillation tower and the pre-ashing barrel.
4. The linked distillation tower boiling tower system of claim 1 wherein the second distillation tower comprises a preheating section B and a distillation section B, the preheating section B is disposed at an upper end of the distillation section B, and an upper end of the distillation section B is in communication with a bottom end of the second pre-ash bucket.
5. The linked distillation tower boiling tower system as claimed in claim 4, wherein the mixing liquid connecting pipe connected from the second mortar pump is divided into three branches, one branch is communicated with the upper end of the distillation section B, one branch is communicated with the upper end of the second pre-ashing barrel, the other branch is communicated with the other end of the mixing liquid connecting pipe, a fourth valve is arranged on the branch communicated with the distillation section B, and a fifth valve is arranged on the branch communicated with the second pre-ashing barrel.
6. The linked distillation tower boiling tower system as claimed in claim 1, wherein a first centrifugal pump is arranged at the connection of the recovery tank and the environmental-friendly miscellaneous water pipe, and a second centrifugal pump is arranged at the connection of the waste thin liquid storage barrel and the environmental-friendly miscellaneous water pipe.
7. The linked distillation tower boiling system as claimed in claim 1, further comprising a flash tank, a waste liquid tank, wherein the waste liquid outlet of the first distillation tower and the waste liquid outlet of the second distillation tower are connected to the flash tank, and the flash tank is connected to the waste liquid tank.
8. The linked distillation tower boiling system as recited in claim 1 wherein a straight water flushing pipe is connected to each elbow of said blend liquid connecting pipe.
9. The linked distillation column boiling tower system of claim 1, wherein the third valve is a dual gate valve, and the third valve is provided in at least two.
10. The linked distillation tower boiling tower system of claim 1 wherein the distillation tower comprises at least two sets of distillation towers, the pre-ash barrels comprise at least two sets of pre-ash barrels, and the blend liquid communication pipe comprises at least one blend liquid communication pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920923398.4U CN210728704U (en) | 2019-06-18 | 2019-06-18 | Linkage distillation tower boiling tower system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920923398.4U CN210728704U (en) | 2019-06-18 | 2019-06-18 | Linkage distillation tower boiling tower system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210728704U true CN210728704U (en) | 2020-06-12 |
Family
ID=70980016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920923398.4U Active CN210728704U (en) | 2019-06-18 | 2019-06-18 | Linkage distillation tower boiling tower system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210728704U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147016A (en) * | 2021-12-09 | 2022-03-08 | 广东南方碱业股份有限公司 | Cleaning system for carbonization tower |
-
2019
- 2019-06-18 CN CN201920923398.4U patent/CN210728704U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114147016A (en) * | 2021-12-09 | 2022-03-08 | 广东南方碱业股份有限公司 | Cleaning system for carbonization tower |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210728704U (en) | Linkage distillation tower boiling tower system | |
| CN201834781U (en) | Single-stage vacuum distillation seawater desalination device | |
| CN209618920U (en) | A kind of processing unit for landfill leachate | |
| CN208362091U (en) | A kind for the treatment of high-concentration saline organic wastewater processing system | |
| CN101759272B (en) | Supercritical water oxidized organic wastewater treating system | |
| CN211971803U (en) | Novel materialized wastewater triple-effect evaporation system | |
| CN111375221A (en) | Multistage cooling circulation freezing crystallization system and crystallization process thereof | |
| CN102032835A (en) | Surface anti-scaling method for evaporator for brine | |
| CN213253114U (en) | 2, 3-dichloropyridine and intermediate continuous extraction industrialization device | |
| CN212039090U (en) | Switchable two-effect evaporation concentration crystallizer | |
| CN211198664U (en) | Skid-mounted solar seawater desalination device | |
| CN212491600U (en) | Novel stirring dewatering device of proline automatic control temperature | |
| CN210367047U (en) | Multistage flash distillation desulfurization effluent treatment plant | |
| CN102728082B (en) | Steam evaporating, concentrating and crystallizing system without live steam | |
| CN209307138U (en) | A kind of Desulphurization for Coal-fired Power Plant Waste water concentrating sofening treatment device | |
| CN209906377U (en) | High-salinity wastewater desalination treatment device | |
| CN113577816A (en) | Steam condensate recycling equipment | |
| CN111056580A (en) | Vinyl sulfate waste water treatment and recovery system | |
| CN111777117A (en) | Anti-scaling triple-effect evaporation system for zero discharge of desulfurization wastewater of coal-fired power plant | |
| CN110697815B (en) | Double-effect evaporator system | |
| CN115006857B (en) | Intermittent evaporation crystallization device and process adopting two-effect parallel evaporation | |
| CN216081012U (en) | Blast furnace slag flushing water waste heat recovery system based on vacuum phase change | |
| CN211486578U (en) | Jet compressor heat supply system for evaporation tower kettle or tower kettle reboiler | |
| CN202576024U (en) | Power plant circulating discharged sewage freeze desalination system | |
| CN212482227U (en) | Heat exchange device for desulfurization wastewater and flue gas waste heat |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |