CN117427351A - Intelligent acid regeneration system capable of preventing crystallization blockage and operation method - Google Patents
Intelligent acid regeneration system capable of preventing crystallization blockage and operation method Download PDFInfo
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- CN117427351A CN117427351A CN202311621140.6A CN202311621140A CN117427351A CN 117427351 A CN117427351 A CN 117427351A CN 202311621140 A CN202311621140 A CN 202311621140A CN 117427351 A CN117427351 A CN 117427351A
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- 239000002253 acid Substances 0.000 title claims abstract description 81
- 230000008929 regeneration Effects 0.000 title claims abstract description 39
- 238000011069 regeneration method Methods 0.000 title claims abstract description 39
- 238000002425 crystallisation Methods 0.000 title claims abstract description 26
- 230000008025 crystallization Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims abstract description 105
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 238000004094 preconcentration Methods 0.000 claims abstract description 38
- 239000007921 spray Substances 0.000 claims abstract description 28
- 238000010992 reflux Methods 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 238000004140 cleaning Methods 0.000 claims abstract description 22
- 239000002699 waste material Substances 0.000 claims abstract description 16
- 230000000903 blocking effect Effects 0.000 claims abstract description 13
- 239000010865 sewage Substances 0.000 claims abstract description 7
- 238000011010 flushing procedure Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 5
- 238000010612 desalination reaction Methods 0.000 claims 2
- 239000007789 gas Substances 0.000 claims 1
- 238000003860 storage Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 238000010306 acid treatment Methods 0.000 description 5
- 238000011033 desalting Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 238000005554 pickling Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- VRHBRFRAURNWBL-UHFFFAOYSA-N [Ti].[Mo].[Ni].[Co] Chemical compound [Ti].[Mo].[Ni].[Co] VRHBRFRAURNWBL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0058—Use of waste energy from other processes or sources, e.g. combustion gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0325—Control mechanisms therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B19/00—Combinations of furnaces of kinds not covered by a single preceding main group
- F27B19/04—Combinations of furnaces of kinds not covered by a single preceding main group arranged for associated working
Abstract
The invention provides an anti-crystallization blocking intelligent acid regeneration system which comprises a preconcentrator and a roasting furnace, wherein a stacking valve is further arranged on a roasting feed pipeline, a sewage pipeline with a sewage valve is connected to the lowest end of the roasting feed pipeline, a liquid inlet module is arranged between the roasting feed pipeline and a top spray gun of the roasting furnace, a desalted water inlet pipeline is connected to the liquid inlet module, and a return pipeline is arranged on a connecting pipeline between a feeding pump of the roasting furnace and the liquid inlet module. According to the invention, by arranging the roasting feeding pipeline, the pre-concentration circulating pipeline, the reflux pipeline, the desalted water inlet pipeline and the water inlet module, an operator can utilize the same set of acid regeneration production system to carry out forward acid waste liquid regeneration and reverse desalted water cleaning, so that the acid regeneration function and the pipeline cleaning function are realized, the crystallization blockage in the feeding pipeline of the roasting furnace is effectively prevented, the pipeline structure of the system is simplified, and the intelligent automatic control of the system is facilitated.
Description
Technical Field
The invention belongs to the technical field of acid regeneration, and particularly relates to an anti-crystallization blocking intelligent acid regeneration system and an operation method.
Background
The metallurgical industry, chlor-alkali industry, cobalt nickel titanium molybdenum and other colored industries generally adopt mixed liquor of hydrochloric acid, nitric acid and hydrofluoric acid and the like to acid-wash steel, so that a large amount of acid-wash waste liquid is generated. In order to reduce the production cost of enterprises and reduce the harm of acid washing waste liquid to the environment, the industries generally adopt an acid treatment technology to regenerate and recycle the acid washing waste liquid so as to realize the recycling of acid liquid. The acid treatment system is generally configured for acid washing waste liquid regeneration, the core part of the acid treatment system comprises a chemical heat treatment unit taking a roasting furnace as a core and a flue gas cooling and concentrating unit taking a pre-concentrator as a core, and the acid washing waste liquid is efficiently concentrated by utilizing the waste heat of high-temperature flue gas, so that the fuel gas consumption in the roasting furnace and the running cost of the system are reduced.
In the existing acid treatment system, in order to keep stable operation of concentrated acid liquid in a pre-concentrator and a roasting furnace, a great amount of manpower is often required to be increased to control a circulating pipeline of the pre-concentrator and a feeding pipeline of the roasting furnace, so that the concentrated acid pipeline is smooth and not blocked when the pre-concentrator and the roasting furnace normally operate, and when emergency shutdown occurs, an emptying manual valve is manually opened, so that the concentrated acid liquid is reduced to be statically deposited and cooled in equipment and the pipeline for crystallization, and the equipment and the pipeline for operating the concentrated acid are prevented from being blocked, and the equipment and the pipeline are prevented from being damaged. The operation and control means are troublesome to operate in actual production, particularly when the temperature is low in winter, the safety risk is high, once the equipment and the pipelines are improperly treated, the crystallization blockage of the equipment and the pipelines is easily caused, the safe use of the equipment and the pipelines is affected, the equipment and the pipelines are burst or damaged, and the acid liquor is splashed, so that the personnel safety of operators is adversely affected.
Therefore, there is a need for an intelligent acid regeneration system and method of operation that is simple to operate, and that is simple in system and prevents crystallization blockage.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an intelligent acid regeneration system for preventing crystallization blockage and an operation method thereof, and aims to solve the problems that a large amount of manpower is required to be added to control a circulating pipeline of a pre-concentrator and a feeding pipeline of a roasting furnace in the prior acid regeneration system and method, the operation is troublesome, and the safety risk is high.
In order to solve the technical problems, the invention provides an anti-crystallization blocking intelligent acid regeneration system, which comprises a pre-concentrator and a roasting furnace, wherein an air outlet of the roasting furnace is connected with the top of the pre-concentrator through a flue gas pipeline, a liquid outlet end of the pre-concentrator is connected with the top of the pre-concentrator through a pre-concentration circulating pipeline, a liquid outlet end of the pre-concentrator is connected with a top spray gun of the roasting furnace through a roasting feeding pipeline, a pre-concentration circulating pump is arranged on the pre-concentration circulating pipeline, a roasting furnace feeding pump is arranged on the roasting feeding pipeline, the pre-concentration circulating pipeline and the roasting feeding pipeline share a pipeline connected with the liquid outlet end of the pre-concentrator, a pressure-superposed valve is further arranged on the roasting feeding pipeline, a drain pipeline with a drain valve is connected at the lowest end of the roasting feeding pipeline, a liquid inlet module is arranged between the roasting feeding pipeline and the top spray gun of the roasting furnace, a desalted water inlet pipeline is connected with the liquid inlet module, a return pipeline is connected with the outlet of the roasting feeding pipeline between the roasting furnace feeding pump and the liquid inlet module, and the return pipeline is connected with the return pipeline.
Optionally, the feed liquor module includes feed header pipe, feed branch pipe and water inlet branch pipe, the feed header pipe with connect in parallel the back with the same end of feed branch pipe, the other end of feed branch pipe is connected the calcination feed pipeline, the feed header pipe is connected the top spray gun of calcination stove, water inlet branch pipe is connected the desalted water inlet pipeline.
Optionally, a main pipe liquid inlet valve is arranged on the feeding main pipe, a branch pipe liquid inlet valve is arranged on the feeding branch pipe, and water inlet valves are arranged on the water inlet branch pipes.
Optionally, the pressure-superposed valve, the reflux valve, the blow-down valve, the main pipe liquid inlet valve, the branch pipe liquid inlet valve and the water inlet valve are all self-control valves.
Optionally, detectors for detecting pressure or flow in the pipe are arranged on the pre-concentration circulating pipeline, the connecting pipeline of the pressure-superposed valve, the connecting pipeline of the reflux valve, the feeding main pipe and the feeding branch pipe.
The invention also provides an operation method of the crystallization blocking prevention intelligent acid regeneration system, which comprises automatic start operation and emergency shutdown cleaning;
the automatic starting operation specifically comprises the following steps: after the waste liquid in the pre-concentrator reaches the liquid level of the starting pump, the pre-concentration circulating pump is automatically started, and the pre-concentration circulation is started;
after the running pressure or flow of the pretreatment circulating pipeline is stable, automatically opening the pressure-superposed valve to start liquid supply to the feeding pump of the roasting furnace, and automatically starting the feeding pump of the roasting furnace;
after the running pressure of the feeding pump of the roasting furnace is stable, automatically opening a return pipeline to keep the stable running pressure and flow of the feeding pump of the roasting furnace;
when the system is switched into a production mode, an acid inlet end and an acid outlet end of the liquid inlet module are automatically opened, liquid is fed into a spray gun at the top of the roasting furnace, and when the liquid inlet flow or pressure of the spray gun is stable, the reflux valve is automatically closed;
the emergency shutdown cleaning specifically comprises the following steps:
when the roasting furnace is stopped or in emergency stop, the feeding pump of the roasting furnace is stopped, the pressure-superposed valve is automatically closed, the spray gun is automatically stopped to spray, the sewage discharge pipeline and/or the return pipeline are automatically opened, and the residual liquid in the pipeline is emptied;
the system enters an automatic cleaning state, automatically closes the acid outlet end of the liquid inlet module, opens the water inlet end of the liquid inlet module, and washes the roasting feeding pipeline by water entering from the water inlet end to the acid inlet end;
when the flushing effluent becomes clear, the reflux valve, the blow-down valve and the desalted water inlet pipeline are automatically closed until the next period of production is started.
Optionally, when the operation is started automatically, the branch pipe liquid inlet valve and the main pipe liquid inlet valve in the liquid inlet module are opened automatically;
when the emergency shutdown is carried out, a main pipe liquid inlet valve in the liquid inlet module is automatically closed, and a water inlet valve is automatically opened.
Alternatively, in the automatic start-up operation, the calciner feed pump can only be started when the pre-concentration circulation pump is running steadily.
Optionally, after the flushing effluent becomes clear, the reflux valve and the blow-off valve are closed first, and then the desalted water inlet pipeline is closed; before the next period of production, the blow-down valve is opened to discharge the stored water in the equipment and the pipeline.
Optionally, when the flushing effluent is clear, after the reflux valve and the blow-off valve are automatically closed, the desalting water valve is closed after the pressure reaches 0.25-0.3 Mpa.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the intelligent acid regeneration system and the operation method for preventing crystallization blockage, provided by the invention, the roasting feeding pipeline, the pre-concentration circulating pipeline, the return pipeline, the desalted water inlet pipeline and the water inlet module are arranged, the return pipeline and the pre-concentration circulating pipeline are connected in parallel, the roasting feeding pipeline and the roasting feeding pipeline share one section of pipeline with a roasting furnace feeding pump and a stacking valve, and the water inlet module is connected with the roasting feeding pipeline and a roasting furnace top spray gun and the desalted water inlet pipeline and the roasting feeding pipeline, so that an operator can utilize the same acid regeneration production system to carry out forward acid waste liquid regeneration and reverse desalted water cleaning, the acid regeneration function and the pipeline cleaning function are realized, the crystallization blockage in the roasting furnace feeding pipeline is effectively prevented, the system pipeline structure is simplified, the operation control difficulty is reduced, and the intelligent automatic control of the system is facilitated.
2. According to the crystallization blocking prevention intelligent acid regeneration system and the operation method, two operation modes of automatic starting operation and emergency shutdown cleaning are set, the pre-concentration circulation pipeline, the reflux pipeline and the roasting supply pipeline are gradually opened in the automatic starting operation mode, the pipeline pressure in the starting production process is stabilized, the original roasting supply pipeline is reversely fed for cleaning in the emergency shutdown cleaning mode, intelligent operation control of production and cleaning of the acid regeneration system is realized, labor is saved, and the safety of system operation is guaranteed.
Drawings
FIG. 1 is a schematic diagram of an intelligent acid regeneration system for preventing crystallization blockage according to an embodiment of the invention;
wherein, 1, a preconcentrator; 2. a pre-concentration circulation pump; 3. a roasting furnace feed pump; 4. a spray gun; 5. a roasting furnace; 6. a lamination valve; 7. a return valve; 8. a blow-down valve; 9. branch pipe liquid inlet valve; 10. a main pipe liquid inlet valve; 11. and (3) a water inlet valve.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention will be further illustrated, but is not limited, by the following examples.
The invention provides an anti-crystallization blocking intelligent acid regeneration system, which comprises a pre-concentrator 1 and a roasting furnace 5, wherein an air outlet of the roasting furnace 5 is connected with the top of the pre-concentrator 1 through a flue gas pipeline, a liquid outlet end of the pre-concentrator 1 is connected with a top spray gun 4 of the roasting furnace 5 through a roasting feed pipeline, a pre-concentration circulating pump 2 is arranged on the pre-concentration circulating pipeline, a roasting furnace feed pump 3 is arranged on the roasting feed pipeline, the pre-concentration circulating pipeline and the roasting feed pipeline share a section of pipeline connected with the liquid outlet end of the pre-concentrator 1, a laminating valve 6 is also arranged on the roasting feed pipeline, a sewage pipeline with a sewage draining valve 8 is connected on the connecting pipeline between the roasting furnace feed pump 3 and the laminating valve 6, a liquid inlet module is arranged between the roasting feed pipeline and the top spray gun 4 of the roasting furnace 5, a return pipeline is arranged on the connecting pipeline between the roasting furnace feed pump 3 and the liquid inlet module, and the output end of the return pipeline is connected with the bottom of the pre-concentrator 1, and the return pipeline is provided with a return valve 7.
As shown in FIG. 1, the preconcentrator 1 is connected with the roasting furnace 5 through a roasting feed pipeline, the bottom end and the top end of the preconcentrator 1 are connected through a preconcentration circulation pipeline, the whole pipeline of the acid regeneration system is divided into a first pipeline, a second pipeline and a roasting feed, a preconcentration circulation and a return output pipeline, the first pipeline is connected with the return output pipeline to form the preconcentration circulation pipeline, the first pipeline, the second pipeline and the roasting feed output pipeline are sequentially connected to form the roasting feed pipeline, the first pipeline, the second pipeline and the return output pipeline are sequentially connected to form the return pipeline, namely the roasting feed pipeline and the preconcentration circulation pipeline share the first pipeline, the roasting feed pipeline and the return pipeline share the first pipeline and the second pipeline, the roasting feed pump 3 is used as a power pump for roasting feed and acid washing liquid return, the opening and closing of the roasting feed pipeline are controlled through the operation of the pressure-superposed valve 6, the opening and closing of the return pipeline are controlled through the operation of the return valve 7, the acid is fed into the roasting furnace 5 spray gun 4 in a production mode by using the feed liquid module, the brine is fed into the roasting feed pipeline in a washing mode, the brine is enabled to have the same effect of reducing the difficulty of crystallizing and regenerating acid, the system is enabled to be more effectively controlled by using the same, the acid regeneration system is prevented from being cleaned, and the waste liquid is more convenient to realize, and the automatic control system is more convenient to clean and has the function of the acid system.
The arrangement of the return pipeline not only keeps the pipeline stably running in the production and feeding process of the acid regeneration system, but also is matched with the blow-down valve 8 to discharge the residual acid waste liquid in the pipeline, so that the pipeline can be emptied in time when an emergency stop is carried out, and the residual acid waste liquid is used as a drainage branch pipe when desalted water is reversely fed for cleaning, so that the drainage is carried out in the preconcentrator 1, the pipeline is kept stably running, the running safety of the system is improved, and meanwhile, a plurality of branch pipes are not required to be added for stabilizing the pipeline pressure, thereby being beneficial to simplifying the pipeline structure of the system.
Wherein, pretreatment circulating pump 2 sets up in the output pipeline of preconcentration circulation, and reflux valve 7 sets up in the output pipeline of backward flow, and roasting furnace feed pump 3 sets up on the second pipeline.
As a concrete implementation mode of the liquid inlet module structure, the liquid inlet module comprises a feeding main pipe, a feeding branch pipe and a water inlet branch pipe, wherein the feeding main pipe is connected with the same end of the feeding branch pipe after being connected in parallel with the water inlet branch pipe, the other end of the feeding branch pipe is connected with a roasting feeding pipeline, the feeding main pipe is connected with a top spray gun 4 of a roasting furnace 5, the water inlet branch pipe is connected with a desalted water inlet pipeline, as shown in figure 1, the feeding main pipe, the feeding branch pipe and the water inlet branch pipe are mutually communicated, the feeding branch pipe and the feeding main pipe are opened in a production mode, the water inlet branch pipe is closed, feeding is performed in a roasting furnace 5, the feeding branch pipe and the water inlet branch pipe are opened in a cleaning mode, the feeding main pipe is closed, desalted water reversely flows in along the roasting feeding pipeline, and feeding and water inlet functions of the liquid inlet module are realized.
In order to control the opening and closing of each pipeline, a main pipe liquid inlet valve 10 is arranged on a feeding main pipe, a branch pipe liquid inlet valve 9 is arranged on a feeding branch pipe, and water inlet valves 11 are arranged on water inlet branch pipes.
In order to realize intelligent control, the pressure-superposed valve 6, the reflux valve 7, the blow-down valve 8, the main pipe liquid inlet valve 10, the branch pipe liquid inlet valve 9 and the water inlet valve 11 are all self-control valves, and the self-control valves are all controlled by a control system of the acid regeneration system so as to realize intelligent operation of the acid regeneration system.
In order to detect the pressure or flow of each pipeline in real time, detectors for detecting the pressure or flow in the pipeline are arranged on the pre-concentration circulating pipeline, the connecting pipeline of the pressure-superposed valve 6, the connecting pipeline of the reflux valve 7, the feeding main pipe and the feeding branch pipe, so that the pressure or flow in the pipeline is ensured to be stable in intelligent operation, and the safety of system operation is improved.
The invention also provides an operation method of the crystallization blocking prevention intelligent acid regeneration system, which comprises automatic start operation and emergency shutdown cleaning;
the automatic starting operation is specifically as follows: after the waste liquid in the pre-concentrator 1 reaches the pump starting liquid level, the pre-concentration circulating pump 2 is automatically started to start pre-concentration circulation;
after the running pressure or flow of the pretreatment circulating pipeline is stable, automatically opening the lamination valve 6 to start liquid supply to the roasting furnace feed pump 3, and automatically starting the roasting furnace feed pump 3;
after the running pressure of the feeding pump 3 of the roasting furnace is stable, automatically opening a return pipeline to keep the stable running pressure and flow of the feeding pump 3 of the roasting furnace;
when the system is switched into a production mode, an acid inlet end and an acid outlet end of the liquid inlet module are automatically opened, liquid is fed into the spray gun 4 at the top of the roasting furnace 5, and when the liquid inlet flow or pressure of the spray gun 4 is stable, the reflux valve 7 is automatically closed;
the emergency shutdown cleaning specifically comprises the following steps:
when the roasting furnace is stopped or in emergency stop, the feeding pump 3 of the roasting furnace is stopped, the pressure-superposed valve 6 is automatically closed, the spray gun 4 is automatically stopped, a sewage discharge pipeline and/or a return pipeline are automatically opened, and residual liquid in the pipeline is emptied;
the system enters an automatic cleaning state, automatically closes the acid outlet end of the liquid inlet module, opens the water inlet end of the liquid inlet module, and washes the roasting feeding pipeline by water entering from the water inlet end to the acid inlet end;
when the flushing effluent becomes clear, the reflux valve 7, the blow-down valve 8 and the desalted water inlet pipeline are automatically closed until the next period of production is started.
According to the operation method of the crystallization blocking prevention intelligent acid regeneration system, provided by the invention, through setting two operation modes of automatic starting operation and emergency shutdown cleaning, a pre-concentration circulation pipeline, a reflux pipeline and a roasting supply pipeline are gradually opened in the automatic starting operation mode, so that the stable operation of the production of the acid regeneration system is ensured, and in the emergency shutdown cleaning mode, water is reversely fed along the original roasting supply pipeline, and the eluate is discharged by utilizing the action of gravity, so that the intelligent operation of the acid regeneration system is realized, the operation is simple, the system structure is simple, the energy consumption is small, the pipe pressure is stable, and the operation safety is greatly improved.
More specifically, when the automatic start operation is performed, the branch pipe liquid inlet valve 9 and the main pipe liquid inlet valve 10 in the liquid inlet module are automatically opened, namely the acid inlet end and the acid outlet end of the liquid inlet module are automatically opened;
when the emergency shutdown is carried out, the main pipe liquid inlet valve 10 in the liquid inlet module is automatically closed, the desalted water inlet valve 11 is automatically opened, namely, the acid outlet end of the liquid inlet module is automatically closed and the water inlet end of the liquid inlet module is opened.
In order to ensure that the pre-concentration circulating pipeline and the other two pipelines run stably at the same time, in the automatic starting operation, when the pre-concentration circulating pump 2 runs stably, the roasting furnace feed pump 3 can be started, so that the two pumps are prevented from being started simultaneously, and the flow in the pre-concentration circulating pipeline is greatly reduced due to the operation of the roasting furnace feed pump 3.
In order to avoid residual acid liquor crystallization in the cleaned pipe, after the flushing discharge liquor becomes clear, the reflux valve 7 and the blow-off valve 8 are closed firstly, and then the desalted water inlet pipeline is closed; before the next cycle of production, the drain valve 8 is opened to drain the stored water in the equipment and pipeline.
More specifically, after the reflux valve 7 and the blow-off valve 8 are automatically closed, the desalting water valve is closed after the pressure reaches 0.25-0.3 Mpa. The pressure is the front pressure of the desalting water valve, a regulating valve and a pressure gauge are arranged in front of the desalting water valve, and when the value on the pressure gauge reaches 0.25-0.3 Mpa, the desalting water valve is closed.
Wherein the desalted water can be replaced by pure water.
In order to collect acid liquid more conveniently, the tail end of the emptying pipeline is provided with a special collecting device, the effective volume of the special collecting device is not less than 1.5-2 times of the total volume of each device and pipeline in the acid regeneration system, and the collecting device is prevented from generating a full overflow state during collection, wherein the collecting device can adopt an acid pit or an acid storage tank.
Wherein, the preconcentrator 1 and the collecting device are connected with the original storage device of the acid liquor, and the acid liquor in the collecting device reaches a certain liquid level and can flow back to the original storage device of the acid liquor for standby so as to be treated in the next period of production.
In a specific extended embodiment, the pickling waste acid liquid firstly enters the pre-concentrator 1 to reach the pump starting liquid level, the pre-concentration circulating pump 2 is started, and the waste pickling liquid entering the pre-concentrator 1 and the waste heat of the high-temperature flue gas are fully subjected to heat exchange by utilizing the waste heat of the high-temperature flue gas generated by the roasting furnace 5, so that the waste pickling liquid can be efficiently concentrated. After the operation pressure or flow of the pre-concentration system is stable, the stacking valve 6 is automatically opened, the stacking is started to supply liquid to the feeding pump 3 of the roasting furnace, then the feeding pump 3 of the roasting furnace is started, the spray gun 4 system is opened to exhaust, after the operation pressure of the feeding pump 3 of the roasting furnace is stable, the spray gun 4 is closed, the reflux valve 7 is automatically opened, and the stable and reliable operation of the feeding pipeline of the roasting furnace 5 is maintained. When the feeding pipeline of the roasting furnace 5 is stable, the whole system is switched into a production mode, a feeding branch pipe liquid inlet valve 9 and a feeding main pipe liquid inlet valve 10 of a feeding system of the roasting furnace 5 are automatically opened, and when the liquid inlet flow or pressure of a spray gun 4 system is stable, a reflux valve 7 is automatically closed, so that the stable production of an acid treatment system is ensured;
when stopping or emergency stopping, the roasting furnace feed pump 3 stops running, the pressure-superposed valve 6 is automatically closed immediately, and the reflux valve 7 and/or the blow-down valve 8 are automatically opened. At this time, the spray gun 4 also stops spraying immediately, the feed header pipe liquid inlet valve 10 is automatically closed, the desalted water inlet valve 11 is automatically opened, and desalted water or pure water reversely washes the roasting feed pipeline through the desalted water inlet valve 11 and the feed branch pipe liquid inlet valve 9, so that the concentrated acid is prevented from crystallizing and precipitating in the pipeline, and equipment and the pipeline are prevented from being blocked. When the flushing effluent is basically clean, the desalted water inlet valve 11 and the feed branch pipe liquid inlet valve 9 are automatically closed, the reflux valve 7 and/or the blow-off valve 8 are automatically closed, and the concentrated acid equipment and the pipeline are kept to store proper amount of desalted water or purified water until the next period of production is started.
Wherein, when only the reflux valve 7 is opened, the discharged liquid is discharged into the preconcentrator 1 for storage under the action of gravity; in the case of opening only the blow-down valve 8, the effluent is discharged under gravity into a special collection device for storage, such as an acid pit or an acid storage tank; with both the return valve 7 and the blow down valve 8 open, the effluent is discharged under gravity partly into the preconcentrator 1 and partly into a dedicated collecting device. In the three cases described above, the return valve 7 and/or the drain valve 8, which were opened before the cleaning was completed, are closed.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the teachings of the present invention, which are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides an intelligent acid regeneration system of anti-crystallization jam, includes preconcentrator and roasting furnace, the gas outlet of roasting furnace pass through the flue gas pipeline with the top of preconcentrator is connected, the liquid outlet end of preconcentrator passes through preconcentration circulation pipeline and connects the top of preconcentrator, the liquid outlet end of preconcentrator passes through roasting feed pipe and connects the top spray gun of roasting furnace, be provided with the preconcentration circulating pump on the preconcentration circulation pipeline, be provided with roasting furnace feed pump on the roasting feed pipe, its characterized in that, the preconcentration circulating pipeline with roasting feed pipe shares one section with the pipeline that the liquid outlet end of preconcentrator links to each other, roasting feed pipe still is provided with the pressure-superposed valve, roasting feed pipe's the extreme low end is connected with the blow off pipeline that has the blow off valve, be provided with the feed liquor module between the top spray gun of roasting furnace, be connected with the desalted water feed line on the feed liquor module, be connected with the return line between roasting furnace feed pump and the feed liquor module, the return line is connected with the return line, the return line is provided with the output of preconcentrator on the return line.
2. The anti-crystallization blocking intelligent acid regeneration system according to claim 1, wherein the liquid inlet module comprises a feeding main pipe, a feeding branch pipe and a water inlet branch pipe, the feeding main pipe and the water inlet branch pipe are connected in parallel and then connected with the same end of the feeding branch pipe, the other end of the feeding branch pipe is connected with the roasting feeding pipeline, the feeding main pipe is connected with a top spray gun of the roasting furnace, and the water inlet branch pipe is connected with the desalted water inlet pipeline.
3. The anti-crystallization blocking intelligent acid regeneration system according to claim 2, wherein a main pipe liquid inlet valve is arranged on the main supply pipe, a branch pipe liquid inlet valve is arranged on the branch supply pipe, and water inlet valves are arranged on the water inlet branch pipes.
4. The anti-crystallization blocking intelligent acid regeneration system according to claim 3, wherein the pressure-superposed valve, the reflux valve, the blow-down valve, the main pipe liquid inlet valve, the branch pipe liquid inlet valve and the water inlet valve are all self-control valves.
5. The crystallization blocking prevention intelligent acid regeneration system according to claim 4, wherein detectors for detecting pressure or flow in the pipe are provided on the pre-concentration circulation line, the connection line of the pressure-superposed valve, the connection line of the reflux valve, the feed header pipe and the feed branch pipe.
6. An operation method of an anti-crystallization blocking intelligent acid regeneration system is characterized by comprising automatic start operation and emergency stop cleaning;
the automatic starting operation specifically comprises the following steps: after the waste liquid in the pre-concentrator reaches the liquid level of the starting pump, the pre-concentration circulating pump is automatically started, and the pre-concentration circulation is started;
after the running pressure or flow of the pretreatment circulating pipeline is stable, automatically opening the pressure-superposed valve to start liquid supply to the feeding pump of the roasting furnace, and automatically starting the feeding pump of the roasting furnace;
after the running pressure of the feeding pump of the roasting furnace is stable, automatically opening a return pipeline to keep the stable running pressure and flow of the feeding pump of the roasting furnace;
when the system is switched into a production mode, an acid inlet end and an acid outlet end of the liquid inlet module are automatically opened, liquid is fed into a spray gun at the top of the roasting furnace, and when the liquid inlet flow or pressure of the spray gun is stable, the reflux valve is automatically closed;
the emergency shutdown cleaning specifically comprises the following steps:
when the roasting furnace is stopped or in emergency stop, the feeding pump of the roasting furnace is stopped, the pressure-superposed valve is automatically closed, the spray gun is automatically stopped to spray, the sewage discharge pipeline and/or the return pipeline are automatically opened, and the residual liquid in the pipeline is emptied;
the system enters an automatic cleaning state, automatically closes the acid outlet end of the liquid inlet module, opens the water inlet end of the liquid inlet module, and washes the roasting feeding pipeline by water entering from the water inlet end to the acid inlet end;
when the flushing effluent becomes clear, the reflux valve, the blow-down valve and the desalted water inlet pipeline are automatically closed until the next period of production is started.
7. The method for operating an anti-crystallization and anti-clogging intelligent acid regeneration system according to claim 6, wherein the manifold inlet valve and the manifold inlet valve in the inlet module are automatically opened when the operation is automatically started;
when the emergency shutdown is carried out, a main pipe liquid inlet valve in the liquid inlet module is automatically closed, and a water inlet valve is automatically opened.
8. The method of claim 6, wherein the furnace feed pump is started when the pre-concentration circulation pump is stable in the automatic start-up operation.
9. The method of claim 6, wherein the return valve and the drain valve are closed and the desalted water inlet line is closed after the flushing effluent is cleared; before the next period of production, the blow-down valve is opened to discharge the stored water in the equipment and the pipeline.
10. The method of claim 9, wherein the desalination valve is closed after the reflux valve and the blowdown valve are automatically closed when the rinse effluent becomes clear, and the desalination valve is closed after the pressure reaches 0.25-0.3 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311621140.6A CN117427351A (en) | 2023-11-30 | 2023-11-30 | Intelligent acid regeneration system capable of preventing crystallization blockage and operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311621140.6A CN117427351A (en) | 2023-11-30 | 2023-11-30 | Intelligent acid regeneration system capable of preventing crystallization blockage and operation method |
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| Publication Number | Publication Date |
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| CN117427351A true CN117427351A (en) | 2024-01-23 |
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| CN202311621140.6A Pending CN117427351A (en) | 2023-11-30 | 2023-11-30 | Intelligent acid regeneration system capable of preventing crystallization blockage and operation method |
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| Country | Link |
|---|---|
| CN (1) | CN117427351A (en) |
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2023
- 2023-11-30 CN CN202311621140.6A patent/CN117427351A/en active Pending
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