CN220559188U - Comprehensive gas recycling system in caustic soda flake production - Google Patents

Abstract

The application relates to the technical field of caustic soda flake production, and discloses a comprehensive gas recycling system in caustic soda flake production. The gas generating device is arranged, the gas is introduced into each hearth, and the main pipeline is arranged to comprehensively recycle the flue gas and the alkali steam generated in the plurality of cooking groups, so that the air inducing can be performed only by arranging a negative pressure fan at the tail end of the main pipeline. And the heat exchanger is arranged, so that the high-temperature flue gas and alkali vapor in the main pipeline and the low-temperature alkali liquor in the feeding pipe exchange heat, and the heating time can be saved. And after the flue gas and alkali steam in the main pipeline are cooled at the heat exchanger, liquefied alkaline water can be introduced into the collecting tank for recovery, so that on one hand, the pollution to the environment is avoided, and on the other hand, the alkaline water in the recovering tank can be used for replacing cooling water to perform cooling spraying and other operations in the whole production system, so that the water consumption is saved.

Description

Comprehensive gas recycling system in caustic soda flake production

Technical Field

The application relates to the technical field of caustic soda flake production, in particular to a comprehensive gas recycling system in caustic soda flake production.

Background

A caustic soda flakes; the chemical name sodium hydroxide, white semitransparent flake solid, is basic chemical raw material, and is widely used in papermaking, synthetic detergent, soap, viscose fiber, rayon, cotton and other light spinning industry.

In the process of producing the caustic soda flakes, the caustic soda flakes are prepared by adding liquid caustic soda into a digester for evaporation, and changing the caustic soda flakes into caustic soda flakes after evaporating water. In the traditional large-scale pan method caustic soda flake manufacturing process, coal is directly combusted in a stove table to provide heat, a digester is erected at the top of the stove table to cook caustic soda flake raw materials, each production line is provided with a small chimney for discharging smoke independently, smoke generated by the combustion of the coal in the stove table is discharged, and the caustic soda at the top of the digester is directly discharged into the air.

It can be seen that the following problems exist in the prior art;

1. directly burning coal in a hearth will produce slag, coal ash and the like, which causes difficult cleaning, causes mess of the whole production environment and additionally increases cleaning cost.

2. Each stove table and each digester are mutually independent, and coal and smoke are required to be added independently, so that the operation is complicated, and the labor capacity is increased.

3. The alkali steam generated by heating in the cooking process is discharged outdoors and cannot be recycled.

4. The smoke dust discharged by the small chimney contains a large amount of heat energy and cannot be effectively utilized.

Disclosure of Invention

In view of the above problems, the embodiment of the application provides a comprehensive gas recycling system in caustic soda flake production, which can realize convenient operation, reduce labor cost, be environment-friendly and save energy in caustic soda flake production.

According to one aspect of the embodiments of the present application, a comprehensive gas recycling system in caustic soda flake production is provided. The utility model provides a comprehensive gas recycle system in caustic soda production includes a plurality of cooking groups, heat exchanger, gas generator and alkali lye ground jar, the heat exchanger includes first connecting tube and second connecting tube, the cooking group includes at least one stove table, the top of stove table has set up the boiling pot, the top of boiling pot is connected with the evaporating pipe, and a plurality of the evaporating pipe is connected with a trunk line jointly, gas generator communicates respectively at a plurality of through the pipeline the air intake of stove table, the air outlet of stove table communicate in through the pipeline the trunk line, the end-to-end connection of trunk line in the first connecting tube of heat exchanger, the end branch of first connecting tube is outlet pipe and outlet duct, the outlet duct intercommunication has the chimney, the outlet pipe is connected with the collecting vat, the alkali lye ground jar communicates through the charging tube has at least one preheating pot, the middle part of charging tube communicate in the second connecting tube, the drain of preheating pot communicate in the boiling pot.

In some embodiments, the furnace platform comprises an air supply pipe, wherein the head end of the air supply pipe is communicated with an air inlet fan, and the tail ends of the air supply pipe are respectively communicated with air inlets of a plurality of furnace platforms.

In some embodiments, the air outlet pipe is communicated with a negative pressure fan, and the air outlet end of the negative pressure fan is communicated with the chimney.

In some embodiments, one of the cooking groups includes a plurality of stovetops, the stovetops being connected in series with each other, the stovetops at the head end being connected to the gas generator by a pipe, the stovetops at the tail end being connected to the main pipe by a pipe, correspondingly, the cookers at the same one of the cooking groups being connected in series, the cookers at the head end being connected to the preheating tank, the cookers at the tail end being connected to the main pipe by a pipe.

In some embodiments, the cooking pans at the ends of the plurality of cooking groups are connected with a discharge pipe, the other ends of the discharge pipes are connected with a pelleter, the pelleter is connected with a packaging machine through a stranding cage, and the stranding cage is connected with the main pipeline through a pipeline.

In some embodiments, a plurality of said digesters located in the same said digester are connected in series with each other by submerged pumps and pipes.

In some embodiments, a first spraying device is arranged in the inner cavity of the main pipeline, the first spraying device comprises a plurality of spraying ports, a water injection pipe is externally connected with the spraying device, and the water injection pipe extends to the outer side of the main pipeline.

In some embodiments, the collection tank is in communication with the water injection pipe via a pump and a conduit.

In some embodiments, a second spraying device is arranged in the wringing cage, and the second spraying device is communicated with the inside of the collecting tank through a pump and a pipeline.

In some embodiments, a spray cleaning device is provided at the oven floor, and the collection tank is in communication with the spray cleaning device through a pump and a pipe.

The beneficial effects in this application are: in this application embodiment, through setting up gas generator and introducing each stove top with gas to mix the recovery through setting up flue gas and the alkali steam that produce in a plurality of cooking groups, only need set up a negative pressure fan in the end of trunk line and can carry out "induced air" from this, make the gas in each stove top burn, and take out the alkali steam that evaporates in the digester, consequently do not need to take care of each stove top independently and carry out operations such as go on coal. And the heat exchanger is arranged, so that the high-temperature flue gas and alkali vapor in the main pipeline and the low-temperature alkali liquor in the feeding pipe exchange heat, the initial heat of the alkali liquor is further improved, and when the alkali liquor is added into the digester from the preheating tank, the heating time can be saved due to the higher initial temperature. And after the flue gas and alkali steam in the main pipeline are cooled at the heat exchanger, liquefied alkaline water can be introduced into the collecting tank for recovery, so that on one hand, the pollution to the environment is avoided, and on the other hand, the alkaline water in the recovering tank can be used for replacing cooling water to perform cooling spraying and other operations in the whole production system, so that the water consumption is saved.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of a comprehensive gas recycling system in caustic soda flake production according to an embodiment of the present application;

fig. 2 is a schematic diagram of the embodiment of the present application with a spraying device and omitting part of the structure and the pipes.

Reference numerals in the specific embodiments are as follows:

the comprehensive gas recycling system 1000 in caustic soda flake production comprises a cooking set 100, a furnace table 110, a spray cleaning device 111, a cooking pot 120, an evaporation tube 121, a heat exchanger 200, a first connecting pipeline 210, a second connecting pipeline 220, a gas generating device 300, an alkaline lye ground tank 400, a feeding pipe 410, a preheating tank 420, a main pipeline 500, a water outlet pipe 510, a collecting tank 511, an air outlet pipe 520, a chimney 521, a negative pressure fan 522, a first spray device 530, spray openings 531, a water injection pipe 532, an air supply pipe 600, an air inlet fan 610, a discharge pipe 700, a flaker 800, a stranding cage 850, a second spray device 851 and a packaging machine 900.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

Specifically, referring to fig. 1, fig. 1 is a schematic diagram of an overall structure of a comprehensive gas recycling system in caustic soda flake production according to an embodiment of the present application. The comprehensive gas recycling system 1000 in caustic soda flake production comprises a plurality of cooking groups 100, heat exchangers 200, gas generating devices 300 and alkali liquor ground tanks 400, and specifically, the number of the cooking groups 100 can be increased or decreased according to actual production conditions. The gas generating device 300 is used for generating gas and further supplying the gas into the furnace platform 110 for combustion. Lye ground tank 400 is used to store lye where lye ground tank 400 includes, but is not limited to, a tank created by excavation, and the like. The heat exchanger 200 includes a first connection pipe 210 and a second connection pipe 220, and fluids in the first connection pipe 210 and the second connection pipe 220 are independent of each other and do not directly contact each other during circulation, and exchange heat only through the first connection pipe 210 and the second connection pipe 220. The cooking group 100 comprises at least one stove table 110, a cooking pot 120 is arranged on the top of the stove table 110, an evaporation pipe 121 is connected to the top of the cooking pot 120, a main pipeline 500 is commonly connected to the evaporation pipes 121, and the main pipeline 500 can collect alkali vapor, water vapor and the like which are steamed in the cooking pot 120. The gas generating device 300 is respectively communicated with the air inlets of the plurality of furnace benches 110 through pipelines, the gas generated by the gas generating device 300 enters the furnace benches 110 from the air inlets and then burns in the furnace benches 110, heat energy is sequentially generated to heat the digester 120, the air outlets of the furnace benches 110 are communicated with the main pipeline 500 through pipelines, and flue gas formed after the gas burns enters the main pipeline 500 to finish collection. The end of the main pipe 500 is connected to the first connection pipe 210 of the heat exchanger 200, the end of the first connection pipe 210 is branched into a water outlet pipe 510 and a water outlet pipe 520, and flue gas formed by burning gas and alkali vapor evaporated from the digester 120 are mixed in the main pipe 500. The flue gas and the alkali vapor are cooled after heat exchange by the heat exchanger 200. The gas outlet pipe 520 is communicated with a chimney 521, and after the gas and alkali vapor are cooled and liquefied at the heat exchanger 200, the residual smoke dust and gas enter the chimney 521 through the gas outlet pipe 520 and are discharged to the atmosphere after being treated by the chimney 521. The water outlet pipe 510 is connected with a collecting tank 511, and the liquefied alkali-containing water enters the collecting tank 511 for collection. It should be noted here that: the alkali content in the alkaline water is low, so that the corrosion effect on the pipeline is limited, and the general corrosion-resistant treatment is adopted. The lye ground tank 400 is communicated with at least one preheating tank 420 through a feeding pipe 410, the middle part of the feeding pipe 410 is communicated with the second connecting pipeline 220, the liquid outlet of the preheating tank 420 is communicated with the digester 120, lye is preferentially passed through the heat exchanger 200 before entering the preheating tank 420, the temperature of the lye is lower, and the temperature of flue gas and alkali steam in the main pipeline 500 is higher, so that the temperature of the lye rises in the heat exchange process at the heat exchanger 200. The liquid alkali can be supplemented into the digester 120 through a pipeline after entering the preheating tank 420.

As can be seen from the above, in the embodiment of the present application, by setting the gas generating device 300 and introducing the gas into each of the stove platforms 110, and by setting the main pipe 500 to comprehensively recycle the flue gas, alkali steam and steam generated in the plurality of cooking groups 100 after mixing, the "induced draft" can be performed only by setting a negative pressure fan 522 at the end of the main pipe 500, so that the gas in each stove platform 110 can be combusted, and the alkali steam distilled out of the cooking pot 120 can be simultaneously extracted, and the mode of synchronously recycling the various gases after mixing in the main pipe 500 is greatly simplified, and the operations such as feeding the coal do not need to be performed by independently nursing each stove platform 110. In this embodiment, the heat exchanger 200 is further provided, so that the high-temperature flue gas and alkali vapor in the main pipeline 500 and the low-temperature alkali liquor in the feeding pipe 410 exchange heat, and thus the initial heat of the alkali liquor is improved, and when the alkali liquor is added to the digester 120 from the preheating tank 420, the heating time can be saved due to the higher initial temperature. After the temperature of the flue gas and the alkali vapor in the main pipeline 500 is reduced at the heat exchanger 200, the liquefied alkaline water can be introduced into the collecting tank 511 for recycling, so that on one hand, environmental pollution is avoided, on the other hand, the alkaline water in the recycling tank can be utilized to replace cooling water for cooling, spraying and other operations in the whole production system, and water consumption is saved.

In some embodiments, the air supply pipe 600 is included, the air inlet fan 610 is connected to the head end of the air supply pipe 600, and the tail ends of the air supply pipe 600 are respectively connected to the air inlets of the plurality of furnace platforms 110. In the embodiment of the application, by arranging the blast pipe 600 and the air intake fan 610 to guide air into the hearth 110 and to burn gas at the hearth 110, the combustion efficiency is enhanced.

In some embodiments, a negative pressure fan 522 is connected to the air outlet pipe 520, and the air outlet end of the negative pressure fan 522 is connected to the chimney 521. In the embodiment of the present application, a negative pressure is provided to the main pipe 500 by the negative pressure fan 522, so that the alkali vapor in the digester 120 and the flue gas generated by combustion in the oven 110 can be conveniently and rapidly pumped out.

In some embodiments, one cooking group 100 includes a plurality of hearths 110, the plurality of hearths 110 are connected in series, the hearths 110 at the head end are connected to the gas generating apparatus 300 through a pipeline, the hearths 110 at the tail end are connected to the main pipeline 500 through a pipeline, correspondingly, the plurality of cookers 120 of the same cooking group 100 are connected in series, the cookers 120 at the head end are connected to the preheating tank 420, and the cookers 120 at the tail end are connected to the main pipeline 500 through a pipeline. In the embodiment of the application, the plurality of the furnace platforms 110 and the cooking pans 120 are arranged on one cooking group 100, so that the cooking efficiency of liquid alkali is increased, and the plurality of the furnace platforms 110 and the plurality of the cooking pans 120 are respectively connected in series, so that independent nursing is not needed, the operation is simple, and the labor capacity is reduced.

In some embodiments, the cooking pans 120 at the ends of the plurality of cooking groups 100 are communicated with a discharge pipe 700, the other ends of the discharge pipes 700 are communicated with a pelleter 800, the pelleter 800 is connected with a packaging machine 900 through a stranding cage 850, and the stranding cage 850 is communicated with the main pipeline 500 through a pipeline. In this application embodiment, through above-mentioned setting, the liquid caustic soda that the digestion was accomplished will send into pelleter 800 through discharging pipe 700 and carry out the film-making, send into packagine machine 900 by hank cage 850 after the film-making is accomplished and pack for this application degree of automation effectively improves.

In some embodiments, multiple cookers 120 located in the same cooking group 100 are serially connected to each other by submerged pumps and pipes. The embodiment of the present application provides a way to connect a plurality of cooking pans 120 in the same cooking group 100 in series, and the liquid alkali in two adjacent cooking pans 120 can be conveniently pumped into another cooking pan 120 through a submerged pump and a pipeline.

In some embodiments, please continue to refer to fig. 1 with further reference to fig. 2, fig. 2 is a schematic diagram provided in the embodiments of the present application with a spraying device and omitting part of the structure and the pipes. For clarity of illustration, fig. 2 omits portions of the piping and structures. The inner cavity of the main pipeline 500 is internally provided with a first spraying device 530, the first spraying device 530 comprises a plurality of spraying ports 531, the spraying device is externally connected with a water injection pipe 532, and the water injection pipe 532 extends to the outer side of the main pipeline 500.

In this embodiment of the present application, through the above-mentioned setting, set up first spray set 530 in trunk line 500, the accessible sprays liquid water or contains the alkaline water that condenses the recovery in collecting vat 511 and sprays trunk line 500, and then on the one hand can spray the impurity in the trunk line 500 and dispel, on the other hand plays the effect of spraying the cooling.

In some embodiments, please continue to refer to fig. 2. The collection tank 511 is connected to the water injection pipe 532 by a pump and a pipe. In the embodiment of the application, through the arrangement, the alkaline water in the collecting tank 511 enters the water injection pipe 532 through the pipeline and is further sprayed out through the spraying opening 531, so that the recovered alkaline water can be utilized to replace cooling water, and the purpose of saving water resources is achieved.

In some embodiments, please continue to refer to fig. 2. The second spraying device 851 is arranged in the wringing cage 850, the wringing cage 850 and the second spraying device 851 are all in the prior art, and the second spraying device 851 is communicated with the inside of the collecting tank 511 through a pump and a pipeline. The winch cage 850 is divided into an inner sleeve and an outer sleeve, materials are transported in the inner sleeve, the second spraying device 851 is arranged at the outer sleeve of the winch cage 850 and faces the outer wall of the inner sleeve, and as the tablet alkali still has higher temperature after the tablet making of the tablet making machine 800 is completed, the device can spray recycled alkali-containing water in the winch cage 850 to play a role in cooling, and the sprayed alkali-containing water can be led into the collecting tank 511 again through an external pipeline.

In some embodiments, referring still to fig. 2, a spray cleaning device 111 is provided at the oven floor 110, and the collection tank 511 is in communication with the spray cleaning device 111 via a pump and a pipe. In the embodiment of the application, the recovered alkaline water can be sprayed to the position of the furnace platform 110 for cleaning and cooling, and the aim of saving water resources can be achieved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; while the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. The comprehensive gas recycling system in caustic soda flake production is characterized by comprising a plurality of cooking groups, a heat exchanger, a gas generating device and an alkaline liquor ground tank, wherein the heat exchanger comprises a first connecting pipeline and a second connecting pipeline, the cooking groups comprise at least one stove table, a cooking pot is arranged at the top of the stove table in a supporting mode, an evaporating pipe is connected to the top of the cooking pot, and a main pipeline is commonly connected to the evaporating pipes;

the gas generating device is respectively communicated with the air inlets of the plurality of furnace benches through pipelines, the air outlets of the furnace benches are communicated with the main pipeline through pipelines, the tail end of the main pipeline is connected with a first connecting pipeline of the heat exchanger, the tail end of the first connecting pipeline is branched into a water outlet pipe and an air outlet pipe, the air outlet pipe is communicated with a chimney, and the water outlet pipe is connected with a collecting tank;

the alkaline liquor ground tank is communicated with at least one preheating tank through a feeding pipe, the middle part of the feeding pipe is communicated with the second connecting pipeline, and the liquid outlet of the preheating tank is communicated with the digester.

2. The comprehensive gas recycling system in caustic soda flake production according to claim 1, comprising an air supply pipe, wherein the head end of the air supply pipe is communicated with an air inlet fan, and the tail ends of the air supply pipe are respectively communicated with air inlets of a plurality of furnace platforms.

3. The comprehensive gas recycling system in caustic soda flake production of claim 1, wherein a negative pressure fan is communicated with the gas outlet pipe, and the air outlet end of the negative pressure fan is communicated with the chimney.

4. The integrated gas recycling system in caustic soda flake production of claim 1, wherein one of the digestion sets comprises a plurality of ovens, the ovens at the head end are connected in series with each other, the ovens at the tail end are connected to the gas generating device through pipes, the ovens at the tail end are connected to the main pipe through pipes, correspondingly, a plurality of digesters at the same digestion set are connected in series, the digesters at the head end are connected to the preheating tank, and the digesters at the tail end are connected to the main pipe through pipes.

5. The integrated gas recycling system in caustic soda flake production of claim 4, wherein the cooking pans at the ends of the plurality of cooking groups are connected with a discharge pipe, the other ends of the discharge pipes are connected with a flaker, the flaker is connected with a packaging machine through a stranding cage, and the stranding cage is connected with the main pipeline through a pipeline.

6. The integrated gas recycling system in caustic soda flake production of claim 4, wherein a plurality of the digester vessels in the same digester bank are connected in series with each other by submerged pumps and pipes.

7. The comprehensive gas recycling system in caustic soda flake production according to claim 1, wherein a first spraying device is arranged in the inner cavity of the main pipeline, the first spraying device comprises a plurality of spraying ports, the spraying device is externally connected with a water injection pipe, and the water injection pipe extends to the outer side of the main pipeline.

8. The integrated gas recovery and utilization system for caustic soda flake production of claim 7, wherein the collection tank is in communication with the water injection pipe via a pump and a conduit.

9. The comprehensive gas recycling system in caustic soda flake production of claim 5, wherein a second spraying device is arranged in the wringing cage and is communicated with the inside of the collecting tank through a pump and a pipeline.

10. The comprehensive gas recycling system in caustic soda flake production according to claim 1, wherein a spray cleaning device is arranged at the furnace platform, and the collecting tank is communicated with the spray cleaning device through a pump and a pipeline.