CN115212596B - Device for heating pot-type sulfuric acid concentration device by using supersonic frequency and high-frequency electromagnetic induction - Google Patents
Device for heating pot-type sulfuric acid concentration device by using supersonic frequency and high-frequency electromagnetic induction Download PDFInfo
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- CN115212596B CN115212596B CN202210914117.5A CN202210914117A CN115212596B CN 115212596 B CN115212596 B CN 115212596B CN 202210914117 A CN202210914117 A CN 202210914117A CN 115212596 B CN115212596 B CN 115212596B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 60
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 9
- 239000010410 layer Substances 0.000 claims abstract description 41
- 239000011241 protective layer Substances 0.000 claims abstract description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims description 117
- 238000000926 separation method Methods 0.000 claims description 51
- 239000000945 filler Substances 0.000 claims description 33
- 229910001018 Cast iron Inorganic materials 0.000 claims description 23
- 229910052710 silicon Inorganic materials 0.000 claims description 22
- 239000010703 silicon Substances 0.000 claims description 22
- 239000004568 cement Substances 0.000 claims description 19
- 230000007797 corrosion Effects 0.000 claims description 19
- 238000005260 corrosion Methods 0.000 claims description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229920001342 Bakelite® Polymers 0.000 claims description 3
- 239000004637 bakelite Substances 0.000 claims description 3
- 229920002313 fluoropolymer Polymers 0.000 claims description 3
- 239000011491 glass wool Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000011490 mineral wool Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 238000005194 fractionation Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 241000209140 Triticum Species 0.000 description 2
- 235000021307 Triticum Nutrition 0.000 description 2
- 239000011473 acid brick Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000736911 Turritella communis Species 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/02—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in boilers or stills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/88—Concentration of sulfuric acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
A device for heating a pot-type sulfuric acid concentration device by using ultrasonic frequency and high-frequency electromagnetic induction relates to a device for providing heat energy for the pot-type sulfuric acid concentration device. The device is designed for mainly solving the problem of low heating efficiency of the device for providing heat energy for the pot-type sulfuric acid concentration device at present. The device comprises a concentrating pot, wherein a pot body and a pot cover of the concentrating pot are connected through a flange; the pot body is provided with a concentrated sulfuric acid outlet, and the outer wall of the pot body is provided with a heat preservation layer. The coil panel is arranged outside the heat preservation layer, the innermost layer of the coil panel is a protective layer, and the middle layer is an electromagnetic coil; the outermost layer is a ferrite magnetic sheet with a certain distance; the coil panel is hung on the flange of the pot body. The pot cover is provided with a manhole and a fractionating tower hole, and the fractionating tower is arranged on the fractionating tower hole. The pot body is arranged in the heating furnace, and the flange of the pot body is arranged on the supporting lugs in the heating furnace. The heating furnace is provided with a heating furnace cover plate and a furnace door, and two ends of a cable of the coil disc extend out of the side wall of the heating furnace and are connected with an output terminal wire column in the electromagnetic control cabinet. The advantage is high heating efficiency.
Description
Technical field:
the invention relates to a device for providing heat energy for a pot-type sulfuric acid concentration device, which is used in the concentration and distillation treatment of waste sulfuric acid in the fields of chemical industry and environmental protection.
The background technology is as follows:
the heat energy which can be provided for the pot-type sulfuric acid concentration device is as follows: natural gas, hydrogen, heavy oil, coal gas, resistance wire, infrared and the like are basically not used any more due to the improvement of environmental protection requirements, but clean energy is replaced by the coal, the coal gas and the heavy oil, the natural gas is clean and sanitary, the heat value is high, the natural gas is widely adopted, but the price fluctuation of fossil energy is large, and the electric energy is considered to be adopted if a certain factory area has no gas pipeline; some of the electric heating methods are ideal modes because of the safety requirements of factories and the limitation of open fire. The resistance heating has low thermal efficiency and short service life, and is not easy to resist corrosion and protect; the infrared heating efficiency is low, the energy density is low, and the infrared heating device cannot be used in high power; the intermediate frequency electromagnetic heating has low magnetic efficiency, affects the health, has high equipment processing and maintenance difficulty, consumes energy of the water-cooled cable and is easy to break down and break down.
In addition, there are fractionating towers used in the conventional pot sulfuric acid concentration device: acid brick lining towers, ceramic cylinder lining towers, high silicon cast iron bubble cap towers, integrated high silicon cast iron towers and the like. The acid-resistant brick lining tower and the ceramic cylinder lining tower are high in manufacturing difficulty, long in construction period, easy to leak, difficult to overhaul, short in service period and difficult to use for one year; the bubble caps of the high-silicon cast iron bubble cap tower are easily blocked by impurities in sulfuric acid, cannot operate, and have extremely short service cycle. The integral high silicon cast iron fractionating tower is easy to leak, easy to crack and troublesome to install and overhaul.
The invention comprises the following steps:
the technical problem to be solved by the invention is to provide a device for heating a pot-type sulfuric acid concentration device by using ultrasonic frequency and high-frequency electromagnetic induction, which is characterized by rapid and controllable heating, simple high-temperature resistant measures, easy corrosion resistant measures, soft coil materials, easy processing and shaping, small environmental pollution, high electromagnetic efficiency, difficult blockage of a fractionating tower by fine impurities, good protective performance and heat preservation performance by using ultrasonic frequency and high-frequency electromagnetic induction.
The purpose of the invention is realized in the following way: the device comprises a concentrating pot, wherein the concentrating pot comprises a pot body and a pot cover, two rings of flanges are fixed on the upper part of the pot body, the flange positioned above is connected with the flange on the pot cover through bolts, and a sealing gasket is clamped between the pot body and the pot cover; the side of the upper part of the pot body is provided with a concentrated sulfuric acid outlet, the outer wall of the pot body is fixed with a corrosion-resistant heat-insulating layer, and the corrosion-resistant heat-insulating layer is made of rock wool, glass wool and the like. The coil panel is arranged outside the heat-insulating layer, the coil panel is composed of three layers, the innermost layer is a protective layer, the protective layer is made of fluoroplastic or bakelite and other materials with the functions of corrosion resistance, insulation and special cable support, the middle layer is an electromagnetic coil (the electromagnetic coil is wound on the outer wall of the protective layer) made of special cable (wheat stay wire) discs, the special cable is a superfine copper wire with insulating paint on multiple cores, and the surface layer of the special cable is wrapped with the insulating protective layer; the outermost layer is a ferrite magnetic sheet which is stuck with a certain distance at intervals and is perpendicular to the electromagnetic coil; the protective layer is attached to the heat-insulating layer on the outer wall of the pot body. The coil panel is hung on a flange positioned below the top of the pot body.
The outer wall of the coil panel is provided with a temperature sensor (the temperature sensor is arranged on the cable to measure the temperature and prevent the cable from overtemperature).
The pot cover is provided with a manhole and a fractionating tower hole, the manhole cover is provided with a remote transmission type thermometer and a pressure gauge, the fractionating tower is arranged on the fractionating tower hole, the fractionating tower is a packed tower, and the top of the tower is provided with a compensator, a remote transmission type tower top thermometer and a tower top pressure gauge.
The pot body is arranged in the heating furnace, the upper part in the heating furnace is provided with a supporting lug, and the flange positioned below the upper part of the pot body is arranged on the supporting lug.
The top of the heating furnace is provided with a movable heating furnace cover plate, a manhole and a fractionating tower on the pot cover are exposed from the heating furnace cover plate, the side wall of the heating furnace is provided with a heating furnace door for overhauling, the lower part of the heating furnace is provided with an air inlet channel, the side wall of the heating furnace is provided with a corrosion-resistant axial flow fan, the bottom of the heating furnace is provided with a funnel-shaped liquid collecting pit, and the bottom of the liquid collecting pit is connected with a pipeline for removing an emergency pool. The liquid collecting pit is built by corrosion-resistant acid-proof concrete and acid-proof bricks, the heating furnace is provided with a closed shell made of non-magnetic materials, and the heat preservation and the organized collection of gas are carried out.
The two ends of the special cable of the coil panel extend out of the side wall of the heating furnace and then are connected with an output terminal in the electromagnetic control cabinet, a power frequency line is connected with an input terminal in the electromagnetic control cabinet, and a temperature sensor, a remote transmission type thermometer and a pressure gauge on a manhole cover, and a remote transmission type tower top thermometer and a tower top pressure gauge on the top of the fractionating tower are all connected with a controller in the control cabinet through instrument signal lines.
The electromagnetic control cabinet can be purchased from the market, the electromagnetic control cabinet is externally connected with power frequency alternating current, the alternating current is rectified into direct current through a circuit taking an IGBT as a core, then the direct current is changed into adjustable current, special cables are supplied, according to the size of the used power, the electromagnetic control cabinet with small power can be provided with an air cooling radiating fin and a fan, when the power is high, the radiator of the electromagnetic control cabinet is externally connected with circulating cooling water, the electromagnetic control cabinet is provided with a thermal switch assembly, the IGBT operation temperature is induced, and the overheat damage device is prevented.
The fractionating tower comprises a bottom tower section, a plurality of middle tower sections, an acid separating tower section, a feeding tower section and a tower cover which are connected together from bottom to top;
the bottom tower section is made of high silicon cast iron, an annular tenon is arranged on the lower end face of the bottom tower section, an annular first supporting table is fixed on the lower portion of the inner wall of the bottom tower section, a round tower grate made of high silicon cast iron is arranged on the first supporting table, two layers of ladder ring fillers are arranged on the upper portion of the round tower grate, and then the inner part of the bottom tower section above the ladder ring fillers is filled with Raschig ring fillers in a random mode. A bottom tower section shell is arranged outside the bottom tower section, and the lower end of the bottom tower section shell is connected to a flange of a tower hole of the pot cover through bolts;
the lower part installs annular tower seat in the tower hole of pot cover, and annular tower festival backup ring is installed to tower seat upper portion, and the annular gap between tower seat and the tower hole and the annular gap between backup ring and the tower hole all are filled up acid-resistant daub. The tower base and the tower section support ring are made of high silicon cast iron, corrosion resistance of the contact fluid part is guaranteed, an annular mortice is formed in the upper end face of the tower section support ring, acid-resistant cement is also arranged in the mortice on the upper end face of the tower section support ring, and the annular mortice on the lower end face of the tower section at the bottom is inserted into the mortice on the top of the tower section support ring. A plurality of studs are fixed inside the tower section supporting ring.
The lower part of the inner wall of the middle tower section is fixed with an annular second supporting table, a round tower grate made of high-silicon cast iron is arranged on the second supporting table, a layer of stepped ring filler is arranged on the upper part of the round tower grate, and then the inner part of the middle tower section above the stepped ring filler is filled up in a random manner by using Raschig ring filler. The outer side of the middle tower section is provided with a middle tower section shell, a gap between the middle tower section and the middle tower section shell is filled with acid-resistant cement and then solidified to form a firm whole, the middle tower section is positioned at the top of the bottom tower section, an annular gasket is arranged between the middle tower section and the bottom tower section, the lower end and the upper end of the middle tower section shell are both provided with flanges, and the flange at the lower end of the middle tower section shell is connected with the flange at the upper end of the bottom tower section shell through bolts; gaskets are arranged between two adjacent middle tower sections, and the shells of the two adjacent middle tower sections are connected through flanges and bolts.
The inner wall of the middle tower section shell is welded with the bulge, and when the acid-resistant cement is solidified, the bulge is solidified in the cement, so that the cement can be better fixed on the middle tower section shell, the overall stress performance of the middle tower section shell and the acid-resistant cement is improved, and the upper and lower dislocation separation is prevented.
An acid separating tower section is arranged above the uppermost middle tower section, an annular third supporting table is fixed at the lower part of the inner wall of the acid separating tower section, a round tower grate made of high-silicon cast iron is arranged on the supporting table, a layer of stepped ring filler is arranged at the upper part of the tower grate, and then the inside of the acid separating tower section above the stepped ring filler is randomly piled to the upper part of the tower section by using Raschig ring filler; an annular upper supporting table is fixed on the upper portion of the inner wall of the acid separation tower section, a cross acid separation device support is arranged on the upper supporting table, the top of the acid separation device support is provided with an acid separation tower section shell, a gap between the acid separation tower section and the acid separation tower section shell is filled with acid-resistant cement and then solidified to form a firm whole, an annular gasket is arranged between the acid separation tower section and the middle tower section below the acid separation tower section, flanges are arranged at the lower end and the upper end of the acid separation tower section shell, and the flanges at the lower end of the acid separation tower section shell are connected with the flanges at the upper end of the middle tower section shell below the acid separation tower section shell through bolts.
The upper part of the acid separation tower section is provided with a feeding hole, a lower acid pipe extends into the feeding tower section from the feeding hole, a gasket is arranged between a flange of the lower acid pipe and a flange at the outer end of the feeding hole, the flange of the lower acid pipe is connected with a flange of the feeding hole through bolts, a discharge hole of the lower acid pipe is positioned above a groove at the top of the acid separation device, the lower end of the outer wall of the feeding tower section is sleeved with a loose flange, a gasket is arranged between the feeding tower section and the acid separation tower section, and the flange at the lower end of the outer wall of the feeding tower section is connected with a flange at the upper end of the outer shell of the acid separation tower section through bolts; a circular tower grate made of high-silicon cast iron is arranged on the supporting table, a layer of stepped ring filler is arranged on the upper part of the tower grate, and then the inner part of the feeding tower section above the stepped ring filler is filled up in a random manner by using Raschig ring filler;
there is the tower lid top feeding tower festival, is equipped with the gasket between feeding tower festival and the tower lid, and the loose flange of feeding tower festival outer wall upper end passes through bolted connection with the loose flange of tower lid outer wall lower extreme, and the tower lid middle part upwards has the gas outlet, and steam conduit is connected to the gas outlet.
The acid distributor comprises an acid distributor body, wherein the acid distributor body comprises an outer wall and a middle partition plate which are cast together, the diameter of the upper end of the acid distributor body is smaller than that of the lower end, the middle partition plate divides the inside of the acid distributor body into an upper groove and a lower groove, a plurality of weir teeth are arranged on the periphery of the groove above the middle partition plate, acid flows into the groove and uniformly flows down from the side wall along gaps of the weir teeth, and a plurality of air holes are formed in the groove wall below the middle partition plate.
The invention has the advantages that: the ultrasonic frequency and high frequency electromagnetic heating acid-resistant cast iron concentrating pot has the advantages of being capable of controlling the temperature in the electromagnetic control cabinet and the heating furnace, controlling the temperature and pressure at the top of the concentrating pot cover, controlling the temperature and pressure at the top of the fractionating tower in a linkage manner, being rapid and controllable in heating, simple in high temperature resistant measures, easy in corrosion resistant measures, soft and easy in processing and shaping coil materials, improving electromagnetic efficiency by ferrite, small in environmental pollution, high in reliability, energy-saving, safe and the like.
The fractionating tower is corrosion-resistant, long in service life and not easy to damage; the split tower section is easy to manufacture, high in yield, convenient to install and overhaul, easy to fasten and seal, and difficult to leak; the structure of the packed tower is not easy to be blocked by fine impurities; the tower shell structure with the clay increases the protective performance and the heat preservation performance of the tower, and is convenient for the connection and the sealing of the tower.
Description of the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the structure of a fractionation column according to the present invention;
FIG. 3 is a schematic diagram of the front view of the acid distributor in the fractionation column of the present invention;
FIG. 4 is a schematic top view of the acid distributor in the fractionation column of the present invention.
The specific embodiment is as follows:
the invention is further described below with reference to fig. 1-4;
the concentrating pot comprises a pot body 1 and a pot cover 2, wherein two rings of flanges are fixed on the upper part of the pot body, the flange positioned above is connected with the flange on the pot cover through bolts, and a sealing gasket is clamped between the pot body and the pot cover; the side of the upper part of the pot body is provided with a concentrated sulfuric acid outlet 3, the outer wall of the pot body is fixed with a corrosion-resistant heat-insulating layer 4, and the corrosion-resistant heat-insulating layer is made of rock wool, glass wool and the like. The coil panel is arranged outside the heat-insulating layer, the coil panel is composed of three layers, the innermost layer is a protective layer 5, the protective layer is made of fluoroplastic or bakelite and other materials with the functions of corrosion resistance, insulation and special cable support, the middle layer is an electromagnetic coil 6 (the electromagnetic coil is wound on the outer wall of the protective layer) made of special cable (wheat stay wire) discs, the special cable is a superfine copper wire with insulating paint on multiple cores, and the surface layer of the special cable is wrapped with the insulating protective layer; the outermost layer is a ferrite magnetic sheet 7 which is stuck with a certain distance at intervals and is perpendicular to the electromagnetic coil; the protective layer is attached to the heat-insulating layer on the outer wall of the pot body. The coil panel is hung on a flange positioned below the top of the pot body.
The outer wall of the coil panel is provided with a temperature sensor (the temperature sensor is arranged on the cable to measure the temperature and prevent the cable from overtemperature).
The pot cover is provided with a manhole 17 and a fractionating tower hole 18, the manhole cover is provided with a remote transmission type thermometer 8 and a pressure gauge 9, the fractionating tower 10 is arranged on the fractionating tower hole, the fractionating tower is a packed tower, and the top of the tower is provided with a compensator 11, a remote transmission type tower top thermometer and a tower top pressure gauge.
The pot body is arranged in the heating furnace 14, the upper part in the heating furnace is provided with a supporting lug 15, and a flange positioned below the upper part of the pot body is arranged on the supporting lug.
The top of the heating furnace is provided with a movable heating furnace cover plate 16, a manhole and a fractionating tower on the pot cover are exposed from the heating furnace cover plate, the side wall of the heating furnace is provided with a heating furnace door 19 for overhauling, the lower part of the heating furnace is provided with an air inlet channel, the side wall of the heating furnace is provided with a corrosion-resistant axial flow fan 20, the bottom of the heating furnace is provided with a funnel-shaped liquid collecting pit 21, and the bottom of the liquid collecting pit is connected with a pipeline 22 for going to an emergency pool in a factory area. The liquid collecting pit is built by corrosion-resistant acid-proof concrete and acid-proof bricks, the heating furnace is provided with a closed shell made of non-magnetic materials, and the heat preservation and the organized collection of gas are carried out.
The two ends of the special cable of the coil panel extend out of the side wall of the heating furnace and then are connected with an output terminal in the electromagnetic control cabinet 12, a power frequency line is connected with an input terminal in the electromagnetic control cabinet, and a temperature sensor, a remote-transmission thermometer and a pressure gauge on a manhole cover, and a remote-transmission tower top thermometer and a tower top pressure gauge on the top of the fractionating tower are all connected with a controller in the control cabinet through instrument signal lines.
The electromagnetic control cabinet can be purchased from the market, the electromagnetic control cabinet is externally connected with power frequency alternating current, the alternating current is rectified into direct current through a circuit taking an IGBT as a core, then the direct current is changed into adjustable current, special cables are supplied, according to the size of the used power, the electromagnetic control cabinet with small power can be provided with an air cooling radiating fin and a fan, when the power is high, the radiator of the electromagnetic control cabinet is externally connected with circulating cooling water, the electromagnetic control cabinet is provided with a thermal switch assembly, the IGBT operation temperature is induced, and the overheat damage device is prevented.
The fractionating tower comprises a bottom tower section 10-1, a plurality of middle tower sections 10-2, an acid separating tower section 10-3, a feeding tower section 10-4 and a tower cover 10-5 which are connected together from bottom to top;
the bottom tower section is made of high-silicon cast iron, an annular tenon is arranged on the lower end face of the bottom tower section, an annular first supporting table 10-6 is fixed on the lower portion of the inner wall of the bottom tower section, a round tower grate 10-7 made of high-silicon cast iron is arranged on the first supporting table, two layers of stepped ring fillers 10-8 are arranged on the upper portion of the round tower grate, and then the inner part of the bottom tower section above the stepped ring fillers is filled up in a random manner by using Raschig ring fillers 10-9. The outer side of the bottom tower section is provided with a bottom tower section shell 10-10, and the lower end of the bottom tower section shell is connected to a tower hole flange of the pot cover through bolts;
the lower part in the tower hole of the pot cover is provided with an annular tower seat 10-12, the upper part of the tower seat is provided with an annular tower section supporting ring 10-13, and an annular gap between the tower seat and the tower hole and an annular gap between the supporting ring and the tower hole are filled with acid-resistant cement 10-14. The tower base and the tower section support ring are made of high silicon cast iron, corrosion resistance of the contact fluid part is guaranteed, an annular mortice is formed in the upper end face of the tower section support ring, acid-resistant cement is also arranged in the mortice on the upper end face of the tower section support ring, and the annular mortice on the lower end face of the tower section at the bottom is inserted into the mortice on the top of the tower section support ring. A plurality of studs 10-15 are fixed inside the tower section support ring.
The lower part of the inner wall of the middle tower section is fixedly provided with a second annular supporting table 10-16, a round tower grate 10-7 made of high silicon cast iron is arranged on the second supporting table, a layer of stepped ring filler 10-8 is arranged on the upper part of the round tower grate, and then the inner part of the middle tower section above the stepped ring filler is filled up in a random manner by using Raschig ring filler 10-9. The outer side of the middle tower section is provided with a middle tower section shell 10-17, a gap between the middle tower section and the middle tower section shell is filled with acid-resistant cement 10-14 and then solidified to form a firm whole, the middle tower section is positioned at the top of the bottom tower section, an annular gasket 10-18 is arranged between the middle tower section and the bottom tower section, the lower end and the upper end of the middle tower section shell are both provided with flanges, and the flange at the lower end of the middle tower section shell is connected with the flange at the upper end of the bottom tower section shell through bolts; gaskets are arranged between two adjacent middle tower sections, and the shells of the two adjacent middle tower sections are connected through flanges and bolts.
The inner wall of the middle tower section shell is welded with the bulges 10-19, and when the acid-resistant cement is solidified, the bulges are solidified in the cement, so that the cement can be better fixed on the middle tower section shell, the overall stress performance of the middle tower section shell and the acid-resistant cement is improved, and the upper and lower dislocation separation is prevented.
An acid separating tower section 10-3 is arranged above the uppermost middle tower section, an annular third supporting table 10-20 is fixed at the lower part of the inner wall of the acid separating tower section, a round tower grate 10-7 made of high-silicon cast iron is arranged on the supporting table, a layer of stepped ring filler 10-8 is arranged at the upper part of the tower grate, and then the inner part of the acid separating tower section above the stepped ring filler is randomly piled to the upper part of the tower section by using a Raschig ring filler 10-9; an annular upper supporting table 10-21 is fixed on the upper part of the inner wall of the acid separation tower section, a cross acid separation device bracket 10-22 is arranged on the upper supporting table, an acid separation device 10-23 is arranged at the top of the acid separation device bracket, an acid separation tower section shell 10-24 is arranged outside the acid separation tower section, a gap between the acid separation tower section and the acid separation tower section shell is filled with acid-resistant cement 10-14 and then solidified to form a firm whole, an annular gasket is arranged between the acid separation tower section and the middle tower section below the acid separation tower section, flanges are arranged at the lower end and the upper end of the acid separation tower section shell, and the flange at the lower end of the acid separation tower section shell is connected with the flange at the upper end of the middle tower section shell below the acid separation tower section shell through bolts.
The upper part of the acid separation tower section is provided with a feeding hole, a lower acid pipe 10-25 extends into the feeding tower section from the feeding hole, a gasket is arranged between the flange of the lower acid pipe and the flange at the outer end of the feeding hole, the flange of the lower acid pipe is connected with the flange of the feeding hole through bolts, the discharge hole of the lower acid pipe is positioned above the groove at the top of the acid separation device, the lower end of the outer wall of the feeding tower section is sleeved with a loose flange, a gasket is arranged between the feeding tower section and the acid separation tower section, and the flange at the lower end of the outer wall of the feeding tower section is connected with the flange at the upper end of the outer shell of the acid separation tower section through bolts; an annular fourth supporting table 10-26 is fixed on the inner wall of the feeding tower section above the acid discharging pipe, a round tower grate 10-7 made of high silicon cast iron is arranged on the supporting table, a layer of stepped ring packing 10-8 is arranged on the upper part of the tower grate, and then the inner part of the feeding tower section above the stepped ring packing is filled up in a random manner by using Raschig ring packing 10-9;
a tower cover is arranged above the feeding tower section, a gasket is arranged between the feeding tower section and the tower cover, a loose flange at the upper end of the outer wall of the feeding tower section is connected with a loose flange at the lower end of the outer wall of the tower cover through bolts, an air outlet 10-11 is arranged in the middle of the tower cover upwards, and the air outlet is connected with a steam pipeline 13.
Referring to fig. 3 and 4, the acid distributor 10-23 comprises an acid distributor body, the acid distributor body comprises an outer wall 10-23-1 and an intermediate baffle 10-23-2 which are cast together, the diameter of the upper end of the acid distributor body is smaller than that of the lower end, the intermediate baffle divides the inside of the acid distributor body into an upper groove and a lower groove, a plurality of weir teeth 10-23-3 are arranged around the groove above the intermediate baffle, and after flowing into the groove, acid uniformly flows down from the side wall along the gaps of the weir teeth, and a plurality of air holes 10-23-4 are formed in the groove wall below the intermediate baffle.
The working process comprises the following steps: after the fractionating tower is installed, dilute acid flows into the feeding tower section from the acid discharging pipe, falls into the groove at the upper part of the acid distributor downwards, overflows from the sawtooth weir at the upper part of the acid distributor and is distributed on Raschig ring packing in the acid distributor section, and slowly throttles to the bottom tower at the lower part. The heated sulfuric acid steam in the pot upwards enters the tower through the tower hole, the hot sulfuric acid upwards and the dilute sulfuric acid flowing downwards from top to bottom transfer mass and heat, the water vapor is distilled out from the air outlet on the tower cover at the top of the tower, the dehydrated dilute sulfuric acid and the condensed sulfuric acid steam flow out from the lower part of the tower and enter the sulfuric acid concentration pot of the heating equipment, so that the needed concentrated sulfuric acid is obtained, and the fractionation of sulfuric acid and water in the dilute sulfuric acid is realized.
The device heats the continuous automatic pot-type sulfuric acid concentration device through superaudio or high frequency, distills, dewaters and concentrates dilute waste sulfuric acid, removes a small amount of impurities, and the obtained concentrated sulfuric acid can be recycled.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (4)
1. The device for heating the pot-type sulfuric acid concentration device by using ultrasonic frequency and high-frequency electromagnetic induction comprises a concentration pot, wherein the concentration pot comprises a pot body (1) and a pot cover (2), two rings of flanges are fixed on the upper part of the pot body, the flange positioned above is connected with the flange on the pot cover through bolts, and a sealing gasket is clamped between the pot body and the pot cover; the side of the upper part of the pot body is provided with a concentrated sulfuric acid outlet (3), which is characterized in that: the outer wall of the pot body is fixed with a corrosion-resistant heat-insulating layer (4), a coil panel is arranged outside the heat-insulating layer, the coil panel is composed of three layers, the innermost layer is a protective layer (5), and the middle layer is an electromagnetic coil (6) made of a special cable coil; the outermost layer is a ferrite magnetic sheet (7) which is stuck with a certain distance at intervals and is perpendicular to the electromagnetic coil; the protective layer is attached to the heat insulation layer on the outer wall of the pot body, and the coil panel is hung on a flange positioned below the top of the pot body;
a manhole (17) and a fractionating tower hole (18) are formed in the pot cover, and the fractionating tower (10) is arranged on the fractionating tower hole;
the pot body is arranged in a heating furnace (14), a supporting lug (15) is arranged at the upper part in the heating furnace, and a flange positioned below the upper part of the pot body is arranged on the supporting lug;
a heating furnace cover plate (16) is arranged at the top of the heating furnace, a manhole and a fractionating tower on the pot cover are exposed from the heating furnace cover plate, and a heating furnace door (19) is arranged on the side wall of the heating furnace;
the fractionating tower comprises a bottom tower section (10-1), a plurality of middle tower sections (10-2), an acid separating tower section (10-3), a feeding tower section (10-4) and a tower cover (10-5) which are connected together from bottom to top;
the bottom tower section (10-1) is made of high-silicon cast iron, the lower end face of the bottom tower section is provided with an annular tenon, the lower part of the inner wall of the bottom tower section is fixedly provided with an annular first supporting table (10-6), a round tower grate (10-7) made of high-silicon cast iron is arranged on the first supporting table, two layers of stepped ring fillers (10-8) are arranged on the upper part of the round tower grate, and then the inner part of the bottom tower section above the stepped ring fillers is filled up in a random manner by using Raschig ring fillers (10-9); a bottom tower section shell (10-10) is arranged outside the bottom tower section, and the lower end of the bottom tower section shell is connected to a flange of a tower hole of the pot cover through bolts;
an annular tower seat (10-12) is arranged at the lower part in a fractionating tower hole (18) of the pot cover, an annular tower section supporting ring (10-13) is arranged at the upper part of the tower seat, and acid-resistant cement (10-14) is filled in an annular gap between the tower seat and the tower hole and an annular gap between the supporting ring and the tower hole; the tower base and the tower section support ring are made of high silicon cast iron, an annular mortice is formed in the upper end face of the tower section support ring, acid-resistant cement is also formed in the mortice on the upper end face of the tower section support ring, an annular mortice on the lower end face of the bottom tower section is inserted into the mortice on the top of the tower section support ring, and a plurality of studs (10-15) are fixed in the tower section support ring;
an annular second supporting table (10-16) is fixed at the lower part of the inner wall of the middle tower section (10-2), a circular tower grate (10-7) made of high-silicon cast iron is arranged on the second supporting table, a layer of stepped ring filler (10-8) is arranged at the upper part of the circular tower grate, and then the inner part of the middle tower section above the stepped ring filler is filled up in a random manner by using a Raschig ring filler (10-9); a middle tower section shell (10-17) is arranged outside the middle tower section, a gap between the middle tower section and the middle tower section shell is filled with acid-resistant cement (10-14) and then solidified to form a firm whole, the middle tower section is positioned at the top of the bottom tower section, an annular gasket (10-18) is arranged between the middle tower section and the bottom tower section, flanges are arranged at the lower end and the upper end of the middle tower section shell, and the flange at the lower end of the middle tower section shell is connected with the flange at the upper end of the bottom tower section shell through bolts; gaskets are arranged between two adjacent middle tower sections, and the shells of the two adjacent middle tower sections are connected through flanges and bolts;
an acid separating tower section (10-3) is arranged above the uppermost middle tower section, an annular third supporting table (10-20) is fixed at the lower part of the inner wall of the acid separating tower section, a round tower grate (10-7) made of high-silicon cast iron material is arranged on the supporting table, a layer of stepped ring filler (10-8) is arranged at the upper part of the tower grate, and then the acid separating tower section above the stepped ring filler is randomly piled to the upper part of the tower section by using Raschig ring filler (10-9); an annular upper supporting table (10-21) is fixed on the upper part of the inner wall of the acid separation tower section, an acid separation device bracket (10-22) is arranged on the upper supporting table, an acid separation device (10-23) is arranged at the top of the acid separation device bracket, an acid separation tower section shell (10-24) is arranged outside the acid separation tower section, a gap between the acid separation tower section and the acid separation tower section shell is filled with acid-resistant cement (10-14) and then solidified to form a firm whole, an annular gasket is arranged between the acid separation tower section and the middle tower section below the acid separation tower section, flanges are arranged at the lower end and the upper end of the acid separation tower section shell, and the flange at the lower end of the acid separation tower section shell is connected with the flange at the upper end of the middle tower section shell below the acid separation tower section shell through bolts;
the upper part of the acid separation tower section is provided with a feeding tower section (10-4), the lower part of the feeding tower section is provided with a feeding port, a lower acid pipe (10-25) extends into the feeding tower section from the feeding port, a gasket is arranged between the flange of the lower acid pipe and the flange at the outer end of the feeding port, the flange of the lower acid pipe is connected with the flange of the feeding port through bolts, the discharging port of the lower acid pipe is positioned above a groove at the top of the acid separation device, the lower end of the outer wall of the feeding tower section is sleeved with a loose flange, a gasket is arranged between the feeding tower section and the acid separation tower section, and the flange at the lower end of the outer wall of the feeding tower section is connected with the flange at the upper end of the outer shell of the acid separation tower section through bolts; an annular fourth supporting table (10-26) is fixed on the inner wall of a feeding tower section above the acid discharging pipe, a round tower grate (10-7) made of high-silicon cast iron is arranged on the supporting table, a layer of stepped ring filler (10-8) is arranged on the upper part of the tower grate, and then the inner part of the feeding tower section above the stepped ring filler is filled up in a random manner by using Raschig ring filler (10-9);
a tower cover (10-5) is arranged above the feeding tower section, a gasket is arranged between the feeding tower section and the tower cover, a loose flange at the upper end of the outer wall of the feeding tower section is connected with a loose flange at the lower end of the outer wall of the tower cover through bolts, and an air outlet (10-11) is arranged in the middle of the tower cover;
the inner wall of the middle tower section shell is welded with a bulge (10-19);
the corrosion-resistant heat-insulating layer is made of rock wool, glass wool and the like; the protective layer is made of fluoroplastic or bakelite; the outer wall of the coil panel is provided with a temperature sensor; a manhole cover of the pot cover is provided with a remote transmission type thermometer (8) and a pressure gauge (9), a compensator (11), the remote transmission type tower top thermometer and the tower top pressure gauge are arranged at the top of the fractionating tower, and a gas outlet in the middle of the tower cover is connected with a steam pipeline (13).
2. The apparatus for heating a pot sulfuric acid concentration apparatus using supersonic frequency and high frequency electromagnetic induction according to claim 1, wherein: an air inlet channel is arranged at the lower part of the heating furnace, a corrosion-resistant axial flow fan (20) is arranged on the side wall of the heating furnace, the bottom of the heating furnace is a funnel-shaped liquid collecting pit (21), and the bottom of the liquid collecting pit is connected with a pipeline (22) for removing an emergency pool; the outer surface of the heating furnace is provided with a closed shell made of non-magnetic materials.
3. The apparatus for heating a pot sulfuric acid concentration apparatus using supersonic frequency and high frequency electromagnetic induction according to claim 1, wherein: the acid distributor (10-23) comprises an acid distributor body, the acid distributor body comprises an outer wall (10-23-1) and an intermediate baffle (10-23-2) which are cast together, the diameter of the upper end of the acid distributor body is smaller than that of the lower end, the intermediate baffle divides the inside of the acid distributor body into an upper groove and a lower groove, a plurality of weir teeth (10-23-3) are arranged around the groove above the intermediate baffle, and a plurality of air holes (10-23-4) are formed in the groove wall below the intermediate baffle after acid flows into the groove and uniformly flows down from the side wall along the gaps of the weir teeth.
4. The apparatus for heating a pot sulfuric acid concentration apparatus using supersonic frequency and high frequency electromagnetic induction according to claim 1, wherein: the two ends of the special cable of the coil panel extend out of the side wall of the heating furnace and then are connected with an output terminal wire post in an electromagnetic control cabinet (12), a power frequency wire is connected with an input terminal wire post in the electromagnetic control cabinet, and a temperature sensor, a remote-transmission thermometer and a pressure gauge on a manhole cover, and a remote-transmission tower top thermometer and a tower top pressure gauge on the top of the fractionating tower are all connected with a controller in the control cabinet through instrument signal wires.
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| CN202210914117.5A CN115212596B (en) | 2022-08-01 | 2022-08-01 | Device for heating pot-type sulfuric acid concentration device by using supersonic frequency and high-frequency electromagnetic induction |
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