CN110745786A

CN110745786A - Device for preparing sulfuric acid from pyrite

Info

Publication number: CN110745786A
Application number: CN201911069721.7A
Authority: CN
Inventors: 孙玉林; 丁建中; 丁建亚; 吴玉庆
Original assignee: Changzhou Yongxiang Chemical Co Ltd
Current assignee: Changzhou Yongxiang Chemical Co Ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-02-04
Anticipated expiration: 2039-11-05
Also published as: CN110745786B

Abstract

The invention discloses a device for preparing sulfuric acid from pyrite, which relates to the technical field of industrial preparation of sulfuric acid and aims to solve the problem of low purity of sulfuric acid prepared by the conventional industrial sulfuric acid preparation device; isolation mechanism includes the filter bag, and the filter bag upper end seals the setting, the lower extreme opening sets up, and jar internal below is equipped with the orifice plate, the top is equipped with the frame plate, has seted up the dust fall hole on the orifice plate, filter bag upper end fixed connection on the frame plate, lower extreme perisporium and dust fall hole perisporium fixed connection, and the air inlet is located the lateral wall of orifice plate below, and the gas outlet is located the jar side wall between orifice plate and the frame plate on. The invention ensures the purity of the prepared sulfuric acid by carrying out impurity removal treatment on the gas before the gas enters the absorption tower.

Description

Device for preparing sulfuric acid from pyrite

Technical Field

The invention relates to the technical field of industrial preparation of sulfuric acid, in particular to a device for preparing sulfuric acid from pyrite.

Background

Sulfuric acid is widely used in various industrial sectors, mainly in the fertilizer industry, the metallurgical industry, the petroleum industry, the mechanical industry, the pharmaceutical industry, the production of detergents, the military industry, the atomic energy industry, the aerospace industry, and the like. And also for the production of dyes, pesticides, chemical fibres, plastics, coatings, and a wide variety of basic organic and inorganic chemical products. The raw materials for producing the sulfuric acid comprise sulfur, pyrite, non-ferrous metal smelting flue gas, gypsum, hydrogen sulfide, sulfur dioxide, waste sulfuric acid and the like. Sulphur, pyrite and smelting fumes are three main raw materials.

The invention with the publication number of CN205676152U discloses a novel industrial sulfuric acid preparation device, which structurally comprises a fluidized bed furnace, a contact chamber, an absorption tower, a conveying pipeline, a heat exchanger and a catalyst emitter; the fluidized bed furnace is connected with a conveying pipeline, the conveying pipeline is connected with a contact chamber, a heat exchanger is arranged in the contact chamber, a catalyst emitter is arranged in the contact chamber, and the conveying pipeline is connected with an absorption tower.

The invention heats and ignites the pyrite by the fluidized bed furnace, and reacts and absorbs sulfur dioxide gas generated by combustion in the fluidized bed furnace by the subsequent contact chamber and the absorption tower to finally prepare the sulfuric acid.

However, during the combustion of the raw materials in the fluidized bed furnace, a large amount of smoke dust and fine particle fuel are generated, and the solid impurities are easily carried out by furnace gas, so that the purity of the finally prepared sulfuric acid is low.

Disclosure of Invention

The invention aims to provide a device for preparing sulfuric acid from pyrite, which ensures the purity of prepared sulfuric acid by carrying out impurity removal treatment on gas before the gas enters an absorption tower.

The above object of the present invention is achieved by the following technical solutions:

a device for preparing sulfuric acid from pyrite comprises a fluidized bed furnace, a contact chamber and an absorption tower which are sequentially communicated through a pipeline, wherein an impurity removing device is arranged between the contact chamber and the absorption tower and comprises a tank body, an isolation mechanism and a cleaning mechanism, the isolation mechanism and the cleaning mechanism are arranged in the tank body, the tank body is provided with an air inlet and an air outlet, and the bottom of the tank body is provided with an impurity outlet; the isolation mechanism comprises a filter bag, the upper end of the filter bag is sealed and arranged, the lower end of the filter bag is opened, a pore plate is arranged below the tank body, a frame plate is arranged above the tank body, a dust falling hole is formed in the pore plate, the upper end of the filter bag is fixedly connected to the peripheral wall of the upper end and the lower end of the frame plate and fixedly connected to the peripheral wall of the dust falling hole, the air inlet is located on the side wall below the pore plate, and the air outlet is located on the side wall of the tank body.

By adopting the technical scheme, sulfur dioxide gas generated by combustion of sulfur-containing bed materials in the fluidized bed furnace flows out of the fluidized bed furnace and then enters the contact chamber, catalytic oxidation reaction is carried out in the contact chamber to generate sulfur trioxide, the sulfur trioxide gas firstly enters the impurity removal device after flowing out of the contact chamber, the sulfur trioxide gas at the moment contains furnace dust impurities in the fluidized bed furnace and catalyst powder in the contact chamber, therefore, after the gas containing dust impurities enters the tank body, the hot gas continuously generated along with the flowing of the hot gas to the upper part of the tank body flows, because the tank body is internally provided with the pore plate for shielding, the gas can only enter the filter bag through the dust fall hole and flows out of the filter bag and is discharged out of the tank body through the air outlet, the solid dust impurities flowing along with the sulfur trioxide gas to the upper part of the tank body can be adhered to the inner side of the filter bag, and the sulfur, the sulfur trioxide gas discharged from the tank body is dissolved in concentrated sulfuric acid in the absorption tower to generate fuming sulfuric acid, and the fuming sulfuric acid is diluted to obtain pure sulfuric acid with various concentrations. The clearing mechanism is used for clearing solid dust in the filter bag, and the service life and the use effect of the isolation mechanism are prolonged. According to the invention, the impurity removal device is arranged between the contact chamber and the absorption tower, so that impurities in sulfur trioxide gas entering the absorption tower are reduced, the purity of gas for preparing sulfuric acid is ensured, and the quality of prepared sulfuric acid is further ensured.

The invention is further configured to: the cleaning mechanism comprises a motor horizontally and fixedly connected to the tank body, an output shaft of the motor is connected with an eccentric wheel, and the distance between the output shaft of the motor and the upper end surface of the frame plate is larger than the minimum diameter of the eccentric wheel and smaller than the maximum diameter of the eccentric wheel.

Through adopting above-mentioned technical scheme, after this edulcoration device work a period, more solid-state impurity has accumulated in the filter bag, and the solid-state impurity that attaches to on the filter bag can influence the gas permeability of filter bag, opens the motor this moment, makes the motor drive the eccentric wheel and rotates to intermittent type nature hits the frame plate, makes the frame plate produce vibrations, and the vibrations of frame plate drive the filter bag shake, thereby shake off the interior adnexed solid-state impurity of filter bag, make its impurity removal mouth from jar body bottom flow, thereby make the filter bag resume air permeability.

The invention is further configured to: the support plate is provided with a support table below, the excircle of the support table is fixedly connected to the side wall of the tank body, and the support table is supported by a plurality of elastic pieces between the support plates.

Through adopting above-mentioned technical scheme, the frame plate produces the vibrations of bigger frequency after receiving the hitting of eccentric wheel to shake filter bag by a larger margin makes its inside adnexed solid-state dust granule drop more thoroughly.

The invention is further configured to: still be equipped with cooling device in the edulcoration device, cooling device is including locating the orifice plate with the cooling tube between the frame plate, the cooling tube spiral coils locates the filter bag outside, let in air conditioning or cooling water in the cooling tube.

Through adopting above-mentioned technical scheme, there is a large amount of heat from the reaction of sulfur dioxide gas in the contact chamber to put, consequently, the gaseous temperature of sulfur trioxide from the contact chamber is very high, must pass through the cooling, then just can send into the absorption tower and absorb, the effect of refrigerated is compromise just to the edulcoration device, sulfur trioxide gas is at the in-process from the air inlet of the jar body to the gas outlet, need pass through spiral coil's cooling tube, exchange the heat between the air conditioning or the cooling water in gas and the cooling tube, thereby reach the purpose of cooling.

The invention is further configured to: the fluidized bed furnace comprises a furnace body, and a roasting space, an air distribution plate and an air distribution system which are sequentially arranged in the furnace body from top to bottom, wherein an explosion-proof hole is formed in the top of the furnace body, a feeding port, an ignition port and a slag discharge port are formed in the side wall of the furnace body above the air distribution plate, and bed materials are arranged on the air distribution plate.

By adopting the technical scheme, before ignition, firstly, the sulfur-containing bed material is fed from a feeding port, the bed material is distributed on the air distribution plate, and the air distribution plate is used for bearing the bed material and enabling the air rising speed to be uniformly distributed along the cross section in the furnace; then, the bed material is ignited from the ignition port, the air distribution system starts to introduce oxygen-containing gas into the tank body, the bed material forms a fluidized bed layer similar to a boiling state under the action of air flow, roasting is carried out under the state, the explosion-proof port prevents the fluidized bed furnace from exploding under the high-temperature and high-pressure state, the use safety is improved, gases such as sulfur dioxide and the like generated by combustion flow out from a road body and enter a contact chamber along a pipeline to carry out the next reaction, and the burnt slag is discharged from a slag discharge port.

The invention is further configured to: the bed material comprises a first boiling layer and a second boiling layer which are sequentially arranged from bottom to top, the first boiling layer is a mixture of sulfur powder and pyrite, and the second boiling layer is sulfur powder.

Through adopting above-mentioned technical scheme, pure sulphur powder burning is faster, and the sulphur powder burning that contains the pyrite is slower, consequently, sets up the second boiling layer into pure sulphur powder for the bed material ignites under the initial stage of a fire, flame are less more easily, and the bed material of first boiling layer can burn when the flame of first boiling layer is bigger. The arrangement makes the ignition of the bed material easier, simultaneously ensures the sufficient combustion of the furnace burden containing the pyrite, uses the sulfur powder and the pyrite as the bed material, has no exhaust gas in the roasting process, and finally converts the sulfur used for combustion into sulfur dioxide for preparing sulfuric acid.

The invention is further configured to: the air distribution system comprises a distribution cavity arranged in the furnace body below the air distribution plate, a ventilation pipe connected to the distribution cavity and a fan connected to the other end of the ventilation pipe, the ventilation pipe comprises a contraction pipe, a throat pipe and an expansion pipe which are sequentially connected, and a flow regulating valve is arranged on the throat pipe.

By adopting the technical scheme, the oxygen-containing gas blown by the fan enters from one end of the shrinkage pipe and sequentially enters the distribution cavity through the shrinkage pipe, the throat pipe and the expansion pipe, when the oxygen-containing gas enters the throat pipe from the shrinkage pipe, the diameter of the throat pipe is smaller than that of the inlet of the shrinkage pipe, so that the flow velocity of the oxygen-containing gas is gradually accelerated when the oxygen-containing gas flows into the throat pipe from the shrinkage pipe, the air velocity reaches the maximum at the throat pipe, and when the oxygen-containing gas reaches the expansion pipe and the distribution cavity, the flow velocity is slowed down, so that the aim of changing the air velocity is fulfilled, the air velocity is further adjusted by the flow adjusting valve from the throat pipe, so that personnel can adjust and control the air velocity at any time according to the combustion process in the fluidized bed furnace in the combustion process.

The invention is further configured to: the contact chamber comprises a preheating tank and a reaction tank which are communicated with each other, a heater is arranged in the preheating tank, a breathable reaction plate is arranged in the reaction tank, and a catalyst is paved on the reaction plate.

Through adopting above-mentioned technical scheme, the reaction that the sulfur dioxide gas takes place in the contact chamber is catalytic oxidation reaction, the gas that produces is sulfur trioxide, the process of this reaction is gone on under the high temperature of 500 degrees, if gaseous preheating that can not be abundant and directly enter into in the retort, then can lead to the incomplete condition of reaction to take place, make the incomplete conversion of sulfur dioxide gas, produce impure sulfur trioxide gas, cause the waste of sulphur, consequently this problem of solution that the preheating tank that sets up can be better, when preheating to reaction temperature's gas through the reaction plate, the conversion of sulfur dioxide to sulfur trioxide is accomplished to the efficient under the catalytic action of the catalyst on the reaction plate, conversion efficiency is high, conversion effect is good.

In conclusion, the beneficial technical effects of the invention are as follows:

1. the impurity removal device is arranged between the contact chamber and the absorption tower, so that impurities in sulfur trioxide gas entering the absorption tower are reduced, the purity of the gas for preparing sulfuric acid is ensured, and the quality of the prepared sulfuric acid is further ensured;

2. through set up preheating tank and retort in the contact chamber, preheat the gas that enters into in the retort at first, make it heat up to the reaction suitable temperature and react again to improve the efficiency of reaction, guaranteed that the reaction in the contact chamber is more thorough.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic sectional view taken along the plane a-a in fig. 1.

Fig. 3 is a partially enlarged schematic view of the fluidized bed furnace of fig. 2.

Fig. 4 is an enlarged partial schematic view of the contact chamber of fig. 2.

FIG. 5 is a partially enlarged schematic view of the trash removal device of FIG. 2.

In the figure, 1, a fluidized bed furnace; 11. a furnace body; 12. a roasting space; 13. a wind distribution plate; 14. a distribution chamber; 15. a feeding port; 16. an ignition port; 17. a slag discharge port; 18. an explosion-proof hole; 2. a contacting chamber; 21. a preheating tank; 211. a heater; 22. a reaction tank; 221. a reaction plate; 3. an impurity removal device; 31. a tank body; 32. an isolation mechanism; 321. an orifice plate; 322. dust falling holes; 323. a filter bag; 324. a frame plate; 325. a support table; 326. an elastic member; 33. a clearing mechanism; 331. a motor; 332. an eccentric wheel; 34. a cooling device; 341. a cooling tube; 35. a sundry outlet; 4. an absorption tower; 5. a vent pipe; 51. a shrink tube; 52. a throat; 53. enlarging the tube; 6. a fan; 7. a flow regulating valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the device for preparing sulfuric acid from pyrite disclosed by the invention comprises a fluidized bed furnace 1, a contact chamber 2, an impurity removal device 3 and an absorption tower 4 which are sequentially communicated through pipelines.

Referring to fig. 3, the fluidized bed furnace 1 includes a furnace body 11, a roasting space 12, an air distribution plate 13 and an air distribution system which are sequentially arranged in the furnace body 11 from top to bottom, an explosion-proof hole 18 is arranged at the top of the furnace body 11, a bed material (not shown in the figure) is paved on the air distribution plate 13, the bed material includes a first fluidized bed and a second fluidized bed which are sequentially arranged from bottom to top, the first fluidized bed is a mixture of sulfur powder and pyrite, wherein the sulfur powder accounts for 7%; the second boiling layer is pure sulfur powder, and the thickness of the second boiling layer is 4 cm; the total weight of the sulfur powder in the whole bed material is not less than 15 percent of the total weight of the bed material. The air distribution plate 13 is directly provided with a plurality of blast caps with small ventilation holes, which are used for bearing bed materials and ensuring that the ascending speed of air is uniformly distributed along the cross section in the furnace, and when an air distribution system blows air to the lower part of the air distribution plate 13, oxygen-containing gas enters the upper part of the air distribution plate 13 through the air distribution plate 13 to ensure that the bed materials are boiled and combusted. The side wall of the furnace body 11 above the air distribution plate 13 is provided with a feeding port 15, an ignition port 16 and a slag discharge port 17. The air distribution system comprises a distribution cavity 14 arranged in the furnace body 11 below the air distribution plate 13, a ventilation pipe 5 connected to the distribution cavity 14 and a fan 6 connected to the other end of the ventilation pipe 5, wherein the ventilation pipe 5 comprises a contraction pipe 51, a throat pipe 52 and an expansion pipe 53 which are sequentially connected in sequence, and the throat pipe 52 is provided with a flow regulating valve 7.

The reaction process in the fluidized bed furnace 1 is as follows: before ignition, firstly, a sulfur-containing bed material is fed from a feeding port 15, the bed material is distributed on an air distribution plate 13, and the air distribution plate 13 is used for bearing the bed material and enabling the air ascending speed to be uniformly distributed along the cross section in the furnace; then, the bed material is ignited from the ignition port 16, simultaneously, the fan 6 is started, the oxygen-containing gas blown by the fan 6 enters from one end of the contraction pipe 51 and enters the distribution cavity 14 through the contraction pipe 51, the throat pipe 52 and the expansion pipe 53 in sequence, when the oxygen-containing gas enters the throat pipe 52 from the contraction pipe 51, the diameter of the throat pipe 52 is smaller than that of the inlet of the contraction pipe 51, so that the flow rate of the oxygen-containing gas is gradually increased when the oxygen-containing gas flows into the throat pipe 52 from the contraction pipe 51, the air flow rate reaches the maximum at the throat pipe 52, and the flow rate is reduced when the oxygen-containing gas reaches the expansion pipe 53 and the distribution cavity 14, so that the purpose of changing the air flow rate is; when the air above the bed material reaches a certain rising speed, the bed material on the air distribution plate 13 is switched into a boiling state from a static state, the wind speed at this time is called critical boiling wind speed, in order to keep a violent boiling combustion working condition, the wind speed during the normal operation of the fluidized bed furnace 1 is larger than the critical boiling wind speed, so that the material layer is expanded to a certain height, the boiling height of the bed material is about twice of the thickness of the bed material in the static state, the fuel in the volume is in a boiling state, and at this time, small particles in the bed material are brought out of the furnace by gas which is mainly sulfur dioxide and is generated by combustion. The wind speed in the boiling furnace 1 can be adjusted from the throat 52 through the flow adjusting valve 7, and the sectional area of the ventilation pipe 5 is small, so that the adjustment is convenient and the change is sensitive.

The gas generated by combustion contains a sufficient amount of air in addition to sulfur dioxide, and the gas enters the contact chamber 2 along the pipeline for subsequent reaction, and the burnt slag is discharged from the slag discharging port 17.

Referring to fig. 4, the contact chamber 2 is a large cylinder made of steel, and includes a preheating tank 21 and a reaction tank 22 which are communicated with each other, the preheating tank 21 is at the lower layer, the reaction tank 22 is at the upper layer, a heater 211 is arranged in the preheating tank 21, a multi-layer air-permeable reaction plate 221 is arranged in the reaction tank 22, and a vanadium catalyst (not shown) which is prefabricated into a hollow tubular object in a section is laid on the reaction plate 221. The inlet of the contact chamber 2 is disposed below the preheating tank 21, and the outlet is disposed above the reaction tank 22.

The reaction process of the gas in the contact chamber 2 is as follows: the reaction of the sulphur dioxide gas in the contact chamber 2 is a catalytic oxidation reaction, the generated gas is sulphur trioxide, which also entrains a small portion of air and unreacted sulphur dioxide. The process of this reaction is gone on under 500 degrees's high temperature, if gaseous preheating that can not be abundant and directly enter into retort 22 in, then can lead to the incomplete condition of reaction to take place, make sulfur dioxide gas conversion incomplete, produce impure sulfur trioxide gas, cause the waste of sulphur, consequently, this problem of solution that preheating tank 21 that sets up can be better, sulfur dioxide gas at first gets into preheating tank 21 and is preheated to about 500 ℃, when preheating to reaction temperature's gas through reaction plate 221, the conversion of sulfur dioxide to sulfur trioxide is accomplished to the efficient under the catalytic action of the catalyst on reaction plate 221, conversion efficiency is high, conversion effect is good.

The gas that the reaction was accomplished in the contactor 2 contains more air and sulfur dioxide besides sulfur trioxide to and some solid particle impurity, and these gases enter into impurity removal device 3 along the pipeline and carry out the edulcoration earlier, and the reaction of finally preparing sulphuric acid is carried out in reentrant absorption tower 4 at last.

Referring to fig. 5, the impurity removing device 3 includes a tank 31, an isolation mechanism 32 disposed in the tank 31, a cleaning mechanism 33, and a cooling device 34, wherein the tank 31 is provided with an air inlet and an air outlet, the bottom of the tank 31 is funnel-shaped, and a impurity outlet 35 is disposed at the lowest position.

Referring to fig. 5, the isolation mechanism 32 includes a filter bag 323, the filter bag 323 is provided with a seal at the upper end and an opening at the lower end, a hole plate 321 is provided at the lower part inside the tank 31, a frame plate 324 is provided at the upper part, a support table 325 is provided below the frame plate 324, the outer circle of the support table 325 is fixedly connected to the inner side wall of the tank 31, the support table 325 and the frame plate 324 are supported by a plurality of elastic members 326, the elastic members 326 in this embodiment of the invention are springs; the pore plate 321 is provided with dust falling holes 322, the upper end of the filter bag 323 is fixedly connected with the peripheral wall of the dust falling holes 322 at the upper end and the lower end of the frame plate 324, the air inlet is positioned on the side wall below the pore plate 321, and the air outlet is positioned on the side wall of the tank 31 between the pore plate 321 and the frame plate 324.

Referring to fig. 5, the removing mechanism 33 includes a motor 331 horizontally and fixedly coupled to the tank 31, an eccentric 332 coupled to an output shaft of the motor 331, and a distance between the output shaft of the motor 331 and an upper end surface of the frame plate 324 is greater than a minimum diameter of the eccentric 332 and less than a maximum diameter of the eccentric 332.

Referring to fig. 5, the cooling device 34 includes a cooling pipe 341 disposed between the perforated plate 321 and the frame plate 324, the cooling pipe 341 is spirally wound outside the filter bag 323, and cold air or cooling water is introduced into the cooling pipe 341.

The impurity removal process of the impurity removal device 3 is as follows: after sulfur trioxide gas flows out of the contact chamber 2 and enters the tank body 31, hot gas continuously generated from source flows to the upper part of the tank body 31, and the perforated plate 321 is arranged in the tank body 31 for shielding, so that the gas can only enter the filter bag 323 through the dust fall hole 322 and flows out of the filter bag 323, and is discharged out of the tank body 31 through the air outlet, solid dust impurities flowing to the upper part of the tank body 31 along with the sulfur trioxide gas can be adhered to the inner side of the filter bag 323, and therefore the sulfur trioxide gas flowing out of the air outlet of the tank body 31 contains less impurities. In the process from the gas inlet to the gas outlet of the tank 31, the sulfur trioxide gas needs to pass through the spirally wound cooling pipe 341, and heat is exchanged between the gas and cold air or cooling water in the cooling pipe 341, so that the purpose of cooling is achieved.

After the impurity removing device 3 works for a period of time, more solid impurities are accumulated in the filter bag 323, the solid impurities attached to the filter bag 323 can affect the air permeability of the filter bag 323, at the moment, the motor 331 is started to enable the motor 331 to drive the eccentric wheel 332 to rotate, so that the frame plate 324 is intermittently beaten, the frame plate 324 vibrates after being beaten by the eccentric wheel 332, the filter bag 323 is shaken, the solid impurities attached to the interior of the filter bag are made to fall off and flow out from the impurity outlet 35 at the bottom of the tank body 31, and the air permeability of the filter bag 323 is recovered.

The sulfur trioxide gas discharged from the tank body 31 is dissolved in concentrated sulfuric acid in the absorption tower 4 to generate fuming sulfuric acid, and the fuming sulfuric acid is diluted to obtain pure sulfuric acid with various concentrations.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a pyrite system sulphuric acid device, includes fluidized bed furnace (1), contact chamber (2) and absorption tower (4) that loop through the pipeline intercommunication, its characterized in that: an impurity removal device (3) is arranged between the contact chamber (2) and the absorption tower (4), the impurity removal device (3) comprises a tank body (31), an isolation mechanism (32) and a cleaning mechanism (33) which are arranged in the tank body (31), the tank body (31) is provided with an air inlet and an air outlet, and the bottom of the tank body (31) is provided with an impurity outlet (35); the isolation mechanism (32) comprises a filter bag (323), the upper end of the filter bag (323) is sealed and arranged, the lower end of the filter bag (323) is opened, a hole plate (321) is arranged below the tank body (31), a frame plate (324) is arranged above the hole plate (321), a dust falling hole (322) is formed in the hole plate (321), the upper end of the filter bag (323) is fixedly connected with the peripheral walls of the upper end and the lower end of the frame plate (324) and the peripheral wall of the dust falling hole (322), the air inlet is located on the side wall below the hole plate (321), and the air outlet is located on the side wall of the tank body (31) between the hole plate.

2. The apparatus for producing sulfuric acid from pyrite according to claim 1, wherein: the cleaning mechanism (33) comprises a motor (331) horizontally and fixedly connected to the tank (31), an eccentric wheel (332) is connected to an output shaft of the motor (331), and the distance between the output shaft of the motor (331) and the upper end face of the frame plate (324) is larger than the minimum diameter of the eccentric wheel (332) and smaller than the maximum diameter of the eccentric wheel (332).

3. The apparatus for producing sulfuric acid from pyrite according to claim 2, wherein: a supporting platform (325) is arranged below the frame plate (324), the outer circle of the supporting platform (325) is fixedly connected to the side wall of the tank body (31), and the supporting platform (325) is supported by a plurality of elastic pieces (326) between the frame plate (324).

4. The apparatus for producing sulfuric acid from pyrite according to claim 1, wherein: still be equipped with cooling device (34) in edulcoration device (3), cooling device (34) are including locating cooling tube (341) between orifice plate (321) and frame plate (324), cooling tube (341) spiral coil locate filter bag (323) outside, let in air conditioning or cooling water in cooling tube (341).

5. The apparatus for producing sulfuric acid from pyrite according to claim 1, wherein: the fluidized bed furnace (1) comprises a furnace body (11), a roasting space (12), an air distribution plate (13) and an air distribution system are sequentially arranged in the furnace body (11) from top to bottom, an explosion-proof hole (18) is formed in the top of the furnace body (11), a feeding port (15), an ignition port (16) and a slag discharge port (17) are formed in the side wall of the furnace body (11) above the air distribution plate (13), and bed materials are arranged on the air distribution plate (13).

6. The apparatus for producing sulfuric acid from pyrite according to claim 5, wherein: the bed material comprises a first boiling layer and a second boiling layer which are sequentially arranged from bottom to top, the first boiling layer is a mixture of sulfur powder and pyrite, and the second boiling layer is sulfur powder.

7. The apparatus for producing sulfuric acid from pyrite according to claim 5, wherein: the air distribution system comprises a distribution cavity (14) arranged in a furnace body (11) below the air distribution plate (13), a ventilation pipe (5) connected to the distribution cavity (14) and a fan (6) connected to the other end of the ventilation pipe (5), the ventilation pipe (5) comprises a contraction pipe (51), a throat pipe (52) and an expansion pipe (53) which are sequentially connected, and a flow regulating valve (7) is arranged on the throat pipe (52).

8. The apparatus for producing sulfuric acid from pyrite according to claim 1, wherein: the contact chamber (2) comprises a preheating tank (21) and a reaction tank (22) which are communicated with each other, a heater (211) is arranged in the preheating tank (21), a breathable reaction plate (221) is arranged in the reaction tank (22), and a catalyst is paved on the reaction plate (221).