Ignition device for pyrite acid-making fluidized bed furnace

Abstract

The utility model discloses a pyrite acid-making fluidized bed furnace ignition device which comprises an air fan, an air pipeline, an electric heater, an electric heater controller and a fluidized bed furnace, the air fan, the electric heater and the fluidized bed furnace are sequentially connected through the air pipeline, the fluidized bed furnace is filled with backing materials, and the electric heater controller is connected with the air pipeline. The electric heater is connected with an electric heater controller through a connecting wire; air enters the air fan through the air pipeline and then enters the electric heater through the air pipeline, and the air heated by the electric heater enters the fluidized bed furnace through the air pipeline. According to the utility model, closed ignition can be realized, no waste gas is discharged, and the environment-friendly requirement in the new era is realized; the electric heater is arranged in a multi-gear mode, gear control is carried out according to specific conditions, and then the purpose of saving energy is achieved. According to the utility model, the simultaneous heating of the conversion system in the acid making section can be realized, the preheating time of the system is shortened, and the energy-saving requirement is further met.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical industry, and particularly relates to an ignition device for a pyrite acid-making boiling furnace. Background Art

[0002] Before the pyrite acid system is started, the boiling furnace must be ignited and heated. When the temperature reaches ≥450℃ (that is, the natural temperature of pyrite), the material can be added and formal production can begin.

[0003] Traditional boiling furnace ignition methods include: diesel ignition, natural gas ignition, wood ignition, etc. The above ignition methods must have combustion exhaust gas discharged to pollute the atmosphere, and the lack of control measures leads to serious energy waste.

[0004] In response to the country's increasingly stringent environmental protection and energy-saving requirements, the utility model uses the electric heater ignition method for boiling furnace ignition to start the entire system, meeting the requirements of the new era of energy conservation, environmental protection and pollution-free. Utility Model Content

[0005] The utility model provides an ignition device for a pyrite acid-making fluidized bed furnace, so as to solve the problems in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A pyrite acid boiling furnace ignition device,

[0008] It includes an air blower 2, an air duct 4, an electric heater 5, an electric heater controller 6 and a boiling furnace 8. The air blower 2, the electric heater 5 and the boiling furnace 8 are connected in sequence through the air duct 4. The boiling furnace 8 is filled with a bottom material 7. The electric heater 5 is connected to the electric heater controller 6 through a connecting line.

[0009] The air enters the air blower 2 from the air duct 4 , and then enters the electric heater 5 through the air duct 4 . The air heated by the electric heater 5 enters the boiling furnace 8 through the air duct 4 .

[0010] Furthermore, the boiling furnace 8 is connected to the silo 9 via a belt feeder 10 .

[0011] An ignition device for a pyrite acid-making fluidized bed furnace also includes a muffler 1. The muffler 1 is installed at the air inlet of an air duct 4 at the air inlet end of an air blower 2. Its function is to eliminate noise generated by gas flow.

[0012] A pyrite acid boiling furnace ignition device also includes two regulating valves 3. The regulating valves 3 are installed on both end pipes of the air inlet and outlet of the air blower 2, wherein: the regulating valve 3 located on the air inlet pipe of the air blower 2 controls the air flow rate flowing into the air blower 2, and the regulating valve 3 located on the air outlet pipe of the air blower 2 controls the air flow rate flowing out of the air blower 2.

[0013] Furthermore, the bottom material 7 is sulfur-free pyrite slag, and the silo 9 stores qualified raw material pyrite for production.

[0014] Furthermore, the pyrite in the silo 9 is fed into the boiling furnace 8 via a belt feeder 10 .

[0015] Furthermore, the top of the boiling furnace 8 is connected to the post-acid production system.

[0016] Furthermore, the electric heater 5 and the electric heater controller 6 are two relatively independent structures, connected by a connecting line and controlled by buttons. The electric heater controller 6 controls the electric heater 5 using existing technology. Specifically, the electric heater 5 and the electric heater controller 6 are both existing technology and are purchased from the market. The electric heater 5 and the electric heater controller 6 are preferably manufactured by Nanjing Huiren. The specific specifications and models vary depending on the scale of the acid production.

[0017] Feeding process: When the temperature of the bottom material 7 is ≥450°C (i.e., it reaches the auto-ignition point of pyrite), the pyrite in the silo 9 is fed into the boiling furnace 8 through the belt feeder 10 for formal production. The pyrite spontaneously combusts to produce sulfur dioxide with a concentration of about 12%, which is the raw material for producing sulfuric acid in the subsequent process.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This utility model can realize closed ignition without any exhaust gas discharge, meeting the environmental protection requirements of the new era;

[0020] 2. The electric heater in this utility model has multiple gear settings, which can realize gear control according to specific conditions, thereby achieving the purpose of energy saving;

[0021] 3. The utility model can realize simultaneous temperature increase of the conversion system in the acid-making section, shortening the system preheating time, thereby further achieving energy-saving requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Among them: 1-muffler, 2-air fan, 3-regulating valve, 4-air duct, 5-electric heater, 6-electric heater controller, 7-bottom material, 8-boiling furnace, 9-silo, 10-belt feeder. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the embodiments.

[0025] like Figure 1 As shown, a pyrite acid-making fluidized bed furnace ignition device includes an air blower 2, an air duct 4, an electric heater 5, an electric heater controller 6 and a fluidized bed furnace 8. The air blower 2, the electric heater 5 and the fluidized bed furnace 8 are connected in sequence through the air duct 4. The fluidized bed furnace 8 is filled with bottom material 7. The electric heater 5 is connected to the electric heater controller 6 through a connecting line. The air enters the air blower 2 from the air duct 4, and then enters the electric heater 5 through the air duct 4. The air heated by the electric heater 5 enters the fluidized bed furnace 8 through the air duct 4. The top of the fluidized bed furnace 8 is connected to the post-acid production system. The fluidized bed furnace 8 is connected to the silo 9 through a belt feeder 10. Specifically, the pyrite in the silo 9 is fed into the fluidized bed furnace 8 through the belt feeder 10.

[0026] As a preferred solution, an ignition device for a pyrite acid boiling furnace also includes a muffler 1, which is installed at the air inlet of the air duct 4 at the air inlet end of the air blower 2; its function is to eliminate the noise generated by the gas flow.

[0027] As a preferred solution, an ignition device for a pyrite acid boiling furnace also includes two regulating valves 3, and regulating valves 3 are installed on both end pipes of the air inlet and outlet of the air blower 2, wherein: the regulating valve 3 located on the air inlet pipe of the air blower 2 controls the air flow rate flowing into the air blower 2, and the regulating valve 3 located on the air outlet pipe of the air blower 2 controls the air flow rate flowing out of the air blower 2.

[0028] As a preferred solution, a pyrite acid boiling furnace ignition device is provided, wherein the bottom material 7 is pyrite slag that does not contain sulfur, and the silo 9 stores qualified raw material pyrite for production.

[0029] As a preferred solution, the electric heater 5 and the electric heating controller 6 are two relatively independent structures, which are connected by a connecting line and controlled by buttons. The electric heating controller 6 controls the electric heater 5 according to the existing technology. Furthermore, the electric heater 5 and the electric heating controller 6 are two relatively independent structures, which are connected by a connecting line and controlled by buttons. The electric heating controller 6 controls the electric heater 5 according to the existing technology. Specifically, the electric heater 5 and the electric heater controller 6 are both existing technologies and are purchased from the market. The electric heater 5 and the electric heater controller 6 are preferably manufactured by Nanjing Huiren. The specific specifications and models are set according to the scale of the acid production.

[0030] The feeding process in the present invention is as follows: when the temperature of the bottom material 7 is ≥450°C (i.e., when it reaches the auto-ignition point of pyrite), the pyrite in the silo 9 is fed into the boiling furnace 8 through the belt feeder 10 for formal production. The pyrite obtains sulfur dioxide with a concentration of about 12% through spontaneous combustion, which is the raw material for producing sulfuric acid in the subsequent process.

[0031] The utility model sends air into the air duct 4 through the air blower 2, during which the air volume is adjusted by the regulating valve 3, the air is heated by the electric heater 5, and the electric heater 5 is adjusted by the electric heater controller 6. The heated air is mixed with the base material 7 to achieve the effect of heating the base material. When the temperature of the base material 7 reaches ≥450°C, that is, the auto-ignition point of pyrite is reached, the material can be added for formal production. The air mixed with the base material 7 enters the post-acid system from the top of the boiling furnace 8.

[0032] The purpose of the utility model of the ignition device of the pyrite acid-making boiling furnace is to realize an energy-saving and environmentally friendly start-up mode at the beginning of sulfuric acid production.

[0033] The utility model adopts the method of electric heater ignition, and adds an electric heater to the original process pipeline to heat the air entering the boiling furnace, thereby achieving the purpose of heating the bottom material of the boiling furnace. The electric heater can be set to a corresponding gear adjustment according to the size of the sulfuric acid to achieve energy saving.

[0034] The utility model can realize closed ignition without any exhaust gas discharge, thus meeting the environmental protection requirements of the new era;

[0035] The electric heater in this utility model has multiple gear settings, which can realize gear control according to specific conditions, thereby achieving the purpose of energy saving;

[0036] The utility model can realize simultaneous temperature increase of the conversion system of the acid-making section, shorten the system preheating time, and thus further achieve the energy-saving requirement.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pyrite acid boiling furnace ignition device, characterized by: The invention comprises an air blower (2), an air duct (4), an electric heater (5), an electric heater controller (6) and a fluidized bed furnace (8), wherein the air blower (2), the electric heater (5) and the fluidized bed furnace (8) are connected in sequence through the air duct (4), the fluidized bed furnace (8) is filled with a base material (7), and the electric heater (5) is connected to the electric heater controller (6) through a connecting line; air enters the air blower (2) from the air duct (4), and then enters the electric heater (5) through the air duct (4); the air heated by the electric heater (5) then enters the fluidized bed furnace (8) through the air duct (4).

2. The ignition device of a pyrite sulphuric acid boiling furnace according to claim 1, characterized in that: The boiling furnace (8) is connected to the silo (9) via a belt feeder (10).

3. The ignition device of a pyrite sulphuric acid boiling furnace according to claim 1, characterized in that: It also includes a silencer (1), which is installed at the air inlet of the air duct (4) at the air inlet end of the air blower (2).

4. The ignition device of a pyrite sulphuric acid boiling furnace according to claim 1, characterized in that: The invention also includes two regulating valves (3), and the regulating valves (3) are installed on both ends of the air inlet and outlet pipes of the air blower (2), wherein the regulating valve (3) located on the air inlet pipe of the air blower (2) controls the air flow rate flowing into the air blower (2), and the regulating valve (3) located on the air outlet pipe of the air blower (2) controls the air flow rate flowing out of the air blower (2).

5. The ignition device of a pyrite sulphuric acid boiling furnace according to claim 2, characterized in that: The bottom material (7) is sulfur-free pyrite slag, and the silo (9) stores qualified raw material pyrite for production.

6. The ignition device of a pyrite sulphuric acid boiling furnace according to claim 2, characterized in that: The pyrite in the silo (9) is fed into the boiling furnace (8) via a belt feeder (10).

7. The ignition device of a pyrite sulphuric acid boiling furnace according to claim 2, characterized in that: When the temperature of the bottom material (7) is ≥450°C, i.e., reaches the natural temperature of the pyrite, the pyrite in the silo (9) is fed into the boiling furnace (8) for formal production.

8. The ignition device of a pyrite-based acid-making fluidized bed furnace according to claim 1, characterized in that: The top of the boiling furnace (8) is connected to the post-acid production system.

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