Sulfuric gas-containing catalyst sintering furnace

Abstract

The utility model provides a sintering furnace for a catalyst containing sulfuric acid gas, and belongs to the field of catalyst sintering furnaces. The problem that the activity of a catalyst in the sintering process is affected due to the fact that an existing sintering furnace is uneven in mixing and free of preheating is solved. The energy-saving and environment-friendly boiler comprises two boiler inner containers, four air distribution pipes, two mixed gas coil pipes and a heating structure, the two air distribution pipes are arranged on the lower portion of each boiler inner container, the mixed gas coil pipes are S-shaped combined coil pipes and are arranged on the rear portions of the boiler inner containers, outlets of the mixed gas coil pipes are connected with the air distribution pipes, and the heating structure is arranged outside the boiler inner containers. The double-furnace inner container structure is adopted, under the same production capacity, the occupied area is small, meanwhile, the defect that a conventional catalyst sintering furnace is low in production efficiency is overcome, and the production efficiency of the sintering furnace is improved; mixed gas is preheated when passing through the mixed gas coil pipe in the furnace inner container, the air distribution pipe enables the mixed gas to be distributed more evenly in the furnace inner container, temperature field distribution is relatively even, and therefore the physical and chemical performance of a catalyst is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of catalyst sintering furnace, in particular to a kind of sulfur-containing acidic gas catalyst sintering furnace. BACKGROUND

[0002] Sulfur-containing acidic gas catalyst production process includes: 1) catalyst raw material processing and mixing;2) catalyst forming and pretreatment;3) catalyst sintering;4) catalyst inspection and storage;Among them: catalyst sintering is carried out in sulfur-containing acidic gas catalyst sintering furnace.Catalyst improves the following physical and chemical properties by sintering:

[0003] 1) remove impurities in catalyst

[0004] In the sintering process, water, organic matter, oxide and other impurities in the catalyst will be eliminated, so that the chemical composition of the catalyst is more pure, thereby improving its stability and service life.

[0005] 2) increase catalyst activity, accelerate reaction rate

[0006] Sintering can make the active components in the catalyst better dispersed, the pore structure more developed, form more micropores and mesopores, increase the specific surface area of catalyst, so that the reactants can more easily enter the catalyst surface, and accelerate the reaction speed.

[0007] 3) improve thermal stability

[0008] Sintering treatment can increase the stability of catalyst material, so that it can better withstand the reaction under high temperature environment, thereby improving the thermal stability of catalyst.

[0009] The current conventional sintering furnace catalyst has the following problems, first, nitrogen and hydrogen enter the inner barrel from different pipelines, and mixed gas participates in the sintering process without being mixed evenly, second, mixed gas does not go through preheating process, directly enters the inner barrel, which can cause uneven local temperature distribution in the inner barrel, the above two problems will affect the activity of catalyst in sintering process, reduce the quality of catalyst, the third problem of conventional sintering furnace is that the volume of inner barrel is small, and there is only one, the catalyst placed at a time is less, and the production efficiency is not high. UTILITY MODEL CONTENTS

[0010] Therefore, in order to solve the problems of uneven mixing and no preheating of the existing sintering furnace mentioned in the background art, thereby affecting the activity of the catalyst in the sintering process, the utility model provides a sulfur-containing acidic gas catalyst sintering furnace. In the sulfur dioxide catalytic oxidation process technology, the sulfur conversion rate is the core technical index in the chemical process technology, and under the condition that the oxygen content and the temperature are appropriate, the physicochemical performance of the catalyst directly affects the sulfur dioxide catalytic oxidation efficiency. The improvement of the physicochemical performance of the catalyst is realized by sintering in the sintering furnace, and the sulfur-containing acidic gas catalyst sintering furnace is a key link for ensuring the quality of the catalyst and can greatly improve the physicochemical performance of the catalyst.

[0011] In order to achieve the above object, the utility model adopts the following technical scheme: a sulfur-containing acidic gas catalyst sintering furnace, including 2 furnace inner cans, 4 air distribution pipes, 2 mixed gas coil pipes and a heating structure, 2 air distribution pipes are arranged at the lower part of each furnace inner can, the mixed gas coil pipe is an S-shaped combined coil pipe, is arranged at the rear part of the furnace inner can, the outlet of the mixed gas coil pipe is connected with the air distribution pipe, and the outer part of the furnace inner can is provided with the heating structure.

[0012] Furthermore, the air distribution pipe is provided with a plurality of holes, and a nozzle is welded at the outlet of each hole.

[0013] Furthermore, the outer part of the furnace inner can is a furnace wall, the outer part of the furnace wall is an outer furnace wall, and the outer furnace wall is built in the frame.

[0014] Furthermore, the furnace door is installed on the furnace mouth water cooling jacket through a hinge, and the furnace door is completely sealed with the furnace mouth water cooling jacket.

[0015] Furthermore, the furnace mouth water cooling jacket is welded on the outer wall plate of the furnace wall, a cooling water inlet pipe is installed at one end of the furnace mouth water cooling jacket, and a cooling water outlet pipe is installed at the other end.

[0016] Furthermore, the heating structure is a plurality of resistance heaters, the resistance heaters are arranged in the internal cavity of the furnace wall along the depth direction of the furnace inner can.

[0017] Furthermore, a vacuum pipe is welded on the top of the furnace inner can and penetrates the outer furnace wall, and a vacuum valve is installed on each vacuum pipe.

[0018] Furthermore, a thermometer and a pressure gauge are arranged at the upper rear part of each furnace inner can, and are used for measuring the temperature and the pressure of the furnace inner can.

[0019] Furthermore, an air outlet pipe is welded on the top of the furnace inner can and penetrates the outer furnace wall, and an air outlet valve is installed on each air outlet pipe.

[0020] Furthermore, the furnace door is installed on the furnace mouth water cooling jacket through a hinge, and the furnace door is completely sealed with the furnace mouth water cooling jacket.

[0021] Furthermore, the electrical control box is installed in the bracket space on the outer side of the furnace wall to control the temperature, pressure, and flow rates of hydrogen and nitrogen.

[0022] Furthermore, the mixing coil is connected to a mixing gas inlet valve, the outlet of the air mixer is connected to the mixing gas inlet valve, the nitrogen inlet pipe is connected to the nitrogen inlet valve, the nitrogen inlet valve is connected to the air mixer inlet, and the hydrogen inlet pipe is connected to the hydrogen inlet valve, which is connected to the air mixer inlet.

[0023] Compared with the prior art, the beneficial effects of the sulfuric acid-containing gas catalyst sintering furnace described in this utility model are:

[0024] 1. This utility model proposes a sintering furnace for sulfuric acid-containing gas catalysts. During the sintering process, the mixed gas is preheated when it passes through the mixed gas coil inside the furnace liner. By setting an air distribution pipe at the bottom of the furnace liner, the mixed gas is more evenly distributed inside the furnace liner, and the temperature field is relatively uniform, thereby improving the physical and chemical properties of the catalyst.

[0025] 2. This utility model adopts a double furnace inner liner structure, which occupies a small area under the same production capacity, and at the same time makes up for the low production efficiency of conventional catalyst sintering furnaces, thereby improving the production efficiency of sintering furnaces. Attached Figure Description

[0026] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0027] Figure 1 This is a front view of the sulfuric acid-containing gas catalyst sintering furnace described in this utility model.

[0028] Figure 2 for Figure 1 AA section view;

[0029] Figure 3 for Figure 1 BB section view;

[0030] Figure 4 for Figure 3 CC section view;

[0031] Figure 5 This is a schematic diagram of the furnace liner structure;

[0032] Figure 6 for Figure 5 DD sectional view;

[0033] Figure 7 This is the front view of the air distribution duct;

[0034] Figure 8 for Figure 7 left view of the figure;

[0035] In the figure: cooling water outlet pipe 1, furnace door 2, cooling water inlet pipe 3, air distribution pipe 4, electrical control box 5, resistance heater 6, frame 7, vacuum pipe 8, vacuum valve 9, gas outlet valve 10, gas outlet pipe 11, thermometer 12, pressure gauge 13, mixed gas coil 14, mixed gas inlet valve 15, air mixer 16, hydrogen gas inlet valve 17, nitrogen gas inlet valve 18, nitrogen gas inlet pipe 19, hydrogen gas inlet pipe 20, furnace mouth water cooling jacket 21, furnace inner shell 22, furnace outer wall 23 DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0037] Reference Figures 1-8 In order to illustrate the embodiment, a sulfur-containing acid gas catalyst sintering furnace comprises a cooling water outlet pipe 1, a furnace door 2, a cooling water inlet pipe 3, four air distribution pipes 4, an electrical control box 5, 34 resistance heaters 6, a frame 7, two vacuum pipes 8, two vacuum valves 9, a gas outlet valve 10, a gas outlet pipe 11, two thermometers 12, two pressure gauges 13, two mixed gas coils 14, two mixed gas inlet valves 15, an air mixer 16, a hydrogen gas inlet valve 17, a nitrogen gas inlet valve 18, a nitrogen gas inlet pipe 19, a hydrogen gas inlet pipe 20, two furnace mouth water cooling jackets 21, two furnace inner shells 22 and a furnace outer wall 23.

[0038] The utility model arranges two parallel furnace inner shells 22, improves production efficiency, and occupies small area under the same production capacity.

[0039] The furnace outer wall 23 is built in the frame 7, the furnace inner shell 22 is placed inside the furnace outer wall 23 and fixed with the furnace wall outer panel, the furnace mouth water cooling jacket 21 is welded on the furnace wall outer panel, the resistance heater 6 is arranged in the cavity of the furnace wall and along the direction of the furnace inner shell 22.

[0040] Two air distribution pipes 4 are arranged at the lower part of each furnace inner shell 22, the gas outlet pipe 11 is welded at the top of the furnace inner shell 22 and penetrates the furnace outer wall 23, the vacuum pipe 8 is welded at the top of the furnace inner shell 22 and penetrates the furnace outer wall 23, and the thermometer 12 and the pressure gauge 13 are arranged at the upper part of the furnace inner shell 22 and are used to measure the temperature and pressure of the furnace inner shell 22.

[0041] Nitrogen inlet pipe 19 is connected with nitrogen inlet valve 18, nitrogen inlet valve 18 is connected with the inlet of air mixer 16, hydrogen inlet pipe 20 is connected with hydrogen inlet valve 17, hydrogen inlet valve 17 is connected with the inlet of air mixer 16, the outlet of air mixer 16 is connected with mixed gas inlet valve 15, mixed gas inlet valve 15 is connected with mixed gas coil 14, the outlet of mixed gas coil 14 is welded with air distribution pipe 4, so that mixed gas enters into the inside of furnace inner shell 22 through air distribution pipe 4.

[0042] Furnace door 2 is hingedly installed on furnace mouth water cooling jacket 21, and furnace door 2 is completely sealed with furnace mouth water cooling jacket 21.

[0043] Electric control box 5 is installed in the support space outside the outer wall 23 of the furnace, and is used for controlling the temperature, pressure, hydrogen flow and nitrogen flow.

[0044] Mixed gas coil 14 is an S-shaped combined coil, which is arranged at the rear cavity of furnace inner shell 22, so as to prolong the path of mixed gas and increase the preheating time.

[0045] Air distribution pipe 4 is provided with a plurality of holes, and nozzles are welded at the outlets of the holes.

[0046] The operation process of the sulfur-containing acid gas catalyst sintering furnace is as follows:

[0047] Before starting the sintering furnace, the sulfur-containing acid gas catalyst is placed in the furnace inner shell 22 through the tray, the furnace door 2 is closed, and the handle of the furnace door 2 is tightened, and the power is connected. Then start the sulfur-containing acid gas catalyst sintering furnace, the specific operation is as follows:

[0048] 1. First, the "furnace inner shell air replacement" operation is carried out: the outlet of vacuum pipe 8 is connected with vacuum pump, and the vacuum pump is started, then the vacuum valve 9 is opened, when the pressure monitoring value of the furnace inner shell 22 reaches the set pressure, the vacuum pump valve body and the vacuum pump are closed, then the mixed gas inlet valve 15 and the nitrogen inlet valve 18 are opened, and the nitrogen inlet flow is set. In this way, nitrogen enters the inside of the furnace inner shell 22. When the pressure monitoring value of the furnace inner shell 22 is positive or normal pressure, the mixed gas inlet valve 15 and the nitrogen inlet valve 18 are closed. After the "furnace inner shell air replacement" operation is carried out for three times, the furnace inner shell 22 is slightly positive pressure or normal pressure, the hydrogen inlet valve 17 is opened, the nitrogen and hydrogen are kept in the state of inlet, the outlet valve behind the furnace is opened, and the "furnace inner shell air replacement" operation is completed. At this time, most of the furnace is filled with nitrogen and a small amount of hydrogen.

[0049] 2. Then, the cooling water inlet pipe 3 is connected to the outlet of the circulating water, and the cooling water outlet pipe 1 is connected to the inlet of the circulating water, so that a circulating cooling water system is formed, which protects the sealing elements of the furnace door 2 and the furnace mouth water cooling jacket 21, and ensures the sealing property of the furnace door 2 and the furnace mouth water cooling jacket 21.

[0050] 3. Finally, the resistance heater 6 is started. The arrangement of multiple resistance heaters 6 makes the temperature of the furnace liner 22 more uniform until the temperature of the furnace liner 22 reaches the appropriate working temperature. During the heating process, the flow rates of nitrogen and hydrogen in the mixed gas are adjusted to reach the set values ​​to ensure that the catalyst is sintered under reasonable mixed gas conditions. The mixed gas is preheated through the mixed gas coil 14. At this time, the sintering furnace enters the working state. According to the time points set by the catalyst sintering curve, the catalyst is sintered after heat preservation and gradual cooling.

[0051] The embodiments of the present invention disclosed above are merely illustrative of the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A sulfuric acid gas containing catalyst sintering furnace characterized by: It comprises two furnace liners (22), four air distribution pipes (4), two mixed gas coils (14) and heating structure, two air distribution pipes (4) are arranged at the lower part of each furnace liner (22), the mixed gas coil (14) is an S-shaped combined coil and is arranged at the rear part of the furnace liner (22), the outlet of the mixed gas coil (14) is connected with the air distribution pipe (4), and the furnace liner (22) is externally provided with the heating structure.

2. The sulfuric acid gas containing catalyst sintering furnace according to claim 1, characterized by: The air distribution pipe (4) is provided with a plurality of holes, and a nozzle is welded at the outlet of each hole.

3. The sulfuric acid gas containing catalyst sintering furnace according to claim 1, characterized by: The outer part of the furnace liner (22) is a furnace wall, and the outer part of the furnace wall is an outer furnace wall (23) which is built in a frame (7).

4. The sulfuric acid gas containing catalyst sintering furnace according to claim 3, characterized by: The furnace door (2) is hingedly installed on the furnace mouth water cooling jacket (21), and the furnace door (2) is completely sealed with the furnace mouth water cooling jacket (21).

5. The sulfuric acid gas containing catalyst sintering furnace according to claim 4, characterized by: The furnace mouth water cooling jacket (21) is welded on the outer wall plate of the furnace wall, and the furnace mouth water cooling jacket (21) is provided with a cooling water inlet pipe (3) at one end and a cooling water outlet pipe (1) at the other end.

6. The sulfuric acid gas containing catalyst sintering furnace according to claim 3, characterized by: The heating structure is a plurality of resistance heaters (6), and the resistance heaters (6) are arranged in the internal cavity of the furnace wall along the depth direction of the furnace liner (22).

7. The sulfuric acid gas containing catalyst sintering furnace according to claim 3, characterized by: A vacuum pipe (8) is welded on the top of the furnace liner (22) and penetrates the outer furnace wall (23), and a vacuum valve (9) is arranged on each vacuum pipe (8); an exhaust pipe (11) is welded on the top of the furnace liner (22) and penetrates the outer furnace wall (23), and an exhaust valve (10) is arranged on each exhaust pipe (11).

8. The sulfuric acid gas containing catalyst sintering furnace according to claim 3, characterized by: A thermometer (12) and a pressure gauge (13) are arranged at the upper rear part of each furnace liner (22) for measuring the temperature and pressure of the furnace liner (22).

9. The sulfuric acid gas containing catalyst sintering furnace according to claim 3, characterized by: An electrical control box (5) is arranged in the support space outside the outer furnace wall (23) for controlling the temperature, pressure, hydrogen flow and nitrogen flow.

10. The sulfuric acid gas containing catalyst sintering furnace according to claim 1, characterized by: The mixed gas inlet valve (15) is connected with the mixed gas coil (14), the outlet of the air mixer (16) is connected with the mixed gas inlet valve (15), the nitrogen inlet pipe (19) is connected with the nitrogen inlet valve (18), the nitrogen inlet valve (18) is connected with the inlet of the air mixer (16), the hydrogen inlet pipe (20) is connected with the hydrogen inlet valve (17), and the hydrogen inlet valve (17) is connected with the inlet of the air mixer (16).

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