CN117073009A - Mannheim furnace analytical gas ignition system - Google Patents

Abstract

The invention discloses a Mannheim furnace analytical gas ignition system, which includes an analytical gas inlet main pipe. The end of the analytical gas inlet main pipe is connected to a first air inlet branch pipe and a second air inlet branch pipe. The first air inlet branch pipe and The ends of the second air inlet branch pipes are connected to the burner; the burner includes a first casing, and a second casing, a third casing and a fourth casing arranged coaxially with the first casing; Two ignition rods are provided in the clamping cavity between the first casing and the second casing. The two ignition rods are distributed on both sides of the first casing. One end of the ignition rod passes through the end of the second casing. , the exit end of the ignition rod is installed in the push-pull plate. The ignition system provided by the invention can achieve efficient and complete mixing of gas and combustion air, ensure a balanced ratio of air and gas, ensure combustion stability and good outlet temperature distribution, and extend the service life of the ignition rod.

Description

Mannheim furnace analytical gas ignition system

Technical field

The invention relates to an ignition system, specifically to a Mannheim furnace analytical gas ignition system, which belongs to the technical field of potassium sulfate production.

Background technique

The Mannheim furnace, also known as the potassium sulfate reactor, is the core equipment for the Mannheim process to produce potassium sulfate. The entire furnace consists of a combustion chamber, a reaction chamber, a stirrer, two burners, a feeder and a discharge port, etc. composition. The Mannheim furnace is made of high-temperature resistant refractory bricks, insulation bricks and ordinary red bricks. The top of the furnace is insulated with insulation bricks and asbestos. The reaction furnace has two cavities. The middle oval cavity is the reaction chamber. Sulfuric acid and potassium chloride are evenly added into the Mannheim furnace reaction chamber through the feeder. The cavity of the reaction chamber is the combustion chamber, and the combustion chamber is equipped with a burner. , the heat released by the fuel indirectly heats the reaction chamber. There is a stirring rake in the chamber. The rake rotates during the reaction, and the sulfuric acid and potassium chloride are continuously mixed and reacted to generate potassium sulfate and hydrogen chloride gas. The potassium sulfate is pushed out when stirred by the stirring rake, and the hydrogen chloride gas is recycled.

At present, the ignition system used in Mannheim furnaces generally has the following technical problems during use:

The burner outputs gas in the middle, and the peripheral combustion air surrounds the middle gas for mixing. It cannot mix efficiently and completely, resulting in incomplete combustion. To allow the gas to fully burn, more air must be added, but more additional air must be added to make the air The ratio of air to gas is unbalanced, and too much air leads to a decrease in combustion temperature, which cannot meet the company's production standards. The mixture of air and gas is generally ignited by an ignition rod, and the ignition end of the ignition rod is located in the flame burning zone for a long time. , resulting in a generally short service life of the ignition rod.

Contents of the invention

In view of the deficiencies in the background technology, the present invention provides a Mannheim furnace analytical gas ignition system, which can realize efficient and complete mixing of gas and combustion air, ensure a balanced ratio of air and gas, and ensure combustion stability and a good outlet. Temperature distribution; can extend the service life of the ignition rod.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

The Mannheim furnace analytical gas ignition system includes an analytical gas inlet main pipe. The end of the analytical gas inlet main pipe is connected to the first gas inlet branch pipe and the second gas inlet branch pipe. The first gas inlet branch pipe and the second gas inlet branch pipe are connected to each other. The ends are connected to the burner;

The burner includes a first casing, and a second casing, a third casing and a fourth casing arranged coaxially with the first casing are sequentially placed outside the first casing;

The end of the first casing is provided with a first air inlet, the first air inlet is connected to the end of the first air inlet branch pipe, and the inner cavity is connected; the second casing, the third casing and the fourth casing One end of the casing is blocked. The second casing is provided with a second air inlet on one side close to the blocked end. The third casing is provided with a third air inlet on one side close to the blocked end. The third air inlet is connected to the blocked end. The ends of the second air inlet branch pipe are connected, and a fourth air inlet is provided on the side of the fourth casing near the blocked end;

Two ignition rods are provided in the clamping cavity between the first casing and the second casing. The two ignition rods are distributed on both sides of the first casing. One end of the ignition rod passes through the end of the second casing. , the exit end of the ignition rod is installed in the push-pull plate.

Further, the nominal diameter of the analytical air inlet main pipe and the second air inlet branch pipe is 65 mm, and the nominal diameter of the first air inlet branch pipe is 20 mm.

Furthermore, the analytical gas inlet main pipe is equipped with a pressure gauge A, a ball valve, a filter and a test pin in sequence in the gas flow direction. The range of the pressure gauge A is 1.6MPa, and the nominal diameter of the ball valve is 65mm.

Further, the first air inlet branch pipe is sequentially installed with a solenoid valve A, a stop valve B and a pressure gauge B in the gas flow direction. The range of the pressure gauge B is 60kpa.

Further, the second air inlet branch pipe is sequentially installed with a solenoid valve B, a stop valve B and a pressure gauge C in the gas flow direction. The range of the pressure gauge C is 60kpa.

Further, the second air inlet is connected to fan A through a pipeline, and a butterfly valve A is installed on the pipeline; the fourth air inlet is connected to fan B through a pipeline, and a butterfly valve B is installed on the pipeline.

Further, an air distribution disk is installed on the outside of the end of the third sleeve. The air distribution disk is arranged close to the Mannheim furnace furnace, and the air distribution disk is uniformly distributed with air flow holes.

Further, the push-pull plate has an annular structure and is located outside the end of the second casing; the push-pull plate is connected to the telescopic cylinder, and the number of telescopic cylinders is two, distributed on both sides of the end of the second casing.

Further, a plurality of ignition rod clips slidably arranged with the ignition rod are fixed on the outer wall of the first sleeve.

Further, the ignition rod is connected to the igniter through an ignition cable, and the igniter is electrically connected to the electric control box, solenoid valve A and solenoid valve B; the electric control box is also connected to fan A, fan B and thermocouple. Electrical connection.

After adopting the above technical solution, the present invention has the following advantages compared with the existing technology:

The analytical gas flows from the analytical gas inlet main pipe to the first and second air inlet branch pipes, and then enters the first and third casings. At the same time, the air enters the second casing under the action of fan A. In the sandwich cavity between the first casing and the first casing, the air enters the sandwich cavity between the fourth casing and the third casing under the action of fan B. The cross-sections of the mixed air flow formed are the middle analytical air from the inside to the outside. , annular combustion air, annular analytical gas and annular combustion air to achieve efficient and complete mixing of gas and combustion air, ensuring that analytical gas and air are well mixed before participating in combustion, ensuring a balanced ratio of air and gas, reasonably controlling the combustion area, and ensuring Combustion stability and good outlet temperature distribution.

The mixed air flow is ignited through two ignition rods arranged side by side to improve the reliability of the ignition system and the probability of ignition; after the ignition is completed, the telescopic cylinder drives the push-pull plate to drive the ignition rod to expand and contract, so that the end of the ignition rod exits the flame combustion in time area to ensure the service life of the ignition rod.

The invention adopts functions such as automatic ignition, gas over-pressure and low-pressure protection, automatic cut-off when power is off, fan sequence chain protection, automatic fire blocking and other functions, enabling independent operation and alarm indication on site or in the control room.

The present invention will be described in detail below with reference to the drawings and examples.

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a schematic structural diagram of the burner in the present invention;

Figure 3 is an enlarged view of the structure at M in Figure 2;

Figure 4 is an enlarged view of the structure at position N in Figure 2.

In the figure, 1-analyzed gas inlet main pipe, 2-first air inlet branch pipe, 3-second air inlet branch pipe, 4-burner, 401-first casing, 402-second casing, 403-third Casing, 404-fourth casing, 405-first air inlet, 406-second air inlet, 407-third air inlet, 408-fourth air inlet, 409-ignition rod, 410-ignition Rod clamp, 411-push-pull plate, 412-telescopic cylinder, 413-air distribution plate, 5-pressure gauge A, 6-ball valve, 7-filter, 8-test pin, 9-solenoid valve A, 10-stop valve B, 11-pressure gauge B, 12-solenoid valve B, 13-stop valve B, 14-pressure gauge C, 15-igniter, 16-electric control box, 17-fan A, 18-butterfly valve A, 19-fan B, 20-butterfly valve B, 21-thermocouple.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings.

The invention provides a Mannheim furnace analytical gas ignition system, which is suitable for the Mannheim furnace of 10,000 t/a potassium sulfate. The components of the analytical gas are about 40% methane, about 20% hydrogen, and the rest is trace gas ammonia. .

As shown in Figures 1 to 4 together, the present invention provides a Mannheim furnace analytical gas ignition system, including an analytical gas inlet main pipe 1, the end of the analytical gas inlet main pipe 1 and the first gas inlet branch pipe 2 and the The two air inlet branch pipes 3 are connected, and the ends of the first air inlet branch pipe 2 and the second air inlet branch pipe 3 are connected to the burner 4 .

The analyzed gas is diverted from the analyzed gas inlet main pipe 1 to the first air inlet branch pipe 2 and the second air inlet branch pipe 3, and then enters the burner 4 to be ignited.

The nominal diameter of the analytical gas inlet main pipe 1 and the second air inlet branch pipe 3 is 65mm, and the nominal diameter of the first air inlet branch pipe 2 is 20mm.

The analytical gas inlet main pipe 1 is equipped with a pressure gauge A5, a ball valve 6, a filter 7 and a test pin 8 in sequence in the gas flow direction. The measuring range of pressure gauge A5 is 1.6MPa, and the nominal diameter of ball valve 6 is 65mm.

The first air inlet branch pipe 2 is sequentially installed with a solenoid valve A9, a stop valve B10 and a pressure gauge B11 in the gas flow direction. The pressure gauge B11 has a range of 60kpa.

The second air inlet branch pipe 3 is sequentially installed with a solenoid valve B12, a stop valve B13 and a pressure gauge C14 in the gas flow direction. The pressure gauge C14 has a range of 60kpa.

The burner 4 includes a first sleeve 401, and a second sleeve 402, a third sleeve 403 and a fourth sleeve 404 arranged coaxially with the first sleeve 401.

The end of the first casing 401 is provided with a first air inlet 405. The first air inlet 405 is connected to the end of the first air inlet branch pipe 2. The first air inlet branch pipe 2 is connected to the inner cavity of the first casing 401. Pass, the analysis gas enters the first casing 401 from the first air inlet branch pipe 2.

One ends of the second casing 402, the third casing 403 and the fourth casing 404 are all sealed.

A second air inlet 406 is provided on the side of the second casing 402 close to the blocking end. The second air inlet 406 is connected to the fan A17 through a pipeline, and a butterfly valve A18 is installed on the pipeline. The air enters the sandwich cavity between the second casing 402 and the first casing 401 under the action of the fan A17.

A third air inlet 407 is provided on the side of the third casing 403 close to the blocked end. The third air inlet 407 is connected to the end of the second air inlet branch pipe 3. The analyzed gas enters the third air inlet branch pipe 3 from the second air inlet branch pipe 3. In the clamping cavity between the sleeve 403 and the second sleeve 402.

A fourth air inlet 408 is provided on the side of the fourth casing 404 close to the blocking end. The fourth air inlet 408 is connected to the fan B19 through a pipeline, and a butterfly valve B20 is installed on the pipeline. The air enters the sandwich cavity between the fourth casing 404 and the third casing 403 under the action of the fan B19.

An air distribution disk 413 is installed on the outside of the end of the third sleeve 403. The air distribution disk 413 is arranged close to the Mannheim furnace furnace, and the air distribution disk 413 is uniformly distributed with air flow holes.

Two ignition rods 409 are provided in the sandwich cavity between the first casing 401 and the second casing 402. The two ignition rods 409 are distributed on both sides of the first casing 401. One end of the ignition rod 409 extends from the first casing 401 to the second casing 402. The ends of the second casing 402 pass out.

The penetrating end of the ignition rod 409 is installed in the push-pull plate 411. The push-pull plate 411 has an annular structure. The push-pull plate 411 is located outside the end of the second sleeve 402. The push-pull plate 411 is connected to the telescopic cylinder 412. There are two telescopic cylinders 412, which are distributed on both sides of the end of the second sleeve 402.

The telescopic cylinder 412 drives the ignition rod 409 to expand and contract by driving the push-pull plate 411, so that the end of the ignition rod 409 exits the flame combustion zone in time to ensure the service life of the ignition rod 409.

A plurality of ignition rod clamps 410 slidably arranged with the ignition rod 409 are fixed on the outer wall of the first sleeve 401. The ignition rod clamps 410 ensure the straightness of the ignition rod 409 during expansion and contraction.

The ignition rod 409 is connected to the igniter 15 through an ignition cable, and the igniter 15 is electrically connected to the electric control box 16, the solenoid valve A9 and the solenoid valve B12.

The electric control box 16 is also electrically connected to the fan A17, the fan B19 and the thermocouple 21. The thermocouple 21 is used to detect the combustion temperature in the Mannheim furnace in real time.

The specific working principle of the present invention:

The analyzed gas is diverted from the analyzed gas inlet main pipe 1 to the first air inlet branch pipe 2 and the second air inlet branch pipe 3, and then enters the first casing 401 and the third casing 403; at the same time, the air acts on the fan A17 The air enters the sandwich cavity between the second casing 402 and the first casing 401, and the air enters the clamp cavity between the fourth casing 404 and the third casing 403 under the action of the fan B19, forming a mixed air flow. The cross-section from the inside to the outside is the middle analytical gas, annular combustion air, annular analytical gas and annular combustion air, ensuring that the analytical gas and air are well mixed before participating in combustion, and the combustion area is reasonably controlled to ensure combustion stability and good outlet temperature. distributed.

The mixed airflow is ignited through two ignition rods 409 arranged side by side to improve the reliability and ignition probability of the ignition system; after the ignition is completed, the telescopic cylinder 412 drives the push-pull plate 411 to drive the ignition rod 409 to expand and contract in the linear direction, so that the ignition rod The end of the ignition rod 409 exits the flame burning area in time to ensure the service life of the ignition rod 409.

The above are examples of the best embodiments of the present invention, and parts not described in detail are common knowledge to those of ordinary skill in the art. The protection scope of the present invention is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present invention is also within the protection scope of the present invention.

Claims (10)

1. Mannheim furnace analytical gas ignition system, characterized by: including an analytical gas inlet main pipe (1), the end of the analytical gas inlet main pipe (1) and the first gas inlet branch pipe (2) and the second gas inlet branch pipe (3) are connected, and the ends of the first air inlet branch pipe (2) and the second air inlet branch pipe (3) are connected to the burner (4); The burner (4) includes a first casing (401), and a second casing (402), a third casing (403) and a fourth casing arranged coaxially with the first casing (401). (404); The end of the first casing (401) is provided with a first air inlet (405). The first air inlet (405) is connected to the end of the first air inlet branch pipe (2), and the inner cavity is connected; the second One end of the casing (402), the third casing (403) and the fourth casing (404) are all blocked, and the second casing (402) is provided with a second air inlet ( 406), the third casing (403) is provided with a third air inlet (407) on one side close to the blocked end, and the third air inlet (407) is connected to the end of the second air inlet branch pipe (3). A fourth air inlet (408) is provided on the side of the four sleeves (404) close to the blocking end; Two ignition rods (409) are provided in the clamping cavity between the first casing (401) and the second casing (402). The two ignition rods (409) are distributed on both sides of the first casing (401). , one end of the ignition rod (409) passes through the end of the second sleeve (402), and the exit end of the ignition rod (409) is installed in the push-pull plate (411). 2. The Mannheim furnace analytical gas ignition system as claimed in claim 1, characterized in that: the nominal diameters of the analytical gas inlet main pipe (1) and the second gas inlet branch pipe (3) are 65mm, and the first gas inlet branch pipe has a nominal diameter of 65 mm. (2) The nominal diameter is 20mm. 3. The Mannheim furnace analytical gas ignition system according to claim 1, characterized in that: the analytical gas inlet main pipe (1) is sequentially installed with a pressure gauge A (5), a ball valve (6), The filter (7) and the test pin (8), the range of the pressure gauge A (5) is 1.6MPa, and the nominal diameter of the ball valve (6) is 65mm. 4. The Mannheim furnace analytical gas ignition system according to claim 1, characterized in that: the first air inlet branch pipe (2) is sequentially installed with a solenoid valve A (9) and a stop valve B (10) in the gas flow direction. ) and pressure gauge B (11), the range of pressure gauge B (11) is 60kpa. 5. The Mannheim furnace analytical gas ignition system according to claim 1, characterized in that: the second air inlet branch pipe (3) is equipped with a solenoid valve B (12) and a stop valve B (13) in the gas flow direction. ) and pressure gauge C (14), the range of pressure gauge C (14) is 60kpa. 6. The Mannheim furnace analytical gas ignition system according to claim 1, characterized in that: the second air inlet (406) is connected to the fan A (17) through a pipeline, and a butterfly valve A (18) is installed on the pipeline. ); the fourth air inlet (408) is connected to the fan B (19) through a pipeline, and a butterfly valve B (20) is installed on the pipeline. 7. The Mannheim furnace analytical gas ignition system according to claim 1, characterized in that: an air distribution disk (413) is installed outside the end of the third casing (403), and the air distribution disk (413) is installed on the outside of the end of the third casing (403). 413) is installed close to the Mannheim furnace furnace, and the air distribution plate (413) is evenly distributed with air flow holes. 8. The Mannheim furnace analytical gas ignition system according to claim 1, characterized in that: the push-pull plate (411) has an annular structure, and the push-pull plate (411) is located outside the end of the second casing (402); The push-pull plate (411) is connected to the telescopic cylinder (412). There are two telescopic cylinders (412), which are distributed on both sides of the end of the second casing (402). 9. The Mannheim furnace analytical gas ignition system according to claim 1, characterized in that: a plurality of ignition rods slidably arranged with the ignition rod (409) are fixed on the outer wall of the first casing (401). card(410). 10. The Mannheim furnace analytical gas ignition system according to claim 1, characterized in that: the ignition rod (409) is connected to the igniter (15) through an ignition cable, and the igniter (15) is connected to the electronic control unit. The box (16), solenoid valve A (9) and solenoid valve B (12) are electrically connected; the electric control box (16) is also electrically connected to the fan A (17), fan B (19) and thermocouple (21). connect.