Novel hydrogen chloride synthesis furnace

Abstract

The utility model discloses a novel hydrogen chloride synthesis furnace which comprises a first furnace body, a second furnace body, a third furnace body and a furnace bottom, and a combustion part is arranged in the first furnace body; the lower end of the first furnace body is sequentially connected with the second furnace body, the third furnace body and the furnace bottom through bolts; a vortex device is arranged in the upper end of the first furnace body; three baffle plates are arranged on each of two side walls in the second furnace body in a mutually crossed manner; a graphite block A, a graphite block B, a graphite block C, a graphite block D, a graphite block E and a graphite block F are arranged in the third furnace body from top to bottom. The device effectively improves the equipment operation cycle, linearly reduces the maintenance frequency, and reduces the maintenance cost and spare part loss cost. According to the device, the graphite block is effectively prevented from being scoured, corroded and cracked; the operation cycle of the equipment is effectively prolonged, and the operation cycle of the equipment is prolonged to 1-2 years from original 3 months; and the maintenance frequency is linearly reduced and is reduced from the original once in February to once in two years, so that the maintenance cost and the spare part loss cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a novel hydrogen chloride synthesis furnace, and is aimed at the technical field of hydrogen chloride synthesis. Background Art

[0002] The working principle of the hydrogen chloride synthesis furnace is that chlorine and hydrogen burn to form hydrogen chloride gas, which passes through the synthesis cylinder and the middle channel of the three-channel graphite heat exchange block in turn to reach the top of the synthesis furnace, then enters the longitudinal holes of the three-channel graphite heat exchange block for cooling, and is discharged from the hydrogen chloride gas outlet in the middle of the synthesis furnace.

[0003] When the hydrogen chloride synthesis furnace is running at full load, the upper graphite blocks are often eroded and corroded, resulting in the destruction of the independent channels of the gas phase and the water phase. The generated hydrogen chloride gas generates hydrochloric acid after contacting the circulating water, causing the following damages: flakes fall off the surface of the graphite blocks or the surface becomes rough; the surface is partially cracked and uneven; there are signs of erosion in some graphite pores; there is white scale in the first and second rows of the service holes, which is so serious that the service holes are blocked, and most of them are distributed in the cracked areas. If the equipment is damaged, it will cause the downstream equipment to stop production, the graphite blocks are expensive and the spare parts are seriously damaged, which will bring great economic losses in production and maintenance; once the synthesis furnace fails, the frequent load increase and decrease will have a certain irreversible impact on the life of the electrolytic cell of the front system. Once the electrolytic cell is improperly protected during operation, the service life of the electrolytic cell ion membrane and the cell body will be directly shortened. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a novel hydrogen chloride synthesis furnace, which solves the problems of the above-mentioned technology.

[0005] To achieve the purpose of the utility model, the utility model adopts the following technical scheme, including a first furnace body, a second furnace body, a third furnace body and a furnace bottom, wherein a combustion part is arranged inside the first furnace body; the lower end of the first furnace body is connected to the second furnace body, the third furnace body and the furnace bottom in sequence by bolts; a vortex device is arranged inside the upper end of the first furnace body; three baffles are arranged on the two side walls of the second furnace body respectively crossing each other; the third furnace body is provided with graphite blocks A, B, C, D, E and F from top to bottom;

[0006] A condensate inlet is provided on one side of the lower end of the second furnace body; a condensate outlet is provided on one side of the upper end of the third furnace body; the condensate inlet and the condensate outlet openings are connected by a U-shaped connecting elbow bolt; a cooling water inlet is provided on the left side of the bottom end of the third furnace body; the lower end of the third furnace body is connected to the furnace bottom; the furnace bottom and the two sides of the bottom of the third furnace body are respectively connected and fixed by bolt two; the upper end of each bolt two is connected and fixed with a spring b; a connecting pipe is provided at the opening of the furnace bottom; the upper port of the connecting pipe is docked and installed with the lower port of the graphite block F; the lower port of the connecting pipe is connected to the graphite chassis; a hydrogen chloride gas outlet is provided on one side of the upper end of the connecting pipe; a condensed acid outlet is provided on one side of the lower end of the connecting pipe.

[0007] Furthermore, a furnace top is provided at the upper end of the first furnace body; a chlorine inlet is provided at the middle position of the furnace top; a hydrogen inlet is provided at one side of the furnace top; the combustion part of the first furnace body includes a lamp holder; the top of the vortexer is fixed to the chlorine inlet end by a connecting pressure plate; a lamp holder is provided at the lower end of the vortexer; a cooling water outlet is provided on one side of the end of the second furnace body, and an ignition hole is provided on the other side; the ignition hole is used in conjunction with the lamp holder and the vortexer; the vortexer is made of high-aluminum ceramic.

[0008] Furthermore, bolts four are respectively provided on both sides of the furnace top; the bottom ends of the two bolts four are connected to the connecting pressure plate to fix the furnace top to the upper part of the connecting pressure plate.

[0009] Furthermore, fixing plates are respectively provided on both sides of the upper end of the second furnace body; a spring a is provided at the lower end of each fixing plate; screws are respectively passed through the two ends of the connecting pressure plate; each screw passes through the fixing plate to connect and fix the spring a.

[0010] Furthermore, the interior of the second furnace body is a high-pressure-resistant graphite cylinder; an interlayer is formed between the graphite cylinder and the second furnace body; the six baffles provided inside the second furnace body and the cylinder wall of the graphite cylinder transversely penetrate into the interlayer between the graphite cylinder and the second furnace body; each baffle has a hole with a hole diameter of Φ30mm; the connection between the second furnace body and the third furnace body is fixed by bolt one.

[0011] Furthermore, the graphite block A is cylindrical; three vertical plates are evenly spaced vertically in the middle of the graphite block A; three through holes are opened in the middle of each vertical plate; the graphite block A is made of GT-Kelite + statically pressed graphite impregnated with high-temperature carbon.

[0012] Furthermore, the graphite block B and the graphite block C are cylindrical; the upper top surface of the graphite block B is provided with a concave surface; the material of the graphite block B is GT-Carb+ultrafine particle isostatic graphite impregnated with high-temperature carbon; the bottom of the graphite block C is provided with a concave surface; the inside of the graphite block B and the graphite block C has a plurality of through holes evenly arranged longitudinally and transversely, and the opening diameter expansion of the graphite block B and the graphite block C is Φ20mm.

[0013] Furthermore, the graphite block D and the graphite block E are cylindrical; and a plurality of through holes are transversely arranged inside the graphite block D and the graphite block E.

[0014] Furthermore, the graphite block F is in an hourglass shape; a plurality of through holes are laterally arranged inside the upper end of the graphite block F.

[0015] Furthermore, the baffle, graphite block C, graphite block D, graphite block E and graphite block F are made of GT-Kelite + ultrafine particles isostatically impregnated phenolic

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The device firstly effectively improves the mixing of chlorine and hydrogen by adding a vortexer at the chlorine inlet at the upper end of the first furnace body, and secondly, effectively slows down the flow rate of hydrogen chloride gas by setting a baffle inside the second furnace body. Furthermore, the graphite block AF set in the third furnace body effectively avoids the scouring, corrosion and cracking of the graphite block by hydrogen chloride gas during operation. After increasing the thickness of the graphite block and expanding the hole, the cooling water is preheated from the third furnace body to the second furnace body and then to the first furnace body to fully exchange the cooling water. The heated cooling water reaches a certain temperature. Compared with the original graphite block structure in the third furnace body, one block is reduced, but the heat exchange can still meet the process requirements. The device as a whole effectively avoids the scouring, corrosion and cracking of graphite blocks; effectively improves the operation cycle of the equipment. After long-term monitoring by the design personnel, it is concluded that the operation cycle of the equipment has increased from the original 3 months to 1-2 years; the maintenance frequency is linearly reduced from once every 2 months to once every 2 years, reducing the maintenance cost and spare parts loss cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal gas flow of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the upper part of the utility model;

[0021] Figure 4 It is a partial structural schematic diagram of the baffle of the utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the third furnace body of the utility model;

[0023] Figure 6 It is a top plan view of the graphite block A of the utility model;

[0024] Figure 7 It is a cross-sectional schematic diagram of the graphite block A of the utility model;

[0025] Figure 8 It is a top plan view of graphite blocks B, C, D, E, and F of the utility model;

[0026] Fig. 9 It is a cross-sectional schematic diagram of the graphite block B of the utility model;

[0027] Fig.10 It is a cross-sectional schematic diagram of the graphite block C of the utility model;

[0028] Fig.11 It is a cross-sectional schematic diagram of graphite blocks D and E of the utility model;

[0029] Fig.12 It is a cross-sectional schematic diagram of the graphite block F of the utility model;

[0030] In the figure: 1-first furnace body; 2-second furnace body; 201-condensate inlet; 3-third furnace body; 301-condensate outlet; 4-furnace bottom; 5-graphite cylinder; 6-screw; 7-spring a; 8-cooling water outlet; 9-cooling water inlet; 10-connecting elbow; 11-chlorine inlet; 12-hydrogen inlet; 13-connecting pressure plate; 14-ignition hole; 15-bolt one; 16-spring b; 17-bolt two; 18-graphite block A; 19-graphite block B; 20-graphite block C; 21-graphite block D; 22-graphite block E; 23-graphite block F; 24-hydrogen chloride gas outlet; 25-lamp holder; 26-vortexer; 27-baffle; 28-condensate acid outlet; 29-graphite chassis; 30-furnace top; 31-bolt four; 32-connecting pipe. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention:

[0032] like Figure 1-12As shown, a novel hydrogen chloride synthesis furnace comprises a first furnace body 1, a second furnace body 2, a third furnace body 3 and a furnace bottom 4, wherein a combustion part is arranged inside the first furnace body 1; the lower end of the first furnace body 1 is connected to the second furnace body 2, the third furnace body 3 and the furnace bottom 4 in sequence by bolts; a vortexer 26 is arranged inside the upper end of the first furnace body 1, which effectively improves the mixing of chlorine and hydrogen; three baffles 27 are arranged on the two side walls of the second furnace body 2, which are cross-connected to each other, respectively, for slowing down the flow rate of hydrogen chloride gas; graphite blocks A18, B19, C20, D21, E22 and F23 are arranged in the third furnace body 3 from top to bottom, wherein the graphite blocks A18, B19 and C20 effectively prevent the hydrogen chloride gas from scouring, corroding and cracking the graphite blocks;

[0033] A condensate inlet 201 is provided at one side of the lower end of the second furnace body 2; a condensate outlet 301 is provided at one side of the upper end of the third furnace body 3; the condensate inlet 201 and the condensate outlet 301 are bolted together at their openings by a U-shaped connecting elbow 10, effectively forming a cooling water circulation channel; a cooling water inlet 9 is provided at the left side of the bottom end of the third furnace body 3; a furnace bottom 4 is connected to the lower end of the third furnace body 3; the furnace bottom 4 is connected and fixed to both sides of the bottom of the third furnace body 3 by bolts 17; the upper end of each bolt 17 is connected and fixed with a spring b16, It plays a role of buffering and reducing pressure; a connecting pipe 32 is provided at the opening of the furnace bottom 4; the upper end of the connecting pipe 32 is docked with the lower end of the graphite block F23; the lower end of the connecting pipe 32 is connected to the graphite chassis 29, and the cooling water is preheated from the lower section to the middle section and then to the upper section to fully exchange heat with the cooling water, and the heated cooling water reaches a certain temperature, and steam is generated through the flash evaporator outside the furnace, and this part of the steam can be used for other equipment; a hydrogen chloride gas outlet 24 is provided on one side of the upper end of the connecting pipe 32; a condensed acid outlet 28 is provided on one side of the lower end of the connecting pipe 32.

[0034] Specifically, the upper end of the first furnace body 1 is provided with a furnace top 30; a chlorine gas inlet 11 is provided in the middle of the furnace top 30; a hydrogen gas inlet 12 is provided on one side of the furnace top 30; the combustion part of the first furnace body 1 includes a lamp holder 25; the top of the vortex 26 is fixed to the end of the chlorine gas inlet 11 by a connecting pressure plate 13; the lower end of the vortex 26 is provided with a lamp holder 25; one side of the end of the second furnace body 2 is provided with a cooling water outlet 8, and the other side is provided with an ignition hole 14; the ignition hole 14 is used in conjunction with the lamp holder 25 and the vortex 26; the vortex 26 is made of high-aluminum ceramic. The vortex 26 is made of 4-6 blades in the circumferential direction of a hollow cylinder, the upper section of the blade is vertically in the same direction as the cylinder, and the lower section is offset at an angle of about 135° in the circumferential direction. The vortex 26 is made into a cone as a whole, which is convenient for installation and positioning, and a cover plate is used on the top of the vortex to fix it to the chlorine gas inlet end.

[0035] Specifically, bolts four 31 are respectively provided on both sides of the furnace top 30; the bottom ends of the two bolts four 31 are connected to the connecting pressure plate 13 to fix the furnace top 30 to the upper part of the connecting pressure plate 13.

[0036] Specifically, fixing plates are respectively provided on both sides of the upper end of the second furnace body 2; a spring a7 is provided at the lower end of each fixing plate; screws 6 are respectively passed through both ends of the connecting pressure plate 13; each screw 6 passes through the fixing plate to connect and fix the spring a7.

[0037] Specifically, the interior of the second furnace body 2 is a high-pressure-resistant graphite cylinder 5; an interlayer is formed between the graphite cylinder 5 and the second furnace body 2; the six baffles 27 provided inside the second furnace body 2 and the cylinder wall of the graphite cylinder 5 transversely penetrate into the interlayer between the graphite cylinder 5 and the second furnace body 2; each baffle 27 has a hole with a hole diameter of Φ30mm; the connection between the second furnace body 2 and the third furnace body 3 is connected and fixed by bolts 15.

[0038] Specifically, the graphite block A18 is cylindrical; three vertical plates are evenly spaced vertically in the middle of the graphite block A18; three through holes are opened in the middle of each vertical plate in the horizontal position; the graphite block A18 is made of GT-Kelite+statically pressed graphite impregnated with high-temperature carbon, and through holes are opened in the horizontal position of the vertical plate to allow cooling water to pass through the vertical plate, so that the jacket and heat exchange tube can cool the hydrogen chloride gas without affecting the flow rate of the cooling water. The graphite block A18 is set to a straight section as a buffer zone.

[0039] Specifically, the graphite block B19 and the graphite block C20 are cylindrical; the upper surface of the graphite block B19 is provided with a concave surface; the material of the graphite block B19 is GT-Carb+ ultrafine particle isostatic graphite impregnated with high temperature carbon, and the graphite block B19 is expanded, and the concave surface set on the top is to increase the cavity layer, and the service side on the left is deflected downward to provide more water side circulation space in the upper second furnace body 2; the bottom of the graphite block C20 is provided with a concave surface; the inside of the graphite block B19 and the graphite block C20 is evenly arranged with multiple through holes in the longitudinal and transverse directions, and the opening diameter of the graphite block B19 and the graphite block C20 is Φ 20mm, after the hole expansion treatment, the oxygen content in the chlorine and the water content in the hydrogen are greater than those in the conventional synthesis furnace. The hole expansion treatment is also due to the fact that moisture can easily cause damage to the lamp holder and imported graphite parts. In order to avoid this situation, the aperture is enlarged, the process side is designed with large holes, the wall thickness between the holes is appropriately increased, the strength between the process holes is improved, and the gas velocity on the process side is reduced. The graphite block C20 realizes the redistribution of the hydrogen chloride gas and plays the role of a distributor. In order to avoid scale clogging the cooling water holes, the longitudinal and transverse opening diameters of the graphite blocks B19 and C20 are expanded compared to the graphite blocks D21, E22, and F23.

[0040] Specifically, the graphite block D21 and the graphite block E22 are cylindrical; a plurality of through holes are transversely arranged inside the graphite block D21 and the graphite block E22.

[0041] Specifically, the graphite block F23 is hourglass-shaped; a plurality of through holes are transversely arranged inside the upper end of the graphite block F23 to facilitate the gathering of hydrogen chloride gas and flow into the next stage.

[0042] Specifically, the baffle 27, graphite block C20, graphite block D21, graphite block E22 and graphite block F23 are made of GT-Kelite+ultrafine particles isostatically impregnated phenolic resin.

[0043] In specific implementation, the synthesis furnace is composed of a first furnace body 1, a second furnace body 2 and a third furnace body 3. Chlorine is input through a chlorine inlet 11, and hydrogen is input through a hydrogen inlet 12. The mixed gas flows into the second furnace body 2 and the third furnace body 3 through a vortexer 26 on the combustion part in the first furnace body 1. The mixed gas is used to slow down the flow rate of the hydrogen chloride gas through a baffle 27 in the second furnace body 2. The mixed gas fills the entire synthesis furnace, and then cooling water is injected into the cooling water inlet 9. The cooling water passes through the through holes in the graphite blocks A18, B19, C20, D21, E22 and F23 in turn, and the jacket and the heat exchange tube cool the hydrogen chloride gas without affecting the flow rate of the cooling water, so as to play the role of a distributor. In order to avoid scale clogging the cooling water hole, the longitudinal and transverse opening diameters of the graphite blocks B19 and C20 are expanded compared with the graphite blocks D21, E22 and F23. Then, a cooling water circulation channel is effectively formed through the connecting elbow 10 between the second furnace body 2 and the third furnace body 1. After synthesis, the cooling water is discharged from the cooling water outlet 8 on the first furnace body 1, and the cooling water is fully heat-exchanged in the combustion part. The heated cooling water reaches a certain temperature and generates steam through the flash evaporator outside the furnace. This part of steam can be used for other equipment, and the synthesized hydrogen chloride gas is output from the hydrogen chloride gas outlet 24.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention based on the technical solution and improved concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel hydrogen chloride synthesis furnace, comprising a first furnace body (1), a second furnace body (2), a third furnace body (3) and a furnace bottom (4), characterized in that: A combustion unit is provided inside the first furnace body (1); the lower end of the first furnace body (1) is connected to the second furnace body (2), the third furnace body (3) and the furnace bottom (4) in sequence by bolts; a vortexer (26) is provided inside the upper end of the first furnace body (1); three baffles (27) are provided on the two side walls of the second furnace body (2) so as to intersect with each other; and a graphite block A (18), a graphite block B (19), a graphite block C (20), a graphite block D (21), a graphite block E (22) and a graphite block F (23) are provided inside the third furnace body (3) from top to bottom; A condensate inlet (201) is provided at one side of the lower end of the second furnace body (2); a condensate outlet (301) is provided at one side of the upper end of the third furnace body (3); the condensate inlet (201) and the condensate outlet (301) are bolted together at their openings via a U-shaped connecting elbow (10); a cooling water inlet (9) is provided at the left side of the bottom end of the third furnace body (3); the furnace bottom (4) and the bottom of the third furnace body (3) are respectively connected and fixed by bolts (17) on both sides; the upper ends of the bolts (17) on both sides are fixedly connected with springs b (16); a connecting pipe (32) is provided at the opening of the furnace bottom (4); the upper end of the connecting pipe (32) is docked and installed with the lower end of the graphite block F (23); the lower end of the connecting pipe (32) is connected to a graphite chassis (29); a hydrogen chloride gas outlet (24) is provided at one side of the upper end of the connecting pipe (32); and a condensed acid outlet (28) is provided at one side of the lower end of the connecting pipe (32).

2. A novel hydrogen chloride synthesis furnace according to claim 1, characterized in that: A furnace top (30) is provided at the upper end of the first furnace body (1); a chlorine gas inlet (11) is provided in the middle of the furnace top (30); a hydrogen gas inlet (12) is provided on one side of the furnace top (30); the combustion part of the first furnace body (1) includes a lamp holder (25); the top of the vortex generator (26) is fixed to the end of the chlorine gas inlet (11) by a connecting pressure plate (13); a lamp holder (25) is provided at the lower end of the vortex generator (26); a cooling water outlet (8) is provided on one side of the end of the second furnace body (2), and an ignition hole (14) is provided on the other side; the ignition hole (14) is used in conjunction with the lamp holder (25) and the vortex generator (26); the vortex generator (26) is made of high-aluminum ceramic.

3. A novel hydrogen chloride synthesis furnace according to claim 2, characterized in that: Bolts four (31) are respectively provided on both sides of the furnace top (30); the bottom ends of the two bolts four (31) are connected to the connecting pressure plate (13) to fix the furnace top (30) to the upper part of the connecting pressure plate (13).

4. A novel hydrogen chloride synthesis furnace according to claim 3, characterized in that: Fixed plates are respectively provided on both sides of the upper end of the second furnace body (2); a spring a (7) is provided at the lower end of each fixed plate; screw rods (6) are respectively passed through the two ends of the connecting pressure plate (13); each screw rod (6) passes through the fixed plate and is connected to the fixed spring a (7).

5. A novel hydrogen chloride synthesis furnace according to claim 4, characterized in that: The interior of the second furnace body (2) is a graphite cylinder (5) with high pressure resistance; an interlayer is formed between the graphite cylinder (5) and the second furnace body (2); six baffles (27) provided inside the second furnace body (2) and the cylinder wall of the graphite cylinder (5) penetrate transversely into the interlayer between the graphite cylinder (5) and the second furnace body (2); each baffle (27) has a hole with a hole diameter of Φ30 mm; the connection between the second furnace body (2) and the third furnace body (3) is connected and fixed by bolts (15).

6. A novel hydrogen chloride synthesis furnace according to claim 1, characterized in that: The graphite block A (18) is cylindrical; three vertical plates are evenly spaced vertically arranged in the middle of the graphite block A (18); and three through holes are opened in the middle of each vertical plate in a horizontal position.

7. A novel hydrogen chloride synthesis furnace according to claim 1, characterized in that: The graphite block B (19) and the graphite block C (20) are cylindrical; the upper surface of the graphite block B (19) is provided with a concave surface; the bottom of the graphite block C (20) is provided with a concave surface; the inside of the graphite block B (19) and the graphite block C (20) is uniformly arranged with a plurality of through holes in the longitudinal and transverse directions, and the opening diameter of the graphite block B (19) and the graphite block C (20) is Φ20 mm.

8. A novel hydrogen chloride synthesis furnace according to claim 1, characterized in that: The graphite block D (21) and the graphite block E (22) are cylindrical in shape; a plurality of through holes are transversely arranged inside the graphite block D (21) and the graphite block E (22).

9. A novel hydrogen chloride synthesis furnace according to claim 1, characterized in that: The graphite block F (23) is in an hourglass shape; a plurality of through holes are transversely arranged inside the upper end of the graphite block F (23).

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