Absorbent production device for a desulfurization system of a graphitization furnace

Abstract

The utility model discloses a kind of absorbent production devices of graphitization furnace desulfurization system, including slurry tank, slurry tank top is provided with drain pipeline, water adding interface, overhaul opening, observation window is provided on the side wall of slurry tank, slurry tank top is provided with spiral weighing feeder, the discharge port of spiral weighing feeder is connected with the feed inlet of slurry tank by discharging pipe, calcium oxide powder bin is provided above spiral weighing feeder, the top of calcium oxide powder bin is provided with dust discharging port, side wall is provided with feeding port, calcium oxide powder bin is supported and fixed by the support of slurry tank 1 top, the feed inlet of the discharge pipe of calcium oxide powder bin and spiral weighing feeder is connected by connecting pipe. The utility model can effectively solve that powder bin is easy to bridge block, good in continuousness of discharging, slurry production efficiency is high, dust cannot overflow and pollute environment, slurry concentration is conveniently configured.

Description

Technical Field

[0001] This utility model relates to the field of graphitization furnace desulfurization technology, and in particular to an absorbent production device for a graphitization furnace desulfurization system. Background Technology

[0002] The exhaust gas from graphitization furnaces contains large amounts of particulate matter, sulfur dioxide, and volatile organic compounds, which pose a threat to the atmospheric environment and human health. Therefore, upgrading and transforming the exhaust gas treatment system of graphitization furnaces to reduce pollutant emissions is an urgent need to protect the ecological environment and fulfill social responsibility.

[0003] Currently, the graphitization furnace process generates high-concentration sulfur dioxide flue gas, which requires treatment using a wet desulfurization process. Traditional absorbent (calcium oxide slurry) preparation suffers from the following problems: powder silos are prone to bridging and clogging, resulting in discontinuous feeding; dust spillage pollutes the environment; and slurry concentration is difficult to adjust. Utility Model Content

[0004] This invention provides an absorbent production device for a graphitization furnace desulfurization system, which solves the problems of easy bridging and blockage of powder silos, discontinuous feeding, dust overflow and environmental pollution, and difficulty in slurry concentration preparation in the traditional graphitization furnace desulfurization system absorbent preparation process.

[0005] This utility model provides an absorbent production device for a graphitization furnace desulfurization system, including a slurry tank. The top of the slurry tank is equipped with a drain pipe, a water inlet, and an inspection port. An observation window is provided on the side wall of the slurry tank. A screw weighing feeder is installed on the top of the slurry tank. The discharge port of the screw weighing feeder is connected to the inlet of the slurry tank via a discharge pipe. A calcium oxide powder silo is installed above the screw weighing feeder. The top of the calcium oxide powder silo is equipped with a dust discharge port, and the side wall is equipped with a feeding port. The calcium oxide powder silo is supported and fixed by a bracket installed on the top of the slurry tank. The discharge pipe of the calcium oxide powder silo is connected to the inlet of the screw weighing feeder via a connecting pipe. Three or more scrapers are arranged circumferentially on the inner side wall of the dust discharge pipe.

[0006] In the above technical solution, preferably, the feeding pipe and the connecting pipe are both flexible hoses.

[0007] In the above technical solution, preferably, the lower part of the calcium oxide powder silo is an inverted conical sidewall, and multiple pneumatic vibrators are arranged on the side of the conical sidewall.

[0008] In the above technical solution, preferably, the dust discharge port is connected to a dust discharge pipe, an installation plate is provided inside the dust discharge pipe, an installation hole is provided in the middle of the installation plate, a filter cylinder is provided at the bottom of the installation plate, a flange is provided on the upper outer wall of the filter cylinder, the upper end of the filter cylinder is fitted inside the installation hole and supported and fixed to the installation plate by the flange, and a dust removal bag is fitted on the outer wall of the filter cylinder.

[0009] In the above technical solution, preferably, a discharge valve is provided on the discharge pipe.

[0010] In the above technical solution, preferably, a stirring mechanism is provided on the top of the slurry tank.

[0011] In the above technical solution, preferably, an ultrasonic level gauge is installed on the top of the slurry tank.

[0012] As can be seen from the above technical solutions, this utility model provides an absorbent production device for a graphitization furnace desulfurization system.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Water is injected into the slurry tank to the set level through the water inlet. The level is monitored by an ultrasonic level gauge. Calcium oxide powder is fed into the slurry tank through the calcium oxide powder silo. After being broken up by a vibrator, the powder is fed into the screw weighing feeder in controlled quantity by the discharge valve. The feeding is continuous and the powder is accurately metered and fed into the slurry tank through the discharge pipe. At the same time, the stirring mechanism is started to mix, which can realize the rapid production of absorbent. The preparation time of slurry in a single tank is shortened, and the number of shutdowns of the desulfurization system due to unqualified absorbent is reduced. The annual calcium oxide waste is greatly reduced, and the slurry preparation is more convenient.

[0015] 2. Dust from the top of the calcium oxide powder silo is drawn into the filter cartridge by negative pressure for filtration. The filtered gas is then sent to a pulse bag filter for further dust removal, preventing dust pollution in the production area. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the absorbent production device for a graphitization furnace desulfurization system proposed in this utility model.

[0018] Figure 2 This is a partial structural schematic diagram of an absorbent production device for a graphitization furnace desulfurization system proposed in this utility model.

[0019] Figure 3This is a schematic diagram of the internal structure of the dust discharge pipe of the absorbent production device in the graphitization furnace desulfurization system proposed in this utility model.

[0020] In the picture:

[0021] 1-Slurry tank; 11-Drainage pipe; 12-Water inlet; 13-Inspection port; 14-Observation window; 15-Ultrasonic level gauge; 2-Screw weighing feeder; 3-Discharge pipe; 4-Calcium oxide powder silo; 41-Dust outlet; 42-Feeding port; 43-Discharge pipe; 44-Unloading valve; 5-Bracket; 6-Connecting pipe; 7-Pneumatic vibrator; 8-Dust outlet pipe; 81-Mounting plate; 82-Mounting hole; 83-Filter cartridge; 84-Flange; 85-Dust collector bag; 9-Agitator. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] Problem: Existing calcium oxide powder silos using airflow generate significant dust, which is prone to leakage and environmental pollution. Calcium oxide powder supply is also prone to blockage.

[0024] Example 1:

[0025] Please see Figure 1-3 An absorbent production device for a graphitization furnace desulfurization system includes a slurry tank 1 for mixing calcium oxide and water. The top of the slurry tank 1 is sequentially equipped with a drain pipe 11, a water inlet 12, and an inspection port 13. An observation window 14 is provided on the side wall of the slurry tank 1. A screw weighing feeder 2 is installed on the top of the slurry tank 1. The discharge port of the screw weighing feeder 2 is connected to the inlet of the slurry tank 1 via a discharge pipe 3. A calcium oxide powder silo 4 is installed above the screw weighing feeder 2. The top of the calcium oxide powder silo 4 is equipped with a dust discharge port 41, and a feeding port 42 is provided on the side wall. The calcium oxide powder silo 4 is supported by a bracket 5 installed on the top of the slurry tank 1. The discharge pipe 43 of the calcium oxide powder silo 4 is connected to the inlet of the screw weighing feeder 2 via a connecting pipe 6. The calcium oxide powder silo 4 is used to store calcium oxide powder. The calcium oxide powder silo 4 is fed into the feed port 42 via a screw conveyor. The material is introduced into the screw weighing feeder 2 through the discharge pipe 43 and the connecting pipe 6 for weighing and conveying. The metered material is added into the slurry tank 1 through the discharge pipe 3 set at the discharge port of the screw weighing feeder 2. Water is added through the water inlet 12 to mix with the calcium oxide powder in the slurry tank 1 to form an absorbent slurry. The feeding process has good continuity and high slurry production efficiency.

[0026] Preferably, the feed pipe 3 and the connecting pipe 6 are both flexible hoses, which are fixedly connected to the outer sleeve of the connected pipe by clamps. The feed pipe 3 and the connecting pipe 6 are made of corrugated rubber hoses with elasticity to prevent the screw weighing feeder 2 from being affected during the weighing process.

[0027] See Figure 1 , 2 Preferably, the lower part of the calcium oxide powder silo 4 is a 60° inverted conical sidewall, and three pneumatic vibrators 7, model K10T ball vibrators, are installed on the side of the conical sidewall, which pulse vibrate for 10 seconds every 2 minutes to prevent bridging.

[0028] See Figure 2 , 3 Specifically, the dust outlet 41 is connected to the dust discharge pipe 8. An installation plate 81 is installed inside the dust discharge pipe 8. The installation plate 81 is fixedly connected to the inner wall of the dust discharge pipe 8 on all four sides. An installation hole 82 is provided in the middle of the installation plate 81. A filter cylinder 83 is installed at the bottom of the installation plate 81. A flange 84 is installed on the outer wall of the upper end of the filter cylinder 83. The upper end of the filter cylinder 83 is fitted into the installation hole 82 and supported and fixed to the installation plate 81 by the flange 84. An annular rubber gasket is provided between the bottom of the flange 84 and the installation plate 81, and the flange 84 is secured to the installation plate 81 by screws. Mounting plates 81 are fixed together. A dust collector bag 85 is fitted on the outer wall of the filter cylinder 83. The upper end of the dust collector bag 85 is fixed to the side wall of the filter cylinder 83 by clamps. Filter holes are arranged in an array on the side wall of the filter cylinder 83 so that the dust is trapped in the dust discharge pipe 8 and falls back to the calcium oxide powder silo 4 by the filtration effect of the external dust collector bag 85. The filtered gas passes through the filter cylinder 83 and the dust collector bag 85 and enters the pulse dust collector for further dust removal to prevent environmental pollution.

[0029] Preferably, the high-temperature resistant dust collector bag 85 is made of PTFE membrane filter material with a precision of 0.1μm; the upper end of the dust discharge port 41 is connected to a negative pressure suction pipe, which is connected to an external pulse dust collector to filter the dust.

[0030] See Figure 1 Preferably, a drain pipe 11 is provided at the top of the slurry tank 1. The lower end of the drain pipe 11 is inserted into the interior of the slurry tank 1, and the upper end is fixedly connected to the top plate of the slurry tank 1. The upper end of the drain pipe 11 is connected to a self-priming pump through a drain pipe to draw out the slurry in the slurry tank 1 for use in the desulfurization tower. The water inlet 12 is connected to a water pump through a water pipe, and the water pump is connected to a water tank through a pipe. An electric valve is connected to the water pipe to control the water supply to the water tank. The inspection port 13 is equipped with a sealing cover to facilitate the inspection of the internal structure of the slurry tank 1.

[0031] See Figure 1 Preferably, a tempered glass observation window 14 is installed on the side wall of the slurry tank 1, which can be used to visually observe the state of the slurry.

[0032] See Figure 1 Preferably, an ultrasonic level gauge 15 is fixed on the top of the tank to monitor the liquid level in real time and feed it back to the PLC control system.

[0033] See Figure 1 Preferably, the slurry tank 1 is equipped with a stirring structure 9 inside. The stirring structure 9 includes a stirring shaft and stirring blades. The stirring shaft is rotatably connected to the shaft seat at the top of the slurry tank 1. The stirring blades are installed on the stirring shaft. A motor seat is set at the top of the slurry tank 1. The motor output shaft on the motor seat is connected to the upper end of the stirring shaft through a coupling. The motor can drive the stirring shaft to rotate and drive the stirring blades to stir the material in the slurry tank 1. The stirring blades are double-layered blades with a rotation speed of 30-60 rpm to prevent calcium oxide precipitation.

[0034] See Figure 1 , 2 Preferably, a star-shaped discharge valve 44 is provided on the discharge pipe 43 to achieve sealed rotary feeding and prevent dust leakage.

[0035] Specifically, the screw weighing feeder 2 is a commercially available device, model LCS-L-500, with an accuracy of ±0.5%. It is fixed to the top of the slurry tank 1 via a base. The screw weighing feeder 2 receives PLC instructions and feeds powder into the tank at a set flow rate (50-200kg / h).

[0036] See Figure 1 , 2 Specifically, the feed inlet is connected to the discharge pipe 43 of the silo via a flexible rubber connecting pipe 6 (pressure resistant 0.6MPa). The end of the connecting pipe 6 is sleeved on the outer wall of the end of the discharge pipe 43 and the two are fixed together by clamps.

[0037] As can be seen from the above technical solutions, the working principle of this utility model is as follows:

[0038] 1. Water is injected into the slurry tank through the water inlet 12 to the set level, and the level is monitored by the ultrasonic level gauge 15;

[0039] 2. After the calcium oxide powder is broken up by the vibrator 7, it is fed into the screw weighing feeder 2 by the unloading valve 44 in controlled quantity;

[0040] 3. After the powder is accurately metered, it is fed into the slurry tank through the feed pipe 3, and at the same time the stirring mechanism 9 is started to mix;

[0041] 4. The dust at the top of the calcium oxide powder silo 4 is drawn into the filter cartridge 83 by negative pressure for filtration, and the filtered gas is sent to the pulse bag dust collector for further dust removal.

[0042] 5. The prepared slurry is pumped into the desulfurization tower through the drainage pipe 11.

[0043] The present invention will achieve the following technical effects:

[0044] (1) The screw weighing feeder has an accuracy of 2±0.5%, combined with the ultrasonic level gauge 15 feedback, the slurry concentration error is ≤3%, which significantly improves the desulfurization efficiency (the measured SO removal rate is stable >98%).

[0045] (2) Flexible rubber tube sealing connection, rotary filter dust removal (filtration efficiency 99.9%), dust concentration in the work area <1mg / m³ (national standard requires ≤4mg / m³).

[0046] (3) By using a conical silo and a pneumatic vibrator to solve the problem of powder bridging, the failure rate during continuous operation is reduced by 90%.

[0047] Continuous operation testing of this invention in a graphitization workshop for anode materials shows that:

[0048] The efficiency of absorbent preparation has been improved by 40%, and the preparation time of a single tank of slurry (10m³) has been shortened from 2.5h to 1.5h; the number of shutdowns of the desulfurization system due to unqualified absorbents has been reduced from an average of 6 times per month to 0 times; and the waste of calcium oxide has been reduced by about 80 tons per year, saving 160,000 yuan in raw material costs.

[0049] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0050] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. An absorbent production device for a graphitization furnace desulfurization system, characterized in that: The system includes a slurry tank (1), a drain pipe (11), a water inlet (12), and an inspection port (13) on the top of the slurry tank (1). An observation window (14) is provided on the side wall of the slurry tank (1). A screw weighing feeder (2) is provided on the top of the slurry tank (1). The discharge port of the screw weighing feeder (2) is connected to the inlet of the slurry tank (1) through a discharge pipe (3). A calcium oxide powder silo (4) is provided above the screw weighing feeder (2). A dust discharge port (41) is provided on the top of the calcium oxide powder silo (4), and a feeding port (42) is provided on the side wall. The calcium oxide powder silo (4) is supported and fixed by a bracket (5) provided on the top of the slurry tank (1). The discharge pipe (43) of the calcium oxide powder silo (4) is connected to the inlet of the screw weighing feeder (2) through a connecting pipe (6).

2. The absorbent production device for a graphitization furnace desulfurization system according to claim 1, characterized in that, Both the feeding pipe (3) and the connecting pipe (6) are flexible hoses.

3. The absorbent production device for a graphitization furnace desulfurization system according to claim 1, characterized in that, The lower part of the calcium oxide powder silo (4) is an inverted conical sidewall, and multiple pneumatic vibrators (7) are installed on the side of the conical sidewall.

4. The absorbent production device for a graphitization furnace desulfurization system according to claim 1, characterized in that, The dust discharge port (41) is connected to the dust discharge pipe (8). An installation plate (81) is installed inside the dust discharge pipe (8). An installation hole (82) is provided in the middle of the installation plate (81). A filter cylinder (83) is provided at the bottom of the installation plate (81). A flange (84) is provided on the outer wall of the upper end of the filter cylinder (83). The upper end of the filter cylinder (83) is fitted inside the installation hole (82) and supported and fixed to the installation plate (81) by the flange (84). A dust removal bag (85) is fitted on the outer wall of the filter cylinder (83).

5. The absorbent production device for a graphitization furnace desulfurization system according to claim 1, characterized in that, A discharge valve (44) is installed on the discharge pipe (43).

6. The absorbent production device for a graphitization furnace desulfurization system according to claim 1, characterized in that, A stirring mechanism (9) is provided on the top of the slurry tank (1).

7. The absorbent production device for a graphitization furnace desulfurization system according to claim 1, characterized in that, An ultrasonic level gauge (15) is installed on the top of the slurry tank (1).

Images