Waste gas treatment system for roller screen of rod mill

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a waste gas treatment system for a roller screen of a rod mill. The device comprises a water tank, a cavity, located above a water solution, in the water tank is divided into an exhaust cavity and an air inlet condensation cavity through a partition plate, the exhaust cavity is provided with an exhaust pipe communicated with the atmosphere, the air inlet condensation cavity is communicated with a waste gas exhaust pipe of the rod mill, and a condensation assembly used for condensing waste gas is arranged in the air inlet condensation cavity. The condensation end of the condensation assembly extends into the water solution; the exhaust end and the air inlet end of the air guide pipeline are respectively inserted into the water solution below the exhaust cavity and the air inlet condensation cavity. The waste gas treatment device has the advantages that the waste gas treatment effect is good, and the storage stability of dissolved waste gas is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of waste gas treatment, specifically is rod mill drum screen waste gas treatment system. BACKGROUND

[0002] The rod mill is the main equipment for producing coal water slurry: the coal sent by the coal conveying system is mixed with wastewater and additives in each section according to a certain proportion and then sent into the rod mill to be ground into qualified coal water slurry and sent to the gasification furnace for reaction.

[0003] Part of the wastewater used as raw material for producing coal water slurry is generated in the synthetic ammonia production process. The part of wastewater will precipitate toxic and harmful gases containing H2S and NH3 at the tail drum screen of the rod mill. Since the above-mentioned waste gas has the characteristic of being soluble in water, the existing technology directly uses aqueous solution to treat the waste gas. For example, the text of the patent with the name of a coal gasification rod mill vent gas spraying device disclosed in CN216987926U is connected with a spraying water pipeline on the vent gas pipeline on the drum screen of the rod mill to reduce the waste gas temperature and absorb the waste gas.

[0004] However, in actual implementation, the spraying and absorbing waste gas mode recorded in the cited patent has the problem of insufficient waste gas treatment effect due to insufficient uniformity of spraying coverage. Of course, in actual implementation, there is also a way of treating waste gas by using a water tank to wash gas, but since the dissolution of waste gas in water is not an instantaneous process, when the water absorption amount of the aqueous solution in the water tank is too large or the waste gas emission speed is too fast, the problem of waste gas not being dissolved before being discharged also exists. In addition, since the discharged waste gas has a high temperature, when the waste gas is continuously discharged into the water tank, the water temperature in the water tank will also rise, and the ammonia water formed by the dissolution of NH3 in water is easy to decompose into NH3 and water when heated, ultimately leading to the discharge of NH3 into the atmosphere, and the problem of insufficient stability of the dissolved waste gas storage. Therefore, it is urgent to solve. UTILITY MODEL CONTENT

[0005] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a rod mill drum screen waste gas treatment system, which has good waste gas treatment effect and strong storage stability of dissolved waste gas.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The rod mill roller screen waste gas treatment system comprises a water tank, a chamber above a water solution in the water tank is divided into an exhaust chamber and an air inlet condensing chamber by a partition plate, the exhaust chamber is provided with an exhaust pipe in communication with the atmosphere, the air inlet condensing chamber is in communication with a waste gas exhaust pipe of a rod mill, a condensing assembly for condensing waste gas is arranged in the air inlet condensing chamber, and a condensing end of the condensing assembly extends to the inside of the water solution; and the rod mill roller screen waste gas treatment system further comprises a gas guide pipeline for guiding gas, an exhaust end and an air inlet end of the gas guide pipeline are respectively inserted into the water solution below the exhaust chamber and the air inlet condensing chamber.

[0008] As a further scheme of the utility model, the condensing assembly comprises a condensing rod vertically arranged in the air inlet condensing chamber, the upper end of the condensing rod penetrates through the water tank and is connected with a condenser, and the lower end of the condensing rod extends to the inside of the water solution.

[0009] As a further scheme of the utility model, in a top view, the condensing rod is arranged in a dot matrix mode.

[0010] As a further scheme of the utility model, the gas guide pipeline comprises a fan, an air inlet pipe and an air outlet pipe connected to the input end and the output end of the fan respectively, the free end of the air inlet pipe is in communication with the air inlet condensing chamber, and the free end of the air inlet pipe constitutes the exhaust end of the gas guide pipeline; the free end of the air outlet pipe is inserted into the water solution below the exhaust chamber, and the free end of the air outlet pipe constitutes the exhaust end of the gas guide pipeline.

[0011] As a further scheme of the utility model, an impeller for stirring the water solution is mounted in the water tank.

[0012] As a further scheme of the utility model, the impeller is arranged at the exhaust end of the gas guide pipeline.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The waste gas exhaust pipe of the rod mill discharges gas into the air inlet condensing chamber, the gas is cooled and condensed by the condensing assembly, and the condensed liquid formed by condensation and the water solution below the air inlet condensing chamber preliminarily absorb part of the waste gas; thereafter, the gas cooled and condensed in the air inlet condensing chamber enters the water solution below the exhaust chamber through the gas guide pipeline, and the water solution below the exhaust chamber again absorbs the harmful gas in the gas, completing secondary absorption of the waste gas and improving the treatment effect of the harmful gas in the waste gas.

[0015] 2、The condensing assembly adopts the condensing rod arranged vertically in the air inlet condensing cavity, which can condense the gas flowing in the air inlet condensing cavity. In addition, since the water solution below the air exhaust cavity and the air inlet condensing cavity are communicated with each other, the lower end of the condensing rod is inserted into the water solution in the air inlet condensing cavity, that is, the water solution in the air exhaust cavity and the air inlet condensing cavity is cooled, which not only has a simple structure, but also guarantees the cooling effect of the air inlet condensing cavity and the water solution.

[0016] 3、In the top view, the condensing rod is arranged in the form of a dot matrix, which increases the coverage of the condensing rod and further improves the cooling effect of the air inlet condensing cavity and the water solution.

[0017] 4、The fan is arranged on the air guide pipeline, so that the gas is cooled before entering the fan, which can effectively prevent the fan from overheating due to continuous suction of high-temperature gas, and guarantees the stability of the fan operation.

[0018] 5、The water solution is provided with an impeller, so that the water solution below the air exhaust cavity and the air inlet condensing cavity can be better mixed, so that the temperature distribution of the water solution is uniform, and the volatilization of harmful substances caused by local overheating of the water solution is reduced.

[0019] 6、The impeller is arranged at the air exhaust end of the air guide pipeline, so that the impeller can not only stir the water solution, but also disturb the air discharged from the air guide pipeline, so that the air discharged from the air guide pipeline can be better absorbed by the water solution. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The structure of the utility model is shown in the figure.

[0021] In the figure: 10, water tank; 11, air exhaust cavity; 12, air inlet condensing cavity; 13, partition; 20, water solution; 30, condensing rod; 40, condenser; 50, air exhaust pipe; 60, waste gas exhaust pipe; 70, fan; 71, air inlet pipe; 72, air outlet pipe; 80, rod mill; 90, impeller. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0023] For the convenience of understanding, the specific structure and working mode of the utility model are further described below in combination with the drawings:

[0024] The specific structure of the utility model is referred to Figure 1As shown, the main structure thereof includes the water tank 10 connected with the exhaust gas discharge pipe 60 of the rod mill 80. Among them, the chamber above the water solution 20 in the water tank 10 is separated into the exhaust gas chamber 11 and the intake condensing chamber 12 by the partition plate 13, so that the exhaust gas chamber 11 and the intake condensing chamber 12 on both sides of the partition plate 13 cannot communicate with each other, but the water solution 20 below them can communicate with each other. The exhaust gas chamber 11 is provided with the exhaust pipe 50 in communication with the atmosphere, the intake condensing chamber 12 is in communication with the exhaust gas discharge pipe 60 of the rod mill 80, the condensing assembly for condensing the exhaust gas is arranged in the intake condensing chamber 12, and the condensing end of the condensing assembly extends to the inside of the water solution 20; and further comprising the gas guide pipeline for guiding the gas, the exhaust end and the intake end of the gas guide pipeline are respectively inserted into the water solution 20 below the exhaust gas chamber 11 and the intake condensing chamber 12. In use, the exhaust gas discharge pipe 60 of the rod mill 80 discharges the gas into the intake condensing chamber 12, the gas is cooled and condensed by the condensing assembly, and the condensed liquid formed by condensation and the water solution 20 below the intake condensing chamber 12 preliminarily absorb part of the exhaust gas; thereafter, the gas cooled and condensed in the intake condensing chamber 12 enters the water solution 20 below the exhaust gas chamber 11 through the gas guide pipeline, and the harmful gas in the gas is again absorbed by the water solution 20 below the exhaust gas chamber 11, completing the secondary absorption of the exhaust gas and improving the treatment effect of the harmful gas in the exhaust gas. In addition, since the condensing end of the condensing assembly extends to the inside of the water solution 20, the harmful substances absorbed in the water solution 20 can be effectively prevented from volatilizing again due to high temperature, and the stability of the preservation of the dissolved harmful substances is improved.

[0025] Specifically, as shown in the figure, Figure 1 The condensing assembly includes the condensing rod 30 vertically arranged in the intake condensing chamber 12, the upper end of the condensing rod 30 penetrates the water tank 10 and is connected with the condenser 40, and the lower end of the condensing rod 30 extends to the inside of the water solution 20. The condensing rod 30 can be in the form of a solid metal, a solid glass rod or a hollow metal with a cooling liquid arranged inside, which can transmit the cold energy generated by the condenser 40. By vertically arranging the condensing rod 30, the gas flowing in the intake condensing chamber 12 can be cooled and condensed; and since the water solutions 20 below the exhaust gas chamber 11 and the intake condensing chamber 12 communicate with each other, the lower end of the condensing rod 30 is inserted into the water solution 20 in the intake condensing chamber 12, which realizes the cooling of the water solutions 20 in the exhaust gas chamber 11 and the intake condensing chamber 12, ensuring the cooling effect of the intake condensing chamber 12 and the water solution 20.

[0026] Further, in the top view, the condensing rod 30 is arranged in the form of a dot matrix, which increases the coverage range of the condensing rod 30 and further improves the cooling effect of the intake condensing chamber 12 and the water solution 20.

[0027] On the basis of the above, as shown in the figure, Figure 1As shown, the air guide pipeline comprises a fan 70 and an air inlet pipe 71 and an air outlet pipe 72 connected to the input end and the output end of the fan 70 respectively, the free end of the air inlet pipe 71 is communicated with the air condensing cavity 12 and constitutes the air outlet end of the air guide pipeline, the free end of the air outlet pipe 72 is inserted into the water solution 20 below the air outlet cavity 11 and constitutes the air outlet end of the air guide pipeline. The fan 70 generates negative pressure, the gas in the air condensing cavity 12 which is condensed and has harmful substances is adsorbed by the air inlet pipe 71 of the input end of the fan 70, and the gas is discharged into the water solution 20 below the air outlet cavity 11 by the air outlet pipe 72 of the output end of the fan 70 for secondary absorption of harmful substances. Since the gas is cooled before entering the fan 70, the continuous suction of high-temperature gas into the fan 70 can be effectively prevented, and the stability of the fan 70 operation is ensured.

[0028] On the basis of the above, Figure 1 As shown, the water tank 10 is internally provided with an impeller 90 for agitating the water solution 20, the impeller 90 is arranged so that the water solution 20 below the air outlet cavity 11 and the air condensing cavity 12 can be better mixed, the temperature distribution of the water solution 20 is uniform, and the volatilization of harmful substances caused by local overheating of the water solution 20 is reduced.

[0029] Further, the impeller 90 is arranged at the air outlet end of the air guide pipeline, so that the impeller 90 can not only agitate the water solution 20, but also disturb the flow of the gas discharged by the air guide pipeline, so that the gas discharged by the air guide pipeline can be better absorbed by the water solution 20.

[0030] It is worth mentioning that in the embodiment in which the impeller 90 is arranged at the air outlet end of the air guide pipeline, if the kinetic energy of the gas discharged by the air outlet end of the air guide pipeline is sufficient to drive the impeller 90 to rotate, the motor for driving the impeller 90 to rotate can not be provided in the utility model, but can be driven by the kinetic energy generated by the gas discharged by the air outlet end of the air guide pipeline.

[0031] Of course, for those skilled in the art, the utility model is not limited to the details of the above-mentioned exemplary embodiments, but also includes the same or similar structures which can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0033] The technical, shape and structure parts not described in detail in the utility model are well-known technologies.

Claims

1. A rod mill drum screen exhaust gas treatment system, characterized in that, The system includes a water tank (10), and a chamber located above the aqueous solution (20) within the water tank (10) is separated by a partition (13) to form an exhaust chamber (11) and an intake condensation chamber (12). The exhaust chamber (11) is provided with an exhaust pipe (50) that communicates with the atmosphere. The intake condensation chamber (12) is connected to the exhaust gas discharge pipe (60) of the rod mill (80). A condensation assembly for condensing exhaust gas is arranged in the intake condensation chamber (12), and the condensation end of the condensation assembly extends into the interior of the aqueous solution (20). The system also includes a gas guide pipe for guiding gas, and the exhaust end and the intake end of the gas guide pipe are respectively inserted into the aqueous solution (20) below the exhaust chamber (11) and into the intake condensation chamber (12).

2. The rod mill drum screen exhaust gas treatment system according to claim 1, characterized in that, The condensation assembly includes a condenser rod (30) vertically arranged in the air intake condensation chamber (12), the upper end of the condenser rod (30) penetrating the water tank (10) and connected to the condenser (40), and the lower end of the condenser rod (30) extending into the interior of the aqueous solution (20).

3. The rod mill drum screen exhaust gas treatment system according to claim 2, characterized in that, From a top-down perspective, the condenser rods (30) are arranged in a lattice pattern.

4. The rod mill drum screen exhaust gas treatment system according to any one of claims 1-3, characterized in that, The air guide pipe includes a fan (70) and an inlet pipe (71) and an outlet pipe (72) connected to the input and output ends of the fan (70) respectively. The free end of the inlet pipe (71) is connected to the inlet condenser chamber (12) and the free end of the inlet pipe (71) constitutes the exhaust end of the air guide pipe. The free end of the outlet pipe (72) is inserted into the aqueous solution (20) below the exhaust chamber (11) and the free end of the outlet pipe (72) constitutes the exhaust end of the air guide pipe.

5. The rod mill drum screen exhaust gas treatment system according to any one of claims 1-3, characterized in that, The water tank (10) is equipped with an impeller (90) for agitating the aqueous solution (20).

6. The rod mill drum screen exhaust gas treatment system according to claim 5, characterized in that, The impeller (90) is arranged at the exhaust end of the air guide pipe.

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