CN214234299U - Air draft and induction device of coal gasification rod mill - Google Patents

Abstract

The utility model discloses a coal gasification rod mill air draft induced draft device, which comprises an induced draft pipe connected with a discharge port of a rod mill. And a pretreatment device for pulping waste gas discharged by the rod mill is arranged on the induced draft tube between the fan and the rod mill. The pretreatment device comprises V-shaped pipes which are horizontally spaced and are connected into the induced draft pipe in a penetrating mode, and a condensate collecting device is arranged at the bottoms of the V-shaped pipes. And the middle equal-height points of the V-shaped pipe are communicated with an exhaust pipe. The V-shaped pipes arranged on the induced draft pipe at intervals have the effect of separating the pulping waste gas and the condensate, improve the ordered discharge of the waste gas and the condensate, avoid the problem that the harmful gas is escaped to influence the field environment and the health of personnel, and simultaneously avoid the problem that the condensate is easily burnt after entering the fan. The exhaust pipe further reduces the problem that the waste gas carries condensate to pass through the fan, improves the normal operation period of the fan, and reduces the working hours of replacement and maintenance of the fan and the shutdown time of the rod mill.

Description

Air draft and induction device of coal gasification rod mill

Technical Field

The utility model relates to a coal chemical industry or use methanol as raw materials for production's coal slurry gasification technical field, especially relate to a coal gasification rod mill convulsions induced draft device.

Background

China is a country with more coal and less oil, coal still serves as the energy resource mastery of China for a long time, the efficient and clean utilization of the coal has important strategic significance to China, and a coal utilization system taking coal gasification as the core is an important technology for comprehensively solving the energy problem of China. Among the coal gasification technologies, the coal water slurry gasification technology is the mainstream direction for the development of the coal gasification technology because of wide application range of coal types, high gasification temperature and pressure and easy large-scale production. According to the development trend of coal water slurry gasification and the industrial operation effect in recent years, the rod mill is the key equipment for preparing the coal water slurry, and mainly prepares raw material coal, production wastewater and additives into the coal water slurry with high concentration, low viscosity and good stability.

Through long-term production observation, the pulping waste gas of the rod mill is discharged through a pipeline fan, and due to the influence of condensate and fan air volume, dust-containing harmful gas is easy to escape, the field environment and the health of personnel are influenced, and the phenomenon that the motor is easily burnt out when the condensate enters the motor is caused. Therefore, the air draft and air induction device of the coal gasification rod mill is necessary to design.

Disclosure of Invention

To the problem that exists, the utility model aims at providing a coal gasification rod mill convulsions induced air device, include the induced duct that links to each other with the discharge gate of rod mill, the discharge gate end of induced duct is equipped with the fan, is equipped with the preprocessing device of slurrying waste gas on the induced duct. Can carry out the preliminary treatment with the condensate of slurrying waste gas through this preprocessing device before through the fan, stop and reduce the influence that the condensate caused to the fan, improve the cycle of fan normal operating, reduce its man-hour of changing the maintenance, and the machine halt of rod mill is long.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a coal gasification rod mill convulsions induced air device, its includes the induced duct that links to each other with the discharge gate of rod mill, the discharge gate end of induced duct is equipped with the fan, wherein be equipped with the preprocessing device who is used for the exhaust slurrying waste gas of rod mill on the induced duct between fan to the rod mill.

Preferably, the pretreatment device comprises a V-shaped pipe which is horizontally spaced and is connected into the induced draft pipe in a penetrating mode, and a condensate collecting device is arranged at the bottom of the V-shaped pipe.

Preferably, the V-shaped pipe is provided with a left pipe and a right pipe which are symmetrically communicated with the induced air pipe, and a bottom pipe communicated with the left pipe and the right pipe, the middle parts of the left pipe and the right pipe are communicated with an exhaust pipe at equal height, and the exhaust pipe is lower than the induced air pipe.

Preferably, the middle part of the exhaust pipe is of an arc-shaped pipe structure facing the induced draft pipe.

Preferably, the condensate collecting device comprises a condensing pipe, a valve and a condensation recycling main pipe which are arranged at the bottom of each bottom pipe.

The utility model has the advantages that: (1) the V-shaped pipes arranged on the induced draft pipe at intervals have the effect of separating the pulping waste gas and the condensate, improve the ordered discharge of the waste gas and the condensate, avoid the problem that the harmful gas is escaped to influence the field environment and the health of personnel, and simultaneously avoid the problem that the condensate is easily burnt after entering the fan. (2) The exhaust pipe further reduces the problem that the waste gas carries condensate to pass through the fan, improves the normal operation period of the fan, and reduces the working hours of replacement and maintenance of the fan and the shutdown time of the rod mill.

Drawings

Fig. 1 is the connection schematic diagram of the whole structure of the air draft device and the rod mill of the utility model.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.

Referring to the attached drawing 1, the air draft and induction device for the coal gasification rod mill comprises an air draft pipe 1 connected with a discharge port 101 of a rod mill 10, and a fan 2 is arranged at a discharge port end 1a of the air draft pipe 1. The fan 2 extracts, discharges and discharges the pulping waste gas in the rod mill 10 through the induced draft tube 1, realizes the orderly discharge of the pulping waste gas, and solves the problem that the harmful gas escapes to influence the site environment and the health of personnel. The fan 2 is preferably a centrifugal fan, is suitable for pulping waste gas containing dust, has large air quantity, low energy consumption, is beneficial to ventilation, has simple structure and operation, does not need to consider the change of specific volume of gas, is convenient to maintain and has low cost. The pipe diameter of the centrifugal fan is preferably DN300, and the pressure is 150 bar.

In order to solve the problem that the motor is burnt down when the condensate of the pulping waste gas enters the fan 2, a pretreatment device for the pulping waste gas discharged by the rod mill 10 is arranged on the induced draft tube 1 between the fan 2 and the rod mill 10. Can carry out the preliminary treatment with the condensate of slurrying waste gas through this preprocessing device before fan 2, stop and reduce the influence that the condensate caused to fan 2, improve the cycle of fan 2 normal operating, reduce its man-hour of changing the maintenance, and long when shutting down of rod mill 10.

Specifically, the pretreatment device comprises V-shaped pipes 3 (preferably made of carbon steel, with the pipe diameter of DN300 and the pressure of 150bar) which are horizontally spaced and are connected into the induced draft pipe 1 in a penetrating manner, and a condensate collecting device is arranged at the bottoms of the V-shaped pipes 3. Through the characteristics of condensate gravity circulation, the condensate in the induced draft pipe 1 is deposited at the bottom of the V-shaped pipe 3 and is collected in a concentrated mode through a condensate collecting device, and the gas of the pulping waste gas is orderly discharged and collected under the action of the fan 2, so that the condensate is effectively prevented from being burnt out through the fan 2.

The fan 2 passes through the V-shaped pipe 3 together with the condensate, and under the pumping action force of the fan 2, part of the condensate is carried and discharged through the fan 2, so that the influence on the fan 2 is caused. In order to avoid this problem, the V-shaped pipe 3 has a left pipe 3a and a right pipe 3b symmetrically communicating with the induced duct 1, and a bottom pipe 3c communicating with the left pipe 3a and the right pipe 3b, and an exhaust pipe 4 is communicated with the middle of the left pipe 3a and the right pipe 3b at an equal height, and the exhaust pipe 4 is lower than the induced duct 1. The function is as follows: because the gas of pulping waste gas does not have the effect of gravity sinking, the gas is discharged through the exhaust pipe 4 higher than the bottom pipe 3c, the separation of the waste gas and the condensate is realized, and the problem that the gas carries the condensate to pass through the fan 2 is avoided. And because the exhaust pipe 4 is communicated with the middle parts of the left side pipe 3a and the right side pipe 3b, if condensate is contained in the exhaust pipe 4, the condensate flows into the bottom pipe 3c through the right side pipe 3b again, and the problem that the condensate passes through the fan 2 is further avoided. Meanwhile, the exhaust pipe 4 is lower than the induced draft pipe 1, so that condensate is prevented from being horizontally discharged along the induced draft pipe 1 and passing through the action of the fan 2.

Further, in order to enable the condensate remaining in the exhaust pipe 4 to flow into the bottom pipe 3c for gathering, the middle part of the exhaust pipe 4 is of an arc-shaped pipe structure facing the induced draft pipe 1. The arc-shaped pipe structure effectively avoids the gathering amount of condensate in the exhaust pipe 4, and reduces the carrying of waste gas.

Specifically, the condensate collecting device comprises a condensing pipe 5, a valve 6 and a condensation recycling main pipe 7 which are arranged at the bottom of each bottom pipe 3 c. The discharge of condensate from the bottom pipe 3c is controlled by a valve 6. On one hand, the condensate is prevented from being accumulated more and passes through the action of the fan 2 along the induced draft pipe 1; on the other hand, when the pulping waste gas is dry and the condensate is less, the opening degree of the valve 6 can be reduced, the problem that the waste gas is discharged from the condensation pipe 5 and the recovery main pipe 7 is avoided, and meanwhile, the air draft efficiency of the fan 2 is improved.

The principle of the utility model is that: the V-shaped pipes 3 arranged on the induced draft pipe 1 at intervals have the function of separating the pulping waste gas from the condensate, and the problem that the condensate is easily burnt out after entering the fan 2 is solved. The exhaust pipe 4 further reduces the problem that the exhaust gas carries condensate to pass through the fan 2, improves the normal operation period of the fan 2, and reduces the replacement and maintenance man-hour and the shutdown time of the rod mill 10.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. The utility model provides a coal gasification rod mill convulsions induced air device, its includes induced duct (1) that links to each other with discharge gate (101) of rod mill (10), discharge gate end (1a) of induced duct (1) is equipped with fan (2), wherein be equipped with the preprocessing device that is used for with rod mill (10) exhaust slurrying waste gas on induced duct (1) between fan (2) to rod mill (10).

2. The air draft device of the coal gasification rod mill of claim 1, wherein: the pretreatment device comprises V-shaped pipes (3) which are horizontally spaced and are connected into the induced draft pipe (1) in a penetrating mode, and a condensate collecting device is arranged at the bottoms of the V-shaped pipes (3).

3. The air draft device of the coal gasification rod mill of claim 2, wherein: the V-shaped pipe (3) is provided with a left side pipe (3a) and a right side pipe (3b) which are symmetrically communicated with the induced duct (1), and a bottom pipe (3c) communicated with the left side pipe (3a) and the right side pipe (3b), the middle parts of the left side pipe (3a) and the right side pipe (3b) are communicated with an exhaust pipe (4) at equal height points, and the exhaust pipe (4) is lower than the induced duct (1).

4. The air draft device of the coal gasification rod mill according to claim 3, wherein: the middle part of the exhaust pipe (4) is of an arc-shaped pipe structure facing the induced draft pipe (1).

5. The air draft device of the coal gasification rod mill according to claim 4, wherein: the condensate collecting device comprises each condensing pipe (5) arranged at the bottom of the bottom pipe (3c), a valve (6) and a condensation recovery main pipe (7).

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