CN213714872U - A compound sampling rifle of smoke and dust entrapment for ultra-low emission coal-fired unit - Google Patents

Abstract

The utility model discloses a smoke dust trapping composite sampling gun for an ultra-low emission coal-fired unit, which relates to the technical field of smoke detection, wherein a connecting part is communicated with a pipe body, and the tail end of the pipe body is provided with a gas outlet; the condensation pipe with the spiral structure is arranged by being attached to the inner wall of the pipe body, the bottom of the pipe body is provided with a flow guide structure corresponding to the length and the position of the condensation pipe, and the tail end of the flow guide structure is provided with a water collecting tank communicated with the flow guide structure; the front end of the connecting part is an air inlet which is communicated and fixed with the sampling head through a pressing ring at the air inlet, and the air outlet is communicated with the sampling pump. The utility model discloses establish spiral helicine condenser pipe in the body inner wall iron of sampling pipe, in the sampling process, a large amount of steam in the condenser pipe is to the flue gas condenses to make the water droplet that the steam liquefaction formed along its gliding to the water conservancy diversion structure in, collect in the water catch bowl through the water conservancy diversion structure whereabouts, can prevent effectively that the water droplet that the condensation of sampling pipe inner wall formed from refluences to the sampling head and pollutes the filter membrane when removing the sampling rifle, guarantee the normal use of sampling rifle.

Description

A compound sampling rifle of smoke and dust entrapment for ultra-low emission coal-fired unit

Technical Field

The utility model relates to a flue gas detection technical field, concretely relates to a sampling rifle that is used for carrying out the sampling to ultralow coal-fired unit emission flue gas that discharges.

Background

The pipeline pollution source particle measurement is a process for measuring the concentration of particles in the smoke discharged by an exhaust pipeline of an ultra-low emission coal-fired unit, and is generally carried out by using a pitot tube parallel smoke dust sampling instrument. In the measuring process, the concentration of the particulate matters in the flue gas of the pipeline is obtained by measuring the dust-containing collecting amount, the sampling volume and various parameters in the pipeline.

At present, the ultra-low emission coal-fired unit mostly adopts a wet method to remove harmful substances in the flue gas before emission, so that the emitted flue gas generally contains a large amount of water vapor. In the flue gas sampling process of pipeline pollution source particulate matter survey, a large amount of aqueous vapor can condense in the sampling pipe inside, and once sampling work finishes, when needing to change the sampling hole and sampling once more, the in-process that the sampling rifle removed, and the water of the inside condensation of sampling pipe extremely easily flows back to the sampling head and pollutes the filter membrane, influences the normal use of sampling rifle. Meanwhile, when the high negative pressure pipeline sample is replaced, the particulate matter sample trapped by the sampling gun is possibly sucked back to the sampling environment due to the change of the pressure difference after the sampling pump stops working, so that the normal operation of the sampling work is influenced. In addition, the existing sampling gun needs to be heated in the whole sampling process, and is complex in structure and high in energy consumption.

SUMMERY OF THE UTILITY MODEL

The utility model discloses just in order to avoid the weak point that above-mentioned prior art exists, provide a compound sampling rifle of smoke and dust entrapment for ultra-low emission coal-fired unit.

The utility model discloses a solve technical problem and adopt following technical scheme: a soot trapping composite sampling gun for an ultra-low emission coal-fired unit is characterized in that a connecting part is sequentially communicated with a pipe body, and an air outlet is formed in the tail end of the pipe body; the condensation pipe with the spiral structure is arranged by being attached to the inner wall of the pipe body and is fixedly connected with the pipe body, a flow guide structure is arranged at the bottom of the pipe body corresponding to the length and the position of the condensation pipe, and a water collecting tank communicated with the flow guide structure is arranged at the tail end of the flow guide structure to form a sampling pipe; the front end of the connecting part is an air inlet which is communicated and fixed with the sampling head through a pressing ring at the air inlet, and the air outlet is communicated with the sampling pump.

Furthermore, the bottom of the water collecting tank is connected with a bolt in a threaded fit manner.

Furthermore, the flow guide structure is a flow guide cavity, and the flow guide cavity collects water sliding up and down through the flow guide holes arranged at the top of the flow guide cavity.

Furthermore, a one-way air valve communicated from the air inlet to the air outlet is further arranged in the pipe body and is positioned between the air inlet and the condensation pipe.

Further, the one-way air valve is made of stainless steel or titanium materials.

Furthermore, the condensation pipe is a vacuum copper pipe.

Further, a handle is arranged at the tail end of the sampling pipe.

Further, the water collecting tank is of a cylindrical or elliptic cylindrical hollow structure.

The utility model provides a compound sampling rifle of smoke and dust entrapment for ultralow coal-fired unit that discharges has following beneficial effect:

1. the utility model discloses establish spiral heliciform condenser pipe in the body inner wall iron of sampling pipe, in the sampling process, the condenser pipe condenses a large amount of steam in the flue gas to make the water droplet that steam liquefaction formed slide along it in to the water conservancy diversion structure, fall and collect in the water catch bowl through the water conservancy diversion of water conservancy diversion structure, can prevent effectively that the water droplet that the sampling pipe inner wall condensation formed from flowing backwards to the sampling head and polluting the filter membrane when removing the sampling rifle, guarantee the normal use of sampling rifle;

2. the one-way air valve is arranged between the condensation pipe and the air inlet in the pipe body, so that the situation that sundries are sucked to pollute a sample due to the fact that a sampling gun is in contact with a sampling hole wall when the sampling gun is moved out of a sampling hole after sample collection is finished can be effectively prevented, the sample smoke suck backwards due to pressure difference caused by the fact that a wall surface sampling pump stops working can be achieved, and sampling quality is guaranteed;

3. when the utility model is used for sampling the horizontal pipeline, the condensed water can not flow backwards due to the gravity effect and enter the sampling head, and when the vertical pipeline is sampled, the condensed water is collected in the water collecting tank, the backflow of the condensed water can be effectively prevented, and the utility model has better applicability;

4. the utility model discloses adopt the condensation of physical structure realization steam in the flue gas completely, need not to set up heating structure, simple structure, practical convenient, the energy consumption is low, low in manufacturing cost, has good practicality.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure:

1. the sampling device comprises a sampling head, 2, a pressing ring, 3, a sampling pipe, 31, a connecting part, 32, a pipe body, 33, an air inlet, 34, an air outlet, 35, a condensing pipe, 36, a flow guide structure, 37, flow guide holes, 38, a water collecting tank, 39 and bolts; 4. a one-way air valve; 5. a handle.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the structural relationship is: the connecting part 31 is communicated with the tube body 32 in sequence, and the tail end of the tube body 32 is provided with an air outlet 34; the condensation pipe 35 with the spiral structure is arranged by being attached to the inner wall of the pipe body 32 and is fixedly connected with the pipe body 32, the flow guide structure 36 is arranged at the bottom of the pipe body 32 corresponding to the length and the position of the condensation pipe 35, and the water collecting tank 38 communicated with the flow guide structure 36 is arranged at the tail end of the flow guide structure 36 to form the sampling pipe 3; the front end of the connecting part 31 is provided with an air inlet 33 which is communicated and fixed with the sampling head 1 through a pressing ring 2 at the air inlet 33, and an air outlet 34 is communicated with the sampling pump; when the flue gas passes through the pipe body 32, a large amount of water vapor in the flue gas is condensed into water drops on the outer wall of the condensing pipe 35, slides down along the condensing pipe 35 and falls into the flow guide structure 36, and flows into and is collected in the water collection tank 38 under the flow guide effect of the flow guide structure 36.

Preferably, the bottom of the water collecting tank 38 is connected with a bolt 39 in a threaded fit manner, and after more water is collected in the water collecting tank 38, the bolt 39 can be screwed out to discharge the water in the water collecting tank 38, so that the normal sampling is ensured.

Preferably, the diversion structure 36 is a diversion cavity, and the diversion cavity collects water sliding down the condensation pipe 35 through diversion holes 37 arranged at the top of the diversion cavity.

Preferably, a one-way air valve 4 communicated from the air inlet 33 to the air outlet 34 is further arranged in the tube body 32, and the one-way air valve 4 is positioned between the air inlet 33 and the condensation pipe 35; the one-way air valve 4 can prevent the smoke sample from being sucked backwards due to pressure difference after the sampling pump stops working so as to ensure the normal operation of the sampling work.

Preferably, the one-way valve 4 is made of stainless steel or titanium material.

Preferably, the condensation pipe 35 is a vacuum copper pipe.

Preferably, the tail end of the sampling tube 3 is provided with a handle 5, and the handle 5 is used for conveniently holding and operating the sampling gun.

Preferably, the water collection sump 38 has a cylindrical or elliptic cylindrical hollow structure.

When sampling the flue gas, send sampling rifle front end into the sampling hole, start the sampling pump after the sampling rifle targets in place. The flue gas sample flows through the sampling head 1, the air inlet 33, the connecting part 31, the pipe body 32, the air outlet 34 and the sampling pump in sequence under the action of the sampling pump and reaches the sampling container. After sampling is finished, the one-way air valve 4 and the sampling pump should be closed in sequence, and then the sampling gun is moved out of the sampling hole to avoid sample pollution or sample suck-back.

When a flue gas sample containing a large amount of water vapor passes through the pipe body 32, the flue gas sample is liquefied into water drops on the outer wall of the condensation pipe 35 under the condensation effect of the condensation pipe 35, slides downwards along the condensation pipe 35 to the flow guide structure 36, and then flows and is collected into the water collection tank 38 under the flow guide effect of the flow guide structure 36. When the water in the water collecting tank 38 is more, the screw 39 can be screwed to discharge the water in the water collecting tank 38.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (8)

1. The utility model provides a compound sampling rifle of smoke and dust entrapment for ultra-low emission coal-fired unit which characterized in that: the connecting part (31) is communicated with the pipe body (32) in sequence, and an air outlet (34) is formed in the tail end of the pipe body (32); the condensation pipe (35) of the spiral structure is attached to the inner wall of the pipe body (32) and is fixedly connected with the pipe body (32), a flow guide structure (36) is arranged at the bottom of the pipe body (32) corresponding to the length and the position of the condensation pipe (35), and a water collecting tank (38) communicated with the flow guide structure (36) is arranged at the tail end of the flow guide structure (36) to form a sampling pipe (3); the front end of the connecting part (31) is an air inlet (33), the air inlet (33) is communicated with the sampling head (1) through a pressing ring (2) and is fixedly connected with the sampling head, and the air outlet (34) is communicated with the sampling pump.

2. The soot capture compound sampling gun for an ultra-low emission coal-fired unit according to claim 1, characterized in that: and a bolt (39) is connected to the bottom of the water collecting tank (38) in a threaded fit manner.

3. The soot capture compound sampling gun for an ultra-low emission coal-fired unit according to claim 1, characterized in that: the flow guide structure (36) is a flow guide cavity, and water sliding up and down of the condensation pipe (35) is collected through flow guide holes (37) formed in the top of the flow guide cavity.

4. The soot capture compound sampling gun for an ultra-low emission coal-fired unit according to claim 1, characterized in that: the pipe body (32) is also internally provided with a one-way air valve (4) communicated from the air inlet (33) to the air outlet (34), and the one-way air valve (4) is positioned between the air inlet (33) and the condensation pipe (35).

5. The soot capture compound sampling gun for an ultra-low emission coal-fired unit according to claim 4, wherein: the one-way air valve (4) is made of stainless steel or titanium materials.

6. The soot capture compound sampling gun for an ultra-low emission coal-fired unit according to claim 1, characterized in that: the condensation pipe (35) is a vacuum copper pipe.

7. The soot capture compound sampling gun for an ultra-low emission coal-fired unit according to claim 1, characterized in that: the tail end of the sampling pipe (3) is provided with a handle (5).

8. The soot capture compound sampling gun for an ultra-low emission coal-fired unit according to claim 1, characterized in that: the water collecting tank (38) is of a cylindrical or elliptic cylindrical hollow structure.

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