CN205897098U

CN205897098U - Power boiler chamber negative pressure sampler

Info

Publication number: CN205897098U
Application number: CN201620693505.5U
Authority: CN
Inventors: 邹永平; 赵辉
Original assignee: China Resources Power Changshu Co Ltd
Current assignee: China Resources Power Changshu Co Ltd
Priority date: 2016-07-05
Filing date: 2016-07-05
Publication date: 2017-01-18
Anticipated expiration: 2026-07-05

Abstract

The utility model discloses a power boiler chamber negative pressure sampler, include: pre -buried pipe, pre -buried pipe setting is on hearth wall, pre -buried pipe is the cylinder hierarchical structure, material selection stainless steel material, it has set up negative pressure transducer to be connected on pre -buried pipe and hearth wall, negative pressure transducer is the pressure transmitter form, and it has set up the sampling tube to have set up to connect on pre -buried pipe, negative pressure transducer passes through the wire and has connected the controller, two flanges have been set up at pre -buried tub of opposite side, it maybe flange A and flange B to divide, flange A and flange B pass through the lock nut connection and are a whole, the utility model relates to a power boiler chamber negative pressure sampler can prevent that sampling device from blockking up, and sensitivity and accuracy improve, have ensured chamber negative pressure's normal use.

Description

A kind of boiler of power plant combustion chamber draft sampler

Technical field

The utility model is related to boiler of power plant apparatus field, more particularly to a kind of boiler of power plant combustion chamber draft sampler.

Background technology

Thermal power generation is the main generation mode of China, and station boiler is one of three big main process equipments of firepower power station, electricity Boiler of standing utilizes the energy heats feedwater of fuel combustion release, obtains high temperature, the steam of high pressure, by high temperature, the steam of high pressure is defeated Deliver in steam turbine, pushing turbine rotates, and drive generator to rotate and produce electric energy, station boiler mainly includes pot and stove two Individual part, pot part is each heating surface that working media flows through, and generally comprises economizer, water-cooling wall, superheater and reheater Deng and through-flow discrete device such as header, drum etc., stove is generally referred to as the burning place of fuel and exhaust gases passes, such as burner hearth, Horizontal flue and back-end ductwork etc.,

Wherein burner hearth is the important part of boiler, and burner hearth is the space organizing fuel combustion in boiler, also referred to as fires Burn room, burner hearth becomes chemical energy into heat energy, also undertakes the task of tissue burner hearth heat exchange it should can guarantee that fuel after-flame, and make Flue gas has been cooled to the temperature making convection heating surface trouble free service behind be allowed at furnace outlet.

Burner hearth is sampled with work extremely important, ensure that burner hearth runs steadily in the long term, but, in real work In, lead to the situation of blocking so that negative pressure sampler can't detect the environment in burner hearth through being commonly encountered furnace pressure sampler Parameter, thus affect the safety of boiler.

Utility model content

, mainly solving the technical problems that providing a kind of boiler of power plant combustion chamber draft sampler, performance is steady for the utility model Fixed, sensitivity is high, avoids the situation of traditional sampler blocking simultaneously.

Combustion chamber draft is mainly using exhaust gas volumn as measurement.When air output changes with boiler load amount and changes, change Become exhaust gas volumn to make and blow amount phase equilibrium, thus by hearth vacuum control it is ensured that the safe operation of boiler in rated range, Therefore, combustion chamber draft is reflection boiler combustion situation stably whether important parameter, be run in control and monitor important One of parameter.In stove, combustion conditions once change, and combustion chamber draft is with generation respective change.

Described a kind of boiler of power plant combustion chamber draft sampler, comprising: built-in pipe, built-in pipe is arranged on hearth wall, in advance Pipe laying is cylinder hierarchy, and material selects stainless steel material.Connect setting negative pressure sensing on built-in pipe and the hearth wall Device, B/P EGR Back Pressure Transducer EGR is pressure transmitter form, and is provided with built-in pipe connect setting probe tube.

B/P EGR Back Pressure Transducer EGR is connected to controller by wire, is provided with two flanges in built-in pipe opposite side, is method respectively Blue a and flange b, flange a and flange b are connected as an entirety by locking nut.

Locking nut is easy to disassemble simultaneously, by locking nut is turned in some cycles, thus opening flange b, leads to Cross flange a connection and fill air assembly, the particle that can make, iron rust dispels it is therefore prevented that blocking, because flange a and pre-buried pipe diameter Larger, therefore convenient purging.

The beneficial effects of the utility model are: a kind of the utility model boiler of power plant combustion chamber draft sampler, are prevented from Sampler blocks, and sensitivity and accuracy improve it is ensured that the normal use of combustion chamber draft.

Brief description

Fig. 1 is the structural representation of existing boiler of power plant combustion chamber draft sampler；

Fig. 2 is a kind of structural representation of the utility model boiler of power plant combustion chamber draft sampler；

In accompanying drawing, the mark of each part is as follows:

1 is burner hearth, and 2 is built-in pipe, and 3 is probe tube, and 4 is flange a, and 5 is flange b, and 6 is B/P EGR Back Pressure Transducer EGR, and 7 is wire, 8 For controller, 9 is locking nut.

Specific embodiment

Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model Can be easier to be readily appreciated by one skilled in the art with feature, thus make apparent clear and definite to protection domain of the present utility model Define.

Refer to Fig. 1 and Fig. 2, the utility model embodiment includes:

Described a kind of boiler of power plant combustion chamber draft sampler, comprising: built-in pipe, built-in pipe is arranged on hearth wall, in advance Pipe laying is cylinder hierarchy, and material selects stainless steel material.Stainless steel selects 304 stainless steels or 316 stainless steels, pre- Connect setting B/P EGR Back Pressure Transducer EGR on pipe laying and hearth wall, B/P EGR Back Pressure Transducer EGR is pressure transmitter form, and be provided with pre- Connect setting probe tube on pipe laying.

The foregoing is only embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model, every The equivalent structure made using the utility model specification and accompanying drawing content or equivalent flow conversion, or be directly or indirectly used in Other related technical fields, are all included in the same manner in scope of patent protection of the present utility model.

Claims

1. a kind of boiler of power plant combustion chamber draft sampler is it is characterised in that include: built-in pipe, and built-in pipe is arranged on hearth wall, Built-in pipe is cylinder hierarchy, material selects stainless steel material, connect setting negative pressure biography on built-in pipe and hearth wall Sensor, B/P EGR Back Pressure Transducer EGR is pressure transmitter form, and is provided with built-in pipe connect setting probe tube, and negative pressure passes Sensor is connected to controller by wire, is provided with two flanges in built-in pipe opposite side, is flange a and flange b respectively, flange A and flange b is connected as an entirety by locking nut, and locking nut is easy to disassemble, passes through locking screw in some cycles Mother turns on, thus opening flange b, being connected by flange a and filling air assembly, the particle that can make, and iron rust dispels it is therefore prevented that blocking up Plug.