Stabilizing device for negative pressure measurement of heating furnace

Abstract

A stabilizing device for negative pressure measurement of a heating furnace comprises a pressure taking cylinder (1), a flow dividing cylinder (2) and an air-capacitor air-resistance cylinder (3) which are communicated in sequence, a group of condensation air holes (4) are formed in the bottom of the pressure taking cylinder (1), a group of partition plates (5) are arranged in the flow dividing cylinder (2) in a staggered mode, and a process connecting pipe (6) is arranged at the top of the air-capacitor air-resistance cylinder (3). The device has the advantages that the disturbance resistance to external environment changes is improved, the flow dividing and pressure stabilizing function of the flow dividing section and the buffering and stabilizing function of the air capacitor and the air resistor are designed through calculation, the air pressure influence caused by the external environment changes can be reduced, and the stability of parameter measurement is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to negative pressure measuring equipment field, concretely relates to a kind of heating furnace negative pressure measurement stabilizing device. BACKGROUND

[0002] Currently, heating furnace hearth negative pressure is the process production process strictly controlled process index, not allow substantial fluctuation. Heating furnace negative pressure measurement generally uses differential pressure transmitter to complete, and furnace hearth negative pressure measurement fluctuation is the difficult problem that process operator has long been plagued, it is particularly obvious under the condition that environment strip changes sharply, such as strong wind and heavy rain. By increasing negative pressure stabilizing device, reduce the influence of barometric variation caused by external environment on negative pressure measurement, guarantee the reliability and stability of heating furnace negative pressure measurement, provide basis for process operation adjustment, provide data support for judging heating furnace operating condition and equipment problem, can also ensure that heating furnace interlock (interlock) loop action is stable and reliable, avoid interlock action to cause process operation fluctuation, influence the entire device stability operation. SUMMARY

[0003] The utility model discloses a kind of heating furnace negative pressure measurement stabilizing device to solve the problems of the prior art.

[0004] The utility model discloses a kind of heating furnace negative pressure measurement stabilizing device to solve the problems of the prior art.

[0005] The bottom of the pressure-taking cylinder is provided with a group of condensation gas holes, a group of baffles are arranged in the shunt cylinder in a staggered manner, and the top of the gas capacity gas resistance cylinder is provided with a process connecting pipe.

[0006] The baffle is a circular baffle, and an arc-shaped air passage region is formed between the baffle and the inner wall of the shunt cylinder.

[0007] The diameter of the pressure-taking cylinder is 8-10mm, the pressure-taking cylinder is welded at the bottom of the shunt cylinder, and the top gas outlet of the pressure-taking cylinder is connected with the bottom gas inlet of the shunt cylinder.

[0008] The diameter of the shunt cylinder is 10-14mm, the shunt cylinder is welded at the bottom of the gas capacity gas resistance cylinder, and the top gas outlet of the shunt cylinder is connected with the bottom gas inlet of the gas capacity gas resistance cylinder.

[0009] The diameter of the gas capacity gas resistance cylinder is 22-30mm, and the process connecting pipe is welded on the top gas outlet of the gas capacity gas resistance cylinder.

[0010] The diameter of the process connecting pipe is 8-12mm.

[0011] The number of the group of condensation gas holes is two.

[0012] The diameter of the condensation gas hole is 1-3mm.

[0013] The utility model has the advantages that:

[0014] Improved resistance to changes in the external environment: Through calculation, the diversion and pressure stabilization function of the diversion section and the buffer stabilization function of gas capacity and gas resistance were designed, which can reduce the influence of air pressure caused by changes in the external environment and improve the stability of parameter measurement.

[0015] Improved reliability: Due to changes in air density, moisture in humid air continuously condenses into water, causing liquid to accumulate on the pressure tapping side. A condensation vent is designed at the air inlet to reduce the impact of liquid accumulation on the measurement process and improve the stability of parameter measurement.

[0016] Highly practical and applicable: This invention is suitable for measuring negative pressure in heating furnaces of refining and chemical enterprises and has broad application prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the partition of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of this utility model connected to the measuring diaphragm box. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, if terms such as "first" or "second" appear in the description of this invention, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0026] As shown in the attached figure, this utility model includes a pressure tapping cylinder 1, a flow divider cylinder 2, and a gas-capacitance and gas-resistance cylinder 3 connected in sequence.

[0027] The pressure tapping cylinder 1 has a set of condensate holes 4 at the bottom, the flow divider 2 has a set of baffles 5 arranged in an alternating pattern, and the gas capacity and gas resistance cylinder 3 has a process connection pipe 6 at the top.

[0028] The partition 5 is a circular partition, and an arc-shaped ventilation area is formed between one side of the partition 5 and the inner wall of the diversion cylinder 2.

[0029] The pressure tapping cylinder 1 has a diameter of 8-10mm. The pressure tapping cylinder 1 is welded to the bottom of the distributor cylinder 2. The top air outlet of the pressure tapping cylinder 1 is connected to the bottom air inlet of the distributor cylinder 2.

[0030] The diameter of the flow divider 2 is 10-14mm. The flow divider 2 is welded to the bottom of the gas container and gas resistance cylinder 3. The top air outlet of the flow divider 2 is connected to the bottom air inlet of the gas container and gas resistance cylinder 3.

[0031] The diameter of the gas-capacitance and gas-resistance cylinder 3 is 22-30mm, and the process connecting pipe 6 is welded to the air outlet at the top of the gas-capacitance and gas-resistance cylinder 3.

[0032] The diameter of process connection pipe 6 is 8-12mm.

[0033] The number of condensation vents 4 in a set is two.

[0034] The diameter of the condensation pore 4 is 1-3mm.

[0035] Example 1: Outside air enters the pressure tapping cylinder 1 through the condensation vent 4. The pressure tapping cylinder 1 is used to sample and pre-treat the outside air, and at the same time to perform stability treatment, reducing or even eliminating the influence of changes in the external environment on the negative pressure measurement of the heating furnace. At the equipment site, liquid accumulation will occur. During this process, the differential pressure is constantly changing, while the negative pressure of the heating furnace is generally tens of Pascals or even less. Even a small change in differential pressure can cause large fluctuations in the measurement. A set of condensation vents 4 is opened at the bottom of the pressure tapping cylinder 1 to ensure that the condensed liquid is discharged smoothly.

[0036] Air from pressure tapping cylinder 1 enters flow divider cylinder 2. Based on the principle of throttling and pressure stabilization, the air is guided by a set of baffles 5 to form an "S"-shaped flow path system, which attenuates the sudden changes in air pressure caused by external environmental factors and further stabilizes the stability of negative pressure measurement.

[0037] The air in the diverter 2 enters the air-capacity air-resistance cylinder 3. In a space with a sufficiently large capacity, the air passing through the diverter 2 has a very small impact on the air pressure change in the entire air-capacity air-resistance cylinder 3, thus playing a role in stabilizing the air pressure.

[0038] The airflow inside the gas-capacitance cylinder 3 is connected to the measuring diaphragm of the differential pressure transmitter via the process connection pipe 6. This ensures that the pressure stabilizing device can be connected to the equipment interface via this process connection pipe 6 and matching process connectors such as compression fittings, thereby enabling the measurement of the negative pressure in the heating furnace.

[0039] As attached Figure 4 As shown, the process connection pipe 6 is connected to the negative pressure diaphragm box 100 of the differential pressure transmitter, and the positive pressure diaphragm box 101 of the differential pressure transmitter is connected to the pressure tap 102 of the process equipment.

Claims

1. A stabilizing device for measuring negative pressure in a heating furnace, characterized in that... It includes a pressure tapping cylinder (1), a flow divider cylinder (2), and a gas-capacitance and gas-resistance cylinder (3) connected in sequence. The pressure tapping cylinder (1) has a set of condensate holes (4) at the bottom, and a set of baffles (5) are arranged alternately inside the flow divider (2). The gas capacity and gas resistance cylinder (3) has a process connection pipe (6) at the top.

2. The stabilizing device for measuring negative pressure in a heating furnace according to claim 1, characterized in that, The partition (5) is a circular partition, and an arc-shaped ventilation area is formed between one side of the partition (5) and the inner wall of the diversion tube (2).

3. The stabilizing device for measuring negative pressure in a heating furnace according to claim 2, characterized in that, The pressure tapping cylinder (1) has a diameter of 8-10 mm. The pressure tapping cylinder (1) is welded to the bottom of the distributor cylinder (2). The top air outlet of the pressure tapping cylinder (1) is connected to the bottom air inlet of the distributor cylinder (2).

4. The stabilizing device for measuring negative pressure in a heating furnace according to claim 3, characterized in that, The diameter of the flow divider (2) is 10-14mm. The flow divider (2) is welded to the bottom of the gas container and gas resistance cylinder (3). The top air outlet of the flow divider (2) is connected to the bottom air inlet of the gas container and gas resistance cylinder (3).

5. The stabilizing device for measuring negative pressure in a heating furnace according to claim 4, characterized in that, The diameter of the gas-capacitance gas-resistance cylinder (3) is 22-30mm, and the process connection pipe (6) is welded to the gas outlet at the top of the gas-capacitance gas-resistance cylinder (3).

6. The stabilizing device for measuring negative pressure in a heating furnace according to claim 5, characterized in that, The diameter of the process connection pipe (6) is 8-12mm.

7. The stabilizing device for measuring negative pressure in a heating furnace according to claim 1, characterized in that, The number of condensation vents (4) in a set is two.

8. The stabilizing device for measuring negative pressure in a heating furnace according to claim 1, characterized in that, The pore diameter of the condensation pore (4) is 1-3 mm.

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