CN209912492U

CN209912492U - High-efficient high temperature geothermol power well head silencer

Info

Publication number: CN209912492U
Application number: CN201920428599.7U
Authority: CN
Inventors: 甄臻; 孙文凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2020-01-07
Anticipated expiration: 2029-04-01

Abstract

The utility model discloses a high-efficient high temperature geothermol power well head silencer that belongs to geothermol power resource development field. The muffler is composed of a muffling tank body and a multi-stage dilatation muffling air inlet pipeline positioned in front of the muffling tank body. The connecting flange is sequentially connected with the flange connecting steel pipe, the I-grade silencing steel pipe, the II-grade silencing steel pipe and the III-grade conical silencing steel pipe; the III-grade conical silencing steel pipe is connected with the silencing tank body; an interception net is fixed on the upper part of the inner wall of the outer cylinder of the silencing tank body, and a guide plate is fixed below the interception net; the bottom of the outer cylinder is fixed with a tank body bottom plate; the balance weights of the silencing tanks are fixed on the lower part of the outer circumference of the outer cylinder at equal intervals, and a drain pipe is arranged in addition.

Description

High-efficient high temperature geothermol power well head silencer

Technical Field

The utility model belongs to geothermal resources development field, in particular to high-efficient high temperature geothermol power well head silencer.

Background

Due to the shortage of traditional energy supply and the pressure of environmental protection and environmental pollution control, more and more attention is paid to clean energy, and the demand for clean energy is rapidly increasing worldwide. As an important clean energy source, the development and utilization of geothermal resources are increasingly gaining attention. The long-term effective exploitation and utilization of geothermal resources must take into account the environmental pollution associated with them, and in particular, it is necessary to understand and comply with laws and regulations established in the country and region of geothermal exploitation in terms of environmental protection and health, and to take effective preventive and control measures. In the process of high-temperature geothermal development and utilization, a geothermal wellhead can continuously produce a high-temperature and high-pressure gas-liquid two-phase mixture, the wellhead pressure can usually reach 20Mpa, the wellhead temperature can reach 300 ℃ or even higher, and the flow can reach more than 150 tons/hour. The mixture mainly comprises geothermal steam, non-condensable gas (carbon dioxide, nitrogen, hydrogen sulfide and the like), brine, silt and other substances. Because geothermal steam is a high-temperature and high-pressure steam-liquid two-phase mixture, when the geothermal well head needs to freely discharge geothermal steam, strong noise can be generated at the geothermal well head and the adjacent area thereof, the noise influence range can reach more than 80 decibels, if proper noise control measures are not taken, the noise influence range formed by directly discharging geothermal production liquid can reach more than several kilometers, the hearing of personnel in the range of 50 meters can be damaged, and particularly, the geothermal well head testing personnel, the surrounding environment of the well head and the life and work nearby residents are greatly influenced.

The utility model discloses high temperature geothermol power well head silencer mainly comprises multistage dilatation noise elimination admission line 1 and the noise elimination jar body 2, controls and reduces the produced noise of geothermol power steam free discharge process through the silencer to ensure that the development of geothermol power resource satisfies corresponding healthy safety and environmental protection requirement.

During exploration and exploitation of geothermal resources, it is sometimes inevitable to freely discharge high temperature geothermal wellbore production fluids in certain ambient temperature and pressure conditions in the area, for example: (a) and (3) geothermal well production parameter testing: when one geothermal well needs to be tested for geothermal fluid output parameters and output change thereof, a production test is carried out on a new geothermal well, and production tests and analysis are carried out on part of the geothermal wells in a certain period (usually years) on some existing geothermal fields; (b) down time (which can vary from hours to days) for short periods of geothermal power plants (or other plants requiring geothermal steam). During the discharge of high temperature, high pressure geothermal fluids, a steam-brine mixture is formed as the pressure drops, while the velocity of the mixture reaches the sonic magnitude, thus generating very high noise levels. For high temperature geothermal wells in the vicinity of working or living areas, the treatment of the flash-evaporated geothermal brine under atmospheric conditions, if left free without specific treatment, would generate intolerable intense noise accompanied by a significant reduction in visibility and corrosion and contamination of the paint of the buildings windows and vehicles by the brine, for which necessary treatments must be carried out. The noise level that this in-process was brought for the surrounding environment is reduced to the primary function of silencer device, simultaneously the utility model discloses can also reduce to a certain extent that steam cloud and fog drops to building window and the destruction that vehicle oil gas caused to the brine water droplet that the visibility that causes for peripheral zone reduces and the steam that discharges condenses.

The silencer major structure of original geothermol power well head free discharge mainly is reinforced cement structure, because the steam volume that geothermal fluid discharged is big, its high temperature effect can lead to reinforced cement structure very easy fracture under violent thermal stress changes, and the live time is short to the working life and the reliability of silencer have been influenced.

The technical problem that will solve at present is to overcome original geothermol power well head noise eliminator not enough in the aspect of noise reduction effect and reliability, under the prerequisite that does not influence the normal operation of geothermol power well head and maintain work, introduce a high-efficient high temperature geothermol power well head noise eliminator device of simple installation and maintenance in the limited space region of geothermol power well head, the major structure of this kind of silencer chooses for use and waits that the stainless steel welding forms, can effectively reduce the influence and the destruction that the noise that produces to all ring edge borders and personnel caused along with the emission of geothermol power production liquid, simultaneously can effectually reduce steam emission to the atmosphere.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-efficiency high-temperature geothermal well mouth silencer aiming at the defects of the prior art, which is characterized in that the silencer consists of a silencing tank body 2 and a multi-stage expansion silencing air inlet pipeline 1 positioned in front of the silencing tank body 2;

the multistage dilatation noise elimination air inlet pipeline adopts a stepped expanding steel pipe structure, wherein the foremost end of the multistage dilatation noise elimination air inlet pipeline 1 is provided with a connecting flange 3, the connecting flange 3 is sequentially connected with a flange connecting steel pipe 4, an I-grade noise elimination steel pipe 5, an II-grade noise elimination steel pipe 6 and a III-grade conical noise elimination steel pipe 7; the III-grade conical silencing steel pipe 7 is connected with the silencing tank body 2; an interception net 9 is fixed on the upper part of the inner wall of the outer cylinder 8 of the silencing tank body 2, and a guide plate 10 is fixed below the interception net 9; a tank body bottom plate 11 is fixed at the bottom of the outer cylinder 8; the balance weight 12 of the silencing pot is fixed on the lower part of the outer circumference of the outer cylinder 8 at equal distance, and a drain pipe 13 is arranged.

The silencer is directly connected with a geothermal wellhead pipeline through a flange, and an elastic sealing combined gasket is additionally arranged at the connecting flange.

The intercepting net is made of prismatic steel plate nets.

The beneficial effects of the utility model are that the requirement of site operation and installation has been fully considered, has overcome the high temperature steam effect and has leaded to the reinforced cement structure easy fracture under violent thermal stress change to the working life of silencer and the defect of reliability have been influenced. The strong noise pollution brought by free discharge of produced liquid of the geothermal wellbore can be effectively reduced, and the method has good noise control capability and good noise reduction effect; and the method provides guarantee for long-term and effective development and utilization of geothermal resources. Meanwhile, the geothermal wellhead muffler is simple and reliable in structure and convenient to install and maintain. The required space for arrangement in the region of the geothermal wellhead is small; the underground water-saving device is particularly suitable for the condition of geothermal well mouths with limited working spaces, the inside water drop intercepting net can effectively reduce water drops to be discharged to the atmosphere along with steam, the water recharging amount can be increased, and the waste of water resources is reduced.

Drawings

Fig. 1 is a schematic front view of a geothermal wellhead muffler assembly.

Fig. 2 is a view showing the structure of the sound-deadening tank.

Fig. 3 is a top view of fig. 1.

In the figure, 1, a multi-stage expansion noise elimination air inlet pipeline; 2, a silencing tank body; 3-connecting a flange; 4, flange connecting the steel pipes; 5-I grade silencing steel pipe; 6-II grade silencing steel pipe; 7-III grade conical silencing steel pipe; 8, an outer barrel; 9-an interception net; 10-a deflector; 11-tank bottom plate; 12-silencing tank counterweight; 13-a drain pipe.

Detailed Description

The utility model provides a high-efficiency high-temperature geothermal well mouth silencer, which comprises a silencing tank body and a multi-stage dilatation silencing air inlet pipeline positioned in front of the silencing tank body; the present invention will be further explained with reference to the accompanying drawings.

Fig. 1 shows a schematic front view of a geothermal wellhead muffler assembly. Fig. 2 is a view showing the structure of the sound-damping can body. In the figure, the multistage dilatation noise elimination air inlet pipeline adopts a stepped expanding steel pipe structure, wherein the foremost end of the multistage dilatation noise elimination air inlet pipeline 1 is provided with a connecting flange 3, the connecting flange 3 is sequentially connected with a flange connecting steel pipe 4, an I-grade noise elimination steel pipe 5, a II-grade noise elimination steel pipe 6 and a III-grade conical noise elimination steel pipe 7; the III-grade conical silencing steel pipe 7 is connected with the silencing tank body 2; an interception net 9 is fixed on the upper part of the inner wall of the outer cylinder 8 of the silencing tank body 2, and a guide plate 10 is fixed below the interception net 9; a tank body bottom plate 11 is fixed at the bottom of the outer cylinder 8; the balance weights 12 of the silencing pot are fixed on the lower part of the outer circumference of the outer cylinder 8 at equal intervals; a drain pipe 13 (shown in fig. 3) is additionally provided; the drain pipe may be connected to the flow sensing device or directly to the drain channel.

The main body material of the silencer is made of structural steel with good corrosion resistance, and is mainly formed by welding various structural steel profiles. The main body of the silencing tank body 2 is composed of an outer cylinder 8 and a tank body bottom plate 11, and is formed by welding steel plates, and angle steels are welded at different height positions in the silencing tank body to be used as reinforcing rib frameworks. The interception net 9 made of prismatic steel plate net, the guide plate 10 made of steel strip, the counterweight 12 of the silencing pot, the metal support, the drain pipe 13 and the like are respectively welded at the corresponding positions of the main body of the silencing pot body 2. The connecting flange 3, the flange connecting steel pipe 4, the I-grade silencing steel pipe 5, the II-grade silencing steel pipe 6, the III-grade conical silencing steel pipe 7 and the like of the multi-stage expansion silencing air inlet pipeline 1 are respectively connected with one another through welding. All pipeline welding seams adopt V-shaped welding seams. When the fluid accumulated in the muffler tank 2 is discharged into the reservoir through the drain pipe 13, the discharge position of the drain pipe needs to be submerged below the liquid level. A flow measuring device can be installed at the rear end of the drain pipe to detect the change of the discharge amount of the geothermal well head. The soil and water pollution caused by liquid such as geothermal brine can be prevented by avoiding directly discharging geothermal fluid into soil around the geothermal well. Four cement weighting block structures are distributed outside the silencing tank body 2 to serve as silencing tank counterweight 12, the structure can effectively reduce and attenuate pipeline vibration and noise transmitted from an external pipeline, and noise transmission along a solid pipeline can be effectively blocked while leakage at the position is avoided.

After the geothermal production liquid enters the input pipeline of the silencer, the pressure and the speed of the geothermal well production liquid are obviously reduced when the geothermal well production liquid enters the silencing tank body 2 through the input pipeline because the drift diameters of all levels of pipelines are gradually expanded; the wide skirt board at the reducing position of each stage of stepped sleeve can also effectively prevent the transmission of high-frequency noise from a front-section pipeline, thereby effectively blocking the transmission of the high-frequency noise through the multistage dilatation noise elimination air inlet pipeline 1. When geothermal production liquid enters the silencing tank body 2 through the last section of steel pipe, a steam and brine mixture flows into the tank body along the direction tangential to the inner wall of the tank body, and the noise level generated by impact can be reduced. The internal space of the silencing tank body 2 can be divided into an upper working area and a lower working area according to specific functions: the upper part is a steam and condensed liquid separation area, when the rising geothermal steam passes through the interception net 9 on the upper part, the flow speed of the steam is reduced to a certain degree, so that the condensable components in the rising steam are condensed into liquid drops and drop down as much as possible. The brine components carried in the geothermal steam discharged from the outlet at the upper part of the silencing tank body 2 are reduced, so that the possibility that the discharged steam is condensed into brine again in the atmosphere and falls to the ground is reduced. Because the brine liquid drops contain silicon dioxide with strong corrosiveness, the damage of the condensate steam to glass windows of nearby buildings and automobile paints can be reduced by reducing the content of the brine steam in the discharged steam.

The utility model discloses a major structure selects the low alloy high strength to wait that the structural steel section welding forms, forms corrosion-resistant protective layer on the metal matrix surface through the alloying of Cu, P, Cr etc to make silencer major structure have higher corrosion resisting property. Although the selected steel has better surface corrosion resistance, the external surface of the exposed metal structure is coated with the corrosion-resistant paint in consideration of the high temperature and the corrosiveness of the geothermal steam fluid, so that the corrosion resistance of the silencer equipment exposed to the corrosive geothermal steam is further improved, and the effective service life of the silencer equipment is effectively prolonged.

Claims

1. A high-efficiency high-temperature geothermal wellhead muffler is characterized in that the muffler is composed of a muffler tank body (2) and a multi-stage expansion muffler inlet pipeline (1) positioned in front of the muffler tank body (2);

the multistage dilatation noise elimination air inlet pipeline adopts a stepped expanding steel pipe structure, wherein the foremost end of the multistage dilatation noise elimination air inlet pipeline (1) is provided with a connecting flange (3), the connecting flange (3) is sequentially connected with a flange connecting steel pipe (4), an I-grade noise elimination steel pipe (5), a II-grade noise elimination steel pipe (6) and a III-grade conical noise elimination steel pipe (7); the III-grade conical silencing steel pipe (7) is connected with the silencing tank body (2); an interception net (9) is fixed on the upper part of the inner wall of an outer cylinder (8) of the silencing tank body (2), and a guide plate 10 is fixed below the interception net (9); a tank body bottom plate (11) is fixed at the bottom of the outer cylinder (8); the lower part of the outer circumference of the outer cylinder (8) is fixed with a balance weight (12) of the silencing pot at equal intervals, and a drain pipe (13) is arranged in addition.

2. The high-efficiency high-temperature geothermal wellhead muffler as recited in claim 1, wherein the muffler is directly connected with a geothermal wellhead pipeline through a flange, and an elastic sealing combination gasket is additionally arranged at the connecting flange.

3. The high efficiency high temperature geothermal wellhead muffler according to claim 1, wherein the intercepting screen is made of a prismatic steel screen.