CN217283436U

CN217283436U - Automatic clearance electric heater unit

Info

Publication number: CN217283436U
Application number: CN202220826479.4U
Authority: CN
Inventors: 李占虎; 李俊; 刘勇; 梁田明; 张龙生; 肖淑国
Original assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Northwest Oil Field Co
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-08-23
Anticipated expiration: 2032-04-11

Abstract

The utility model provides an automatic cleaning electric heating device, which relates to the technical field of chlor-alkali industrial production and comprises a heating tube bundle and a purging tube, wherein one end of the heating tube bundle is fixed on a flange plate; the heating tube bundle consists of a plurality of heating tubes which are uniformly arranged, and the purging tube is arranged in the center of the heating tube bundle and is positioned on the central axis of the heating tube bundle; the purging pipe is communicated with an instrument air pipe line; the automatic cleaning electric heating device is characterized by also comprising a control system, wherein the control system is used for receiving and sending signals and controlling the automatic cleaning electric heating device to work; the utility model realizes the stable and suitable reaction temperature for the absorption oxidation tower under the existing equipment condition, and simultaneously reduces the risk of burning out the electric heating tube bundle caused by the accumulation of suspended matters and coking; the blowing device is reasonable and standard in design, and the safety of field operation can be ensured.

Description

Automatic clearance electric heater unit

Technical Field

The utility model relates to a chlor-alkali industrial production technical field, concretely relates to automatic clearance electric heater unit.

Background

Sulfur is an important chemical product, mainly from oil refineries and natural gas purification plants. The sulfur recovery not only can reduce the pollution to the environment and ensure the safety of natural gas transportation and storage, but also has certain economic benefit. At present, a part of natural gas purification plants adopt a sulfur recovery device to treat acid gas in incoming feed gas, and recover gaseous sulfur simple substances by improving the inlet temperature of a reactor and the temperature of each stage of reactor, so as to produce sulfur products meeting the environmental protection requirement. The main equipment absorption oxidation tower is responsible for the reaction of acid gas and medicament, and the sulfur electric heater provides suitable reaction temperature for the absorption oxidation tower, and the stability of temperature directly influences the product quality and the continuous operation of the device.

In the production operation, a large amount of sulfur suspended matters are generated in the reaction of the sulfur solution, and the suspended matters are continuously accumulated on the heating tube bundle in the sedimentation process, so that the heating tube bundle is damaged by short circuit due to heating and coking of the sulfur on the surface of the heating tube bundle. Not only delaying production, but also causing great economic loss. Therefore, the sulfur suspension needs to be cleaned periodically to prevent the accumulation of the suspension.

Chinese patent application No. CN202022146808.4 discloses a sulfur recovery tail gas treatment system with a heat exchanger for preventing soot deposition blocking, which comprises a tail gas preheater, a tail gas heater, a tail gas incinerator, a waste heat boiler, a cooler and a desulfurization device; the method comprises the following steps that the sulfur-containing tail gas enters a tail gas incinerator after exchanging heat with flue gas through a tail gas preheater and a tail gas heater, high-temperature flue gas generated by the tail gas incinerator sequentially enters the tail gas heater and the tail gas preheater after passing through a waste heat boiler to exchange heat with the sulfur-containing tail gas, the flue gas of the tail gas preheater is cooled through a cooler and then enters desulfurization equipment, and the tail gas preheater is a heat exchanger capable of preventing dust deposition and blocking; the device can carry out the heat exchange with tail gas processing system's flue gas and tail gas in preventing that the deposition blocks up the heat exchanger, can collect the dust that the flue gas mix with and the crystallization salt that the cooling is appeared at the in-process of heat transfer and regularly discharge, avoids dust and crystallization salt to adhere to the pipe wall at the heat exchange tube because of unable discharge, leads to heat exchange efficiency to reduce. But the method is suitable for the scene of tail gas treatment, the generated sulfur suspended matters can not be cleaned in the reaction process, and the reaction process can still be influenced.

Chinese patent with application number CN201910579914.0 discloses a device for high-temperature and high-pressure reaction in user chemical industry, which discloses an ash removal mechanism and a blowing device, wherein an air inlet is communicated with an air blower and a combustion space, and an opening of the air inlet in the combustion space is located at the lower end of a filter screen. The air blower blows in the combustion space through the air inlet after pressurizing the air, provides sufficient oxygen for the burning in the combustion space, makes the burning more high-efficient, and the dust in the filter screen can be blown to the wind pressure moreover, prevents that the filter screen from blockking up. The blowing device of the device is arranged at the lower end of the filter screen and is suitable for the production scene of solid reactants.

The suspended solid that exists to sulphur recovery unit in tower river oil field light hydrocarbon recovery production line piles up on sulphur electric heater heating tube bank, and along with the extension of operating time, the suspended solid piles up constantly by heating, coking on heating tube bank, finally leads to the problem that heating tube bank local heating short circuit burns out, need improve current heating tube bank, makes it can clear up the accumulational suspended solid in surface automatically, improves heating tube bank's life.

Disclosure of Invention

Based on above problem, an object of the utility model is to provide an automatic clearance electric heater unit.

In order to achieve the above object, the utility model provides a following technical scheme:

an automatic cleaning electric heating device comprises a heating tube bundle and a purging tube, wherein one end of the heating tube bundle is fixed on a flange;

the heating tube bundle is composed of a plurality of heating tubes which are uniformly arranged, the heating tubes are circumferentially arranged around the central axis of the flange plate, and the purging tube is arranged in the center of the heating tube bundle and is positioned on the central axis of the heating tube bundle; the purging pipe is communicated with an instrument air pipe line; the instrument air pipeline is used for conveying factory instrument air to the blowing pipe, and the blowing pipe blows air to the heating pipe bundle to clean suspended matters on the periphery of the heating pipe bundle;

the automatic cleaning electric heating device is characterized by further comprising a control system, wherein the control system is used for receiving and sending signals and controlling the automatic cleaning electric heating device to work.

Preferably, a plurality of nozzles are distributed on the surface of the purging pipe. The nozzles are uniformly distributed on the surface of the purging pipe, so that the instrument wind can be uniformly distributed around the heating pipe bundle through the nozzles.

Preferably, a temperature sensor is fixed on the surface of the heating tube bundle. The temperature sensor is used for monitoring the temperature of the surface of the heating tube bundle and the surrounding medium, and transmitting monitoring data to the control system, a temperature alarm program is preset on the control system, and if the monitoring data of the temperature sensor exceeds the alarm temperature, the control system starts protection programs such as interlocking power-off and the like.

Preferably, the temperature sensor is a thermal resistor.

Preferably, the automatic cleaning electric heating device further comprises a plurality of fixed sieve pore partition plates, a plurality of through holes are formed in the sieve pore partition plates, and the heating pipe penetrates through the through holes and is fixedly clamped on the fixed sieve pore partition plates. The fixed sieve mesh partition plate is used for fixing the heating tube bundle, so that the heating tube bundle is prevented from displacement, and the medium passing performance is increased.

Preferably, the fixed mesh baffles are distributed at 1/2, 1/4, and 1/8 where the heating tube bundle is away from the flange.

Preferably, a check valve and an electromagnetic valve are arranged on the instrument air pipeline, and the check valve is arranged between the purging pipe and the electromagnetic valve. The check valve is used for preventing the medium in the equipment body from flowing backwards, and the electromagnetic valve can control the opening and closing of the instrument air pipeline, namely the opening and closing of the air blowing and the duration of the air blowing.

Preferably, the automatic cleaning electric heating device further comprises an explosion-proof junction box, and the explosion-proof junction box is fixed at one end, far away from the heating tube bundle, of the flange plate. The explosion-proof junction box is positioned outside the flange plate, and carries out explosion-proof sealing treatment on connecting wires such as an AC380V power wire and the like introduced from the outside and the joint of the connecting wires and the electric heating device, thereby meeting the requirement of explosion-proof grade on an industrial field.

Compared with the prior art, the utility model discloses there is following advantage:

the utility model provides a pair of automatic clearance electric heater unit, include heating tube bank and sweep the pipe, sweep the pipe setting and be in heating tube bank central authorities just are located on heating tube bank's the axis, promptly the heating pipe centers on sweep the pipe and distribute, obtain ultimate heating tube bank. The blowing pipe is communicated with the instrument air pipe line, the instrument air pipe line conveys factory instrument air to the blowing pipe, the blowing pipe blows air to the heating pipe bundle, and the heating pipe bundle and the blowing pipe are located in a reaction liquid environment, so the air blown out from the blowing pipe pushes the liquid around the heating pipe bundle to flow and roll, the suspended matters at the periphery of the heating pipe bundle are cleaned, and the suspended matters are prevented from being deposited on the surface of the heating pipe bundle.

By utilizing the device, the stable and proper reaction temperature is provided for the absorption oxidation tower under the condition of the existing equipment, and the risk of burning the electric heating tube bundle due to accumulation of suspended matters and coking is reduced; the purging device is reasonable and standard in design, can ensure the safety of field operation, and is suitable for the sulfur recovery device with more suspended matters.

Drawings

Fig. 1 is a schematic structural view of an automatic cleaning electric heating device of the present invention;

reference numerals:

1-heating a tube bundle; 2-a purge tube; 3-a flange plate; 4-instrument wind pipeline; 5-a temperature sensor;

6-fixing a sieve pore partition plate; 7-a check valve; 8-an electromagnetic valve; 9-explosion-proof junction box.

Detailed Description

In order to make the purpose and technical solution of the embodiments of the present invention clearer, the embodiments of the present invention will be combined with the following, which is to clearly and completely describe the technical solution of the present invention.

In the description of the present application, it is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. indicate orientations or positional relationships based on those illustrated in the drawings, which are merely for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the present application.

As shown in fig. 1, the utility model provides an automatic cleaning electric heating device, which comprises a heating tube bundle 1 with one end fixed on a flange 3 and a purging tube 2; an explosion-proof junction box 9 is fixed at one end, far away from the heating tube bundle 1, of the flange 3, connecting wires such as an AC380V power line and a data line led from the outside are connected with the heating tube bundle 1 at the other side through a through hole in the flange 3, and the explosion-proof junction box 9 is located outside the flange 3, so that the connecting wires can be accommodated, and explosion-proof sealing treatment can be performed on the connecting wires and the junction of the electric heating device, the explosion-proof grade requirement of an industrial field is met, and the safety of field operation can be ensured. The automatic cleaning electric heating device is characterized by further comprising a control system, wherein the control system is used for receiving and sending signals and controlling the automatic cleaning electric heating device to work.

The heating tube bundle 1 is composed of a plurality of heating tubes which are uniformly arranged, and the heating tubes can generate heat after being electrified to heat surrounding liquid, so that stable and proper reaction temperature is provided for the absorption oxidation tower under the condition of the existing equipment. The heating pipes are arranged circumferentially around the central axis of the flange 3, and the purging pipe 2 is arranged in the center of the heating pipe bundle 1 and is positioned on the central axis of the heating pipe bundle 1; the heating tubes are thus arranged around the purge tubes 2, resulting in the final heating tube bundle 1. And a plurality of nozzles are distributed on the surface of the purging pipe 2.

Sweep pipe 2 and instrument wind pipeline 4 and be linked together, instrument wind pipeline 4 carries the instrument wind of mill to sweeping pipe 2, sweeps pipe 2 and can be with instrument wind evenly distributed around heating tube bank 1 through the nozzle, because heating tube bank 1 with sweep pipe 2 and be located the reaction liquid environment, consequently promote from sweeping the wind that blows out in the pipe 2 liquid around the heating tube bank 1 flows and rolls, clear up the peripheral suspended solid of heating tube bank 1, prevents that the suspended solid deposit from heating tube bank 1 surface, has reduced because of the suspended solid piles up the risk that electric heating tube bank 1 that the coking caused burns out.

The surface of the heating tube bundle 1 is fixed with at least one temperature sensor 5, and the number of the temperature sensors 5 is at least one. The temperature sensor 5 is used for monitoring the temperature of the surface of the heating tube bundle 1 and the surrounding medium, transmitting monitoring data to the control system, and presetting a temperature alarm program on the control system, if the monitoring data of the temperature sensor 5 exceeds the alarm temperature, the control system starts protection programs such as interlocking power-off, and stops working to perform reason troubleshooting and maintenance. The temperature sensor 5 is a thermal resistor, a thermocouple or other type.

The automatic cleaning electric heating device further comprises a plurality of fixed sieve mesh partition plates 6, a plurality of through holes are formed in the sieve mesh partition plates, and the heating pipe penetrates through the through holes and is fixedly clamped on the fixed sieve mesh partition plates 6. The fixed sieve mesh partition plates 6 are used for fixing the heating tube bundle 1, preventing the heating tube bundle 1 from displacement and increasing the medium passing performance. When the number of the fixed mesh partition plates 6 is three, the fixed mesh partition plates 6 are generally distributed at 1/2, 1/4 and 1/8 of the heating tube bundle 1 away from the flange 3, and can fix the shape of the heating tube bundle 1. In addition, other numbers of stationary screen partitions 6 are possible.

The instrument air pipeline 4 is further provided with a check valve 7 and an electromagnetic valve 7, the check valve 7 is used for preventing media in the equipment body from flowing backwards, and the check valve 7 is arranged between the purging pipe 2 and the electromagnetic valve 7. Because automatic clearance electric heater unit is located liquid environment, consequently, the liquid medium in the environment easily gets into in instrument wind pipeline 4 through sweeping pipe 2 to influence automatic clearance electric heater unit work, can cause the device to damage even. The check valve 7 is added, if backflow occurs, the backflow area of the liquid medium can be controlled in the pipeline between the purging pipes 2, and damage to the equipment can be prevented. The solenoid valve 7 can control the opening and closing of the instrument wind pipeline 4, namely the opening and closing of the wind and the duration of the wind. Through a control system, the electromagnetic valve 7 is generally set to be opened every 30 seconds and closed after working for 10 seconds, and the circulation work is continuously carried out.

The above description is only a few embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, many variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.

Claims

1. The utility model provides an automatic clearance electric heater unit which characterized in that:

comprises a heating tube bundle and a purging tube, one end of the heating tube bundle is fixed on a flange plate;

the heating tube bundle consists of a plurality of heating tubes which are uniformly arranged, and the purging tube is arranged in the center of the heating tube bundle and is positioned on the central axis of the heating tube bundle; the purging pipe is communicated with an instrument air pipe line;

2. An automatic cleaning electric heating apparatus as claimed in claim 1, wherein:

and a plurality of nozzles are distributed on the surface of the purging pipe.

3. An automatic cleaning electric heating apparatus as claimed in claim 1, wherein:

and a temperature sensor is fixed on the surface of the heating tube bundle.

4. An automatic cleaning electric heating apparatus as claimed in claim 3, wherein: the temperature sensor is a thermal resistor.

5. An automatic cleaning electric heating apparatus as claimed in claim 1, wherein:

the automatic cleaning electric heating device further comprises a plurality of fixed sieve mesh partition plates, a plurality of through holes are formed in the sieve mesh partition plates, and the heating pipe penetrates through the through holes and is fixedly clamped on the fixed sieve mesh partition plates.

6. An automatic cleaning electric heating apparatus as claimed in claim 5, wherein:

the fixed mesh baffles are distributed at 1/2, 1/4 and 1/8 where the heating tube bundle is far away from the flange.

7. An automatic cleaning electric heating apparatus as claimed in claim 1, wherein:

and a check valve and an electromagnetic valve are arranged on the instrument air pipeline, and the check valve is arranged between the purging pipe and the electromagnetic valve.

8. An automatic cleaning electric heating apparatus as claimed in claim 1, wherein:

the automatic cleaning electric heating device further comprises an explosion-proof junction box, and the explosion-proof junction box is fixed at one end, far away from the heating tube bundle, of the flange plate.