WO2020233390A1

WO2020233390A1 - Evaporation device for treatment of low-heat-mass coal gas

Info

Publication number: WO2020233390A1
Application number: PCT/CN2020/088354
Authority: WO
Inventors: 树晓荣
Original assignee: 江苏嘉泰蒸发设备股份有限公司
Priority date: 2019-05-20
Filing date: 2020-04-30
Publication date: 2020-11-26
Also published as: CN209940919U

Abstract

Disclosed is an evaporation device for the treatment of low-heat-mass coal gas, the evaporation device comprising a heating furnace and a burner. The burner is arranged on the left side of the heating furnace, a tube-bundle-type integrated module is arranged in the heating furnace, a gas-liquid separator is arranged on the right side of the heating furnace, a filtering structure is arranged above the gas-liquid separator, and a heat recovery structure is arranged between the gas-liquid separator and the heating furnace. The present invention relates to the technical field of the treatment of low-heat-mass coal gas in a steel mill, wherein the-tube-bundle type integrated module is placed in the high-temperature-resistant heating furnace, low-heat-mass coal gas is combusted by a special burner, and heat is then transferred to materials in the tube-bundle-type integrated module and then enters the gas-liquid separator for separation, and the separated low-temperature tail gas and liquid waste are purified by means of the filtering structure and then discharged, which greatly utilizes the residual value of the low-heat-mass coal gas, saves on investment and is environmentally friendly, and the device has a simple structure and rational design.

Description

Evaporation equipment for processing low-calorie coal gas

Technical field

The invention relates to the technical field of low-calorie coal gas treatment in steel plants, in particular to an evaporation device for low-calorie coal gas treatment.

Background technique

If the waste slag and waste gas generated by iron and steel enterprises are not effectively used, they will pollute the land and surrounding environment of the storage site, and the waste gas generated will be discharged into the atmosphere. A large amount of carbon dioxide, carbon monoxide, sulfur dioxide, hydrogen sulfide, etc. pollute the atmosphere and carry a lot of dust. Pollutants are formed in the atmosphere; the waste water discharged from the steel plant carries a large amount of oil and organic matter, which causes pollution of rivers and lakes; the vehicles entering and leaving the steel plant are also the main source of pollution on the surrounding roads.

Steel plants produce a large amount of low-calorie coal gas during the production process, which causes serious pollution to the environment and reduces energy efficiency. Zero-emission or resource utilization usually uses evaporative crystallization equipment. If equipped with a boiler, not only does it occupy a large area, but also It will increase the investment cost. In view of this, in-depth study of the above issues led to this case.

Summary of the invention

In view of the shortcomings of the prior art, the present invention provides an evaporation equipment for processing low-calorie coal gas, which solves the problem that the existing steel mills produce a large amount of low-calorie coal gas during the production process, and zero emissions or resource utilization usually use evaporation. If the crystallization equipment is equipped with a boiler, it will not only occupy a large area, but also increase the investment cost.

In order to achieve the above objectives, the present invention is achieved through the following technical solutions: an evaporation device for processing low-calorie coal gas, including a heating furnace and a burner, the burner being arranged on the left side of the heating furnace, and the heating furnace A tube bundle integrated module is installed, a gas-liquid separator is installed on the right side of the heating furnace, a filter structure is installed above the gas-liquid separator, and a gas-liquid separator is installed between the gas-liquid separator and the heating furnace. Has a heat recovery structure;

The heat recovery structure includes: a heat pipe and a waste water heat transfer part;

The heat conducting pipe is installed between the burner and the heating furnace, and the waste water heat transfer part is installed between the heating furnace and the gas-liquid separator;

The waste water heat transfer part includes: an annular cavity, a connecting pipe, a water storage tank, a water supply pump, and a water supply pipe;

The annular cavity is sleeved on the outside of the tube bundle integrated module, one end of the connecting pipe is connected with the annular cavity, the other end of the connecting pipe is connected with the gas-liquid separator, and the water storage tank is installed Located on the right side of the heating furnace, the water supply pump is installed on the water storage tank, and its water inlet end is in communication with the water storage tank, and one end of the water supply pipe is embedded on the water outlet end of the water supply pump , The other end extends into the heating furnace and communicates with the annular cavity.

Preferably, the filtering structure includes: a support frame, an exhaust gas purification part, and a waste water purification part;

The supporting frame is installed on the right side of the gas-liquid separator, the exhaust gas purification part is installed on the supporting frame, and the waste water purification part is installed on the lower end of the supporting frame and is separated from the gas-liquid The outlet of the device is connected.

Preferably, the exhaust gas purification unit includes: an induced draft fan, an exhaust gas filter box and a dust collection assembly;

The induced draft fan is installed on the supporting frame, and its air inlet end is communicated with the upper exhaust port of the gas-liquid separator, and the exhaust gas filter box is installed on the supporting frame and is located in the On the right side of the induced draft fan, the dust collection assembly is installed in the exhaust filter box.

Preferably, the wastewater purification unit includes: a centrifugal pump, a filter water tank, and a filter screen assembly;

The centrifugal pump is installed on the lower end of the support frame, the filtered water tank is installed on the right side of the centrifugal pump, and the filter screen assembly is installed in the filtered water tank.

Preferably, the dust collection assembly includes: a partition and a dust collection bag;

The partition is embedded in the exhaust filter box, a plurality of circular through holes with the same structure are opened on the partition, and the dust bag is sleeved on the circular through holes.

Preferably, the filter screen assembly includes: a preliminary filter screen and an adsorption filter screen;

The preliminary filter screen is embedded in the filtering water tank, and the adsorption filter screen is embedded in the filtering water tank and is located on the lower side of the preliminary filter screen.

Beneficial effect

The invention provides an evaporation equipment for processing low-calorie coal gas. It has the following beneficial effects: In the evaporation equipment for processing low-calorie coal gas, the tube-bundle integrated module is placed in a high-temperature-resistant heating furnace, and the low-calorie coal gas is burned by a dedicated burner and transferred to the materials in the tube-bundle integrated module. , Enter the gas-liquid separator for separation, and the separated low-temperature tail gas and waste liquid are purified by the filter structure and then discharged, which greatly utilizes the residual value of low-calorie gas, saves investment and is environmentally friendly. This equipment structure Simple and reasonable design, it solves the problem that the existing steel mills produce a large amount of low-calorie gas during the production process, and zero-emission or resource utilization usually use evaporative crystallization equipment. If the boiler is equipped, it will not only occupy a large area, but also increase The question of investment costs.

Description of the drawings

Fig. 1 is a schematic view of the front structure of an evaporation device for processing low-calorie coal gas according to the present invention.

Fig. 2 is a schematic top view of the evaporation equipment for processing low-calorie coal gas according to the present invention.

Figure 3 is a partially enlarged schematic diagram of the evaporation equipment for processing low-calorie coal gas according to the present invention.

In the picture: 1- heating furnace; 2- burner; 3- tube bundle integrated module; 4- gas-liquid separator; 5- heat pipe; 6-annular cavity; 7- connecting pipe; 8- water storage tank; 9- Water supply pump; 10- water supply pipe; 11- support frame; 12- induced draft fan; 13- exhaust filter box; 14- centrifugal pump; 15- filter water tank; 16- partition plate; 17- dust bag; 18- primary filter Net; 19-adsorption filter net.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Through the personnel in the field, connect all the electrical components in this case and their adapted power supply through wires, and should select the appropriate controller according to the actual situation to meet the control requirements. The specific connection and control sequence should refer to the following working principles In the electrical connection, the electrical connection is completed in the order of the electrical components. The detailed connection method is a well-known technology in the field. The following mainly introduces the working principle and process, and does not explain the electrical control.

Example: As can be seen from figures 1-3 of the specification, this case is a low-calorie gas processing evaporation equipment, including a heating furnace 1 and a burner 2. The burner 2 is installed on the left side of the heating furnace 1, and the heating furnace 1 is installed Equipped with a tube bundle integrated module 3, a gas-liquid separator 4 is installed on the right side of the heating furnace 1, a filtering structure is installed above the gas-liquid separator 4, and a heat recovery is installed between the gas-liquid separator 4 and the heating furnace 1. structure;

The above heat recovery structure includes: the heat pipe 5 and the waste water heat transfer part, the positional relationship and connection relationship are as follows:

The heat pipe 5 is installed between the burner 2 and the heating furnace 1, and the waste water heat transfer part is installed between the heating furnace 1 and the gas-liquid separator 4;

The above-mentioned waste water heat transfer part includes: an annular cavity 6, a connecting pipe 7, a water storage tank 8, a water supply pump 9 and a water supply pipe 10. The positional relationship and connection relationship are as follows:

The annular cavity 6 is sleeved on the outside of the tube bundle integrated module 3, one end of the connecting pipe 7 is connected with the annular cavity 6, the other end of the connecting pipe 7 is connected with the gas-liquid separator 4, and the water storage tank 8 is installed on the right side of the heating furnace 1. , The water supply pump 9 is installed on the water storage tank 8, and its water inlet end is connected to the water storage tank 8. One end of the water supply pipe 10 is embedded in the water outlet end of the water supply pump 9, and the other end extends into the heating furnace 1, and The annular cavity 6 communicates with each other.

It can be seen from the above that the waste water in the water storage tank 8 is injected into the annular cavity 6 through the water supply pipe 10 through the water supply pump 9, and the low-calorie gas is supplied to the burner 2 for combustion, and the heat generated by the combustion is injected into the annular cavity 6 In the cavity, the waste water that has entered the annular cavity 6 is heated, the waste water and low-quality gas are fully utilized for energy transfer, and the materials in the annular cavity 6 in the heating furnace 1 are preheated and passed through the connecting pipe 7 The water-gas mixture in the annular cavity is introduced into the gas-liquid separator 4 for gas-liquid separation.

It can be seen from the above general that, in the evaporation equipment for processing low-calorie coal gas, the tube-bundle integrated module 3 is placed in the high-temperature-resistant heating furnace 1, and at the same time, the low-calorie coal gas is burned by a dedicated burner 2 and transfers heat to the tube-bundle integrated module 3. After entering the gas-liquid separator 4 for separation, the separated low-temperature tail gas and waste liquid are purified by the filtering structure and then discharged, which greatly utilizes the residual value of low-calorie gas and saves investment and Environmental protection, the equipment has simple structure and reasonable design.

As a preferred solution, further, the filtering structure includes: a support frame 11, an exhaust gas purification part and a waste water purification part, and the positional relationship and connection relationship are as follows:

The supporting frame 11 is installed on the right side of the gas-liquid separator 4, the tail gas purification part is installed on the supporting frame 11, and the waste water purification part is installed on the lower end of the supporting frame 11 and communicates with the water outlet of the gas-liquid separator 4.

As a preferred solution, furthermore, the exhaust gas purification unit includes: an induced draft fan 12, an exhaust gas filter box 13, and a dust collection assembly. The positional relationship and connection relationship are as follows:

The induced draft fan 12 is installed on the support frame 11, and its air inlet end is connected with the upper exhaust port of the gas-liquid separator 4. The exhaust gas filter box 13 is installed on the support frame 11 and is located on the right side of the induced draft fan 12, The dust assembly is installed in the tail gas filter box 13. When in use, the induced draft fan 12 extracts the gas generated in the gas-liquid separator 4 and transports it to the tail gas filter box 13 for filtering.

As a preferred solution, furthermore, the waste water purification unit includes: a centrifugal pump 14, a filter water tank 15, and a filter screen assembly. The positional relationship and the connection relationship are as follows:

The centrifugal pump 14 is installed on the lower end of the support frame 11, the filter water tank 15 is installed on the right side of the centrifugal pump 14, and the filter screen assembly is installed in the filter water tank 15. When in use, the centrifugal pump 14 removes the gas in the gas-liquid separator 4 The separated wastewater is injected into the filtering water tank 15, and a certain pressure is applied to the wastewater, and the wastewater is filtered.

As a preferred solution, further, the dust collection assembly includes: a partition 16 and a dust collection bag 17, the positional relationship and connection relationship of which are as follows;

The partition 16 is embedded in the tail gas filter box 13, and a plurality of circular through holes with the same structure are opened on the partition 16, and the dust bag 17 is sleeved on the circular through holes. When in use, the gas-liquid separator 4 separates The exhaust gas is led out into the dust removal box by the induced draft fan 12, and is discharged after being filtered through the dust bag 17 on the partition 16 under the wind pressure of the induced draft fan 12.

As a preferred solution, furthermore, the filter assembly includes: a preliminary filter 18 and an adsorption filter 19, the positional relationship and connection relationship of which are as follows:

The primary filter screen 18 is embedded in the filter water tank 15, and the adsorption filter screen 19 is embedded in the filter water tank 15 and is located under the primary filter screen 18. When in use, it is drawn into the filter water tank 15 by the centrifugal pump 14. And under the action of water pressure, the scum in the wastewater is cleaned through the primary filter screen 18, and then the calcium and magnesium ions in the wastewater are adsorbed through the adsorption filter screen 19.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between. Moreover, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes Other elements of, or also include elements inherent to this process, method, article or equipment. Without more restrictions. The sentence "including an element defined by ... does not exclude the existence of other identical elements in the process, method, article, or equipment including the element."

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. And variations, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

An evaporation equipment for processing low-calorie coal gas, comprising a heating furnace (1) and a burner (2), characterized in that the burner (2) is installed on the left side of the heating furnace (1), and the heating A tube bundle integrated module (3) is installed in the furnace (1), a gas-liquid separator (4) is installed on the right side of the heating furnace (1), and a filter is installed above the gas-liquid separator (4). Structure, a heat recovery structure is installed between the gas-liquid separator (4) and the heating furnace (1);

The heat recovery structure includes: a heat pipe (5) and a waste water heat transfer part;

The heat pipe (5) is installed between the burner (2) and the heating furnace (1), the waste water heat transfer part is installed on the heating furnace (1) and the gas-liquid separation Between (4);

The waste water heat transfer part includes: an annular cavity (6), a connecting pipe (7), a water storage tank (8), a water supply pump (9) and a water supply pipe (10);

The annular cavity (6) is sleeved on the outside of the tube bundle type integrated module (3), one end of the connecting pipe (7) is communicated with the annular cavity (6), and the other end of the connecting pipe (7) In communication with the gas-liquid separator (4), the water storage tank (8) is installed on the right side of the heating furnace (1), and the water supply pump (9) is installed on the water storage tank (8) The water inlet end is connected to the water storage tank (8), one end of the water supply pipe (10) is embedded in the water outlet end of the water supply pump (9), and the other end extends into the heating furnace ( 1) inside and communicated with the annular cavity (6).
The evaporation equipment for treating low-calorie coal gas according to claim 1, wherein the filtering structure comprises: a support frame (11), an exhaust gas purification part and a waste water purification part;

The supporting frame (11) is installed on the right side of the gas-liquid separator (4), the exhaust gas purification part is installed on the supporting frame (11), and the waste water purification part is installed on the supporting frame (11) The lower end is connected with the water outlet end of the gas-liquid separator (4).
The evaporation equipment for processing low-calorie coal gas according to claim 2, wherein the tail gas purification unit comprises: an induced draft fan (12), a tail gas filter box (13) and a dust collection assembly;

The induced draft fan (12) is installed on the support frame (11), and its air inlet end is in communication with the upper exhaust port of the gas-liquid separator (4), and the tail gas filter box (13) is installed It is arranged on the supporting frame (11) and located on the right side of the induced draft fan (12), and the dust collection assembly is arranged in the exhaust gas filter box (13).
The evaporation equipment for processing low-calorie coal gas according to claim 2, characterized in that the waste water purification part comprises: a centrifugal pump (14), a filtered water tank (15) and a filter screen assembly;

The centrifugal pump (14) is installed on the lower end of the support frame (11), the filter water tank (15) is installed on the right side of the centrifugal pump (14), and the filter assembly is installed on the Filter inside the water tank (15).
The evaporation equipment for processing low-calorie coal gas according to claim 3, characterized in that, the dust collecting assembly comprises: a partition (16) and a dust collecting bag (17);

The partition (16) is embedded in the exhaust filter box (13), a plurality of circular through holes with the same structure are opened on the partition (16), and the dust bag (17) is sleeved in the The circular through hole.
The evaporation equipment for processing low-calorie coal gas according to claim 4, wherein the filter assembly includes: a preliminary filter (18) and an adsorption filter (19);

The preliminary filter screen (18) is embedded in the filter water tank (15), and the adsorption filter screen (19) is embedded in the filter water tank (15) and is located in the preliminary filter screen ( 18) Underside.