Evaporation kettle for sewage treatment

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to an evaporation kettle for sewage treatment, which comprises a liquid storage tank and an evaporation mechanism, the evaporation mechanism comprises a heating chamber, and a jacket is fixedly connected outside the heating chamber; the outer wall of the jacket is fixedly connected with a saturated steam inlet pipe; the bottom of the jacket is fixedly connected with a condensate water conveying pipe; a circulating pipe is fixedly connected to the side wall of the bottom of the liquid storage tank; the circulating pipe is sequentially communicated with a circulating pump and a heat exchanger; the tail end of the circulating pipe is fixedly connected to the side wall of the liquid storage tank; the heat exchanger is fixedly connected with a condensate water outlet pipe; the saturated steam inlet pipe is fixedly connected with a condensate water inlet pipe; the condensate water inlet pipe is communicated with the heat exchanger; the problems that high-pressure saturated steam needed by sewage treatment equipment is combusted through a boiler and the like to generate saturated steam, the cost is high, energy loss is large, energy of the sewage treatment equipment needs to be discharged, discharged secondary heat is not fully utilized, and huge energy waste is caused are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, in particular to an evaporating kettle for sewage treatment. Background Art

[0002] All large-scale landfill enterprises need to use professional sewage treatment equipment to treat sewage before discharging it. The current sewage treatment equipment process requires external direct supply of saturated steam as a heat source to heat the sewage and evaporate the water in the sewage, so as to achieve the purpose of emission reduction.

[0003] In the prior art, the high-pressure saturated steam required by sewage treatment equipment is produced by boiler combustion and other methods, which is costly and causes large energy losses. In addition, the energy of the sewage treatment equipment itself needs to be discharged, and the discharged secondary heat is not fully utilized, resulting in huge energy waste. Therefore, the utility model provides an evaporator for sewage treatment. Utility Model Content

[0004] In order to make up for the shortcomings of the existing technology, the problem of high cost and large energy loss caused by the high-pressure saturated steam required by sewage treatment equipment through boiler combustion and other methods is solved, and the energy of the sewage treatment equipment itself needs to be discharged, and the discharged secondary heat is not fully utilized, resulting in huge energy waste.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an evaporator for sewage treatment described in the utility model comprises a liquid storage tank and an evaporation mechanism, the evaporation mechanism comprises a heating chamber, a jacket is fixedly connected to the outside of the heating chamber; a saturated steam inlet pipe is fixedly connected to the outer wall of the jacket; a condensate transport pipe is fixedly connected to the bottom of the jacket; a circulation pipe is fixedly connected to the side wall of the bottom of the liquid storage tank; the circulation pipe is connected to a circulation pump and a heat exchanger in sequence; the end of the circulation pipe is fixedly connected to the side wall of the liquid storage tank; a condensate outlet pipe is fixedly connected to the heat exchanger; a condensate inlet pipe is fixedly connected to the saturated steam inlet pipe; the condensate inlet pipe is connected to the heat exchanger; a steam trap is installed on the condensate inlet pipe; one end of the condensate transport pipe is connected to the condensate inlet pipe; and a steam trap is installed on the condensate transport pipe.

[0006] Preferably, a residual liquid outlet pipe and a support frame are fixedly connected to the bottom of the jacket, and the residual liquid outlet pipe passes through the jacket and is connected to the heating chamber; a sewage transport pipe is fixedly connected to the top of the heating chamber; one end of the sewage transport pipe passes through the transport pump and is fixedly connected to the top of the liquid storage tank, and the sewage transport pipe extends into the interior of the liquid storage tank; the transport pump is fixedly connected to the top of the liquid storage tank.

[0007] Preferably, a motor box is fixedly connected to the top of the heating chamber; the motor box drives a rotating rod; the rotating rod passes through the top of the heating chamber; a pair of stirring plates are fixedly connected to the rotating rod; a group of scrapers are fixedly connected to the bottom end of the rotating rod, and the scrapers are in contact with the inner wall of the bottom of the heating chamber.

[0008] Preferably, a baffle is fixedly connected to the inner wall of the heating chamber, and the baffle is located on the stirring plate; a diversion port is opened on the baffle.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The utility model discloses an evaporator for sewage treatment, which uses a heat exchanger to preheat low-temperature sewage using high-temperature condensed water generated in a saturated steam inlet pipe, thereby increasing the initial temperature of sewage during sewage treatment, improving treatment efficiency, and at the same time increasing heat source utilization and reducing energy consumption.

[0011] 2. The utility model discloses an evaporator for sewage treatment, which uses the high-temperature condensed water generated in the jacket through a heat exchanger to preheat the low-temperature sewage, and reutilizes the heat discharged from the evaporation mechanism, thereby increasing the initial temperature of the sewage during sewage treatment, improving the treatment efficiency, and reducing the energy demand of the sewage evaporation mechanism.

[0012] 3. The utility model discloses an evaporator for sewage treatment, which stirs sewage by a stirring plate to make sewage heating more uniform and improve the evaporation rate of sewage treatment. At the same time, a scraper scrapes the bottom of the heating chamber to prevent residue from adhering to the inner wall of the heating chamber and reducing the heating efficiency, and is also conducive to the discharge of residue and residual liquid.

[0013] 4. The evaporator for sewage treatment described in the utility model blocks and diverts the sewage entering the heating chamber through the baffle plate, thereby preventing the energy of the sewage impact from causing damage to the evaporation mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model will be further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 is a front cross-sectional view of the evaporation mechanism;

[0017] In the figure: 1. liquid storage tank; 11. transport pump; 12. circulation pipe; 13. circulation pump; 2. jacket; 21. support frame; 22. saturated steam inlet pipe; 221. condensate inlet pipe; 222. steam trap; 23. condensate transport pipe; 24. residual liquid outlet pipe; 3. heating chamber; 31. sewage transport pipe; 32. motor box; 321. rotating rod; 322. stirring plate; 323. scraper; 33. baffle; 4. heat exchanger; 41. condensate outlet pipe. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] Embodiment 1

[0020] like Figure 1 to Figure 2 As shown, an evaporator for sewage treatment described in an embodiment of the utility model comprises a liquid storage tank 1 and an evaporation mechanism, wherein the evaporation mechanism comprises a heating chamber 3, the heating chamber 3 is fixedly connected to a jacket 2; a saturated steam inlet pipe 22 is fixedly connected to the outer wall of the jacket 2; a condensate transport pipe 23 is fixedly connected to the bottom of the jacket 2; a circulation pipe 12 is fixedly connected to the bottom side wall of the liquid storage tank 1; the circulation pipe 12 is sequentially connected to a circulation pump 13 and a heat exchanger 4; the end of the circulation pipe 12 is fixedly connected to the side wall of the liquid storage tank 1; a condensate outlet pipe 41 is fixedly connected to the heat exchanger 4; a condensate inlet pipe 221 is fixedly connected to the saturated steam inlet pipe 22; the condensate inlet pipe 221 is connected to the heat exchanger 4; a steam trap 222 is installed on the condensate inlet pipe 221; one end of the condensate transport pipe 23 is connected to the condensate The inlet pipe 221 is connected; a steam trap 222 is installed on the condensate transport pipe 23; when working, the sewage in the liquid storage tank 1 circulates in the heat exchanger 4 and the liquid storage tank 1 through the circulation pipe 12 under the action of the circulation pump 13; the saturated steam enters the jacket 2 to heat and evaporate the sewage in the heating chamber 3, and the condensate generated by the saturated steam enters the condensate inlet pipe 221 through the condensate transport pipe 23 under the action of the steam trap 222, and then enters the heat exchanger 4 to exchange heat with the low-temperature sewage; the high-temperature condensate in the saturated steam inlet pipe 22 enters the heat exchanger 4 through the condensate inlet pipe 221 under the action of the steam trap 222 to exchange heat with the low-temperature sewage, and the heat exchanger 4 is used to increase the initial temperature of the sewage during sewage treatment, thereby improving the treatment efficiency, while also improving the utilization rate of the heat source and reducing energy consumption.

[0021] A residual liquid outlet pipe 24 and a support frame 21 are fixedly connected to the bottom of the jacket 2, and the residual liquid outlet pipe 24 passes through the jacket 2 and is connected to the heating chamber 3; a sewage transport pipe 31 is fixedly connected to the top of the heating chamber 3; one end of the sewage transport pipe 31 passes through the transport pump 11 and is fixedly connected to the top of the liquid storage tank 1, and the sewage transport pipe 31 extends into the interior of the liquid storage tank 1; the transport pump 11 is fixedly connected to the top of the liquid storage tank 1; when working, the sewage in the liquid storage tank 1 enters the heating chamber 3 through the sewage transport pipe 31 under the action of the transport pump 11, and saturated steam is transported from the saturated steam inlet pipe 22 into the jacket 2. The high-temperature condensed water generated when the saturated steam heats the sewage is transported through the condensed water transport pipe 23 under the action of the steam trap 222, and the residual liquid remaining after the sewage evaporates is sent to post-treatment through the residual liquid outlet pipe 24.

[0022] Furthermore, a temperature sensor is provided in the liquid storage tank 1 to control the opening of the transport pump 11 by setting a certain temperature, and a liquid level sensor is provided in the heating chamber 3 to control the closing of the transport pump 11 by setting a certain liquid level height.

[0023] Embodiment 2

[0024] like Figure 1 to Figure 2 As shown, on the basis of Example 1, a motor box 32 is fixedly connected to the top of the heating chamber 3; the motor box 32 drives a rotating rod 321; the rotating rod 321 passes through the top of the heating chamber 3; a pair of stirring plates 322 are fixedly connected to the rotating rod 321; a group of scrapers 323 are fixedly connected to the bottom end of the rotating rod 321, and the scrapers 323 are in contact with the inner wall of the bottom of the heating chamber 3; during operation, when saturated steam evaporates sewage, the motor drives the rotating rod 321 to rotate, and the rotating rod 321 drives the stirring plate 322 to stir the sewage, so that the sewage is heated more evenly and the evaporation rate of sewage treatment is improved. At the same time, the rotating rod 321 drives the scraper 323 to rotate to scrape the bottom of the heating chamber 3 to prevent residue from adhering to the inner wall of the heating chamber 3, reducing the heating efficiency, and at the same time facilitating the discharge of residue and residual liquid.

[0025] Embodiment 3

[0026] like Figure 1 to Figure 2As shown, on the basis of Example 1 and Example 2, a motor box 32 is fixedly connected to the top of the heating chamber 3; the motor box 32 drives a rotating rod 321; the rotating rod 321 passes through the top of the heating chamber 3; a pair of stirring plates 322 are fixedly connected to the rotating rod 321; a group of scrapers 323 are fixedly connected to the bottom end of the rotating rod 321, and the scrapers 323 are in contact with the inner wall of the bottom of the heating chamber 3; during operation, when saturated steam evaporates sewage, the motor drives the rotating rod 321 to rotate, and the rotating rod 321 drives the stirring plate 322 to stir the sewage, so that the sewage is heated more evenly and the evaporation rate of sewage treatment is improved. At the same time, the rotating rod 321 drives the scraper 323 to rotate to scrape the bottom of the heating chamber 3 to prevent residue from adhering to the inner wall of the heating chamber 3, reducing the heating efficiency, and at the same time facilitating the discharge of residue and residual liquid.

[0027] A sewage treatment process, the method is applicable to the above-mentioned sewage treatment evaporator, the method comprises the following steps:

[0028] S1: The sewage in the liquid storage tank 1 enters the heating chamber 3 through the sewage transportation pipe 31 under the action of the transportation pump 11; the sewage in the liquid storage tank 1 circulates in the heat exchanger 4 and the liquid storage tank 1 through the circulation pipe 12 under the action of the circulation pump 13;

[0029] S2: Saturated steam enters the jacket 2 to heat and evaporate the sewage in the heating chamber 3. The condensed water generated by the saturated steam enters the condensed water inlet pipe 221 through the condensed water transport pipe 23 under the action of the steam trap 222, and then enters the heat exchanger 4 to exchange heat with the low-temperature sewage. The high-temperature condensed water in the saturated steam inlet pipe 22 enters the heat exchanger 4 through the condensed water inlet pipe 221 under the action of the steam trap 222 to exchange heat with the low-temperature sewage.

[0030] S3: The sewage preheated to a certain temperature enters the heating chamber 3 through the sewage transport pipe 31 for evaporation under the action of the transport pump 11, and the sewage residual liquid is finally discharged through the residual liquid outlet pipe 24 and sent to post-processing.

[0031] Working principle: The sewage in the liquid storage tank 1 enters the heating chamber 3 through the sewage transport pipe 31 under the action of the transport pump 11, and the baffle 33 blocks and diverts the sewage entering the heating chamber 3. When the sewage reaches the set height, the liquid level sensor controls the pump to be closed, and saturated steam is transported from the saturated steam inlet pipe 22 into the jacket 2. When the saturated steam evaporates the sewage, the motor box 32 drives the rotating rod 321 to rotate, and the rotating rod 321 drives the stirring plate 322 to stir the sewage. At the same time, the rotating rod 321 drives the scraper 323 to rotate to scrape the bottom of the heating chamber 3; at the same time, the sewage in the liquid storage tank 1 is moved by the circulating pump 13 through the circulating pipe 12 in the heat exchanger 4 and the liquid storage tank. The saturated steam circulates in the tank 1, and enters the jacket 2 to heat and evaporate the sewage in the heating chamber 3. The condensed water generated by the saturated steam enters the condensed water inlet pipe 221 through the condensed water transport pipe 23 under the action of the steam trap 222, and then enters the heat exchanger 4 to exchange heat with the low-temperature sewage. The high-temperature condensed water in the saturated steam inlet pipe 22 enters the heat exchanger 4 through the condensed water inlet pipe 221 under the action of the steam trap 222 to exchange heat with the low-temperature sewage. The sewage preheated to a certain temperature enters the heating chamber 3 through the sewage transport pipe 31 under the action of the transport pump 11 to evaporate. Finally, the sewage residual liquid is discharged through the residual liquid outlet pipe 24 and sent to post-treatment.

[0032] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0034] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An evaporator for sewage treatment, characterized in that: The invention comprises a liquid storage tank (1) and an evaporation mechanism, wherein the evaporation mechanism comprises a heating chamber (3), the heating chamber (3) is fixedly connected to a jacket (2); a saturated steam inlet pipe (22) is fixedly connected to the outer wall of the jacket (2); a condensate water transport pipe (23) is fixedly connected to the bottom of the jacket (2); a circulation pipe (12) is fixedly connected to the side wall of the bottom of the liquid storage tank (1); the circulation pipe (12) is sequentially connected to a circulation pump (13) and a heat exchanger (4); the end of the circulation pipe (12) is fixedly connected to the liquid storage tank ( 1) side wall; a condensate outlet pipe (41) is fixedly connected to the heat exchanger (4); a condensate inlet pipe (221) is fixedly connected to the saturated steam inlet pipe (22); the condensate inlet pipe (221) is connected to the heat exchanger (4); a steam trap (222) is installed on the condensate inlet pipe (221); one end of the condensate transport pipe (23) is connected to the condensate inlet pipe (221); and a steam trap (222) is installed on the condensate transport pipe (23).

2. The evaporator for sewage treatment according to claim 1, characterized in that: A residual liquid outlet pipe (24) and a support frame (21) are fixedly connected to the bottom of the jacket (2), and the residual liquid outlet pipe (24) passes through the jacket (2) and is connected to the heating chamber (3); a sewage transport pipe (31) is fixedly connected to the top of the heating chamber (3); one end of the sewage transport pipe (31) passes through a transport pump (11) and is fixedly connected to the top of the liquid storage tank (1), and the sewage transport pipe (31) extends into the interior of the liquid storage tank (1); the transport pump (11) is fixedly connected to the top of the liquid storage tank (1).

3. The evaporator for sewage treatment according to claim 2, characterized in that: The top of the heating chamber (3) is fixedly connected to a motor box (32); the motor box (32) drives a rotating rod (321); the rotating rod (321) passes through the top of the heating chamber (3); a pair of stirring plates (322) are fixedly connected to the rotating rod (321); a group of scrapers (323) are fixedly connected to the bottom end of the rotating rod (321), and the scrapers (323) are in contact with the inner wall of the bottom of the heating chamber (3).

4. The evaporator for sewage treatment according to claim 3, characterized in that: A baffle plate (33) is fixedly connected to the inner wall of the heating chamber (3), and the baffle plate (33) is located on the stirring plate (322); a diversion port is provided on the baffle plate (33).

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