WO2021254541A1 - Neutralization box - Google Patents

Neutralization box Download PDF

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Publication number
WO2021254541A1
WO2021254541A1 PCT/CZ2021/000025 CZ2021000025W WO2021254541A1 WO 2021254541 A1 WO2021254541 A1 WO 2021254541A1 CZ 2021000025 W CZ2021000025 W CZ 2021000025W WO 2021254541 A1 WO2021254541 A1 WO 2021254541A1
Authority
WO
WIPO (PCT)
Prior art keywords
condensate
neutralization box
vertical wall
neutralization
box
Prior art date
Application number
PCT/CZ2021/000025
Other languages
French (fr)
Other versions
WO2021254541A9 (en
Inventor
Pavel ULRICH
Original Assignee
Almeva East Europe A.S.
Almeva Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Almeva East Europe A.S., Almeva Ag filed Critical Almeva East Europe A.S.
Priority to EP21752495.8A priority Critical patent/EP4165351A1/en
Publication of WO2021254541A1 publication Critical patent/WO2021254541A1/en
Publication of WO2021254541A9 publication Critical patent/WO2021254541A9/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/685—Devices for dosing the additives
    • C02F1/688—Devices in which the water progressively dissolves a solid compound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F24H8/006—Means for removing condensate from the heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/40—Arrangements for preventing corrosion
    • F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the invention relates to a neutralization box, the incorporation of which between the outlet of acid condensate from condensing boilers and the flue reduces the acidity of the condensate and, thereby, prevents damage to the sewer pipeline.
  • condensing boilers produces condensates, which do not represent an environmental problem generally.
  • clean combustion takes place, with the condensate pH of usually about 5.9 to 7.
  • the discharge of condensates into the sewerage system usually improves the high sewage pH caused by detergents and cleaning agents of an alkaline character.
  • a different situation occurs in imperfect combustion characterised by a lack of oxygen or at high return- water temperature when the condensate pH is in the lower range of 3.7. (Lower pH is typical for low-temperature boilers, for example) .
  • the conventional neutralization boxes work on the principle of a pressureless flow-through filter that neutralises acidic condensate from condensing boilers.
  • the maximum condensate flow rate through the box is related to the boiler output, based on a value of 0.11 litres of condensate per 1 k per hour.
  • Condensation box filling - the filter is mainly made of filtration materials such as crushed dolomitic limestone in the form of gravel.
  • the limestone dissolves when the acidic condensate flows through and thus neutralises the condensate.
  • Free CO2 is removed from the condensate; it chemically reacts with the grains of the neutralising filtration material, increasing the pH value.
  • the condensate discharge from the flue or condensing boiler is connected to the neutralization box by a hose for condensate drainage.
  • a hose for condensate drainage.
  • the neutralization box is intended to raise the pH index above 6. This affects the limestone content and the size of the neutralization box.
  • the laboratory measurements have shown that the condensate flows along the path of least resistance from the inlet to the outlet and flows so fast that it reduces the efficiency of the neutralization boxes.
  • the shortcomings of the solutions mentioned above of neutralization boxes in the condensate discharge into the sewerage system are eliminated by a solution that reliably increases the efficiency of neutralization, thus saving filtration material and reducing the overall size of the box.
  • the interior of the box body is now filled with vertical PPH fins increasing the effective area of the filtration bed made of limestone granulate several times, through which the acidic condensate must flow from the inlet to the outlet, thus creating a resistance that results in a higher chemical reaction with the filtration material.
  • the design of the neutralization box that employs a large portion of the standard manufactured components is highly economically advantageous and makes this new product not too much more expensive.
  • the body of the neutralization box is usually in the shape of a hollow cuboid with a lid.
  • the fins are arranged in the inner space of the neutralization box body in regular spacing, longitudinally, or transversely, parallel, or divergent, in a vertical position so as to form a sinusoidal condensate flow from the inlet to the outlet, thus ensuring the longest possible filtration area in the neutralization box.
  • the number and spacing of the fins affect the effectiveness of the neutralization boxes. This implies a universal box size and measurability of efficiency dependent on the shape of the arrangement and possible rotation of the fins in the box.
  • the acidic condensate from the flue or condensing boiler is connected to the neutralization box by a hose for condensate drainage.
  • a hose for condensate drainage There is an opening on the box side to supply the acidic condensate to the neutralization; the condensate flow through this opening to the filtration bed made of limestone granulate is provided by means of a seal, a pipe, and a protective perforated tube. Due to the fins creating a sinusoidal flow, maximum usage of the surface area of the filtration bed (limestone granulate), through which the condensate must flow to the outlet, is provided, thus maximising the neutralization thereof. Neutralised condensate leaves the outlet usually located opposite the acidic condensate inlet and located higher than the inlet.
  • Fig. 1 spatial view of the neutralization box with the lid open;
  • Fig. 2 plan view inside the neutralization box body with the imaging section lines marked;
  • Fig. 4 front view of the neutralization box with the lid open, representing section B-B;
  • Fig. 5 detail of the acidic condensate inlet with a permeable part for the distribution of acidic condensate.
  • the described exemplary embodiment of the invention represents one option of the neutralization box embodiment, as shown in Figures 1 to 5.
  • the neutralization box A is intended to reduce the acidity of condensate from condensing boilers and flues by effective use of filtration material; in this case, limestone granulate B prepared from the dolomitic limestone.
  • the neutralization box A comprises a lid V and a body T, the inner space Tl of which, containing the limestone granulate B, is longitudinally and partially divided by several fins Ll, L2 shorter than the length of the inner space Tl of the body T of the neutralization box A, wherein each odd fin Ll is fixedly anchored on one side from the inside to the vertical wall Wl of the body T, and each even fin L2 is fixedly anchored from the inside to the vertical wall W2 of the body T, which is opposite to the vertical wall Wl, into which the inlet P of the acidic condensate K is led, while the outlet O of the neutralised condensate N is incorporated into the vertical wall W2.
  • the fins Ll and L2 are placed parallel to level of condensate in the neutralization box A. After the limestone granulate B has been depleted and lost due to dissolution during neutralization, it can be refilled or replaced by opening the lid V of the neutralization box A.
  • the neutralization box is designed to reduce the acidity of condensate coming out of condensing boilers and flues effectively and efficiently.
  • the inlet P of the acidic condensate K is led to the vertical wall Wl by means of a sealed pipe screw fitting PI, on the pipe outlet P2 of which a permeable part P3 with a spacer P4 is put.
  • the outlet O of the neutralised condensate N is led to the vertical wall W2 by means of a sealed pipe screw fitting 01, to which the sewer connection is connected from the outside of W2 of the neutralization box A.
  • the outlet O the neutralised condensate N, led into the vertical wall W2 is located higher than the inlet P of the acid condensate K, leading into the vertical wall Wl.
  • the function and operation of the neutralization box A are as follows.
  • the acidic condensate K from the condensing boiler or the flue enters the internal space T1 of the body T of the neutralization box A through the inlet P.
  • the inlet P of the acidic condensate K is led into the vertical wall Wl by means of a pipe screw fitting PI, on the pipe outlet P2 of which the permeable part (perforated tube, strainer, etc.) P3 with the spacer P4 is put.
  • the permeable part P3 ensures better distribution of the acidic condensate A into the filling made of the limestone granulate B, wherein the spacer P4 provides the correct positioning of the perforated tube inside the neutralization box A.
  • the inner space T1 is partially to completely filled with the limestone granulate B, which is distributed into several sections through the fins LI and L2.
  • the acidic condensate K flows through the inner space Tl of the body T, filled with limestone granulate B, and the flow of the acidic condensate K is directed by the fins LI and L2 so that it moves in sinusoids, resulting in a longer contact of the neutralised acidic condensate with the limestone granulate B and, thus, in more thorough neutralization thereof.
  • Neutralised condensate N is discharged from body T of the neutralization box A through the outlet O located higher than the inlet P of the acidic condensate K in order to maintain a permanent minimum

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)

Abstract

The neutralization box (A) intended to reduce the acidity of condensate from condensing boilers and flues comprises a lid (V) of the neutralization box (A) and a body T of the neutralization box (A), the inner space (T1) of which, containing the limestone granulate (B), is longitudinally and partially divided by several fins (L1, L2) shorter than the length of the inner space (T1) of the body (T) of the neutralization box (A), wherein each odd fin (L1) is fixedly anchored on one side from the inside to the vertical wall (W1) of the body (T), and each even fin (L2) is fixedly anchored from the inside to the vertical wall (W2) of the body (T), which is opposite to the vertical wall (W1), into which the inlet (P) of the acidic condensate (K) is led, while the outlet (0) of the neutralised condensate (N) is incorporated into the vertical wall (W2).

Description

Neutralization Box
Field of the Invention
The invention relates to a neutralization box, the incorporation of which between the outlet of acid condensate from condensing boilers and the flue reduces the acidity of the condensate and, thereby, prevents damage to the sewer pipeline.
State of the Art
The operation of condensing boilers produces condensates, which do not represent an environmental problem generally. When the boiler is properly adjusted, clean combustion takes place, with the condensate pH of usually about 5.9 to 7. The discharge of condensates into the sewerage system usually improves the high sewage pH caused by detergents and cleaning agents of an alkaline character. A different situation occurs in imperfect combustion characterised by a lack of oxygen or at high return- water temperature when the condensate pH is in the lower range of 3.7. (Lower pH is typical for low-temperature boilers, for example) . Today, most municipal wastewater is taken to wastewater treatment plants where sludge is biologically treated. Due to the use of alkaline cleaning products in households, the pH is generally too alkaline in sewerage systems and wastewater treatment plants. Therefore, the discharge of acidic condensates is usually beneficial for wastewater treatment plants. However, the situation may be different for sewerage systems if they are sensitive to more acidic pH. Current materials for sewers (including concrete ones) generally show sufficient resistance to the pH generated by condensing boilers. Older concrete sewers having compromised internal surfaces and highly acidic or spasmodic large amounts of condensate can be a problem. The acidity of the condensate becomes a significant problem when the condensate is not diluted with alkaline sewage, i.e., mainly in the case of large industrial boilers and boiler houses. Therefore, the acidity of the condensate must be reduced in neutralization boxes. The conventional neutralization boxes work on the principle of a pressureless flow-through filter that neutralises acidic condensate from condensing boilers. The maximum condensate flow rate through the box is related to the boiler output, based on a value of 0.11 litres of condensate per 1 k per hour.
Condensation box filling - the filter is mainly made of filtration materials such as crushed dolomitic limestone in the form of gravel. The limestone dissolves when the acidic condensate flows through and thus neutralises the condensate. Free CO2 is removed from the condensate; it chemically reacts with the grains of the neutralising filtration material, increasing the pH value.
The condensate discharge from the flue or condensing boiler is connected to the neutralization box by a hose for condensate drainage. There is an opening on the box side to supply the condensate to the neutralization; the condensate flow through this opening to the filtration bed, where the neutralization takes place, is provided by means of a seal, a pipe, and a protective perforated tube. There is an opening on the opposite side of the box to discharge the condensate to the sewage system; this opening is located above the inlet level to retain the condensate in the box. The neutralization box is intended to raise the pH index above 6. This affects the limestone content and the size of the neutralization box. The laboratory measurements have shown that the condensate flows along the path of least resistance from the inlet to the outlet and flows so fast that it reduces the efficiency of the neutralization boxes.
Summary of the Invention
The shortcomings of the solutions mentioned above of neutralization boxes in the condensate discharge into the sewerage system are eliminated by a solution that reliably increases the efficiency of neutralization, thus saving filtration material and reducing the overall size of the box. The interior of the box body is now filled with vertical PPH fins increasing the effective area of the filtration bed made of limestone granulate several times, through which the acidic condensate must flow from the inlet to the outlet, thus creating a resistance that results in a higher chemical reaction with the filtration material. The design of the neutralization box that employs a large portion of the standard manufactured components is highly economically advantageous and makes this new product not too much more expensive. The body of the neutralization box is usually in the shape of a hollow cuboid with a lid. The fins are arranged in the inner space of the neutralization box body in regular spacing, longitudinally, or transversely, parallel, or divergent, in a vertical position so as to form a sinusoidal condensate flow from the inlet to the outlet, thus ensuring the longest possible filtration area in the neutralization box. The number and spacing of the fins affect the effectiveness of the neutralization boxes. This implies a universal box size and measurability of efficiency dependent on the shape of the arrangement and possible rotation of the fins in the box.
The acidic condensate from the flue or condensing boiler is connected to the neutralization box by a hose for condensate drainage. There is an opening on the box side to supply the acidic condensate to the neutralization; the condensate flow through this opening to the filtration bed made of limestone granulate is provided by means of a seal, a pipe, and a protective perforated tube. Due to the fins creating a sinusoidal flow, maximum usage of the surface area of the filtration bed (limestone granulate), through which the condensate must flow to the outlet, is provided, thus maximising the neutralization thereof. Neutralised condensate leaves the outlet usually located opposite the acidic condensate inlet and located higher than the inlet. Explanation of Drawings
Further advantages and effects of the present invention are further apparent from the accompanying drawings, wherein:
Fig. 1 - spatial view of the neutralization box with the lid open;
Fig. 2 - plan view inside the neutralization box body with the imaging section lines marked;
Fig. 3- side view of the neutralization box representing section A-A;
Fig. 4 - front view of the neutralization box with the lid open, representing section B-B;
Fig. 5 - detail of the acidic condensate inlet with a permeable part for the distribution of acidic condensate.
Example of the Invention Embodiment
The described exemplary embodiment of the invention represents one option of the neutralization box embodiment, as shown in Figures 1 to 5.
The neutralization box A is intended to reduce the acidity of condensate from condensing boilers and flues by effective use of filtration material; in this case, limestone granulate B prepared from the dolomitic limestone. The neutralization box A comprises a lid V and a body T, the inner space Tl of which, containing the limestone granulate B, is longitudinally and partially divided by several fins Ll, L2 shorter than the length of the inner space Tl of the body T of the neutralization box A, wherein each odd fin Ll is fixedly anchored on one side from the inside to the vertical wall Wl of the body T, and each even fin L2 is fixedly anchored from the inside to the vertical wall W2 of the body T, which is opposite to the vertical wall Wl, into which the inlet P of the acidic condensate K is led, while the outlet O of the neutralised condensate N is incorporated into the vertical wall W2. The fins Ll and L2 are placed parallel to level of condensate in the neutralization box A. After the limestone granulate B has been depleted and lost due to dissolution during neutralization, it can be refilled or replaced by opening the lid V of the neutralization box A.
Industrial Applicability
The neutralization box is designed to reduce the acidity of condensate coming out of condensing boilers and flues effectively and efficiently.
each other at equal intervals in the inner space T1 of the body T. The inlet P of the acidic condensate K is led to the vertical wall Wl by means of a sealed pipe screw fitting PI, on the pipe outlet P2 of which a permeable part P3 with a spacer P4 is put. The outlet O of the neutralised condensate N is led to the vertical wall W2 by means of a sealed pipe screw fitting 01, to which the sewer connection is connected from the outside of W2 of the neutralization box A. The outlet O the neutralised condensate N, led into the vertical wall W2, is located higher than the inlet P of the acid condensate K, leading into the vertical wall Wl.
The function and operation of the neutralization box A are as follows. The acidic condensate K from the condensing boiler or the flue enters the internal space T1 of the body T of the neutralization box A through the inlet P. The inlet P of the acidic condensate K is led into the vertical wall Wl by means of a pipe screw fitting PI, on the pipe outlet P2 of which the permeable part (perforated tube, strainer, etc.) P3 with the spacer P4 is put. The permeable part P3 ensures better distribution of the acidic condensate A into the filling made of the limestone granulate B, wherein the spacer P4 provides the correct positioning of the perforated tube inside the neutralization box A. The inner space T1 is partially to completely filled with the limestone granulate B, which is distributed into several sections through the fins LI and L2. The acidic condensate K flows through the inner space Tl of the body T, filled with limestone granulate B, and the flow of the acidic condensate K is directed by the fins LI and L2 so that it moves in sinusoids, resulting in a longer contact of the neutralised acidic condensate with the limestone granulate B and, thus, in more thorough neutralization thereof. Neutralised condensate N is discharged from body T of the neutralization box A through the outlet O located higher than the inlet P of the acidic condensate K in order to maintain a permanent minimum

Claims

Claims
1.The neutralization box (A) intended to reduce the acidity of condensate from condensing boilers and flues, characterised in that it comprises the lid (V) of the neutralization box (A) and the body (T) of the neutralization box (A); the inner space (Tl) of which, containing the limestone granulate (B), is longitudinally and partially divided by several fins (LI, L2) shorter than the length of the inner space (Tl) of the body (T) of the neutralization box (A), wherein each odd fin (LI) is fixedly anchored on one side from the inside to the vertical wall (Wl) of the body (T), and each even fin (L2) is fixedly anchored from the inside to the vertical wall (W2) of the body (T), which is opposite to the vertical wall (Wl), into which the inlet (P) of the acidic condensate (K) is led, while the outlet (0) of the neutralised condensate (N) is incorporated into the vertical wall (W2).
2. The neutralization box according to claim 1, characterised in that the fins (LI and L2) are arranged parallel in the inner space (Tl) of the body (T).
3. The neutralization box according to claim 1, characterised in that the fins (LI and L2) are placed in the inner space (Tl) of the body (T) convergently.
4. The neutralization box according to claim 1, characterised in that the inlet (P) of the acidic condensate (K) is led into the vertical wall (Wl) by the pipe screw fitting (PI), on the pipe outlet (P2) of which the permeable part (P3) with the spacer (P4) is put.
5. The neutralization box according to claim 1, characterised in that the outlet (0) of the neutralised condensate (N), led into the vertical wall (W2) by the pipe screw fitting (01), is connected to a sewer connection on the outside.
PCT/CZ2021/000025 2020-06-16 2021-06-10 Neutralization box WO2021254541A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21752495.8A EP4165351A1 (en) 2020-06-16 2021-06-10 Neutralization box

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2020-37672U CZ34269U1 (en) 2020-06-16 2020-06-16 Neutralization box
CZPUV2020-37672 2020-06-16

Publications (2)

Publication Number Publication Date
WO2021254541A1 true WO2021254541A1 (en) 2021-12-23
WO2021254541A9 WO2021254541A9 (en) 2023-02-16

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ID=72048617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2021/000025 WO2021254541A1 (en) 2020-06-16 2021-06-10 Neutralization box

Country Status (3)

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EP (1) EP4165351A1 (en)
CZ (1) CZ34269U1 (en)
WO (1) WO2021254541A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001252676A (en) * 2000-03-10 2001-09-18 Osaka Gas Co Ltd Exhaust drain neutralizing device
JP2006102617A (en) * 2004-10-04 2006-04-20 Noritz Corp Drain treatment apparatus and hot-water supply apparatus equipped with the same
EP1886975A1 (en) * 2006-08-10 2008-02-13 Mommertz Wasser- und Wärmetechnik GmbH Neutraliser
JP2013163167A (en) * 2012-02-13 2013-08-22 Corona Corp Neutralization apparatus and hot water supply device having the same
US20200103141A1 (en) * 2018-09-28 2020-04-02 Michael Charles Bernasconi Condensate neutralizer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001252676A (en) * 2000-03-10 2001-09-18 Osaka Gas Co Ltd Exhaust drain neutralizing device
JP2006102617A (en) * 2004-10-04 2006-04-20 Noritz Corp Drain treatment apparatus and hot-water supply apparatus equipped with the same
EP1886975A1 (en) * 2006-08-10 2008-02-13 Mommertz Wasser- und Wärmetechnik GmbH Neutraliser
JP2013163167A (en) * 2012-02-13 2013-08-22 Corona Corp Neutralization apparatus and hot water supply device having the same
US20200103141A1 (en) * 2018-09-28 2020-04-02 Michael Charles Bernasconi Condensate neutralizer

Also Published As

Publication number Publication date
EP4165351A1 (en) 2023-04-19
WO2021254541A9 (en) 2023-02-16
CZ34269U1 (en) 2020-08-11

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